CN113914896A - Construction method for treating defects of secondary lining of railway tunnel - Google Patents
Construction method for treating defects of secondary lining of railway tunnel Download PDFInfo
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- CN113914896A CN113914896A CN202111105486.1A CN202111105486A CN113914896A CN 113914896 A CN113914896 A CN 113914896A CN 202111105486 A CN202111105486 A CN 202111105486A CN 113914896 A CN113914896 A CN 113914896A
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- 238000010276 construction Methods 0.000 title claims abstract description 39
- 230000007547 defect Effects 0.000 title claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 239000004575 stone Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 12
- 230000008030 elimination Effects 0.000 abstract description 6
- 238000003379 elimination reaction Methods 0.000 abstract description 6
- 238000005336 cracking Methods 0.000 abstract description 2
- 238000009415 formwork Methods 0.000 abstract description 2
- 238000009418 renovation Methods 0.000 abstract 1
- 238000003756 stirring Methods 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000009432 framing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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 OR ROCK 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 OR ROCK 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
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to a construction method for overcoming defects of a secondary lining of a railway tunnel, belonging to the technical field of tunnel construction. The method comprises the working procedures of stirring and transporting the defect-eliminating concrete, a special concrete track tank car for the defect elimination and a loading way, transferring the defect-eliminating concrete into the concrete track tank car, constructing an adjustable support system at a defect treatment point of a secondary lining in a tunnel, pouring and maintaining the defect-eliminating concrete, and dismantling the adjustable support system. The invention has compact and compact arrangement of all procedures, greatly shortens the renovation time through parallel operation, adopts an adjustable support 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 process, effectively solves the problems of tunnel defect elimination and warehouse crown concrete construction time bin promotion, ensures sufficient time for tunnel vault defect elimination concrete construction, and avoids the problems of concrete cracking and the like caused by early formwork removal after pouring.
Description
Technical Field
The invention belongs to the technical field of tunnel construction, and particularly relates to a construction method for repairing defects of a secondary lining of a railway tunnel.
Background
With the accelerated construction of large-scale basic projects such as railways in China, the construction and construction of tunnel engineering are very common, and due to the shortage of railway tunnel construction period, the tunnel defect eliminating construction often has cross operation with the constructions of electrification, frame laying and the like. At present, the defect elimination of the vault is to close the tunnel by utilizing the time gap of the incapability of a construction train in units of electrification, laying and the like, to erect a full hall type scaffold reinforcing template and pour lining concrete at the defect part, and to remove the scaffold to recover the train passing condition in the tunnel after the concrete reaches the template removal condition. Because the tunnel sealing time is short and generally does not exceed 24 hours, the work of full framing erection, template installation, concrete pouring, waiting for concrete strength, form removal and the like is completed in the period, the time is very short, the workload is very high, and the construction quality is greatly influenced.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a construction method for treating the defects of a secondary lining of a railway tunnel. The method of the invention utilizes an adjustable support system and the close connection between the working procedures to shorten the occupation of the driving space of the tunnel by the defect construction of the secondary lining of the tunnel as much as possible, and is particularly suitable for the construction of the single-track railway tunnel.
