CN113005900A - Inverted protection shed and mounting and dismounting method thereof - Google Patents
Inverted protection shed and mounting and dismounting method thereof Download PDFInfo
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- CN113005900A CN113005900A CN201911328640.4A CN201911328640A CN113005900A CN 113005900 A CN113005900 A CN 113005900A CN 201911328640 A CN201911328640 A CN 201911328640A CN 113005900 A CN113005900 A CN 113005900A
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- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 4
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- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/10—Railings; Protectors against smoke or gases, e.g. of locomotives; Maintenance travellers; Fastening of pipes or cables to bridges
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Abstract
The invention relates to the technical field of a protective shed for cross-railway construction, in particular to an inverted protective shed and an installation and dismantling method thereof; the inverted protection shed adopts a prefabricated box girder as a supporting system, and seals a wet joint of the prefabricated box girder and the bottom of a diaphragm plate of the prefabricated box girder; the inverted protection shed adopts phi 32 ribbed steel bars as a protection shed beam, a protection shed 6mm steel plate is laid on the protection shed beam, the protection shed 6mm steel plate is welded with the protection shed beam, and electricity-proof glue is fully laid above the protection shed 6mm steel plate; the diaphragm plate department of prefabricated case roof beam sets up the end pocket, the flange board department of prefabricated case roof beam sets up the preformed hole, the pole setting is installed to the preformed hole, has solved effectively that the blockade of crossing iron construction railway is under construction short, the optical cable moves changes the problem that work load is big, the period is long, with high costs.
Description
Technical Field
The invention relates to the technical field of railway-crossing construction protection sheds, in particular to an inverted protection shed and an installation and dismantling method thereof.
Background
The highway and railway separation bridge span railway part is provided with a portal protection shed according to the requirements of railway departments and considering the problems that sundries such as steel bar heads, cement paste and the like fall into the railway and the like in the construction process, the portal protection shed is mainly composed of a pile foundation, a bar foundation, a steel pipe upright post and a ceiling and is positioned in a railway isolation fence, the railway needs to be blocked and constructed, the blocking plan procedure is complex, the blocking construction time is limited, only 3 hours are needed every day, the normal operation of the train is considered, only 'skylight points' can be used for blocking construction, the construction period is extremely short, the construction period is prolonged, the construction period requirement cannot be met, the main reason that the protection shed foundation is positioned at the positions of the existing railway facilities such as railway communication optical cables, cable positions, drainage ditches and the like, the transfer workload is large, the influence on the railway is great, and the construction period is, the method can not meet the requirement of the construction period, has complex procedures, high cost and complicated procedures, greatly influences the railway by moving and changing the railway facilities, relates to more railway departments, and has more risks.
Disclosure of Invention
Aiming at the defects of the existing portal type protective shed, the invention provides an inverted protective shed, which effectively solves the problems of short railway blockade construction, large workload of optical cable migration and transformation, long construction period and high cost in the cross-rail construction.
In order to achieve the purpose, the invention provides the following technical scheme:
an inverted protection shed adopts a prefabricated box girder as a supporting system, and seals a wet joint of the prefabricated box girder and the bottom of a diaphragm plate of the prefabricated box girder;
the inverted protection shed adopts phi 32 ribbed steel bars as a protection shed beam, a protection shed 6mm steel plate is laid on the protection shed beam, and the protection shed 6mm steel plate is welded with the protection shed beam;
fully paving electricity-proof glue above a 6mm steel plate of the protection shed;
the diaphragm department of prefabricated case roof beam sets up the end pocket, the flange board department of prefabricated case roof beam sets up the preformed hole, the pole setting is installed to the preformed hole.
Furthermore, the top and the bottom of the precast beam box respectively adopt a first I14b I-steel and a second I14b I-steel as cross beams, and the first I14b I-steel and the second I14b I-steel are connected with the vertical rods through bolts.
Furthermore, the vertical rods are made of phi 32 finish-rolled deformed steel bars.
Furthermore, the protective shed cross beams are arranged one by one at intervals of 1 meter, and when the prefabricated box girder is prefabricated, stainless steel pipes are pre-buried in a web plate of the box girder in advance.
