CN203891042U - Cofferdam structure - Google Patents
Cofferdam structure Download PDFInfo
- Publication number
- CN203891042U CN203891042U CN201420290708.0U CN201420290708U CN203891042U CN 203891042 U CN203891042 U CN 203891042U CN 201420290708 U CN201420290708 U CN 201420290708U CN 203891042 U CN203891042 U CN 203891042U
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- Prior art keywords
- steel sheet
- sheet pile
- cofferdam
- cofferdam structure
- rows
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 100
- 239000010959 steel Substances 0.000 claims abstract description 100
- 239000002689 soil Substances 0.000 claims abstract description 25
- 239000003643 water by type Substances 0.000 claims description 21
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 238000010030 laminating Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 238000003466 welding Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000005641 tunneling Effects 0.000 description 4
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 101100366060 Caenorhabditis elegans snap-29 gene Proteins 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003415 peat Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The utility model relates to a cofferdam structure. The cofferdam structure comprises two rows of steel sheet piles, enclosing purlins, a geomembrane and a soil body structure, wherein the two rows of steel sheet piles are inserted into the soil layer at the bottom of a water area in parallel, an enclosing space is formed between the two rows of steel sheet piles, the enclosing purlins are symmetrically and transversely arranged on the opposite outer sides of the two rows of steel sheet piles and are fixed to the steel sheet piles through pull rods, the geomembrane is arranged in the enclosing space and adheres to the inner sides of the two rows of steel sheet piles and the soil layer at the bottom of the water area, the enclosing space is filled with the soil body structure, and the soil body structure is enclosed by the geomembrane. The steel sheet piles are clamped and fixed through the enclosing purlins and the pull rods, an inner support in the prior art is omitted, the work amount is reduced, the integral stability of the cofferdam structure is good and is not affected by the welding quality of the cofferdam and the inner support, the applicability is wide and the risk is low. The cofferdam structure has the advantages that the construction period is short, the construction cost is low, the construction quality is easy to ensure and the difficulty is low.
Description
Technical field
The utility model relates to constructing tunnel field, espespecially a kind of waters Steel Sheet Pile cofferdam structure.
Background technology
In shallow embedding formula soft soil tunnel engineering, because weak soil does not become pressure arch, can only adopt cut and cover tunneling.While adopting cut and cover tunneling, need to guarantee dry construction environment, existing way is to adopt cofferdam technology that cut and cover tunneling region is enclosed, and then the water in construction area is drained, then is carried out cut and cover tunneling.Current cofferdam method can be divided into two classes: the cast-in-place method construction in cofferdam and the construction of prefabricated Method for Installation, but in water, conventionally adopt the cast-in-place method construction in cofferdam, generally select earth rock cofferdam, reinforced concrete open caisson cofferdam, steel boxed cofferdam, steel sheet-pile cofferdam etc.Wherein, earth rock cofferdam is often subject to the depth of water, cofferdam scope and job site condition restriction, and the native stone amount that large engineering adopts earth rock cofferdam to need is excessive, the deficiency such as have that difficulty of construction is large, cost is high and long in time limit.Reinforced concrete open caisson cofferdam, steel boxed cofferdam have the deficiencies such as construction costs is high, long in time limit too.Conventional steel sheet pile cofferdam construction method, cofferdam resistance to overturning is poor, and applicability is subject to the restriction of the depth of water, and the difficult assurance of the Member Welding quality of cofferdam and inner support, during cofferdam construction, has a big risk.
Utility model content
The purpose of this utility model is to overcome the defect of prior art, and a kind of cofferdam structure is provided, problems such as solving poor stability in existing steel sheet pile cofferdam construction, be difficult for to guarantee with inner support welding quality, construction risk is large.
The technical scheme that realizes above-mentioned purpose is:
A kind of cofferdam structure of the utility model, comprising:
Two row's steel sheet piles, walk abreast and insert in the bottom solum of waters and form each other enclosed space;
Enclose purlin, symmetry crosses at the opposing outside of the described steel sheet pile of two rows and is fixed on described steel sheet pile by pull bar;
Geomembrane, is located in described enclosed space, and the laminating of the bottom solum in the inner side relative with the described steel sheet pile of two rows and described waters;
Soil structures, fills out and is overlying in described enclosed space and is enclosed by described geomembrane.
