CN205776282U - A kind of immersed tube tunnel rebuilds cofferdam structure - Google Patents

A kind of immersed tube tunnel rebuilds cofferdam structure Download PDF

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Publication number
CN205776282U
CN205776282U CN201620454341.0U CN201620454341U CN205776282U CN 205776282 U CN205776282 U CN 205776282U CN 201620454341 U CN201620454341 U CN 201620454341U CN 205776282 U CN205776282 U CN 205776282U
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CN
China
Prior art keywords
weir
jackstone
clay
cofferdam
rebuilds
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201620454341.0U
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Chinese (zh)
Inventor
文哲
邓彪
谢震灵
董小龙
郭小龙
万超
郭俊
杨国胜
万慕华
徐多
叶亮
张荣华
徐雪莹
吴孔勇
彭炎锋
邳仲强
崔海龙
南飞燕
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Railway Tunnel Group Erchu Co Ltd
Original Assignee
China Railway Tunnel Group Erchu Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by China Railway Tunnel Group Erchu Co Ltd filed Critical China Railway Tunnel Group Erchu Co Ltd
Priority to CN201620454341.0U priority Critical patent/CN205776282U/en
Application granted granted Critical
Publication of CN205776282U publication Critical patent/CN205776282U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

This utility model relates to a kind of immersed tube tunnel and rebuilds cofferdam structure, it is characterised in that: described substrate is a former cofferdam is filled sand long tube bag and riverbed by the residue after destroying by rush of water, jackstone weir body and jackstone weir, outside body inside substrate both sides jackstone block is formed;Between inner side jackstone weir body and jackstone weir, outside body, fill clay form first grade clay weir body, jackstone weir, inner side body, outside jackstone weir body and first grade clay weir body constitute earth rock cofferdam, above earth rock cofferdam, fill two grades of clay weir bodies, hole in the middle part of the body of first grade clay weir and pour plastic concrete hole-drilling interlocking pile.Reconstruction cofferdam structure speed of application of the present utility model is fast, and efficiency is high, and sound construction.

