Soil body shearing testing device and soil body shearing method

Abstract

The invention discloses a soil body shearing testing device. The soil body shearing testing device comprises a special cutting ring, a pressurizing system and a mini-type injection instrument. The shearing testing device is characterized in that a plurality of side holes are formed in the periphery of the special cutting ring; the pressurizing system is composed of a pressurizing top cover, a lever and a weight; the mini-type injection instrument is provided with a conical probe, a reading window and the like. The invention discloses a soil body shearing testing method. According to the brand-new shearing testing device and shearing testing method for determining the shearing strength index of the soil body, the device is simple and convenient to operate; the shearing strength index of the soil body can be determined by only using one test sample and the uniformity of the test sample is guaranteed; the time for injecting the soil body by virtue of the mini-type injection instrument is short and the test sample can be controlled well to discharge water; all the characteristics are good for the accuracy of testing results; the soil body shearing testing device and the soil body shearing testing method are suitable for various civil engineering construction fields.

Description

technical field [0001] The invention belongs to the field of civil engineering, in particular to a soil shear test device and a test method. Background technique [0002] In civil engineering construction, the shear strength index of soil (cohesion force) is required in many fields such as determining the bearing capacity of the foundation, calculating the earth pressure of the retaining wall, and checking the stability of the soil slope. c , internal friction angle j ), the soil shear strength index is obtained through shear tests, and the existing shear test methods include direct shear tests and triaxial shear tests. The direct shear test artificially limits the position of the shear plane, the shear stress distribution is uneven during the shear process, the shear area gradually decreases but is not considered in the calculation, and the drainage cannot be well controlled for a long shear time; three. The axial shear test instrument has complex structure, high price, ...

AI Technical Summary

Problems solved by technology

The direct shear test artificially limits the position of the shear plane, the shear stress distribution is uneven during the shear process, the shear area gradually decreases but is not considered in the calculation, and the drainage cannot be well controlled for a long shear time; three. The axial shear test instrument has complex structure, high price, and high technical requirements for operation, and the conventional triaxial instrument is not a true triaxial instrument in the true sense, but a false triaxial instrument (the middle principal stress is the same as the small principal stress). The above The two tests must use four samples for testing, it is difficult to guarantee the consistency of the samples and the accuracy of the test results

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