Sampling method of large-diameter granular material undisturbed sample

A particulate matter, large-diameter technology, applied in the field of foundation soil survey, construction, infrastructure engineering, etc., to avoid disturbance damage, rapid sampling, and simple operation.

Pending Publication Date: 2019-05-07
CHONGQING JIAOTONG UNIVERSITY
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  • Sampling method of large-diameter granular material undisturbed sample
  • Sampling method of large-diameter granular material undisturbed sample
  • Sampling method of large-diameter granular material undisturbed sample

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[0026] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0027] like figure 1 As shown, the sampling method of the large-diameter particulate matter provided by the embodiment of the present invention includes the following steps:

[0028] S101: Remove the rock and earth material of the cover layer above the protective layer (according to the situation of the cover layer, take corresponding buffer measures during the process);

[0029] S102: After removing the protective layer, quickly cut out the required columnar rock core samples according to the purpose of the experiment. Be very careful during the production process to avoid disturbing the sample, so as to maintain the ori...

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Abstract

The invention belongs to the technical field of sampling devices, disclosing a sampling method of a large-diameter granular material undisturbed sample, removing cover rock and soil materials above aprotective layer. After the protective layer is removed, cutting a required columnar rock-soil core sample; after the sample is prepared, the top part and the side surface of the sample are quickly sealed by wax liquid, then the prepared heat-shrinkable or cold-shrinkable reinforcing sleeve is sleeved, and the reinforcing sleeve is shrunk by a corresponding hot air gun or cold air gun to fix the sample, then the root part of the sample is cut to be separated from the parent body; and then reversing, flattening, pouring wax liquid for sealing, using a hot air gun or a cold air gun to shrink thereserved reinforcing sleeve so as to ensure that the sample is completely sealed and closed, then using a fixing device to fix the sample, and finally sleeving damping foam. The method avoids the difficulty of obtaining the mechanical strength parameters of the large-diameter coarse-particle rock-soil body through complex in-situ tests, overcomes the defect of disturbance and damage to the structure of the rock-soil body in the sampling process, and is worthy of popularization and application.

Description

technical field [0001] The invention belongs to the technical field of sampling devices, in particular to a sampling method for large-diameter particulate matter in its original state. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: [0003] The weak zone in rock mass is a geological phenomenon often encountered in rock mass engineering, and its existence often brings adverse effects to engineering. Therefore, the research on the mechanical strength parameters of the weak zone has become the key research content in rock mass engineering. The weak zone is in a complex geological environment, and its engineering characteristics are the result of the joint action of material foundation and environmental conditions. The material basis of the weak zone mainly refers to grain composition, mineral composition and chemical composition. Environmental conditions mainly include ground stress, groundwater and ground te...

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Application Information

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IPC IPC(8): E02D1/04
Inventor 唐良琴聂德新魏玉峰
Owner CHONGQING JIAOTONG UNIVERSITY
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