The mounting method of the inverted protection shed is characterized in that: the method comprises the following steps:
s1, early preparation;
construction preparation: a blockade construction plan is reported to a railway department in advance, construction is carried out strictly according to the blockade time, a blockade technology safety meeting is called before the blockade construction, and organization and arrangement of people on the same day are clear; blocking the station track, construction operation content, construction order and safety notice; when entering the barrier inner lock construction personnel, the personnel must wear yellow work clothes or reflective belts and wear work plates, and enter a protection place half an hour before construction to prepare;
preparing materials: materials such as steel plates, I-shaped steel, finish-rolled threads, electricity-proof glue and the like used for construction are transported to the site one day in advance, and the quality, specification, type and quantity of the materials are checked;
preparing equipment: the blocking time is limited, the equipment such as a beam transporting vehicle, a crane and the like must be maintained and repaired before construction, and the equipment is delivered to the site half an hour in advance;
s2, mounting the precast box girder embedded steel pipes;
web plate embedded pipe: steel pipes are reserved when the box body is prefabricated and used as mounting holes of a beam of the protective shed, and the reserved holes are arranged at intervals along the direction of the bridge and are arranged above the web plate;
pre-burying holes on the top plate:
a protective shed is required to be arranged at the transverse partition plate of the box girder, the protective shed at the transverse partition plate utilizes beam-top I-shaped steel to fix finish-rolled deformed steel bars as vertical rods, the bottoms of the finish-rolled deformed steel bars are fixed with the I-shaped steel bars in a bolt connection mode to serve as cross beams, holes need to be pre-buried at the position of the transverse partition plate in advance, and 4 holes are pre-buried at each transverse partition plate;
s3, mounting a beam and a side beam protection shed;
mounting a beam and a side beam protection shed in a precast yard in advance, and fixing the beam and the side beam protection shed firmly after the mounting is finished;
s4, mounting a diaphragm protective shed;
erecting the box girder according to the sequence of the outer girder and the middle girder, and installing a diaphragm protection shed after the outer girder and the middle girder are erected; after the I-shaped steel of the bottom plate is installed, a 6mm steel plate of the protection shed is installed, the 6mm steel plate of the protection shed is firmly welded with the I-shaped steel, and the top of the steel plate is fully paved with electricity-proof glue;
s5, mounting a middle beam protection shed;
the steel plate installation between the center sill is carried out after the installation of the protective shed at the transverse partition plate is completed, the box girder embedded hole steel bars are welded into a whole in a rib welding mode, the steel plate is installed after the welding is completed, the two steel plates are spliced into a whole, and the steel plate and the cross beam are welded firmly.
Further, in the step S2, the steel pipe is a galvanized steel pipe with a diameter of 800mm, and the prepared holes are vertically arranged along the box girder.
Furthermore, the pre-buried interval of diaphragm plate is unanimous with the steel sheet preformed hole.
Further, in the step S4, firstly, installing finish rolled deformed steel bars with the diameter of 32mm in the pre-buried holes of the top plate, and connecting the finish rolled deformed steel bars with I14I-shaped steel bars by bolts; and after the installation is finished, installing a bottom plate cross beam, wherein the bottom plate cross beam is made of I14A I-shaped steel, the I-shaped steel is provided with a bolt hole in advance and is connected with finish-rolled deformed steel bars through bolts.
Further, in the step S5, the two steel plates are connected by spot welding, a part of the gap is processed by an electricity-proof tape after the steel plates are installed, and electricity-proof glue is fully laid after the steel plates are installed.
