CN102535351A

CN102535351A - Web plate type bridge fabrication machine for constructing bridge under strong wind and high altitude conditions and construction process

Info

Publication number: CN102535351A
Application number: CN2012100615488A
Authority: CN
Inventors: 苗文怀; 邵怀全; 雷耀军; 王俊辉; 姚长文; 仲维玲; 邓有辉; 田育虎; 邱成林; 王炳乾; 王群英
Original assignee: China Railway 20th Bureau Group Corp
Current assignee: China Railway 20th Bureau Group Corp
Priority date: 2012-03-11
Filing date: 2012-03-11
Publication date: 2012-07-04
Anticipated expiration: 2032-03-11
Also published as: CN102535351B

Abstract

The invention discloses a web plate type bridge fabrication machine for constructing a bridge under strong wind and high altitude conditions and a construction process. The bridge fabrication machine comprises a bridge fabrication machine main body structure, a crown block system and a forward movement system, wherein the bridge fabrication machine main body structure comprises a left main body splicing structure and a right main body splicing structure which are distributed symmetrically; each main body splicing structure comprises a main beam section, a guide beam section and a tail beam feeding cantilever section; and low trimming beams which are distributed horizontally and are formed by assembling a left trimming beam with a right trimming beam are arranged under the main beam sections in the two main body splicing structures. The construction process comprises the following steps of: 1, splicing a first hole beam in a single hole beam or a multi-hole beam; 2, constructing the next hole beam; and 3, repeatedly constructing until all construction processes of constructed beams are finished. The bridge fabrication machine has a reasonable structural design, high construction efficiency, high bearing capacity and a good using effect, is convenient to process, manufacture and splice, is easy and convenient to operate, and can quickly and safely finish a section splicing construction process of a large-cross-section bridge under the strong wind and high altitude conditions with high quality.

Description

Bridge construction is with web-type bridge fabrication machine and construction technology under strong wind and the high empty condition

Technical field

The invention belongs to bridge fabrication machine assembling construction technical field, especially relate under a kind of strong wind and the high empty condition bridge construction with web-type bridge fabrication machine and construction technology.

Background technology

The high 46.5m of maximum pier of the newly-built Lan-xing Railway second two-wire (Xinjiang section) LXTJ1 mark DK1123+907 red building river grand bridge (L=1651.19m), superstructure is 33 hole 48m prestressed concrete two-wire simple supported box beams, adopts the section assembling technology to construct.The 48m prestressed concrete two-wire simple supported box beam that is adopted is assemblied to form by 11 box girder segments continuously.During practice of construction; The heaviest sections weight 150t in 11 box girder segments that adopted, whole opening box girder weight 1800t, the case depth of beam is that 4.6m and its bridge floor transverse width are 12.2m; Thereby case beam section area is bigger; Belong to large-tonnage, heavy in section case beam, adopt common railway bridge fabrication machine, can't set up at all.

In addition; Because this bridge is located in the cigarette pier II level wind district in severe cold Gobi desert, Xinjiang; This area with dry, amount of precipitation is little, ice period is long, day and night temperature is big, spring and autumn is windy, summer is very brief and hot, winter is very long and severe cold is its principal character; Annual average wind speed 4.5m/s, maximum timing wind speed 19.8m/s, extreme wind speed 25.8m/s year after year year after year.Strong wind takes place frequently under the weather, the box girder pre-stressed concrete two-wire of the 48m simple supported box beam that with the construction speed index in 12.5 days/hole 11 box girder segments is assembled into 1800t weight in the high-altitude of the nearly 52m of operation maximum height, and security risk is high, and difficulty of construction is very big.

Existing nowadays generally adopt the suspension bridge fabrication machine to carry out the construction of precast segment box girder assembling, and part worker point is because Bridge Pier is lower, and physical features is more smooth, the traveling of bridge fabrication machine is to rely under the bridge walking rails to accomplish.But because this bridge is owing to be located in the strong wind district; And multiple holes is striden high nearly 50 meters of pier, under multinomial unfavorable factors such as high-altitude strong wind district, carries out the consolidation service and the wet seam construction of large-tonnage, heavy in section case beam; Security risk is high, and the suffered extraneous objective factor of constructing is disturbed big.Simultaneously, the 1800t because this bridge case beam weighs certainly, the heaviest sections reaches 150t, has greatly increased the requirement of bridge fabrication machine at aspects such as load-bearing, lifting, linear controls.Thereby, be essential existing bridge fabrication machine structure and assembling construction process are improved, design a kind of construction demand under strong wind and the high empty condition, bridge fabrication machine that assembling construction process is simple and construction effect is good of being applicable to.

Summary of the invention

Technical problem to be solved by this invention is to above-mentioned deficiency of the prior art, provides a kind of reasonable in design, processing and fabricating and assembly unit easy for installation and use under strong wind easy and simple to handle, that weight capacity is strong, result of use is good and the high empty condition bridge construction to use the web-type bridge fabrication machine.

For solving the problems of the technologies described above; The technical scheme that the present invention adopts is: bridge construction is used the web-type bridge fabrication machine under a kind of strong wind and the high empty condition; Comprise the bridge fabrication machine agent structure, be installed in said bridge fabrication machine agent structure top and a plurality of beam sections of construction bridges lift respectively and transfer to being assemblied to form Overhead travelling crane system and drag the reach system that said bridge fabrication machine agent structure integral level moves forward; And be installed in below said bridge fabrication machine agent structure lower front, the middle part from front to back respectively and the front leg strut of lower rear, middle supporting leg and rear support leg; Said reach system is laid on the said bridge fabrication machine agent structure; It is characterized in that: said bridge fabrication machine agent structure comprises the main body splicing structure that is the symmetry laying about two; The structure of two said main body splicing structures all identical with size and the two all be vertically to laying, connect as one to the last portion connecting structure of laying through being level between the top of two said main body splicing structures; Said main body splicing structure comprises the girder section, be laid in the anterior nose girder section of girder section and be laid in the afterbody feeding beam cantilever segment at girder section rear portion, and said nose girder section is positioned at the dead ahead of girder section, and afterbody feeding beam cantilever segment is positioned at the dead astern of girder section; Said girder section, nose girder section and afterbody feeding beam cantilever segment all for by upper chord, lower chord and be installed in upper chord and lower chord between web member be assemblied to form and be vertically to the plane frame of laying; Said girder section for by the upper strata plane frame, be positioned at the middle level plane frame under the plane frame of said upper strata and be positioned at three layers of trussed construction that the lower floor's plane frame under the plane frame of said middle level is formed, said upper strata plane frame, middle level plane frame are all identical with the vertical height of lower floor's plane frame; The bottom flush of the bottom of said nose girder section and said middle level plane frame, and the middle part flush of the bottom of afterbody feeding beam cantilever segment and said middle level plane frame;

Be provided with under the girder section in two said main body splicing structures and be level to the following joist of laying; Girder section in two said main body splicing structures is respectively left side girder section and the right side girder section that is positioned at girder section right side, said left side; The transverse width of said joist down is identical with the spacing between girder section right side, said left side and the right side girder section; And following joist is assembled by left side joist and the right side joist that is positioned at joist right side, said left side, said left side joist be the bilateral symmetry laying with the right side joist and the structure of the two all identical with size; Connect through connector between the inside portion of said left side joist and right side joist, and all be connected in hinged way between the bottom of between the bottom of the outside portion of said left side joist and said left side girder section and the outside portion of said right side joist and said right side girder section.

Bridge construction is used the web-type bridge fabrication machine under above-mentioned strong wind and the high empty condition, it is characterized in that: said left side joist and said right side joist include horizontal tray and are laid in a plurality of vertical height adjustment parts on the said horizontal tray from front to back.

Bridge construction is used the web-type bridge fabrication machine under above-mentioned strong wind and the high empty condition; It is characterized in that: said left side joist and said right side joist are from front to back the assembly type joist that a plurality of planes joist of laying is assemblied to form continuously, and connect through assembly between adjacent two the said plane joists in front and back.

Bridge construction is used the web-type bridge fabrication machine under above-mentioned strong wind and the high empty condition; It is characterized in that: the quantity of said front leg strut, middle supporting leg and rear support leg is two; Two said front leg struts symmetry respectively are installed in two nose girder section lower front in the said main body splicing structure; And front leg strut can move forward and backward along the nose girder section; Said nose girder section bottom is provided with the horizontal sliding track that supplies front leg strut to move forward and backward, and said front leg strut comprises and being vertically to telescopic legs of laying one and the slippage wheel that is installed in said telescopic legs one top and can moves forward and backward along said horizontal sliding track; Two said in supporting legs be installed in the middle leg support columns of two nose girder section rearward end belows in the said main body splicing structure for symmetry respectively, and during the leg support column comprises in said the leg upper supporting column be installed in said in the middle leg lower supporting rod of leg upper supporting column below; Two said rear support legs are that symmetry is installed in two back leg support columns that the afterbody feeding beam cantilever segment in the said main body splicing structure is anterior respectively.

