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Measurement apparatus for swelling force change of buffer backfill material along with water absorption change, and measurement method thereof

A measuring device and a technology for water absorption, which are applied in the direction of measuring devices, force/torque/work measuring instruments, analytical materials, etc., and can solve the problems of measuring devices and measuring methods that do not disclose the relationship between the expansion force of buffer backfill materials and the water absorption , to achieve the effect of simple and convenient operation and low cost

Inactive Publication Date: 2012-10-17
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]The buffer and backfill material will expand when it encounters groundwater, and the expanded buffer and backfill material cannot play the above four aspects well
However, in the prior art, there is no disclosed measuring device and measuring method for the relationship between the expansion force of buffer backfill material and the variation of water absorption.

Method used

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  • Measurement apparatus for swelling force change of buffer backfill material along with water absorption change, and measurement method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Use the ring cutter 4 to cut the buffer backfill material sample 5, connect the earth pressure sensor 6 and the strain gauge 9 with the wire 10, put the earth pressure sensor 6 into the cavity under the upper permeable stone 3, and clamp it with the upper and lower permeable stones 3 The ring knife 4 with the buffer backfill material sample 5, the upper and lower permeable stones 3 completely cover the upper and lower ring surfaces of the ring knife 4, the upper and lower permeable stones 3 are clamped by the clamp 2, and the clamp 2 is put into the closed container 1 , the jig 2 can be in contact with the bottom of the closed container 1, or can be hung in the closed container 1. One end of the conduit 8 is connected to the measuring cylinder 7, and the other end leads into the closed container 1, and the measuring cylinder 7 is filled with water. Inject water into the closed container 1 through the measuring cylinder 7 until the buffer backfill material is completel...

Embodiment 2

[0021] A method for measuring the relationship between expansion force of cushioning backfill material and water absorption, the measurement steps are:

[0022] (1) Place the earth pressure sensor 6 in the cavity in the middle of the upper permeable stone 3, and connect it to the strain gauge 9 with the wire 10, cut the buffer backfill material sample 5 with the ring knife 4, and place it on the buffer backfill material sample 5. , Place the upper and lower permeable stones 3 below, and use the clamp 2 to clamp the buffer backfill material sample 5 through the upper and lower permeable stones 3;

[0023] (2) Put the clamp 2 holding the buffer backfill material sample 5 into the container 1, and close the container 1;

[0024] (3) Add the water in the measuring cylinder 7 into the closed container 1 through the conduit 8, and turn on the strain gauge 9;

[0025] (4) When the sample 5 is completely submerged, start to record the display value of the expansion stress o...

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Abstract

In an engineered barrier system for deep geological disposal of high level radioactive waste, a buffer backfill material is adopted as the most important encapsulation facility for preventing radionuclide from migration to a groundwater environment. The present invention relates to a measurement apparatus for swelling force change of a buffer backfill material along with water absorption change, and a measurement method thereof. According to the present invention, the periphery of a buffer backfill material sample is enclosed with a ring knife; upper water penetrating stone and lower water penetrating stone are respectively placed above the buffer backfill material sample and below the buffer backfill material sample; a recess is arranged on the middle position of the lower part of the upper water penetrating stone; a soil pressure sensor is arranged inside the recess; the buffer backfill material sample is clamped in a clamper with the upper water penetrating stone and the lower water penetrating stone; the clamper clamping the buffer backfill material sample is positioned in a closed container; the soil pressure sensor is communicated with a strain gage outside the closed container through a conducting wire; and a water loading volumetric cylinder having scale is arranged outside the closed container, and is communicated with the closed container through a duct.

Description

technical field [0001] In the engineering barrier system for deep geological disposal of high-level radioactive waste, the buffer backfill material is the most important encapsulation facility to block the migration of radionuclides to the groundwater environment. The invention relates to a measuring device and a measuring method for the relationship between the expansion force of the cushioning backfill material and the water absorption. Background technique [0002] In the "Journal of Rock Mechanics and Engineering", Volume 28, Issue 12, December 2009, a paper by Zhang Huyuan, Liang Jian, Liu Jisheng, and Cui Suli from the Key Laboratory of Western Disaster and Environmental Mechanics of the Ministry of Education of Lanzhou University was published - "Mixed Research on the Compaction Performance of Type Buffer and Backfill Materials”, the introduction of the article records: “In the engineering barrier system for deep geological disposal of high-level radioactive waste, th...

Claims

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Application Information

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IPC IPC(8): G01N33/00G01L5/00
Inventor 张虎元张明王锦芳周浪
Owner LANZHOU UNIVERSITY
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