CN113914896B - Railway tunnel two-lining defect repairing construction method - Google Patents
Railway tunnel two-lining defect repairing construction method Download PDFInfo
- Publication number
- CN113914896B CN113914896B CN202111105486.1A CN202111105486A CN113914896B CN 113914896 B CN113914896 B CN 113914896B CN 202111105486 A CN202111105486 A CN 202111105486A CN 113914896 B CN113914896 B CN 113914896B
- Authority
- CN
- China
- Prior art keywords
- concrete
- defect
- tank truck
- tunnel
- longitudinal beam
- 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
- 238000010276 construction Methods 0.000 title claims abstract description 37
- 230000007547 defect Effects 0.000 title claims abstract description 37
- 238000003756 stirring Methods 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 18
- 239000010959 steel Substances 0.000 claims description 18
- 239000004575 stone Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 17
- 238000005336 cracking Methods 0.000 abstract description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/102—Removable shuttering; Bearing or supporting devices therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
Abstract
The application relates to a method for repairing and constructing defects of a railway tunnel secondary lining, and belongs to the technical field of tunnel construction. The method comprises the steps of stirring and transporting the defect eliminating concrete, transferring the defect eliminating concrete into the concrete track tank truck, constructing an adjustable supporting system at a defect repairing point of a second lining in a tunnel, pouring and curing the defect eliminating concrete, and dismantling the adjustable supporting system. The application has compact and tight arrangement of each procedure, greatly shortens the repairing time by parallel operation, and adopts an adjustable supporting system which does not invade the safety limit of train running when in use and can allow various construction trains to pass. The method has scientific design and reasonable working procedures, effectively solves the problems of short concrete construction time and rapid construction time of the vault of the tunnel, ensures that the short concrete construction of the vault of the tunnel has sufficient time, and avoids the problems of concrete cracking and the like caused by early form removal after pouring.
Description
Technical Field
The application belongs to the technical field of tunnel construction, and particularly relates to a method for repairing and constructing defects of a railway tunnel secondary lining.
Background
Along with the accelerated construction of large foundation projects such as railways in China, tunnel engineering construction is quite common, and tunnel defect eliminating construction often has cross operation with construction such as electrification, frame laying and the like due to shortage of railway tunnel construction period. At present, the vault is used for eliminating the defect, namely, a tunnel is closed by utilizing a time gap in which construction trains of units such as electrification, laying frames and the like do not pass, a full-hall scaffold reinforcing template is erected at a defect part, lining concrete is poured, and after the concrete reaches a form removal condition, the scaffold is removed to recover the passing condition of the trains in the tunnel. Because the tunnel sealing time is short and generally does not exceed 24 hours, the working of building a full-hall frame, installing a template, pouring concrete, waiting for the strength of the concrete, removing a mould and the like are completed in the period, the time is very rapid, the workload is extremely large, and the construction quality is greatly influenced.
Disclosure of Invention
The application aims to solve the problems in the prior art and provides a method for repairing and constructing the defects of the two lining of the railway tunnel. The method of the application utilizes an adjustable support system and tight connection among working procedures to shorten the occupation of tunnel driving space caused by tunnel two-lining defect construction as much as possible, and is particularly suitable for construction of single track railway tunnels.
