CN107100648B - Auxiliary facility and method for tunnel plain concrete lining construction - Google Patents
Auxiliary facility and method for tunnel plain concrete lining construction Download PDFInfo
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- CN107100648B CN107100648B CN201710487187.6A CN201710487187A CN107100648B CN 107100648 B CN107100648 B CN 107100648B CN 201710487187 A CN201710487187 A CN 201710487187A CN 107100648 B CN107100648 B CN 107100648B
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- 238000010276 construction Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title description 13
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 134
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 87
- 239000010959 steel Substances 0.000 claims abstract description 87
- 230000000452 restraining effect Effects 0.000 claims abstract description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 28
- 230000002787 reinforcement Effects 0.000 claims description 9
- 239000011241 protective layer Substances 0.000 claims description 7
- 238000009415 formwork Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 8
- 239000010410 layer Substances 0.000 description 7
- 230000000903 blocking effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (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 discloses an auxiliary facility for tunnel plain concrete lining, which comprises a reinforcing mesh bench for supporting reinforcing meshes, reinforcing mesh fixing pieces for transversely restraining the reinforcing meshes and reinforcing mesh cushion blocks, wherein the reinforcing mesh bench is arranged on the reinforcing mesh bench; the steel bar mesh rack is arranged at the front end of the template trolley, and the lower part of the steel bar mesh rack is matched with the trolley travelling track; the embedded longitudinal bars are longitudinally embedded at the opening ends of the poured secondary lining, and are longitudinally connected with the steel bar meshes; the reinforcing mesh fixing piece is arranged on the template trolley in a contractible manner; the reinforcing mesh cushion blocks are arranged between the reinforcing mesh and the template trolley at intervals. The invention also provides a tunnel plain concrete lining construction method, which lays the steel bar meshes on the arch part of the formwork trolley with a narrow space through the steel bar mesh rack, avoids the arrangement of a circular fixed steel frame, can greatly reduce the consumption of steel bars in the lining and saves engineering investment.
Description
Technical Field
The invention relates to the technical field of tunnel construction, in particular to an auxiliary facility and method for tunnel plain concrete lining construction.
Background
With the great development of traffic engineering such as railways, highways and the like in China, the number of newly-built tunnels is greatly increased. According to the structural stress requirement, when the stability of the surrounding stratum of the tunnel is good, plain concrete lining without reinforcing steel bars can be adopted. Because most of the inside of the tunnel is cool and moist, and the shrinkage influence of the concrete is added, the tunnel lining is easy to generate cracks, especially the side wall part is easier to generate, the cracks gradually develop and spread, and finally the thickness of the structure can be cracked, so that the water leakage disease is caused, the cracking is further aggravated, and finally the safety is influenced.
After the plain concrete lining section tunnel is excavated, in order to avoid the influence of groundwater leakage during operation, a waterproof layer 3 is generally arranged in the tunnel structure, and a composite structure of an initial support 2, a waterproof layer 3, a plain concrete secondary lining 4 is formed, as shown in fig. 1. The composite structure has the phenomenon of cracking and blocking of plain concrete of the arch part in the use process, influences the operation safety of railways and highways, and can reduce the risk of blocking of concrete due to the arrangement of the reinforcing mesh at the arch part.
Referring to fig. 2, a waterproof layer 3 is arranged between a plain concrete lining 4 and an primary support 2, so that the waterproof layer is damaged and the construction is complicated when a reinforcing mesh 6 is directly fixed on a surrounding rock 1. The existing installation method of the reinforcing mesh 6 is that steel frames 5 (of three limbs or four limbs) are arranged at intervals on the inner side of the waterproof layer 3, and the reinforcing mesh 6 is fixed on the steel frames 5. Although the existing installation structure and installation method can achieve the purpose of fixing the reinforcing mesh 6, the following problems still exist:
(1) In order to fix the reinforcing mesh 6, the steel frame 5 is required to be landed, namely, the part of the reinforcing mesh 6 is not required to be arranged, and the steel frame 5 is also required to be arranged;
(2) The steel mesh 6 has smaller rigidity and the steel frame 5 is required to be arranged according to the interval L.
