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Indoor device and method for measuring thixotropy of soil samples

A thixotropy, internal measurement technology, applied in the direction of measuring device, strength characteristics, using stable tension/pressure to test material strength, etc. The degree of soil disturbance is vaguely defined, etc., to achieve the effect of scientific and rigorous device design, strong practicability, and clear definition

Inactive Publication Date: 2017-05-31
TAIYUAN UNIV OF TECH
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Problems solved by technology

At present, the research direction of soil thixotropy can be divided into two directions: thixotropy mechanism and thixotropic influencing factors. The influencing factors of soil thixotropic strength growth are also mostly focused on the influence of construction methods on it, while the influence of soil physical properties on soil thixotropy is less discussed
And the main research method is experimental research, but the definition of soil disturbance degree is vague in the test process, and the relationship between disturbance degree and static strength recovery degree is not elaborated in detail, and the obtained results cannot well represent the thixotropy of soil

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  • Indoor device and method for measuring thixotropy of soil samples

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Embodiment Construction

[0037] In order to illustrate the present invention more clearly, the measuring device and method are described in more detail below in conjunction with the accompanying drawings and the actual situation in the room:

[0038] An indoor measurement device for soil sample thixotropy, comprising a stirring disturbance machine, the disturbance stirring machine comprises a cylindrical lower cylinder body 5 (22 cm high, 22 cm external diameter, 20 cm internal diameter, bottom thickness 1.5 cm) with the opening facing upwards , threaded on the upper stirring cover 1 (height 8cm, outer diameter 24cm, inner diameter 22cm, cover thickness 0.6cm) at the opening of the lower cylinder body 5, installed on the middle part of the inner side of the upper stirring cover 1 and the motor 2 with the output end facing down (power 550w), fixed on the power shaft 3 at the output end of the motor 2 (shaft length 5cm, shaft diameter 0.6cm), a number of stirring blades 4 (four blades, each stirring blad...

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Abstract

The invention relates to the technical field of thixotropy of soil bodies, and specifically relates to an indoor device and method for measuring thixotropy of soil samples. The indoor device for measuring thixotropy of soil samples comprises a disturbance stirrer, wherein the disturbance stirrer comprises a columned lower cylindrical body having an upward opening, an upper stirring cover which is in threaded fit with the opening of the lower cylindrical body, a motor which is arranged in the middle of the inner side of the upper stirring cover and is provided with a downward output end, a power shaft fixedly arranged at the output end of the motor, and a plurality of stirring blades which are evenly arranged at the lower end of the power shaft and are radially distributed, the upper stirring cover is provided with a wiring hole, and the motor is connected with an operating system through the wiring hole. The indoor device and method for measuring thixotropy of soil samples, provided by the invention, have the advantages that different disturbance stirring powers (disturbance degrees) can be achieved by controlling the stirring time, so that the strength recovery data of a plurality of groups of soil bodies can be measured, and thus the absolute strength recovery relation and the relative strength recovery relation of the soil bodies are obtained.

Description

technical field [0001] The invention relates to the technical field of thixotropy of soil, in particular to an indoor measuring device and method for measuring thixotropy of soil samples. Background technique [0002] Thixotropy means that under the action of external force, the structural strength of soil is drastically reduced, and even flows. A phenomenon in which structure and strength gradually recover over time after cessation of external force. During the construction process of dynamic ramming and piling, the foundation soil is subjected to impact loads to generate vibrations, and the thixotropy of the highly sensitive soil may lead to a significant reduction or even loss of the strength of the soil, resulting in instability of the foundation soil and landslides, and even post-construction Settlement, these engineering disasters cannot be ignored. [0003] In today's society, domestic and foreign scholars began to pay attention to the thixotropy of soil very early....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08
CPCG01N3/08G01N2203/0019G01N2203/0075
Inventor 韩鹏举郝钰王美茹谢瑞珍
Owner TAIYUAN UNIV OF TECH
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