CN103741657A - Construction method of large multifunctional over-water construction platform - Google Patents
Construction method of large multifunctional over-water construction platform Download PDFInfo
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- CN103741657A CN103741657A CN201310736699.3A CN201310736699A CN103741657A CN 103741657 A CN103741657 A CN 103741657A CN 201310736699 A CN201310736699 A CN 201310736699A CN 103741657 A CN103741657 A CN 103741657A
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Abstract
A construction method of a large multifunctional over-water construction platform comprises the following steps of docking a required floating body on the river bank side, suspending processed member units on the floating body, connecting and assembling the processed member units to form the platform, placing a pile driving device and steel pile casings on the platform in advance, then removing an anchoring system of the floating body, using a tugboat to drag the floating body to the designed pier position, pulling an anchor line to accurately position the platform, performing inserting and hitting operations on wading piles by means of a guiding device on the platform, wholly lifting the platform to perform system transformation after finishing inserting and hitting operations of the wading piles, fixing the platform on the wading piles, then continuously performing inserting and hitting operations on other steel pile casings, meanwhile performing drilling pile construction, constructing a cofferdam after finishing the drilling pile construction, and adjusting the platform elevation to enable the platform to serve as an inner supporting structure of the cofferdam. The construction method utilizes a construction process for floating body assembly and multifunctional platform transportation, the number of required large over-water devices is small, processing and installation on the bank are convenient, trestle construction in advance is not needed, and shortening of a construction period and reduction of the construction cost are facilitated.
Description
Technical field
The invention belongs to technical field of bridge construction, relate in particular to a kind of construction method of large-sized multifunction over-water construction platform.
Background technology
Bridge construction is according to design content, builds the process of bridge.It comprises bridge substructure construction, the construction of Superstructure Construction and bridge ancillary works.
Bridge substructure construction refers to the construction of bridge foundation and abutment, bridge pier.Bridge foundation is divided into by its structure and construction method: open cut foundation, pile foundation, cylinder pile foundation, open caisson foundation and laying foundation.Open cut foundation can open slope excavation pit or go along with sb. to guard him excavation with cofferdam.Pile foundation is generally used hammer driven, or vibrations sinking, or bores the method constructions such as (digging) hole perfusion.Since the sixties, along with the development of the new technologies such as jack up drilling platform waterborne, high-effect drilling and digging machine tool and mud off, mud casting, the application of bored pile in bridge foundation is increasingly extensive.Tubing string construction is general by vibrations enforced settlement, and in managing with boring, dig, the method such as suction removes native stone, to reduce sinking frictional resistance.Open caisson and Caisson, multiplex construction with artificial island in seashore or shallow water, available transportation by driving construction in deep water.Open caisson is used ream grab or suction dredge etc. in open caisson, to remove soil, draining simultaneously or not drainage sink.The general multiplex manpower of caisson excavates except soil under hyperbar, and condition of labor is poor, seldom uses at present.Masonry pier, abutment adopt on-site construction more, also can construct by splicing prefabricated components, and the many use climbing formss placing on the spot recently of concrete high pier.
Bridge superstructure construction refers to that the manufacture of bridge superstructure and installation set up, comprise that steel bridge's manufacture and steel bridge set up, concrete bridge manufacture (comprising plain concrete bridge, reinforced concrete bridge and prestressed concrete bridge) and Concrete bridge erection, and the construction of stone bridge, wooden bridge etc.Steel bridge is made rod member or beam section, is transported to building site assembling in factory.Prefabricated units or sections in concrete bridge Ke factory, also can placing on bridge location.Stone arch bridge is generally built by laying bricks or stones on bridge location by bow member method.How wooden bridge handling ease, manufacture in building site, and installation is set up.Steel bridge sets up the construction method with Concrete bridge erection, by the difference of bridge construction stress in erection construction, can be summarized as: 1. rack construction method.By support load-bearing, structure in construction in the state of not stressing.2. cantilever-construction.By the load-bearing of structure own, its stress is cantilever system.3. integrated stand is managed.The support conditions that structural stress state adopts when setting up.
