A Soil Sample Membrane Device for Soil Dynamic Triaxial Test

Abstract

The invention belongs to the technical field of soil sampling, and in particular relates to a soil sample film loading device for soil dynamic triaxial test, which comprises a sampling hole opened on the ground surface, a second cutting barrel slidingly connected in the sampling hole, and a second cutting barrel slidingly connected in the said sampling hole. The soil fetcher in the second cutting bucket; the soil fetching device includes a first cutting bucket in the second cutting bucket and a casing assembly located in the first cutting bucket that is slidably connected, and the casing assembly is connected to the A cutting unit is arranged between the first cutting barrels, and the bottom end of the mantle assembly is vertically slidably connected to the bottom end of the first cutting barrels; There are a number of buffers arranged at equal intervals in the circumferential direction, and a number of guide sleeves are arranged between the second cutting barrel and the sampling hole, and the outer sides of the guide sleeves are fixedly connected to the inner wall of the sampling hole. The invention can effectively improve the quality of the soil sample casing, significantly reduce the disturbance during the soil sample casing process, and solve the problem that the test is affected by the disturbance.

Description

technical field [0001] The invention belongs to the technical field of soil sampling, and in particular relates to a soil sample membrane packing device for a soil movement triaxial test. Background technique [0002] The soil dynamic triaxial test belongs to the dynamic test content of soil, and is a commonly used method to test the dynamic characteristics of soil indoors. The dynamic characteristics of soil mainly refer to the deformation characteristics and strength characteristics of the soil. The deformation characteristics are the dynamic stress-strain relationship. In addition to the general strength of the soil, the strength problem also includes the vibration liquefaction strength of the liquefiable soil. Soil dynamic testing technology directly affects the development of soil dynamic characteristics research and soil dynamic analysis and calculation. It plays an important role in correctly revealing the laws of soil dynamic characteristics and improving the analysi...

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Problems solved by technology

The difference in the state of the soil sample directly affects the test results. The friction between the inner wall of the sampling cylinder of the existing soil sample mantle and the surface of the soil sample is large, which greatly disturbs the soil sample, and even the waist of the sample may bulge outward. The phenomenon will also appear in the process of pressing down the soil extractor. Due to the uneven force, eccentric force will be generated, which will cause the soil extractor to produce lateral displacement; in the process of covering the film, it is easy to cause friction between the rubber film bag and the soil sample, and change the structure of the soil layer. , which also makes the entire membrane process extremely difficult, and it is difficult to avoid disturbance of the soil sample. Therefore, a soil sample loading device for soil dynamic triaxial testing is urgently needed

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