CN111021251B - Construction method for assembling steel box girder above tramcar - Google Patents
Construction method for assembling steel box girder above tramcar Download PDFInfo
- Publication number
- CN111021251B CN111021251B CN201911226309.1A CN201911226309A CN111021251B CN 111021251 B CN111021251 B CN 111021251B CN 201911226309 A CN201911226309 A CN 201911226309A CN 111021251 B CN111021251 B CN 111021251B
- Authority
- CN
- China
- Prior art keywords
- distribution beam
- distribution
- box girder
- steel box
- track
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
Abstract
The invention relates to a construction method for assembling a steel box girder above a tramcar, wherein temporary supports are erected on two sides of a track, the temporary supports are provided with caps for receiving the steel box girder and enabling an interval to exist between the steel box girder and a distribution girder, the steel box girder is assembled on the temporary supports, and after the assembly, each temporary support is sequentially disassembled: removing the cap head, arranging outer pulleys and inner pulleys on lattice columns on two sides of the track, tying an outer rope body on a cross brace close to the end part, tying an inner rope body on a cross brace close to the span, hoisting the distribution beam, performing span cutting on the distribution beam, controlling the inner and outer rope bodies to move the distribution beam to two sides, then unloading the distribution beam, and finally dismantling the rest part. The construction method can be used for splicing and constructing the bridge steel box girder above the track on the premise of ensuring the safety of the track foundation and the safety of a power grid. Meanwhile, the construction efficiency and the safety of rail transit are guaranteed.
Description
Technical Field
The invention relates to a construction method of a steel box girder, in particular to a construction method for assembling the steel box girder above a tramcar.
Background
The construction of the steel box girder above the tramcar is a difficult problem of the construction of urban viaducts all the time. In order not to damage the foundation of the tramcar, the buttress cannot be arranged in a certain range area where the tramcar is located, and the contact network line cannot be damaged during construction. Therefore, how to carry out bridge construction while ensuring the basic structure of the tramcar becomes a problem to be solved urgently.
Disclosure of Invention
The invention mainly aims to provide a construction method of a steel box girder, which can be used in the case that a tramcar is arranged below a construction station so as to prevent the foundation structure of the tramcar from being damaged.
In order to achieve the purpose, the invention provides a construction method for assembling a steel box girder above a tramcar, which comprises the following steps:
step one, a plurality of temporary supports are erected along the trend of the steel box girder, wherein each temporary support comprises a plurality of caps, a plurality of distribution girders, a plurality of lattice columns and a plurality of support base plates, the plurality of lattice columns are respectively arranged on two sides of a track to jointly bear and fixedly connect the plurality of distribution girders, the support base plates butted with the lattice columns are erected on the ground, the distribution girders span the lattice columns on two sides of the track and are jointly supported and fixedly connected by the lattice columns, the plurality of distribution girders are fixedly connected through a plurality of cross braces, a plurality of caps are fixedly connected on the upper surface of the distribution girders at intervals, and the caps are used for bearing the steel box girder and enabling the steel box girder and the distribution girders to have intervals,
step two, assembling the steel box girder on the temporary support,
step three, sequentially removing each temporary support, wherein the removal of each temporary support comprises the following steps:
i. the cap head is cut off to separate the temporary support from the steel box girder,
ii, arranging an outer pulley and an inner pulley on lattice columns on two sides of the track, tying an outer rope body on a cross brace positioned on two sides of the track and close to the end part in the distribution beam, tying an inner rope body on a cross brace close to the span, folding the outer rope body by the inner pulley, folding the inner rope body by the outer pulley,
iii, separating the distribution beam from the lattice columns, lifting the distribution beam, placing a sliding mechanism between the distribution beam and the top ends of the lattice columns, fixing the sliding mechanism on the top ends of the lattice columns, then descending the distribution beam onto the sliding mechanism,
cutting the distribution beam into two sections at the midspan position of the distribution beam, pulling the inner rope body to apply outward pulling force to the cut distribution beam section so as to pull the distribution beam section to slide outward, pulling the outer rope body to apply inward pulling force to the distribution beam section so as to control the sliding speed,
v. unloading after lowering the distribution beam section,
unloading the lattice column and the support mat.
