CN101614017A - A kind of job practices of deep water earth-rock cofferdam structure - Google Patents
A kind of job practices of deep water earth-rock cofferdam structure Download PDFInfo
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- CN101614017A CN101614017A CN 200910100647 CN200910100647A CN101614017A CN 101614017 A CN101614017 A CN 101614017A CN 200910100647 CN200910100647 CN 200910100647 CN 200910100647 A CN200910100647 A CN 200910100647A CN 101614017 A CN101614017 A CN 101614017A
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Abstract
The present invention relates to a kind of job practices of deep water earth-rock cofferdam structure.Technical problem to be solved by this invention provides under a kind of deep water conditions, and the construction period is short, construction intensity is little, the earth-rock cofferdam structure job practices of good stability.The technical scheme that addresses this problem is: a. is the erection construction pontoon bridge when ordinary water level; B. utilize the pontoon bridge location to throw the back-up sand layer of gravel then; C. between sand gravel layer and rock ballast body II and rock ballast body I, utilize pontoon bridge to throw successively to rockfill slag body III and rock ballast body IV; D. after treating that reservoir level is reduced to level of dead water,, utilize bulldozer to advance method and concentrate to push away and fill out the weathering layer of sand from two sides, left and right sides end above the sand gravel layer, between rock ballast body III and the rock ballast body IV; E. the slag body V that rockfills is thrown in follow-up in weathering layer of sand upstream and downstream both sides; F. above weathering layer of sand and rock ballast body V, adopt the subregion layered rolling to fill rock ballast body VI.That the present invention is applicable to is strict to water level, (reservoir, lake) in the strict deep water of construction period built earth rock cofferdam.
Description
Technical field
The present invention relates to a kind of job practices of deep water earth-rock cofferdam structure.Mainly be applicable to strict to water level, (reservoir, lake) in the strict deep water of construction period built earth rock cofferdam.
Background technology
No matter be newly-built key water control project water retaining structure or the key water control project water retaining structure of having built, As time goes on, all inevitably there are problems such as maintenance, reinforcing, in order thoroughly to keep in repair, to reinforce, often need in reservoir, build earth rock cofferdam, so that form the dry work condition at upstream face, because influences such as environmental protection, power station operations, reservoir level is required again very strictness, and for this reason, the construction depth of water is often darker.The earth-rock cofferdam structure design is extremely important under the deep water conditions.Simultaneously, in order to reduce construction infection, construction period is very strict, and job practices seems extremely important for this reason.
Summary of the invention
The technical problem to be solved in the present invention is: material behavior and subaqueous construction characteristic at the problem of above-mentioned existence is filled material in conjunction with the cofferdam, provide under a kind of deep water conditions, and the construction period is short, construction intensity is little, the earth-rock cofferdam structure job practices of good stability.
The technical solution adopted in the present invention is: a kind of job practices of deep water earth-rock cofferdam structure is characterized in that may further comprise the steps:
A, when ordinary water level the erection construction pontoon bridge, utilize pontoon bridge to locate successively to throw and fill out cofferdam rock ballast body I and rock ballast body II, its side slope is not suddenly in 1: 1.5, elevation is the following 47m of ordinary water level;
B, utilize pontoon bridge location to throw the back-up sand layer of gravel then, its side slope is not suddenly in 1: 1.7, and elevation is the following 45m of ordinary water level;
C, utilize pontoon bridge to throw successively to rockfill slag body III and rock ballast body IV between sand gravel layer and rock ballast body II and rock ballast body I, and its outside side slope is suddenly in 1: 1.5, inslope is not suddenly in 1: 1.7, and elevation is the following 32m of ordinary water level;
D, treat that reservoir level is reduced to level of dead water after, above the sand gravel layer, between rock ballast body III and the rock ballast body IV, utilize bulldozer to advance method and concentrate to push away and fill out the weathering layer of sand from two sides, left and right sides end, adopt vibro replacement stone column to shake then and dash, its side slope is not suddenly in 1: 2.0, and elevation is higher than level of dead water 1.5m;
E, throw the slag body V that rockfills in weathering layer of sand upstream and downstream both sides follow-ups, its side slope is not suddenly in 1: 1.5, and elevation and weathering layer of sand top are fair;
F, adopt the subregion layered rolling to fill rock ballast body VI above weathering layer of sand and rock ballast body V, its side slope is not suddenly in 1: 1.5.
Described cofferdam structure is provided with a plastic concrete impervious wall that runs through weathering layer of sand and sand gravel layer.
The invention has the beneficial effects as follows: the present invention reasonably combines material behavior and the subaqueous construction characteristic that material is filled in the cofferdam, construct according to a definite sequence, thereby significantly reduced construction period and construction intensity, guaranteed that also deep water fills reliability of structure simultaneously.
Description of drawings
Fig. 1 is a profile of the present invention.
Fig. 2 is the construction technology schematic diagram of a among the present invention, b, three steps of c.
