CN207891895U - Walkway shaft excavation supporting construction - Google Patents

Walkway shaft excavation supporting construction Download PDF

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Publication number
CN207891895U
CN207891895U CN201721814719.4U CN201721814719U CN207891895U CN 207891895 U CN207891895 U CN 207891895U CN 201721814719 U CN201721814719 U CN 201721814719U CN 207891895 U CN207891895 U CN 207891895U
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CN
China
Prior art keywords
supporting construction
walkway
bracing members
shaft
bar
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Application number
CN201721814719.4U
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Chinese (zh)
Inventor
王俊丰
黄祥国
陈镇
易志涛
王道文
谢征兵
樊周彭
卢吉
苗强
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Wuhan Municipal Construction Group Co Ltd
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Wuhan Municipal Construction Group Co Ltd
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Priority to CN201721814719.4U priority Critical patent/CN207891895U/en
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Abstract

The utility model is related to a kind of walkway shaft excavation supporting construction, it includes well week soil shear failure stake ruggedized construction, fore shaft collar tie beam, side wall supporting construction;The side wall supporting construction includes several cyclic annular bracing members, advanced tubule, bar-mat reinforcement grid, gunite concrete and Grouting Pipe;Several ring-type bracing members are evenly arranged from top to bottom along the borehole wall, and multiple advanced tubules are evenly arranged in advance on the outside of the ring-type bracing members;Bar-mat reinforcement grid outside rebuilding along hoistway wall, the gunite concrete package covering cyclic annular bracing members and the bar-mat reinforcement grid;Grouting Pipe is laid on the outside of hoistway wall after the completion of gunite concrete;The well week soil shear failure stake ruggedized construction includes the regions well week 2m and shaft bottom or less the regions 3m;The fore shaft collar tie beam is located at the surface well head of side wall supporting construction, and retaining wall is arranged above the fore shaft collar tie beam.For the utility model especially suitable for soft soil area, overall stiffness is big, stability is good, is easy to constructing operation.

