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Flow soil stability calculation method for composite soil layer

A technology of composite soil layer and calculation method, which is applied in design optimization/simulation, instrumentation, electrical and digital data processing, etc., can solve the problems of insufficient calculation of fluid soil stability of composite soil layer, etc., and achieve the effect of easy calculation.

Pending Publication Date: 2022-03-15
ZHENGYE ENG & INVESTMENT INC
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Problems solved by technology

[0005] In order to solve the above-mentioned technical problems, the present invention provides a method for calculating the flow soil stability of a composite soil layer. Insufficient Problems in Calculation of Flowing Soil Stability in Soil Layer

Method used

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  • Flow soil stability calculation method for composite soil layer
  • Flow soil stability calculation method for composite soil layer
  • Flow soil stability calculation method for composite soil layer

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Embodiment

[0037] From the above, the method comprises the following steps:

[0038] 1. Determine the total number of soil layers in the seepage direction through the site survey and design documents, denoted by n; and use the soil layer number i of the seepage flow through the soil layer along the seepage direction to represent the flow through the soil layer.

[0039] 2. Obtain the basic physical parameters of each soil layer through indoor tests, in-situ tests and design documents: specific gravity of soil particles G si , permeability coefficient k i , porosity ratio e i , the total soil head difference Δh, the seepage length of each soil layer L i .

[0040] 3. Through the force analysis of the i-th layer of soil, it can be obtained:

[0041] P i A+G i +Q i =P i-1 A+J i (1)

[0042] In the formula: P i-1 is the residual permeability of the i-1th layer of soil on the i-th layer of soil per unit cross-sectional area, which is numerically equal to the binding force of the i...

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Abstract

The invention discloses a flow soil stability calculation method for a composite soil layer. The method comprises the following steps: determining the total number of soil layers in a seepage direction through field exploration and a design file; obtaining a total water head difference delta h of the soil body and basic physical parameters of each soil layer through an indoor test, an in-situ test and a design file; calculating a water head difference between upper and lower interfaces of each soil layer based on the Darcy law and the physical parameters of each soil layer; carrying out stress analysis on the soil skeleton of the ith layer, and establishing a mechanical equilibrium formula by considering gravity, buoyancy, seepage force, constraint force of the soil skeleton of the upper-layer soil body and residual seepage force of the lower-layer soil body; the seepage force is increased, and a soil seepage stability coefficient is introduced; and enabling the residual seepage force of the last layer of soil body to be equal to zero, and solving to obtain a seepage stability coefficient. Compared with an existing method, the method has the advantages that interaction of soil skeletons of the upper and lower soil layers is considered, calculation is convenient, and the seepage stability of the multi-layer soil body can be calculated.

Description

technical field [0001] The invention relates to a calculation method for flow soil stability of a composite soil layer, belonging to the technical field of seepage stability calculation of a soil layer. Background technique [0002] During the construction of buildings and water conservancy projects, the seepage stability of foundation pits and dams has a crucial impact on project safety. Engineering excavation, earth-rock dam water storage, rainfall, artificial precipitation and other engineering and natural activities often cause changes in the formation flow field, which in turn causes changes in seepage force, and the size and direction of seepage force directly affect the stability of the soil layer. The buoyant weight, permeability coefficient, void ratio, and soil particle specific gravity are all important indicators that affect the seepage stability of the soil layer. As the main form of seepage damage, flowing soil usually occurs suddenly, which is very harmful to...

Claims

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Application Information

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IPC IPC(8): G06F30/28G06F119/14
CPCG06F30/28G06F2119/14
Inventor 沈志平刘慧付君宜李振庆彭又贤
Owner ZHENGYE ENG & INVESTMENT INC
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