River bank cofferdam structure dismantling construction method
A construction method and technology of cofferdam, applied in the direction of infrastructure engineering, building structure, building maintenance, etc., can solve the problems of heavy construction work, high operation cost, and long construction time, so as to reduce construction time and construction cost , The effect of reducing the total amount of construction
Inactive Publication Date: 2020-10-13
SANCHU OF CHINA RAILWAY TUNNEL GROUP
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For this construction process, the construction workload is very large, the operation cost is high, and it takes a lot of construction time
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[0029] This section will describe the specific embodiments of the present invention in detail. The preferred embodiments of the present invention are shown in the accompanying drawings. The function of the accompanying drawings is to supplement the description of the text part of the manual with graphics, so that people can intuitively and vividly understand the text. Each technical feature and overall technical solution of the invention cannot be understood as a limitation on the protection scope of the present invention.
[0030] In the description of the present invention, it should be understood that if the orientation description is involved, for example, the orientation or positional relationship indicated by up, down, front, back, left, and right is based on the orientation or positional relationship shown in the drawings, and only It is for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the devic...
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The invention discloses a river bank cofferdam structure dismantling construction method. The river bank cofferdam structure dismantling construction method comprises the following steps that a foundation pit is filled with water, and a second supporting layer is dismantled; the foundation pit is filled with water till the water level in the foundation pit is flush with the water level outside a plain concrete wall; a cofferdam outer layer and the plain concrete wall are dismantled in a layered mode; a soil layer below the cofferdam outer layer and the remaining plain concrete wall are dismantled to be below the elevation line; a first supporting layer and constructional columns are dismantled; soil and concrete around steel pipe piles are removed, and the steel pipe piles are cut and hoisted out of the foundation pit; and bed sweeping detection is conducted. The foundation pit is filled with water, the internal and external pressure difference of a cofferdam structure is balanced through water, the cofferdam structure is prevented from collapsing in the dismantling process, and safety is improved; and the foundation pit does not need to be filled with earthwork, the geotechnical operation amount can be reduced, accordingly, the total construction amount in the dismantling process can be reduced, the construction cost is reduced, and the construction time can be shortened.
Description
Technical field [0001] The invention relates to the technical field of river bank foundation construction, in particular to a construction method for demolition of a river bank cofferdam structure. Background technique [0002] During the construction of the river bottom tunnel, a cofferdam needs to be built on the river bank to build the tunnel entrance section on the river bank. After the main structure of the tunnel entrance section is completed, the cofferdam needs to be removed to install the tunnel immersed tube. When removing the cofferdam, in order to reduce the pressure difference between the inside and outside of the cofferdam and avoid the collapse of the cofferdam, it is necessary to fill the inner side of the cofferdam with earth or sand. After the cofferdam is removed, the filled earth or sand is removed. Dig out. For this construction process, the amount of construction work is large, the operation cost is high, and more construction time is required. Summary of ...
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IPC IPC(8): E02D19/04E04G23/08
CPCE02D19/04E04G23/08
Inventor 欧智勇廖伟平王锡峰钟玉明刘永成杨乐全赵涛涛
Owner SANCHU OF CHINA RAILWAY TUNNEL GROUP