The construction method also comprises the following optimization process:
the sliding mechanism comprises:
a base and a mandrel, the base supporting said mandrel, an
The rotating roller is sleeved outside the mandrel, a bearing is matched between the rotating roller and the mandrel, the surface of the rotating roller is used for supporting the distribution beam,
and the baffle is fixed on the base and used for preventing the distribution beam from sideslipping.
The sliding mechanism can further comprise a lateral auxiliary roller which is arranged on the base and used for guiding the side surface of the distribution beam to slide.
The distribution beam preferably adopts I-steel, the baffle covers on the shank of I-steel, and the baffle restricts the up-and-down movement of I-steel with changeing the rod jointly.
The lattice column comprises steel pipe columns and angle steel supports connected with the steel pipe columns.
The support base plate is provided with a groove for a forklift.
Two lattice columns are arranged on two sides of the track in each temporary support along the transverse bridge direction.
The construction method can be used for splicing the bridge steel box girder above the tramcar on the premise of ensuring the safety of the rail foundation and the safety of a power grid. Meanwhile, the construction efficiency and the safety of rail transit are guaranteed.
Drawings
Fig. 1 is a schematic view of the erection of a temporary support and a steel box girder.
Fig. 2 is a schematic view with the cap head removed.
Fig. 3 is a schematic view of the lifting distributor beam and the placement slide mechanism.
Fig. 4 is a partial schematic view of the sliding mechanism.
Fig. 5 is a schematic view written on a distribution beam.
Fig. 6 is a schematic view of the unloading lattice column and the support mat.
In the figure: 1. the steel box beam, 2, a temporary support, 3, a rail, 4, a power grid, 5, a distribution beam, 6, a lattice column, 7, a support cushion plate, 8, a cap head, 9, an outer pulley, 10, an inner pulley, 11, a sliding mechanism, 12, a midspan position, 13, a base, 14, a bearing, 15, a mandrel, 16, a rotating roller, 17, a baffle, 18, a cross brace and 19, an auxiliary roller.
Detailed Description
The invention is further described below with reference to examples and figures, which are only illustrative and not intended to limit the scope of the invention.
Step one, temporary support erection:
as shown in fig. 1, the overall structure of the support is a steel structure, which includes a plurality of caps, a plurality of distribution beams, a plurality of lattice columns, and a plurality of support mats. The main structure adopts phi 180 x 10 (few branches are supported by phi 299 x 10 seamless steel pipes instead of phi 180 x 10 steel pipes), and the steel pipes are supported by L75 x 8 angle steels in a bolted mode between upright columns, so that a 2 x 2m lattice column mode is formed integrally. And C20a and a 20mm thick steel plate form a support base plate at the lower side of the lattice column, and the support base plate is butted with the lattice column. The upper sides of the latticed columns are welded with 24m through length I56b I-steel distribution beams, the distribution beams cross over the latticed columns on two sides of the track and are supported and fixedly connected by the latticed columns, the upper surfaces of the distribution beams are fixedly connected with a plurality of cap heads at intervals, the cap heads are used for bearing the steel box beams and enabling the steel box beams and the distribution beams to have intervals, and one phi 121 x 6 seamless steel pipe is welded between every 2.5 m of the transverse distribution beams. In order to ensure the strength of the bracket, all welding seams except the flat angle steel and the steel pipe support need to meet the equal strength welding.
And step two, hoisting and assembling the steel box girder. The assembly can be carried out according to a construction scheme.
And step three, sequentially dismantling the temporary supports. The removing sequence of each temporary support is as follows: steel pipe cap head-distribution beam-frame column and support backing plate. The method specifically comprises the following steps:
1. and (3) detaching the steel pipe caps above the gas cutting distribution beam one by one to separate the temporary support from the steel box beam (see figure 2).
