CN112282794B - Tunnel lining construction process - Google Patents
Tunnel lining construction process Download PDFInfo
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- CN112282794B CN112282794B CN202011126853.1A CN202011126853A CN112282794B CN 112282794 B CN112282794 B CN 112282794B CN 202011126853 A CN202011126853 A CN 202011126853A CN 112282794 B CN112282794 B CN 112282794B
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- tunnel
- annular
- steel bar
- construction process
- reinforcing steel
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- 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
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
Abstract
The invention relates to a tunnel lining construction process, which comprises the following steps: the method comprises the steps of sleeving a plurality of annular reinforcing steel bars and annular pulling pieces on U-shaped reinforcing steel bars to form a plurality of reinforcing steel bar net pieces, arranging a plurality of embossments which are formed by cold stamping and calendaring and protrude outwards on the outer peripheral surfaces of the annular pulling pieces, dividing a tunnel into a plurality of unit hole sections, paving the reinforcing steel bar net pieces on the inner wall of each unit hole section by section along the extending direction of the tunnel, binding two adjacent reinforcing steel bar net pieces together by adopting steel wires, pouring concrete on each unit hole section by section, and forming a lining layer on the inner wall of the tunnel after the concrete is condensed. By adopting the technical scheme of the invention, the reinforcing mesh sheet is manufactured outside the tunnel in advance, so that the construction efficiency of tunnel lining is improved, dust in the tunnel and the health hazard to workers are reduced, the binding power or friction between the annular pulling sheet and concrete or mortar is increased by arranging the embossing on the surface of the annular pulling sheet, and the strength and construction quality of the lining layer are improved.
Description
Technical Field
The invention belongs to the field of building construction, and particularly relates to a tunnel lining construction process.
Background
The tunnel lining construction is a common construction process, the construction speed of the tunnel lining has great influence on the progress and safety of the project, and the binding of reinforcing mesh sheets in the tunnel is often used for restricting the lining construction speed. At present, the steel mesh binding and welding of tunnel lining are mostly carried out in a tunnel, and the binding and welding efficiency of the steel mesh is very low due to the influence of space and illumination. In addition, dust and smoke generated in the process of binding and welding a large number of steel bars are difficult to dissipate in the holes, and the health of field workers is seriously endangered. In addition, in the existing lining construction process, the common pulling pieces are mostly smooth surfaces, and the adhesive force or the friction force between the pulling pieces and the masonry concrete or mortar is insufficient, so that the strength and the construction quality of the lining layer are influenced.
Disclosure of Invention
In order to solve the technical problems, the invention provides a tunnel lining construction process.
The invention is realized by the following technical scheme.
The invention provides a tunnel lining construction process, which comprises the following steps:
providing a plurality of U-shaped steel bars, sleeving a plurality of annular steel bars on each U-shaped steel bar in parallel, sleeving an annular pull piece between two adjacent annular steel bars on each U-shaped steel bar to obtain a plurality of steel bar net pieces, arranging a plurality of embossments which protrude outwards and are formed by cold stamping and calendaring processing on the outer peripheral surface of each annular pull piece, dividing the tunnel into a plurality of unit tunnel sections, paving the steel bar net pieces on the inner wall of each unit tunnel section by section along the extending direction of the tunnel, binding two adjacent steel bar net pieces together by using steel wires, pouring concrete on each unit tunnel section by section, and forming a lining layer on the inner wall of the tunnel after the concrete is condensed.
The thickness of the ring-shaped pull tab is delta, the embossing protrusion height is h, and the delta and the h satisfy the following relation: h is more than or equal to delta and less than or equal to 2.5 delta.
The embossing protrusion height is 1mm to 3mm.
The two adjacent embossing arrangement positions are staggered with each other in the circumferential direction of the annular pull piece and the width direction of the annular pull piece respectively.
The number of each U-shaped steel bar sleeved with the annular steel bars in parallel is 8 to 12, the annular steel bars are sleeved on the U-shaped steel bars at equal intervals, and the interval between every two adjacent annular steel bars is 250mm to 350mm.
The nominal diameter of the U-shaped reinforcing steel bar is larger than that of the annular reinforcing steel bar.
The nominal diameter of the annular reinforcing steel bar is more than phi 10 mm.
The thickness of the lining layer is less than 500mm.
The lap joint length of two adjacent reinforcing bar net pieces is more than 200 mm.
The length of the unit hole is less than 50m.
