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Simulation test method for landslide hazard of soft soil layer under confining pressure condition

A technology for simulating tests and disasters, applied in the direction of testing material strength by applying stable tension/compression, testing material strength by applying stable shear force, measuring devices, etc., which can solve the real simulation test of soft soil landslide disasters that cannot be realized , The test process is cumbersome, the device structure is complicated, etc.

Active Publication Date: 2016-12-07
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing observation methods for the expansion process of soil shear bands have problems such as complex device structure, high test cost, cumbersome test process, poor operability, and poor use effect to varying degrees. The most important thing is that they cannot be simple, fast and accurate. Analyzing the soil microstructure of the shear zone, it is impossible to understand the influence of the soil microstructure on the macroscopic performance of the soil shear zone, and it is impossible to establish the relationship between the soil microstructure characteristics of the soil shear zone and its macroscopic performance. contact
Correspondingly, it is impossible to realize the real simulation test of landslide disaster in soft soil layer

Method used

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  • Simulation test method for landslide hazard of soft soil layer under confining pressure condition
  • Simulation test method for landslide hazard of soft soil layer under confining pressure condition
  • Simulation test method for landslide hazard of soft soil layer under confining pressure condition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] Such as figure 1 A soft soil layer landslide disaster simulation test method under the shown a kind of confining pressure state, comprises the following steps:

[0091] Step 1, sampling: adopt the sampling ring cutter to cut the tested soil sample 1 from the landslide to be tested, and record the soil sampling depth of the tested soil sample 1;

[0092] The tested soil sample 1 is cylindrical and its upper and lower surfaces are plane;

[0093] Step 2, landslide disaster simulation test: utilize the tested soil sample 1 taken in step 1 to carry out the landslide disaster simulation test of the landslide to be tested; The quantity of the surface to be tested in the described tested soil sample 1 is N, wherein N is Positive integer and N ≥ 3; When using the landslide hazard to be tested for the landslide to be tested by the tested soil sample 1 to carry out the simulation test, from top to bottom, use the N described surfaces to be tested of the tested soil sample 1 to c...

Embodiment 2

[0219] In this example, the difference from Example 1 is that the curing solution described in step 203 is uniformly composed of epoxy resin, acetone, ethylenediamine and dibutyl phthalate in a volume ratio of 100:170:6:2.2 mixed.

[0220] In this embodiment, the remaining method steps are the same as those in Embodiment 1.

Embodiment 3

[0222] In this example, the difference from Example 1 is that the curing solution described in step 203 is uniformly composed of epoxy resin, acetone, ethylenediamine and dibutyl phthalate in a volume ratio of 100:170:8:1.8 mixed.

[0223] In this embodiment, the remaining method steps are the same as those in Embodiment 1.

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Abstract

The invention discloses a simulation test method for landslide hazard of a soft soil layer under a confining pressure condition. The simulation test method comprises the following steps: firstly, sampling; secondly, carrying out a landslide hazard simulation test, comprising the following steps: 201, clamping a soil sample and a pressure device and adding water into the soil sample; 202, carrying out shear test; 203, dropping solidifying liquid; 204, slicing the bottom of the soil sample; 205, propping roof of the soil sample; 206, slicing the bottom of the soil sample; 207, taking out a soil body test sample in a shearing crack; 208, carrying out subsequent processing on the soil body test sample in the shearing crack; 209, carrying out electron microscope scanning; 210, carrying out the simulation test by utilizing the next to-be-tested surface; and 211, repeating the step 210 for N-2 times, so that a simulation test process is completed; and thirdly, sorting results of a shear simulation test. The simulation test method disclosed by the invention has the advantages that design is reasonable, operation is simple, using effect is good, shear strengths at different depths on a tested landslide and a microstructure at a shearing position can be simply and rapidly acquired, and an expansion process of a shear zone on the landslide under the confining pressure state can be really simulated.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and in particular relates to a simulation test method for landslide disasters in soft soil layers under confining pressure. Background technique [0002] In recent years, the transformation of the natural environment by human activities has become more and more intense. Human engineering activities have caused many geological disasters, which have caused great damage to people's lives and property. Among them, the slope instability induced by human activities is the most serious, and the focus of the study of slope instability is to study the deformation and expansion process of the soil shear zone. The shear zone refers to a strong deformation zone with shear strain developed in the lithosphere or soil mass, and the shear zone developed in the soil mass is a soil shear zone. This deformation zone can be a planar structure (fault) with strain discontinuity, or a ductile shear z...

Claims

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Application Information

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IPC IPC(8): G01N3/08G01N3/24G01N3/04G01N3/06
CPCG01N3/04G01N3/068G01N3/08G01N3/24G01N2203/0033G01N2203/0003G01N2203/0019G01N2203/0025G01N2203/04G01N2203/0641
Inventor 李晓军李洁梁
Owner XIAN UNIV OF SCI & TECH
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