Bridge construction is used the web-type bridge fabrication machine under above-mentioned strong wind and the high empty condition, it is characterized in that: the longitudinal length of said joist down is less than the longitudinal length of girder section; Institute's construction bridges is single hole beam or multi-hole beam; Each Kong Liang in institute's construction bridges is assemblied to form by a plurality of beam sections; Said each hole beam carries out support fixation through being positioned at its bottom, rear and front end and two adjacent Bridge Pier of front and back respectively, and two said Bridge Pier are respectively front side Bridge Pier and the rear side Bridge Pier that is positioned at said front side Bridge Pier rear side; A plurality of said beam sections among said each Kong Liang include the front end beam sections of front side, the rear end beam sections of rear side and be laid in said front end beam sections from front to back and said rear end beam sections between a plurality of middle parts beam sections; Said down joist is for carrying out the platform for lining of integral assembling between two said Bridge Pier and to being supported in a hole beam between two said Bridge Pier; Spacing between two said Bridge Pier is that D and the said front end beam sections and the longitudinal length of said rear end beam sections that are supported between two said Bridge Pier are d, and the rearward end of the leading section of said joist down and spacing between the Bridge Pier of said front side and time joist and the spacing between the said rear side Bridge Pier are all less than d; The longitudinal length of said girder section and nose girder section is all greater than D, and the longitudinal length of following joist is less than D.

Bridge construction is used the web-type bridge fabrication machine under above-mentioned strong wind and the high empty condition, it is characterized in that: the height of institute's construction bridges is h, and the vertical height of said upper strata plane frame, middle level plane frame and lower floor's plane frame all is not less than h; The longitudinal length of each Kong Liang is L and L=48m ± 5m in institute's construction bridges; The longitudinal length of said girder section is 55m ± 5m; The said longitudinal length of joist down is 45m ± 5m, and the longitudinal length of said afterbody feeding beam cantilever segment is 10m ± 2m, and the longitudinal length of nose girder section is 55m ± 5m.

Simultaneously; The invention also discloses a kind of construction sequence simple, realize convenient and efficiency of construction is high, the bridge assembling construction process that can be under strong wind and high empty condition carry out the high-quality construction to the heavy in section bridge; Institute's construction bridges is single hole beam or multi-hole beam; And each Kong Liang in institute's construction bridges is assemblied to form by a plurality of beam sections, and said each hole beam carries out support fixation through two Bridge Pier that are positioned at its bottom, rear and front end respectively, it is characterized in that this technology may further comprise the steps:

The first hole beam in step 1, assembling construction single hole beam or the assembling construction multi-hole beam: two Bridge Pier that construction single hole beam or the first hole beam are supported are respectively between Bridge Pier one and the Bridge Pier two; Said Bridge Pier two and said Bridge Pier one adjacent and its be positioned at said Bridge Pier one front side; Said Bridge Pier one is an abutment one, the work progress of the single hole beam of constructing or the first hole beam following:

The reach of step 101, bridge fabrication machine puts in place: through said reach system said bridge fabrication machine agent structure integral level is moved forward, the following joist in said bridge fabrication machine agent structure moves between abutment one and the said Bridge Pier two; Afterwards, the inner Overhead travelling crane system of installing of said bridge fabrication machine agent structure that puts in place in reach;

Step 102, single hole beam or the first hole beam assembling construction: a plurality of beam sections that adopt said Overhead travelling crane system will form the said single hole beam or the first hole beam lift successively and are transplanted on down on the joist; Accomplish the assembly unit process of a plurality of said beam sections afterwards according to conventional bridge subsection assembling and construction method and on following joist; Obtain the single hole beam or the first hole beam that assembly unit is accomplished, and the single hole beam of assembly unit completion or the front and back end portion of the first hole beam are supported and fixed on respectively on said Bridge Pier two and the abutment one;

When institute's construction bridges is the single hole beam, accomplish whole work progresss of institute's construction bridges in the step 1; When institute's construction bridges is multi-hole beam, get into step 2;

Step 2, next hole beam construction, its work progress is following:

Step 201, joist split down: remove the said connector between left side joist and the right side joist described in the joist down; And said left side joist and right side joist rotated to be vertical state by level; This moment, said left side joist and said left side girder section were positioned on the same perpendicular, and right side joist and said right side girder section are positioned on the same perpendicular;

The hole is striden in the reach of step 202, bridge fabrication machine agent structure: through said reach system said bridge fabrication machine agent structure and Overhead travelling crane system integral level mounted thereto are moved forward, the following joist in said bridge fabrication machine agent structure moves to the construction location place of next Kong Liang; The front and back end portion of said next Kong Liang is supported in the front axle beam pier respectively and is positioned on the axle casing pier of said front axle beam pier rear side;

When treating that following joist in the said bridge fabrication machine agent structure moves to the construction location place of next Kong Liang; Two said middle supporting legs prop up and withstand on the said front axle beam pier; And said bridge fabrication machine agent structure is in level; Afterwards front leg strut is moved forward along said horizontal sliding track, and front leg strut propped up withstand on adjacent with said front axle beam pier and be positioned on the Bridge Pier of said front axle beam pier front side, accomplish the reach of said bridge fabrication machine agent structure and stride the hole process this moment;

Step 203, next hole beam assembling construction: a plurality of beam sections that adopt Overhead travelling crane system will form said next Kong Liang lift successively and are transplanted on down on the joist; Accomplish the assembly unit process of a plurality of said beam sections afterwards according to conventional bridge subsection assembling and construction method and on following joist; Obtain next Kong Liang that assembly unit is accomplished, and the front and back end portion of next Kong Liang that assembly unit is accomplished is supported and fixed on respectively on said front axle beam pier and the axle casing pier;

Step 3, repeating step two repeatedly are until whole work progresss of accomplishing institute's construction bridges.

Above-mentioned construction technology is characterized in that: when through said reach system said bridge fabrication machine agent structure integral level being moved forward in the step 101, its process that moves forward is following:

Step 1011, the assembly unit of bridge fabrication machine overhead structure: on the smooth vacant lot in abutment one dead astern; Said upper strata plane frame and middle level plane frame in nose girder section in two said main body splicing structures, afterbody feeding beam cantilever segment, the girder section and the said portion connecting structure of going up that is connected between two said main body splicing structure tops are carried out assembly unit, and obtain the bridge fabrication machine overhead structure that assembly unit is accomplished; After said bridge fabrication machine overhead structure assembly unit is accomplished; Two said front leg struts are installed in two said main body splicing structures the nose girder section lower front that assembly unit is accomplished respectively; And the bottom of front leg strut propped up withstand on the abutment one; Simultaneously with two said in the middle leg upper supporting column of supporting legs be installed in two said main body splicing structures the nose girder section rearward end below that assembly unit is accomplished respectively, and it is anterior that two said rear support legs are installed in two said main body splicing structures afterbody feeding beam cantilever segment respectively;

Step 1012, bridge fabrication machine overhead structure are tentatively dilatory to move ahead: before preliminary dilatory the moving ahead; Also need adopt the afterbody bracing or strutting arrangement that the afterbody of the overhead structure of bridge fabrication machine described in the step 1011 is propped up overhead; Simultaneously with the said telescopic legs in the front leg strut described in the step 1,011 one jack-up upwards, and make said bridge fabrication machine overhead structure be in level; Afterwards, with the translation forward of said bridge fabrication machine overhead structure, the nose girder section rearward end in said bridge fabrication machine overhead structure is positioned at till abutment one top through said reach system;

Step 1013, middle leg upper supporting column are interim to be supported and the front leg strut reach: the said telescopic legs one in the front leg strut described in the step 1012 is shunk downwards, in this moment step 1011 in installation said leg upper supporting column bottom prop up and withstand on the abutment one; Afterwards, set horizontal sliding track moves forward to said Bridge Pier two tops along nose girder section bottom with said front leg strut, and front leg strut propped up withstands on the said Bridge Pier two;

Step 1014, bridge fabrication machine overhead structure are further dilatory to move ahead and the assembly unit of bridge fabrication machine lower body part structure: earlier with the said telescopic legs in the front leg strut described in the step 1,013 one jack-up and make said bridge fabrication machine overhead structure be in level upwards, the middle leg upper supporting column bottom described in this moment step 1013 breaks away from abutment one; Afterwards, through said reach system said bridge fabrication machine overhead structure is continued translation forward, the nose girder section rearward end in said bridge fabrication machine overhead structure is positioned at till said Bridge Pier two tops;