Purlin and the stake of pull bar sandwiched fixation steel plate are enclosed in employing, have saved inner support of the prior art, reduced engineering quantity, and the resistance to overturning of cofferdam structure are good, is not subject to the impact of cofferdam and inner support welding quality, and applicability is wide and risk is little.Steel sheet pile, enclose purlin and can recycle, do not waste steel, save construction cost.Geomembrane and soil structures, strengthen the anti-seepage effect that encloses purlin structure, effectively guarantees the dry construction of engineering in cofferdam.The advantage such as the utlity model has that short construction period, construction costs are low, construction quality is easy to guarantee and difficulty is low.
The further improvement of the utility model cofferdam structure is, described pull bar along described in enclose purlin direction interval and arrange.
The further improvement of the utility model cofferdam structure is, described pull bar is reinforcing bar.
The further improvement of the utility model cofferdam structure is, described steel sheet pile is through the cumulosol layer of bottom, described waters and imbed 1 to 2 meter of next soil layer.
The further improvement of the utility model cofferdam structure is, the length that described steel sheet pile exposes on the bottom solum of described waters is 1:1 to 1:2 with the Length Ratio of imbedding in the bottom solum of described waters.
Accompanying drawing explanation
Fig. 1 is the sectional drawing of the utility model cofferdam structure.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Consult Fig. 1, shown the sectional drawing of the utility model cofferdam structure.The utility model discloses a kind of cofferdam structure that adopts steel sheet pile in waters, by the cofferdam structure of both sides, water is separated, in cofferdam structure, carry out constructing tunnel, after completing, remove again cofferdam structure.Cofferdam structure of the present utility model is the steel sheet pile being oppositely arranged, purlin is enclosed in employing and pull bar is fixed, between steel sheet pile, be provided with geomembrane and soil structures, increase the stability of cofferdam integral body, reduce the risk that welding quality of the prior art is brought, there is short construction period, the advantage such as construction costs is low, good seepage-proof property.Below in conjunction with accompanying drawing, the utility model cofferdam structure is described.
Consult Fig. 1, shown the sectional drawing of the utility model cofferdam structure.Below in conjunction with Fig. 1, the utility model cofferdam structure is described.
As shown in Figure 1, the utility model cofferdam structure, for fields such as town road, bridge engineering and hydraulic engineerings, stops waters 8, effectively guarantees the dry construction of engineering in cofferdam.This cofferdam structure comprises two row's steel sheet piles, encloses purlin 3, pull bar 4, geomembrane 5 and soil structures 6, two row's steel sheet piles comprise outside steel sheet pile 1 and inner side steel sheet pile 2, outside and inner side are to set with respect to the construction area in cofferdam structure, outside steel sheet pile 1 and the parallel setting of inner side steel sheet pile 2, in soil layer bottom in the insertion waters, bottom of outside steel sheet pile 1 and inner side steel sheet pile 2, and between establish at regular intervalsly, outside steel sheet pile 1 and inner side steel sheet pile 2 sandwicheds are formed with enclosed space.Enclose the opposing outer surface that purlin 3 symmetries cross at outside steel sheet pile 1 and inner side steel sheet pile 2, and be positioned at the top of outside steel sheet pile 1 and inner side steel sheet pile 2, the outside of being located at the row of two in steel sheet pile steel sheet pile by enclosing purlin 3 gears, increases the stability connecting between each steel plate in steel sheet pile.Then by pull bar 4, run through and enclosed purlin 3 and outside steel sheet pile 1 and inner side steel sheet pile 2, will enclose purlin 3 and be fixed on outside steel sheet pile 1 and inner side steel sheet pile 2, the two ends of pull bar 4 are anchored on the outside of enclosing purlin 3.By pull bar 4, will enclose purlin 3 and steel sheet pile is fixedly clamped, increase the stability of cofferdam structure.Geomembrane 5 is layed in enclosed space, relative inner surface laminating with outside steel sheet pile 1 and inner side steel sheet pile 2, also with waters in bottom solum laminating, soil structures is located on geomembrane 5, by geomembrane 5, be coated, and be placed in enclosed space, for strengthening stability and the anti-seepage effect of cofferdam structure.