2. The distribution beam is disassembled. The disassembly of the distribution beam mainly adopts a sliding method for disassembly, and the specific operation method is as follows:
a. before the distribution beams are disassembled, pulley blocks are connected between the distribution beams, 2 groups of pulleys (shown in figure 2) are respectively fixed on two sides of each distribution beam, the pulleys are 80V-shaped, the pulleys on the outer side of the temporary support are used for dragging the distribution beams, the pulleys on the inner side of the temporary support are used for controlling the sliding speed for ensuring safety and reverse action, the guide rope is a common hemp rope with the length of 20mm multiplied by 12m, one end of the hemp rope is fixed on a cross brace connected with the distribution beams of the whole truss, and the other end of the hemp rope is dragged by a special person.
b. As shown in figure 3, after the pulley block is fixed in place, the distribution beam and the temporary support lattice column are separated and disassembled, 2 10t chain blocks are hung on the two sides of the transverse bridge in the lateral direction respectively by adopting 25t and 16t truck cranes or box girder cantilever sides to integrally lift 0.3 m high (the weight of the whole frame of the distribution beam is 12.2t, the 5m turning radius of the 25t truck crane, the arm length is 13.75 m, the rated lifting capacity is 14.4 t, the 5m turning radius of the 16t truck crane, the arm length is 14m, the rated lifting capacity is 12 t, and the double-crane lifting meets the requirements), and a sliding mechanism is welded at the position of the column top plate above the temporary support lattice column by utilizing an on-site lift truck. The sliding mechanism structure is shown in figure 4, and comprises a base and a mandrel, wherein the mandrel is supported by the base, and b rotary rollers are sleeved outside the mandrel, bearings are matched between the rotary rollers and the mandrel, the surfaces of the rotary rollers are used for supporting the distribution beam, and c baffles are fixed on the base and used for preventing the distribution beam from sideslipping. The auxiliary roller is arranged on the base and used for guiding the side face of the distribution beam to slide, after welding, the beam is slowly dropped and placed above the hybrid concrete bar, and then the beam is cut into 2 sections at the position of the span of the distribution beam. Aiming at the problem of overweight when the middle of the distribution beam is broken into 2 sections, the upper end of the auxiliary roller is welded with a baffle plate, the baffle plate covers the leg of the I-shaped steel, the baffle plate and the rotating roller together limit the up-and-down movement of the I-shaped steel, and the half-truss distribution beam is prevented from overturning to the midspan.
c. As shown in fig. 5, the pulley block is used for manually slipping outwards, the inner rope body is pulled to apply outward pulling force to the cut distribution beam section so as to pull the distribution beam section to slip outwards, and the outer rope body is pulled to apply inward pulling force to the distribution beam section so as to control the slipping speed. When the gravity center position of the half-span distribution beam is arranged on the side of the cantilever of the bridge, 16t of automobile cranes are used for hanging and distributing on the end side to prevent overturning, when the gravity center of the distribution beam slides to a position 0.5m away from the outer side of the box beam, 25t of automobiles are unloaded to the ground, the length of the lifted arm of the 25t of automobile cranes is 17.3m, the turning radius is 7m, and the rated lifting capacity is 9.8t, so that the hoisting requirement is met. The other side half-span distribution beam is unloaded in the same way. The inner bearing of the sliding mechanism is of a deep groove ball bearing 6305 type, the friction coefficient is mu =0.001-0.0015, the friction coefficient is 0.0015, the weight of the half-truss distribution beam is about 6.1t, the horizontal tension force f = mu N =0.0015 x 6.1 x 9.8=0.09KN, and the half-truss distribution beam can be pulled by acting force equivalent to 9 kg. The 20mm diameter hemp rope is selected for dragging, wherein the ultimate tensile force of the common hemp rope is S =7.85d =7.85 20=3140N, and the 20mm diameter common hemp rope meets the requirement when the action does not exceed 320kg force.
3. As shown in fig. 6, the temporary support lattice posts and support backing plates are removed. The temporary support frame lattice column and the support frame backing plate are removed integrally by a 10t hydraulic forklift (the self weight is 12.51 t) (the total weight of phi 180 x 10 standard single-frame lattice column and the support frame backing plate is about 6.5t, and the total weight of phi 299 x 10 standard single-frame lattice column and the support frame backing plate is about 7.6 t), and 2C 22a channel steel with the length of 500mm is welded on the upper surface of the support frame backing plate to be used as a forklift groove. The disassembly sequence is disassembled one by one from outside to inside. The road is moved to an open road surface by a 10t hydraulic forklift and is reversely moved to a specified position. The lifting height of the hydraulic forklift is not too high, and the requirement of the whole vehicle condition can be met by ensuring that the whole gravity center does not exceed the free lifting height of the hydraulic forklift by 3 meters.