And said bridge fabrication machine overhead structure is continued in the translation process forward through said reach system; Below the middle leg upper supporting column described in the step 1013 assembly unit said in leg lower supporting rod and obtain the middle supporting leg that assembly unit is accomplished, assembling bridge manufacturing machine lower body part structure and obtain the said bridge fabrication machine agent structure that assembly unit is accomplished on said bridge fabrication machine overhead structure simultaneously; Said bridge fabrication machine lower body part structure comprises the lower floor's plane frame in the girder section and is laid in two following joists under the said main body splicing structure middle girder section;

When treating that nose girder section rearward end in the said bridge fabrication machine overhead structure is positioned at said Bridge Pier two tops; Said telescopic legs one in the front leg strut is shunk downwards; The middle supporting leg bottom that assembly unit this moment is accomplished withstands on the said Bridge Pier two and said bridge fabrication machine overhead structure is in level; Afterwards front leg strut is moved forward along said horizontal sliding track; And front leg strut propped up withstand on the Bridge Pier three, accomplish the assembly unit and the dilatory process that moves ahead of said bridge fabrication machine agent structure this moment, and down joist between abutment one and said Bridge Pier two; Said Bridge Pier three is for being positioned at said Bridge Pier two front sides and the Bridge Pier adjacent with said Bridge Pier two.

Above-mentioned construction technology; It is characterized in that: the bridge fabrication machine overhead structure is further in the tentatively dilatory process neutralization procedure 1014 that moves ahead of bridge fabrication machine overhead structure in the step 1012 draws in the process that moves ahead, and said afterbody bracing or strutting arrangement moves forward with said bridge fabrication machine overhead structure along the smooth vacant lot in abutment one dead astern synchronously; The reach of bridge fabrication machine agent structure is striden in the process of hole in the step 202, and said afterbody bracing or strutting arrangement is accomplished the beam section along the construction that is positioned at said axle casing pier dead astern and moved forward synchronously with said bridge fabrication machine overhead structure; When the nose girder section rearward end in the said bridge fabrication machine overhead structure was positioned at said Bridge Pier two tops, two said rear support legs propped up and withstand on the abutment one in the step 1014; When the following joist in the said bridge fabrication machine agent structure moved to the construction location place of next Kong Liang, two said rear support legs propped up and withstand on the said axle casing pier in the step 202.

Above-mentioned construction technology is characterized in that: the said left side joist and the said right side joist of joist include horizontal tray and are laid in a plurality of vertical height adjustment parts on the said horizontal tray from front to back down in the said bridge fabrication machine agent structure; When carrying out next hole beam assembling construction when carrying out the single hole beam or the first hole beam assembling construction in the step 102 and in the step 203, utilize a plurality of said vertical height adjustment parts that the absolute altitude of a plurality of said beam sections is adjusted.

The present invention compared with prior art has the following advantages:

1, the web-type bridge fabrication machine reasonable in design that is adopted, span are big, processing and fabricating and assembly unit is easy for installation and weight capacity is strong.

2, the used whole connection of bridge fabrication machine agent structure is reliable, and easy to assembly, and main employing " military eight or seven beams " is that basic rod member is assembled.

3, the assembling and construction method step of bridge fabrication machine agent structure is simple and realize conveniently, actually earlier the bridge fabrication machine overhead structure is carried out assembly unit when carrying out assembly unit, and after assembly unit accomplishes, carries out the dilatory previous operation of complete machine; In the dilatory process that moves ahead, bridge fabrication machine lower body part structure is carried out assembly unit, and the corresponding debugging operation of carrying out complete machine, make it reach the normal operation condition of the first hole beam.

4, use is easy and simple to handle, result of use good and the quality of institute's assembling construction bridge is high; Be particularly useful for heavy in section, large-tonnage beam sections assembling construction under many unfavorable factors such as strong wind and high-altitude; Each beam sections lifted carry out assembling construction in the bridging ventral; Utilize members such as following joist, solved the potential safety hazard of personnel and section box girder operation assembly unit under the strong wind weather of high-altitude, receive also minimizings relatively of objective factor restriction such as weather.

5, efficiency of construction is high, under many unfavorable factors such as strong wind and high-altitude, can accomplish safety and the high-quality assembling construction process that realizes big sections, heavy in section case beam with the construction speed in 12.5 days/hole.

6, practical value is high, can effectively be applicable to heavy in section, large-tonnage section assembling bridging work progress, owing to can satisfy the construction operation demand of many unfavorable factors such as strong wind and high-altitude.High-speed railway two-wire 48m sections simple supported box beam, the heaviest beam sections 150t belongs to large-tonnage box beam; And be barren beach in the Gobi desert, Xinjiang, be located in the strong wind arid area, surface relief is bigger; The bridge pier height is built high-speed railway two-wire Box-girder Bridges greater than 50m, from the relatively more suitable bigger simply supported girder bridge of span of building of economy; Construction bridge under operating environments such as Gobi desert lack of water, strong wind, high and cold and high-altitude; Batch production precast concrete section box girder helps quality of concrete and environmental protection requirement, has filled up the blank of building similar bridge in this area, and the similar engineering design of high ferro is also had very big reference.The actual beam section of carrying out is when prefabricated, and near the precasting yard of beam section bridge location is prefabricated, after the prefabricated end, the sections of case beam is assembled into bridge on bridge fabrication machine, has significantly reduced construction cost.

In sum; Bridge fabrication machine reasonable in design, processing and fabricating and the assembly unit that the present invention adopted is easy for installation, efficiency of construction is high and it is easy and simple to handle to use, weight capacity is strong, result of use is good, can be fast, safety and accomplish the section assembling work progress of heavy in section bridge under strong wind and the high empty condition in high quality.

Through accompanying drawing and embodiment, technical scheme of the present invention is done further detailed description below.

Description of drawings

Fig. 1 by the present invention the user mode reference diagram of employing web-type bridge fabrication machine.

Fig. 2 is for adopting the mobile status sketch map after the present invention carries out integral level the assembly unit of bridge fabrication machine overhead structure is accomplished when moving forward the bridge fabrication machine agent structure.

Fig. 3 tentatively draws the mobile status sketch map after moving ahead for adopting the present invention to the bridge fabrication machine overhead structure.

Fig. 4 moves ahead and the bridge fabrication machine mobile status sketch map of bridge fabrication machine lower body part structure assembly unit after accomplishing to the bridge fabrication machine overhead structure is further dilatory for adopting the present invention.

Fig. 5 carries out the feeding beam view in the bridge assembling construction process for adopting the present invention.

Construction technology process block diagram when Fig. 6 carries out assembling construction for adopting the present invention to multi-hole beam.

Description of reference numerals:

1-girder section; 2-nose girder section; 3-afterbody feeding beam cantilever segment;

The 4-1-upper chord; The 4-2-lower chord; The 4-3-web member;

Joist under the 5-; The 5-1-longeron; The 5-2-crossbeam;

The 6-front leg strut; Supporting leg among the 7-; The 8-rear support leg;

The 9-Bridge Pier; 10-adjusts leading screw; 11-abutment one;

12-has constructed and has accomplished the beam section; The 13-box girder segment; 14-bridge pier two;

Trolley before the 15-; Trolley behind the 16-; 17-bridge pier three;

24-fortune beam dolly.

The specific embodiment

Bridge construction is used the web-type bridge fabrication machine under a kind of strong wind as shown in Figure 1 and the high empty condition; Comprise the bridge fabrication machine agent structure, be installed in said bridge fabrication machine agent structure top and a plurality of beam sections of construction bridges lift respectively and transfer to being assemblied to form Overhead travelling crane system and drag the reach system that said bridge fabrication machine agent structure integral level moves forward; And the front leg strut 6, middle supporting leg 7 and the rear support leg 8 that are installed in said bridge fabrication machine agent structure lower front, middle part below and lower rear from front to back respectively, said reach system is laid on the said bridge fabrication machine agent structure.Said bridge fabrication machine agent structure comprises the main body splicing structure that is the symmetry laying about two; The structure of two said main body splicing structures all identical with size and the two all be vertically to laying, connect as one to the last portion connecting structure of laying through being level between the top of two said main body splicing structures; Said main body splicing structure comprises girder section 1, be laid in the anterior nose girder section 2 of girder section 1 and be laid in the afterbody feeding beam cantilever segment 3 at girder section 1 rear portion; Said nose girder section 2 is positioned at the dead ahead of girder section 1, and afterbody feeding beam cantilever segment 3 is positioned at the dead astern of girder section 1.Said girder section 1, nose girder section 2 and afterbody feeding beam cantilever segment 3 all for by upper chord 4-1, lower chord 4-2 and be installed in upper chord 4-1 and lower chord 4-2 between web member 4-3 be assemblied to form and be vertically to the plane frame of laying.Said girder section 1 for by the upper strata plane frame, be positioned at the middle level plane frame under the plane frame of said upper strata and be positioned at three layers of trussed construction that the lower floor's plane frame under the plane frame of said middle level is formed, said upper strata plane frame, middle level plane frame are all identical with the vertical height of lower floor's plane frame.The bottom flush of the bottom of said nose girder section 2 and said middle level plane frame, and the middle part flush of the bottom of afterbody feeding beam cantilever segment 3 and said middle level plane frame.In the present embodiment, said nose girder section 2 is the two-tier truss structure.