The construction method leads to the fact that the plain concrete lining needs to be provided with the steel frame in a spacing annular mode to form a reinforced concrete-like structure, so that a large amount of steel materials are consumed, and the design of the plain concrete lining is not easy.
Disclosure of Invention
The invention aims to provide an auxiliary facility for tunnel plain concrete lining construction, which can reduce the usage amount of reinforcing steel bars while ensuring convenient construction.
In order to achieve the above purpose, the auxiliary facility for tunnel plain concrete lining designed by the invention comprises a reinforcing steel bar mesh bench for supporting reinforcing steel bar meshes, pre-buried longitudinal reinforcing steel bars for longitudinally connecting the reinforcing steel bar meshes, reinforcing steel bar mesh fixing pieces for transversely restraining the reinforcing steel bar meshes and reinforcing steel bar mesh cushion blocks; the steel bar mesh rack is arranged at the front end of the template trolley, and the lower part of the steel bar mesh rack is matched with the trolley travelling track; the embedded longitudinal bars are longitudinally embedded at the opening ends of the poured secondary lining, and are longitudinally connected with the steel bar meshes; the reinforcing mesh fixing piece is arranged on the template trolley in a contractible manner; the reinforcing mesh cushion blocks are arranged between the reinforcing mesh and the template trolley at intervals.
As a preferable scheme, the transverse section outline of the reinforcing mesh rack is matched with the outer outline of the transverse section of the template trolley, a plurality of reinforcing mesh rack connection section steel which is longitudinally distributed is arranged on the reinforcing mesh rack, and the reinforcing mesh rack connection section steel is longitudinally connected with the front end and the rear end of the reinforcing mesh rack.
As a preferable scheme, the reinforcing mesh cushion blocks are arranged at the reinforcing intersection points on the reinforcing mesh at intervals and fixedly connected with the reinforcing mesh, and the height of the reinforcing mesh cushion blocks is matched with the thickness of the reinforcing mesh protective layer in the plain concrete secondary lining to be poured.
The invention aims to provide a tunnel plain concrete lining construction method, which can reduce the usage amount of reinforcing steel bars while ensuring convenient construction.
In order to achieve the above purpose, the tunnel plain concrete lining construction method designed by the invention comprises the following steps: (a) Longitudinal steel bars are longitudinally pre-embedded at the opening end of the poured secondary lining of the tunnel; (b) A reinforcing steel bar net rack capable of longitudinally moving along a trolley travelling track is arranged at the front end of the template trolley; (c) After the steel bar mesh rack reaches the lower part of the secondary lining of the plain concrete to be poured, paving a steel bar mesh to be installed on the steel bar mesh rack, and fixedly connecting the steel bar mesh to be installed with the embedded longitudinal steel bars along the longitudinal direction; (d) A reinforcing mesh cushion block is arranged between the reinforcing mesh to be installed and the template trolley at intervals; (e) Simultaneously moving the reinforcing mesh sheet rack and the template trolley along the trolley travelling rail until the reinforcing mesh sheet to be installed is completely paved on the template trolley; (f) Arranging a retractable reinforcing mesh fixing piece on the template trolley to transversely restrict the reinforcing mesh to be installed; (g) And pouring plain concrete for secondary lining, and shrinking the reinforcing mesh fixing piece.
In the step (d), the reinforcing mesh pad is arranged at a reinforcing cross point of the reinforcing mesh to be installed and is fixedly connected with the reinforcing mesh, and the height of the reinforcing mesh pad is matched with the thickness of the reinforcing mesh protection layer in the secondary lining of the plain concrete to be poured.
In the step (c), the reinforcing mesh to be installed is preferably welded to the embedded longitudinal bars in the longitudinal direction.
Preferably, the method further comprises the steps of: (h) And after the concrete to be poured into the plain concrete secondary lining meets the strength requirement, removing the mould and moving the template trolley.
