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Test device for simulating slope site rock mass disintegration and test method of test device

A test device and rock mass technology, applied in the field of civil engineering, can solve the problems of not considering the lateral restraint effect, not reflecting the characteristics of large-scale samples, etc., and achieve the effect of accurate testing

Active Publication Date: 2018-02-02
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lateral restraint effect is not considered in the existing rock disintegration tests, which is obviously inappropriate, especially for extremely soft rocks with low strength.
(2) The size effect of the sample
The current research results show that the disintegration resistance of the rock block is closely related to its strength characteristics, and both are affected by the structural plane of the rock block. The disintegration test method cannot reflect the characteristics of larger size samples, which has a great impact on the disintegration resistance index I of the secondary dry-wet cycle d2 <25% more significant

Method used

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  • Test device for simulating slope site rock mass disintegration and test method of test device
  • Test device for simulating slope site rock mass disintegration and test method of test device
  • Test device for simulating slope site rock mass disintegration and test method of test device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: Confined Disintegration Test Study

[0029] The undisturbed samples of sandstone and mudstone were taken from K42+040, the pilot project of diverting the Yangtze River to the Huaihe River, in the middle of the channel, with a depth of 12-13m. Determination of the secondary cycle disintegration resistance index I of the rock by the standardized disintegration resistance test method d2 Both are less than 2.5%, which means strong disintegration, and the difference cannot be distinguished. On this basis, this experiment is to study the influence of confinement on the results of disintegration test.

[0030] experiment procedure:

[0031] (1) sample preparation, sandstone and mudstone are sampled with a ring knife on the spot, and the original state ring knife soil sample 16 is made with a soil cutting knife in the laboratory;

[0032] (2) Drying, put the sandstone and the mudstone two undisturbed ring knife soil samples 16 into the tray 15, and place the tray ...

Embodiment 2

[0041] Example 2: Disintegration deformation test under dry-wet cycle

[0042] As shown in Figure 1, the test device of the present invention simulates the disintegration of rock mass on the scene of the slope, including the collection equipment of humidification equipment, test box 7, test equipment and disintegration; test box 7 is placed in the temperature control room 11, The temperature control room 11 is equipped with a temperature controller 6 and a heating lamp 5; among them, the test box 7 is surrounded by a plurality of steel plates, forming a right-angled trapezoid with an opening at the top, and the angle between the hypotenuse of the test box 7 and the horizontal plane is 33.3 °~66.7°; the scouring water flowing out from the humidification equipment flows down along the hypotenuse of the test box 7; the bottom of the test box 7 is provided with a plurality of through-hole structures, and the rock mass 12 to be tested is placed in the test box 7; to be tested The d...

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Abstract

The invention discloses a test device for simulating slope site rock mass disintegration. The test device comprises a humidifier, a test box, test equipment and disintegrating object collecting equipment, the test box is placed in a temperature control room, a temperature controller and a heating lamp are arranged in the temperature control room, the test box is enclosed by a plurality of steel plates to form a right trapezoid with a top opening, and the included angle between a bevel edge of the test box and a horizontal plane ranges from 33.3 degrees to 66.7 degrees. Scouring water flow flowing out of the humidifier flows down along the bevel edge of the test box, a plurality of through hole structures are arranged at the bottom of the test box, rock masses to be tested are placed into the test box, disintegrating objects of the rock masses to be tested flow into the collecting equipment along the bevel edge of the test box, the collecting equipment is positioned at the lower end ofthe bevel edge of the test box, and the test equipment acquires the disintegrating deformation amount of the rock masses to be tested through a dial indicator arranged on the test box. By the aid of the test device, slope site conditions can be effectively simulated, rock mass disintegration characteristics are more reasonably and accurately tested, and rock mass strength change rules are grasped.

Description

technical field [0001] The invention relates to a test device and a test method for simulating on-site rock disintegration of a slope, belonging to the technical field of civil engineering. Background technique [0002] Existing test methods for disintegration of rock blocks. At present, the disintegration test is to take rock samples on site, and the rock blocks are generally 40-60g and about 30mm in diameter. The test mainly simulates the evaporation-rainfall weather conditions of the on-site climate through the drying-humidification cycle, and determines the collapse resistance of the rock block according to the phenomenon during the disintegration process of the rock block and the ratio of the dry mass of the particles larger than 2mm in the disintegrated product to the total mass deciphering characteristics. The disintegration resistance of the rock block reflects the mineral composition and content of the rock block, the small-scale structure and structure characteri...

Claims

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Application Information

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IPC IPC(8): G01N3/32G01N1/04G01N1/28G01N1/44
CPCG01N1/04G01N1/286G01N1/44G01N3/32G01N2001/2873
Inventor 曹雪山刘扬李国维袁俊平吴建涛殷宗泽张坤勇
Owner HOHAI UNIV
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