CN101514554A - Flexible structure cofferdam - Google Patents
Flexible structure cofferdam Download PDFInfo
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- CN101514554A CN101514554A CNA2009100428812A CN200910042881A CN101514554A CN 101514554 A CN101514554 A CN 101514554A CN A2009100428812 A CNA2009100428812 A CN A2009100428812A CN 200910042881 A CN200910042881 A CN 200910042881A CN 101514554 A CN101514554 A CN 101514554A
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- cofferdam
- reinforced
- flexible structure
- gabion
- reinforced gabion
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Abstract
The invention discloses a flexible structure cofferdam consisting of steel bar gabions on both sides outside, rockfill in the middle as well as tie bars, steel wire mesh reinforced strip which have a certain tensile strength, are embedded in rolled compact fill and are connected with the steel bar gabions. The flexible structure cofferdam is characterized by characters of an earth-rock cofferdam of being capable of making by pouring local materials, being well suitable to foundation, reducing treatment load of deep overburden layers, saving investment and shortening construction period; small sectional area of a concrete cofferdam, acceptable slope ratio of both sides up to 1:0.5, and up to 8m/s anti-scour flow rate as a longitudinal cofferdam.
Description
Technical field
The present invention relates to a kind of cofferdam, particularly a kind of flexible structure cofferdam that is applicable to the water conservancy and hydropower industry, it can be built on the basis of various geological conditions, particularly on the deep covering layer basis, uses as longitudinal cofferdam.Also can be applied on other civil engineering and use as a retaining structure.
Background technology
Water conservancy and hydropower industry, cofferdam have cofferdams such as earth rock cofferdam, concrete cofferdam, stone masonry cofferdam, steel sheet pile cellular cofferdam, crib cofferdam, bamboo cage cofferdam, turf cofferdam.
Earth rock cofferdam is to fill the cofferdam that forms with local material, not only can gather materials on the spot and make full use of excavation and abandon material as the cofferdam filler, and also simple structure, easy construction is easy to remove, and construction costs is lower, and this cofferdam is widely adopted.Because of the earth rock cofferdam section is bigger, generally be used for transverse cofferdam.But in the stage diversion in broad riverbed,, also can be used as longitudinal cofferdam, but note the erosion control design, to protect cofferdam safety because the flow velocity of the narrow river bed increase in cofferdam is little.
Concrete cofferdam has that impact resistance is big, cross dimensions is little, engineering quantity is few and allowed advantages such as water, but the concrete cofferdam general requirements is directly built on basement rock.
It is stronger that stone masonry cofferdam, crib cofferdam, bamboo cage cofferdam, turf cofferdam etc. are used area feature, can be used for that local supplies is abundant, the more engineering of unit in charge of construction's experience.But the cofferdam height is all not too high.
Steel sheet pile cellular cofferdam is applicable to rock foundation or builds on concrete pedestal, also can be used for soft base, and its maximum dash head should be not more than 30m.China's Gezhouba Project once adopted the part of cylindrical shape cellular cofferdam as longitudinal cofferdam.
When carrying out the stage diversion design on not broad riverbed, the longitudinal cofferdam structural shape often needs in conjunction with considerations such as riverbed geological conditions, hinge layouts.Under the deep covering layer geological conditions,, can utilize earth rock cofferdam that the adaptable characteristics of ground are simplified ground and handle, but its section is bigger, influences the layout of foundation ditch, increases the difficulty of scour protection if adopt the earth-rock cofferdam structure pattern; If adopt the concrete cofferdam structural shape, can utilize characteristics such as its section is less, arrange at foundation ditch, have advantage on the scour protection, but the based process difficulty is big, long in time limit, cost is high.