The beneficial effects of the invention are as follows: according to the auxiliary facility and the method for tunnel plain concrete lining construction, disclosed by the invention, the reinforcing steel bar meshes are paved on the arch part of the template trolley with a narrow space longitudinally through the reinforcing steel bar meshes rack which can move along the trolley travelling rail by utilizing the characteristic that the template trolley moves along the lining travelling rail.
Drawings
Fig. 1 is a schematic view of a longitudinal section structure of a conventional plain concrete lining reinforcing mesh after installation.
Fig. 2 is a schematic diagram of a transverse cross-sectional structure of the plain concrete lining reinforcing mesh sheet of the tunnel in fig. 1 after installation.
Fig. 3 is a schematic view showing a longitudinal sectional structure of a reinforced mesh sheet after installation in a construction method of a plain concrete lining of a tunnel according to a preferred embodiment of the present invention.
Fig. 4 is an enlarged schematic view of the portion a in fig. 3.
Fig. 5 is a schematic view showing a transverse cross-sectional structure of a reinforced mesh sheet after installation in a construction method of a plain concrete lining of a tunnel according to a preferred embodiment of the present invention.
Fig. 6 is a schematic view showing a transverse cross-sectional structure of a reinforcing mesh pad installed in a construction method of a plain concrete lining of a tunnel according to a preferred embodiment of the present invention.
The reference numerals of the components in the drawings are as follows: surrounding rock 1, primary support 2, waterproof layer 3, plain concrete secondary lining 4, steelframe 5, reinforcing bar net piece 6, reinforcing bar net piece rack 7, template trolley 8, trolley running track 9, reinforcing bar net piece rack connection shaped steel 10, poured secondary lining 11, to-be-poured plain concrete secondary lining 12, pre-buried longitudinal bars 13, reinforcing bar net piece fixing piece 14 and reinforcing bar net piece cushion 15.
Detailed Description
The invention will now be described in further detail with reference to the drawings and to specific examples.
The template trolley is a special equipment designed and manufactured for improving the surface smoothness and lining speed of tunnel lining and reducing the labor intensity. The template trolley is a large steel structure template system supported by a combined steel structure portal frame, and the motor drives the travelling mechanism to drive the template trolley to travel along a tunnel, so that the template trolley has the characteristics of low cost, reliable structure, convenient operation, high lining speed, good tunnel forming surface and the like, and is widely used in tunnel construction of highways, railways, hydropower, urban subways and the like. The template trolley is used in the tunnel, so that construction interference can be avoided, construction efficiency is improved, more importantly, lining construction quality in the tunnel is greatly improved, and meanwhile, the mechanization degree of tunnel construction is also improved.
The invention provides an auxiliary facility for tunnel plain concrete lining construction and a method for tunnel plain concrete lining construction by adopting the auxiliary facility, which are based on the working principle of the template trolley, for installing a reinforcing steel bar net sheet of a tunnel plain concrete lining arch part by adopting a reasonable method to achieve the purposes of simple operation, rapid construction, reducing the consumption of reinforcing steel bars and saving engineering investment. In the auxiliary facility and the method for tunnel plain concrete lining construction, the reinforcing mesh is firstly paved at the front end of the template trolley by utilizing the reinforcing mesh rack, and finally the reinforcing mesh is arranged above the template trolley along with the translation of the reinforcing mesh rack. The auxiliary facilities and the method for tunnel plain concrete lining construction according to the present invention will be described in detail with reference to fig. 3, 4, 5 and 6.
Referring to fig. 3, 4, 5 and 6, the auxiliary facilities for tunnel plain concrete lining construction comprise a reinforcing mesh rack 7, reinforcing mesh rack connection section steel 10, reinforcing mesh fixing pieces 14 and reinforcing mesh cushion blocks 15.