Be provided with under the girder section 1 in two said main body splicing structures and be level to the following joist of laying 5; Girder section 1 in two said main body splicing structures is respectively left side girder section and the right side girder section that is positioned at girder section right side, said left side; The transverse width of said joist 5 down is identical with the spacing between girder section right side, said left side and the right side girder section; And following joist 5 is assembled by left side joist and the right side joist that is positioned at joist right side, said left side, said left side joist be the bilateral symmetry laying with the right side joist and the structure of the two all identical with size.Connect through connector between the inside portion of said left side joist and right side joist, and all be connected in hinged way between the bottom of between the bottom of the outside portion of said left side joist and said left side girder section and the outside portion of said right side joist and said right side girder section.

In the present embodiment, said connector is a connecting pin, and all is connected through bearing pin between the bottom of between the bottom of the outside portion of said left side joist and said left side girder section and the outside portion of said right side joist and said right side girder section.

In the present embodiment, said left side joist and said right side joist include horizontal tray and are laid in a plurality of vertical height adjustment parts on the said horizontal tray from front to back.

When actual processing and fabricating and assembling construction, said horizontal tray is assemblied to form with the crossbeam 5-2 that Duo Gen is parallel laying by the many longeron 5-1 that are parallel laying, and said longeron 5-1 is parallel laying with girder section 1 and it is vertical laying with crossbeam 5-2.

In the present embodiment, the actual laying when installing, a plurality of said vertical height adjustment parts are laid on the same straight line, and a plurality of said vertical height adjustment part all is laid on the longeron 5-1.

In the present embodiment, said vertical height adjustment part is to be vertical to the adjustment leading screw of laying 10, and dismounting and use operation are all very easy.During practice of construction, also can adopt the vertical height adjustment part of other type.

In the present embodiment, said left side joist and said right side joist are from front to back the assembly type joist that a plurality of planes joist of laying is assemblied to form continuously, and connect through assembly between adjacent two the said plane joists in front and back.

In the present embodiment; The quantity of said front leg strut 6, middle supporting leg 7 and rear support leg 8 is two; Two said front leg struts 6 symmetry respectively are installed in two nose girder section 2 lower front in the said main body splicing structure; And front leg strut 6 can move forward and backward along nose girder section 2; Said nose girder section 2 bottoms are provided with the horizontal sliding track that supplies front leg strut 6 to move forward and backward, and said front leg strut 6 comprises and being vertically to telescopic legs of laying one and the slippage wheel that is installed in said telescopic legs one top and can moves forward and backward along said horizontal sliding track.Two said in supporting legs 7 be installed in the middle leg support columns of two nose girder section 2 rearward end belows in the said main body splicing structure for symmetry respectively, and during the leg support column comprises in said the leg upper supporting column be installed in said in the middle leg lower supporting rod of leg upper supporting column below.Two said rear support legs 8 are the symmetrical respectively back leg support column that is installed in two afterbody feeding beam cantilever segment 3 front portions in the said main body splicing structure.

During actual processing and fabricating, the longitudinal length of said joist 5 down is less than the longitudinal length of girder section 1.Institute's construction bridges is single hole beam or multi-hole beam; Each Kong Liang in institute's construction bridges is assemblied to form by a plurality of beam sections; Said each hole beam carries out support fixation through being positioned at its bottom, rear and front end and adjacent two Bridge Pier 9 in front and back respectively, and two said Bridge Pier 9 are respectively front side Bridge Pier and the rear side Bridge Pier that is positioned at said front side Bridge Pier rear side.A plurality of said beam sections among said each Kong Liang include the front end beam sections of front side, the rear end beam sections of rear side and be laid in said front end beam sections from front to back and said rear end beam sections between a plurality of middle parts beam sections; Said down joist 5 is for carrying out the platform for lining of integral assembling between two said Bridge Pier 9 and to being supported in a hole beam between two said Bridge Pier 9; Spacing between two said Bridge Pier 9 is that D and the said front end beam sections and the longitudinal length of said rear end beam sections that are supported between two said Bridge Pier 9 are d, and the rearward end of the leading section of said joist 5 down and spacing between the Bridge Pier of said front side and time joist 5 and the spacing between the said rear side Bridge Pier are all less than d; The longitudinal length of said girder section 1 and nose girder section 2 is all greater than D, and the longitudinal length of following joist 5 is less than D.In the present embodiment, said down joist 5 be positioned at girder section 1 under.

In the present embodiment, during actual assembly unit, said upper chord 4-1, lower chord 4-2 and web member 4-3 are eight or seven military beams.

In the present embodiment, the spacing between two said main body splicing structures is greater than the transverse width of institute's construction bridges.Said girder section 1, nose girder section 2 are all identical with the top absolute altitude of afterbody feeding beam cantilever segment 3.The height of institute's construction bridges is h, and the vertical height of said upper strata plane frame, middle level plane frame and lower floor's plane frame all is not less than h.

During practice of construction; The longitudinal length of each Kong Liang is L and L=48m ± 5m in institute's construction bridges; The longitudinal length of said girder section 1 is 55m ± 5m; The said longitudinal length of joist 5 down is 45m ± 5m, and the longitudinal length of said afterbody feeding beam cantilever segment 3 is 10m ± 2m, and the longitudinal length of nose girder section 2 is 55m ± 5m.

In the present embodiment, the construction bridges total length 1651.19m of institute, the basis is the basis of digging a well; Bridge Pier 9 is round end type hollow pier and solid pier; The high 46.5m of maximum pier, the superstructure of institute's construction bridges is that 33 hole spans are the prestressed concrete two-wire simple supported box beam of 48m, adopts the construction of section assembling technology; The about 1800t of whole opening box girder deadweight; Each Kong Liang is assemblied to form by the rear end beam sections of the front end beam sections of 1 single hop length 2.7m, 9 middle part beam sections and 1 single hop length 2.7m, and middle part beam sections one and 2 that 9 said middle part beam sections include 7 single hop length 4.3m are connected between middle part beam sections one and front end beam sections and the rear end beam sections and beam sections two in the middle part of the transition section of 2 single hop length 4.0m, that is to say; Each Kong Liang is assemblied to form by 11 beam sections; And 11 said beam sections are box girder segment 13, the top width 12.2m of monolithic box girder segment 13, bottom width 5.5m and its deck-molding 4.6m; The weight 150t of maximum monolithic box girder segment 13 adopts the wet seam of the thick C50 steel concrete of 0.6m to connect between adjacent two the said box girder segments 13 in front and back.This bridge is located in Gobi desert, Xinjiang severe cold area, is subordinate to cigarette Dun Feng district, and the wind zoning is divided into II level wind district, and the construction phase of stopping in winter reaches four months, and progress indicator is 12.5 days/hole.

Thereby; The longitudinal length L=48m of each Kong Liang in institute's construction bridges; The said longitudinal length of joist 5 down is 45.3m; Space D=49.5m between two said Bridge Pier 9, for arbitrary Kong Liang, the leading section of said joist 5 down and the spacing between the Bridge Pier of said front side and the rearward end of time joist 5 and the spacing between the said rear side Bridge Pier are 2.1m.

In the present embodiment, the longitudinal length of said bridge fabrication machine agent structure is 120m, and the longitudinal length of said girder section 1 is 55m, and the longitudinal length of afterbody feeding beam cantilever segment 3 is 10m, and the longitudinal length of nose girder section 2 is 55m.

In the present embodiment, as shown in Figure 6, when institute's construction bridges is carried out assembling construction, may further comprise the steps:

The first hole beam in step 1, assembling construction single hole beam or the assembling construction multi-hole beam: two Bridge Pier 9 that construction single hole beam or the first hole beam are supported are respectively between Bridge Pier one and the Bridge Pier two; Said Bridge Pier two and said Bridge Pier one adjacent and its be positioned at said Bridge Pier one front side; Said Bridge Pier one is an abutment 1, the work progress of the single hole beam of constructing or the first hole beam following:

The reach of step 101, bridge fabrication machine puts in place: through said reach system said bridge fabrication machine agent structure integral level is moved forward, the following joist 5 in said bridge fabrication machine agent structure moves between abutment 1 and the said Bridge Pier two; Afterwards, the inner Overhead travelling crane system of installing of said bridge fabrication machine agent structure that puts in place in reach.