The application is realized by the following technical scheme:
a railway tunnel two-lining defect repairing construction method comprises the following steps:
1) Stirring and transporting of defect-eliminating concrete
The defect-eliminating concrete adopts fine stone concrete, improves the grade compared with the original design lining concrete, is intensively mixed by a mixing station, and is transported to a construction site by a conventional concrete tank truck;
2) Special concrete rail tank car for eliminating defects and upper track
The concrete track tank truck has the same structure as a conventional concrete tank truck, and the difference is that four groups of wheels of the concrete track tank truck adopt track wheels matched with a track, and the concrete track tank truck is hoisted to the track by a crane, so that the track-feeding work of the concrete track tank truck is completed;
3) Transferring the defect-eliminating concrete into a concrete rail tank car
After the concrete rail tank truck is on the road, the defect eliminating concrete in the conventional concrete tank truck is transferred into the concrete rail tank truck through the concrete hanging barrel, and then the concrete rail tank truck is transported to a pouring place;
4) Construction of adjustable supporting system at defect repairing point of two lining in tunnel
The adjustable supporting system comprises a left longitudinal beam and a right longitudinal beam which are arranged in parallel, wherein a plurality of stand columns which are arranged at intervals are uniformly distributed and fixed at the bottom of each longitudinal beam, and a chute which is arranged along the length direction of each longitudinal beam and is provided with an upward notch is fixed at the top of each longitudinal beam; a plurality of parallel arch rings which are arranged at intervals are arranged between the left longitudinal beam and the right longitudinal beam in a crossing way, a sleeve with a down-arranged nozzle is fixed at the end part of each arch ring, an adjusting screw rod is connected to the sleeve in a threaded manner, a clamping block is fixed at the end part of the bottom end of the adjusting screw rod, and the clamping block is clamped in a sliding groove at the corresponding side in a sliding way;
when the adjustable supporting system is installed, firstly, the upright posts are fixedly installed on the ditch walls and the cover plates at two sides, the longitudinal beams, the sliding grooves and the adjusting screw rods are fixedly installed at the upper parts of the upright posts, and then the arch ring is installed; after the arch ring is installed, the height of the arch ring is adjusted through the adjusting screw rod, so that the arch ring props against the arch part template and is stressed;
5) Pouring and curing of defect-eliminating concrete
After the construction of the adjustable support system is finished, pouring and maintaining the defect eliminating concrete at the defect position of the second lining of the tunnel can be carried out through the concrete rail tank truck;
6) Removal of an adjustable support system
And after the lack-eliminating concrete reaches a certain strength, the template and the adjustable supporting system are removed.
Further, in the adjustable supporting system, one diagonal bracing beam is arranged between every two adjacent upright posts in a plurality of upright posts at the bottom of each longitudinal beam, and all the diagonal bracing beams are sequentially connected end to form a zigzag arrangement.
Further, in the adjustable supporting system, a base plate is fixed at the bottom end part of each upright post.
Furthermore, in the adjustable supporting system, the longitudinal beam is made of I16I-steel, and the joint of the longitudinal beam and the upright post is fully welded with a 10mm steel plate and is connected through a high-strength bolt; the upright posts are made of I16I-steel, the total height of the upright posts is 4.4m, the upright posts are divided into two sections, the length of a single section is 2.2m, the joints of the two sections are fully welded with 10mm steel plates and are connected through high-strength bolts, and the interval between adjacent upright posts in the same row is 933mm; the arch ring is made of I10I-steel, the radian of the arch ring is set according to the angle of the vault of the tunnel, and the distance between adjacent arch rings is 350mm.
Further, in the adjustable support system, the length of the diagonal bracing beam is 2474mm.
The method has compact arrangement of each procedure, tight connection among the procedures, and greatly shortens the repairing time through parallel operation, an adjustable supporting system is adopted in the method, the supporting system does not invade the safety limit of train driving when in use, and can allow various construction trains to pass, the adjustable supporting system finishes the supporting of templates and newly built concrete of the defect windowing parts of the arch tops through longitudinal beams, upright posts, arch rings and the like, the lifting adjusting mechanism consisting of sleeves and adjusting screws is used for positioning and reinforcing the templates, and the two ends of the adjustable supporting system are erected on the side walls and the cover plates of ditch at two sides of a tunnel when in installation, so that the passing width of the trains can be ensured, the arch rings are tightly attached to lining templates of the arch parts of the tunnel, and the system height can meet various train passing requirements.
The method has scientific design and reasonable working procedures, effectively solves the problems of short concrete construction time and rapid construction time of the vault of the tunnel, ensures that the short concrete construction of the vault of the tunnel has sufficient time, and avoids the problems of concrete cracking and the like caused by early form removal after pouring.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application.
