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Device and method for testing interface friction performance of clay-based material

A testing device and interface friction technology, which is applied to measuring devices, analyzing materials, and adopting mechanical devices, can solve problems such as large measurement errors, failure to consider factors of formation consolidation, and failure to observe formation disturbances, so as to control soil disturbances , good effect of soil disturbance

Pending Publication Date: 2022-04-12
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Therefore, the technical problem to be solved by the present invention is to overcome the problem that the mud drag reduction effect measurement and calculation device in the prior art does not consider the factors of formation consolidation, and cannot observe the disturbance of the formation caused by shield tunneling, which leads to large measurement errors. Provide A clay-based material interface friction performance test device and test method, which can realize the visual test of the clay-based material friction performance in the process of shield tunneling, and can effectively measure the drag reduction effect of the clay-based material

Method used

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  • Device and method for testing interface friction performance of clay-based material
  • Device and method for testing interface friction performance of clay-based material
  • Device and method for testing interface friction performance of clay-based material

Examples

Experimental program
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Effect test

Embodiment 1

[0039] refer to figure 1 Shown, a kind of clay-based material interface friction performance testing device of the present invention comprises:

[0040] The test box 1 is used to fill the soil sample or clay-based material 2, and the side wall of the test box 1 is provided with an in-out through hole, and the soil sample or clay-based material 2 filled in the test box 1 is higher than the in-out hole. hole;

[0041] The test slide plate 5 is inserted into the in-out through hole and can slide along the in-out through hole;

[0042] The transmission test device is connected with one end of the test slide 5, and the transmission test pulls the test slide 5 to slide along the in-out through hole, and measures the required pulling force when pulling the test slide 5 to slide;

[0043] An air pressure device communicated with the test box 1 to apply pressure to the soil sample or clay-based material filled in the test box 1;

[0044] In the clay-based material interface friction p...

Embodiment 2

[0052] refer to image 3 As shown, on the basis of the above-mentioned embodiment 1, in order to make the pressure applied by the air compressor uniformly act on the soil sample or clay-based material 2, so as to truly simulate the consolidation pressure of the buried deep soil, the The test box 1 is also filled with a watertight layer 4, the watertight layer 4 is arranged above the soil sample or clay-based material 2, the air pressure device applies pressure to the watertight layer 4, and the watertight layer 4 and the soil An anti-seepage film 3 is arranged between the samples or clay-based materials 2, and the edge of the anti-seepage film 3 is attached to the inner wall of the box, and the pressure is applied to the watertight layer 4 by the air pressure device to make the applied pressure evenly distributed On the soil sample or clay-based material 2 , water is prevented from entering into the soil sample or clay-based material 2 through the anti-seepage film 3 , and the...

Embodiment 3

[0054] refer to Figure 4 As shown, a kind of clay-based material interface friction performance testing method of the present invention adopts the testing device of above-mentioned embodiment 1, comprises the following steps:

[0055] S1. Insert the test slide 5 into the test box 1, start the air pressure device, and test the air tightness in the test box 1. In order to ensure that the air pressure device can apply pressure to the test box 1, it is necessary to test the air Check the airtightness. If there is an air leak in the test box 1, the pressure applied by the air pressure device is inaccurate and unstable. The airtightness test in this embodiment is mainly aimed at the connection between the box body and the sealing cover 12. The detection between, and the airtightness detection to inserting the in and out through hole place of test slide plate 5;

[0056] S2, start the transmission test device, measure the pulling force F0 required for pulling the test slide 5 in th...

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Abstract

The invention relates to a clay-based material interface friction performance testing device and method, the testing device comprises: a testing box used for filling a soil sample or a clay-based material, the side wall of the testing box is provided with an access through hole, and the soil sample or the clay-based material filled in the testing box is higher than the access through hole; the test sliding plate is inserted into the in-out through hole and can slide along the in-out through hole; the transmission testing device is connected with one end of the testing sliding plate, pulls the testing sliding plate to slide along the in-out through hole, and measures the pulling force required when the testing sliding plate is pulled to slide; the air compression device is communicated with the test box and applies pressure to the soil sample or the clay-based material filled in the test box; the test method adopts the test device and is realized by a variable comparison and control method. According to the invention, the visual test of the friction performance of the clay-based material in the shield construction process is realized, and the drag reduction effect of the clay-based material can be effectively measured and calculated.

Description

technical field [0001] The invention relates to the technical field of clay-based material performance testing, in particular to a clay-based material interface friction performance testing device and a testing method. Background technique [0002] In recent years, my country's urban subway construction has entered a period of rapid development. Shield method construction has the characteristics of fast construction speed, high safety factor, and small surface deformation. It is the main construction method for urban tunnel construction. Due to the characteristics of this construction method, over-excavation will inevitably occur during shield excavation, resulting in stratum loss and deformation of surrounding strata and existing buildings. The core of controlling formation deformation is to fill the over-excavation area of ​​shield tunneling with appropriate filling materials and reasonable filling parameters to reduce formation loss. Filling the excavation gap with good p...

Claims

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Application Information

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IPC IPC(8): G01N19/02
Inventor 刘维颜静
Owner SUZHOU UNIV
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