The construction of bridge ancillary works refers to the construction of bridge approach and diversion structure.The embankment on plain river beach part of bridge approach should be used the soil property that water permeability is strong to fill, and with stone paving with protection against erosion.Diversion structure is many in the dry season, according to on-site constructions such as mattress, gabion, stone-laying or concrete for design.
At present, in bridge deepwater foundation construction, drilling platform adopts fixed or floating platform conventionally, and these type of platform general utility functions are comparatively single.In addition, existing fixed platform is generally first to build trestle, utilizes special leading truck inserted to play auxiliary pile and steel casing, then connected system between stake is set, and then on the bracket of auxiliary pile top and steel casing, distribution beam and platform framework is installed, and forms drilling platform.After pile foundation construction completes, when assembled cofferdam, need to remove platform, cofferdam inner support is separately installed.The construction method of above-mentioned fixed platform is loaded down with trivial details, is dropped in that equipment waterborne is many, construction cost is high, the cycle is long.
Summary of the invention
The present invention is in order to solve weak point of the prior art, and a kind of simple, construction method of being dropped in the large-sized multifunction over-water construction platform that equipment waterborne is few, cost is low, the cycle is short is provided.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: the construction method of large-sized multifunction over-water construction platform, comprises the following steps:
(1), in advance at least two buoyancy aids are set on the water, use anchor line by the buoyancy aid location of casting anchor;
(2), use crane barge or loop wheel machine that the member unit processing is hung onto on buoyancy aid, member unit is carried out assembledly on buoyancy aid, and at installation and guide device in assembled process, each member unit is bolted or soldering group is dressed up floating platform;
(3), remove the grappling of buoyancy aid, by tugboat, buoyancy aid and platform haul are located to default bridge pier position, then are drawn and establish anchor line buoyancy aid is accurately located;
(4), at the correct position of the sidepiece of buoyancy aid, utilize crane barge, pile driving equipment by steel casing through guiding device, flood stake is crossed in inserted to play construction;
(5), cross after flood stake completes by designing requirement inserted to play, use jack and/or hoist engine lifting platform to carry out system conversion, platform is connected and fixed with crossing big vast stake, makes platform deadweight be transformed into and cross flood stake above by buoyancy aid load-bearing, form a stable stool structure platform;
(6), buoyancy aid is hauled out to flat roof area, continue by guiding device, to remain the inserted to play of steel casing on platform, on platform, utilize the steel casing that rig completes inserted to play to carry out drilled pile operation simultaneously;
(7) pouring underwater concrete, after drilled pile construction completes, start the cofferdam of operation platform surrounding, and on the riverbed between drilled pile and inner side, cofferdam;
(8), remove the construction equipment on platform, recycling jack or hoist engine are adjusted to design elevation position by platform, by platform surrounding with inside cofferdam between be fixedly connected with, platform is converted to cofferdam inner supporting structure.
Described platform is comprised of top section and underclad portion, top section is formed by connecting by row's top rail and the upper longeron square crossing of a row, underclad portion is formed by connecting by row's lower transverse beam and the lower longeron square crossing of a row, all vertically corresponding and by vertical bar and hound, connect as one respectively one by one between top rail and lower transverse beam, between upper longeron and lower longeron; Between adjacent two top rails and adjacent two upper longerons and adjacent two lower transverse beams and adjacent two lower longerons, surround the vertical direction spatial that forms four-prism shape.