The reinforcing bar net piece rack 7 sets up the front end at template platform truck 8, and the transversal cross section outline of reinforcing bar net piece rack 7 is the same with the transversal cross section outline of template platform truck 8, and the lower part and the platform truck of reinforcing bar net piece rack 7 walk track 9 phase-match, and reinforcing bar net piece rack 7 can follow platform truck and walk track 9 and remove. In order to better accept the reinforcing mesh 6, the reinforcing mesh rack 7 is provided with a plurality of reinforcing mesh rack connecting section steel 10 which are longitudinally distributed, the reinforcing mesh rack connecting section steel 10 is longitudinally connected with the front end and the rear end of the reinforcing mesh rack 7, and the reinforcing mesh 6 to be installed is placed on the longitudinally movable reinforcing mesh rack 7.
The embedded longitudinal steel bars 13 are embedded in the poured secondary lining 11, and the embedded longitudinal steel bars 13 are longitudinally connected with the steel bar meshes 6 to be installed. By means of the reinforcing mesh frame 7 and the embedded longitudinal reinforcing bars 13, the reinforcing mesh 6 is vertically supported and longitudinally restrained.
The reinforcing mesh cushion blocks 15 are arranged on the reinforcing mesh 6 at intervals and are fixedly connected with the reinforcing mesh 6. More specifically, a reinforcing mesh pad 15 is arranged between the reinforcing intersection point on the reinforcing mesh 6 and the reinforcing mesh rack 7 at intervals, the reinforcing mesh pad 15 ensures the interval between the reinforcing mesh rack 7 and the reinforcing mesh 6, and the height of the reinforcing mesh pad 15 is matched with the thickness of the protective layer of the reinforcing mesh 6 in the plain concrete secondary lining 12 to be poured, so that the thickness of the protective layer of the reinforcing mesh 6 is ensured.
When the template trolley 8 and the reinforcing mesh rack 7 move forward along the trolley running track 9 in the longitudinal direction, the reinforcing mesh 6 is longitudinally restrained by being connected with the poured secondary lining 11 through the embedded reinforcing bars 13, so that the reinforcing mesh can gradually slide on the reinforcing mesh rack 7 and finally be paved above the template trolley 8.
The reinforcing mesh fixing piece 14 is arranged on the template trolley 8 to transversely restrain the reinforcing mesh 6 and prevent the reinforcing mesh 6 from transversely moving. The reinforcing mesh fixing piece 14 is a retractable piece and is in a retracted state before the reinforcing mesh 6 moves to the template trolley 8, and extends after the reinforcing mesh 6 moves to the adjusted position on the template trolley 8; after the casting of the plain concrete secondary lining 12 to be cast is completed and before the concrete is solidified, the reinforcing mesh fixing pieces 14 are contracted onto the formwork trolley 8. To this end, the reinforcing mesh 6 is constrained in the transverse, longitudinal and vertical directions.
The auxiliary facility for tunnel plain concrete lining construction utilizes the pre-buried longitudinal steel bars 13 to longitudinally limit the steel bar meshes 6 to be installed, the steel bar meshes 6 are supported by the steel bar mesh table frame 7 from the lower side, the steel bar mesh cushion block 15 is adopted to ensure the thickness of the protective layer of the steel bar meshes 6, the steel bar meshes 6 are transferred onto the template table frame 8 from the steel bar mesh table frame 7 by utilizing the template table frame 8 and the common movement of the steel bar mesh table frame 7, and pouring can be started after the steel bar meshes 6 are completely placed on the template table frame 8 and then the steel bar meshes 6 are transversely restrained by the steel bar mesh fixing pieces 14.
As apparent from the above description, the tunnel plain concrete lining construction method of the present invention comprises the steps of:
(1) Longitudinal bars 13 are pre-buried at the opening end of the poured secondary lining 11 and serve as longitudinal restraint members of the reinforcing mesh 6 to be installed subsequently.
