CN109505609B - Bracket-free construction method for underground comprehensive pipe rack of shallow-buried underground excavation city and comprehensive pipe rack - Google Patents
Bracket-free construction method for underground comprehensive pipe rack of shallow-buried underground excavation city and comprehensive pipe rack Download PDFInfo
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- CN109505609B CN109505609B CN201811392723.5A CN201811392723A CN109505609B CN 109505609 B CN109505609 B CN 109505609B CN 201811392723 A CN201811392723 A CN 201811392723A CN 109505609 B CN109505609 B CN 109505609B
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- 238000009412 basement excavation Methods 0.000 title claims abstract description 44
- 238000010276 construction Methods 0.000 title claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 101
- 239000010959 steel Substances 0.000 claims abstract description 101
- 239000004567 concrete Substances 0.000 claims abstract description 12
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 12
- 238000005192 partition Methods 0.000 claims abstract description 6
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract 4
- 238000005266 casting Methods 0.000 claims description 3
- 230000001502 supplementing effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009933 burial Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009435 building construction Methods 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
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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
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
-
- 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
- E21D11/14—Lining predominantly with metal
- E21D11/28—Longitudinal struts, i.e. longitudinal connections between adjoining arches
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to a bracket-free construction method of a shallow-buried underground excavation urban underground comprehensive pipe gallery and the comprehensive pipe gallery, wherein the method comprises the following steps: determining the number and positions of small pilot tunnels excavated step by step according to the number and positions of cabins designed by the pipe gallery; constructing an initial support after each excavation and footage of the small pilot tunnel is completed, arranging a permanent vertical steel support at the superposition position of the excavation boundary and the vertical intermediate wall, and respectively connecting the upper end and the lower end of the permanent vertical steel support with a grid steel frame or a steel arch in the initial support of the small pilot tunnel; and after the primary support of the small pilot tunnel is completed, a secondary lining is applied, permanent vertical steel supports are complementarily configured according to design requirements, a threaded reinforcing steel mesh is arranged between adjacent permanent vertical steel supports, the threaded reinforcing steel mesh is connected with the permanent vertical steel supports, the permanent vertical steel supports are used as a framework to pour the concrete of the intermediate wall, so that a reinforced concrete intermediate wall is formed, and then the reinforced concrete intermediate wall, the primary support and the secondary lining form a pipe gallery structure. The invention improves the structural strength of the middle partition wall while avoiding dismantling the steel support.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a bracket-free construction method of a shallow-buried underground excavation urban underground comprehensive pipe rack and the comprehensive pipe rack.
Background
The urban underground utility tunnel is an emerging infrastructure construction block in recent years, and the urban underground utility tunnel intensively lays and manages various municipal pipelines, thereby improving the management efficiency. Because the pipe gallery is generally shallow in burial depth and large in section, when the shallow burial and underground excavation method is adopted, the pipe gallery is divided into a plurality of small pilot tunnels for excavation, and temporary supports are erected at the same time. Before the second lining is applied, the temporary support is removed. The temporary support is mounted and dismounted, so that the cost is increased, engineering machinery cannot be adopted due to the limitation of the temporary support, and the excavation progress is severely restricted.
Disclosure of Invention
The invention aims to provide a bracket-free construction method of a shallow-buried underground excavation urban underground comprehensive pipe gallery and the comprehensive pipe gallery, which avoid frequent installation and disassembly of temporary brackets, reduce construction cost and improve construction progress.
The invention provides a bracket-free construction method of a shallow underground excavation urban underground comprehensive pipe gallery, which comprises the following steps:
step 1, determining the number and positions of small pilot tunnels excavated step by step according to the number and positions of cabins designed by a pipe gallery;
step 2, constructing an initial support after each excavation and footage of the small pilot tunnel is completed, arranging a permanent vertical steel support at the superposition position of the excavation boundary and the vertical intermediate wall to form a vertical temporary construction support, and respectively connecting the upper end and the lower end of the permanent vertical steel support with a grid steel frame or a steel arch in the initial support of the small pilot tunnel;
and 3, performing secondary lining after the primary support of the small pilot tunnel is completed, supplementing and configuring permanent vertical steel supports according to design requirements, arranging a twisted steel mesh between adjacent permanent vertical steel supports, connecting the twisted steel mesh with the permanent vertical steel supports, pouring the permanent vertical steel supports as a framework into the middle partition wall concrete to form a reinforced concrete middle partition wall, and further forming a pipe gallery structure with the primary support and the secondary lining.
Further, the number of permanent vertical steel supports is determined according to the magnitude of the vertical load.
Further, the permanent vertical steel support adopts H-shaped steel or double angle steel.
The invention also provides a shallow underground excavation urban underground comprehensive pipe gallery, which comprises a plurality of small pilot holes excavated step by step, wherein a plurality of permanent vertical steel supports are arranged at the superposition positions of the excavation boundaries of the small pilot holes and the vertical intermediate wall, and the upper and lower ends of the permanent vertical steel supports are respectively connected with a grid steel frame or a steel arch in the primary support of the small pilot holes;
a thread steel bar net is arranged between the adjacent permanent vertical steel supports, the thread steel bar net is connected with the permanent vertical steel supports, the permanent vertical steel supports are used as frameworks for casting concrete, a reinforced concrete intermediate wall is formed, and the reinforced concrete intermediate wall, the primary support and the secondary lining form a pipe gallery structure.
Further, the number of permanent vertical steel supports is determined according to the magnitude of the vertical load.
Further, the permanent vertical steel support adopts H-shaped steel or double angle steel.
By means of the scheme, the shoveless construction method of the underground comprehensive pipe rack in the shallow-buried underground excavation city and the comprehensive pipe rack, the construction load is borne by the permanent vertical steel support arranged on the intermediate wall, the temporary support is achieved, the secondary lining concrete is directly poured into the intermediate wall when the secondary lining concrete is to be poured, and the structural strength of the intermediate wall is improved while the steel support is prevented from being removed.
The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is a first construction state diagram of a shallow underground excavation urban underground utility tunnel according to an embodiment of the present invention;
FIG. 2 is a second construction state diagram of a shallow underground excavation urban utility tunnel according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a fully constructed shallow underground excavation urban underground utility tunnel in accordance with an embodiment of the present invention.
Reference numerals in the drawings:
1-pilot hole in advance; 2-a backward guide hole; 3-primary support; 4-permanent vertical steel support; 5-secondary lining.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
The embodiment provides a bracket-free construction method of a shallow-buried underground excavation urban underground comprehensive pipe gallery, which comprises the following steps:
and step 1, determining the number and positions of small pilot tunnels excavated step by step according to the number and positions of cabins designed by the pipe gallery. For example, a double-deck pipe gallery excavates with two small pilot holes, a three-deck pipe gallery excavates with three small pilot holes, and the boundary of each small pilot hole coincides with the intermediate wall after the pipe gallery is completed.
And 2, constructing an initial support after the small pilot tunnel is excavated and footed each time, arranging a permanent vertical steel support at the superposition position of the excavation boundary and the vertical intermediate wall to form a vertical temporary construction support, and connecting the upper end and the lower end of the permanent vertical steel support with a grid steel frame or a steel arch in the initial support of the small pilot tunnel respectively so as to bear construction load.
And 3, performing secondary lining after the primary support of the small pilot tunnel is completed, supplementing and configuring permanent vertical steel supports according to design requirements, arranging a twisted steel mesh between adjacent permanent vertical steel supports, connecting the twisted steel mesh with the permanent vertical steel supports, pouring the permanent vertical steel supports as a framework into the middle wall concrete (without dismantling the steel supports), forming a reinforced concrete middle wall, and further forming a pipe gallery structure with the primary support and the secondary lining.
By the support-free construction method for the shallow underground excavation urban underground comprehensive pipe gallery, the work of installing, dismantling, transporting outwards and the like of a temporary support in the existing construction method is completely avoided while the safety of pipe gallery excavation is ensured, engineering materials are saved, meanwhile, labor cost is reduced, excavation circulation time is shortened, and construction progress is accelerated.
In this embodiment, the number of permanent vertical steel supports (erected per excavation cycle) is determined according to the magnitude of the vertical load.
In this embodiment, the permanent vertical steel support is H-section steel or double angle steel.
The embodiment also provides a shallow underground excavation urban underground comprehensive pipe gallery, which comprises a plurality of small pilot holes excavated step by step, wherein a plurality of permanent vertical steel supports are arranged at the superposition positions of the excavation boundaries of the small pilot holes and the vertical intermediate wall, and the upper ends and the lower ends of the permanent vertical steel supports are respectively connected with a grid steel frame or a steel arch in the primary support of the small pilot holes;
a thread steel bar net is arranged between the adjacent permanent vertical steel supports, the thread steel bar net is connected with the permanent vertical steel supports, the permanent vertical steel supports are used as frameworks for casting concrete, a reinforced concrete intermediate wall is formed, and the reinforced concrete intermediate wall, the primary support and the secondary lining form a pipe gallery structure.
Through this shallow underground excavation urban underground utility tunnel, when guaranteeing the piping lane excavation safety, avoided the installation of interim support in the current utility tunnel completely, demolishd and outward fortune scheduling work, reduced the labour cost when practicing thrift engineering material to shortened excavation cycle time, accelerated the construction progress, simultaneously, improved the structural strength of median wall.
In this embodiment, the number of permanent vertical steel supports (erected per excavation cycle) is determined according to the magnitude of the vertical load.
In this embodiment, the permanent vertical steel support is H-section steel or double angle steel.
Referring to fig. 1 to 3, the construction method will be described below by taking a double deck pipe gallery as an example, and the construction steps of the double deck pipe gallery include:
(1) According to the arrangement of the pipe gallery cabins, the whole excavation section is divided into two parts, two pilot tunnels are excavated step by step, and the size and the position of each pilot tunnel are consistent with the positions of the cabins.
(2) The pilot tunnel 1 is excavated, after the excavation footage is completed each time, an initial support 3 is constructed, a permanent vertical steel support 4 is erected to form a vertical temporary construction support for bearing vertical load in the construction process, the permanent vertical steel support 4 is required to be ensured to be vertical, and the vertical axis of the permanent vertical steel support is coincident with the axis of the intermediate wall.
(3) And excavating the backward pilot tunnel 2, constructing an initial support 3 after each circulation footage is completed, and erecting a permanent vertical steel support 4 to form a vertical temporary construction support.
(4) And after the pilot tunnel is tunneled for a sufficient distance, pouring the concrete of the secondary lining 5, and pouring the concrete on the permanent vertical steel support 4 (section steel) of the intermediate wall to form the reinforced concrete intermediate wall.
Through the construction method, the whole section of the pipe gallery is divided into corresponding small pilot tunnel excavation according to cabin arrangement, and permanent vertical steel supports are arranged at the intermediate wall after each cycle of excavation is completed. When the secondary lining is poured, the permanent vertical steel support is directly poured into concrete as an intermediate wall framework to be used as a part of the intermediate wall structure. The structural strength of the middle partition wall is improved while the steel support is prevented from being dismantled.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and it should be noted that it is possible for those skilled in the art to make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.
Claims (6)
1. The bracket-free construction method of the shallow underground excavation urban underground comprehensive pipe gallery is characterized by comprising the following steps of:
step 1, determining the number and positions of small pilot tunnels excavated step by step according to the number and positions of cabins designed by a pipe gallery;
step 2, constructing an initial support after each excavation and footage of the small pilot tunnel is completed, arranging a permanent vertical steel support at the superposition position of the excavation boundary and the vertical intermediate wall to form a vertical temporary construction support, and connecting the upper end and the lower end of the permanent vertical steel support with a grid steel frame or a steel arch in the initial support of the small pilot tunnel respectively;
and 3, performing secondary lining after the primary support of the small pilot tunnel is completed, supplementing and configuring permanent vertical steel supports according to design requirements, arranging a twisted steel mesh between adjacent permanent vertical steel supports, connecting the twisted steel mesh with the permanent vertical steel supports, pouring the permanent vertical steel supports as a framework into the middle partition wall concrete to form a reinforced concrete middle partition wall, and further forming a pipe gallery structure with the primary support and the secondary lining.