Described guiding device comprises four steel pipes of vertical setting, four steel pipes close on respectively four ribs of vertical direction spatial, every steel pipe is connected with upper longeron with top rail by bracket respectively, the lower end of four steel pipes is lower than the underclad portion of platform, every steel pipe inner side is equipped with two arc-shaped guide plates from top to bottom, arc-shaped guide plate on top and the top section co-altitude of platform arrange, an arc-shaped guide plate of bottom is located at the lower end inner side of steel pipe, the cylindrical shape that eight arc-shaped guide plates are encircled into for by the vertical passageway of steel casing; Between adjacent two steel pipes, level is provided with connecting rod, connecting rod is provided with upper, middle and lower-ranking, four connecting rods on upper strata are positioned at the top section of platform, four connecting rods in middle level are positioned at the underclad portion of platform, and four arc-shaped guide plate co-altitudes of four connecting rods of lower floor and bottom arrange.
The top section of described platform is provided with the governor motion that is positioned at four steel pipe outsides, governor motion comprises the holder being bolted on top rail and upper longeron, screw mandrel has been threaded on holder, the inner of screw mandrel is provided with the arc adjustable plate in the outside of top compressed steel pipe, and the axis direction of screw mandrel is consistent with the radial direction of vertical passageway.
Described lower transverse beam and lower longeron are provided with Connection Block at four rib places of vertical direction spatial, and the outside of steel pipe is provided with the link plate articulating with Connection Block.
In described vertical direction spatial, be provided with and two top rails and/or two gag lever posts that upper longeron is fixedly connected with, gag lever post is positioned at the point midway of adjacent two steel pipe lines.
While using crane barge lifting steel casing vertically through vertical passageway in step (4) and step (6), the middle part of four steel pipes is articulated on Connection Block by link plate, when steel casing gradient transfinites after tested, just operate screw mandrel top and press or leave steel pipe, make each two arc-shaped guide plates of upper strata upstream side and lower floor downstream and steel casing external surface closely connected, and make mouth at the bottom of steel casing, according to current size, certain pre-deviator is upstream set, and fixing bracket then, crane barge is transferred steel casing; Remove governor motion, be installed to another one guiding device outside and continue the verticality of steel casing to regulate.
Adopt technique scheme, first required buoyancy aid (barge) is rested in to the harbour position of river bank, buoyancy aid is linked together, the location of casting anchor, with loop wheel machine and crane barge hang the member unit processing on buoyancy aid on the bank, member unit is connected to spelling and form platform, on platform, place in advance pile driving equipment and steel casing, then remove the anchoring system of buoyancy aid, by tugboat, buoyancy aid being dragged to design pier position locates, draw and establish anchor line platform is accurately located, rely on the guiding device on platform, with crane barge lifting steel casing is auxiliary, to crossing flood stake, carry out inserted to play operation, cross after a flood stake inserted to play completes, carry out system conversion, platform is fixed on and is crossed in flood stake, make buoyancy aid roll bridge location away from, form a stabilized platform, then continue the inserted to play of other steel casing, on platform, carry out drilled pile construction simultaneously, after drilled pile construction completes, start the cofferdam of operation platform surrounding, adjust platform absolute altitude as the inner supporting structure in cofferdam construction process and after construction simultaneously.
Crossing flood stake is to construct dry season in river, crosses in the steel casing of flood stake and is filled with concrete, to guarantee to guarantee the flood season time stability of operation platform.
The lower end of four steel pipes of guiding device, lower than the underclad portion of platform, has extended the guiding to steel casing, can reduce the blastic deformation of current to steel casing like this when steel casing is transferred.
Four steel pipe outsides are articulated on Connection Block by link plate, are so not only convenient to dismounting, and can the adjusting of screw mandrel easy to use to steel casing verticality.
Gag lever post is for the position of location steel casing.After regulating the verticality of steel casing, steel pipe is fixed on top rail and upper longeron by bracket, so just to guarantee in transferring the process of steel casing, guiding device plays vertical guiding and resists the effect of current.
In sum, of the present inventionly utilize that buoyancy aid is assembled, the construction technology of transportation by driving multifunctional platform, play good guide effect, guarantee that steel casing keeps vertical state in decentralization process, improve the construction quality of crossing flood stake and drilled pile, the large-scale marine equipment of required input is few, in bank processing, easy for installation, without first construction bridge, be convenient to save the duration and reduce construction cost.
