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A Soft Rock Lateral Expansion Tester

A technology of expansibility and measuring instrument, which is applied in the field of indoor test, can solve the problems of measuring longitudinal expansion force, unable to obtain radial expansion force, short test time, etc.

Active Publication Date: 2020-11-06
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many measurement methods for expansion force, which can be generally summarized into four types: expansion pressurization method, constant volume method, stepwise loading expansion method and equilibrium pressurization method. Among these four methods, the constant volume method is more commonly used, because The constant volume method is more in line with engineering practice, and it is simple and the test time is short. However, the constant volume method can only measure the longitudinal expansion force, but cannot obtain the radial expansion force.

Method used

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  • A Soft Rock Lateral Expansion Tester
  • A Soft Rock Lateral Expansion Tester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The main structure of the soft rock expansibility tester involved in this embodiment includes a loading cap 1, a pressure bearing plate 2, a dynamometer 3, a pulley 4, a sample loading chamber 5, a water permeable plate 6, a sliding protection groove 7, a measuring ring 8, Dial indicator 9, pressure display instrument 10, filter paper 11, bearing base plate 12, fixed block 13; the two ends of the bearing base plate 12 of rectangular plate structure are connected with fixed fixed block 13; The sample chamber 5 and the soft rock sample are placed in the sample loading chamber 5, and the left and right sides of the sample loading chamber 5 are provided with a sliding protection groove 7 with a non-hollowed concave groove structure on the bottom plate, and the sliding protection groove 7 is seated in the bearing bottom plate 12 on the pulley 4, so that the sliding guard 7 can move left and right in the horizontal direction; the left and right sides of the sliding guard 7 are...

Embodiment 2

[0040] Such as Figure 1 to Figure 2As shown, a soft rock expansibility tester includes a lower support platform and an upper sample chamber 5, and a vertical load loading cap 1 is arranged on the upper part. Pressurization under deformation, and complete two pressurization modes of strain control and stress control at the same time; the sample is generally aimed at the rock sample of expansive soft rock, which is a cuboid, and the pressure-bearing plate of the vertical loading device above is 2 dimensions wide and the rock sample The width is the same, the length is slightly longer than the long side of the rock sample, and the size of the rock sample is a cuboid rock sample of 75mm×75mm×150mm.

[0041] The sliding groove guard plate 7 can move along with the lateral deformation of the rock sample. The sliding groove guard plate is a non-hollow concave groove on the bottom plate, and is seated on the pulley. Connect the force measuring device on both sides. A permeable boa...

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Abstract

The invention relates to the fields of indoor tests in geotechnical engineering and geological engineering, relates to a tester for the lateral expansibility of a soft rock, and especially relates toa tester and a test method for the lateral expansibility and the expansion deformation of the expansive soft rock in the engineering field. The main body structure of the tester includes a loading cap, a pressure bearing plate, dynamometers, pulleys, a sample loading chamber, a water permeable plate, a sliding protection tank, a proving ring, a dial gage, a pressure display instrument, a filter paper, a bearing bottom plate and a stationary block. The test method makes the lateral expansion deformation and the lateral expansibility of the expansive soft rock under the action of vertical load have a high consilience with onsite data of the engineering, is an accurate test method for knowing the mechanical performances of the expansive soft rock in the engineering, and provides a basis for the lateral deformation of the soft rock.

Description

Technical field: [0001] The invention relates to the technical field of laboratory tests in geotechnical engineering and geological engineering, and relates to a soft rock lateral expansion tester, in particular to a soft rock lateral expansion tester and a test method. Background technique: [0002] Expansive soft rock refers to a low-strength engineering rock mass containing clay with high expansibility minerals, which undergoes significant deformation under low stress (<25MPa) conditions. Currently, there is no special instrument for the expansibility tester of expansive soft rock. , most dilatation measuring instruments are aimed at cohesive soil and undisturbed soil. Therefore, the test and research on the lateral deformation and expansion force of expansive soft rock in the horizontal direction has strong engineering significance. The damage of expansive soil to engineering buildings is all-encompassing, and this damage is often long-term and gradual. potential, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08G01N3/06
CPCG01N3/06G01N3/062G01N3/08G01N2203/0019G01N2203/0075G01N2203/0605G01N2203/0676G01N2203/0682
Inventor 冯磊王旭春冯燕唐强张鹏管晓明杜明庆于云龙李伟余志伟杨怀远孙健胡瑞
Owner QINGDAO TECHNOLOGICAL UNIVERSITY