Undisturbed soil sample expansion force testing device capable of controlling saturation

A testing device, non-disturbance technology, applied in measuring devices, soil material testing, force/torque/work measuring instruments, etc., can solve the problems of large disturbance of soil sample structure, inability to effectively control saturation state, long testing time, etc. The effect of reduced end restraint effect, less time-consuming test and simple structure

Active Publication Date: 2012-12-05
XIAN UNIV OF TECH
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Problems solved by technology

[0016] The purpose of the present invention is to provide a soil sample expansion force testing device that can control saturation without disturbance, which effectively overcomes the large disturbance to the soil sample structure in...

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  • Undisturbed soil sample expansion force testing device capable of controlling saturation
  • Undisturbed soil sample expansion force testing device capable of controlling saturation
  • Undisturbed soil sample expansion force testing device capable of controlling saturation

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Embodiment Construction

[0033] Such as figure 1 As shown, the present invention is a non-disturbance controllable saturated soil sample expansion force test device, including a base support system. The base support system plays an integral role in the test process. The base support system includes a movable frame 1, on which a base plate 2 is fixed, and a base 3 is installed on the base plate 2 through hexagonal bolts 4, and the base 3 is used to fix a horizontal lower plate 5. A cylindrical ring knife seat 6 and a cylindrical ring knife 9 are coaxially installed on the bottom plate 5. The specific installation method is: the bottom plate 5 is provided with a raised ring blade foot external support ring 7, and the ring knife edge foot external support ring The ring 7 can prevent the phenomenon of eversion of the blade and foot of the ring knife 9 caused by the expansion of the soil sample 8 during the test process, which can prevent the lateral expansion of the expansive soil volume and prevent the ...

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Abstract

The invention discloses an undisturbed soil sample expansion force testing device capable of controlling the saturation. The device comprises a base supporting system, wherein a lower disc is fixed on the base supporting system, a cutting ring base and a cutting ring are arranged on the lower disc, and the upper part of the cutting ring base is provided with an upper cover; a central circular groove and an annular groove are formed on the lower disc, a soil pressure sensor is arranged in the central circular groove, an annular water penetration plate is arranged in the annular groove, water-immersion circular grooves are formed on the annular water penetration plate, water-permeable stones are uniformly placed in the water-immersion circular grooves, and the bottom of the annular groove is connected with an external water injection system through a pipeline; a soil sample is placed between the lower disc and the cutting ring, and a water-permeable plate base which is provided with a water-permeable plate and water-permeable holes is arranged on the top of the soil sample; and a plunger, overflow equipment and vacuum extraction equipment are arranged on the upper cover. The device effectively solves the problems that testing devices for an expansion back pressure method, a pressurization expansion method and a balance pressurization method have relatively large disturbance on soil sample structures, cannot effectively control strict saturation states and are relatively long in testing time consumption.

Description

technical field [0001] The invention belongs to the technical field of soil sample physical quantity test equipment, and in particular relates to a soil sample expansion force test device which can control saturation without disturbance. Background technique [0002] Geotechnical test is one of the basic contents of soil mechanics research. Geotechnical test can reveal the unique mechanical properties of soil, determine various theoretical and engineering design parameters, and at the same time verify the correctness and practicability of various theories. Therefore, the geotechnical test plays an irreplaceable role in the theoretical research and engineering application of soil mechanics. [0003] Because of the importance of the geotechnical test, the accuracy of the geotechnical test is valued. The accurate determination of soil sample parameters in soil engineering tests is more related to the correctness and feasibility of theoretical research. Therefore, the new test...

Claims

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Application Information

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IPC IPC(8): G01N33/24G01L5/00
Inventor 李荣建段浩闫蕊车高凤李海涛吴利言
Owner XIAN UNIV OF TECH
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