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Pressuremeter test method considering temperature effect

A side pressure test and temperature effect technology, which is applied in the field of foundation soil survey, construction, foundation structure engineering, etc., can solve the problems of large soil disturbance and unreported problems

Active Publication Date: 2019-06-14
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the need to take soil, the disturbance to the soil is large; therefore, the results of the indoor test are poor compared with the in-situ test
[0005] However, in-situ testing instruments for soils affected by temperature have not been reported at home and abroad.

Method used

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  • Pressuremeter test method considering temperature effect

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Embodiment 1

[0030] Embodiment one: the condition of the foundation mentioned in the background technology is characterized in that the temperature of the soil under the foundation is in a "high temperature" state for a long time; The calculated results of structure settlement and bearing capacity are quite different from the actual situation.

[0031] At the same time, there is still a lack of data support for the impact of different temperatures on the settlement and bearing capacity calculation results of the soil.

[0032] In order to study the above-mentioned effects, the bypass pressure testing apparatus of the present invention is proposed.

[0033] A side pressure test instrument, comprising: side pressure instrument 1, cylinder 2;

[0034] The side pressure instrument 1 includes: a monitoring device 1-1, a high-pressure gas cylinder 1-2, and a side pressure device 1-3; the side pressure device includes: a circular metal frame and a rubber film wrapped outside the metal frame;

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Abstract

The invention relates to a pressuremeter test method considering a temperature effect. A pressuremeter and a cylinder are used, and the cylinder has a heating function. According to the design key points, the pressuremeter test method comprises the steps that first, a heating wire of the cylinder starts to heat, and after the cylinder reaches a predetermined temperature, the cylinder is pressed into soil on site; second, after the cylinder is pressed into a soil body, the soil body is continuously heated for a period of time; third, a hole is drilled in the center of the cylinder, a pressuremeter device of the pressuremeter is then placed into the hole, and the temperature T of the test soil is measured through a temperature sensor; and fourth, a pressuremeter loading test is carried out to obtain a P-V curve. By adopting the pressuremeter test method, the pressuremeter test of soil bodies at different temperatures can be carried out to meet the requirements of scientific research andengineering.

Description

technical field [0001] The patent of the present invention relates to the field of foundation in-situ testing, in particular to a side pressure test method considering the temperature effect. Background technique [0002] In 1967, Passwell proposed the concept of thermal consolidation. He conducted a heating test on the soil under constant load conditions and found that the shape of the compression curve of the soil volume over time is similar to the standard consolidation test curve. In 1968, Campanella conducted consolidation tests at different temperatures under the condition of isotropic isobaric consolidation, and studied the pore water pressure caused by thermal effects. In 1990, Hueckel et al. carried out triaxial consolidation tests under different temperature conditions and temperature and load cycles on cohesive soils in different over-consolidated states. As mentioned above, temperature has a great influence on the properties of soil; therefore, engineering and a...

Claims

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Application Information

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IPC IPC(8): E02D1/02
Inventor 吴则祥余闯蔡晓庆涂冬媚
Owner WENZHOU UNIVERSITY
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