The method for dismantling the inverted protection shed is characterized by comprising the following steps: the method comprises the following steps:
s1: construction preparation;
a blockade construction plan is reported to a railway department in advance, and construction is carried out strictly according to the blockade time; before the construction of the sealing-off, the sealing-off technology is called for meeting safely, and the organization and arrangement of people in the same day are determined; blocking the station track, construction operation content, construction order and safety notice; when entering the barrier inner lock construction personnel, the personnel must wear yellow work clothes or reflective belts and wear work plates, and enter a protection place half an hour before construction to prepare;
the bridge inspection vehicle is adopted for dismantling, left and right operation is carried out, two bridge inspection vehicles are prepared in advance, the parking positions of the bridge inspection vehicles are considered in advance, marking is carried out, and operation is carried out at the highest speed; preparing 1 50-ton crane for hoisting materials and small materials such as steel wire ropes, bamboo plywood and the like;
s2, dismantling the diaphragm protection shed;
protecting the steel rail within the dismantling range, fully paving a bamboo plywood and covering color stripe cloth; the bridge inspection vehicle is in place, the bridge inspection vehicle is commanded by a special person, demolishing personnel use the bridge inspection vehicle platform to operate, all operating personnel wear safety belts, safety helmets and other protective articles, the steel wire rope and the steel plate preformed hole are firmly bound, the steel wire rope and the cross beam are fixed, then the bottom plate bolt and the wage steel are dismantled, the steel wire rope is manually pulled to slowly descend the steel plate, the personnel in the railway timely respond, and sundries such as the steel plate and the I-steel are moved out of the railway.
S3, dismantling the wet joint protection shed;
the bridge inspection vehicle is utilized to remove the steel plate, the herringbone crawling ladder is erected in the bridge inspection vehicle to remove the steel plate, special persons are arranged on two sides of the crawling ladder to take care of the steel plate, the steel wire rope and the steel plate preformed hole are firmly bound, the steel wire rope and the cross beam are fixed, then the bottom plate bolt and the I-shaped steel are removed, the steel wire rope is manually pulled to slowly descend, personnel in the railway timely take over the steel plate, the I-shaped steel and other sundries are moved out of the railway, and the protection shed is sequentially removed according to the method.
S4, plugging the pre-buried hole
And removing sundries such as steel bars and the like in the embedded holes, plugging the embedded holes by adopting high-strength epoxy resin mortar, and vibrating and compacting.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention provides an inverted protection shed, which adopts the technical scheme of the inverted protection shed, reduces the influence on the existing railway, is convenient and fast to construct, does not need to transfer communication optical cables, contact networks, drainage ditches and other railway facilities, has simple construction procedures, meets the railway passing requirements and the construction period requirements, effectively saves the cost, reduces the railway construction procedures, and has more butt-joint departments and more approval procedures for optical cable transfer, and the inverted protection shed does not need to transfer the existing facilities and does not need to transfer the transfer procedures.
2. According to the invention, the inverted protection shed is adopted, so that the construction time is shortened, the requirement of the construction period is met, the estimated construction period of the portal protection shed is 116 days, the inverted protection shed only needs 20 days, and the construction period is effectively shortened by 96 days.
3. The inverted protection shed is adopted, so that the cost is saved, the cost of the original protection shed for generating the pile foundation, the bar foundation, the steel pipe upright post, the railway facility transfer and modification and the like is 215.2 ten thousand yuan, the actual cost of the inverted protection shed is 42 ten thousand yuan, and the cost is saved by about 171.2 ten thousand yuan.
Drawings
FIG. 1 is a cross-sectional view of a wet seam of an inverted shelter according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a diaphragm of the inverted protection shed according to the embodiment of the present invention;
FIG. 3 is a plan view of an inverted protection shed according to an embodiment of the present invention installed on a conventional railway;
fig. 4 is a schematic structural view of a box girder embedded hole of an inverted protection shed according to an embodiment of the present invention;
FIG. 5 is a process flow diagram of a method of installing the inverted protective shed provided in FIG. 1;
FIG. 6 is a process flow diagram of a method for removing the inverted protection shed provided in FIG. 1;
note: 1-protective shed beam, 2-box beam embedded galvanized steel pipe, 3-protective shed 6mm steel plate, 4-electricity-proof glue, 5-prefabricated box beam, 6-adhesive tape, 71-first I14b I-steel, 72-second I14b I-steel, 8-bottom plate beam, 9-phi 32 finish-rolled deformed steel bar, 10-gasket, 11-phi 32 nut, 12-drainage ditch, 13-railway track central line, 14-contact net, 15-railway fence and 16-embedded hole.