In the present embodiment, said Bridge Pier two is a bridge pier 2 14.Said Overhead travelling crane system comprises the preceding trolley 15 and back trolley 16 that is installed on said bridge fabrication machine agent structure inside.

In the present embodiment, when through said reach system said bridge fabrication machine agent structure integral level being moved forward in the step 101, its process that moves forward is following:

Step 1011, the assembly unit of bridge fabrication machine overhead structure: on the smooth vacant lot in abutment one 11 dead asterns; Said upper strata plane frame and middle level plane frame in nose girder section 2 in two said main body splicing structures, afterbody feeding beam cantilever segment 3, the girder section 1 and the said portion connecting structure of going up that is connected between two said main body splicing structure tops are carried out assembly unit, and obtain the bridge fabrication machine overhead structure that assembly unit is accomplished; After said bridge fabrication machine overhead structure assembly unit is accomplished; Two said front leg struts 6 are installed in two said main body splicing structures nose girder section 2 lower front that assembly unit is accomplished respectively; And the bottom of front leg strut 6 propped up withstand on the abutment 1; Simultaneously with two said in the middle leg upper supporting column of supporting legs 7 be installed in two said main body splicing structures the nose girder section 2 rearward end below that assembly unit is accomplished respectively; And two said rear support legs 8 are installed in afterbody feeding beam cantilever segment 3 front portions in two said main body splicing structures respectively, and this moment, the concrete mobile status of bridge fabrication machine overhead structure saw Fig. 2 for details.

In the present embodiment, be on the roadbed of 120m the bridge fabrication machine overhead structure to be carried out assembly unit in abutment one 11 dead asterns and length.During practice of construction, elder generation is smooth assembly unit place in the long place of abutment one 11 dead astern 120m, and the gradient is laid the haul track of bridge fabrication machine by being not more than 8 ‰ controls, the minimum 50m of place transverse width.

Actual when the bridge fabrication machine overhead structure is carried out assembly unit, therefrom the installation place of supporting leg 7 respectively forwards, backwards both sides carry out assembly unit.

Step 1012, bridge fabrication machine overhead structure are tentatively dilatory to move ahead: before preliminary dilatory the moving ahead; Also need adopt the afterbody bracing or strutting arrangement that the afterbody of the overhead structure of bridge fabrication machine described in the step 1011 is propped up overhead; Simultaneously with the said telescopic legs in the front leg strut described in the step 1,011 6 one jack-up upwards, and make said bridge fabrication machine overhead structure be in level; Afterwards, with the translation forward of said bridge fabrication machine overhead structure, nose girder section 2 rearward end in said bridge fabrication machine overhead structure are positioned at till abutment one 11 tops through said reach system.

In the present embodiment, said afterbody bracing or strutting arrangement comprises walking mechanism and the bracing frame that is installed on the said walking mechanism and said bridge fabrication machine overhead structure afterbody is supported.

In the present embodiment, said walking mechanism is a running truck.During actual the use, also can adopt the walking mechanism of other type.

After said bridge fabrication machine overhead structure assembly unit is accomplished; Running truck is opened to the rear end of said bridge fabrication machine overhead structure and supported the afterbody of jack-up bridge fabrication machine overhead structure; Combine front leg strut 6 simultaneously; Make the whole support that breaks away from ground of said bridge fabrication machine overhead structure, the preliminary dilatory previous operation of bridge fabrication machine overhead structure is carried out in removing obstacles afterwards.

Step 1013, middle leg upper supporting column are interim to be supported and the front leg strut reach: the said telescopic legs one in the front leg strut described in the step 1,012 6 is shunk downwards, in this moment step 1011 in installation said leg upper supporting column bottom prop up and withstand on the abutment 1; Afterwards, set horizontal sliding track moves forward to said Bridge Pier two tops along nose girder section 2 bottoms with said front leg strut 6, and 6 of front leg struts are withstood on the said Bridge Pier two, and this moment, the concrete mobile status of bridge fabrication machine overhead structure saw Fig. 3 for details.

In the present embodiment, the said telescopic legs one in the said front leg strut 6 is for being carried out the supporting leg of telescopic drive by hydraulic jack.In the tentatively dilatory process that moves ahead of said bridge fabrication machine overhead structure; Nose girder section 2 rearward end in said bridge fabrication machine overhead structure are positioned at abutment one 11 tops; Stop when supporting leg 7 arrives abutment one 11 tops promptly, middle leg upper supporting column is supported on the abutment 1, and anchoring temporarily; Afterwards, shrink the hydraulic jack of front leg strut 6, and front leg strut 6 is moved on the bridge pier 2 14, and be supported on the pier top pinner of bridge pier 2 14 and carry out anchoring through the horizontal sliding track.

Step 1014, bridge fabrication machine overhead structure are further dilatory to move ahead and the assembly unit of bridge fabrication machine lower body part structure: earlier with the said telescopic legs in the front leg strut described in the step 1,013 6 one jack-up and make said bridge fabrication machine overhead structure be in level upwards, the middle leg upper supporting column bottom described in this moment step 1013 breaks away from abutment 1; Afterwards, through said reach system said bridge fabrication machine overhead structure is continued translation forward, nose girder section 2 rearward end in said bridge fabrication machine overhead structure are positioned at till said Bridge Pier two tops.

And said bridge fabrication machine overhead structure is continued in the translation process forward through said reach system; Below the middle leg upper supporting column described in the step 1013 assembly unit said in leg lower supporting rod and obtain the middle supporting leg 7 that assembly unit is accomplished, assembling bridge manufacturing machine lower body part structure and obtain the said bridge fabrication machine agent structure that assembly unit is accomplished on said bridge fabrication machine overhead structure simultaneously; Said bridge fabrication machine lower body part structure comprises the lower floor's plane frame in the girder section 1 and is laid in two following joists 5 under the said main body splicing structure middle girder section 1.

When treating that nose girder section 2 rearward end in the said bridge fabrication machine overhead structure are positioned at said Bridge Pier two tops; Said telescopic legs one in the front leg strut 6 is shunk downwards; Middle supporting leg 7 bottoms that assembly unit this moment is accomplished are propped up and are withstood on the said Bridge Pier two and said bridge fabrication machine overhead structure is in level; Afterwards front leg strut 6 is moved forward along said horizontal sliding track, and 6 of front leg struts are withstood on the Bridge Pier three, accomplish the assembly unit and the dilatory process that moves ahead of said bridge fabrication machine agent structure this moment; And following joist 5 is between abutment 1 and said Bridge Pier two, and this moment, the mobile status of bridge fabrication machine agent structure saw Fig. 4 for details.Said Bridge Pier three is for being positioned at said Bridge Pier two front sides and the Bridge Pier 9 adjacent with said Bridge Pier two.

The bridge fabrication machine overhead structure is further in the tentatively dilatory process neutralization procedure 1014 that moves ahead of bridge fabrication machine overhead structure in the step 1012 draws in the process that moves ahead; Utilize the smooth vacant lot in abutment one 11 dead asterns, said afterbody bracing or strutting arrangement moves forward with said bridge fabrication machine overhead structure synchronously.

In the present embodiment; The hydraulic jack of jacking front leg strut 6; After leg upper supporting column bottom broke away from the supporting surface of abutment 1 in making, said bridge fabrication machine overhead structure continued about 30 meters of translations forward, and in the moving process; Leg lower supporting rod and obtain the middle supporting leg 7 that assembly unit is accomplished in the assembly unit below middle leg upper supporting column, the front portion structure to said lower floor plane frame and following joist 5 carries out assembly unit simultaneously; Afterwards; Said bridge fabrication machine overhead structure continues translation forward once more; Nose girder section 2 rearward end in said bridge fabrication machine overhead structure (supporting leg 7 promptly) are stopped when being positioned at said Bridge Pier two tops; Shrink the hydraulic jack of front leg strut 6, middle supporting leg 7 is supported on the pier top pinner of bridge pier 2 14 and anchoring temporarily; Afterwards, shrink the hydraulic jack of front leg strut 6, through the horizontal sliding track front leg strut 6 is moved to and be positioned at bridge pier 2 14 front sides and bridge pier three 17 tops adjacent, and be supported on the pier top pinner of bridge pier 3 15 and carry out anchoring with bridge pier 2 14.

After treating that translation puts in place, when nose girder section 2 rearward end in the promptly said bridge fabrication machine overhead structure are positioned at said Bridge Pier two tops, the free bearing of rear support leg 8; Afterwards, the rear structure to said lower floor plane frame and following joist 5 carries out assembly unit.