Summary of the invention
The technical problem to be solved in the present invention is at the prior art deficiency, to provide a kind of section less, strong to ground compliance, and can simplify the cofferdam ground and handle, be convenient to the flexible structure cofferdam that foundation ditch is arranged.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of flexible structure cofferdam, it comprises the reinforced gabion that is stacked in the outer both sides of cofferdam section layer by layer, be filler between this reinforced gabion, the average colligation several layers of the short transverse of each reinforced gabion gauze wire cloth reinforced bands reinforced gabion corresponding with the cofferdam opposite side connects; Between every layer of reinforced gabion lacing wire being set is connected to each other; Described gauze wire cloth reinforced bands and lacing wire are embedded in the filler.
Further improvement of the present invention is that the gauze wire cloth reinforced bands of colligation is 1～3 layer between described each reinforced gabion.
Further improvement of the present invention is, described gauze wire cloth reinforced bands adopts five strand gauze wire cloths, and its wire side machinery tensile strength that is parallel to strand system direction is greater than 30kN/m, perpendicular to the wire side machinery tensile strength of strand system direction greater than 10kN/m.
Further improvement of the present invention is, the HRB335 reinforcing bar is adopted in described lacing wire, and diameter is 18mm～25mm.
Compared with prior art, the beneficial effect that the present invention had by: flexible structure cofferdam of the present invention by the enrockment filler at the reinforced gabion of outer both sides, middle part and be embedded in the grinding compacting filler have lacing wire certain tensile strength and that be connected with reinforced gabion, the gauze wire cloth reinforced bands is formed, therefore the present invention not only possesses the characteristics of earth rock cofferdam, can utilize local material to fill forms, strong to ground compliance, reduce the treatment project amount of deep covering layer, save investment, save the duration; Also have the little characteristics of concrete cofferdam cross-sectional area, two side slopes ratio can reach 1: 0.5, and as longitudinal cofferdam, the anti-impact flow velocity reaches 8m/s.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is that structure chart of the present invention fills schematic diagram.
Fig. 3 is the drawing in side sectional elevation of concrete embodiment of the present invention.
The specific embodiment
As shown in Figure 1-Figure 3, flexible structure cofferdam of the present invention comprises the reinforced gabion 1 that is stacked in the outer both sides of cofferdam section layer by layer, and the width of this reinforced gabion is 2.0m, and height is 1.0m, and is provided with gauze wire cloth net cage 2 in the reinforced gabion 1; Be filler 3 between the reinforced gabion 1, the 0.333m of each reinforced gabion 1,0.667m floor height place respectively are provided with layer of steel wire net reinforced bands 4; Between every layer of reinforced gabion 1, promptly the filler top of corresponding every layer of reinforced gabion is provided with lacing wire 5.The HRB335 reinforcing bar is adopted in this lacing wire 5, and diameter is 18mm～25mm.Gauze wire cloth reinforced bands 4 adopts five strand gauze wire cloths, wide 1.0m, 2.0m, 3.0m, 4.0m etc., and the wire side machinery tensile strength that is parallel to strand system direction is greater than 30kN/m; Make the wire side machinery tensile strength of direction greater than 10kN/m perpendicular to strand.Being connected between gauze wire cloth reinforced bands and the outside reinforced gabion, adopt colligation to connect.Gauze wire cloth reinforced bands 4 and lacing wire 5 are embedded in the filler 3 of grinding compacting.
Flexible structure cofferdam of the present invention is construction successively from the bottom to top, and every layer of construction sequence is: 1. (the reinforced gabion skeleton is in place for the reinforced gabion 1 of the outer both sides of installation 1.0m floor height; The bottom skeleton reinforcing steel bar of this reinforced gabion and the lacing wire of having laid welding; Gauze wire cloth net cage 2 is installed in the reinforced gabion skeleton; Reinforced gabion 1 is welded to each other colligation), lay nonweaven geotextile; 2. outer both sides reinforced gabion 1 is filled with building stones, top rebars (lid) welding; 3. the filler 2 of bottom 0.333m floor height paves and rolls; 4. lay the gauze wire cloth reinforced bands 4 at the high-rise place of 0.333m, and be connected with reinforced gabion 1 colligation; 5. the reinforced earth filler 2 of middle part 0.333m floor height paves and rolls; 6. lay the gauze wire cloth reinforced bands 4 at the high-rise place of 0.667m, and be connected with reinforced gabion 1 colligation; 7. the filler 2 of top 0.333m floor height paves and rolls; 8. lay lacing wire 5, reinforced gabion 1 is stretched in this lacing wire 5, and welds with the top skeleton reinforcing steel bar of reinforced gabion 1.
