Soil sampling and grouting device for model test in geotechnical engineering and use method

Abstract

The invention discloses a soil sampling and grouting device for a model test in geotechnical engineering and a use method. The soil sampling and grouting device comprises a pressure applying device and a soil sampling device. The pressure applying device is used for applying pressure to the soil sampling device so as to press the soil sampling device into rock soil. The pressure applying device comprises a connecting plate, a lead screw and a plurality of supporting rods. A threaded hole is formed in the connecting plate, and the lead screw and the threaded hole are installed in a matched mode. One end of each supporting rod is fixed to the lower end face of the connecting plate, and the other end of each supporting rod is used for being supported on rock soil. The soil sampling device comprises a soil sampling pipe, a plurality of thorn protrusions and a pressing block. One end of the soil sampling pipe is connected with the pressing block, and the thorn protrusions are arranged in the soil sampling pipe and are close to the other end of the soil sampling pipe. According to the invention, the internal stress state of the soil body is not influenced as much as possible, the integrity of the soil body is ensured as much as possible, and the test result accuracy is improved.

Description

technical field [0001] The invention belongs to the application field of model tests, and in particular relates to a soil-taking and grouting device for model tests in geotechnical engineering and a use method. Background technique [0002] With the progress of my country's economic construction and large-scale infrastructure construction, the construction of governance engineering and the level of science and technology in geotechnical engineering in my country are also constantly improving, among which new support methods and types of support structures are emerging, such as anchor support, reinforcement The emergence and gradual maturity of means such as retaining wall and cement grouting provide a powerful method for stabilizing slopes. As a deep foundation, the pile foundation is also widely used in engineering practice. The function of the pile foundation is to transfer the load to the deep buried hard soil layer through the pile, or to the foundation through the fricti...

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Problems solved by technology

[0003] In view of the above description of the model test pile foundation in the field of geotechnical engineering, there are still the following problems that have not been well resolved: 1. The method of soil extraction has a significant impact on the physical and mechanical properties of the slope and the surrounding soil of the pile foundation. The device is embedded in the soil by hammering or vibrating, which will obviously affect the internal stress state of the soil and greatly affect the accuracy of the test results; The earthenware is pulled out together, affecting the integrity of the internal soil, resulting in an impact on the accuracy of the test results

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