Given phi 180X 10 lattice column weight G1=30.38KN, moment arm X1=3940mm, stent pad weight G2=34.3KN, moment arm X2=120mm, overall weight G3=64.68KN, calculated as:
Given phi 299X 10 lattice column weight G1=41.16KN, moment arm X1=3940mm, stent pad weight G2=34.3KN, moment arm X2=120mm, overall weight G3=75.46KN, calculated as:
x3 × G3= X1 × G1+ X2 × G2, and the member center of gravity is from ground X3=2204 mm.
Claims (6)
1. A construction method for assembling a steel box girder above a tramcar is characterized by comprising the following steps:
step one, a plurality of temporary supports are erected along the trend of the steel box girder, wherein each temporary support comprises a plurality of caps, a plurality of distribution girders, a plurality of lattice columns and a plurality of support base plates, the plurality of lattice columns are respectively arranged on two sides of a track to jointly bear and fixedly connect the plurality of distribution girders, the support base plates butted with the lattice columns are erected on the ground, the distribution girders span the lattice columns on two sides of the track and are jointly supported and fixedly connected by the lattice columns, the plurality of distribution girders are fixedly connected through a plurality of cross braces, a plurality of caps are fixedly connected on the upper surface of the distribution girders at intervals, and the caps are used for bearing the steel box girder and enabling the steel box girder and the distribution girders to have intervals,
step two, assembling the steel box girder on the temporary support,
step three, sequentially removing each temporary support, wherein the removal of each temporary support comprises the following steps:
i. the cap head is cut off to separate the temporary support from the steel box girder,
ii, arranging an outer pulley and an inner pulley on lattice columns on two sides of the track, tying an outer rope body on a cross brace positioned on two sides of the track and close to the end part in the distribution beam, tying an inner rope body on a cross brace close to the span, folding the outer rope body by the inner pulley, folding the inner rope body by the outer pulley,
iii, separating the distribution beam from the lattice columns, lifting the distribution beam, placing a sliding mechanism between the distribution beam and the top ends of the lattice columns, fixing the sliding mechanism on the top ends of the lattice columns, then descending the distribution beam onto the sliding mechanism,
cutting the distribution beam into two sections at the midspan position of the distribution beam, pulling the inner rope body to apply outward pulling force to the cut distribution beam section so as to pull the distribution beam section to slide outward, pulling the outer rope body to apply inward pulling force to the distribution beam section so as to control the sliding speed,
v. unloading after lowering the distribution beam section,
unloading the lattice column and the support base plate;
the sliding mechanism comprises:
a base and a mandrel, the base supporting said mandrel, an
The rotating roller is sleeved outside the mandrel, a bearing is matched between the rotating roller and the mandrel, the surface of the rotating roller is used for supporting the distribution beam,
and the baffle is fixed on the base and used for preventing the distribution beam from sideslipping.
2. The method of claim 1, wherein the sliding mechanism further comprises lateral auxiliary rollers disposed on the base for guiding the sliding of the side surfaces of the distributor beam.
3. The construction method according to claim 1, wherein the distribution beam is made of i-steel, the baffle covers the leg of the i-steel, and the baffle and the rotating roller limit the up-and-down movement of the i-steel.
4. The construction method according to claim 1, wherein the lattice column comprises steel pipe columns and angle supports for connecting the steel pipe columns.