Detailed Description
The invention is described in detail below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "bottom", "inner", and the like, as used herein, refer to an orientation or positional relationship based on that shown in fig. 1-6, which is for convenience and simplicity of description, and does not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, is not to be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In order to more clearly and specifically describe the inverted protection shed provided by the embodiment of the present invention, the following description will be made with reference to specific embodiments.
Example 1
As shown in fig. 1 to 3, the inverted protection shed provided by this embodiment uses the prefabricated box girder 5 as a supporting system, and seals the wet joint of the prefabricated box girder 5 and the bottom of the diaphragm of the prefabricated box girder 5;
the inverted protection shed adopts phi 32 ribbed steel bars as a protection shed beam 1, a protection shed 6mm steel plate 3 is laid on the protection shed beam 1, and the protection shed 6mm steel plate 3 is welded with the protection shed beam 1;
fully paving an electricity-proof adhesive 4 above the 6mm steel plate 3 of the protection shed;
the diaphragm department of prefabricated case roof beam 5 sets up the end pocket, the flange board department of prefabricated case roof beam 5 sets up the preformed hole, the pole setting is installed to the preformed hole.
The top and the bottom of the precast beam box 5 respectively adopt a first I14b I-steel 71 and a second I14b 72I-steel as cross beams, and the first I14b I-steel 71 and the second I14b I-steel 72 are connected with the vertical rods through bolts.
The upright rods are made of phi 32 finish-rolled deformed steel bars 9, and gaskets 10 and phi 32 nuts are further arranged at the positions, so that the installation is more tight;
the protective shed beam 1 is arranged at intervals of 1 meter, and when the prefabricated box girder 5 is prefabricated, stainless steel pipes are pre-buried in a web plate of the box girder in advance.
As shown in fig. 4, the method for installing an inverted protection shed in this embodiment is characterized in that: the method comprises the following steps:
s1, early preparation;
construction preparation: a blockade construction plan is reported to a railway department in advance, construction is carried out strictly according to the blockade time, a blockade technology safety meeting is called before the blockade construction, and organization and arrangement of people on the same day are clear; blocking the station track, construction operation content, construction order and safety notice; as shown in fig. 3, 12 is a drainage ditch, 13 is a central line of a railway track, 14 is a contact net, 5 is a prefabricated box girder, and when the prefabricated box girder enters a barrier, a blocking constructor needs to wear yellow work clothes or a reflective tape and wear a work plate and enters a protection place half an hour before construction to prepare;
preparing materials: materials such as steel plates, I-shaped steel, finish-rolled threads, electricity-proof glue and the like used for construction are transported to the site one day in advance, and the quality, specification, type and quantity of the materials are checked;
preparing equipment: the blocking time is limited, the equipment such as a beam transporting vehicle, a crane and the like must be maintained and repaired before construction, and the equipment is delivered to the site half an hour in advance;
s2, mounting the precast box girder embedded steel pipes;
web plate embedded pipe: and reserving a phi 800mm galvanized steel pipe 2 as a mounting hole of a beam of the protective shed when the box body is prefabricated, wherein eight prefabricated box beams with the length of 40 meters are 15 spans, and the beam height is 2.2 meters and is a 78-degree diagonal box beam. According to the requirement of railway department, a protective shed needs to be built in the range of the railway fence 15, and the protective shed is obtained through on-site actual measurement: the distance between the north side fence and the small-distance beam end is 3 meters, the distance between the south side fence and the large-distance beam end is 5 meters, and each box beam needs to be provided with a pre-buried hole of 32 meters; preformed holes are arranged at intervals along the bridge direction, the preformed holes are arranged along the bridge direction every 1 m, are arranged above the web plate and are 1.6 m away from the bottom plate, and 33 box girders are embedded in each truss;
pre-burying holes on the top plate:
a protective shed needs to be arranged at the transverse partition plate of the box girder, so that sundries such as steel bars, concrete slag and the like can be prevented from falling into a railway in the construction of the transverse partition plate. The protective shed at the transverse partition plate uses I-shaped steel on the top of a beam to fix finish rolling deformed steel bars 9 as vertical rods, the bottoms of the finish rolling threads are fixed with the I-shaped steel in a bolt connection mode to be used as a beam, holes 16 need to be pre-buried at the position of the transverse partition plate in advance, and 4 holes are pre-buried at each transverse partition plate;
s3, mounting a beam and a side beam protection shed;
the installation of protection canopy needs to carry out blockade construction, and the blockade time is short, only 3 hours, and is unfavorable for the installation after the box girder erects the completion, consequently, installs crossbeam, boundary beam protection canopy at the precast yard in advance, and it is firm to install after the completion with the roof beam body is fixed, avoids the hoist and mount in-process to scatter.
