Testing device and method for measuring soil body fracture toughness by the aid of soil body self-weight

Abstract

The invention provides a testing device and method for measuring soil body fracture toughness by the aid of soil body self-weight. The testing device comprises a testing platform and a soil beam mold, wherein the testing platform comprises a base platform, a fixed support and a sliding support, the base platform adopts a flat-plate structure, the fixed support is a long strip with the rectangular cross section and is fixed on one side of the upper plane of the base platform, the sliding support is placed on the upper plane of the base platform and can slide on the plane, the cross section of the sliding support is rectangular, and rolling bearings or rolling balls are arranged in upper and lower planes of therectangle; an inner cavity of the soil beam mold is rectangular and adopts a detachable rigid structure. With the adoption of the testing method for measuring the soil body fracture toughness by the aid of the soil body self-weight, soil body fracture conditions can be reflected relatively truly and objectively, the soil body fracture toughness parameter can be determined by recording the initial fracture extension length, operations are simple, the device is simple, themeasurement accuracy is higher, and the accuracy requirement for the engineering soil body fracture parameter can be met.

Description

field of invention [0001] The invention relates to the technical field of soil crack parameter testing caused by geological disasters such as side landslides, ground subsidence, and ground subsidence, and in particular relates to a testing device and method for measuring the fracture toughness of soil based on the self-weight of the soil. Background technique [0002] my country's mountains and hills account for more than 2 / 3 of the total land area. With the establishment of large-scale engineering projects in my country and the rapid development of mountainous urban construction, the number of geological disasters such as side landslides, ground subsidence, and ground subsidence is increasing, and the geological disasters are becoming more and more serious. Geological safety The problem is becoming more and more prominent. Ground fissures formed by side landslides, ground subsidence, and ground subsidence are common associated geological disasters at present, and have the ch...

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Problems solved by technology

[0004] In order to solve the problems existing in the soil fracture toughness measurement method of the prior art, such as the difficulty of the soil beam, the difficulty of the test and the inaccurate test results, the present invention proposes a testing device and method for measuring the fracture toughness of the soil relying on the self-weight of the soil

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