Partition side pressure creep test device and application method for coral sand foundation

Abstract

The invention discloses a partition side pressure creep test device for coral sand foundation and a using method, which includes a sand pump, a pressurizing device and a pushing device; the pressurizing device includes a rubber capsule, a capsule top plate and a central steel pipe , the rubber capsule is a hollow cylindrical structure with upper and lower openings, the top plate of the capsule is connected and sealed with the upper and lower bottom surfaces of the rubber capsule, and the central steel pipe runs through the axis of the rubber capsule; the sand pump is connected to the rubber capsule through the sand delivery pipe; the pushing device is connected with the rubber capsule The side surfaces of the rubber capsule are connected, and the displacement occurs with the expansion of the rubber capsule. The device adopts a partitioned test form, and at the same time uses solid-liquid mixture as the main pressurization medium, and uses electric control to heat ethanol liquid to generate saturated vapor pressure for auxiliary and precise pressure control. Using this pressurization method not only reduces the airtightness of the device requirements, but also to ensure the stability and accuracy of the applied pressure under long-term creep tests.

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...

AI Technical Summary

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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