Description

Walkway shaft excavation supporting construction
Technical field
The utility model belongs to technical field of municipal construction, and in particular to a kind of walkway shaft excavation supporting construction.
Background technology
City soft soil area, carry out underground pedestrian passageway digging process in be often faced with working space is narrow, the duration is nervous, The problems such as architectural environment complexity, underground utilities entanglement are difficult to meet the requirements using conventional building enclosure.
Conventional channel shaft support carries out consolidation process using spray anchor method to the side wall soil body, and sprays anchor method presence The problem of " the strong weak bottom of wall ", hole bottom use grouting and reinforcing, slip casting effect to be often difficult to ensure, and building enclosure fails embedded hole bottom The following soil body causes the sedimentation of vertical shaft surrounding soil excessive, and there are the danger of side wall slump.
Utility model content
In view of the above technical problems, whole the purpose of this utility model is to provide a kind of especially suitable for soft soil area Body rigidity is big, stability is good, is easy to the walkway shaft excavation supporting construction of constructing operation.
To achieve the above object, technical solution adopted in the utility model is:
A kind of walkway shaft excavation supporting construction, it is characterised in that:It include well week soil shear failure stake ruggedized construction, Fore shaft collar tie beam, side wall supporting construction;The side wall supporting construction includes several cyclic annular bracing members, advanced tubule, steel grid Grid, gunite concrete and Grouting Pipe;Several ring-type bracing members are evenly arranged from top to bottom along the borehole wall, outside the ring-type bracing members Side is evenly arranged multiple advanced tubules in advance;Bar-mat reinforcement grid outside rebuilding along hoistway wall, the injection are mixed The solidifying soil package covering cyclic annular bracing members and the bar-mat reinforcement grid;Note is laid after the completion of gunite concrete on the outside of hoistway wall Slurry pipe;The well week soil shear failure stake ruggedized construction includes the regions well week 2m and shaft bottom or less the regions 3m;Fore shaft collar tie beam position At the surface well head of side wall supporting construction, retaining wall is set above the fore shaft collar tie beam.
The ring-type bracing members are closed cyclization using I20a I-steel, and the spacing of adjacent annular bracing members is 0.85m.
The advanced tubule uses Ф 42mm*3.5mm, L=2.0m seamless steel pipes, multiple advanced tubule circumferential direction spacing For 0.5m, 10 °~35 ° of outer limb.
The slip casting length of tube is 0.8m, circumferential spacing 1.5m, is in quincuncial arrangement.
The steel grid grid size of mesh opening is 150mm*150mm.
Gunite concrete thickness 300mm, intensity C20 on the bar-mat reinforcement grid.
The regions 3m cement mixing content below the shaft bottom are 20%, and the regions well week 2m cement mixing content is 8%.
The fore shaft circle depth of beam is adjustable, by adjusting absolute altitude and retaining wall height and the shallow underground pipe of fore shaft collar tie beam Line is staggered.
The beneficial effects of the utility model are:For the utility model especially suitable for soft soil area, overall stiffness is big, stablizes Property is good, is easy to constructing operation.The utility model takes full advantage of the mechanical property of steel and concrete, by vertical shaft shaft bottom and side wall It connects integral, significantly improves vertical shaft overall stiffness and stability.The utility model requires low, Neng Goushi to construction environment Narrow construction environment is answered, while construction equipment used is small, goes slick.The utility model operability is preferable, can Shallow underground pipeline is rationally avoided by adjusting the absolute altitude of fore shaft collar tie beam.Using the utility model structure, construction speed is fast, and normal Rule supporting construction is compared, and the excavation that can get around open excavation section foundation pit is directly entered the construction of tunneling section, provides safeguard for the duration.
Description of the drawings
Fig. 1 is the vertical cross-section schematic diagram of walkway shaft excavation supporting construction.
Description of the drawings:1- fore shaft collar tie beams;2- retaining walls;3- ring-type bracing members;4- advanced tubules;5- Grouting Pipes;6- wells All regions 2m;The regions 3m below the shaft bottoms 7-.
Specific implementation mode
The utility model in order to better understand does the technical solution of the utility model with reference to embodiment and attached drawing Further instruction(As shown in Figure 1).
A kind of walkway shaft excavation supporting construction, it include well week soil shear failure stake ruggedized construction, fore shaft collar tie beam 1, Side wall supporting construction;The side wall supporting construction includes several cyclic annular bracing members 3(It is described ring-type bracing members 3 be and vertical shaft circumference The ring structure to match), advanced tubule 4, bar-mat reinforcement grid, gunite concrete and Grouting Pipe 5;3 edge of several ring-type bracing members The borehole wall to be evenly arranged from top to bottom, it is described(Each)3 outside of cyclic annular bracing members is evenly arranged multiple advanced tubules 4 in advance; Bar-mat reinforcement grid outside rebuilding along hoistway wall, the gunite concrete package covering cyclic annular bracing members 3 and The bar-mat reinforcement grid;After the completion of gunite concrete on the outside of hoistway wall(Uniformly)It lays(It is multiple)Grouting Pipe 5;The well week soil Body cement mixing method structure includes the regions well week 2m 6(Expire hall using 850@, 600 mixing piles to reinforce)With 3m regions below shaft bottom 7; The fore shaft collar tie beam 1 is located at the surface well head of side wall supporting construction, and retaining wall 2 is arranged in 1 top of the fore shaft collar tie beam.
One of which scheme is:From top to bottom multiple advanced tubules are uniformly provided with per singular 3 outside of layer ring-type bracing members 4, multiple Grouting Pipes 5 are all uniformly provided on the cyclic annular bracing members 3 that lower layer of every layer of advanced tubule 4.
The ring-type bracing members 3 are closed cyclization using I20a I-steel, and the spacing of adjacent annular bracing members 3 is 0.85m(Together When setting stull and angle brace, angle brace uses 159 steel pipe supports of Φ using I20a I-steel and I-steel firm welding, stull, with I-steel upper junction plate is connected by screw bolts).
The advanced tubule 4 is using Ф 42mm*3.5mm, L=2.0m(That is diameter 42mm, thickness 3.5mm, long 2.0m)It is seamless Steel pipe, the circumferential spacing of multiple advanced tubules 4 is 0.5m, 10 °~35 ° of outer limb.
5 length of the Grouting Pipe is 0.8m, circumferential spacing 1.5m, is in quincuncial arrangement.
The steel grid grid size of mesh opening is 150mm*150mm.
Gunite concrete thickness 300mm, intensity C20 on the bar-mat reinforcement grid(Ensure that bar-mat reinforcement grid is completely covered).
7 cement mixing content of the regions 3m below the shaft bottom are 20%, the regions well week 2m 6(That is the above soil body in shaft bottom)Cement mixing content It is 8%.
The height of the fore shaft collar tie beam 1 is adjustable, by adjusting fore shaft collar tie beam 1 absolute altitude and 2 height of retaining wall with shallow-layer Underground pipelines are staggered.
Slip casting is carried out to advanced tubule 4 first;Again after 4 concrete strength of advanced tubule reaches 70% by Grouting Pipe 5 into Row back-grouting, back-grouting use cement mortar.
It is described above be only the utility model Application Example, certainly cannot with this come limit the utility model it Interest field, therefore equivalence changes made according to the patent scope of the utility model, still belong to the scope of protection of the utility model.