S4, mounting a diaphragm protective shed;
erecting the box girder according to the sequence of the outer girder and the middle girder, and installing a diaphragm protection shed after the outer girder and the middle girder are erected; after the I-shaped steel of the bottom plate is installed, a 6mm steel plate 3 of a protective shed is installed, the 6mm steel plate 3 of the protective shed is firmly welded with the I-shaped steel, and electricity-proof glue 4 is fully paved on the top of the steel plate;
s5, mounting a middle beam protection shed;
the steel sheet installation between the well roof beam is carried out after the installation of cross slab department protection canopy, welds into whole with the box girder buried hole reinforcing bar adoption group strip welding's form earlier, and the installation steel sheet after the welding is accomplished, because of the buried hole is less (only 0.4 meter) from the roof distance, the unable installation of steel sheet consequently adopts two steel sheets to splice into holistic mode, steel sheet overlap joint 0.2 meter, and the steel sheet is firm with the crossbeam welding.
In the step S2, the prepared holes are vertically arranged along the box girder.
The pre-buried interval of cross slab is unanimous with the steel sheet preformed hole.
In the step S4, firstly, installing phi 32mm finish-rolled deformed steel bars 9 in the pre-buried holes of the top plate, and connecting the I14I-shaped steel bars by bolts; and after the installation, the bottom plate cross beam 8 is installed, the bottom plate cross beam 8 adopts I14A I-shaped steel, the I-shaped steel is provided with bolt holes in advance and is connected with the finish-rolled deformed steel bar 9 through bolts.
In the step S5, the two steel plates are connected in a spot welding mode, after the steel plates are installed, a part of gaps are processed by adhesive stopping tapes 6, no gap between the steel plates and the beam body is ensured, and after the steel plates are installed, the electric-proof adhesive is fully paved.
As shown in fig. 5, the method for removing the inverted protection shed in this embodiment is characterized in that: the method comprises the following steps:
s1: construction preparation;
a blockade construction plan is reported to a railway department in advance, and construction is carried out strictly according to the blockade time; before the construction of the sealing-off, the sealing-off technology is called for meeting safely, and the organization and arrangement of people in the same day are determined; blocking the station track, construction operation content, construction order and safety notice; when entering the barrier inner lock construction personnel, the personnel must wear yellow work clothes or reflective belts and wear work plates, and enter a protection place half an hour before construction to prepare;
the method has the advantages that the railway blocking time is short, a support frame erection dismantling scheme cannot be adopted, after research, the bridge inspection vehicle is determined to be adopted for dismantling, left and right operation is carried out, two bridge inspection vehicles are prepared in advance, the parking positions of the bridge inspection vehicles are considered in advance, marks are made, and operation is carried out at the fastest speed; preparing 1 50-ton crane for hoisting materials and small materials such as steel wire ropes, bamboo plywood and the like;
s2, dismantling the diaphragm protection shed;
protecting the steel rail within the dismantling range, fully paving a bamboo plywood and covering color stripe cloth; the bridge inspection vehicle is in place and must be commanded by a specially-assigned person so as to avoid affecting train passing due to the fact that the bridge inspection vehicle touches the existing contact network 14 of the railway. Demolishing personnel utilize the bridge to examine car platform and carry out the operation, and all operating personnel must wear protective articles such as safety belt, safety helmet, with wire rope and steel sheet preformed hole ligature firm to fix wire rope and crossbeam, demolish bottom plate bolt again, the wage steel, reuse manual work hold wire rope with the steel sheet slowly descend, personnel in the railway in time meet, move out debris such as steel sheet, I-steel out the railway.
