Indoor testing device for reaction coefficients of lateral foundation bed under different stress paths

Abstract

The invention discloses an indoor testing device for reaction coefficients of a lateral foundation bed under different stress paths. The indoor testing device comprises a testing box, a loading device and a flat dilatometer, wherein the testing box consists of a metal frame and an organic glass plate; an opening is locally formed in a single side surface of the testing box to obtain a cavity which allows a load plate to be pushed in freely; an opening is formed in the top surface of the testing box and two supporting rods for fixing a jack reaction frame are arranged in the opening of the top surface. The loading device provides a force source for the penetration test of the flat dilatometer and different stress path loading tests of load plates on the top surface and the side surfaces of a soil body, and the magnitude of the applied load is read by a pressure sensor mounted on the loading device. The device can be used for comprehensively measuring the reaction coefficients of the lateral foundation bed of the soil body under the different stress paths and the change rule of the reaction coefficients, and has the advantages of high efficiency, simplicity and convenience, and speediness.

Description

technical field [0001] The invention belongs to the field of geotechnical engineering testing, and relates to the problem of determining the reaction force coefficient of the soil lateral foundation bed in the design of horizontal load piles, foundation pit enclosure and tunnel support, specifically a lateral foundation under different stress paths. Bed reaction coefficient indoor test device. Background technique [0002] The lateral subgrade reaction coefficient is an important engineering parameter in the design of horizontal loaded piles, foundation pit enclosure and tunnel support, which is affected by many factors. At present, the reliability of various engineering testing methods is low, and the accuracy of in-situ testing is difficult to guarantee. However, the range of the lateral subgrade reaction coefficient of each soil layer given in the standard method varies greatly, and it is difficult to determine the specific value in combination with the actual soil layer...

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: In order to overcome the deficiencies and defects of the existing methods for determining the lateral subgrade reaction coefficient of soil, the present invention proposes an indoor testing device for testing the lateral subgrade reaction coefficient under different stress paths, thereby facilitating the study of different states The Value and Variation Law of Reaction Coefficient of Soil Lateral Subgrade

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