Flexible structure cofferdam of the present invention has reached scale: on the dark covering layer ground of backfill 35m, build the high flexible structure cofferdam of 35m again, and cofferdam retaining soil height 45m.
Claims (4)
1. flexible structure cofferdam, it is characterized in that comprising the reinforced gabion that is stacked in the outer both sides of cofferdam section layer by layer, be filler between this reinforced gabion, the average colligation several layers of the short transverse of each reinforced gabion gauze wire cloth reinforced bands reinforced gabion corresponding with the cofferdam opposite side connects; Between every layer of reinforced gabion lacing wire being set is connected to each other; Described gauze wire cloth reinforced bands and lacing wire are embedded in the filler.
2. flexible structure cofferdam according to claim 1 is characterized in that: the gauze wire cloth reinforced bands of colligation is 1～3 layer between described each reinforced gabion.
3. flexible structure cofferdam according to claim 1, it is characterized in that: described gauze wire cloth reinforced bands adopts five strand gauze wire cloths, its wire side machinery tensile strength that is parallel to strand system direction is made the wire side machinery tensile strength of direction greater than 10kN/m greater than 30kN/m perpendicular to strand.
4. flexible structure cofferdam according to claim 1 is characterized in that: the HRB335 reinforcing bar is adopted in described lacing wire, and diameter is 18mm～25mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100428812A CN101514554A (en) | 2009-03-18 | 2009-03-18 | Flexible structure cofferdam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100428812A CN101514554A (en) | 2009-03-18 | 2009-03-18 | Flexible structure cofferdam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101514554A true CN101514554A (en) | 2009-08-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009100428812A Pending CN101514554A (en) | 2009-03-18 | 2009-03-18 | Flexible structure cofferdam |
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| CN (1) | CN101514554A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102425151A (en) * | 2011-10-24 | 2012-04-25 | 沈阳建筑大学 | Thickness-variable integral type anti-scour gabion for village residential house foundation |
| CN105350542A (en) * | 2015-09-24 | 2016-02-24 | 河海大学 | Foldable conical earthwork cage for stable excavation and stacking and use method thereof |
| CN109208494A (en) * | 2018-10-16 | 2019-01-15 | 湖南省交通规划勘察设计院有限公司 | A kind of reinforcement steel corrugated plating arch form bridges and culverts structure |
| CN112144940A (en) * | 2020-09-28 | 2020-12-29 | 中国电建集团贵阳勘测设计研究院有限公司 | Steel reinforcement gabion bin wall structure suitable for backfilling foundation and construction method |
-
2009
- 2009-03-18 CN CNA2009100428812A patent/CN101514554A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102425151A (en) * | 2011-10-24 | 2012-04-25 | 沈阳建筑大学 | Thickness-variable integral type anti-scour gabion for village residential house foundation |
| CN105350542A (en) * | 2015-09-24 | 2016-02-24 | 河海大学 | Foldable conical earthwork cage for stable excavation and stacking and use method thereof |
| CN109208494A (en) * | 2018-10-16 | 2019-01-15 | 湖南省交通规划勘察设计院有限公司 | A kind of reinforcement steel corrugated plating arch form bridges and culverts structure |
| CN112144940A (en) * | 2020-09-28 | 2020-12-29 | 中国电建集团贵阳勘测设计研究院有限公司 | Steel reinforcement gabion bin wall structure suitable for backfilling foundation and construction method |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090826 |