5. The method of claim 1, wherein the pallet is provided with a forklift recess.
6. The construction method according to claim 1, wherein two lattice columns are provided in each temporary stand in the cross bridge direction on both sides of the track.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911226309.1A CN111021251B (en) | 2019-12-04 | 2019-12-04 | Construction method for assembling steel box girder above tramcar |
| PCT/CN2020/096477 WO2021109535A1 (en) | 2019-12-04 | 2020-06-17 | Construction method for assembling steel box girder above tramcar |
| DE202020104701.9U DE202020104701U1 (en) | 2019-12-04 | 2020-08-13 | Structure of the assembled steel box girder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911226309.1A CN111021251B (en) | 2019-12-04 | 2019-12-04 | Construction method for assembling steel box girder above tramcar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111021251A CN111021251A (en) | 2020-04-17 |
| CN111021251B true CN111021251B (en) | 2021-11-16 |
Family
ID=70204197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911226309.1A Active CN111021251B (en) | 2019-12-04 | 2019-12-04 | Construction method for assembling steel box girder above tramcar |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN111021251B (en) |
| DE (1) | DE202020104701U1 (en) |
| WO (1) | WO2021109535A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111021251B (en) * | 2019-12-04 | 2021-11-16 | 中铁上海工程局集团有限公司 | Construction method for assembling steel box girder above tramcar |
| CN112211112A (en) * | 2020-09-03 | 2021-01-12 | 宁波市政工程建设集团股份有限公司 | Steel box girder installation method adopting double-guide-girder erection machine on existing bridge |
| CN113216023A (en) * | 2021-05-28 | 2021-08-06 | 中交路桥建设有限公司 | Method for dismantling small-space bracket of Pi-shaped cable-stayed bridge |
| CN113463523B (en) * | 2021-08-13 | 2022-10-04 | 中建八局第二建设有限公司 | Stable support frame assembly for expressway steel box girder construction and construction method thereof |
| CN113832868A (en) * | 2021-11-04 | 2021-12-24 | 中铁三局集团有限公司 | Dismantling device and construction method for railway temporary support |
| CN114211212B (en) * | 2022-01-19 | 2022-10-21 | 杭州萧山交通建设管理有限公司 | Manufacturing and construction method of large-section steel box girder |
| CN114892526B (en) * | 2022-05-12 | 2023-10-20 | 中铁十局集团青岛工程有限公司 | Overhead hoist is used in steel case roof beam construction |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100699413B1 (en) * | 2006-05-02 | 2007-03-23 | 삼표이앤씨 주식회사 | Channel bridge construction method available to control channel bridge segment sag |
| CN101713170A (en) * | 2009-10-27 | 2010-05-26 | 中国第一冶金建设有限责任公司 | Integral slide device and method of floor steel pipe column bracket of bridge end bay closure section construction |
| CN201722615U (en) * | 2010-06-01 | 2011-01-26 | 中铁二十二局集团有限公司 | Spanning type construction system with large-span box girder |
| CN208055958U (en) * | 2018-04-02 | 2018-11-06 | 长沙学院 | Garbage cleaning vehicle |
| CN109235290A (en) * | 2018-10-11 | 2019-01-18 | 中建钢构有限公司 | Bridge peace tears construction method open |
| CN109577166A (en) * | 2018-11-30 | 2019-04-05 | 杭州江润科技有限公司 | On across active service highway door opening bracket and construction method |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5405337B2 (en) * | 2010-02-01 | 2014-02-05 | 株式会社フジタ | Construction method of railway RC ramen structure viaduct |
| KR20120100005A (en) * | 2011-03-02 | 2012-09-12 | (주)누리플랜코리아 | Method for constructing temporary bridge using prestressing wire |
| CN202899044U (en) * | 2012-07-26 | 2013-04-24 | 中铁六局集团有限公司 | Vierendeel box-shaped double-girder bridge crane |
| CN108677679A (en) * | 2018-07-12 | 2018-10-19 | 中铁四院集团西南勘察设计有限公司 | Overhead steel reinforced concrete combination beam |
| CN109518604A (en) * | 2018-07-23 | 2019-03-26 | 中铁重工有限公司 | One kind being used for deep camber steel box-girder push construction method |
| CN208995936U (en) * | 2018-08-23 | 2019-06-18 | 中交路桥建设有限公司 | S type steel box girder of cable stayed bridge on across ground rail traffic slides mounting bracket |
| CN111021251B (en) * | 2019-12-04 | 2021-11-16 | 中铁上海工程局集团有限公司 | Construction method for assembling steel box girder above tramcar |