S3, dismantling the wet joint protection shed;
the bridge inspection vehicle is utilized for dismantling, the beam is higher (1.6 meters) from the bottom of the beam and cannot be directly dismantled, a herringbone ladder stand needs to be erected in the bridge inspection vehicle for dismantling, special persons are arranged on two sides of the ladder stand, the steel wire rope and the steel plate preformed hole are firmly bound, the steel wire rope and the beam are fixed, then a bottom plate bolt and I-shaped steel are dismantled, the steel wire rope is manually pulled to slowly descend the steel plate, personnel in a railway timely meet the steel wire rope, sundries such as the steel plate and the I-shaped steel are moved out of the railway, and the protective shed is dismantled in sequence according to the method.
S4, plugging the pre-buried hole
And removing sundries such as steel bars and the like in the embedded holes, plugging the embedded holes by adopting high-strength epoxy resin mortar, and vibrating and compacting.
Claims (10)
1. The utility model provides an inverted protection canopy which characterized in that: the inverted protection shed adopts a prefabricated box girder as a supporting system, and seals a wet joint of the prefabricated box girder and the bottom of a diaphragm plate of the prefabricated box girder;
the inverted protection shed adopts phi 32 ribbed steel bars as a protection shed beam, a protection shed 6mm steel plate is laid on the protection shed beam, and the protection shed 6mm steel plate is welded with the protection shed beam;
fully paving electricity-proof glue above a 6mm steel plate of the protection shed;
the diaphragm department of prefabricated case roof beam sets up the end pocket, the flange board department of prefabricated case roof beam sets up the preformed hole, the pole setting is installed to the preformed hole.
2. The inverted protective shed according to claim 1, wherein: the top and the bottom of the precast beam box respectively adopt a first I14b I-steel and a second I14b I-steel as cross beams, and the first I14b I-steel and the second I14b I-steel are connected with the vertical rods through bolts.
3. The inverted protective shed according to claim 2, wherein: the vertical rod is made of phi 32 finish-rolled deformed steel bar.
4. The inverted protective shed according to claim 1, wherein: the protective shed cross beams are arranged one by one at intervals of 1 meter, and when the prefabricated box girder is prefabricated, stainless steel pipes are pre-embedded in a web plate of the box girder in advance.
5. A method of installing an inverted shelter as claimed in any one of claims 1 to 4, wherein: the method comprises the following steps:
s1, early preparation;
construction preparation: a blockade construction plan is reported to a railway department in advance, construction is carried out strictly according to the blockade time, a blockade technology safety meeting is called before the blockade construction, and organization and arrangement of people on the same day are clear; blocking the station track, construction operation content, construction order and safety notice; when entering the barrier inner lock construction personnel, the personnel must wear yellow work clothes or reflective belts and wear work plates, and enter a protection place half an hour before construction to prepare;
preparing materials: materials such as steel plates, I-shaped steel, finish-rolled threads, electricity-proof glue and the like used for construction are transported to the site one day in advance, and the quality, specification, type and quantity of the materials are checked;
preparing equipment: the blocking time is limited, the equipment such as a beam transporting vehicle, a crane and the like must be maintained and repaired before construction, and the equipment is delivered to the site half an hour in advance;
s2, mounting the precast box girder embedded steel pipes;
web plate embedded pipe: steel pipes are reserved when the box body is prefabricated and used as mounting holes of a beam of the protective shed, and the reserved holes are arranged at intervals along the direction of the bridge and are arranged above the web plate;
pre-burying holes on the top plate:
a protective shed is required to be arranged at the transverse partition plate of the box girder, the protective shed at the transverse partition plate utilizes beam-top I-shaped steel to fix finish-rolled deformed steel bars as vertical rods, the bottoms of the finish-rolled deformed steel bars are fixed with the I-shaped steel bars in a bolt connection mode to serve as cross beams, holes need to be pre-buried at the position of the transverse partition plate in advance, and 4 holes are pre-buried at each transverse partition plate;
s3, mounting a beam and a side beam protection shed;
mounting a beam and a side beam protection shed in a precast yard in advance, and fixing the beam and the side beam protection shed firmly after the mounting is finished;
s4, mounting a diaphragm protective shed;
erecting the box girder according to the sequence of the outer girder and the middle girder, and installing a diaphragm protection shed after the outer girder and the middle girder are erected; after the I-shaped steel of the bottom plate is installed, a 6mm steel plate of the protection shed is installed, the 6mm steel plate of the protection shed is firmly welded with the I-shaped steel, and the top of the steel plate is fully paved with electricity-proof glue;
s5, mounting a middle beam protection shed;
the steel plate installation between the center sill is carried out after the installation of the protective shed at the transverse partition plate is completed, the box girder embedded hole steel bars are welded into a whole in a rib welding mode, the steel plate is installed after the welding is completed, the two steel plates are spliced into a whole, and the steel plate and the cross beam are welded firmly.
