CN202899144U - Water retaining cofferdam structure - Google Patents
Water retaining cofferdam structure Download PDFInfo
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- CN202899144U CN202899144U CN 201220431898 CN201220431898U CN202899144U CN 202899144 U CN202899144 U CN 202899144U CN 201220431898 CN201220431898 CN 201220431898 CN 201220431898 U CN201220431898 U CN 201220431898U CN 202899144 U CN202899144 U CN 202899144U
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- concrete
- junked tire
- steel sheet
- cofferdam
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Abstract
The utility model relates to a water retaining cofferdam structure. The water retaining cofferdam structure is characterized in that two rows of continuous steel sheet piles are arranged on two sides of a cofferdam in a pilling mode. A pad layer, a sealing bottom concrete layer, a junked tire light precast block core body, horizontal reinforcing bodies, a concrete seepage-proofing wall, a sealing top concrete layer and a cofferdam filling body are arranged in sequence from bottom to top in space defined by the two rows of the continuous steel sheet piles. The center line of the concrete seepage-proofing wall coincides with the center line of the water retaining cofferdam structure. The junked tire light precast block core body is formed by junked tire light precast blocks which are the same in size in a masonry mode. A junked tire light precast block is made of a junked rubber tire, wherein bubble concrete is injected into the junked rubber tire. A layer of the horizontal reinforcing body is arranged every 2-4 layers of the junked tire light precast blocks. The water retaining cofferdam structure has the advantages of being light in self-weight, low in requirements of basic bearing capacity, rapid in construction speed and good in seepage-proofing effect, achieving wastes resource utilization, and reducing construction cost due to the fact that the junked tire light precast blocks and the steel sheet piles are reusable.
Description
Technical field
The utility model relates to a kind of water-retaining cofferdam structure, be particularly related to a kind of junked tire lightweight prefabricated section water-retaining cofferdam structure, belong to water transport, water conservancy, port works field, the construction of water-retaining cofferdam when being applicable to the buildings such as sluice, ship lock, harbour and building and reconstruct.
Background technology
The cofferdam refers in water conservancy, marine traffic engineering are built, for building permanent water conservancy projects, the provisional space enclosing structure of building.Its effect is the position of building that anti-sealing, soil enter building, so that at cofferdam internal drainage, excavation pit, build building.
The cofferdam is divided according to material can be divided into earth rock cofferdam, turf cofferdam, wood sheet-pile cofferdam, crib cofferdam, steel sheet-pile cofferdam, snap close tubing string cofferdam, reinforced concrete earth fill cofferdam etc., and wherein steel sheet-pile cofferdam is widely used a kind of.
Steel sheet pile is a kind of shaped steel with fore shaft, and there are straight plate shape, flute profile and Z-shaped etc. in its cross section, and sizes and interlocking form are arranged, and common are Larsen formula, cold bending thin wall steel sheet pile etc.Its advantage is: intensity is high, squeezes into easily hard soil layer; Can construct in deep water, water resistance is good; Can form on demand the cofferdam of various profiles, and can be repeatedly used, therefore, it of many uses.
Being suitable for of steel sheet pile also has certain limitation: because steel sheet pile is the assembled structure, integral rigidity is less, and its anti-current and scouring capability are poor, should not use in the excessive situation of flow velocity; Because the limitation of the intensity of steel sheet pile own, rigidity often need to arrange strong and close inner support, and follow-up construction is had certain interference; Steel sheet-pile cofferdam should satisfy bottom support power, resists again seepage effect, requires steel sheet pile that enough embedded depths are arranged; Steel sheet pile mainly relies on snap close self density to carry out leakproof, if but not close, the outer lateral water pressure of snap close is excessive, and seepage can appear in steel sheet-pile cofferdam; Owing to still need a large amount of backfill in the steel sheet pile, fetched earth, muck haulage brought very large difficulty, because the proportion of soil is larger, causes easily the lateral deformation that steel sheet pile is larger simultaneously, affects the stagnant water effect of steel sheet pile.
In sum, steel sheet-pile cofferdam is present widely used a kind of cofferdam form, but there are the shortcomings such as easy to leak, the backfill earth volume is large, lateral resistance is poor in it, needs at present that invention one dead load is light, the foundation bearing capacity requirement is low, speed of application fast, the steel sheet pile water-retaining cofferdam structure of good seepage-proof property badly.
The utility model content
The purpose of this utility model is to utilize junked tire lightweight prefabricated section as the cofferdam core body, invents that a kind of dead load is light, the backfill earth volume is little, the foundation bearing capacity requirement is low, speed of application is fast, the steel sheet pile water-retaining cofferdam structure of good seepage-proof property.