The invention is realized by the following technical scheme:
a construction method for repairing defects of a secondary lining of a railway tunnel comprises the following steps:
1) mixing and transporting of scarless concrete
The scarcity concrete is fine stone concrete, is improved by one grade compared with the lining concrete of the original design, is intensively mixed by a mixing station and is transported to a construction site by a conventional concrete tank truck;
2) concrete rail tank car special for eliminating defect and upper road
The concrete track tank car has basically the same structure as a conventional concrete tank car, and is characterized in that four groups of wheels of the concrete track tank car adopt track wheels matched with tracks, and the concrete track tank car is hoisted and hoisted to the tracks by hoisting, so that the track-climbing work of the concrete track tank car is completed;
3) the scarcity-eliminating concrete is transferred into a concrete track tank car
After the concrete track tank truck goes up, the concrete hoisting barrel is used for transferring the scarcity concrete in the conventional concrete tank truck into the concrete track tank truck, and then the concrete track tank truck is transported to a pouring place;
4) construction of adjustable support system at defect-repairing point of two linings in tunnel
The adjustable supporting system comprises a left longitudinal beam and a right longitudinal beam which are arranged in parallel, a plurality of upright posts which are arranged at intervals are uniformly distributed and fixed at the bottom of each longitudinal beam, and a sliding groove 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 arranged at intervals are arranged between the left longitudinal beam and the right longitudinal beam in a spanning manner, a sleeve with a downward barrel opening 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 on the corresponding side in a sliding manner;
when the adjustable supporting system is installed, the upright posts are fixedly installed on ditch walls and cover plates on two sides, the upper parts of the upright posts are fixedly provided with the longitudinal beams, the sliding chutes and the adjusting screw rods, and then the arch rings are installed; after the arch ring is installed, the height of the arch ring is adjusted through an adjusting screw rod, and the arch ring props up the arch part template and is stressed;
5) pouring and maintaining of defect-eliminating concrete
After the construction of the adjustable supporting system is finished, the concrete track tank car can be used for pouring and maintaining the defect eliminating concrete at the secondary lining of the tunnel;
6) removal of adjustable support system
And after the concrete reaches a certain strength, the template and the adjustable supporting system are dismantled.
Furthermore, in the adjustable supporting system, an inclined supporting beam is arranged between every two adjacent upright columns in the plurality of upright columns at the bottom of each longitudinal beam, and all the inclined supporting beams are sequentially connected end to form a zigzag arrangement.
Furthermore, in the adjustable supporting system, a base plate is fixed at the end part of the bottom end of each upright post.
Furthermore, in the adjustable supporting system, the longitudinal beam is made of I16I-shaped steel, and a 10mm steel plate is fully welded at the node of the longitudinal beam and the upright column and is connected with the upright column through a high-strength bolt; the upright columns are made of I16I-shaped steel, the total height of the upright columns is 4.4m, the upright columns are divided into two sections, the length of a single section is 2.2m, 10mm steel plates are fully welded at the nodes of the two sections and are connected through high-strength bolts, and the distance between adjacent upright columns in the same row is 933 mm; the arch ring is made of I10I-steel, the radian of the arch ring is set according to the angle of the arch crown of the tunnel, and the distance between every two adjacent arch rings is 350 mm.
Furthermore, in the adjustable supporting system, the length of the inclined supporting beam is 2474 mm.
The method adopts an adjustable supporting system which does not intrude the safety limit of train running and can allow various construction trains to pass when in use, the adjustable supporting system completes the support of the template at the arch crown defect windowing part and newly-built concrete through longitudinal beams, upright posts, arch rings and the like, a lifting adjusting mechanism consisting of a sleeve and an adjusting screw rod is used for positioning and reinforcing the template, and two ends of the adjustable supporting system are erected on the side walls and cover plates of ditches at two sides of a tunnel during installation, so that the passing width of the train can be ensured, the arch rings are tightly attached to tunnel arch lining templates, and the system height can meet the passing requirements of various trains.
The method has scientific design and reasonable process, effectively solves the problems of tunnel defect elimination and warehouse crown concrete construction time bin promotion, ensures sufficient time for tunnel vault defect elimination concrete construction, and avoids the problems of concrete cracking and the like caused by early formwork removal after pouring.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate exemplary embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic structural diagram of an adjustable support system in the method of the present invention.
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 column, 3-steel plate, 4-inclined supporting beam, 5-hinged plate, 6-backing plate, 7-sliding chute, 8-arch ring, 9-sleeve, 10-adjusting screw rod and 11-clamping block.
