A method for predicting the overlying earth pressure of a flexible pipeline based on a three-dimensional soil arching effect

Abstract

The invention relates to a method for predicting the overlying earth pressure of a flexible pipeline based on a three-dimensional soil arching effect, belonging to the field of underground space engineering. By calculating and analyzing the soil arching effect caused by the uneven settlement of the foundation in the overburden of the pipeline, and using the rigid body limit equilibrium theory, theprediction formula of the overburden pressure of the pipeline is established, and then the overburden pressure of the buried flexible pipeline under the uneven settlement of the foundation is calculated. The invention provides a safe and conservative design method for calculating the overburden earth pressure of a buried flexible pipeline under the condition of uneven settlement of a foundation,which is based on a three-dimensional soil arching effect.

Description

technical field [0001] The invention relates to a method for predicting the overlying soil pressure of a flexible pipeline based on the three-way soil arch effect, and belongs to the field of underground space engineering. Background technique [0002] The overlying soil pressure of buried flexible pipelines under uneven foundation settlement is an important parameter to control the deflection of pipelines and evaluate the service status of pipelines. Under the condition of non-uniform settlement of the foundation, the soil pressure on the top of the buried flexible pipeline is the result of the mutual superimposition of the soil arching effect of the overlying soil in the direction of the longitudinal section and the direction of the cross section of the pipeline. The earth pressure calculation formula proposed by Terzaghi based on the two-dimensional soil arch effect does not consider the soil arch effect induced by the uneven settlement of the foundation in the cross-sect...

AI Technical Summary

Problems solved by technology

The earth pressure calculation formula proposed by Terzaghi based on the two-dimensional soil arch effect does not consider the soil arch effect induced by the uneven settlement of the foundation in the cross-sectional direction of the pipeline, which makes it underestimate the pressure of the buried flexible pipeline under the uneven settlement of the foundation. overlying soil pressure

At the same time, in my country's existing codes ("Technical Specifications for Buried Plastic Drainage Pipeline Engineering CJJ 143-2010"), there is no prediction method for the overlying soil pressure of buried flexible pipes under uneven foundation settlement.

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