Determination method for collapsible soil, soluble collapsible soil or composite soil

Abstract

The invention discloses a method for judging collapsible soil, soluble collapsible soil or composite soil. The method comprises the following steps: 1, sampling, and preparing a cutting ring undisturbed soil sample; 2, performing a soaking consolidation test on the first cutting ring undisturbed soil sample; 3, removing soluble salt in the second cutting ring undisturbed soil sample; 4, carrying out a saturated water consolidation test on the salt-free second cutting ring undisturbed soil sample; and 5, judging that the soil sample is collapsible soil, soluble collapsible soil or composite soil. The method disclosed by the invention is simple in steps, soluble salt in the second cutting ring undisturbed soil sample is firstly removed to obtain the salt-free second cutting ring undisturbed soil sample, then the first cutting ring undisturbed soil sample and the salt-free second cutting ring undisturbed soil sample are subjected to consolidation test to obtain the additional settlement of the first cutting ring undisturbed soil sample and the additional settlement of the salt-free second cutting ring undisturbed soil sample, and finally, the to-be-judged soil layer is judged to be collapsible soil, soluble collapsible soil or composite soil, so that the method is convenient to popularize and use.

Description

technical field [0001] The invention belongs to the technical field of soil layer characteristics research, in particular to a method for judging collapsible soil, dissolving soil or composite soil. Background technique [0002] At present, with the continuous development of the construction industry, it is necessary to determine the mechanical properties of the undisturbed soil at the beginning of the project. There are large areas of saline soil in many areas in my country and abroad, and the problems of saline soil dissolution, salt expansion and corrosion Engineering geological characteristics have brought great harm to engineering construction, and engineering disposal of saline soil has become an urgent problem to be solved in engineering construction. In addition, the saline soil in arid and semi-desertized areas at home and abroad has not only the characteristics of collapsibility, but also the characteristics of collapsibility. Therefore, before construction, it must...

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Problems solved by technology

In addition, the saline soil in arid and semi-desertized areas at home and abroad has not only the characteristics of collapsibility, but also the characteristics of collapsibility. Therefore, before construction, it must be determined that the saline soil on the construction site is collapsible soil. , collapsible soil or composite soil mixed with collapsible soil and collapsible soil, and then select the appropriate saline soil treatment method according to the nature of the saline soil to ensure the quality of the project; currently, there are saline soil areas in China and different versions of international building technical codes for saline soil areas. However, the method for obtaining the subsidence coefficient in this technical code is basically the same as that of the collapsibility test. Methods to determine whether saline soil is collapsible soil, dissolved soil or composite soil

[0003] Therefore, there is a need for a method for judging collapsible soil, collapsible soil or composite soil with simple steps and reasonable design, so as to solve the problem that the existing technology cannot determine whether the soil layer is collapsible soil or collapsible soil. or composite soil

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