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Apparatus and method for measuring saturated and unsaturated strength of contaminated soil

A technology of saturation strength and measuring device, which is applied in the direction of measuring device, strength characteristics, and the use of stable tension/pressure to test the strength of materials, etc., to achieve the effects of convenient use, high precision, and accurate water exchange

Active Publication Date: 2021-06-15
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a device and method for measuring saturated and unsaturated strength parameters of contaminated soil, so as to solve the problem of contaminated soil under multi-factor coupling conditions that cannot be realized by traditional test devices. Monitoring of the change process of body strength parameters, and real-time monitoring of the evolution law of deformation parameters of polluted soil

Method used

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  • Apparatus and method for measuring saturated and unsaturated strength of contaminated soil
  • Apparatus and method for measuring saturated and unsaturated strength of contaminated soil
  • Apparatus and method for measuring saturated and unsaturated strength of contaminated soil

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Embodiment 1

[0038] Such as Figure 1-Figure 3 As shown, Embodiment 1 of the present invention provides a device for measuring saturated and unsaturated strength of contaminated soil, including a sample column 1 , a gas phase suction control module 2 , a membrane suction control module 3 and a loading module 4 . Wherein the sample column 1 is a cylindrical structure, the sample soil body 5 is arranged in the sample column, and a permeable stone 6 is arranged at the top and bottom of the sample column 1, the permeable stone 6 can pass through the solution, and prevent the soil Particles pass through.

[0039] During the test, the sample column 1 is vertically installed on a support structure, the support structure includes a base 7 arranged on the ground, and a plurality of vertical studs 8 are fixedly installed on the base 7, and a disc-shaped stud 8 is arranged on the stud 8. The piston 9, the stud 8 passes through the corresponding installation through hole opened on the piston 9, the b...

Embodiment 2

[0049] Embodiment 2 of the present invention provides a kind of method for measuring saturation strength of contaminated soil, comprising:

[0050] Step 1, assemble the device, put the sample soil sample 5, permeable stone 6, etc. into the sample column 1, use the clamping member 29 and the sealing strip 30 to tighten the sample column 1 and seal the interface to ensure the sealing of the test device sex. Install the sample column 1 upright on the support structure, and tighten the nut 10 so that the base 7 and the piston 9 clamp and fix the sample column 1 . Finally, the gas-phase suction control module 2 and the membrane suction control module 3 are installed (the PEG film 21 is not installed), and the first air pipe 13 is communicated with the top of the sample column 1 at the same time, and the second air pipe 14 connects the top of the sample column 1 with the top of the sample column 1. The bottom end is connected, the first liquid pipe 15 is connected with the bottom e...

Embodiment 3

[0055] Embodiment 3 of the present invention provides a method for measuring the unsaturated strength of polluted soil, wherein the gas phase method is used to control the suction of the sample soil, and the unsaturated strength is measured, which specifically includes:

[0056] Step 1 is device assembly, which is the same as Step 1 in Example 2.

[0057] Step 2 includes the process of suction control by the gas phase method, specifically: turn on the gas source 17, the air pump 18 and the peristaltic pump 20, the chemical solution bottle is filled with saturated saline solution, turn on the switches A-E, and adjust the connectivity between the sample soil 5 and the gas , let the migration and exchange of water be completed by steam, make the sample soil 5 in the natural state, simulate the suction change process of the polluted soil under the unsaturated state, and when the sample reaches the suction balance, based on the Kelvin formula (where p is the actual vapor pressure,...

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Abstract

The invention provides a device for measuring saturated and unsaturated strength of polluted soil, which includes a sample column, a gas phase suction control module, a membrane suction control module and a loading module. There is a permeable stone, and the sample column is set on a support structure, which is clamped and fixed by the support structure. The gas phase suction control module controls the suction of the sample soil through the gas phase method, and the membrane suction control module controls the sample soil through a semi-permeable membrane. Suction, the loading module can apply pressure to the sample column. The invention realizes the height reduction of the actual polluted site, the effective control of the suction force and the measurement and recording of the whole process of the saturated / unsaturated strength parameters and deformation characteristics of the polluted soil, and is used in the experimental research of the polluted soil strength in the industrial polluted site It has great application value.

Description

technical field [0001] The invention relates to the technical fields of geological engineering and geotechnical engineering, in particular to a device and method for measuring saturated / unsaturated strength parameters based on polluted soil. Background technique [0002] In recent years, with the expansion of my country's urban construction and the adjustment of industrial layout, high-polluting and high-energy-consuming enterprises in urban centers, such as machinery manufacturing, chemical smelting, and non-ferrous mining, have all implemented corporate relocation. Due to the outdated equipment and industrial emissions of these enterprises Imperfect technology has led to a large amount of heavy metals and other pollutants entering the groundwater and soil, seriously affecting the surrounding ecological environment, and posing a serious threat to human health and sustainable social development. Therefore, how to treat and control heavy metal-contaminated soil economically an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/12
CPCG01N3/12G01N2203/0019G01N2203/0044
Inventor 贺勇蒋文强张可能李建中陈科平张闯朱考飞
Owner CENT SOUTH UNIV
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