Construction method for small-spacing long-large underwater sheet steel pile cofferdams
A steel sheet pile cofferdam and construction method technology, applied in the direction of infrastructure engineering, construction, etc., can solve the problems of consuming construction materials, increasing construction costs, and difficulties in earthwork excavation, so as to reduce construction costs, save construction period, and save temporary Effects of Structural Materials and Duration
Inactive Publication Date: 2017-01-11
CHINA TIESIJU CIVIL ENG GRP CO LTD
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[0002] With the development of railways, highways and municipal road traffic in our country, small-space bridges such as rivers, rivers, lakes, and seas are in a stage of rapid development. Generally, multiple cofferdams are constructed according to the size of a single foundation pit, which consumes a lot of construction materials and increases the construction cost, and due to the mutual interference between the foundation pits of a single cofferdam, it is difficult to excavate the earthwork. The large steel sheet pile foundation pit cofferdam replaces the traditional multiple foundation pit cofferdams, and the bridge foundations can be constructed simultaneously, which can not only improve construction efficiency, ensure the construction period, but also save construction materials and construction costs
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[0031] Referring to the accompanying drawings, the construction method of steel sheet pile cofferdams in small-space and long-distance water is applied on the soil layer on the inclined surface, which specifically includes the following steps:
[0032] ⑴Construction preparation
[0033] Check the mechanical equipment and steel sheet piles entering the site. All steel sheet piles that are bent, damaged, or locked must be repaired.
[0034] ⑵Water guide beam installation
[0035] Drive the steel pipe positioning piles into the four corners of the foundation pit and at intervals of 6m on each side; after the steel pipe positioning piles are inserted to the designed position, the section steel corbels are welded on the steel pipe positioning piles at a position 1m below the top of the steel sheet piles, and the corbels are welded For fixed section steel or steel sheet pile guide beams, in order to ensure the accuracy of the plane position of the steel sheet piles, two rows of st...
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The invention discloses a construction method for small-spacing long-large underwater sheet steel pile cofferdams. The construction method comprises the steps of underwater guide beam mounting, sheet steel pile inserting and driving, cofferdam closure, reverse anchoring system arrangement, foundation pit excavation, steel enclosing purlin and steel support arrangement, foundation pit monitoring, steel enclosing purlin and steel support dismantling, sheet steel pile removal and the like. The method is applicable to synchronous construction of two or more underwater small-spacing bridge group foundation sheet steel pile cofferdams in rivers, lakes, seas and the like, and a reverse anchoring system adopted in the method can balance active earth pressure on two sides of sheet steel piles on an inclined earth layer; and when the method is selected for construction, synchronous construction of small-spacing bridge group foundations can be realized, so that the construction efficiency and the construction speed are increased, the construction period is guaranteed, the material consumption of temporary structures is reduced and the construction cost is lowered.
Description
technical field [0001] The invention belongs to a construction method, in particular to a method for synchronous construction of steel sheet pile cofferdams for foundations of two or more group bridges with small intervals in water such as rivers, rivers, lakes and seas. Background technique [0002] With the development of railways, highways and municipal road traffic in our country, small-space bridges such as rivers, rivers, lakes, and seas are in a stage of rapid development. Generally, multiple cofferdams are constructed according to the size of a single foundation pit, which consumes a lot of construction materials and increases the construction cost, and due to the mutual interference between the foundation pits of a single cofferdam, it is difficult to excavate the earthwork. The large steel sheet pile foundation pit cofferdam replaces the traditional multiple foundation pit cofferdams, and the bridge foundations can be constructed simultaneously, which can not only ...
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IPC IPC(8): E02D19/04
CPCE02D19/04E02D2300/0029
Inventor 朱海建胡松涛许炳刚孙渝波丁小龙潘尚昆潘涛王恒阮再龙刘永红施晓梅杨莹
Owner CHINA TIESIJU CIVIL ENG GRP CO LTD
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