The invention has the beneficial effects that: by adopting the technical scheme of the invention, the reinforcing mesh is prepared outside the tunnel in advance by adopting the U-shaped reinforcing steel bars, the annular reinforcing steel bars and the annular pulling pieces, so that the operation process flow in the tunnel is reduced, the tunnel lining construction efficiency is improved, dust and smoke generated in the processing process of the reinforcing mesh can be prevented from being left in the tunnel, the health hazard to field workers is reduced, in addition, the surface of the annular pulling pieces is provided with the embossing, the cohesive force or friction force between the annular pulling pieces and the masonry concrete or mortar is increased, and the strength and the construction quality of the lining layer are improved.
Drawings
FIG. 1 is a schematic view of the structure of a tunnel lining of the present invention;
FIG. 2 is a schematic view of the construction of the mesh of the present invention;
FIG. 3 is a front view of the ring pull tab of the present invention.
In the figure: 1-U-shaped steel bar, 2-annular steel bar, 3-annular pull piece, 4-steel bar net piece, 5-concrete, 6-lining layer and 31-embossing.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
As shown in fig. 1, 2 and 3, the invention provides a tunnel lining construction process, which comprises the following steps:
providing a plurality of U-shaped reinforcing steel bars 1, firstly, sleeving a plurality of annular reinforcing steel bars 2 in parallel on each U-shaped reinforcing steel bar 1, then sleeving an annular pull sheet 3 between two adjacent annular reinforcing steel bars 2 on each U-shaped reinforcing steel bar 1 to obtain a plurality of reinforcing steel bar net sheets 4, arranging a plurality of embossments 31 which are formed by cold stamping and calendaring and protrude outwards on the outer peripheral surface of each annular pull sheet 3, dividing the tunnel into a plurality of unit tunnel sections, paving the reinforcing steel bar net sheets 4 on the inner wall of each unit tunnel section by section along the extending direction of the tunnel, binding the two adjacent reinforcing steel bar net sheets 4 together by adopting steel wires, pouring concrete 5 on each unit tunnel section by section, and forming a lining layer 6 on the inner wall of the tunnel after the concrete 5 is condensed.
Further, the ring-shaped pull tab 3 has a tab thickness δ and the embossment 31 has a protrusion height h, and δ and h satisfy the following relationship: h is more than or equal to delta and less than or equal to 2.5 delta. It is preferable that the embossing 31 has a projection height of 1mm to 3mm. The arrangement positions of two adjacent embossings 31 are staggered with each other in the circumferential direction of the ring-shaped pull tab 3 and the width direction of the ring-shaped pull tab 3, respectively. By adopting the technical scheme of the invention, the annular pull sheet is provided with the embossing structure, so that the adhesive force and the friction force between the annular pull sheet and concrete or lining mortar are greatly enhanced, the strength of the lining layer is improved, the defects of cracking, hollowing and the like of the lining layer can be effectively prevented, the lining construction quality is improved, the annular pull sheet is processed and finished outside the tunnel in advance, the construction period is shortened, and the construction efficiency is improved.
In addition, the number of the annular reinforcing steel bars 2 sleeved on each U-shaped reinforcing steel bar 1 in parallel is 8-12, the annular reinforcing steel bars 2 are sleeved on the U-shaped reinforcing steel bars 1 at equal intervals, and the interval between every two adjacent annular reinforcing steel bars 2 is 250-350 mm. The nominal diameter of the U-shaped reinforcing steel bar 1 is larger than that of the annular reinforcing steel bar 2. The nominal diameter of the annular reinforcing steel bar 2 is more than phi 10 mm.
Furthermore, the lining layer 6 is less than 500mm thick. The overlapping length of two adjacent reinforcing mesh sheets 4 is more than 200 mm. The length of the unit hole is less than 50m.
By adopting the technical scheme of the invention, the reinforcing mesh is prepared outside the tunnel in advance by adopting the U-shaped reinforcing steel bars, the annular reinforcing steel bars and the annular pulling pieces, so that the operation process flow in the tunnel is reduced, the tunnel lining construction efficiency is improved, dust and smoke generated in the processing process of the reinforcing mesh can be prevented from being left in the tunnel, the health hazard to field workers is reduced, in addition, the surface of the annular pulling pieces is provided with the embossing, the cohesive force or friction force between the annular pulling pieces and the masonry concrete or mortar is increased, and the strength and the construction quality of the lining layer are improved.