6. The method for installing an inverted protection shed according to claim 5, wherein: in the step S2, the steel pipe is a phi 800mm galvanized steel pipe, and the preformed holes are vertically arranged along the box girder.
7. The method for installing an inverted protection shed according to claim 5, wherein: the pre-buried interval of cross slab is unanimous with the steel sheet preformed hole.
8. The method for installing an inverted protection shed according to claim 5, wherein: in the step S4, firstly, mounting phi 32mm finish rolling deformed steel bars in the pre-buried holes of the top plate, and connecting the I14I-shaped steel bars by bolts; and after the installation is finished, installing a bottom plate cross beam, wherein the bottom plate cross beam is made of I14A I-shaped steel, the I-shaped steel is provided with a bolt hole in advance and is connected with finish-rolled deformed steel bars through bolts.
9. The method for installing an inverted protection shed according to claim 5, wherein: in the step S5, the two steel plates are connected by spot welding, a part of the gap is treated by an electricity-proof tape after the steel plates are installed, and electricity-proof glue is fully spread after the steel plates are installed.
10. A method of dismantling an inverted shelter as claimed in any one of claims 1 to 4, wherein: the method comprises the following steps:
s1: construction preparation;
a blockade construction plan is reported to a railway department in advance, and construction is carried out strictly according to the blockade time; before the construction of the sealing-off, the sealing-off technology is called for meeting safely, and the organization and arrangement of people in the same day are determined; blocking the station track, construction operation content, construction order and safety notice; when entering the barrier inner lock construction personnel, the personnel must wear yellow work clothes or reflective belts and wear work plates, and enter a protection place half an hour before construction to prepare;
the bridge inspection vehicle is adopted for dismantling, left and right operation is carried out, two bridge inspection vehicles are prepared in advance, the parking positions of the bridge inspection vehicles are considered in advance, marking is carried out, and operation is carried out at the highest speed; preparing 1 50-ton crane for hoisting materials and small materials such as steel wire ropes, bamboo plywood and the like;
s2, dismantling the diaphragm protection shed;
protecting the steel rail within the dismantling range, fully paving a bamboo plywood and covering color stripe cloth; the bridge inspection vehicle is in place, the bridge inspection vehicle is commanded by a special person, demolishing personnel use the bridge inspection vehicle platform to operate, all operating personnel wear safety belts, safety helmets and other protective articles, the steel wire rope and the steel plate preformed hole are firmly bound, the steel wire rope and the cross beam are fixed, then the bottom plate bolt and the wage steel are dismantled, the steel wire rope is manually pulled to slowly descend the steel plate, the personnel in the railway timely respond, and sundries such as the steel plate and the I-steel are moved out of the railway.
S3, dismantling the wet joint protection shed;
the bridge inspection vehicle is utilized to remove the steel plate, the herringbone crawling ladder is erected in the bridge inspection vehicle to remove the steel plate, special persons are arranged on two sides of the crawling ladder to take care of the steel plate, the steel wire rope and the steel plate preformed hole are firmly bound, the steel wire rope and the cross beam are fixed, then the bottom plate bolt and the I-shaped steel are removed, the steel wire rope is manually pulled to slowly descend, personnel in the railway timely take over the steel plate, the I-shaped steel and other sundries are moved out of the railway, and the protection shed is sequentially removed according to the method.
S4, plugging the pre-buried hole
And removing sundries such as steel bars and the like in the embedded holes, plugging the embedded holes by adopting high-strength epoxy resin mortar, and vibrating and compacting.
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