FIG. 1 is a schematic diagram of an adjustable support system in the method of the present application.
Fig. 2 is a right side view of fig. 1.
Fig. 3 is an enlarged view of a portion a in fig. 1.
In the figure: 1-longitudinal beam, 2-upright post, 3-steel plate, 4-diagonal bracing beam, 5-hinged plate, 6-backing plate, 7-chute, 8-arch ring, 9-sleeve, 10-adjusting screw rod and 11-fixture block.
Detailed Description
For a better understanding of the present application, reference will be made to the following description of the application taken in conjunction with the accompanying drawings and examples. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.
A railway tunnel two-lining defect repairing construction method comprises the following steps:
1) Stirring and transporting of defect-eliminating concrete
The defect-eliminating concrete adopts fine stone concrete, improves the grade compared with the original design lining concrete, is intensively mixed by a mixing station, and is transported to a construction site by a conventional concrete tank truck;
2) Special concrete rail tank car for eliminating defects and upper track
The concrete track tank truck has the same structure as a conventional concrete tank truck, and the difference is that four groups of wheels of the concrete track tank truck adopt track wheels matched with a track, and the concrete track tank truck is hoisted to the track by a crane, so that the track-feeding work of the concrete track tank truck is completed;
3) Transferring the defect-eliminating concrete into a concrete rail tank car
After the concrete rail tank truck is on the road, the defect eliminating concrete in the conventional concrete tank truck is transferred into the concrete rail tank truck through the concrete hanging barrel, and then the concrete rail tank truck is transported to a pouring place;
4) Construction of adjustable supporting system at defect repairing point of two lining in tunnel
An adjustable supporting system is arranged in the tunnel, and the tunnel arch template is supported and stressed through the adjustable supporting system;
5) Pouring and curing of defect-eliminating concrete
After the construction of the adjustable support system is finished, pouring and maintaining the defect eliminating concrete at the defect position of the second lining of the tunnel can be carried out through the concrete rail tank truck;
6) Removal of an adjustable support system
And after the lack-eliminating concrete reaches a certain strength, the template and the adjustable supporting system are removed.
In the above method, the structure of the adjustable supporting system in the step 4) is described in detail, in this description, the dimension parameter of the adjustable supporting system is designed by taking a longitudinal 3m defect windowing as an example, the structure of the adjustable supporting system is shown in fig. 1 and 2, and the adjustable supporting system comprises a left longitudinal beam 1 and a right longitudinal beam 1 which are arranged in parallel, and the longitudinal beam 1 is made of I16I-steel, and has a length of 3000mm.
Four stand columns 2 which are arranged at intervals are uniformly distributed and fixed at the bottom of each longitudinal beam 1, the stand columns 2 are made of I16I-steel, the total height of the stand columns 2 is 4.4m, each stand column is divided into two sections, the length of each section is 2.2m, and 10mm steel plates 3 are fully welded at the joints of the two sections and are connected through high-strength bolts; the joints of the longitudinal beams 1 and the upright posts 2 are fully welded with 10mm steel plates 3 and are connected through high-strength bolts; every interval between every two adjacent stands 2 is 933mm to be provided with a length between two adjacent stands 2 and be 2474 mm's diagonal bracing beam 4, diagonal bracing beam 4 adopts the angle steel preparation to form, and the connected mode between diagonal bracing beam 4 and the stand 2 specifically does: the upright post 2 is fixedly provided with a hinged plate 5, and the end part of the diagonal bracing beam 4 is hinged with the hinged plate 5 through a connecting bolt; three diagonal bracing beams 4 are arranged among the four upright posts 2 in the same row, and the three diagonal bracing beams 4 are sequentially connected end to end and are arranged in a zigzag mode.
A base plate 6 is fixed at the bottom end of each upright post 2, and the base plate 6 is made of a steel plate with the thickness of 10 mm.