In the present embodiment; The bridge fabrication machine overhead structure is further in the tentatively dilatory process neutralization procedure 1014 that moves ahead of bridge fabrication machine overhead structure in the step 1012 draws in the process that moves ahead, and said afterbody bracing or strutting arrangement moves forward with said bridge fabrication machine overhead structure along the smooth vacant lot in abutment one 11 dead asterns synchronously; Bridge fabrication machine agent structure reach is striden in the process of hole in the step 202, and said afterbody bracing or strutting arrangement is accomplished beam section 12 along the construction that is positioned at said axle casing pier dead astern and moved forward synchronously with said bridge fabrication machine overhead structure.

When nose girder section 2 rearward end in the said bridge fabrication machine overhead structure were positioned at said Bridge Pier two tops, two 8 of said rear support legs withstood on the abutment 1 in the step 1014; When the following joist 5 in the said bridge fabrication machine agent structure moved to the construction location place of next Kong Liang, two 8 of said rear support legs withstood on the said axle casing pier in the step 202.

Step 102, single hole beam or the first hole beam assembling construction: a plurality of beam sections that adopt said Overhead travelling crane system will form the said single hole beam or the first hole beam lift and are transplanted on down on the joist 5 successively; Accomplish the assembly unit process of a plurality of said beam sections afterwards according to conventional bridge subsection assembling and construction method and on following joist 5; Obtain the single hole beam or the first hole beam that assembly unit is accomplished, and the single hole beam of assembly unit completion or the front and back end portion of the first hole beam are supported and fixed on respectively on said Bridge Pier two and the abutment 1.

When institute's construction bridges is the single hole beam, accomplish whole work progresss of institute's construction bridges in the step 1; When institute's construction bridges is multi-hole beam, get into step 2.

In the present embodiment; Before a plurality of beam sections that adopt said Overhead travelling crane system will form the said single hole beam or the first hole beam lift and are transplanted on down on the joist 5 successively; Need to adopt earlier fortune beam dolly 24 that a plurality of said beam sections are transported to said bridge fabrication machine agent structure afterbody by beam making field and carry out the feeding beam operation; The completion beam section 12 of constructing that assembling construction has been accomplished is provided with two moving tracks that are parallel laying and supply said fortune beam dolly 24 to move; And the spacing between two said moving tracks is 4625mm, and moving track is accomplished reinforcing bar on beam section 12 bridge floors and carried out temporary fixedly through being reserved in to construct, and transport a beam sections is box girder segment 13 at every turn.

In conjunction with Fig. 5; Actual when carrying out the feeding beam operation; Trolley 15 is sling box girder segment 13 with back trolley 16 and through suspender and suspension rod before utilizing; Said fortune beam dolly 24 is return, preceding trolley 15 and back trolley 16 along afterbody feeding beam cantilever segment 3 inner installed move beam orbit, box girder segment 13 is winched to corresponding design attitude.

In the present embodiment; When accomplishing the assembly unit process of a plurality of said beam sections according to conventional bridge subsection assembling and construction method and on following joist 5, through preceding trolley 15 and back trolley 16 carry out the lifting of a plurality of said beam sections and in the abdomen of bridge fabrication machine agent structure (specifically be joist 5) down put operation.Said bridge fabrication machine agent structure adopts and the same longitudinal grade of circuit; The absolute altitude of each said beam sections is adjusted the adjustment leading screw 10 of joist 5 under the employing and is cooperated the low clearance jack to regulate; When reality is adjusted absolute altitude; Earlier through jack and will be conditioned beam sections according to predefined bearing height and be supported to respective heights, will adjust leading screw 10 afterwards and be adjusted to this bearing height.Thereby, the formwork support platform when said joist 5 down provides interior platform for placing of bridging ventral and the cast of wet seam.

In the present embodiment, said horizontal tray is made up of the platen etc. of walking of longeron 5-1, crossbeam 5-2 and working platform and both sides.Per pass is to be connected by four bearing pins in the middle of the holder crossbeam down, and the two ends of crossbeam 5-2 connect through the otic placode that is connected of lower chord 4-2 in bearing pin and the said lower floor plane frame.Be connected through bolt between said longeron 5-1 and the crossbeam 5-2, longeron 5-1 is provided with adjustment leading screw 10.

Step 2, next hole beam construction, its work progress is following:

Step 201, joist split down: remove the said connector between left side joist and the right side joist described in the joist 5 down; And said left side joist and right side joist rotated to be vertical state by level; This moment, said left side joist and said left side girder section were positioned on the same perpendicular, and right side joist and said right side girder section are positioned on the same perpendicular.

The hole is striden in the reach of step 202, bridge fabrication machine agent structure: through said reach system said bridge fabrication machine agent structure and Overhead travelling crane system integral level mounted thereto are moved forward, the following joist 5 in said bridge fabrication machine agent structure moves to the construction location place of next Kong Liang; The front and back end portion of said next Kong Liang is supported in the front axle beam pier respectively and is positioned on the axle casing pier of said front axle beam pier rear side.

When treating that following joist 5 in the said bridge fabrication machine agent structure moves to the construction location place of next Kong Liang; Two said middle 7 of supporting legs withstand on the said front axle beam pier; And said bridge fabrication machine agent structure is in level; Afterwards front leg strut 6 is moved forward along said horizontal sliding track, and 6 of front leg struts are withstood on adjacent with said front axle beam pier and are positioned on the Bridge Pier 9 of said front axle beam pier front side, accomplish the reach of said bridge fabrication machine agent structure and stride the hole process this moment.

In the present embodiment; Said reach system is dilatory trailer system, and said dilatory trailer system comprises the hoist engine that is fixed on the said bridge fabrication machine agent structure, is fixed on to construct and accomplishes the earth anchor on the beam section 12, the assembly pulley that is connected in the drag rope between said hoist engine and the earth anchor and is made up of movable pulley and quiet pulley.Said movable pulley is fixed on said bridge fabrication machine agent structure rear portion, and quiet pulley is fixed on to construct accomplishes the front end of beam section 12.

In the present embodiment; Move forward and stride before the hole; Carry out the preceding preparation of via hole earlier; Specifically comprise: the wet seam template on the following joist 5 and other instrument etc. have all fixed, and (be about to said left side joist and the right side joist rotates to be vertical state by level) time falls in case joist 5 upsets down; Walking carriage is opened to bridge fabrication machine agent structure afterbody, and installed the rail meter that slips after preventing walking carriage at the back at walking carriage; Utilize the jack jacking to be laid in the haul crossbeam at said bridge fabrication machine agent structure rear portion, through bracket bridge fabrication machine afterbody jack-up and connection are fixed, fall jack slightly after rise, the haul crossbeam is fallen on the balance arm of walking carriage, connects fixing; Drag rope and assembly pulley etc. is in place, and the traction anchoring embedded bar of the fixed pulley of front end and the end of setting a roof beam in place (being said earth anchor) is connected and fixes.

Move forward and stride before the hole, stride rear support leg 8 position that should arrive, back that puts in place, hole, calculate the final in-position of the place ahead wheel of walking carriage, rail meter is installed herein, guarantee that the accurate traveling of bridging function is to design attitude according to reach.Simultaneously, whether the anchoring status of inspection front leg strut 6 is intact, and whether tugboat system is normal.In the present embodiment, said left side joist and said right side joist are from front to back the assembly type joist that three plane joists laying are assemblied to form continuously, and three plane joists are respectively plane joist one, plane joist two and plane joist three from front to back.Reach is striden before the hole, removes between said left side joist and the said right side joist midplane joist one earlier and the assembly between the plane joist two, makes plane joist one and plane joist two be free vertically state.

Reach is striden in the process of hole, and the anchor connection at supporting leg 7 places utilizes front leg strut 6 jacking bridge fabrication machine agent structure leading sections to get final product until the pier top pinner that middle supporting leg 7 leaves the Bridge Pier that supports 9 afterwards in removing earlier; Start dilatory trailer system afterwards, said bridge fabrication machine agent structure begins via hole.After treating that plane joist one is striden Bridge Pier 9 through need, suspend via hole, plane joist one is reverted to the normally closed state through assembly; Afterwards, open plane joist three and be free vertically state; Subsequently, continue via hole and move ahead, before central supporting leg 7 arrives during pinner top, square pier top, middle supporting leg 7 is supported on the pinner and temporary fixed, and supports also anchored through level square pier top pinner assigned address to sliding rail moves to front leg strut 6 before; Then; Front leg strut 6 jackings cause middle supporting leg 7 disengaging pinner end faces can continue via hole slightly and move ahead; Following joist 5 in said bridge fabrication machine agent structure moves to the construction location place of next Kong Liang, when supporting leg 7 arrives (or rear support leg 8 arrives) specified design position in treating, shrinks the hydraulic jack of front leg strut 6; Make supporting leg 7 be supported on the pinner of pier top and anchored; Drop on the beam face of accomplishing beam section 12 of constructing rear support leg 8 and support fixation simultaneously, and through assembly plane joist two and plane joist three are all reverted to the normally closed state, bridge fabrication machine agent structure via hole finishes.