(2) The front end of the template trolley 8 is provided with a reinforcing mesh rack 7, the transverse section outline of the reinforcing mesh rack 7 is the same as the transverse section outline of the template trolley 8, the lower part of the reinforcing mesh rack 7 is matched with the trolley running track 9, and the reinforcing mesh rack 7 can move along the trolley running track 9. The steel bar net rack 7 is provided with a plurality of steel bar net rack connecting section steel 10 which are longitudinally distributed, the steel bar net rack connecting section steel 10 is longitudinally connected with the front end and the rear end of the steel bar net rack 7, and the steel bar net 6 to be installed is supported on the steel bar net rack 7.
(3) After the reinforcing mesh sheet bench 7 is in place (below the position where the plain concrete secondary lining 12 is to be poured), the reinforcing mesh sheet 6 is paved on the reinforcing mesh sheet bench 7 and welded with the embedded longitudinal reinforcing steel bars 13 in the poured secondary lining 11, and the reinforcing mesh sheet 6 is longitudinally restrained. If the reinforcement mesh needs to be arranged in the secondary lining of the next cycle, the pre-buried longitudinal reinforcement reserved in the reinforcement mesh of the next cycle can be used as a longitudinal restraint of the reinforcement mesh of the next cycle.
(4) The reinforcing steel mesh cushion blocks 15 are arranged between the reinforcing steel crossing points on the reinforcing steel mesh 6 and the reinforcing steel mesh rack 7 at intervals, the reinforcing steel mesh cushion blocks 15 are fixedly connected with the reinforcing steel mesh 6, and the height of the reinforcing steel mesh cushion blocks 15 ensures the thickness of the protective layer of the reinforcing steel mesh 6 in the later concrete pouring process.
(5) After the reinforcing mesh 6 is paved, the reinforcing mesh rack 7 and the template trolley 8 are moved simultaneously, the reinforcing mesh 6 gradually slides onto the template trolley 8 from the reinforcing mesh rack 7, and finally, the reinforcing mesh 6 is completely paved on the template trolley 8.
(6) A retractable reinforcing mesh fixing piece 14 is arranged at the upper part of the template trolley 8, and the reinforcing mesh 6 is transversely restrained by the reinforcing mesh fixing piece 14.
(7) After the reinforcing steel bar net sheet 6 is paved and fixed on the template trolley 8, a plain concrete secondary lining 12 to be poured can be poured, the longitudinal reinforcing steel bars required by the next circulation are pre-buried, and the reinforcing steel bar net sheet fixing piece 14 is contracted.
(8) After the concrete of the plain concrete secondary lining 12 to be poured meets the strength requirement, the template trolley 8 can be disassembled and moved or the installation of the reinforcement mesh of the next cycle (section) can be carried out.
The tunnel plain concrete lining construction method combines the characteristics of tunnel construction, utilizes the characteristic that the template trolley moves along the lining running track, and lays the reinforcement mesh on the arch part of the template trolley with narrow space longitudinally through the reinforcement mesh rack which can move along the trolley running track.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (2)
1. An auxiliary facility for tunnel plain concrete lining construction, which is characterized in that: the steel mesh support comprises a steel mesh rack (7) for supporting a steel mesh (6), embedded longitudinal steel bars (13) longitudinally connected with the steel mesh (6), a steel mesh fixing piece (14) for transversely restraining the steel mesh (6) and a steel mesh cushion block (15); the steel bar mesh rack (7) is arranged at the front end of the template trolley (8), and the lower part of the steel bar mesh rack (7) is matched with the trolley travelling rail (9); the embedded longitudinal steel bars (13) are longitudinally embedded at the opening end of the poured secondary lining (11), and the embedded longitudinal steel bars (13) are longitudinally connected with the steel bar net sheet (6); the reinforcing mesh fixing piece (14) is arranged on the template trolley (8) in a contractible manner; the reinforcing mesh cushion blocks (15) are arranged between the reinforcing mesh (6) and the template trolley (8) at intervals; the transverse section outline of the steel bar net rack (7) is matched with the outer outline of the transverse section of the template trolley (8), a plurality of steel bar net rack connecting section steels (10) which are longitudinally distributed are arranged on the steel bar net rack (7), and the steel bar net rack connecting section steels (10) are longitudinally connected with the front end and the rear end of the steel bar net rack (7); the steel bar mesh cushion blocks (15) are arranged at the steel bar crossing points on the steel bar mesh (6) at intervals and fixedly connected with the steel bar mesh (6), and the height of the steel bar mesh cushion blocks (15) is matched with the thickness of the steel bar mesh (6) protective layer in the plain concrete secondary lining (12) to be poured.