In order to realize above-mentioned technical purpose, the utility model has adopted following technical scheme:
A kind of water-retaining cofferdam structure, it is characterized in that the both sides, cofferdam set two row's continuous steel sheet piles, enclose and lay bed course, bottom concrete layer in the space that forms at two row's continuous steel sheet piles, build concrete cut by laying bricks or stones at the bottom concrete layer, every laying layer 2-4 junked tire lightweight core arranges the horizontal reinforcing body 5 of one deck from bottom to up in the space that steel sheet pile, bottom concrete layer, concrete cut three form, and lays bind layer of concrete, cofferdam filling body at junked tire lightweight prefabricated section core body.
Aforesaid light-duty water-retaining cofferdam structure is characterized in that bottom concrete layer and concrete cut poured up at a time, concrete anti-seepage center line of wall and cofferdam structure central lines.
Aforesaid light-duty water-retaining cofferdam structure, it is characterized in that junked tire lightweight prefabricated section core body is to be built by laying bricks or stones by the junked tire lightweight prefabricated section of consistent size to form, the mutual lap length of levels junked tire lightweight prefabricated section is not less than 1/3 of its external diameter when building by laying bricks or stones, and the medium coarse sand backfill is adopted in its space; Junked tire lightweight prefabricated section is that the perfusion cellular concrete is made in the waste and used rubber tyre.。
The structure that the utility model relates to has following effect and advantage:
(1) setting of junked tire lightweight prefabricated section core body utilizes junked tire as shell, has realized the recycling of refuse, and reusable, can overcome the large problem of traditional cofferdam structure backfill earth volume,, reduced construction costs.
(2) junked tire lightweight prefabricated section has the characteristics of light weight, has reduced the requirement for bearing capacity of ground and the lateral pressure of steel sheet pile, and the simultaneously setting of horizontal reinforcing body has improved globality and the switching performance of junked tire lightweight prefabricated section core body.
(3) setting of bottom concrete layer and concrete cut can solve the problem of conventional steel plates pile cofferdam easy to leak.
Description of drawings
Fig. 1 is the utility model water-retaining cofferdam structure profile.
Among the figure: 1-steel sheet pile, 2-bed course, 3-bottom concrete layer, 4 – junked tire lightweight prefabricated section core bodys, the horizontal reinforcing body of 5-, the 6-layer of concrete that binds, 7-concrete cut, 8-cofferdam filling body.
The specific embodiment
The contents such as construction technical requirement of the technical requirements of steel sheet pile construction technical requirements, concreting and maintenance, cofferdam filling body are not repeated in the present embodiment, and emphasis is set forth the embodiment that the utility model relates to structure.
Fig. 1 is the utility model water-retaining cofferdam structure profile, with reference to shown in Figure 1, a kind of water-retaining cofferdam structure, set two row's continuous steel sheet piles 1 in the both sides, cofferdam, enclose laying bed course 2 in the space that forms at two row's continuous steel sheet piles 1, lay bottom concrete layer 3 at bed course 2, build concrete cut 7 by laying bricks or stones, at steel sheet pile 1, bottom concrete layer 3, alternately lay from bottom to up junked tire lightweight prefabricated section core body 4 and horizontal reinforcing body 5 in the space that concrete cut 7 threes form, the laying specification is: every layer 2-4 junked tire lightweight prefabricated section the horizontal reinforcing body 5 of one deck is set, lays the layer of concrete 6 that binds at junked tire lightweight prefabricated section core body 4, cofferdam filling body 8.
Present embodiment, steel sheet pile 1 adopts the Larsen steel sheet pile, and technical data is as shown in table 1, according to geologic information and the long 15000mm of the selected stake of operating condition, embedded depth 7500mm.
Table 1 present embodiment Larsen steel sheet pile technical data
Bed course 2 adopts hardcore beds, and thickness is 400mm, draw water, clear base work carries out padding and compacting after finishing.
Cofferdam filling body 8 adopts clays or delay slag or foundation ditch desilting soil fill to design elevation.
Bottom concrete layer 3 and concrete cut 7 poured up at a times, concrete cut 7 center lines and cofferdam structure central lines.Bottom concrete layer 3 and concrete cut 7 thickness are 300mm, are formed by C25 concreting.Layer of concrete 6 thickness that bind are 300mm, are formed by C25 concreting, and concrete thickness can highly be adjusted according to cofferdam filling body 8.
Junked tire lightweight prefabricated section core body 4 is built by laying bricks or stones by the junked tire lightweight prefabricated section of consistent size and is formed, and the mutual lap length of levels junked tire lightweight prefabricated section is not less than 1/3 of its external diameter when building by laying bricks or stones, and the medium coarse sand backfill is adopted in its space; Junked tire lightweight prefabricated section is the 355.6mm(14 inch by the wheel rim external diameter) junked tire in the perfusion cellular concrete make, cellular concrete adopts unit weight to be not more than 6KN/m3, Mined scale strength should satisfy 28 days intensity 〉=0.8Mpa, degree of mobilization at the cellular concrete of 180mm ± 20mm.
