Underwater rock-socketed steel sheet pile cofferdam structure and construction method thereof
A technology of a steel sheet pile cofferdam and a construction method, which is applied in basic structure engineering, construction and other directions, can solve the problems that the anti-scour capability of the steel sheet pile cofferdam needs to be improved, and the construction difficulty of the steel sheet pile insertion and driving is difficult, so as to improve the anti-scour ability, Simple and fast positioning, reducing the effect of disturbance and destruction
Pending Publication Date: 2019-03-15
中铁五局集团贵州工程有限公司
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Problems solved by technology
However, when this construction method is applied to the geological conditions of ordinary rock formations, it is difficult to insert and drive steel sheet piles, and the anti-scouring capacity of steel sheet pile cofferdams needs to be improved.
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[0050] The technical solution of the present invention is further described below, but the scope of protection is not limited to the description.
[0051] Such as Figure 1 to Figure 15 As shown, an underwater rock-socketed steel sheet pile cofferdam structure according to the present invention includes an annular cofferdam surrounded by a plurality of steel sheet piles 1 and an inner support installed inside the annular cofferdam. The lower part of the annular cofferdam It is fixed in the rock-socketed groove 5 by concrete 6 . The ring-shaped cofferdam can be circular, square or other shapes, and the steel sheet piles 1 are connected end-to-end in turn; the construction is carried out in a non-blasting manner, which reduces disturbance and damage to the foundation rock layer, and improves the bearing capacity of the base of the cap 7 to be built. The safety risk is small, and the impact on the water environment and geological environment around the proposed cap 7 is small.
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The invention discloses an underwater rock-socketed steel sheet pile cofferdam structure and a construction method thereof, and belongs to the technical field of bridge foundation construction. The underwater rock-socketed steel sheet pile cofferdam structure comprises an annular cofferdam surrounded by a plurality of steel sheet piles and an inner support arranged on the inner side of the annularcofferdam, and the lower part of the annular cofferdam is fixed in a rock-socketed groove through concrete. The rock-socketed groove is formed in a bedrock layer through a drilling machine, concreteis poured into the rock-socketed groove space at the outer side of the annular cofferdam in a synchronous mode through a hopper device, so that the lower part of the annular cofferdam is fixedly arranged in the rock-socketed groove, and the problem that the steel plate piles are large in insertion difficulty under the rock stratum geological condition is effectively solved, and meanwhile, the anti-scouring capability of the steel plate pile cofferdam is improved; and the non-blasting construction method is adopted for construction, so that the safety risk is effectively reduced, the influenceon the water environment and the geological environment on the periphery of the simulated bearing platform is small, and meanwhile disturbance and damage to the ground bedrock layer are reduced.
Description
technical field [0001] The invention discloses an underwater rock-socketed steel sheet pile cofferdam structure and a construction method thereof, belonging to the technical field of bridge foundation construction. Background technique [0002] When railways and highways cross rivers and bridge foundations are built across rivers, in order to meet the needs of construction and anti-scouring, bridge pier caps are often buried in underwater moderately weathered or even slightly weathered rocks. Due to the commonly used Larsen steel plates Pile and single (double) layer steel cofferdams cannot be driven into moderately weathered or slightly weathered rock formations, which increases the construction difficulty of caps. For example, the Chinese patent document whose publication number is CN102409688A discloses a construction method of a steel sheet pile cofferdam, and the construction method includes the following steps: (1) construction preparation work; (2) measurement setting...
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IPC IPC(8): E02D19/04
CPCE02D19/04
Inventor 杨泉勇李哲袁彬张涛杨涛陈衠苟勇
Owner 中铁五局集团贵州工程有限公司