Description

A kind of immersed tube tunnel rebuilds cofferdam structure
Technical field
This utility model relates to the cofferdam structure of a kind of immersed tube tunnel engineering, belongs to water conservancy construction technical field.
Background technology
Using cofferdam structure to carry out waterproof, seepage control in immersed tube tunnel engineering engineering, external side, weir is that clay core is oblique Wall, inner side is for filling sand long tube bag.Saying that skirt weir often suffers act of god flood peak, flood covers rapidly weir crest, Moment forms big drop torrent and directly descends cascading waterfalls, side slope in wide scouring cofferdam, and punching is damaged mould bag, washed away Interior weir sand body and middle core bulk cargo, cause weir, termination body integral thinned, cofferdam three axes agitating pile and plasticity mixed Solidifying soil cut-pff wall is destroyed, and the most outer weir body cannot resist high hydraulic pressure, and outer weir body mould bag is also by flood many places Drawing crack, and then outer weir body mould bag sand washed away by flood, along with inside and outside weir body is rushed to open breach rapidly in succession Expanding, final flood destroys by rush of water weir body.
In the repair process of cofferdam, river, the general immersed tube tunnel using axis dry-docking method to construct is at section floating Need to apply secondary cofferdam after undocking to be kept apart with river by dry-docking, then the water in dry-docking drained and carry out Secondary excavation.When rebuilding cofferdam, being affected relatively big by hydrologic condition, construction environment is complicated, and difficulty of construction is big.
Summary of the invention
For rebuilding cofferdam in river, being affected relatively big by River Hydrology condition, construction environment is complicated, difficulty of construction High problem, this utility model provides a kind of immersed tube tunnel and rebuilds cofferdam structure, and its work progress simply may be used Control, contributes to quickly rebuilding cofferdam and ensureing its ruggedness.
This utility model is realized by following technical proposals.A kind of immersed tube tunnel rebuilds cofferdam structure, including Substrate, jackstone weir, inner side body, jackstone weir, outside body, first grade clay weir body, two grades of clay weir bodies, its feature It is: described substrate is a former cofferdam is filled sand long tube bag and riverbed, in substrate both sides by the residue after destroying by rush of water Jackstone weir body and jackstone weir, outside body inside the formation of jackstone block;Inner side jackstone weir body and jackstone weir, outside body it Between fill clay and form first grade clay weir body, jackstone weir, inner side body, outside jackstone weir body and first grade clay weir body Constitute earth rock cofferdam, above earth rock cofferdam, fill two grades of clay weir bodies;Hole in the middle part of the body of first grade clay weir And pour plastic concrete hole-drilling interlocking pile.
Further preferably, weir body is destroyed by rush of water along the most concave gap of axis, plastic concrete hole-drilling interlocking pile Job area stratum is mainly the long tube bag back-up sand and clay do not destroyed by rush of water, and wherein gap both sides layer of sand is relatively Thickness, middle layer of sand is relatively thin, in order to ensure to rebuild the intensity of cofferdam weakness, at plastic concrete hole-drilling interlocking Stake corner and triple pipe spiral spraying pile is set with original plastic concrete cut-off wall joint part.
Further preferably, described reinforcing bar is laid in first grade clay weir body and the side slope of two grades of clay weir bodies and end face Mesh sheet mould build early strength concrete;At the bottom of Slope top, slope and knick point position reinforced mesh must set continuously Put.Side slope and Po Ding squeeze into the mesh sheet reinforcing bar of fixing reinforcing bar, and reinforcing bar is firm with reinforced mesh colligation.
Further preferably, pre-buried pvc pipe conduct before the side slope surface of first grade clay weir body and two grades of clay weir bodies Spilled water hole.
Further preferably, plastic concrete hole-drilling interlocking pile is divided into a sequence stake and two sequence stakes, a sequence stake and two sequences Stake form an overall piling structure continuously, closed in embedding interlocking pattern.
The beneficial effects of the utility model: this reconstruction cofferdam structure speed of application is fast, efficiency is high, and structure Firmly, earth rock cofferdam rebuild weir body and seepage prevention system thereof and have that Stability Analysis of Structures, anti-permeability performance be good, cost relatively Low, operation facilitates, safety is high, the duration is controlled and economic dispatch advantage, can be after being destroyed by rush of water in a former cofferdam Residue fill sand long tube bag and riverbed on the basis of quickly rebuild cofferdam, carry for similar cofferdam construction of rebuilding from now on It is worth for reference.
Accompanying drawing explanation
Fig. 1 is to rebuild cofferdam drawing in side sectional elevation.
Fig. 2 is to rebuild cofferdam transverse plane figure.
In figure: 1. substrate, 2. outside jackstone weir body, 3. inside jackstone weir body, 4. first grade clay weir body, 5. Two grades of clay weir bodies, 6. riverbed, 7. steel-pipe pile, the most secretly section of burying and immersed segment boundary, 9. plastic concrete brill Hole interlocking pile.
Detailed description of the invention
As depicted in figs. 1 and 2, a kind of immersed tube tunnel rebuilds cofferdam structure, after being destroyed by rush of water with a former cofferdam Residue fill sand long tube bag and riverbed (6) are substrate (1), inside substrate (1) both sides jackstone block is formed Jackstone weir body (2) and jackstone weir, outside body (3);Inside and outside over-water construction side throwing stone weir body according to first inner side, Posterolateral sequence construction, utilizes boats and ships that stone is transported to middle-end head circumference weir, river, utilizes 8m3Grab is stone Block carries out throwing under water according to cofferdam axis and closes up weir body.During the body construction of jackstone weir, periodically weir body is entered Row sweeps survey, it is ensured that weir shape and Slope ratio meet design requirement.Jackstone weir, medial and lateral body construction is extremely After 15.0m elevation, dump truck land transportation clay, to job site, utilizes excavator, loader and loader Between side throwing stone weir body (2), jackstone weir, outside body (3), landfill clay glues to cofferdam end face formation one-level inside Earth bank body (4), jackstone weir, inner side body (2), jackstone weir, outside body (3) and first grade clay weir body (4) Constitute earth rock cofferdam.
Earth rock cofferdam height about 17m, weir crest width is 46.1m, and weir bottom width degree is 71.1m, weir body upstream face Jackstone side slope is than for 1:1.5, and back side jackstone Slope is than for 1:1.2.Body (2) top, jackstone weir, outside Absolute altitude 15.0m, top width is 8m, and bottom width is 33.2m, the side Slope ratio that meets water for 1:1.5, the back of the body Water side Slope is than for 1:1.2.Jackstone weir, inner side body (3) elevation of top 12.0m, top width is 8m, Bottom width is 31.9m, and Slope ratio in both sides is 1:1.2, and land side side slope sets 3.0m at 8.0m elevation Wide platform.Using the weir bodily form formula that clay weir body and jackstone weir body combine, jackstone and clay are specifically Under the conditions of hydrological environment from steady side slope, on the premise of meeting weir body stably safety, reduce weir body as far as possible and break Face size, the quantities that weir body is performed and removed is preferably minimized, and ensure that in the body of later stage clay weir Plastic concrete hole-drilling interlocking pile normal construction, it is ensured that the anti-seepage effect of weir body.
Two grades of clay weirs body (5) high for construction 3m above earth rock cofferdam, two grades of clay weirs body (5) bottoms Width is 15.5m, and top width is 5.0m, and medial and lateral side slope is 1:1.75.First grade clay weir body (4) and two grades of clay weirs body (5) constitute clay core sloping core, and clay core sloping core amounts to 285m, flat Face is divided into three sections and constructs.Clay weir body construction Automobile Transportation clay to job site, backfills layered Backfill is built, every layer thickness 300mm, utilizes 20t road roller layered rolling, and compactness reaches 0.9.Two grades are glued Earth bank body (5) uses the machines such as mechanized construction, configuration excavator, loader, dump truck vibrated roller Tool equipment and detecting instrument, formed and dig dress, transport, shakeout, roll, detect line production.
First grade clay weir body (4) and the side slope of two grades of clay weirs body (5) and end face use φ 8@150 × 150mm reinforced mesh+100mm thickness C20 early strong form concrete, reinforced mesh a size of 2000 × 2000mm, lap of splice 300mm, at the bottom of Slope top, slope and knick point position reinforced mesh must set continuously Put.Side slope and Po Ding squeeze into φ 22 (L=1m) reinforcing bar and fix reinforced mesh, and setting space 2000 × 2000mm, reinforcing bar is firm with reinforced mesh colligation.Before side slope surface concrete construction, pre-buried φ 100PVC makees For spilled water hole, spilled water hole spacing 2500 × 2500mm, a length of 0.5m of pvc pipe, double-deck 80 mesh of outsourcing are close Mesh net.
In the boring of middle part, first grade clay weir body (4), pour plastic concrete hole-drilling interlocking pile (9), plasticity Concrete drill hole interlocking pile (9) diameter 1200mm, pile spacing 900mm, be engaged 300mm, enter rock 3.5m. Destroyed by rush of water weir body along the concave gap of axis, the length predominantly do not destroyed by rush of water in hole-drilling interlocking pile job area stratum Geo-tube filling sand and clay, wherein gap both sides layer of sand is thicker, and middle layer of sand is relatively thin.Glue in the middle part of earth rock cofferdam Soil cannot tamp during filling, the most closely knit time is long, utilize rotary drilling rig cannot pore-forming, it is right to use The less clean-out machine of surrounding formations disturbance is constructed, and clean-out machine job scheduling is slow.Use four Clean-out machine is holed, and makes mud off by oneself, jumps hole construction, underwater casting plastic concrete, plasticity coagulation Soil intensity index is with former material for diaphragm wall of Cofferdam plastic concrete.Plastic concrete hole-drilling interlocking pile (9) is divided into a sequence Stake and two sequence stakes, the concrete of a sequence stake and two sequence stakes merges and forms one in embedding interlocking pattern Continuously, the overall piling structure closed.
Construct at plastic concrete hole-drilling interlocking pile (9) corner with original plastic concrete cut-off wall joint partTriple pipe spiral spraying pile, utilizes tri-tube method drilling machine construction, often 6 rotary churning piles of place's construction, phase Adjacent stake overlap joint is no less than 300mm, air slaking argillaceous siltstoue 3.5m in entering at the bottom of stake.Rotary churning pile uses intensity Grade is not less than the Portland cement of 42.5, and cement mixed ratio is not less than 25%, the water ash of cement grout Ratio is 1.0~1.5, unconfined compressive strength (28d) >=0.8MPa, infiltration coefficient≤1.0x10-7cm/s, Churning pressure preferably controls 15~20MPa.