As the utility model one better embodiment, steel sheet pile adopts Larsen steel sheet pile, between Larsen steel sheet pile, is mutually connected, and for guaranteeing construction quality, first Larsen steel sheet pile just must inserted, and just can guarantee the correct position of the Larsen steel sheet pile of follow-up interlock.Outside steel sheet pile 1 and the spacing between inner side steel sheet pile 2 of the utility model cofferdam structure are 6 meters, when outside steel sheet pile 1 and inner side steel sheet pile 2 insert the bottom solum in waters, cumulosol layer 9 through bottom, waters, and stretch in next soil layer 10, the length stretching into be 1 meter to 2 meters dark, act as the stability that guarantees steel sheet pile structure.The part that steel sheet pile exposes waters bottom solum is 1:1 to 1 with the part ratio of imbedding waters bottom solum: 2.
As a better embodiment of the present utility model, enclose purlin 3 for channel-section steel, the preferred 25a of channel-section steel size, be located at apart from steel sheet pile top the position of 0.5 meter to 1 meter, article two, channel-section steel is located in the outside of two row's steel sheet piles, by pull bar 4, run through channel-section steel and steel sheet pile and be anchored on the outside of channel-section steel, channel-section steel and steel sheet pile are fixedly clamped.Preferably, pull bar 4 is reinforcing bar, adopting specification is the reinforcing bar of φ 20 to φ 28, along the direction interval of enclosing purlin 3, arrange, with the spacing of 1 meter to 1.5 meters, reinforcing bar is set, reinforcing bar runs through and encloses purlin 3 and steel sheet pile, reinforcing bar is fixed in the end of enclosing purlin 3 both sides, can adopt end reinforced bending is fitted in to the surface of enclosing purlin 3 to be fixed, also can be at end reinforced formation external screw thread, fastening by being with female sleeve or nut to screw togather.
As a better embodiment of the present utility model, when geomembrane 5 is arranged in the enclosed space of sandwiched between outside steel sheet pile 1 and inner side steel sheet pile 2, geomembrane 5 leaves certain surplus, for offsetting the deflection that sinks to producing because of peat soil layer compression after banketing.Soil structures 6 adopts local tonerde, this tonerde fills up the enclosed space of sandwiched between outside steel sheet pile 1 and inner side steel sheet pile 2, when the anti-seepage effect of steel sheet pile and geomembrane is bad, soil structures 6 can be used as San road impervious wall, has increased the anti-seepage effect of cofferdam structure.
The application process of the utility model cofferdam structure in constructing tunnel is: according to the geological conditions in constructing tunnel region and antiseepage requirement, determine the size of steel sheet pile and insertion and the parameter such as compare, in the position of setting, carry out the construction of cofferdam structure, as shown in Figure 1, cofferdam structure is located at the both sides of tunnel area 7, waters 8 is separated, make that tunnel area 7 is interior can carry out dry construction.The steel sheet pile of cofferdam structure is along the direction setting of tunnel area 7, by the water resistance in waters 8 every in the outside of steel sheet pile, after the cofferdam structure construction of tunnel area 7 both sides, water in the inner space that cofferdam structure is enclosed is drained, and then just can carry out dry construction to tunnel area 7.The insertion segmentation of the steel sheet pile of cofferdam structure is carried out, and every section is 6 meters long, and the steel sheet pile of outside and inner side carries out chi sequence construction, first construction outside steel sheet pile 1 construct again inside steel sheet pile 2.Then on steel sheet pile, be horizontally set with and enclose purlin 3, by pull bar 4, will enclose purlin and steel sheet pile is fixedly clamped, between steel sheet pile, lay geomembrane 5, then insert soil structures 6 on geomembrane 5, so just water resistance has been blocked, can construct to tunnel area 7.After the construction of tunnel area 7, i.e. the cofferdam structure of dismountable both sides, during dismounting, first remove more than 4 soil structures 6 of pull bar, then remove pull bar 4 and enclose purlin 3, then chi sequence dismounting inner side steel sheet pile 2 and outside steel sheet pile 1, finally remove remaining soil structures.
