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Testing device for measuring shearing strength parameter changes in solidifying process of soft clay

A technology of shear strength and parameter changes, applied in measuring devices, using stable shear force to test material strength, soil material testing, etc. and other problems, to achieve the effect of rich experimental types and universality

Active Publication Date: 2017-01-04
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the direct shear instrument and the triaxial instrument can reflect the characteristics that the shear strength of the soil increases with the increase of the effective stress of consolidation before shearing through experiments under different effective stress conditions of consolidation before shearing, they are different from those of soft clay foundations in actual engineering. Combined with simultaneous shearing, that is, the shear failure mechanism under the coupling of volume change and pore pressure is not consistent, and it cannot reflect the gradual change process of the shear strength of soft clay from the undrained state to the drained state.

Method used

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  • Testing device for measuring shearing strength parameter changes in solidifying process of soft clay
  • Testing device for measuring shearing strength parameter changes in solidifying process of soft clay
  • Testing device for measuring shearing strength parameter changes in solidifying process of soft clay

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Embodiment 1

[0032] The invention relates to a test device for measuring the change of shear strength parameters during the consolidation process of soft clay, comprising a frame 1, a loading plate 2, six miniature cross-plate shear instruments 3 with hole pressure testing functions, a torque meter, A sample chamber 5 for placing samples, a measuring unit and a lifting mechanism;

[0033] The bottom of the sample chamber 5 is provided with a drainage device, and the drainage device includes a drain plate 6 and a drain pipe 7; the sample chamber 5 is a cylinder, and the drain plate 6 is a circular plate whose diameter is equal to the inner diameter of the sample chamber 5;

[0034] The drain plate 6 is arranged at the bottom of the sample chamber 5, and the drain plate 6 and the bottom of the sample chamber 5 form a drain chamber, and one end of the drain pipe 7 is rotated to communicate with the drain chamber, and the other end of the drain pipe 7 can be adjusted to be in line with the samp...

Embodiment 2

[0057] like figure 1 As shown, a test device for measuring the change of shear strength parameters during the consolidation process of soft clay, including frame 1, loading plate 2, six miniature cross-plate shear instruments 3 with pore pressure test function, torsion meter, for The sample chamber 5 for placing the sample, the measuring unit and the lifting mechanism;

[0058] The bottom of the sample chamber 5 is provided with a drainage device, and the drain device includes a drain board 6 and a drain pipe 7; One end of the pipe 7 is rotated to communicate with the drain cavity, and the other end of the drain pipe 7 can be adjusted to be at the same height as the top wall of the sample chamber 5, and the drain pipe 7 is located outside the sample chamber 5; the sample chamber 5 is a cylinder, and the drain plate 6 is a circular plate whose diameter is equal to the inner diameter of the sample chamber 5;

[0059] The drain board 6 is provided with a plurality of evenly dis...

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Abstract

The invention relates to a testing device for measuring the shearing strength parameter changes in the solidifying process of soft clay and belongs to the technical field of soft clay analyzing devices. The testing device comprises a frame, a loading plate, miniature vane shearing instruments with a pore pressure testing function, a torsion meter, a sample chamber, a measuring unit and a lifting mechanism. The loading plate is arranged above the sample chamber, and the loading plate or the sample chamber is arranged on the frame through the lifting mechanism. The measuring unit comprises sensors used for collecting pore water pressure, soil pressure, displacement and other information. By means of the testing device, a shearing failure mechanism without volume change action or a shearing failure mechanism without pore pressure action can be independently studied, a shearing failure mechanism under volume change and pore pressure coupled action can be studied at the same time, and more testing types are achieved; shearing strength changes caused by soil body changes and pore pressure changes in the loading and solidifying process of soft clay can also be studied, and the changing rules of the shear strength parameters in the whole study process along with the solidifying process can be studied.

Description

technical field [0001] The invention relates to a test device for measuring the change of shear strength parameters during the consolidation process of soft clay, and belongs to the technical field of soft clay analysis devices. Background technique [0002] The shear strength of soft clay will increase with the dissipation of pore pressure and the increase of effective stress during the consolidation process, and the stability of the foundation will also develop dynamically with the change of loading process and shear strength. Therefore, when analyzing the stability of soft clay foundations, it is necessary to consider the change of shear strength caused by soil deformation and pore pressure changes during the loading and consolidation process, so as to carry out the gradual transition from the short-term stability of the loading construction period to the normal service period. The long-term stability, that is, the stability analysis of the entire life cycle. The enginee...

Claims

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Application Information

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IPC IPC(8): G01N3/24G01N33/24
CPCG01N3/24G01N33/24G01N2203/0025
Inventor 雷国辉高翔林城福
Owner HOHAI UNIV
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