-
2019
- 2019-12-04 CN CN201911226309.1A patent/CN111021251B/en active Active
-
2020
- 2020-06-17 WO PCT/CN2020/096477 patent/WO2021109535A1/en active Application Filing
- 2020-08-13 DE DE202020104701.9U patent/DE202020104701U1/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100699413B1 (en) * | 2006-05-02 | 2007-03-23 | 삼표이앤씨 주식회사 | Channel bridge construction method available to control channel bridge segment sag |
| CN101713170A (en) * | 2009-10-27 | 2010-05-26 | 中国第一冶金建设有限责任公司 | Integral slide device and method of floor steel pipe column bracket of bridge end bay closure section construction |
| CN201722615U (en) * | 2010-06-01 | 2011-01-26 | 中铁二十二局集团有限公司 | Spanning type construction system with large-span box girder |
| CN208055958U (en) * | 2018-04-02 | 2018-11-06 | 长沙学院 | Garbage cleaning vehicle |
| CN109235290A (en) * | 2018-10-11 | 2019-01-18 | 中建钢构有限公司 | Bridge peace tears construction method open |
| CN109577166A (en) * | 2018-11-30 | 2019-04-05 | 杭州江润科技有限公司 | On across active service highway door opening bracket and construction method |
Non-Patent Citations (1)
| Title |
|---|
| 高速公路枢纽互通钢箱梁临时支架设计及研究;王英森;《铁道建筑技术》;20190131(第1期);第45-49页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE202020104701U1 (en) | 2020-09-21 |
| WO2021109535A1 (en) | 2021-06-10 |
| CN111021251A (en) | 2020-04-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111021251B (en) | Construction method for assembling steel box girder above tramcar | |
| CN111335187B (en) | Construction process for triangular area of open-web rigid frame bridge | |
| CN107447687A (en) | Cross-line continuous beam is whole across method for dismounting and dismounting sectional shelf-unit | |
| CN111778857B (en) | Process for synchronously erecting upper and lower beams of double-layer overhead bridge of urban public rail | |
| CN108316152A (en) | A kind of high pier capping beam construction mobile formwork and its construction technology | |
| US5940916A (en) | Bridge span-by-span construction apparatus and method | |
| CN210288140U (en) | Simple and easy prefabricated decking hoist and mount platform truck | |
| CN114808747A (en) | Multifunctional bridge girder erection machine and bridge girder erection construction method | |
| CN210766417U (en) | Pier-spanning lifting beam support device at side position of bridge | |
| CN111705682A (en) | Construction method and equipment for removing and rebuilding superstructure of widened bridge across electrified railway | |
| CN102926330A (en) | Installation method of hanging basket suitable for bridge construction | |
| CN115961549A (en) | Rear-feeding beam type erection construction method for large-tonnage whole-section steel beam of cable-stayed bridge | |
| CN212505899U (en) | Lightweight prestressing trackless construction hanging basket | |
| CN111877165B (en) | Bailey beam translation device in limited space and construction method thereof | |
| CN214329956U (en) | Ring rail hoisting device for curtain wall installation | |
| CN111139742B (en) | Method for mounting and dismounting highway bridge girder erection machine | |
| CN212374745U (en) | Low-clearance steel reinforcement cage hoisting device | |
| CN210636823U (en) | Rail type overhead connecting device for pier body steel bar overhead connecting construction | |
| CN211171637U (en) | Steel box girder installation system | |
| CN113774813A (en) | Traction deviation rectifying equipment convenient for installing large-section steel truss box girder | |
| CN217174404U (en) | Pushing jack transfer bracket after steel box girder pushing is completed | |
| KR20100078371A (en) | Rapid replacement method and apparatus using pulling-up facility and scaffold truss with wheels under the bottom of existing and replacing bridges | |
| CN104631336B (en) | Mobile storage platform for storing steel truss girder pieces and construction method of mobile storage platform | |
| CN217499962U (en) | Multifunctional bridge girder erection machine | |
| CN216764103U (en) | Hoisting portal frame for roller type combined cable saddle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |