CN110952985B - Sliding type vertical shaft annular steel support assembly and construction method - Google Patents
Sliding type vertical shaft annular steel support assembly and construction method Download PDFInfo
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- CN110952985B CN110952985B CN201911194827.XA CN201911194827A CN110952985B CN 110952985 B CN110952985 B CN 110952985B CN 201911194827 A CN201911194827 A CN 201911194827A CN 110952985 B CN110952985 B CN 110952985B
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- annular steel
- steel support
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- well
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 131
- 239000010959 steel Substances 0.000 title claims abstract description 131
- 238000010276 construction Methods 0.000 title claims abstract description 35
- 230000002787 reinforcement Effects 0.000 claims description 19
- 239000004567 concrete Substances 0.000 claims description 16
- 238000009412 basement excavation Methods 0.000 claims description 11
- 238000003466 welding Methods 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 239000011378 shotcrete Substances 0.000 claims description 5
- 238000007493 shaping process Methods 0.000 claims 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/11—Lining shafts; Linings therefor with combinations of different materials, e.g. wood, metal, concrete
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/12—Accessories for making shaft linings, e.g. suspended cradles, shutterings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D7/00—Shaft equipment, e.g. timbering within the shaft
- E21D7/02—Arrangement of guides for cages in shafts; Connection of guides for cages to shaft walls
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Wood Science & Technology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a sliding type annular steel support assembly for a vertical shaft, which comprises a fore shaft ring beam, a well wall steel bar and annular steel supports, wherein the fore shaft ring beam, the well wall steel bar and the annular steel supports are arranged in the vertical shaft; after the annular steel support is formed outside the vertical shaft, the annular steel support can be conveyed to the opening of the vertical shaft along the horizontal sliding rail in a sliding mode, after the guide lugs are aligned with the vertical sliding grooves one by one, the annular steel support is pulled out of the horizontal sliding rail, and the annular steel support can penetrate through the locking collar beam and slide to the position of a well wall reinforcing steel bar to be bound and fixed. Meanwhile, the invention also discloses a construction method of the sliding type vertical shaft annular steel support component. The method has the characteristics of safety, reliability, high construction progress, high construction quality and low cost.
Description
Technical Field
The invention relates to the technical field of tunnel vertical shaft construction, in particular to a sliding type vertical shaft annular steel supporting assembly and a construction method thereof.
Background
At present, an annular steel support used for shaft excavation mainly adopts large machinery to hoist a steel member to a foundation pit operation surface, and field assembling and welding are carried out in a shaft. There are major problems: large-scale mechanical hoisting operation and on-site assembling and welding in a vertical shaft have large safety risk; the vertical shaft is assembled, the operation environment is complex, the consistency of products of all annular steel supports is poor, the construction speed is slow, the construction quality is not easy to control, and the construction cost is relatively high; when assembling in the well, next earthwork excavation can not be carried out, and the construction progress is influenced.
Disclosure of Invention
The invention aims to provide a sliding type vertical shaft annular steel supporting component which is safe and reliable, quick in construction progress, high in construction quality and low in cost.
Therefore, the technical scheme adopted by the invention is as follows: a sliding type shaft annular steel support assembly comprises a fore shaft ring beam, a well wall steel bar and annular steel supports, wherein the fore shaft ring beam, the well wall steel bar and the annular steel supports are arranged in a shaft, the fore shaft ring beam is arranged at a well mouth position, the well wall steel bar is bound below the fore shaft ring beam, a horizontal sliding rail is arranged outside the shaft, at least two vertical sliding grooves which are communicated up and down are reserved on the fore shaft ring beam along the circumferential direction, and each annular steel support is provided with a guide lug which corresponds to the vertical sliding grooves on the fore shaft ring beam one to one; after the annular steel support is formed outside the vertical shaft, the annular steel support can be conveyed to the opening of the vertical shaft along the horizontal sliding rail in a sliding mode, after the guide lugs are aligned with the vertical sliding grooves one by one, the annular steel support is pulled out of the horizontal sliding rail, and the annular steel support can penetrate through the locking collar beam and slide to the position of a well wall reinforcing steel bar to be bound and fixed.
Preferably, an assembling field is arranged outside the vertical shaft, and the annular steel support is formed by connecting or welding the guide lugs and the arc-shaped blocks on the assembling field through bolts.
Preferably, the number of the guide lugs and the number of the arc-shaped blocks are four, and every two arc-shaped blocks are spliced through the guide lugs.
More preferably, the horizontal slide rail comprises two slide rail bars which are arranged in parallel at intervals from left to right.
Meanwhile, the invention also provides a construction method of the sliding type vertical shaft annular steel support component, which comprises the following steps:
firstly, carrying out earthwork excavation on a construction site, binding steel bars of a locking collar beam and pouring concrete, completing construction of the locking collar beam, continuing to excavate the earthwork downwards after the construction of the locking collar beam is completed, stopping the earthwork excavation after the earthwork is excavated to the design position of a first annular steel support, and binding a first section of well wall steel reinforcement cage; meanwhile, assembling the first annular steel support in an assembling site;
the locking collar beam is arranged at a wellhead position, and at least two vertical sliding grooves which are communicated up and down are reserved on the locking collar beam along the circumferential direction; the annular steel support is formed by connecting or welding a guide lug and an arc-shaped block through a bolt, the whole annular steel support is annular, and the guide lug corresponds to the vertical sliding groove on the locking collar beam one by one;
secondly, after the horizontal slide rail is in place, the assembled first annular steel support is conveyed to the opening of the vertical shaft in a sliding mode along the horizontal slide rail, the guide lugs are aligned with the vertical slide grooves one by one, finally the horizontal slide rail is pulled out, the annular steel support penetrates through the locking collar beam and slides to the designed position of the first annular steel support, the annular steel support and the first section of well wall reinforcement cage are bound and fixed temporarily, and concrete pouring of the first section of well wall reinforcement cage is carried out;
thirdly, when a second annular steel support is assembled, excavating the earthwork to the design position of the second annular steel support, binding a second section of well wall reinforcement cage, moving the annular steel support in the vertical well downwards to the design position of the next annular steel support, temporarily binding and fixing, sliding the second annular steel support assembled outside the well to the opening of the vertical well through a horizontal sliding rail, and then falling to the design position of the first annular steel support for binding and fixing to finish the concrete pouring of the second section of well wall reinforcement cage; and analogizing until the concrete of the well wall reinforcement cage of all sections is poured, finally binding and fixing all the annular steel supports, and pouring all the annular steel supports.
The invention has the beneficial effects that:
(1) the steel members are not required to be hoisted by large machinery, and the assembled annular steel supports are conveyed to the opening of the vertical shaft by adopting a simple and safe horizontal sliding rail, so that the method is safe and reliable, and the construction cost is reduced;
(2) the annular steel supports are assembled outside the vertical shaft, and field assembling and welding are not needed in the vertical shaft, so that the safety risk of operation is further reduced; the shaft is assembled outside, so that the consistency of the product is easy to control;
(3) when the annular steel supports are assembled outside the vertical shaft, earth excavation and steel bar binding in the shaft are carried out, and the construction speed is accelerated and the construction period is shortened by the mode of synchronous construction outside the shaft in the shaft.
Drawings
FIG. 1 is a top view of the present invention.
Fig. 2 is a simplified perspective view of the invention.
Detailed Description
The invention will be further illustrated by the following examples in conjunction with the accompanying drawings:
referring to fig. 1 and 2, the sliding type annular steel support assembly for the shaft mainly comprises a locking collar beam 1, shaft wall reinforcing steel bars (not shown in the figure), an annular steel support 3, horizontal sliding rails 2 and the like.
The locking collar beam 1, the well wall reinforcing steel bars and the annular steel supports 3 are arranged in the shaft, the annular steel supports 3 are assembled outside the shaft, and then are conveyed to the position of a well mouth in a sliding mode through the horizontal sliding rails 2.
The fore shaft collar tie beam 1 is arranged at a well mouth position, the fore shaft collar tie beam 1 is composed of bound fore shaft collar tie beam reinforcing steel bars and poured concrete, and the fore shaft collar tie beam 1 is used for ensuring the strength of the well mouth position. And the well wall reinforcing steel bars are bound below the locking collar beam 1, and concrete also needs to be poured for ensuring the strength of the well wall.
At least two vertical sliding grooves 1a which are communicated up and down are reserved on the fore shaft ring beam 1 along the circumferential direction, and each annular steel support 3 is provided with a guide lug 3a which is in one-to-one correspondence with the vertical sliding grooves 1a on the fore shaft ring beam 1. And a horizontal sliding rail 2 is arranged outside the shaft.
The annular steel support 3 can be conveyed to the opening part of the vertical shaft along the horizontal sliding rail 2 after being formed in an assembling field outside the vertical shaft. After the guide lugs 3a are aligned with the vertical sliding grooves 1a one by one, the horizontal sliding rails 2 are pulled away, and the annular steel supports 3 can penetrate through the locking collar beams 1 and slide to the position of the well wall reinforcing steel bar for binding and fixing. The wall of a well guarantees intensity jointly through wall of a well ligature reinforcing bar and a plurality of annular steel shotcrete 3 that the interval set up from top to bottom, ligatures the wall of a well reinforcing bar earlier, slides down behind the design position with every annular steel shotcrete 3 again, respectively with wall of a well reinforcing bar ligature fixed back together, carries out concrete placement at last.
An assembling field is arranged outside the vertical shaft, and the annular steel support 3 is formed by connecting or welding the guide lugs 3a and the arc blocks 3b through bolts in the assembling field. Of course, the method is not limited to the assembly mode, and the method can also be integrally formed. The horizontal sliding rail 2 is used as a rail for sliding the assembled annular steel support 3 to the position of a wellhead.
The number of the guide lugs 3a and the number of the arc-shaped blocks 3b are four, and every two arc-shaped blocks 3b are spliced through the guide lugs 3 a. But is not limited to four, and may be three or more. The horizontal sliding rail 2 comprises two sliding rail bars which are arranged in parallel at intervals left and right, and the distance between the two sliding rail bars is larger than the diameter of the annular steel support 3.
A construction method of a sliding type vertical shaft annular steel support assembly comprises the following steps:
firstly, earth excavation is carried out in a construction site, steel bars of the fore shaft ring beam are bound, concrete is poured, and construction of the fore shaft ring beam 1 is completed. Continuing to excavate the earthwork downwards after the construction of the locking collar beam 1 is completed, stopping the earthwork excavation after the earthwork is excavated to the design position of the first annular steel support 3, and binding a first section of well wall reinforcement cage; meanwhile, the first annular steel support 3 is assembled in an assembling field.
The locking collar beam 1 is arranged at a wellhead position, and at least two vertical sliding grooves 1a which are communicated up and down are reserved on the locking collar beam 1 along the circumferential direction. The annular steel support 3 is formed by connecting or welding a guide lug 3a and an arc block 3b through bolts, the whole annular steel support is annular, and the guide lug 3a corresponds to the vertical sliding groove 1a on the locking collar beam 1 one by one. The number of the vertical sliding chutes 1a is at least two, and preferably 3 or 4; accordingly, the number of the guide lugs 3a is also 3 or 4.
And secondly, the horizontal sliding rail 2 is in place, one end of the horizontal sliding rail 2 is connected to the assembly site, and the other end of the horizontal sliding rail is connected to the construction site. After the horizontal sliding rail 2 is in place, the assembled first annular steel support 3 is conveyed to the opening of the vertical shaft in a sliding mode along the horizontal sliding rail 2, the guide lugs 3a are aligned with the vertical sliding grooves 1a one by one, finally the horizontal sliding rail 2 is pulled out, the annular steel support 3 penetrates through the locking collar beam 1 and slides to the design position of the first annular steel support 3, the annular steel support 3 and the first section of well wall reinforcement cage are bound and fixed temporarily, and concrete pouring of the first section of well wall reinforcement cage is carried out. The first annular steel support 3 is fixed by temporary binding, and on one hand, the first annular steel support plays a role in supporting and reinforcing a well wall reinforcement cage during pouring; on the other hand, the steel support is convenient to fall to the design position of the next annular steel support 3 again so as to vacate the design position of the first annular steel support 3 for other annular steel supports 3 to occupy.
Thirdly, when the second annular steel support 3 is assembled, excavating earth to the design position of the second annular steel support 3, and binding a second section of well wall reinforcement cage; and then the annular steel support 3 in the shaft is moved downwards to the design position of the next annular steel support 3 and is temporarily bound and fixed. And (3) sliding and conveying the second annular steel support 3 assembled outside the well to the opening part of the vertical shaft through the horizontal sliding rail 2, and then falling to the designed position of the first annular steel support 3 for binding and fixing to complete the concrete pouring of the second section of well wall reinforcement cage. And analogizing until the concrete of the well wall reinforcement cage of all sections is poured, finally binding and fixing all the annular steel supports 3, and pouring all the annular steel supports 3. Before each annular steel support 3 is placed, the annular steel supports 3 which are placed are all moved downwards one position in sequence.
The cautions in the construction process are as follows: (1) after each annular steel support is put down in place, temporary binding and fixing are adopted, concrete of each section of well wall is poured without pouring the annular steel support, and finally secondary pouring is carried out after all the annular steel supports are bound and fixed; (2) when one annular steel support is placed, all the placed annular steel supports are sequentially moved downwards one position; (3) all the annular steel supports are consistent in size and specification.
The slip type annular steel support construction method is characterized in that on the basis of an original construction method, the assembling of annular steel supports is changed into the pre-assembling of an assembling site outside a vertical shaft, then the annular steel supports slide to the vertical shaft through a horizontal slide rail, and then the annular steel supports slide to a designed supporting position along the wall of the vertical shaft under the guiding action of a guide lug and a vertical slide groove to be fixed, so that the number of large-scale hoisting machinery of the annular steel supports is reduced, the safety risk is reduced, the quality and the size precision of annular steel support components can be guaranteed due to the pre-assembling, the time for influencing earth excavation due to the assembling of a construction site operation surface is shortened, the earth excavation and the assembling of the annular steel supports can be simultaneously carried out, and the construction period can be shortened.
