Method for testing soft soil micro disturbance

Abstract

The invention belongs to the field of rock test, and in particular relates to a method for testing soft soil micro disturbance. The method comprises the following steps of: flattening the ground of a region to be tested; then horizontally arranging a soil body disturbance device in the region to be tested, wherein heavy hammer weights are arranged on the soil body disturbance device; selecting the heavy hammer weight having the corresponding mass according to disturbance energy required by a soil body, and arranging the selected heavy hammer weight at the corresponding height and enabling the selected heavy hammer weight to fall down so as to make disturbance on the soil body in the region to be tested; taking away the soil body disturbance device, and spreading yellow sand on the soil body in the region to be tested; and finally testing the soil body in the region to be tested according to the K30 test to obtain a K30 coefficient of the soil body in the region to be tested. The method has the advantages that disturbance at different degrees can be applied to the soil body on the site, so that the tested soil body parameters can better accord with actual data; the distortion of the soil taking test in a laboratory and the boundedness of the test after construction are effectively avoided; the soil body disturbance device is simple in structure; and the operation method is simple and convenient.

Description

technical field [0001] The invention belongs to the field of rock and soil testing, and in particular relates to a soft soil micro-disturbance testing method. Background technique [0002] Soil is the product of natural deposition, which is a three-phase body containing solid particles, water and air. The soil has a complex structure at the microscopic level. Different particle components and different structural forms have a great impact on the structural strength of the soil. The adjustment of components and structural forms also has a significant impact on the strength. This characteristic of the soil is reflected in the macroscopic manifestation of the change of soil properties due to engineering activities, and the required engineering measures are very different. Therefore, the degree of soil disturbance and the corresponding strength and deformation law are very concerned issues in engineering. [0003] There are many factors that cause soil disturbance, which can b...

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Problems solved by technology

[0004] In-situ test is a test method carried out on site, including conventional load plate test, static penetration test, standard penetration test, etc. These conventional methods can evaluate the soil after construction disturbance, but cannot Considering the change of soil parameters under different disturbance degrees

[0005] To sum up, in the existing methods, the remodeling sample in the indoor test actually completely destroys the structure of the soil, which is not in the category of micro-disturbance; while the in-situ test method only passively evaluates the strength of the soil after complete disturbance and deformation index

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