CN205776282U - A kind of immersed tube tunnel rebuilds cofferdam structure - Google Patents
A kind of immersed tube tunnel rebuilds cofferdam structure Download PDFInfo
- 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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- weir
- jackstone
- clay
- cofferdam
- rebuilds
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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
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.
Priority Applications (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 |
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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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620454341.0U Expired - Fee Related CN205776282U (en) | 2016-05-18 | 2016-05-18 | A kind of immersed tube tunnel rebuilds cofferdam structure |
Country Status (1)
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Cited By (3)
| 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 |
| CN108277815A (en) * | 2018-03-19 | 2018-07-13 | 中国五冶集团有限公司 | The cofferdam structure and its construction method constructed for water intaking header structure in river |
| 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 |
-
2016
- 2016-05-18 CN CN201620454341.0U patent/CN205776282U/en not_active Expired - Fee Related
Cited By (5)
| 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 |
| CN108277815A (en) * | 2018-03-19 | 2018-07-13 | 中国五冶集团有限公司 | The cofferdam structure and its construction method constructed for water intaking header structure in river |
| CN108277815B (en) * | 2018-03-19 | 2023-03-14 | 中国五冶集团有限公司 | Cofferdam structure for construction of water taking head structure in river and construction method thereof |
| 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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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |
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| CF01 | Termination of patent right due to non-payment of annual fee |