Claims (7)
1. A tunnel lining construction process is characterized in that: the method comprises the following steps:
providing a plurality of U-shaped steel bars (1), sleeving a plurality of annular steel bars (2) in parallel on each U-shaped steel bar (1), sleeving an annular pull sheet (3) between two adjacent annular steel bars (2) on each U-shaped steel bar (1) to obtain a plurality of steel bar net sheets (4), arranging a plurality of embossments (31) which are formed by cold stamping and calendaring and protrude outwards on the outer peripheral surface of each annular pull sheet (3), dividing the tunnel into a plurality of unit tunnel sections, paving the steel bar net sheets (4) on the inner wall of each unit tunnel section by section along the extending direction of the tunnel, binding the two adjacent steel bar net sheets (4) together by adopting steel wires, pouring concrete (5) on each unit tunnel section by section, and forming a lining layer (6) on the inner wall of the tunnel after the concrete (5) is condensed; the thickness of the ring-shaped pull sheet (3) is delta, the protruding height of the embossing (31) is h, and the delta and the h satisfy the following relation: delta is not less than h and not more than 2.5 delta, the protruding height of the embosses (31) is 1mm to 3mm, and the arrangement positions of two adjacent embosses (31) are staggered with each other in the circumferential direction of the annular pull piece (3) and the width direction of the annular pull piece (3).
2. The tunnel lining construction process of claim 1, wherein: the number of each U-shaped steel bar (1) sleeved with the annular steel bars (2) in parallel is 8-12, the annular steel bars (2) are sleeved on the U-shaped steel bars (1) at equal intervals, and the interval between every two adjacent annular steel bars (2) is 250-350 mm.
3. The tunnel lining construction process of claim 1, wherein: the nominal diameter of the U-shaped reinforcing steel bar (1) is larger than that of the annular reinforcing steel bar (2).
4. The tunnel lining construction process of claim 3, wherein: the nominal diameter of the annular reinforcing steel bar (2) is more than phi 10 mm.
5. The tunnel lining construction process of claim 1, wherein: the thickness of the lining layer (6) is less than 500mm.
6. The tunnel lining construction process of claim 1, wherein: the lap length of two adjacent steel mesh sheets (4) is more than 200 mm.
7. The tunnel lining construction process of claim 1, wherein: the length of the unit hole is less than 50m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011126853.1A CN112282794B (en) | 2020-10-20 | 2020-10-20 | Tunnel lining construction process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011126853.1A CN112282794B (en) | 2020-10-20 | 2020-10-20 | Tunnel lining construction process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112282794A CN112282794A (en) | 2021-01-29 |
| CN112282794B true CN112282794B (en) | 2022-11-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011126853.1A Active CN112282794B (en) | 2020-10-20 | 2020-10-20 | Tunnel lining construction process |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2235465Y (en) * | 1995-08-03 | 1996-09-18 | 齐克先 | Composite steel wire screen framework hollow sandwich wall plate |
| JP2001159300A (en) * | 1999-12-01 | 2001-06-12 | Shimizu Corp | Tunneling method and reinforcement unit for tunneling work |
| CN201714073U (en) * | 2010-07-21 | 2011-01-19 | 李林 | Light material module used as concrete floor module and filler |
| CN110792068A (en) * | 2019-11-09 | 2020-02-14 | 黄河勘测规划设计研究院有限公司 | Fabricated reinforced pipe sheet for rapid lining of horseshoe tunnel and assembling method |
| CN210530854U (en) * | 2019-10-12 | 2020-05-15 | 黄河勘测规划设计研究院有限公司 | Assembled steel reinforcement cage for rapid lining of tunnel |
| CN111441791A (en) * | 2020-05-09 | 2020-07-24 | 黄河勘测规划设计研究院有限公司 | City portal tunnel lining |
-
2020
- 2020-10-20 CN CN202011126853.1A patent/CN112282794B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2235465Y (en) * | 1995-08-03 | 1996-09-18 | 齐克先 | Composite steel wire screen framework hollow sandwich wall plate |
| JP2001159300A (en) * | 1999-12-01 | 2001-06-12 | Shimizu Corp | Tunneling method and reinforcement unit for tunneling work |
| CN201714073U (en) * | 2010-07-21 | 2011-01-19 | 李林 | Light material module used as concrete floor module and filler |
| CN210530854U (en) * | 2019-10-12 | 2020-05-15 | 黄河勘测规划设计研究院有限公司 | Assembled steel reinforcement cage for rapid lining of tunnel |
| CN110792068A (en) * | 2019-11-09 | 2020-02-14 | 黄河勘测规划设计研究院有限公司 | Fabricated reinforced pipe sheet for rapid lining of horseshoe tunnel and assembling method |
| CN111441791A (en) * | 2020-05-09 | 2020-07-24 | 黄河勘测规划设计研究院有限公司 | City portal tunnel lining |
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| Publication number | Publication date |
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| CN112282794A (en) | 2021-01-29 |
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