2. The bracket-free construction method of the shallow underground excavation urban underground utility tunnel of claim 1, wherein the number of permanent vertical steel supports is determined according to the magnitude of vertical load.
3. The bracket-free construction method of the shallow underground excavation urban underground utility tunnel of claim 1, wherein the permanent vertical steel support is H-shaped steel or double-angle steel.
4. The utility model provides a shallow underground excavation urban underground utility tunnel which is characterized in that the utility tunnel comprises a plurality of small pilot tunnels excavated step by step, a plurality of permanent vertical steel supports are arranged at the superposition position of the excavation boundary of the small pilot tunnels and a vertical intermediate wall, and the upper end and the lower end of each permanent vertical steel support are respectively connected with a grid steel frame or a steel arch in the primary support of the small pilot tunnels;
a screw thread reinforcing steel mesh is arranged between the adjacent permanent vertical steel supports, the screw thread reinforcing steel mesh is connected with the permanent vertical steel supports, the permanent vertical steel supports are used as frameworks for casting concrete to form reinforced concrete intermediate walls, and the reinforced concrete intermediate walls, the primary supports and the secondary lining form a pipe gallery structure.
5. The shallow-buried underground excavation urban utility tunnel of claim 4, wherein the number of permanent vertical steel supports is determined based on the magnitude of the vertical load.
6. The shallow-buried underground excavation urban utility tunnel of claim 4, wherein the permanent vertical steel support is H-section steel or double angle steel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811392723.5A CN109505609B (en) | 2018-11-21 | 2018-11-21 | Bracket-free construction method for underground comprehensive pipe rack of shallow-buried underground excavation city and comprehensive pipe rack |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811392723.5A CN109505609B (en) | 2018-11-21 | 2018-11-21 | Bracket-free construction method for underground comprehensive pipe rack of shallow-buried underground excavation city and comprehensive pipe rack |
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| Publication Number | Publication Date |
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| CN109505609A CN109505609A (en) | 2019-03-22 |
| CN109505609B true CN109505609B (en) | 2023-11-14 |
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| CN201811392723.5A Active CN109505609B (en) | 2018-11-21 | 2018-11-21 | Bracket-free construction method for underground comprehensive pipe rack of shallow-buried underground excavation city and comprehensive pipe rack |
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| CN110617079A (en) * | 2019-10-28 | 2019-12-27 | 中铁二院工程集团有限责任公司 | Shield comprehensive pipe gallery pipeline installation shed frame system |
| CN110714791A (en) * | 2019-10-29 | 2020-01-21 | 中国十七冶集团有限公司 | Method for shallow-buried and underground-excavated two-lining waterproof rapid construction in comprehensive pipe gallery engineering |
| CN111188640B (en) * | 2020-01-16 | 2021-08-31 | 中国十七冶集团有限公司 | Underground pipe gallery shallow-buried underground tunnel waterproof plate installation trolley and construction method thereof |
| CN111828051B (en) * | 2020-07-28 | 2022-04-15 | 中建七局安装工程有限公司 | Construction method of two-lining middle partition wall injection tunnel with support |
| CN112065451B (en) * | 2020-09-14 | 2022-06-28 | 中国建筑第八工程局有限公司 | Underground excavation method for underground passage |
| CN113339000A (en) * | 2021-06-03 | 2021-09-03 | 上海市城市建设设计研究总院（集团）有限公司 | Cable steel pipe shell trenchless supporting structure with intermediate wall and construction method |
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