A chute 7 which is arranged along the length direction of each longitudinal beam 1 and is provided with an upward notch is fixed at the top of each longitudinal beam 1; nine parallel and spaced arch rings 8 are arranged between the left longitudinal beam 1 and the right longitudinal beam 1 in a crossing way, the arch rings 8 are made of I10I-steel, and the interval between the adjacent arch rings 8 is 350mm; the arc of the arch ring 8 is set according to the angle of the tunnel vault, for example, the arc is designed to be 144 degrees, and the arc is matched with the tunnel vault.
The two end parts of each arch ring 8 are respectively fixed with a sleeve 9 with a down-facing nozzle, the inner wall of each sleeve 9 is provided with connecting threads, the inner threads of the sleeve 9 are connected with an adjusting screw rod 10 in threaded fit with the inner threads of the sleeve 9, the bottom end part of each adjusting screw rod 10 is fixed with a clamping block 11, and the clamping blocks 11 are slidably clamped in the corresponding sliding grooves 7, as shown in fig. 3.
When the adjustable supporting system is installed in a tunnel, upright posts 2 are fixedly installed on the ditch walls and the cover plates at two sides, adjacent upright posts 2 are connected by adopting diagonal bracing beams 4, longitudinal beams 1, sliding grooves 7 and adjusting screw rods 10 are fixedly installed at the upper parts of the upright posts 2, and then arch rings 8 are installed; after the arch ring 8 is installed, the height of the arch ring 8 is adjusted through the adjusting screw rod 10, so that the arch ring 8 supports the arch part template and bears force.
The foregoing has been a clear and complete description of the technical solutions of embodiments of the present application, and the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Claims (5)
1. A railway tunnel secondary lining defect repairing construction method is characterized by comprising the following steps:
1) Stirring and transporting of defect-eliminating concrete
The defect-eliminating concrete adopts fine stone concrete, improves the grade compared with the original design lining concrete, is intensively mixed by a mixing station, and is transported to a construction site by a conventional concrete tank truck;
2) Special concrete rail tank car for eliminating defects and upper track
The concrete track tank truck has the same structure as a conventional concrete tank truck, and the difference is that four groups of wheels of the concrete track tank truck adopt track wheels matched with a track, and the concrete track tank truck is hoisted to the track by a crane, so that the track-feeding work of the concrete track tank truck is completed;
3) Transferring the defect-eliminating concrete into a concrete rail tank car
After the concrete rail tank truck is on the road, the defect eliminating concrete in the conventional concrete tank truck is transferred into the concrete rail tank truck through the concrete hanging barrel, and then the concrete rail tank truck is transported to a pouring place;
4) Construction of adjustable supporting system at defect repairing point of two lining in tunnel
The adjustable supporting system comprises a left longitudinal beam and a right longitudinal beam which are arranged in parallel, wherein a plurality of stand columns which are arranged at intervals are uniformly distributed and fixed at the bottom of each longitudinal beam, and a chute which is arranged along the length direction of each longitudinal beam and is provided with an upward notch is fixed at the top of each longitudinal beam; a plurality of parallel arch rings which are arranged at intervals are arranged between the left longitudinal beam and the right longitudinal beam in a crossing way, a sleeve with a down-arranged nozzle is fixed at the end part of each arch ring, an adjusting screw rod is connected to the sleeve in a threaded manner, a clamping block is fixed at the end part of the bottom end of the adjusting screw rod, and the clamping block is clamped in a sliding groove at the corresponding side in a sliding way;
when the adjustable supporting system is installed, firstly, the upright posts are fixedly installed on the ditch walls and the cover plates at two sides, the longitudinal beams, the sliding grooves and the adjusting screw rods are fixedly installed at the upper parts of the upright posts, and then the arch ring is installed; after the arch ring is installed, the height of the arch ring is adjusted through the adjusting screw rod, so that the arch ring props against the arch part template and is stressed;
5) Pouring and curing of defect-eliminating concrete
After the construction of the adjustable support system is finished, pouring and maintaining the defect eliminating concrete at the defect position of the second lining of the tunnel can be carried out through the concrete rail tank truck;
6) Removal of an adjustable support system
And after the lack-eliminating concrete reaches a certain strength, the template and the adjustable supporting system are removed.
