CN207267975U - A kind of bed stabilization structure for being used under shield tunnel wear river - Google Patents

A kind of bed stabilization structure for being used under shield tunnel wear river Download PDF

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Publication number
CN207267975U
CN207267975U CN201720780373.4U CN201720780373U CN207267975U CN 207267975 U CN207267975 U CN 207267975U CN 201720780373 U CN201720780373 U CN 201720780373U CN 207267975 U CN207267975 U CN 207267975U
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China
Prior art keywords
shield tunnel
river
cofferdam
rotary jet
twice
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CN201720780373.4U
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Chinese (zh)
Inventor
刘永君
贾虎军
易敏
任富芝
白钰厚
韩逗
刘倩
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China Construction Sixth Engineering Division Co Ltd
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China Construction Sixth Engineering Division Co Ltd
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Priority to CN201720780373.4U priority Critical patent/CN207267975U/en
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Abstract

The utility model discloses a kind of bed stabilization structure for being used under shield tunnel wear river, including the rotary jet strengthening section being arranged on above shield tunnel, the armoured concrete slab being arranged in the rotary jet strengthening section and twice cutout cofferdam, cutout cofferdam is separately positioned on the both sides of the armoured concrete slab described in twice, and running through between the cofferdam that stops described in twice has more perpendicular overflow pipes excessively.The utility model is solved when wearing river under shield tunnel by reinforcing riverbed, and thickness of earth covering is relatively thin above shield tunnel, and geology is rich in underground water below river, and soil quality stabilizing is poor, the larger problem of construction risk such as gush, cave in shield-tunneling construction.And kept river upstream and downstream draining unobstructed by setting up overflow pipe in cofferdam, the construction risk that river construction is worn under shield tunnel is greatly reduced, has ensured the safety and quality of construction.