2. A tunnel plain concrete lining construction method using the auxiliary facility for tunnel plain concrete lining construction as claimed in claim 1, comprising the steps of:
(a) Longitudinal steel bars (13) are longitudinally embedded at the opening end of the poured secondary lining (11) of the tunnel;
(b) A reinforcing steel mesh rack (7) capable of longitudinally moving along a trolley travelling rail (9) is arranged at the front end of the template trolley (8);
(c) After the steel bar mesh rack (7) reaches the lower part of the secondary lining (12) of plain concrete to be poured, paving a steel bar mesh (6) to be installed on the steel bar mesh rack (7), and fixedly connecting the steel bar mesh (6) to be installed with the embedded longitudinal steel bars (13) along the longitudinal direction;
(d) A reinforcing mesh cushion block (15) is arranged between the reinforcing mesh (6) to be installed and the template trolley (8) at intervals;
(e) Simultaneously, the reinforcement mesh rack (7) and the template trolley (8) are moved along the trolley travelling rail (9) until the reinforcement mesh (6) to be installed is completely paved on the template trolley (8);
(f) A retractable reinforcing mesh fixing piece (14) is arranged on the template trolley (8) to transversely restrict the reinforcing mesh (6) to be installed;
(g) Pouring to form a plain concrete secondary lining (12) and shrinking the reinforcing mesh fixing piece (14);
(h) After the concrete of the plain concrete secondary lining (12) to be poured meets the strength requirement, removing the mould and moving the template trolley (8);
in the step (c), the reinforcing mesh (6) to be installed is longitudinally welded and connected with the embedded longitudinal reinforcing bars (13);
in the step (d), the reinforcing mesh pad (15) is arranged at a reinforcing intersection point of the reinforcing mesh (6) to be installed and is fixedly connected with the reinforcing mesh (6), and the height of the reinforcing mesh pad (15) is matched with the thickness of a protective layer of the reinforcing mesh (6) in the plain concrete secondary lining (12) to be poured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710487187.6A CN107100648B (en) | 2017-06-23 | 2017-06-23 | Auxiliary facility and method for tunnel plain concrete lining construction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710487187.6A CN107100648B (en) | 2017-06-23 | 2017-06-23 | Auxiliary facility and method for tunnel plain concrete lining construction |
Publications (2)
| Publication Number | Publication Date |
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| CN107100648A CN107100648A (en) | 2017-08-29 |
| CN107100648B true CN107100648B (en) | 2024-03-12 |
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| CN201710487187.6A Active CN107100648B (en) | 2017-06-23 | 2017-06-23 | Auxiliary facility and method for tunnel plain concrete lining construction |
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| CN (1) | CN107100648B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110185469B (en) * | 2019-06-18 | 2021-09-21 | 中铁隆工程集团有限公司 | Control method for steel bar protection layer of tunnel secondary lining structure |
| CN114017057B (en) * | 2021-11-11 | 2023-05-02 | 中铁十二局集团有限公司 | Construction method for cast-in-situ concrete wind channel separator of plateau railway tunnel double-lane trackless transportation auxiliary tunnel |
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| US3522685A (en) * | 1967-04-06 | 1970-08-04 | Georgi Oroschakoff | Mesh reinforcement for reinforced concrete structures |
| CH674546A5 (en) * | 1987-12-08 | 1990-06-15 | Jean Bernold | Construction of reinforced concrete wall in tunnel - whereby concrete is sprayed over mesh direct on to rock face |
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| CN107100648A (en) | 2017-08-29 |
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