Accompanying drawing explanation
Fig. 1 is layout plan of the present invention;
Fig. 2 is the upward view of Fig. 1;
Fig. 3 is that platform load-bearing is at the schematic diagram crossing in flood stake;
Fig. 4 is the schematic diagram that platform is converted to cofferdam inner support;
Fig. 5 is the structural representation of guiding device in the present invention;
Fig. 6 is A-A sectional view in Fig. 5;
Fig. 7 is B-B sectional view in Fig. 5;
Fig. 8 is C-C sectional view in Fig. 5.
The specific embodiment
As Figure 1-Figure 8, the construction method of large-sized multifunction over-water construction platform of the present invention, comprises the following steps:
(1), in advance at least two buoyancy aids 1 are set on the water, use anchor line by buoyancy aid 1 location of casting anchor;
(2), use crane barge or loop wheel machine that the member unit processing is hung onto on buoyancy aid 1, member unit is carried out assembledly on buoyancy aid 1, and at installation and guide device 2 in assembled process, each member unit is bolted or soldering group is dressed up floating platform 3;
(3), remove the grappling of buoyancy aid 1, by tugboat, buoyancy aid 1 and platform 3 haul to default bridge pier positions are located, then are drawn and establish anchor line 4 buoyancy aid 1 is accurately located;
(4), at the correct position of the sidepiece of buoyancy aid 1, utilize crane barge, pile driving equipment by steel casing 5 through guiding device 2, flood stake 6 is crossed in inserted to play construction, crosses in the steel casing 5 of flood stake 6 and is filled with concrete;
(5), cross after flood stake 6 completes by designing requirement inserted to play, use jack and/or hoist engine to carry out system conversion to platform 3, platform 3 is connected and fixed with crossing flood stake 6, makes platform 3 deadweights be transformed into and cross in flood stake 6 by buoyancy aid 1 load-bearing, form a stable stool structure platform 3;
(6), buoyancy aid 1 is hauled out to platform 3 scopes, continue by guiding device 2, to remain the inserted to play of steel casing 5 on platform 3, the steel casing 5 that utilizes 9 pairs of inserted to plays of rig to complete on platform 3 carries out drilled pile 7 operations simultaneously;
(7) pouring underwater concrete 26, after drilled pile 7 constructed, start the cofferdam 8 of operation platform 3 surroundings, and on the riverbed between drilled pile 7 and 8 inner sides, cofferdam;
(8), remove the construction equipments such as rig 9 on platform 3, recycling jack or hoist engine are adjusted to design elevation position by platform 3, by between platform 3 surroundings and 8 inner sides, cofferdam, are fixedly connected with, platform 3 is converted to the inner supporting structure in cofferdam 8.
Guiding device 2 comprises four steel pipes 17 of vertical setting, four steel pipes 17 close on respectively four ribs of vertical direction spatial, every steel pipe 17 is connected with upper longeron 12 with top rail 11 by bracket 18 respectively, the lower end of four steel pipes 17 is lower than the underclad portion of platform 3, every steel pipe 17 inner sides are equipped with two arc-shaped guide plates 19 from top to bottom, an arc-shaped guide plate 19 on top arranges with the top section co-altitude of platform 3, an arc-shaped guide plate 19 of bottom is located at the inner side, lower end of steel pipe 17, the cylindrical shape that eight arc-shaped guide plates 19 are encircled into for by the vertical passageway of steel casing 5, between adjacent two steel pipes 17, level is provided with connecting rod 20, connecting rod 20 is provided with upper, middle and lower-ranking, four connecting rods 20 on upper strata are positioned at the top section of platform 3, four connecting rods 20 in middle level are positioned at the underclad portion of platform 3, four connecting rods 20 of lower floor and four arc-shaped guide plates, the 19 co-altitude settings of bottom.