Step 203, next hole beam assembling construction: a plurality of beam sections that adopt Overhead travelling crane system will form said next Kong Liang lift and are transplanted on down on the joist 5 successively; Accomplish the assembly unit process of a plurality of said beam sections afterwards according to conventional bridge subsection assembling and construction method and on following joist 5; Obtain next Kong Liang that assembly unit is accomplished, and the front and back end portion of next Kong Liang that assembly unit is accomplished is supported and fixed on respectively on said front axle beam pier and the axle casing pier.

In the present embodiment, said left side joist and said right side joist include horizontal tray and are laid in a plurality of vertical height adjustment parts on the said horizontal tray from front to back; When carrying out next hole beam assembling construction when carrying out the single hole beam or the first hole beam assembling construction in the step 102 and in the step 203, utilize a plurality of said vertical height adjustment parts that the absolute altitude of a plurality of said beam sections is adjusted.

The above; It only is preferred embodiment of the present invention; Be not that the present invention is done any restriction, every technical spirit changes any simple modification, change and the equivalent structure that above embodiment did according to the present invention, all still belongs in the protection domain of technical scheme of the present invention.

Claims

1. bridge construction is used the web-type bridge fabrication machine under a strong wind and the high empty condition; Comprise the bridge fabrication machine agent structure, be installed in said bridge fabrication machine agent structure top and a plurality of beam sections of construction bridges lift respectively and transfer to being assemblied to form Overhead travelling crane system and drag the reach system that said bridge fabrication machine agent structure integral level moves forward; And be installed in below said bridge fabrication machine agent structure lower front, the middle part from front to back respectively and the front leg strut (6) of lower rear, middle supporting leg (7) and rear support leg (8); Said reach system is laid on the said bridge fabrication machine agent structure; It is characterized in that: said bridge fabrication machine agent structure comprises the main body splicing structure that is the symmetry laying about two; The structure of two said main body splicing structures all identical with size and the two all be vertically to laying, connect as one to the last portion connecting structure of laying through being level between the top of two said main body splicing structures; Said main body splicing structure comprises girder section (1), be laid in the anterior nose girder section (2) of girder section (1) and be laid in the afterbody feeding beam cantilever segment (3) at girder section (1) rear portion; Said nose girder section (2) is positioned at the dead ahead of girder section (1), and afterbody feeding beam cantilever segment (3) is positioned at the dead astern of girder section (1); Said girder section (1), nose girder section (2) and afterbody feeding beam cantilever segment (3) all for by upper chord (4-1), lower chord (4-2) and be installed in upper chord (4-1) and lower chord (4-2) between web member (4-3) be assemblied to form and be vertically to the plane frame of laying; Said girder section (1) for by the upper strata plane frame, be positioned at the middle level plane frame under the plane frame of said upper strata and be positioned at three layers of trussed construction that the lower floor's plane frame under the plane frame of said middle level is formed, said upper strata plane frame, middle level plane frame are all identical with the vertical height of lower floor's plane frame; The bottom flush of the bottom of said nose girder section (2) and said middle level plane frame, and the middle part flush of the bottom of afterbody feeding beam cantilever segment (3) and said middle level plane frame;

Be provided with under the girder section (1) in two said main body splicing structures and be level to the following joist of laying (5); Girder section (1) in two said main body splicing structures is respectively left side girder section and the right side girder section that is positioned at girder section right side, said left side; The transverse width of said joist (5) down is identical with the spacing between girder section right side, said left side and the right side girder section; And following joist (5) is assembled by left side joist and the right side joist that is positioned at joist right side, said left side, said left side joist be the bilateral symmetry laying with the right side joist and the structure of the two all identical with size; Connect through connector between the inside portion of said left side joist and right side joist, and all be connected in hinged way between the bottom of between the bottom of the outside portion of said left side joist and said left side girder section and the outside portion of said right side joist and said right side girder section.

2. use the web-type bridge fabrication machine according to bridge construction under described strong wind of claim 1 and the high empty condition, it is characterized in that: said left side joist and said right side joist include horizontal tray and are laid in a plurality of vertical height adjustment parts on the said horizontal tray from front to back.

3. use the web-type bridge fabrication machine according to bridge construction under claim 1 or 2 described strong wind and the high empty condition; It is characterized in that: said left side joist and said right side joist are from front to back the assembly type joist that a plurality of planes joist of laying is assemblied to form continuously, and connect through assembly between adjacent two the said plane joists in front and back.

4. use the web-type bridge fabrication machine according to bridge construction under described strong wind of claim 1 and the high empty condition; It is characterized in that: the quantity of said front leg strut (6), middle supporting leg (7) and rear support leg (8) is two; Two said front leg struts (6) symmetry respectively are installed in two nose girder section (2) lower front in the said main body splicing structure; And front leg strut (6) can move forward and backward along nose girder section (2); Said nose girder section (2) bottom is provided with the horizontal sliding track that supplies front leg strut (6) to move forward and backward, and said front leg strut (6) comprises and being vertically to telescopic legs of laying one and the slippage wheel that is installed in said telescopic legs one top and can moves forward and backward along said horizontal sliding track; Two said in supporting legs (7) be installed in the middle leg support columns of two nose girder section (2) rearward end belows in the said main body splicing structure for symmetry respectively, and during the leg support column comprises in said the leg upper supporting column be installed in said in the middle leg lower supporting rod of leg upper supporting column below; Two said rear support legs (8) are that symmetry is installed in two back leg support columns that the afterbody feeding beam cantilever segment (3) in the said main body splicing structure is anterior respectively.

5. use the web-type bridge fabrication machine according to bridge construction under described strong wind of claim 4 and the high empty condition, it is characterized in that: the longitudinal length of said joist (5) down is less than the longitudinal length of girder section (1); Institute's construction bridges is single hole beam or multi-hole beam; Each Kong Liang in institute's construction bridges is assemblied to form by a plurality of beam sections; Said each hole beam carries out support fixation through being positioned at its bottom, rear and front end and adjacent two Bridge Pier (9) in front and back respectively, and two said Bridge Pier (9) are respectively front side Bridge Pier and the rear side Bridge Pier that is positioned at said front side Bridge Pier rear side; A plurality of said beam sections among said each Kong Liang include the front end beam sections of front side, the rear end beam sections of rear side and be laid in said front end beam sections from front to back and said rear end beam sections between a plurality of middle parts beam sections; Said down joist (5) is for being positioned between two said Bridge Pier (9) and carrying out the platform for lining of integral assembling to being supported in a hole beam between two said Bridge Pier (9); Spacing between two said Bridge Pier (9) is that D and the said front end beam sections and the longitudinal length of said rear end beam sections that are supported between two said Bridge Pier (9) are d, and the rearward end of the leading section of said joist (5) down and spacing between the Bridge Pier of said front side and time joist (5) and the spacing between the said rear side Bridge Pier are all less than d; The longitudinal length of said girder section (1) and nose girder section (2) is all greater than D, and the longitudinal length of following joist (5) is less than D.

6. use the web-type bridge fabrication machine according to bridge construction under described strong wind of claim 5 and the high empty condition, it is characterized in that: the height of institute's construction bridges is h, and the vertical height of said upper strata plane frame, middle level plane frame and lower floor's plane frame all is not less than h; The longitudinal length of each Kong Liang is L and L=48m ± 5m in institute's construction bridges; The longitudinal length of said girder section (1) is 55m ± 5m; The said longitudinal length of joist (5) down is 45m ± 5m; The longitudinal length of said afterbody feeding beam cantilever segment (3) is 10m ± 2m, and the longitudinal length of nose girder section (2) is 55m ± 5m.