Detailed Description
In order that those skilled in the art will better understand the present invention, a more complete and complete description of the present invention is provided below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
A construction method for repairing defects of a secondary lining of a railway tunnel comprises the following steps:
1) mixing and transporting of scarless concrete
The scarcity concrete is fine stone concrete, is improved by one grade compared with the lining concrete of the original design, is intensively mixed by a mixing station and is transported to a construction site by a conventional concrete tank truck;
2) concrete rail tank car special for eliminating defect and upper road
The concrete track tank car has basically the same structure as a conventional concrete tank car, and is characterized in that four groups of wheels of the concrete track tank car adopt track wheels matched with tracks, and the concrete track tank car is hoisted and hoisted to the tracks by hoisting, so that the track-climbing work of the concrete track tank car is completed;
3) the scarcity-eliminating concrete is transferred into a concrete track tank car
After the concrete track tank truck goes up, the concrete hoisting barrel is used for transferring the scarcity concrete in the conventional concrete tank truck into the concrete track tank truck, and then the concrete track tank truck is transported to a pouring place;
4) construction of adjustable support system at defect-repairing point of two linings in tunnel
Installing an adjustable supporting system in the tunnel, and supporting and stressing the tunnel arch part template through the adjustable supporting system;
5) pouring and maintaining of defect-eliminating concrete
After the construction of the adjustable supporting system is finished, the concrete track tank car can be used for pouring and maintaining the defect eliminating concrete at the secondary lining of the tunnel;
6) removal of adjustable support system
And after the concrete reaches a certain strength, the template and the adjustable supporting system are dismantled.
In the above method, the structure of the adjustable supporting system described in step 4) is described in detail, in which the dimensional parameters of the adjustable supporting system are designed by taking a longitudinal 3m defect windowing as an example, and the structure of the adjustable supporting system is shown in fig. 1 and fig. 2, and includes two longitudinal beams 1 arranged in parallel, wherein the longitudinal beams 1 are made of I16I-beams, and the length is 3000 mm.
Four upright posts 2 arranged at intervals are uniformly distributed and fixed at the bottom of each longitudinal beam 1, each upright post 2 is made of I16I-shaped steel, the total height of each upright post 2 is 4.4m, the upright post is divided into two sections, the length of each section is 2.2m, and a 10mm steel plate 3 is fully welded at the node of each two sections and is connected through a high-strength bolt; fully welding a 10mm steel plate 3 at the joint of the longitudinal beam 1 and the upright post 2, and connecting the longitudinal beam and the upright post through a high-strength bolt; the interval between every two adjacent stands 2 is 933mm to be provided with a length for 2474 mm's diagonal brace 4 between two adjacent stands 2, diagonal brace 4 adopts the angle steel preparation to form, and the connected mode between diagonal brace 4 and the stand 2 specifically is: a hinged plate 5 is fixed on the upright post 2, and the end part of the inclined supporting beam 4 is hinged with the hinged plate 5 through a connecting bolt; three inclined supporting beams 4 are arranged between the four upright posts 2 in the same row, and the three inclined supporting beams 4 are sequentially connected end to form a saw-toothed arrangement.
The bottom end part of each upright post 2 is fixed with a backing plate 6, and the backing plate 6 is made of a steel plate with the thickness of 10 mm.
The top of each longitudinal beam 1 is fixed with a sliding chute 7 which is arranged along the length direction of the longitudinal beam and provided with an upward notch; nine parallel arch rings 8 arranged at intervals are arranged between the left longitudinal beam 1 and the right longitudinal beam 1 in a spanning manner, the arch rings 8 are made of I10I-steel, and the distance between every two adjacent arch rings 8 is 350 mm; the radian of the arch ring 8 is set according to the angle of the tunnel arch, and if the radian is set to be 144 degrees, the arch ring is matched with the tunnel arch.
A sleeve 9 with a downward-facing cylinder opening is fixed at both end portions of each arch ring 8, a connecting thread is arranged on the inner cylinder wall of the sleeve 9, an adjusting screw rod 10 in threaded fit with the sleeve 9 is connected in a cylinder hole internal thread, a clamping block 11 is fixed at the bottom end portion of the adjusting screw rod 10, and the clamping block 11 is slidably clamped in the sliding groove 7 on the corresponding side, as shown in fig. 3.
