On-site undisturbed soil block sampling device easy to transport and small in disturbance and sampling method of on-site undisturbed soil block sampling device

A sampling device and undisturbed technology, applied in the direction of sampling devices, etc., can solve the problems of easily destroying the original structure of undisturbed soil clods, difficult to ensure undisturbed soil clods in experiments, and close to the original state of soil, so as to be convenient for researchers and experimenters to use , large sample and good integrity

Pending Publication Date: 2022-04-29
LOGISTICAL ENGINEERING UNIVERSITY OF PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, plastic bag wrapping is the most commonly used treatment method for sealing and wrapping the undisturbed soil clods. However, the biggest problem with this method is that it is easy to disturb the soil samples during sealing treatment, and the original structure of the undisturbed soil clods is easily damaged by wrapping. Similarly, it is easy to damage the undisturbed soil block during transportation, so it is difficult to ensure that the undisturbed soil block in the experiment is as close to the original state of the soil as possible

Method used

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  • On-site undisturbed soil block sampling device easy to transport and small in disturbance and sampling method of on-site undisturbed soil block sampling device
  • On-site undisturbed soil block sampling device easy to transport and small in disturbance and sampling method of on-site undisturbed soil block sampling device
  • On-site undisturbed soil block sampling device easy to transport and small in disturbance and sampling method of on-site undisturbed soil block sampling device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: see Figure 1-5 , an on-site undisturbed soil clod sampling device that is easy to transport and has little disturbance, includes a dowel bar 1, a box cover 2, a box shoe 7, a soil cutting board 9, a sealing board 11 and three box boards 5.

[0036] The dowel 1 is located at the center of the top of the case cover 2, the center of the top of the case cover 2 is the center of the top of the entire sampling device, the dowel 1 is fixedly connected with the case cover 2, so that the axial static load can be guaranteed The pressure is evenly transmitted to the box cover 2 to ensure that the box body plate 5 moves in the vertical direction. The edge positions of the three sides of the bottom of the box cover 2 are provided with mortises, and the mortises are arranged along the length direction of the sides. The tops of the three box panels 5 all have mortises, and the mortises and the mortises are slidingly fitted. During specific implementation, In order to m...

Embodiment 2

[0049] Example 2: see Figure 7 , an on-site undisturbed soil clod sampling method that is easy to transport and has little disturbance, is carried out using the on-site undisturbed soil clod sampling device described in Example 1, according to the triaxial test in the latest national standard "Standards for Geotechnical Test Methods" (GB / T 501232019) To the requirement of sample size, the specification size of sampling device described in embodiment 1 is: length 400mm * width 300mm * height 100mm, forms the undisturbed soil block sampling cavity, and this sampling method comprises the following steps:

[0050] S101: Determine the sampling area and make corresponding marks; specifically, determine the sampling area according to the geotechnical test requirements or geological survey results and make a sampling mark. The above warning signs are used to position and protect the sampling area to avoid damage. Sampling areas are generally open or semi-open areas during engineerin...

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Abstract

The invention discloses an on-site undisturbed soil block sampling device easy to transport and small in disturbance and a sampling method thereof, the sampling device is a totally-closed box body which is composed of a box cover, three box body plates, a soil cutting plate and a sealing plate and is provided with a cavity, a wrapping film is arranged in the totally-closed box body, and a dowel bar is arranged in the center of the top of the box cover. The sampling method comprises the following steps: determining a sampling area and making a corresponding mark; the sampling area is excavated and leveled, a sampling operation space and environment are formed, the sampling depth is determined, and the thickness of an undisturbed soil block sampling protection layer is reserved; an isolation groove is excavated around the sampling area, and the sampling area is separated from the surrounding soil body; a sampling device is adopted for sampling, the sampling device completing sampling is conveyed to an indoor laboratory, and the undisturbed soil blocks are taken out. A wrapping film and a sealing plate are arranged in the sampling device, so that evaporation of moisture in the original soil blocks during sampling, transportation and storage is relieved, and the original state sealing performance of the sampling device on the undisturbed soil blocks is enhanced.

Description

technical field [0001] The invention belongs to a soil sampling method for a geotechnical test, in particular to an on-site undisturbed soil block sampling device and a sampling method thereof which are easy to transport and have little disturbance. Background technique [0002] With the continuous popularization and application of theoretical research and engineering practice of soil materials, their complex engineering mechanical properties have attracted everyone's attention. Over the past century, a large amount of research foundation and research experience have been accumulated in soil mechanics research, and the complex micro- and meso-structural characteristics of soil have been clarified, which has laid a solid foundation for the study of soil mechanical properties. Generally speaking, researchers and professional technicians in the field of civil engineering mainly study the mechanical properties of soil through experimental research and numerical analysis. However...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/08
CPCG01N1/08
Inventor 穆锐陈金锋姚未来雷屹欣任俊儒张天宇何小涌张蕾
Owner LOGISTICAL ENGINEERING UNIVERSITY OF PLA
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