Claims (5)

1. immersed tube tunnel rebuilds a cofferdam structure, including substrate, jackstone weir, inner side body, jackstone weir, outside body, one Level clay weir body, two grades of clay weir bodies, it is characterised in that: described substrate is after being destroyed by rush of water in a former cofferdam Residue fills sand long tube bag and riverbed, jackstone weir body and jackstone weir, outside inside substrate both sides jackstone block is formed Body;Between inner side jackstone weir body and jackstone weir, outside body, fill clay form first grade clay weir body, interior side throwing Stone weir body, outside jackstone weir body and first grade clay weir body constitute earth rock cofferdam, fill above earth rock cofferdam Two grades of clay weir bodies;Hole in the middle part of the body of first grade clay weir and pour plastic concrete hole-drilling interlocking pile.
2. immersed tube tunnel as claimed in claim 1 rebuilds cofferdam structure, it is characterised in that: at first grade clay weir body Lay reinforced mesh with the side slope of two grades of clay weir bodies and end face and mould builds early strength concrete;Slope top, slope The end and knick point position reinforced mesh are arranged continuously;Side slope and Po Ding squeeze into the mesh sheet reinforcing bar of fixing reinforcing bar, steel Muscle is firm with reinforced mesh colligation.
3. immersed tube tunnel as claimed in claim 1 rebuilds cofferdam structure, it is characterised in that: bore at plastic concrete Hole interlocking pile corner and with original plastic concrete cut-off wall joint part construct triple pipe spiral spraying pile.
4. immersed tube tunnel as claimed in claim 2 rebuilds cofferdam structure, it is characterised in that: first grade clay weir body and Two grades of clay weir pre-buried pvc pipes of body are as spilled water hole.
5. immersed tube tunnel as claimed in claim 1 rebuilds cofferdam structure, it is characterised in that: plastic concrete is holed Interlocking pile be divided into a sequence stake and two sequence stakes, a sequence stake and two sequence stakes in embed interlocking pattern and form a company Overall piling structure continuous, that close.
CN201620454341.0U 2016-05-18 2016-05-18 A kind of immersed tube tunnel rebuilds cofferdam structure Expired - Fee Related CN205776282U (en)

Priority Applications (1)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620454341.0U CN205776282U (en) 2016-05-18 2016-05-18 A kind of immersed tube tunnel rebuilds cofferdam structure

Publications (1)

Publication Number Publication Date
CN205776282U true CN205776282U (en) 2016-12-07

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106836246A (en) * 2016-12-20 2017-06-13 杭州江润科技有限公司 Open trench tunnel crosses the construction method of section building enclosure
CN113136883A (en) * 2021-05-25 2021-07-20 中交第四航务工程局有限公司 Open sea cofferdam and construction method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106836246A (en) * 2016-12-20 2017-06-13 杭州江润科技有限公司 Open trench tunnel crosses the construction method of section building enclosure
CN106836246B (en) * 2016-12-20 2018-10-23 杭州江润科技有限公司 Open trench tunnel crosses the construction method of section building enclosure
CN113136883A (en) * 2021-05-25 2021-07-20 中交第四航务工程局有限公司 Open sea cofferdam and construction method thereof

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20161207

Termination date: 20210518

CF01 Termination of patent right due to non-payment of annual fee