Description

A kind of bed stabilization structure for being used under shield tunnel wear river
Technical field
A kind of bed stabilization structure is the utility model is related to, particularly a kind of riverbed for being used under shield tunnel wear river adds Fixing structure.
Background technology
China's economy developed rapidly in recent years, and urban rail transit construction is unfolded in big and medium-sized cities in succession.Subway Tunnel Construction Frequently with shield construction, many shield running tunnels wear river under needing.Under when wearing river, thickness of earth covering above shield tunnel Relatively thin, geology is rich in underground water below river, and soil quality stabilizing is poor, and the construction risk such as gush, cave in shield-tunneling construction is larger. So the weight difficult point that river is the construction of shield section is worn under shield tunnel.It need to be taken when wearing river under shield tunnel of constructing Measure, reduces risk, ensures that construction smoothly safely carries out.
The content of the invention
The utility model provides one kind for wearing river under shield tunnel to solve technical problem present in known technology The bed stabilization structure of stream, the structure can ensure the safety and quality that river construction is worn under shield tunnel.
The utility model is adopted the technical scheme that to solve technical problem present in known technology:One kind is used for shield The bed stabilization structure in structure tunnel Xia Chuan rivers, including be arranged on rotary jet strengthening section above shield tunnel, be arranged on the rotation Armoured concrete slab and twice cutout cofferdam in section are reinforced in spray, and cutout cofferdam is separately positioned on the reinforced concrete described in twice The both sides of native plate, running through between the cofferdam that stops described in twice has more perpendicular overflow pipes excessively.
The width of the rotary jet strengthening section is shield tunnel top and each 2-4m in both sides, and depth is under the concrete slab Rise to shield tunnel over top 1m on surface.
Multiple high-pressure rotary jet grouting piles, a diameter of 800- of the high-pressure rotary jet grouting pile are equipped with the rotary jet strengthening section 1000mm, the spacing of adjacent two high-pressure rotary jet grouting piles is 600-700mm.
All same levels crossed overflow pipe and be distributed on middle part between the cofferdam that stops described in twice in parallel to each other Interior, a diameter of 800-1200mm for crossing overflow pipe, adjacent two spacing crossed between overflow pipe are 4-6m.
Built and formed using gunnysack dress clay code in the cutout cofferdam.
The cutout cofferdam is vertically arranged with river, and the both sides gradient in the cutout cofferdam is 1:2-3, top surface width are 1.5-2.5m。
The thickness of the armoured concrete slab is 40-60mm.
The utility model has the advantages and positive effects of:By reinforcing riverbed, solve and wear river under shield tunnel When, shield tunnel top thickness of earth covering is relatively thin, and geology is rich in underground water below river, and soil quality stabilizing is poor, in shield-tunneling construction The larger problem of construction risk such as gush, cave in.And river upstream and downstream draining was kept to lead to by setting up overflow pipe in cofferdam Freely, the construction risk that river construction is worn under shield tunnel is greatly reduced, has ensured the safety and quality of construction.
Brief description of the drawings
Fig. 1 is the plan of the utility model;
Fig. 2 is the elevation of the utility model.
In figure:1st, shield tunnel;2nd, river;3rd, stop cofferdam;4th, overflow pipe is crossed;5th, armoured concrete slab;6th, churning adds Gu section.
Embodiment
For that can further appreciate that the invention, features and effects of the utility model, the following examples are hereby given, and coordinates Attached drawing describes in detail as follows:
Please refer to Fig.1 and Fig. 2, it is a kind of to be used to wear the bed stabilization structure in river under shield tunnel, including it is arranged on shield The rotary jet strengthening section 6 of the top of tunnel 1, the armoured concrete slab 5 being arranged in the rotary jet strengthening section 6 and twice cutout cofferdam 3, Cutout cofferdam 3 is separately positioned on the both sides of the armoured concrete slab 5 described in twice, is passed through between the cofferdam 3 that stops described in twice It is installed with more perpendicular overflow pipes 4 excessively.
In the present embodiment, the width of the rotary jet strengthening section 6 is for the top of shield tunnel 1 and each 2-4m in both sides, depth To at 1 over top 1m of shield tunnel from 5 lower surface of concrete slab.It is equipped with the rotary jet strengthening section 6 multiple high Pressure rotary-spraying stake, a diameter of 800-1000mm of the high-pressure rotary jet grouting pile, the spacing of adjacent two high-pressure rotary jet grouting piles is 600- 700mm.All same levels crossed overflow pipe 4 and be distributed on middle part between the cofferdam 3 that stops described in twice in parallel to each other Interior, a diameter of 800-1200mm for crossing overflow pipe, adjacent two spacing crossed between overflow pipe 4 are 4-6m.It is described Built and formed using gunnysack dress clay code in cutout cofferdam 3.The cutout cofferdam 3 is vertically arranged with river 2, the cutout cofferdam The 3 both sides gradient is 1:2-3, top surface width are 1.5-2.5m.The thickness of the armoured concrete slab 5 is 40-60mm.
The construction method of the utility model:
One) in order to block current, first above shield tunnel rotary jet strengthening section 6 both sides construction cutout cofferdam 3, method For:First accumulated with gunnysack dress clay, then refill clay and tamp.
Two) overcurrent water pipe 4 is set up among cutout cofferdam 3, keeps river upstream and downstream draining unobstructed.
Three) after the completion of the construction in cofferdam 3 to be stopped, with water pump drain cutout cofferdam 3 in river water, cleaning bed-silt and Debris, carries out the backfill and compacting of clay in the range of rotary jet strengthening, the construction of armoured concrete slab 5 is then carried out, in coagulation Jet grouting pile construction hole is reserved on native plate 5.
Four) jet grouting pile driving machine is set up on concrete slab 5, carries out the construction of rotary churning pile, to form rotary jet strengthening section 6.
Although the preferred embodiment of the utility model is described above in conjunction with attached drawing, the utility model is not Above-mentioned embodiment is confined to, above-mentioned embodiment is only schematical, is not restricted, ability The those of ordinary skill in domain is not departing from the utility model aims and claimed under the enlightenment of the utility model In the case of scope, many forms can also be made, these are belonged within the scope of protection of the utility model.

