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Probe testing device and method for strength and structure testing of hard soil

A technology of structural testing and testing equipment, which is applied in the direction of measuring equipment, strength characteristics, and the use of stable tension/pressure testing material strength, etc., can solve the problems of lack of equipment and methods, and achieve detailed and reliable data, convenient disassembly and assembly, and identification Intuitive effect of image

Inactive Publication Date: 2017-10-20
CHINA UNIV OF MINING & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, geophysical prospecting, drilling, trenching, and caving are generally used to test macroscopic rock-soil formation interfaces and structural parameters, and scanning electron microscopy, mercury intrusion tests, and CT scans are generally used to test microscopic, micro- or nanoscale pores. There is still a lack of effective devices and methods for testing the structural characteristics between the microscopic and macroscopic in the test block sample

Method used

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  • Probe testing device and method for strength and structure testing of hard soil
  • Probe testing device and method for strength and structure testing of hard soil
  • Probe testing device and method for strength and structure testing of hard soil

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Embodiment 1

[0064] Embodiment 1: The sample is taken from the K-10 borehole of a mine in Yuzhou City, Henan Province. The sampling depth is 110.2m. It is sandy clay in the middle of the Neogene system, and the uniaxial compressive strength is close to 1MPa. When preparing the sample, flatten the upper and lower surfaces of the undisturbed soil with a soil cutter and install it on the triaxial sample preparation device, and unload the soil sample when it is cut to a diameter close to 50mm with a soil cutter. The ring knife 15 is pressed into the ring knife 15 while cutting the soil sample with the soil cutter, and the top is reserved 2 mm to install the sample protection cap 9, and 10 two hard soil samples are prepared, and put into a curing bottle for use.

[0065]The test uses a probe 7 with a diameter of 1.1 mm and a length of 80 mm, a sample protection cap 8 with an outer diameter of 50 mm, a probe hole 14 with a diameter of 1.2 mm, and a distance between the probe holes 14 of 10 mm. Th...

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Abstract

The invention provides a probe testing device and method which are applicable to strength and structure testing of super-solidified and heterogeneous soil. The probe testing device comprises a probe fixing frame, a tension-compression stress sensor, a displacement meter, a probe and a laterally constrained columnar hard soil specimen provided with a specimen protective cap above; test conditions of penetration resistance distribution on multiple penetration traces of an axis of the columnar specimen are provided. Penetration resistance distribution on multiple penetration trances and hard soil weak zone division on each single penetration trace are obtained through repeated tests through probes with different diameters, accordingly, the spatial three-dimensional morphology of weak zones is obtained, hard soil strength features are calculated and analyzed according to spatial distribution data of the penetration resistance of the hard soil, the structure of an existing press machine remains unchanged, the testing device is convenient to disassemble and assemble and simple in structure, and acquired data are detailed and reliable; the probe testing device can adapt to multiple size tests and various kinds of hard soil by adjusting the dimension of the probe, the size of a ring knife and the size of the specimen protective cap and has wide adaptability.

Description

technical field [0001] The invention relates to a probe test device and method, especially suitable for the probe test device and method of hard soil strength and structure tests used in the strength and structure tests of super-consolidated and heterogeneous soils. Background technique [0002] The strength of hard soil is between rock and soil. Due to the insufficient loading capacity of conventional soil mechanics test equipment, it is powerless for hard soil. Conventional rock mechanics test equipment will significantly damage hard soil at the initial stage of loading, which is not conducive to capturing the mechanical process of deformation and failure of hard soil. . At the same time, the inner sliding surface, cracks and holes are developed in the hard soil, and the structural influence on its properties is also very prominent. At present, geophysical prospecting, drilling, trenching, and caving are generally used to test macroscopic rock-soil formation interfaces an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08G01N3/02G01N3/06
CPCG01N3/02G01N3/06G01N3/08G01N2203/0019G01N2203/06
Inventor 董青红刘菠
Owner CHINA UNIV OF MINING & TECH
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