Long-distance continuous measurement method for soil body softening parameters of soft soil site

Abstract

The invention provides a long-distance continuous measurement method for soil body softening parameters of a soft soil site. The bottom end of a dragging device is provided with a soil body strain softening relationship measurement device, the dragging device actively or passively travels in a soft soil layer, it is guaranteed that a part of the dragging device penetrates into the to-be-measured soil layer during travelling, and the soil entering depth of the dragging device is controlled by adjusting a counterweight on the upper part of the dragging device and the dragging angle. By adoptingthe method, the influence on the softening parameter measurement result due to the particularity of a test point in a traditional single-point vertical measurement method is avoided, transverse long-distance continuous field measurement of the soil body strain softening parameters can be completed through a one-time dragging test, and the measured parameters can be used for guiding design and construction of breakwater projects and projects such as submarine oil and gas pipelines, cables and optical cables. Especially, with the increasing development of deep-sea oil and gas resources, throughthe provided method, it is of great significance to measure the submarine soil body softening parameters and apply the submarine soil body softening parameters to design of project facilities such asthe submarine pipelines and the submarine cables and stability evaluation of submarine slopes.

Description

technical field [0001] The invention belongs to the technical fields of rock and soil, geology and environment, and relates to a long-distance continuous measurement method for soil softening parameters in soft soil sites, and the method is especially suitable for the investigation of underwater soil softening parameters. Background technique [0002] As a kind of bad soil, soft soil generally has the characteristics of high natural water content, large natural void ratio, high compressibility, low shear strength, small consolidation coefficient, long consolidation time, high sensitivity, and poor water permeability. Therefore, structural design and construction carried out on soft soil sites have higher risks. The softening phenomenon of soil is one of the important factors affecting the bearing capacity and stability of structures. Accurate and continuous measurement of soil softening parameters in soft soil sites is of great significance for reducing engineering risks and...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the existing experimental method cannot realize the long-distance horizontal measurement of soil softening parameters, the present invention proposes a method for measuring soil softening parameters horizontally and continuously, which is applicable to weak bottoms of lakes, swamps, rivers, oceans, etc. The measurement of soil softening parameters in the soil layer is used for breakwaters, submarine oil and gas pipelines, cables, optical cables and other projects that rely on shallow soil softening parameters for design and construction

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