When the adjustable supporting system is installed in a tunnel, firstly, the upright posts 2 are fixedly installed on ditch walls and cover plates at two sides, the adjacent upright posts 2 are connected by adopting the inclined supporting beams 4, the upper parts of the upright posts 2 are fixedly provided with the longitudinal beams 1, the sliding chutes 7 and the adjusting screw rods 10, and then the 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, and the arch ring 8 props up the arch part template and is stressed.
The technical solutions in the embodiments of the present invention are clearly and completely described above, and the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (5)
1. A construction method for repairing defects of a secondary lining of a railway tunnel is characterized by comprising the following steps:
1) mixing and transporting of scarless concrete
The scarcity concrete is fine stone concrete, is improved by one grade compared with the lining concrete of the original design, is intensively mixed by a mixing station and is transported to a construction site by a conventional concrete tank truck;
2) concrete rail tank car special for eliminating defect and upper road
The concrete track tank car has basically the same structure as a conventional concrete tank car, and is characterized in that four groups of wheels of the concrete track tank car adopt track wheels matched with tracks, and the concrete track tank car is hoisted and hoisted to the tracks by hoisting, so that the track-climbing work of the concrete track tank car is completed;
3) the scarcity-eliminating concrete is transferred into a concrete track tank car
After the concrete track tank truck goes up, the concrete hoisting barrel is used for transferring the scarcity concrete in the conventional concrete tank truck into the concrete track tank truck, and then the concrete track tank truck is transported to a pouring place;
4) construction of adjustable support system at defect-repairing point of two linings in tunnel
The adjustable supporting system comprises a left longitudinal beam and a right longitudinal beam which are arranged in parallel, a plurality of upright posts which are arranged at intervals are uniformly distributed and fixed at the bottom of each longitudinal beam, and a sliding groove 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 arranged at intervals are arranged between the left longitudinal beam and the right longitudinal beam in a spanning manner, a sleeve with a downward barrel opening 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 on the corresponding side in a sliding manner;
when the adjustable supporting system is installed, the upright posts are fixedly installed on ditch walls and cover plates on two sides, the upper parts of the upright posts are fixedly provided with the longitudinal beams, the sliding chutes and the adjusting screw rods, and then the arch rings are installed; after the arch ring is installed, the height of the arch ring is adjusted through an adjusting screw rod, and the arch ring props up the arch part template and is stressed;
5) pouring and maintaining of defect-eliminating concrete
After the construction of the adjustable supporting system is finished, the concrete track tank car can be used for pouring and maintaining the defect eliminating concrete at the secondary lining of the tunnel;
6) removal of adjustable support system
And after the concrete reaches a certain strength, the template and the adjustable supporting system are dismantled.
2. The railway tunnel secondary lining defect remedying construction method according to claim 1, wherein: in the adjustable supporting system, one inclined supporting beam is arranged between every two adjacent upright columns in the plurality of upright columns at the bottom of each longitudinal beam, and all the inclined supporting beams are sequentially connected end to form a zigzag arrangement.
3. The railway tunnel secondary lining defect remedying construction method according to claim 2, wherein: the bottom end part of each upright post is fixed with a backing plate.
4. The railway tunnel secondary lining defect remedying construction method according to claim 1, wherein: in the adjustable supporting system, the longitudinal beam is made of I16I-shaped steel, and a 10mm steel plate is fully welded at the node of the longitudinal beam and the upright column and is connected through a high-strength bolt; the upright columns are made of I16I-shaped steel, the total height of the upright columns is 4.4m, the upright columns are divided into two sections, the length of a single section is 2.2m, 10mm steel plates are fully welded at the nodes of the two sections and are connected through high-strength bolts, and the distance between adjacent upright columns in the same row is 933 mm; the arch ring is made of I10I-steel, the radian of the arch ring is set according to the angle of the arch crown of the tunnel, and the distance between every two adjacent arch rings is 350 mm.
5. The railway tunnel secondary lining defect remedying construction method according to claim 2, wherein: the length of the raker beam is 2474 mm.
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 |
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| CN113914896A true CN113914896A (en) | 2022-01-11 |
| CN113914896B CN113914896B (en) | 2023-12-12 |
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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 |
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