Claims (5)
1. The utility model provides a sliding shaft annular steel supporting component, is including setting up fore shaft circle roof beam (1), wall of a well reinforcing bar and annular steel shotcrete (3) in the shaft, fore shaft circle roof beam (1) sets up in well head position department, and the wall of a well reinforcing bar ligature is in fore shaft circle roof beam (1) below, its characterized in that: a horizontal sliding rail (2) is arranged outside the vertical shaft, at least two vertical sliding grooves (1a) which are communicated up and down are reserved on the fore shaft ring beam (1) along the circumferential direction, and each annular steel support (3) is provided with guide lugs (3a) which are in one-to-one correspondence with the vertical sliding grooves (1a) on the fore shaft ring beam (1); annular steel shotcrete (3) can follow horizontal slide rail (2) and slide and send to the shaft mouth portion outside the shaft shaping back, after direction lug (3a) and vertical spout (1a) are aimed at one by one, takes out horizontal slide rail (2), and annular steel shotcrete (3) can pass fore shaft collar tie beam (1) landing to wall of a well reinforcing bar position department and carry out the ligature fixed.
2. The slip type vertical ring steel support assembly of claim 1, wherein: an assembling field is arranged outside the vertical shaft, and the annular steel support (3) is formed by connecting or welding a guide lug (3a) and an arc-shaped block (3b) on the assembling field through bolts.
3. The slip type vertical ring steel support assembly of claim 2, wherein: the number of the guide lugs (3a) and the number of the arc-shaped blocks (3b) are four respectively, and every two arc-shaped blocks (3b) are spliced through the guide lugs (3 a).
4. The slip type vertical ring steel support assembly of claim 1, wherein: the horizontal slide rail (2) comprises two slide rail bars which are arranged in parallel at intervals.
5. The construction method of the sliding type vertical shaft annular steel support component is characterized by comprising the following steps:
firstly, carrying out earthwork excavation on a construction site, binding steel bars of a locking collar beam and pouring concrete, completing construction of the locking collar beam (1), continuing to excavate the earthwork downwards after the construction of the locking collar beam (1) is completed, stopping the earthwork excavation after the earthwork is excavated to the design position of a first annular steel support (3), and binding a first section of well wall reinforcement cage; meanwhile, assembling the first annular steel support (3) in an assembling field;
the locking collar beam (1) is arranged at a wellhead position, and at least two vertical sliding grooves (1a) which are communicated up and down are reserved on the locking collar beam (1) along the circumferential direction; the annular steel support (3) is formed by connecting or welding a guide lug (3a) and an arc-shaped block (3b) through bolts, the whole annular steel support is annular, and the guide lugs (3a) correspond to the vertical sliding grooves (1a) on the fore shaft ring beam (1) one by one;
secondly, after the horizontal sliding rail (2) is in place, the assembled first annular steel support (3) is conveyed to the opening of a vertical shaft in a sliding mode along the horizontal sliding rail (2), then the guide lugs (3a) are aligned with the vertical sliding grooves (1a) one by one, finally the horizontal sliding rail (2) is pulled out, the annular steel support (3) penetrates through the locking collar beam (1) and slides to the design position of the first annular steel support (3), the annular steel support (3) and a first section of well wall reinforcement cage are temporarily bound and fixed, and concrete pouring of the first section of well wall reinforcement cage is carried out;
thirdly, when a second annular steel support (3) is assembled, excavating earth to the design position of the second annular steel support (3), binding a second section of well wall reinforcement cage, moving the annular steel support (3) in the vertical well downwards to the design position of the next annular steel support (3), temporarily binding and fixing, sliding the second annular steel support (3) assembled outside the well to the opening of the vertical well through a horizontal sliding rail (2), and then falling to the design position of the first annular steel support (3) for binding and fixing to finish the concrete pouring of the second section of well wall reinforcement cage; and analogizing until the concrete of the well wall reinforcement cage of all sections is poured, finally binding and fixing all the annular steel supports (3), and pouring all the annular steel supports (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911194827.XA CN110952985B (en) | 2019-11-28 | 2019-11-28 | Sliding type vertical shaft annular steel support assembly and construction method |
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| CN201911194827.XA CN110952985B (en) | 2019-11-28 | 2019-11-28 | Sliding type vertical shaft annular steel support assembly and construction method |
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| CN110952985A CN110952985A (en) | 2020-04-03 |
| CN110952985B true CN110952985B (en) | 2021-10-26 |
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| CN111794249B (en) * | 2020-07-20 | 2022-03-15 | 中国铁建重工集团股份有限公司 | Construction method of shaft locking structure and shaft locking structure |
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| CN110952985A (en) | 2020-04-03 |
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