Claims (8)

1. a kind of walkway shaft excavation supporting construction, it is characterised in that:It includes well week soil shear failure stake ruggedized construction, lock Mouth circle beam(1), side wall supporting construction;The side wall supporting construction includes several cyclic annular bracing members(3), advanced tubule(4), steel Reinforced net grid, gunite concrete and Grouting Pipe(5);Several ring-type bracing members(3)It is evenly arranged from top to bottom along the borehole wall, it is described Cyclic annular bracing members(3)Outside is evenly arranged multiple advanced tubules in advance(4);Bar-mat reinforcement grid outside along hoistway wall is double Layer arrangement, the gunite concrete package covering cyclic annular bracing members(3)And the bar-mat reinforcement grid;Gunite concrete is completed Grouting Pipe is laid on the outside of hoistway wall afterwards(5);The well week soil shear failure stake ruggedized construction includes the regions well week 2m(6)The shaft bottom and The following regions 3m(7);The fore shaft collar tie beam(1)At the surface well head of side wall supporting construction, the fore shaft collar tie beam(1)On Side's setting retaining wall(2).
2. shaft excavation supporting construction in walkway according to claim 1, it is characterised in that:The ring-type bracing members (3)Cyclization, adjacent annular bracing members are closed using I20a I-steel(3)Spacing be 0.85m.
3. shaft excavation supporting construction in walkway according to claim 2, it is characterised in that:The advanced tubule (4)Using Ф 42mm*3.5mm, L=2.0m seamless steel pipes, multiple advanced tubules(4)Circumferential spacing is 0.5m, 10 ° of outer limb ~35 °.
4. shaft excavation supporting construction in walkway according to claim 3, it is characterised in that:The Grouting Pipe(5)It is long Degree is 0.8m, circumferential spacing 1.5m, is in quincuncial arrangement.
5. the walkway shaft excavation supporting construction according to claim 2,3 or 4, it is characterised in that:The bar-mat reinforcement Grid size of mesh opening is 150mm*150mm.
6. shaft excavation supporting construction in walkway according to claim 5, it is characterised in that:On the bar-mat reinforcement grid Gunite concrete thickness 300mm, intensity C20.
7. shaft excavation supporting construction in walkway according to claim 1, it is characterised in that:The areas 3m below the shaft bottom Domain(7)Cement mixing content is 20%, the regions well week 2m(6)Cement mixing content is 8%.
8. shaft excavation supporting construction in walkway according to claim 1, it is characterised in that:The fore shaft collar tie beam(1) Height it is adjustable, by adjusting fore shaft collar tie beam(1)Absolute altitude and retaining wall(2)Height is staggered with shallow underground pipeline.
CN201721814719.4U 2017-12-22 2017-12-22 Walkway shaft excavation supporting construction Active CN207891895U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201721814719.4U CN207891895U (en) 2017-12-22 2017-12-22 Walkway shaft excavation supporting construction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201721814719.4U CN207891895U (en) 2017-12-22 2017-12-22 Walkway shaft excavation supporting construction

Publications (1)

Publication Number Publication Date
CN207891895U true CN207891895U (en) 2018-09-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201721814719.4U Active CN207891895U (en) 2017-12-22 2017-12-22 Walkway shaft excavation supporting construction

Country Status (1)

Country Link
CN (1) CN207891895U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110905523A (en) * 2019-12-04 2020-03-24 成都轨道建设管理有限公司 Subway vertical shaft construction method
CN110952985A (en) * 2019-11-28 2020-04-03 苏州中车建设工程有限公司 Sliding type vertical shaft annular steel support assembly and construction method
CN110985000A (en) * 2019-11-28 2020-04-10 苏州中车建设工程有限公司 Vertical shaft annular steel support assembly and construction method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110952985A (en) * 2019-11-28 2020-04-03 苏州中车建设工程有限公司 Sliding type vertical shaft annular steel support assembly and construction method
CN110985000A (en) * 2019-11-28 2020-04-10 苏州中车建设工程有限公司 Vertical shaft annular steel support assembly and construction method
CN110985000B (en) * 2019-11-28 2021-06-15 苏州中车建设工程有限公司 Vertical shaft annular steel support assembly and construction method
CN110952985B (en) * 2019-11-28 2021-10-26 苏州中车建设工程有限公司 Sliding type vertical shaft annular steel support assembly and construction method
CN110905523A (en) * 2019-12-04 2020-03-24 成都轨道建设管理有限公司 Subway vertical shaft construction method

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