The beneficial effect of the utility model cofferdam structure is:
The steel sheet pile that purlin and pull bar sandwiched are fixedly set up in parallel is enclosed in employing, the good stability in cofferdam, and reduced engineering quantity, the risk of having avoided existing cofferdam and inner bracing member to exist because of welding quality.
Adopt geomembrane and soil structures to be filled in the space between two row's steel sheet piles, increased the bulk strength of steel sheet pile cofferdam structure, and soil structures can be used as impervious wall, improved the anti-seepage effect of cofferdam structure, the dry construction in the engineering region that effectively guarantees to enclose by cofferdam structure.
Steel sheet pile, pull bar and enclose that purlin is to be onstructed and complete after, all can recycling, make rational use of resources, do not waste steel, save construction cost.
The utility model also has that short construction period, construction costs are low, construction quality is easy to guarantee and the advantage such as difficulty of construction is low.
Below embodiment has been described in detail the utility model by reference to the accompanying drawings, and those skilled in the art can make many variations example to the utility model according to the above description.Thereby some details in embodiment should not form restriction of the present utility model, the utility model will be usingd scope that appended claims defines as protection domain of the present utility model.
Claims (5)
1. a cofferdam structure, is characterized in that, comprising:
Two row's steel sheet piles, walk abreast and insert in the bottom solum of waters and form each other enclosed space;
Enclose purlin, symmetry crosses at the opposing outside of the described steel sheet pile of two rows and is fixed on described steel sheet pile by pull bar;
Geomembrane, is located in described enclosed space, and the laminating of the bottom solum in the inner side relative with the described steel sheet pile of two rows and described waters;
Soil structures, fills out and is overlying in described enclosed space and is enclosed by described geomembrane.
2. cofferdam structure as claimed in claim 1, is characterized in that, described pull bar encloses the setting of purlin direction interval described in edge.
3. cofferdam structure as claimed in claim 2, is characterized in that, described pull bar is reinforcing bar.
4. the cofferdam structure as described in claims 1 to 3 any one, is characterized in that, described steel sheet pile passes the cumulosol layer of bottom, described waters and imbeds 1 meter to 2 meters of next soil layer.
5. cofferdam structure as claimed in claim 4, is characterized in that, the length that described steel sheet pile exposes on the bottom solum of described waters is 1:1 to 1:2 with the Length Ratio of imbedding in the bottom solum of described waters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420290708.0U CN203891042U (en) | 2014-06-03 | 2014-06-03 | Cofferdam structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420290708.0U CN203891042U (en) | 2014-06-03 | 2014-06-03 | Cofferdam structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203891042U true CN203891042U (en) | 2014-10-22 |
Family
ID=51717463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420290708.0U Expired - Lifetime CN203891042U (en) | 2014-06-03 | 2014-06-03 | Cofferdam structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203891042U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103981879A (en) * | 2014-06-03 | 2014-08-13 | 上海隧道工程股份有限公司 | Cofferdam structure and construction method thereof |
| CN109653226A (en) * | 2019-01-02 | 2019-04-19 | 中铁大桥局集团有限公司 | A kind of cofferdam structure based on the double steel sheet pile of core filling type |
-
2014
- 2014-06-03 CN CN201420290708.0U patent/CN203891042U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103981879A (en) * | 2014-06-03 | 2014-08-13 | 上海隧道工程股份有限公司 | Cofferdam structure and construction method thereof |
| CN109653226A (en) * | 2019-01-02 | 2019-04-19 | 中铁大桥局集团有限公司 | A kind of cofferdam structure based on the double steel sheet pile of core filling type |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151119 Address after: 200232 Shanghai city Xuhui District Wanping Road No. 1099 5 floor Patentee after: SHANGHAI TUNNEL ENGINEERING Co.,Ltd. Address before: 200082 No. 118, Dalian Road, Shanghai, Yangpu District Patentee before: SHANGHAI TUNNEL ENGINEERING Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20141022 |
|
| CX01 | Expiry of patent term |