The specific embodiment
As shown in Figure 1 and Figure 2, present embodiment may further comprise the steps:
A, when ordinary water level 10 the erection construction pontoon bridge, utilize pontoon bridge to locate throwing successively and fill out cofferdam rock ballast body I1 and rock ballast body II2, both side slopes are not all suddenly in 1: 1.5, elevation is ordinary water level 10 following 47m, pontoon bridge is a kind of provisional bridge or the building that swims waterborne, formed by several buoyancy tank unit with good versatility and interchangeability, extensively apply to traffic support, water project construction and special engineering field, owing to adopt modular technology, mobility strong fills material and adopts the transportation of 20t dump truck;
B, utilize pontoon bridge location to throw back-up sand layer of gravel 3 then, its side slope is not suddenly in 1: 1.7, and elevation is ordinary water level 10 following 45m;
C, between sand gravel layer 3 and rock ballast body II2 and rock ballast body I1, utilize pontoon bridge to throw successively to rockfill slag body III4 and rock ballast body IV5, the outside side slope of rock ballast body III4 and rock ballast body IV5 is not suddenly in 1: 1.5, inslope is not suddenly in 1: 1.7, and elevation is ordinary water level 10 following 32m;
D, treat that reservoir level is reduced to level of dead water 11 after, above the sand gravel layer 3, between rock ballast body III4 and the rock ballast body IV5, utilize bulldozer to advance concentrated the pushing away of method and fill out weathering layer of sand 6 from two sides, left and right sides end, adopting vibro replacement stone column to shake then dashes, fill the density of weathering layer of sand 6 with increase, its side slope is not suddenly in 1: 2.0, and elevation is higher than level of dead water 1.5m;
E, throw the slag body V7 that rockfills in weathering layer of sand 6 upstream and downstream both sides follow-ups, its side slope is not suddenly in 1: 1.5, and elevation and weathering layer of sand 6 tops maintain an equal level, and fill material and adopt the 20t dump truck to transport;
F, adopt the subregion layered rolling to fill rock ballast body VI8 above weathering layer of sand 6 and rock ballast body V7, rock ballast body VI8 top width is 10m, and side slope is not suddenly in 1: 1.5.In this example, the difference in height between ordinary water level 10 and the level of dead water 11 is 20m, and therefore, the height of rock ballast body VI8 should promptly when reservoir level returns to ordinary water level 10, should not have the top of rock ballast body VI8 less than 18.5m.
In order to prevent seepage, cofferdam structure is provided with a plastic concrete impervious wall 9 that runs through weathering layer of sand 6 and sand gravel layer 3.
Claims (2)
1, a kind of job practices of deep water earth-rock cofferdam structure is characterized in that may further comprise the steps:
A, when ordinary water level (10) the erection construction pontoon bridge, utilize pontoon bridge to locate successively to throw and fill out cofferdam rock ballast body I (1) and rock ballast body II (2), its side slope is not suddenly in 1: 1.5, elevation is the following 47m of ordinary water level (10);
B, utilize pontoon bridge location to throw back-up sand layer of gravel (3) then, its side slope is not suddenly in 1: 1.7, and elevation is the following 45m of ordinary water level (10);
C, between sand gravel layer (3) and rock ballast body II (2) and rock ballast body I (1), utilize pontoon bridge to throw successively to rockfill slag body III (4) and rock ballast body IV (5), and its outside side slope is not suddenly in 1: 1.5, inslope is not suddenly in 1: 1.7, and elevation is the following 32m of ordinary water level (10);
D, treat that reservoir level is reduced to level of dead water (11) after, between sand gravel layer (3) top, rock ballast body III (4) and rock ballast body IV (5), utilize bulldozer to advance concentrated the pushing away of method and fill out weathering layer of sand (6) from two sides, left and right sides end, adopting vibro replacement stone column to shake then dashes, its side slope is not suddenly in 1: 2.0, and elevation is higher than level of dead water (11) 1.5m;
E, throw the slag body V (7) that rockfills in weathering layer of sand (6) upstream and downstream both sides follow-ups, its side slope is not suddenly in 1: 1.5, and elevation and weathering layer of sand (6) top are fair;
F, adopt the subregion layered rolling to fill rock ballast body VI (8) in weathering layer of sand (6) and rock ballast body V (7) top, its side slope is not suddenly in 1: 1.5.
2, the job practices of a kind of deep water earth-rock cofferdam structure according to claim 1 is characterized in that: described cofferdam structure is provided with a plastic concrete impervious wall (9) that runs through weathering layer of sand (6) and sand gravel layer (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101006470A CN101614017B (en) | 2009-07-13 | 2009-07-13 | Construction method of deep water earth-rock cofferdam structure |
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| CN2009101006470A CN101614017B (en) | 2009-07-13 | 2009-07-13 | Construction method of deep water earth-rock cofferdam structure |
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| CN101614017A true CN101614017A (en) | 2009-12-30 |
| CN101614017B CN101614017B (en) | 2011-06-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105839653A (en) * | 2016-05-18 | 2016-08-10 | 中铁隧道集团二处有限公司 | Construction method for reconstructing cofferdam anti-seepage system in immersed tube tunnel |
| CN109484883A (en) * | 2017-09-11 | 2019-03-19 | 广东省航运规划设计院有限公司 | A kind of mountain stream region multistage unloading process system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587397A (en) * | 2012-03-13 | 2012-07-18 | 中建五局土木工程有限公司 | Steel bearing plate soil-and-stone combined coffer structure and construction method thereof |
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2009
- 2009-07-13 CN CN2009101006470A patent/CN101614017B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105839653A (en) * | 2016-05-18 | 2016-08-10 | 中铁隧道集团二处有限公司 | Construction method for reconstructing cofferdam anti-seepage system in immersed tube tunnel |
| CN105839653B (en) * | 2016-05-18 | 2018-06-08 | 中铁隧道集团二处有限公司 | A kind of immersed tube tunnel rebuilds the construction method of seepage prevention of cofferdam system |
| CN109484883A (en) * | 2017-09-11 | 2019-03-19 | 广东省航运规划设计院有限公司 | A kind of mountain stream region multistage unloading process system |
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| CN101614017B (en) | 2011-06-08 |
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