The weld type high-strength steel mesh of mesh size 100mm * 100mm that the braided steel wire of horizontal reinforcing body 5 employing diameter 3mm forms.
The utility model relates to the structure of water-retaining cofferdam, and its construction sequence is as follows:
(1) sets steel sheet pile 1;
(2) close in the space that forms in steel sheet pile 1 dimension, draw water, dredge, the ground in it is cleaned out;
(3) carry out bed course 2 layings and compacting construction;
(4) carry out bottom concrete layer 3 and concrete cut 7 constructions, and poured up at a time;
(5) after bottom concrete layer 3 and concrete cut 7 reach its next procedure construction intensity, carry out 4 constructions of junked tire lightweight prefabricated section core body, and lay horizontal reinforcing body 5 and adopt the medium coarse sand backfill cementation of fissures according to designing requirement;
(6) layer of concrete 6 construction of binding;
(7) after the layer of concrete 6 that binds reaches its next procedure construction intensity, carry out 8 constructions of cofferdam filling body, finish the construction of whole cofferdam structure.
Claims (3)
1. water-retaining cofferdam structure, it is characterized in that the both sides, cofferdam set two row's continuous steel sheet piles, enclose and lay bed course, bottom concrete layer in the space that forms at two row's continuous steel sheet piles, build concrete cut by laying bricks or stones at the bottom concrete layer, every laying layer 2-4 junked tire lightweight prefabricated section core body arranges the horizontal reinforcing body of one deck from bottom to up in the space that steel sheet pile, bottom concrete layer, concrete cut three form, and lays bind layer of concrete, cofferdam filling body at junked tire lightweight prefabricated section core body.
2. light-duty water-retaining cofferdam structure according to claim 1 is characterized in that bottom concrete layer and concrete cut poured up at a time, concrete anti-seepage center line of wall and cofferdam structure central lines.
3. light-duty water-retaining cofferdam structure according to claim 1, it is characterized in that junked tire lightweight prefabricated section core body is to be built by laying bricks or stones by the junked tire lightweight prefabricated section of consistent size to form, the mutual lap length of levels junked tire lightweight prefabricated section is not less than 1/3 of its external diameter when building by laying bricks or stones, and the medium coarse sand backfill is adopted in its space; Junked tire lightweight prefabricated section is that the perfusion cellular concrete is made in the waste and used rubber tyre.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220431898 CN202899144U (en) | 2012-08-29 | 2012-08-29 | Water retaining cofferdam structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220431898 CN202899144U (en) | 2012-08-29 | 2012-08-29 | Water retaining cofferdam structure |
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| Publication Number | Publication Date |
|---|---|
| CN202899144U true CN202899144U (en) | 2013-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220431898 Expired - Fee Related CN202899144U (en) | 2012-08-29 | 2012-08-29 | Water retaining cofferdam structure |
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| CN (1) | CN202899144U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104631476A (en) * | 2015-02-03 | 2015-05-20 | 浙江省水利水电勘测设计院 | Seaside ultra-deep soft foundation floating type steel sheet pile cofferdam and construction method thereof |
| CN110158625A (en) * | 2019-06-24 | 2019-08-23 | 中铁四局集团第二工程有限公司 | Steel sheet pile cofferdam layered bottom sealing structure and method under silt geological condition |
| CN113073666A (en) * | 2021-03-22 | 2021-07-06 | 中交二航局第四工程有限公司 | Island building process for high slope peninsula cable tower construction platform |
| CN113293784A (en) * | 2021-07-06 | 2021-08-24 | 中交二航局第四工程有限公司 | Water retaining ridge for rapidly building island by exposed inclined rock surface in tide level area and island building method |
-
2012
- 2012-08-29 CN CN 201220431898 patent/CN202899144U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104631476A (en) * | 2015-02-03 | 2015-05-20 | 浙江省水利水电勘测设计院 | Seaside ultra-deep soft foundation floating type steel sheet pile cofferdam and construction method thereof |
| CN110158625A (en) * | 2019-06-24 | 2019-08-23 | 中铁四局集团第二工程有限公司 | Steel sheet pile cofferdam layered bottom sealing structure and method under silt geological condition |
| CN110158625B (en) * | 2019-06-24 | 2024-05-14 | 中铁四局集团有限公司 | Layered bottom sealing structure and method for steel sheet pile cofferdam under geological condition of muddy silt |
| CN113073666A (en) * | 2021-03-22 | 2021-07-06 | 中交二航局第四工程有限公司 | Island building process for high slope peninsula cable tower construction platform |
| CN113293784A (en) * | 2021-07-06 | 2021-08-24 | 中交二航局第四工程有限公司 | Water retaining ridge for rapidly building island by exposed inclined rock surface in tide level area and island building method |
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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: 20130424 Termination date: 20170829 |
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| CF01 | Termination of patent right due to non-payment of annual fee |