Claims (7)

1. a kind of bed stabilization structure for being used under shield tunnel wear river, it is characterised in that including being arranged on shield tunnel Rotary jet strengthening section, the armoured concrete slab that is arranged in the rotary jet strengthening section and the twice cutout cofferdam of side, break described in twice Stream cofferdam is separately positioned on the both sides of the armoured concrete slab, and running through between the cofferdam that stops described in twice has more to hang down with it Straight crosses overflow pipe.
2. the bed stabilization structure according to claim 1 for being used under shield tunnel wear river, it is characterised in that the rotation The width that section is reinforced in spray is shield tunnel top and each 2-4m in both sides, and depth is to shield tunnel from the concrete slab lower surface At road over top 1m.
3. the bed stabilization structure according to claim 2 for being used under shield tunnel wear river, it is characterised in that described Rotary jet strengthening section is equipped with multiple high-pressure rotary jet grouting piles, a diameter of 800-1000mm of the high-pressure rotary jet grouting pile, described in adjacent two The spacing of high-pressure rotary jet grouting pile is 600-700mm.
4. the bed stabilization structure according to claim 1 for being used under shield tunnel wear river, it is characterised in that Suo Yousuo Stated overflow pipe be distributed in parallel to each other described in twice stop cofferdam between middle part same level in, it is described cross overflow pipe A diameter of 800-1200mm, it is adjacent two it is described cross overflow pipes between spacing be 4-6m.
5. the bed stabilization structure according to claim 1 for being used under shield tunnel wear river, it is characterised in that described disconnected Built and formed using gunnysack dress clay code in stream cofferdam.
6. the bed stabilization structure according to claim 5 for being used under shield tunnel wear river, it is characterised in that described disconnected Stream cofferdam is vertically arranged with river, and the both sides gradient in the cutout cofferdam is 1:2-3, top surface width are 1.5-2.5m.
7. the bed stabilization structure according to claim 1 for being used under shield tunnel wear river, it is characterised in that the steel The thickness of reinforced concrete plate is 40-60mm.
CN201720780373.4U 2017-06-30 2017-06-30 A kind of bed stabilization structure for being used under shield tunnel wear river Active CN207267975U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720780373.4U CN207267975U (en) 2017-06-30 2017-06-30 A kind of bed stabilization structure for being used under shield tunnel wear river

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Application Number Priority Date Filing Date Title
CN201720780373.4U CN207267975U (en) 2017-06-30 2017-06-30 A kind of bed stabilization structure for being used under shield tunnel wear river

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109026022A (en) * 2018-08-20 2018-12-18 中铁十二局集团有限公司 It is a kind of for floating the ruggedized construction and reinforcement means in pebble layer shield crossing river
CN109184699A (en) * 2018-08-20 2019-01-11 中铁六局集团有限公司 Existing river construction is worn under open trench tunnel
CN109653223A (en) * 2018-11-21 2019-04-19 中铁十二局集团有限公司 River anti-floating weighting board construction method
CN110374609A (en) * 2019-06-27 2019-10-25 中铁十六局集团地铁工程有限公司 A kind of ultra-shallow earth-covered shield lakebed builds island driving method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109026022A (en) * 2018-08-20 2018-12-18 中铁十二局集团有限公司 It is a kind of for floating the ruggedized construction and reinforcement means in pebble layer shield crossing river
CN109184699A (en) * 2018-08-20 2019-01-11 中铁六局集团有限公司 Existing river construction is worn under open trench tunnel
CN109184699B (en) * 2018-08-20 2020-07-10 中铁六局集团太原铁路建设有限公司 Construction method for passing existing river channel under open trench tunnel
CN109653223A (en) * 2018-11-21 2019-04-19 中铁十二局集团有限公司 River anti-floating weighting board construction method
CN110374609A (en) * 2019-06-27 2019-10-25 中铁十六局集团地铁工程有限公司 A kind of ultra-shallow earth-covered shield lakebed builds island driving method

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