Test device for determination of free expansion rate of swelling rock

A technology of free expansion rate and test device, which is used in the field of test devices for measuring the free expansion rate of expansive rocks, can solve the problems of suspension of operation, repair or repeated construction, hazards, etc., and achieve the effect of ensuring accuracy and stability.

Inactive Publication Date: 2018-05-08
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its special engineering properties, expansive rock will cause various hazards in mining, water conservancy, transportation and construction projects, which often lead to delays in the construction period, unqualified project quality and rework or repeated construction, suspension of operation, etc., resulting in increased project costs causing huge economic losses

Method used

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  • Test device for determination of free expansion rate of swelling rock

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Embodiment Construction

[0017] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0018] In one embodiment of the present invention, as figure 1 As shown, a test device for measuring the free expansion rate of expansive rock is provided, including: a water adding device, a water level controller 6 (model DZC201-T), a reaction device, a tester and a controller 14 connected in sequence.

[0019] The water adding device includes a water storage tank 1, a catheter 2, a peristaltic pump 3 and a peristaltic pump switch 4; one end of the catheter 2 is inserted into the water storage tank 1, and the other end is connected to the peristaltic pump 3 and extended into the reaction device; the peristaltic pump 3, The peristaltic pump switch 4 and the water level controller 6 are electrically connected. Oxygen-containing deionized water is stored in the water storage tank 1, and the catheter 2 is placed below the liquid level of th...

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Abstract

The present invention discloses a test device for determination of a free expansion rate of a swelling rock. The device comprises a water adding device, a water level controller, a reaction device, atester and a controller connected in order. The reaction device is a cuboid structure and is internally provided with two permeable separators, a rock sample is arranged between the two permeable separators, and a permeable stone is arranged below the rock sample; and the tester comprises an EC tester and a displacement tester. The test device is simple, can measure displacement changes of the rock sample in up, left, right, front and back directions, can measure an EC value of solution after reaction by employing a conductivity meter, can analyze the displacement change of the rock sample andthe change of the solution EC value to analyze the free expansion rate of the swelling rock and the failure mechanism of the water-swelling swelling rock.

Description

technical field [0001] The invention belongs to the technical field of expansive rock test and measurement equipment, and in particular relates to a test device for measuring the free expansion rate of expansive rock. Background technique [0002] Expansive rock and soil is a kind of rock and soil with significant expansion and contraction characteristics, which is multi-cracked, swells and softens when exposed to water, shrinks and cracks when it loses water. From the perspective of rock types, there are many types of rocks with water-absorbing swelling properties, such as mudstone, shale, Guotuyan, argillaceous siltstone, gypsum, and Glauber's salt. Its expansion characteristics are mostly affected by many factors, including the physical and mechanical properties of the rock, initial water content, water supply conditions and stress state, etc. According to the different expansion mechanisms, expansive rocks can be divided into chemical expansive rocks and clayey expansiv...

Claims

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Application Information

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IPC IPC(8): G01B21/32G01N27/06
CPCG01B21/32G01N27/06
Inventor 孙春卫巫锡勇关欢肖星光黄如玉李先于涛廖昕
Owner SOUTHWEST JIAOTONG UNIV
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