Partition lateral pressure creep test device for coral sand foundation and application method of partition lateral pressure creep test device

Abstract

The invention discloses a partition lateral pressure creep test device for a coral sand foundation and an application method of the partition lateral pressure creep test device. The partition lateralpressure creep test device for the coral sand foundation comprises a sand pump, a pressure device and a pushing device. The pressure device comprises a rubber capsule, a capsule top plate and a central steel pipe. The rubber capsule is of a hollow cylindrical structure with an upper opening and a lower opening. The capsule top plate is in sealing connection with the upper bottom surface and the lower bottom surface of the rubber capsule. The central steel pipe penetrates through the axis of the rubber capsule. The sand pump is connected with the rubber capsule through a sand delivery pipe. Thepushing device is connected with the side surface of the rubber capsule, and displacement occurs with the expansion of the rubber capsule. According to the partition lateral pressure creep test device for the coral sand foundation, a partition-type test form is adopted, and meanwhile, solid-liquid mixing is used as an expansion medium for the main pressurizing; and ethanol liquid is subjected toelectronic control heating to generate saturated vapor pressure to perform auxiliary accurate pressure control, and the pressurizing mode lowers the requirements for the airtightness of the device, and guarantees the stability and accuracy of the applied pressure under the long-term creep test.

Description

technical field [0001] The invention relates to the technical field of geotechnical survey, and specifically includes a partitioned lateral pressure creep test device for coral sand foundations and a use method. Background technique [0002] With the continuous development of science and technology, people need to build various buildings on various foundation soils to meet daily life production and scientific research activities, but because the physical properties of various foundation soils are different, so for Every different foundation soil needs to study its basic physical properties in order to reduce various construction accidents caused by foundation problems. Coral sand is mainly a kind of foundation soil around the South China Sea. It is calcareous sand with high organic content, low strength and easy to break. Since the calcareous sand will be broken under a small stress, it is particularly important to conduct research and testing on its physical properties und...

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Problems solved by technology

The expansion space of the elastic outer membrane of this design probe is small, which is not suitable for the side pressure test of coral sandy soil, and there is still the problem that the test cannot be divided into different areas, and the error caused by the different soil conditions in different regions cannot be effectively avoided.

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