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A Novel Hybrid Boundary True Triaxial Apparatus with Independent Loading in Three Directions

A technology of true triaxial instrument and independent loading, applied in the direction of applying stable tension/pressure to test the strength of materials, instruments, scientific instruments, etc., it can solve the problems of interference, friction effect, rigid plate influence, etc., to reduce the influence, Reduce the effect of friction and eliminate the effect of influence

Active Publication Date: 2021-07-23
HOHAI UNIV
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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a new type of mixed boundary true triaxial instrument with independent loading in three directions. Through this device, the loading force transmission device can cooperate with the deformation of the soil body, avoiding interference with loading in other directions, and effectively solve the problem of loading. End friction effect and the influence of rigid plates on the shear failure surface

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  • A Novel Hybrid Boundary True Triaxial Apparatus with Independent Loading in Three Directions
  • A Novel Hybrid Boundary True Triaxial Apparatus with Independent Loading in Three Directions
  • A Novel Hybrid Boundary True Triaxial Apparatus with Independent Loading in Three Directions

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Embodiment Construction

[0044] A new hybrid boundary true triaxial instrument with three-way independent loading of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0045] Such as figure 1 , Figure 13 with Figure 14 As shown, a new type of mixed boundary true triaxial instrument with independent loading in three directions, including setting at the maximum principal stress σ of the sample 1 Direction of semi-rigid loading system 1, set the principal stress σ in the specimen 2 Direction of the hybrid loading system 2 and set at small principal stresses σ 3 Direction of flexible loading system 3.

[0046] Place the true triaxial instrument of this embodiment on the upper and lower sides, the front and rear sides and the left and right sides of the cuboid sample, and apply a large principal stress σ to the sample respectively 1 , medium principal stress σ 2 and the small principal stress σ 3 .

[0047] The...

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Abstract

The invention provides a new mixed boundary true triaxial instrument with independent loading in three directions, which belongs to the technical field of indoor geotechnical test equipment, including 1 A semi-rigid loading system in the direction (1), set the principal stress σ in the specimen 2 Direction of hybrid loading system (2) and set at small principal stress σ 3 direction of the flexible loading system (3). The present invention can guarantee σ 2 The directional loading device deforms synchronously with the sample to prevent the embedding of soil particles and at the same time weaken the σ 2 Additional shear stress generated by the directional loading device; σ 1 and σ 2 The loading system of is semi-rigid, σ 3 The loading system is flexible, which can completely eliminate the influence of rigid surface loading on the shear surface. The invention provides a new mixed boundary true triaxial instrument, which can be independently loaded in three directions of stress space without mutual interference, can realize true triaxial test under complex stress path, and obtain the real shear plane of soil and the stress-strain relationship.

Description

technical field [0001] The invention relates to a novel mixed boundary true triaxial instrument with independent loading in three directions, and belongs to the technical field of indoor geotechnical test equipment. Background technique [0002] The true triaxial test loading force transmission device is a kind of indoor geotechnical test equipment in the field of civil engineering. The sample of the true triaxial test is a cube, and the principal stress component σ is applied to the three faces of the cube respectively. 1 , σ 2 , σ 3 , in order to truly simulate the three-dimensional stress state of the soil, and combine the three principal stresses arbitrarily, the three-dimensional stress-strain relationship of the soil under any stress state can be obtained. Compared with the conventional triaxial test, the true triaxial test can study the mechanical properties of the soil under complex stress states, and is the main instrument for studying the constitutive model of th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08G01N3/02
CPCG01N3/02G01N3/08G01N2203/0019
Inventor 朱俊高潘蕾朱材峰王龙包梦蝶
Owner HOHAI UNIV
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