2. The railway tunnel secondary lining defect repairing construction method according to claim 1, characterized by comprising the following steps: in the adjustable supporting system, one diagonal bracing beam is arranged between every two adjacent upright posts in a plurality of upright posts at the bottom of each longitudinal beam, and all the diagonal bracing beams are sequentially connected end to form a zigzag arrangement.
3. The railway tunnel secondary lining defect repairing construction method according to claim 2, characterized by comprising the steps of: a base plate is fixed at the bottom end part of each upright post.
4. The railway tunnel secondary lining defect repairing construction method according to claim 1, characterized by comprising the following steps: in the adjustable supporting system, a longitudinal beam is made of I16I-steel, and a 10mm steel plate is fully welded at the joint of the longitudinal beam and the upright post and is connected through a high-strength bolt; the upright posts are made of I16I-steel, the total height of the upright posts is 4.4m, the upright posts are divided into two sections, the length of a single section is 2.2m, the joints of the two sections are fully welded with 10mm steel plates and are connected through high-strength bolts, and the interval between adjacent upright posts in the same row is 933mm; the arch ring is made of I10I-steel, the radian of the arch ring is set according to the angle of the vault of the tunnel, and the distance between adjacent arch rings is 350mm.
5. The railway tunnel secondary lining defect repairing construction method according to claim 2, characterized by comprising the steps of: the length of the diagonal bracing beam is 2474mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111105486.1A CN113914896B (en) | 2021-09-22 | 2021-09-22 | Railway tunnel two-lining defect repairing construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111105486.1A CN113914896B (en) | 2021-09-22 | 2021-09-22 | Railway tunnel two-lining defect repairing construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113914896A CN113914896A (en) | 2022-01-11 |
| CN113914896B true CN113914896B (en) | 2023-12-12 |
Family
ID=79235423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111105486.1A Active CN113914896B (en) | 2021-09-22 | 2021-09-22 | Railway tunnel two-lining defect repairing construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113914896B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939114A (en) * | 2014-05-14 | 2014-07-23 | 中铁二局股份有限公司 | Lining construction method for suspension rail type trolley |
| CN204126654U (en) * | 2014-08-28 | 2015-01-28 | 中铁十二局集团第三工程有限公司 | The anti-electric bow member chassis of single-track tunnel spreading open cut tunnel lining construction |
| CN106703834A (en) * | 2016-12-23 | 2017-05-24 | 中建八局第二建设有限公司 | Secondary lining integral formworking construction method for tunnel with super-large cross section |
| CN108506022A (en) * | 2018-03-02 | 2018-09-07 | 辽宁西北供水有限责任公司 | A kind of long range jacked piles with small section concrete transportation and lining construction method |
| CN109681266A (en) * | 2018-12-25 | 2019-04-26 | 中铁六局集团天津铁路建设有限公司 | Heavy grade inclined shaft concrete transportation method |
| CN110966022A (en) * | 2019-12-24 | 2020-04-07 | 中铁隧道局集团有限公司工程试验分公司 | Railway tunnel lining construction method based on medium-high fluidity concrete |
| CN111520145A (en) * | 2020-04-29 | 2020-08-11 | 中铁七局集团有限公司 | Underground excavation tunnel primary support slope adjusting and arch changing construction method |
| CN111997655A (en) * | 2020-09-22 | 2020-11-27 | 中铁隧道局集团有限公司 | Construction method of concrete double-lining formwork trolley capable of rotating in tunnel |
-
2021
- 2021-09-22 CN CN202111105486.1A patent/CN113914896B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939114A (en) * | 2014-05-14 | 2014-07-23 | 中铁二局股份有限公司 | Lining construction method for suspension rail type trolley |
