Large-scale in-situ triaxial shear test device and method thereof

A technology of triaxial shearing and testing device, which is used in large-scale in-situ triaxial shearing testing device, the determination of mechanical parameters of in-situ soil samples under the condition of applied confining pressure, and the testing of soil mechanical properties. It reflects the shear strength performance of soil and cannot fully represent the mechanical properties, etc., and achieves the effect of reliable test data.

Pending Publication Date: 2017-12-08
INST OF GEOMECHANICS
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AI Technical Summary

Problems solved by technology

[0003] 1. The large-scale indoor triaxial shear test device can only perform soil remodeling sample mechanical tests, which cannot fully represent the mechanical properties of the original structure characteristics of the coarse-grained soil at the engineering site;
[000

Method used

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  • Large-scale in-situ triaxial shear test device and method thereof
  • Large-scale in-situ triaxial shear test device and method thereof
  • Large-scale in-situ triaxial shear test device and method thereof

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Example Embodiment

[0041] Describe in detail below in conjunction with accompanying drawing and embodiment:

[0042] 1. Device

[0043] 1. Overall

[0044] like Figure 1-4 , the device includes a sample 10, a confining pressure system 20, a vertical pressure system 30, a reaction force system 40 and an automatic data acquisition system 50;

[0045] A sample 10 is arranged in the confining pressure system 20 , a vertical pressure system 30 and a reaction force system 40 are respectively arranged above and below the confining pressure system 20 , and the vertical displacement meter of the automatic data acquisition system 50 is arranged in the sample 10 .

[0046] 2. Functional components

[0047] 1) Sample 10

[0048] Sample 10 is an undisturbed and representative in-situ soil selected in the excavated exploration pit, prepared into a cylinder with a diameter:height=1:2, generally 300×600mm or 200×400mm.

[0049] 2) Confining pressure system 20

[0050] like figure 1 , 2 , 3, 4, the con...

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Abstract

The invention discloses a large-scale in-situ triaxial shearing test device and a method thereof, which belong to the technique of testing mechanical properties of soil in the field of geotechnical engineering. The device includes a sample (10), a confining pressure system (20), a vertical pressure system (30), a reaction force system (40) and an automatic data acquisition system (50); For the sample (10), the vertical pressure system (30) and the reaction force system (40) are respectively set above and below the confining pressure system (20), and the vertical displacement meter of the automatic data acquisition system (50) is set on the sample ( 10) Inside. Compared with the prior art, the present invention can maintain the original structure of the sample; can apply confining pressure to the sample to reproduce the in-situ stress field of the measured soil; can destroy the soil along its weakest surface; the sample size is large , to reduce the size effect. The invention has the characteristics of being true and comprehensive in studying the shear strength of the soil, and the test data is reliable, which can provide a strong guarantee for the design and construction in the field of geotechnical engineering.

Description

technical field [0001] The invention belongs to the testing technology of mechanical properties of soil in the field of geotechnical engineering, and in particular relates to a large-scale in-situ triaxial shear test device and its method, and is especially suitable for measuring the mechanical parameters of in-situ soil samples under confining pressure . Background technique [0002] In order to obtain the shear strength index of coarse-grained soil, many universities and research institutes at home and abroad are committed to researching large-scale test equipment, such as large-scale indoor triaxial shear test equipment, large-scale indoor (in situ) direct shear test equipment, etc., although It has achieved fruitful results and provided a guarantee for the understanding and research of coarse-grained soils, but there are still the following deficiencies: [0003] 1. The large-scale indoor triaxial shear test device can only perform soil remodeling sample mechanical test...

Claims

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Application Information

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IPC IPC(8): G01N3/24
CPCG01N3/24G01N2203/0025G01N2203/0048G01N2203/0256G01N2203/0266
Inventor 郭长宝王献礼张永双杨志华吴瑞安任三绍
Owner INST OF GEOMECHANICS
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