7. utilization such as the said bridge fabrication machine of claim 5 construction technology of carrying out the bridge assembly unit; Institute's construction bridges is single hole beam or multi-hole beam; And each Kong Liang in institute's construction bridges is assemblied to form by a plurality of beam sections; Said each hole beam carries out support fixation through two Bridge Pier (9) that are positioned at its bottom, rear and front end respectively, it is characterized in that this technology may further comprise the steps:

The first hole beam in step 1, assembling construction single hole beam or the assembling construction multi-hole beam: two Bridge Pier (9) that construction single hole beam or the first hole beam are supported are respectively between Bridge Pier one and the Bridge Pier two; Said Bridge Pier two and said Bridge Pier one adjacent and its be positioned at said Bridge Pier one front side; Said Bridge Pier one is an abutment one (11), the work progress of the single hole beam of constructing or the first hole beam following:

The reach of step 101, bridge fabrication machine puts in place: through said reach system said bridge fabrication machine agent structure integral level is moved forward, the following joist (5) in said bridge fabrication machine agent structure moves between abutment one (11) and the said Bridge Pier two; Afterwards, the inner Overhead travelling crane system of installing of said bridge fabrication machine agent structure that puts in place in reach;

Step 102, single hole beam or the first hole beam assembling construction: a plurality of beam sections that adopt said Overhead travelling crane system will form the said single hole beam or the first hole beam lift successively and are transplanted on down on the joist (5); Go up the assembly unit process of accomplishing a plurality of said beam sections according to conventional bridge subsection assembling and construction method and at following joist (5) afterwards; Obtain the single hole beam or the first hole beam that assembly unit is accomplished, and the single hole beam of assembly unit completion or the front and back end portion of the first hole beam are supported and fixed on respectively on said Bridge Pier two and the abutment one (11);

Step 2, next hole beam construction, its work progress is following:

Step 201, joist split down: remove the said connector between left side joist and the right side joist described in the joist (5) down; And said left side joist and right side joist rotated to be vertical state by level; This moment, said left side joist and said left side girder section were positioned on the same perpendicular, and right side joist and said right side girder section are positioned on the same perpendicular;

The hole is striden in the reach of step 202, bridge fabrication machine agent structure: through said reach system said bridge fabrication machine agent structure and Overhead travelling crane system integral level mounted thereto are moved forward, the following joist (5) in said bridge fabrication machine agent structure moves to the construction location place of next Kong Liang; The front and back end portion of said next Kong Liang is supported in the front axle beam pier respectively and is positioned on the axle casing pier of said front axle beam pier rear side;

When treating that following joist (5) in the said bridge fabrication machine agent structure moves to the construction location place of next Kong Liang; Two said middle supporting legs (7) prop up and withstand on the said front axle beam pier; And said bridge fabrication machine agent structure is in level; Afterwards front leg strut (6) is moved forward along said horizontal sliding track, and front leg strut (6) is withstood on adjacent with said front axle beam pier and is positioned on the Bridge Pier (9) of said front axle beam pier front side, accomplish the reach of said bridge fabrication machine agent structure and stride the hole process this moment;

Step 203, next hole beam assembling construction: a plurality of beam sections that adopt Overhead travelling crane system will form said next Kong Liang lift successively and are transplanted on down on the joist (5); Go up the assembly unit process of accomplishing a plurality of said beam sections according to conventional bridge subsection assembling and construction method and at following joist (5) afterwards; Obtain next Kong Liang that assembly unit is accomplished, and the front and back end portion of next Kong Liang that assembly unit is accomplished is supported and fixed on respectively on said front axle beam pier and the axle casing pier;

8. according to the described construction technology of claim 7, it is characterized in that: when through said reach system said bridge fabrication machine agent structure integral level being moved forward in the step 101, its process that moves forward is following:

Step 1011, the assembly unit of bridge fabrication machine overhead structure: on the smooth vacant lot in abutment one (11) dead astern; Said upper strata plane frame and middle level plane frame in nose girder section (2) in two said main body splicing structures, afterbody feeding beam cantilever segment (3), the girder section (1) and the said portion connecting structure of going up that is connected between two said main body splicing structure tops are carried out assembly unit, and obtain the bridge fabrication machine overhead structure that assembly unit is accomplished; After said bridge fabrication machine overhead structure assembly unit is accomplished; Two said front leg struts (6) are installed in two said main body splicing structures nose girder section (2) lower front that assembly unit is accomplished respectively; And the bottom of front leg strut (6) propped up withstand on the abutment one (11); Simultaneously with two said in the middle leg upper supporting column of supporting legs (7) be installed in two said main body splicing structures nose girder section (2) the rearward end below that assembly unit is accomplished respectively, and two said rear support legs (8) are installed in afterbody feeding beam cantilever segment (3) front portion in two said main body splicing structures respectively;

Step 1012, bridge fabrication machine overhead structure are tentatively dilatory to move ahead: before preliminary dilatory the moving ahead; Also need adopt the afterbody bracing or strutting arrangement that the afterbody of the overhead structure of bridge fabrication machine described in the step 1011 is propped up overhead; Simultaneously with the said telescopic legs in the front leg strut described in the step 1011 (6) a jack-up upwards, and make said bridge fabrication machine overhead structure be in level; Afterwards, with the translation forward of said bridge fabrication machine overhead structure, nose girder section (2) rearward end in said bridge fabrication machine overhead structure is positioned at till abutment one (11) top through said reach system;

Step 1013, middle leg upper supporting column are interim to be supported and the front leg strut reach: the said telescopic legs one in the front leg strut described in the step 1012 (6) is shunk downwards, in this moment step 1011 in installation said leg upper supporting column bottom prop up and withstand on the abutment one (11); Afterwards, set horizontal sliding track moves forward to said Bridge Pier two tops along nose girder section (2) bottom with said front leg strut (6), and front leg strut (6) is withstood on the said Bridge Pier two;

Step 1014, bridge fabrication machine overhead structure are further dilatory to move ahead and the assembly unit of bridge fabrication machine lower body part structure: earlier with the said telescopic legs in the front leg strut described in the step 1013 (6) a jack-up and make said bridge fabrication machine overhead structure be in level upwards, the middle leg upper supporting column bottom described in this moment step 1013 breaks away from abutment one (11); Afterwards, through said reach system said bridge fabrication machine overhead structure is continued translation forward, nose girder section (2) rearward end in said bridge fabrication machine overhead structure is positioned at till said Bridge Pier two tops;

And said bridge fabrication machine overhead structure is continued in the translation process forward through said reach system; Below the middle leg upper supporting column described in the step 1013 assembly unit said in leg lower supporting rod and obtain the middle supporting leg (7) that assembly unit is accomplished, assembling bridge manufacturing machine lower body part structure and obtain the said bridge fabrication machine agent structure that assembly unit is accomplished on said bridge fabrication machine overhead structure simultaneously; Said bridge fabrication machine lower body part structure comprises the lower floor's plane frame and the following joist (5) that is laid under two said main body splicing structure middle girder sections (1) in the girder section (1);

When treating that nose girder section (2) rearward end in the said bridge fabrication machine overhead structure is positioned at said Bridge Pier two tops; Said telescopic legs one in the front leg strut (6) is shunk downwards; Middle supporting leg (7) bottom that assembly unit this moment is accomplished withstands on the said Bridge Pier two and said bridge fabrication machine overhead structure is in level; Afterwards front leg strut (6) is moved forward along said horizontal sliding track; And front leg strut (6) withstood on the Bridge Pier three, accomplish the assembly unit and the dilatory process that moves ahead of said bridge fabrication machine agent structure this moment, and joist (5) is positioned between abutment one (11) and the said Bridge Pier two down; Said Bridge Pier three is for being positioned at said Bridge Pier two front sides and the Bridge Pier (9) adjacent with said Bridge Pier two.

9. according to the described construction technology of claim 8; It is characterized in that: the bridge fabrication machine overhead structure is further in the tentatively dilatory process neutralization procedure 1014 that moves ahead of bridge fabrication machine overhead structure in the step 1012 draws in the process that moves ahead, and said afterbody bracing or strutting arrangement moves forward with said bridge fabrication machine overhead structure along the smooth vacant lot in abutment one (11) dead astern synchronously; The reach of bridge fabrication machine agent structure is striden in the process of hole in the step 202, and said afterbody bracing or strutting arrangement is accomplished beam section (12) along the construction that is positioned at said axle casing pier dead astern and moved forward synchronously with said bridge fabrication machine overhead structure; When nose girder section (2) rearward end in the said bridge fabrication machine overhead structure was positioned at said Bridge Pier two tops, two said rear support legs (8) propped up and withstand on the abutment one (11) in the step 1014; When the following joist (5) in the said bridge fabrication machine agent structure moved to the construction location place of next Kong Liang, two said rear support legs (8) propped up and withstand on the said axle casing pier in the step 202.

10. according to claim 7 or 8 described construction technologies, it is characterized in that: the said left side joist and the said right side joist of joist (5) include horizontal tray and are laid in a plurality of vertical height adjustment parts on the said horizontal tray from front to back down in the said bridge fabrication machine agent structure; When carrying out next hole beam assembling construction when carrying out the single hole beam or the first hole beam assembling construction in the step 102 and in the step 203, utilize a plurality of said vertical height adjustment parts that the absolute altitude of a plurality of said beam sections is adjusted.