Multifunctional soil body permeability and pollutant interception capacity testing device

A technology of sewage interception ability and test device, which is applied in the direction of measurement device, permeability/surface area analysis, suspension and porous material analysis, etc. It can solve the problems of less consideration of physical and mechanical factors, and achieve good integrated performance and effective Extensive, lightweight effects

Active Publication Date: 2020-09-11
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on the mechanism of pollutant migration in bentonite layer under seawater erosion mostly focuses on factors such as ion concentration, solution composition, and aging of colloidal particles, while less consideration is given to physical and mechanical factors.

Method used

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  • Multifunctional soil body permeability and pollutant interception capacity testing device
  • Multifunctional soil body permeability and pollutant interception capacity testing device
  • Multifunctional soil body permeability and pollutant interception capacity testing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] In this example, see Figure 1-Figure 5 , a multifunctional soil penetration and pollution interception test device, comprising a base 2, a reaction frame, a chamber 3, a piston 10, a pressure measurement and control system, and a concentration monitoring system;

[0050] The counter force frame comprises a cross bar 1, a screw 4, a nut 8 and a connecting rod 6; the base 2 is provided with a screw slot 9, and the lower end of the screw 4 is inserted into the screw slot 9 of the base 2 and fixed so that at least two screws 4 The bottom is installed on the base 2, the upper end of the screw rod 4 is inserted into the bolt hole on the cross bar 1, and the height of the cross bar 1 is changed by adjusting the nut 8 to form a reaction force frame structure;

[0051] The chamber 3 is installed in the reaction force frame between the base 2, the cross bar 1 and the screw rod 4, and the lower part of the chamber is inserted into the chamber slot 14 of the corresponding shape on...

Embodiment 2

[0056] This embodiment is basically the same as Embodiment 1, especially in that:

[0057] In this example, see Figure 1-Figure 5 , through the lifting height of the bottom of the piston 10 on the left and right sides, the liquid level height in the liquid pressurized piston chamber on the left and right sides is controlled, and then the different water-soil contact areas that permeate through the permeable stone slab 13 are controlled to simulate the vertical direction of the soil sample. The experimental conditions of the pollutant migration and the cut-off of pollutants under the experimental conditions of different water-soil contact areas, water head differences and two-way pressure test conditions of the curtain.

[0058] In this embodiment, the pressurized system includes a pressurized gas source 22 communicated therewith, a water pressure controller 11 and a glass tube 18, and the two ends of the glass tube 18 are connected to the water outlet of the water pressure co...

Embodiment 3

[0067] This embodiment is basically the same as the previous embodiment, and the special features are:

[0068] In this example, the type of salt solution on both sides of the soil, the head difference, and the pressure direction are kept constant, and the water-soil contact area on both sides of the soil is changed to study the law and effect of the water-soil contact area on the migration of pollutants. The impact test of pollutant cut-off ability, the test steps are as follows:

[0069] Step 1: Install the base. First place the base 2 on the test platform, screw in two screws 4 and tighten them. Install the top cross bar 1 again, and adjust the nut 8 to reserve a certain height to vacate space for subsequent operations.

[0070] Step 2: Install the sample chamber. Insert the chamber 3 into the groove of the base 2, and adjust the O-shaped rubber ring 17 to ensure the seal. Apply sealing silicone grease to the O-ring before inserting to ensure a leak-proof seal. Insert ...

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Abstract

The invention discloses a multifunctional soil body permeability and pollutant interception capacity testing device which has the capabilities of controlling water head difference, water and soil contact area and pressure direction and measuring pollutant intercepting capacity of a soil body and is used for researching anti-seepage characteristics and pollutant intercepting characteristics of a vertical anti-seepage curtain of a landfill. The testing device is composed of a cavity, a concentration monitoring system, a pressurization system, a piston, a reaction frame and a base. By controllingthe piston, the pollutant transport law of the vertical curtain such as clay-bentonite under different water and soil contact areas, water head differences and bidirectional pressure conditions can be simulated, the pollutant interception capacity of the vertical curtain is evaluated, and permeability and pollutant interception performance indexes of different positions of the isolation wall areobtained. The device is simple and convenient in design, diverse in function and high in integrity, and can be used for testing the permeability and the sewage interception capacity of the vertical anti-seepage curtain soil body.

Description

technical field [0001] The invention relates to a test device for testing the penetration and pollutant interception capacity of multifunctional soil, which relates to a test device capable of controlling water head difference, water-soil contact area, pressure direction and soil interception capacity for pollutants, belonging to environmental geotechnical engineering measurement Instrument manufacturing technology and testing field. Background technique [0002] Restricted by factors such as economy, transportation, and geographical conditions, most of the garbage landfills in coastal cities are built in coastal tidal flats. The anti-seepage system of landfill is the key measure to block the leakage of landfill leachate. Bentonite is widely used as an anti-seepage barrier material in anti-seepage systems because of its low permeability and high adsorption. The groundwater level of tidal flat landfill is high, and seawater is mixed in the coastal area. The bentonite anti-s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08G01N13/04
CPCG01N15/0806G01N15/0826G01N13/04
Inventor 孙文静徐刚李明玉谈云志
Owner SHANGHAI UNIV
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