Rapid estimation method for physical and mechanical parameters of tillite soil

Abstract

The invention provides a rapid estimation method for physical and mechanical parameters of tillite soil, which summarizes the statistical relationship between the moisture content, the porosity ratio,the clay content and other physical and mechanical parameters through a large amount of field tests in the early stage and data analysis of indoor tests. The method comprises the following steps: firstly, simply testing the water content, the natural density and the clay content of a fresh section of a tillite soil accumulation body; estimating other relatively complex engineering mechanical indexes such as the porosity ratio, the compression index, the shear strength, the compressive strength, the permeability and the expansibility according to the test data statistical relational expressionamong the parameters, so as to quickly and preliminarily evaluate the field stability; and then according to an evaluation result, selecting a dangerous site in a targeted manner for detailed exploration. Compared with the prior art, the method has the advantages that the working period of exploration and evaluation can be shortened, the types and processes of parameter testing are reduced, the economic cost is reduced, and the method has remarkable applicability advantage for exploration and evaluation of tillite soil in marine glacier areas with high alpine regions, high altitudes and severe topographic conditions in the southeast of Tibetan Province.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, in particular to a method for quickly estimating physical and mechanical parameters of moraine soil. Background technique [0002] Affected by the warm and humid air currents of the Indian Ocean, the Palong Zangbo River Basin in Nyingchi City in southeast Tibet has developed a marine glacial area, and the active advance and retreat of glaciers has created a large number of large-scale thick moraines. [0003] As a discontinuous engineering medium of mixed accumulation, moraine is not only the geological carrier of most landslides in southeast Tibet, but also the main material source of the disaster chain of glacier debris flow and glacial lake outburst, which is prone to deformation and instability under hydrodynamic conditions Geological disasters such as landslides, mudslides, and ground subsidence are formed. In the context of accelerating the planning and construction of the...

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Problems solved by technology

[0007] The purpose of the present invention is to solve the above-mentioned defects in the prior art, provide a method for quickly estimating the physical and mechanical parameters of moraine soil and its application, and aim to solve the problem that the research on the physical and mechanical parameters of moraine soil in the marine glacier area is not sufficient, Effective empirical data relationship has not yet been formed, and each site needs to carry out special research independently, which can save the construction period of exploration and evaluation, reduce the types and procedures of parameter testing, and reduce economic costs

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