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Settlement calculation method of grid-type diaphragm wall bridge foundation in soft soil foundation

A technology of underground diaphragm wall and calculation method, applied in the field of geotechnical engineering, to achieve the effect of avoiding material waste and optimizing design

Active Publication Date: 2018-02-09
SOUTHWEAT UNIV OF SCI & TECH
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to solve the unresolved problem of settlement calculation of the existing new type of bridge foundation on soft soil foundation - lattice type underground diaphragm wall, and proposes the settlement of bridge foundation of lattice type underground diaphragm wall on soft soil foundation The calculation method, the present invention draws lessons from the relevant calculation theory of the load transfer method in the pile foundation settlement calculation, and simultaneously considers the structural characteristics and bearing characteristics of the grid-type diaphragm wall itself, and proposes a calculation method suitable for the settlement of the grid-type diaphragm wall foundation

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  • Settlement calculation method of grid-type diaphragm wall bridge foundation in soft soil foundation
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  • Settlement calculation method of grid-type diaphragm wall bridge foundation in soft soil foundation

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[0045] In order to make the purpose, technical solutions and advantages of the present invention clearer, the following technical solutions in the present invention are clearly and completely described. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0046] The load sharing percentage of the soil reaction force of the grid diaphragm wall cap in the soft soil foundation is small and negligible, so it will not be considered in the settlement calculation. The wall body of the grid-type ground connection wall is mainly composed of the wall top load P, the outer friction resistance f w , inner friction resistance f n , External wall end resistance N w and inner wall end resistance N n form a static equilibrium....

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Abstract

The invention provides a settlement calculation method of a grid-type diaphragm wall bridge foundation in a soft soil foundation. According to the method, the structural characteristics of the grid-type diaphragm wall foundation itself in the soft soil foundation are taken into account; based on the foundation settlement characteristics, calculation of the frictional resistance on the outer side of a wall body is deduced, meanwhile the concept of equivalent shear stiffness is put forward and used for calculating the frictional resistance on the inner side of the wall body, and finally based ona load transfer method, the foundation settlement amount under various levels of load can be calculated by means of iterative calculation. According to the method, it is unnecessary to conduct special geotechnical engineering investigation, and the method provides a scientific basis for engineering design and construction of the soft soil foundation to which the novel grid-type diaphragm wall bridge foundation are applied.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a settlement calculation method for grid-type underground diaphragm walls and bridge foundations on soft soil foundations. Background technique [0002] The grid-type underground diaphragm wall foundation refers to the foundation form in which the adjacent underground diaphragm walls are connected by rigid joints to form a plane-closed rectangular frame and a roof (cap) is set. In the cross-section of the foundation, the one with only one closed cell is called the single-cell underground diaphragm wall foundation, and the one with more than two closed cells is called the grid-type underground diaphragm wall foundation. In Japan, grid-type underground diaphragm walls have been widely used in bridge foundation engineering. In some dock foundation pits and hydropower projects in China, grid-type diaphragm walls have also been used as enclosures and anti-seepage stru...

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Application Information

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IPC IPC(8): G06F17/50E02D5/18
CPCE02D5/187G06F30/13G06F30/20G06F2119/06
Inventor 吴九江李肖楠王玲娟程谦恭文华张建磊李艳
Owner SOUTHWEAT UNIV OF SCI & TECH
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