Large 3D multifunction soil tester

Abstract

The invention relates to large scale three-dimensional multifunctional geotechnical test machine. Its feature is that it includes mainframe part and container component. The former includes main frame, level xy directional and vertical weighted platform. The level xy directional weighted platform includes two perpendicular x and y directions weighted platform. The x directional weighted platform is set the bottom, can make the upper y directional one move along the x direction by x direction servo moving machine. The y direction weighted platform can make the loading bearing platform fixed on it move along the y direction by y direction servo moving machine. The vertical weighted platform is used to supply vertical pressure. The invention has good loading ability, can realize multi geotechnical test.

Description

Technical field: [0001] A large-scale three-dimensional multifunctional soil engineering testing machine belongs to the technical field of mechanical property testing, and in particular relates to the technical field of mechanical property testing of soil and a contact surface. Background technique: [0002] The evaluation of the mechanical properties of the soil-structure interface is an important part of the study of soil-structure interaction, and its rationality is related to whether the safety of the soil-structure system can be correctly evaluated. The soil-structure contact surface test is a basic method to reveal the mechanical properties of the soil-structure contact surface. Scholars from various countries have conducted a lot of research in this field and developed many instruments and equipment. [0003] Existing test instruments and equipment mainly include direct shear instrument, simple shear instrument, torsional shear instrument, dynamic triaxial instrument ...

AI Technical Summary

Problems solved by technology

However, the equipment still has the following deficiencies in the study of the mechanical properties of the contact surface: 1) The vertical pressure does not directly act on the contact surface, but indirectly acts on the contact surface by acting on the soil, so the soil and Factors such as friction between the side walls of the container may cause large errors in vertical pressure measurement, and this error is difficult to calibrate and eliminate in advance; 2) The loading capacity is small, and the maximum loading capacity of the three directions of C3DSSI is 10KN ; 3) The sample area is small, and the largest cross-sectional area is only 100mm×100mm; 4) The single shear test can only measure the displacement of the uppermost stacked ring, but cannot measure the displacement of each stacked ring; 5) The function is single, Only direct shear and simple shear tests of the contact surface can be carried out

Due to the limitation of loading capacity and sample size, the existing test equipment can only be used for the test of fine-grained soil such as sandy soil, but cannot be used for the study of the properties of coarse-grained soil with larger particle size

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