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Dynamic/static coupled test method for testing physical and mechanical properties of rock-soil body

A technology of dynamic and static coupling and mechanical characteristics, applied in soil material testing, strength characteristics, measuring devices, etc., can solve problems such as limited conclusions and limited depth of rock and soil interpretation, and achieve the effect of expanding the test range

Inactive Publication Date: 2018-08-24
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current static test and dynamic test are carried out separately, and the comparative research on static and dynamic aspects mainly focuses on the direct comparative analysis of static test results and dynamic test results, and since dynamic test and static test are carried out separately Yes, the conclusions drawn after the comparison are often limited, and the depth of interpretation for the deformation and instability of rock and soil mass is limited.

Method used

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  • Dynamic/static coupled test method for testing physical and mechanical properties of rock-soil body
  • Dynamic/static coupled test method for testing physical and mechanical properties of rock-soil body
  • Dynamic/static coupled test method for testing physical and mechanical properties of rock-soil body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Dynamic and static coupling test method:

[0014] 1. Sample preparation. Cut undisturbed rock and soil samples of different sizes or prefabricate samples of a certain size through molds according to the needs of the test. Prefabricated samples with a diameter of 39.1 mm and a height of 80 mm or a sample with a diameter of 50 mm and a height of 100 mm can be subjected to a triaxial test after pre-shocking. In the triaxial test, the ratio of height to diameter should be controlled at 2.0 to 2.5. The prefabricated diameter is 79.8mm (61.8mm), and the height is 20mm. After the pre-shock, the consolidation test and direct shear test can be carried out. It can also be prefabricated into a sample with a diameter of 61.8mm and a height of 40mm. After the pre-shock, the permeability test can be carried out to study the change of the permeability coefficient of the soil sample after the pre-shock.

[0015] 2. Sample loading. Install the cut rock and soil sample on the dynamic ...

Embodiment 2

[0022] The following examples are all controlled reference tests, and the test results show that the method of Example 1 is completely correct and more accurate.

[0023] Dynamic and static coupling test - static triaxial test

[0024] 1. Sample preparation. According to the needs of the test, prefabricate samples with a diameter of 39.1mm and a height of 80mm or a diameter of 50mm and a height of 100mm with a soil cutter, and control the height-to-diameter ratio of 2.0 to 2.5 in the triaxial test.

[0025] 2. Sample loading. Install the cut rock and soil sample on the dynamic triaxial instrument, select a suitable sample base according to the size of the sample, and after installing the base, install the sample on the base of the corresponding size. At this time, be sure to ensure that the rubber For the tightness of the membrane, water is not allowed to enter the sample during the pre-vibration test.

[0026] 3. Consolidation. Consolidate the sample before applying the d...

Embodiment 3

[0030] Dynamic and Static Coupling Test-Dynamic Triaxial Test

[0031] 1. Sample preparation. According to the needs of the test, prefabricate a sample with a diameter of 39.1mm and a height of 80mm or a diameter of 50mm and a height of 100mm with a soil cutter. In the triaxial test, the height-to-diameter ratio can be controlled at 2.0-2.5.

[0032] 2. Sample loading. Install the cut rock and soil sample on the dynamic triaxial instrument, select the appropriate sample base according to the size of the sample, and install the sample on the base of the corresponding size after installing the base. At this time, be sure to ensure that the rubber For the tightness of the membrane, water is not allowed to enter the sample during the pre-vibration test.

[0033]3. Consolidation. Consolidate the sample before applying the dynamic load. During the consolidation process, calculate the overlying pressure and confining pressure of the soil sample in nature according to the burial de...

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Abstract

The invention aims to provide a technical method for testing physical and mechanical properties of rock-soil body in a dynamic / static coupled manner. The method can acquire the physical and mechanicalproperties of the rock-soil body after the rock-soil body is firstly subjected to earthquake load or mechanical vibration load and then is subjected to water induction or other static force load. Themethod provides a new theory for stability loss of the rock-soil body due to rainfall after earthquake or other external factors. In the method, a dynamic triaxial device and the like test equipmentis used for pre-applying an earthquake load or mechanical vibration load to a rock-soil body test sample; after the dynamic load works, the test sample, which is subjected to the dynamic load, is subjected to static characteristic test, water-physical property test and dynamic characteristic test of rock-soil body, etc.; if the dynamic characteristic test needs to carry out in later period, the rock-soil body test sample can be directly subjected to tests of dynamic strength, dynamic modulus and earthquake subsidence and the like after pre-vibration according to soil engineering test specification without removal of the test sample.

Description

technical field [0001] The invention relates to the technical field of testing the physical properties of rock and soil, in particular to a dynamic-static coupling test method for testing the physical and mechanical properties of rock and soil. Background technique [0002] In geotechnical engineering investigation, the physical, mechanical and chemical properties of rock and soil play a vital role in the design and construction of geotechnical engineering. At present, the physical and mechanical properties testing methods of rock and soil include on-site testing methods and indoor testing methods. The on-site testing mainly uses some on-site monitoring instruments or on-site testing equipment to directly test the physical and mechanical properties. Indoor testing methods include physical property testing, static characteristic testing and dynamic characteristic testing, etc. The physical property test mainly obtains the basic physical properties of the rock and soil throug...

Claims

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Application Information

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IPC IPC(8): G01N3/00G01N33/24
CPCG01N3/00G01N33/24
Inventor 谌文武刘伟王娟孙冠平
Owner LANZHOU UNIVERSITY
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