Device for testing extrusion process of coral sand around expansion pile through CT and application method

Abstract

The invention discloses a device for testing the extrusion process of coral sand around an expansion pile through CT and an application method. The invention aims at solving the problems that the crushing process of coral sand particles is inconvenient to observe, and the stress crushing characteristics of the coral sand cannot be well summarized. The crushing process of the coral sand under the action of the expansive concrete with different expansive agent concentrations is observed; the coral sand pile-forming crushing stress mechanism and the mechanical response in the actual engineering are simulated; the mechanical response and deformation conditions of the coral sand under the action of loads of different grades and different directions can be quantitatively researched; and the crushing characteristics of the coral sand under the stress condition are obtained by researching the corresponding relation of the compression settling volume, shape, particle size and load value of thecoral sand in the experiment process. The observation problem of the crushing process of the coral sand under the stress condition is solved, the mechanical response and deformation conditions of thecoral sand under loads of different grades and different directions are obtained, and wide engineering practice significance and application prospects are achieved for researching and summarizing thestress crushing characteristics of the coral sand.

Description

technical field [0001] The invention relates to the field of crushing characteristic test equipment under the stress of coral sand, in particular to a device for CT testing the extrusion process of coral sand around expansion piles and a method for using it. Background technique [0002] The construction of offshore projects is mostly far away from the mainland, and the transportation is inconvenient. If natural sand and gravel are transported from the mainland by boat, the construction cost will be increased, the construction period will be extended, and it will have a negative impact on the construction and development of offshore projects. Therefore, how to use marine building materials as much as possible, and how to effectively use the coral sand that exists in large quantities on islands to serve offshore projects is an urgent problem that needs to be solved. [0003] Coral sand is the main foundation soil on coral reefs, and its properties are significantly different ...

AI Technical Summary

Problems solved by technology

In addition, under high pressure, coral sand particles are prone to particle breakage in the force layer at the pile end, which causes the compressibility of the soil layer to increase and the strength to soften. Destabilization

[0004] Aiming at the problem that coral sand particles have the characteristics of low strength and easy breakage, but the breaking process of coral sand particles is not easy to be observed comprehensively, and it is impossible to make a good summary of the force breaking characteristics of coral sand. The device and testing technology, this device can simulate the stress of coral sand in actual engineering, and obtain the change image and force change diagram of coral sand under stress, so as to obtain the force breaking characteristics of coral sand. The deformation process of the observed coral sand, the pressure sensor sheet records the force change, and the CT machine observes the deformation result of the coral sand, which can better summarize the force deformation characteristics of the coral sand and effectively solve the above-mentioned engineering problems in the island construction project , has extensive engineering practical significance and application prospects

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