Stable ship-shaped large sandbag cofferdam structure on soft soil foundation and its construction method
A soft soil foundation and sandbag technology, which is applied in land reclamation and offshore engineering, can solve the problems of casualties and property losses, unpredictability of instability, and affecting the safety and stability of the upper structure of the cofferdam, etc., to achieve strength and rigidity Improve and ensure overall stability and simple operation
Active Publication Date: 2019-05-24
POWERCHINA HUADONG ENG COPORATION LTD
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Problems solved by technology
The failure mode of this large sandbag cofferdam seriously affects the safety and stability of the upper structure of the cofferdam, and the instability is unpredictable, which can easily cause casualties and property losses
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[0033] Such as figure 2 , image 3 As shown, the stable ship-shaped large sandbag cofferdam structure on the soft soil foundation of this embodiment is formed by stacking the large sandbags along the length direction of the cofferdam from large to small. The size of the large sandbag is in the length direction. There are tens of meters or even hundreds of meters, so two or several large sand bags are generally arranged on each layer. Among them, the sand bag 6 at the bottom of the cofferdam is outside the geogrid 3, and the bottom of the geogrid 3 is followed by a sand cushion 4 and a plastic drainage board 5. The outer enclosure of the sand cushion is a geotechnical pipe bag retaining wall 7, and finally the cofferdam The bottom sandbag 6 and the geogrid 3 are fixed with anchor rods 2 to form a steel plate-like structure with excellent integrity.
[0034] The shrinkage size of the outer edge of the upper sandbag relative to the lower sandbag should not be less than twice the th...
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The invention relates to a stable ship type large sand bag cofferdam structure on a soft soil foundation and a construction method thereof. The structure and the construction method thereof aim to improve the strength and rigidity of sand bags on the bottom layer of a cofferdam and control the deformation and breakage of the large sand bag cofferdam, and safety and stability of the cofferdam are guaranteed. According to the technical scheme, the stable ship type large sand bag cofferdam structure on the soft soil foundation is characterized in that the cofferdam structure is formed by stacking large sand bags layer by layer in the length direction of the cofferdam with the large sand bag dimension changing from big to small, the sand bags on the bottom layer of the cofferdam are surrounded by a geogrid, and a sand bed and a plastic drainage plate are sequentially arranged under the bottom of the geogrid; geotextile tube stop ridges are arranged on the periphery of the sand bed and serve as an enclosing structure; and the sand bags on the bottom layer of the cofferdam and the geogrid are fixed into a whole through anchor rods. The stable ship type large sand bag cofferdam structure is suitable for the fields of offshore engineering and reclamation projects.
Description
Technical field [0001] The invention relates to a ship-shaped large sandbag cofferdam structure on a soft soil foundation and a construction method thereof. It is mainly suitable for offshore engineering and land reclamation. Background technique [0002] Under the condition of soft soil foundation in offshore waters, the construction of cofferdams for land reclamation is a commonly used method of land reclamation. Generally, in the coastal marine soft soil, the silty soft soil layer is thick, the foundation treatment is difficult, the cost is high, and the safety is difficult to guarantee. In addition, the project is often in deep water, strong currents, strong typhoons, rivers and other harsh environments. This makes the problem of soft soil foundation more prominent, increasing the difficulty of cofferdam construction. [0003] In order to solve the problems of super soft foundation and underwater construction of cofferdam, such as poor overall stability, uneven settlement, an...
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IPC IPC(8): E02D19/04
CPCE02D19/04
Inventor 汪明元单治钢狄圣杰
Owner POWERCHINA HUADONG ENG COPORATION LTD