The top section of platform 3 is provided with the governor motion that is positioned at four steel pipe 17 outsides, governor motion comprises the holder 21 being bolted on top rail 11 and upper longeron 12, screw mandrel 22 has been threaded on holder 21, the inner of screw mandrel 22 is provided with the arc adjustable plate 27 in the outside of top compressed steel pipe 17, and the axis direction of screw mandrel 22 is consistent with the radial direction of vertical passageway.
Lower transverse beam 13 and lower longeron 14 are provided with Connection Block 23 at four rib places of vertical direction spatial, and the outside of steel pipe 17 is provided with the link plate 24 articulating with Connection Block 23.
In vertical direction spatial, be provided with and two top rails 11 and/or two gag lever posts 25 that upper longeron 12 is fixedly connected with, gag lever post 25 is positioned at the point midway of adjacent two steel pipe 17 lines.
In step (4) and step (6), use when crane barge lifting steel casing 5 is vertical passes vertical passageway, the middle part of four steel pipes 17 is articulated on Connection Block 23 by link plate, when steel casing 5 gradients transfinite after tested, just operate screw mandrel 22 tops and press or leave steel pipe 17, make each two arc-shaped guide plates 19 of steel pipe 17 upper strata upstream sides and lower floor downstream closely connected with steel casing 5 external surfaces, and make 5 end of steel casing mouth, according to current size, certain pre-deviator is upstream set, then fixing bracket 18, crane barge is transferred steel casing 5; Remove governor motion, be installed to another one guiding device 2 outsides and continue the verticality of steel casing 5 to regulate.
The lower end of four steel pipes 17 of guiding device 2, lower than the underclad portion of platform 3, has extended the guiding to steel casing 5, can reduce the blastic deformation of current to steel casing 5 like this when steel casing 5 is transferred.
Four steel pipe 17 outsides are articulated on Connection Block 23 by link plate 24, are so not only convenient to dismounting, and adjusting that can 22 pairs of steel casing 5 verticality of screw mandrel easy to use.
After regulating the verticality of steel casing 5, steel pipe 17 is fixed on top rail 11 and upper longeron 12 by bracket 18, so just to guarantee in transferring the process of steel casing 5, guiding device 2 plays vertical guiding and resists the effect of current.The setting of gag lever post 25 is when pulling out guiding device 2, for the fixing position of steel casing 5.
The present embodiment is not done any pro forma restriction to shape of the present invention, material, structure etc.; any simple modification, equivalent variations and modification that every foundation technical spirit of the present invention is done above embodiment, all belong to the protection domain of technical solution of the present invention.
Claims (7)
1. the construction method of large-sized multifunction over-water construction platform, is characterized in that: comprises the following steps,
(1), in advance at least two buoyancy aids are set on the water, use anchor line by the buoyancy aid location of casting anchor;
(2), use crane barge or loop wheel machine that the member unit processing is hung onto on buoyancy aid, member unit is carried out assembledly on buoyancy aid, and at installation and guide device in assembled process, each member unit is bolted or soldering group is dressed up floating platform;
(3), remove the grappling of buoyancy aid, by tugboat, buoyancy aid and platform haul are located to default bridge pier position, then are drawn and establish anchor line buoyancy aid is accurately located;
(4), at the correct position of the sidepiece of buoyancy aid, utilize crane barge, pile driving equipment by steel casing through guiding device, flood stake is crossed in inserted to play construction;
(5), cross after flood stake completes by designing requirement inserted to play, use jack and/or hoist engine lifting platform to carry out system conversion, platform is connected and fixed with crossing big vast stake, makes platform deadweight be transformed into and cross flood stake above by buoyancy aid load-bearing, form a stable stool structure platform;
(6), buoyancy aid is hauled out to flat roof area, continue by guiding device, to remain the inserted to play of steel casing on platform, on platform, utilize the steel casing that rig completes inserted to play to carry out drilled pile operation simultaneously;
(7) pouring underwater concrete, after drilled pile construction completes, start the cofferdam of operation platform surrounding, and on the riverbed between drilled pile and inner side, cofferdam;
(8), remove the construction equipment on platform, recycling jack or hoist engine are adjusted to design elevation position by platform, by platform surrounding with inside cofferdam between be fixedly connected with, platform is converted to cofferdam inner supporting structure.
