Bag pressure testing method and testing device

Abstract

The invention relates to a bag pressure testing method and device in the fields of geotechnical engineering detection testing and underground engineering construction. The core idea is that a plurality of sealed bags (1) are buried in a soil body, through filling fluid into the sealing bag (1), loading or unloading of a test point is realized. Through meausring the volume and the pressure intensity of the filled fluid, the displacement and stress of the soil body at the periphery of the sealing bag (1) are calculated. Through multi-point setting, the clearness of the boundary condition of thein-situ test is realized, and a multi-parameter in-situ test result can be obtained. Five bag pressure testing methods and three bag pressure testing devices are provided. The method overcomes the substantive defects of unclear boundary conditions and single test parameters of the soil in-situ test, can be directly applied to soil stabilization and deformation calculation, can also be used for testing and controlling a soil stress field in underground engineering construction such as a shield and a jacking pipe, and is simple in test method, stable in data and high in precision.

Description

technical field [0001] The invention relates to the fields of geotechnical engineering detection and testing and underground engineering construction. Background technique [0002] Geotechnical engineering inspection and testing is one of the important basis for providing basic geotechnical stability and deformation calculation parameters for civil engineering design and construction, and is also one of the main technical means for providing basic soil property data for civil engineering construction. In recent decades, although the geotechnical engineering detection and testing technology has developed, the progress is slow. Until now, the geotechnical engineering in-situ testing techniques that can be applied to engineering practice mainly include static penetration test, cross plate shear test, lateral pressure test, and penetration test. The technical progress in this field does not match the booming geotechnical engineering requirements. The main manifestations are tha...

AI Technical Summary

Problems solved by technology

It is precisely because the current development of geotechnical in-situ testing technology cannot meet the needs of geotechnical engineering activities, resulting in engineering practice. On the one hand, there is a lack of accurate calculation and analysis basis. The method may cover up some unfavorable factors and cause engineering accidents

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