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Method for computing pressure of soil mass behind retaining wall

Inactive Publication Date: 2012-12-19
YELLOW RIVER ENG CONSULTING
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Problems solved by technology

Since none of these empirical formulas can fully consider various influencing factors of soil pressure, it is a requirement in the design of retaining walls to provide a unified calculation method for soil pressure behind retaining walls that can fully consider various influencing factors. solved problem

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  • Method for computing pressure of soil mass behind retaining wall
  • Method for computing pressure of soil mass behind retaining wall
  • Method for computing pressure of soil mass behind retaining wall

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Embodiment Construction

[0016] The calculation process will be described in detail below through specific examples.

[0017] Such as figure 1 As shown, a concrete retaining wall is built on a rock foundation, and the density of backfill soil behind the wall is ρ= 1800kg / m 3 , the soil obeys the Mohr-Coulomb yield criterion, cohesion c=0 kPa, internal friction angle °, the acceleration due to gravity is 9.81 m / s 2 , to calculate the minimum pressure of the soil behind the retaining wall within a single width.

[0018] The first step is to determine the calculation range of the soil: the height of the backfill soil is 8.00m and the width is 24.00m.

[0019] The second step is to divide the soil within the calculation range into units and nodes: using rectangular units, the numbering of units and nodes adopts the sequence from bottom to top and from left to right, and divides it into 72 units, 91 node.

[0020] The third step is to assign stress vectors to nodes: assign stress vector (direction)...

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Abstract

The invention discloses a method for computing pressure of a soil mass behind a retaining wall. The accurate basis can be improved for the design of the retaining wall or other retaining structures. The method comprises the following steps of: 1, determining a calculating range of the soil mass; 2, dividing a unit and a node; 3, allocating a node stress vector; 4, establishing a unit equation-of-static-equilibrium restriction S1; 5, establishing a node yield criterion restriction S2; 6, establishing a node static boundary condition restriction S3; 7, establishing an objective function T of the pressure of the soil mass behind the retaining wall; and 8, determining a minimum or maximum pressure of the soil mass behind the retaining wall. The method has the advantages that factors such as physico-mechanical properties of the soil mass behind the retaining wall, soil mass range, soil mass boundary conditions, working states of the retaining wall, and the like can be uniformly considered, calculation of soil masses behind different shapes of retaining walls is adapted, the calculating result is accurate, and the accurate basis can be provided for the design of the retaining wall.

Description

technical field [0001] The invention relates to a retaining wall built in geotechnical engineering, in particular to a method for calculating soil pressure behind the retaining wall. Background technique [0002] In geotechnical engineering activities, it is often necessary to build various forms of retaining walls. The pressure of the soil behind the retaining wall is one of the core factors affecting the safety of the retaining wall. Therefore, the accurate calculation of the soil behind the retaining wall The magnitude of the pressure is also the theoretical basis for retaining wall design. Since the soil pressure behind the retaining wall is affected by various factors such as the physical and mechanical properties of the soil, the scope of the soil, boundary conditions and the working state of the retaining wall, empirical formulas are often used in calculations at present, and various assumptions are introduced to obtain the minimum or maximum soil pressure. Sinc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D1/00
Inventor 吴昊刘琳琳陈昭友吴建军耿莉耿波陈娜
Owner YELLOW RIVER ENG CONSULTING
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