2. the construction method of large-sized multifunction over-water construction platform according to claim 1, it is characterized in that: described platform is comprised of top section and underclad portion, top section is formed by connecting by row's top rail and the upper longeron square crossing of a row, underclad portion is formed by connecting by row's lower transverse beam and the lower longeron square crossing of a row, all vertically corresponding and by vertical bar and hound, connect as one respectively one by one between top rail and lower transverse beam, between upper longeron and lower longeron; Between adjacent two top rails and adjacent two upper longerons and adjacent two lower transverse beams and adjacent two lower longerons, surround the vertical direction spatial that forms four-prism shape.
3. the construction method of large-sized multifunction over-water construction platform according to claim 2, it is characterized in that: described guiding device comprises four steel pipes of vertical setting, four steel pipes close on respectively four ribs of vertical direction spatial, every steel pipe is connected with upper longeron with top rail by bracket respectively, the lower end of four steel pipes is lower than the underclad portion of platform, every steel pipe inner side is equipped with two arc-shaped guide plates from top to bottom, arc-shaped guide plate on top and the top section co-altitude of platform arrange, an arc-shaped guide plate of bottom is located at the inner side, lower end of steel pipe, the cylindrical shape that eight arc-shaped guide plates are encircled into for by the vertical passageway of steel casing, between adjacent two steel pipes, level is provided with connecting rod, connecting rod is provided with upper, middle and lower-ranking, four connecting rods on upper strata are positioned at the top section of platform, four connecting rods in middle level are positioned at the underclad portion of platform, and four arc-shaped guide plate co-altitudes of four connecting rods of lower floor and bottom arrange.
4. the construction method of large-sized multifunction over-water construction platform according to claim 3, it is characterized in that: the top section of described platform is provided with the governor motion that is positioned at four steel pipe outsides, governor motion comprises the holder being bolted on top rail and upper longeron, screw mandrel has been threaded on holder, the inner of screw mandrel is provided with the arc adjustable plate in the outside of top compressed steel pipe, and the axis direction of screw mandrel is consistent with the radial direction of vertical passageway.
5. the construction method of large-sized multifunction over-water construction platform according to claim 4, is characterized in that: described lower transverse beam and lower longeron are provided with Connection Block at four rib places of vertical direction spatial, and the outside of steel pipe is provided with the link plate articulating with Connection Block.
6. the construction method of large-sized multifunction over-water construction platform according to claim 5, it is characterized in that: in described vertical direction spatial, be provided with and two top rails and/or two gag lever posts that upper longeron is fixedly connected with, gag lever post is positioned at the point midway of adjacent two steel pipe lines.
7. the construction method of large-sized multifunction over-water construction platform according to claim 6, it is characterized in that: while using crane barge lifting steel casing vertically through vertical passageway in step (4) and step (6), the middle part of four steel pipes is articulated on Connection Block by link plate, when steel casing gradient transfinites after tested, just operate screw mandrel top and press or leave steel pipe, make each two arc-shaped guide plates of upper strata upstream side and lower floor downstream and steel casing external surface closely connected, and at the bottom of making steel casing, mouth upstream arranges certain pre-deviator according to current size, then fixing bracket, crane barge is transferred steel casing, remove governor motion, be installed to another one guiding device outside and continue the verticality of steel casing to regulate.
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| CN109610290B (en) * | 2019-01-24 | 2021-03-19 | 河海大学 | Landscape trestle |
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| CN113605344A (en) * | 2021-09-16 | 2021-11-05 | 中国铁建大桥工程局集团有限公司 | Deepwater foundation combined drilling platform and erection method |
| WO2023071518A1 (en) * | 2021-10-25 | 2023-05-04 | 中交第三航务工程局有限公司 | Method for building platform for construction of cast-in-place piles of high-piled wharf |
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