| CN204126654U (en) * | 2014-08-28 | 2015-01-28 | 中铁十二局集团第三工程有限公司 | The anti-electric bow member chassis of single-track tunnel spreading open cut tunnel lining construction |
| CN106703834A (en) * | 2016-12-23 | 2017-05-24 | 中建八局第二建设有限公司 | Secondary lining integral formworking construction method for tunnel with super-large cross section |
| CN108506022A (en) * | 2018-03-02 | 2018-09-07 | 辽宁西北供水有限责任公司 | A kind of long range jacked piles with small section concrete transportation and lining construction method |
| CN109681266A (en) * | 2018-12-25 | 2019-04-26 | 中铁六局集团天津铁路建设有限公司 | Heavy grade inclined shaft concrete transportation method |
| CN110966022A (en) * | 2019-12-24 | 2020-04-07 | 中铁隧道局集团有限公司工程试验分公司 | Railway tunnel lining construction method based on medium-high fluidity concrete |
| CN111520145A (en) * | 2020-04-29 | 2020-08-11 | 中铁七局集团有限公司 | Underground excavation tunnel primary support slope adjusting and arch changing construction method |
| CN111997655A (en) * | 2020-09-22 | 2020-11-27 | 中铁隧道局集团有限公司 | Construction method of concrete double-lining formwork trolley capable of rotating in tunnel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113914896A (en) | 2022-01-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111254796B (en) | Single-side integral hoisting long-span overbridge for multiple railway business lines and construction method | |
| WO2021189746A1 (en) | Rapid construction structure and method for secondary lining of multiple variable-cross-section bored tunnels | |
| CN108360380B (en) | Bridge pier column construction operation platform and construction method thereof | |
| CN209799969U (en) | A integrally lift up cantilever formwork device for quick construction shaft lining cutting | |
| CN110513126A (en) | A kind of tunnel double-lining trolley that section-variable can be recycled | |
| CN104400898A (en) | Vertical integral forming mould of novel prefabricated concrete segment and forming method thereof | |
| CN113235472A (en) | Concrete placement platform truck is contained to apron | |
| CN111119071A (en) | Construction method for assembling precast concrete segment box girder | |
| CN111455852A (en) | Assembling method of movable formwork for bridge construction | |
| CN112942106A (en) | Construction method of portal cable tower | |
| CN110700105B (en) | Synchronous construction method for high pier column and tie beam and template used in same | |
| CN114657884B (en) | Construction method of descending movable formwork for bridge abutment assembly and sectional propulsion | |
| CN117027859A (en) | Tunnel lining double-trolley combined device and integral pouring construction method | |
| CN109629439B (en) | Construction method of single-tower cable-stayed bridge | |
| WO2022142193A1 (en) | Construction method for large-span thin-wall concrete sound barrier pouring trolley | |
| CN212336714U (en) | Self-propelled truss supporting template | |
| CN113914896B (en) | Railway tunnel two-lining defect repairing construction method | |
| CN111140254A (en) | Full-circle double-lining inverted arch construction template system for long-distance tunnel and template transferring method | |
| CN109778700B (en) | Cast-in-place trough beam three-point sliding pushing construction method for crossing existing road | |
| CN216238142U (en) | Cast-in-place roof beam of complicated topography wholeization construction falsework | |
| CN215629391U (en) | Railway prestressing force RPC simply supported T roof beam hydraulic template | |
| CN112610244B (en) | Prefabricated part for expanding existing elevated operation subway station platform and installation method thereof | |
| CN212003212U (en) | Two lining quick construction structures in multiple variable cross section undercut tunnel | |
| CN212316712U (en) | Box culvert construction is with assembled platform truck | |
| CN112458912A (en) | Walking type trolley and installation method and construction method thereof |
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 |