Sand distribution device for preparing sand samples of different degrees of density in indoor model experiment

Abstract

The invention discloses a sand distribution device for preparing sand samples of different degrees of density in an indoor model experiment. The sand distribution device comprises a shakeout tank and a trolley platform, wherein a sand leaking plate is arranged at the bottom of the shakeout tank, round holes are uniformly formed in the sand leaking plate, two sand baffles are arranged under the sand leaking plate, the trolley platform can do a reciprocating motion along guide rails arranged on the shakeout tank, an opening-closing mechanism for opening and closing the sand baffles of the shakeout tank is arranged on the trolley platform, a control rod of the opening-closing mechanism penetrates through a spring base plate, a compression spring and a fastener from bottom to top and is mounted on a trolley platform plate, an anti-rotation key of the control rod is arranged on the trolley platform plate, and a baffling block for opening and closing the sand baffles at the bottom of the shakeout tank is arranged at the lower end of the control rod; anti-rebound baffling pins for preventing the sand baffles from falling are respectively arranged on the outer sides of bracket legs of the shakeout tank. The sand distribution device for preparing the sand samples of different degrees of density in the indoor model experiment has the beneficial effects that the disadvantages of a manual tamping method utilized in a preparation process of a traditional sand sample are overcome, the manpower and the time are saved, and the operation is convenient and rapid; the sand samples of the different degrees of density can be conveniently and rapidly prepared in the indoor model experiment of geotechnical engineering, so that the accurate control of physical characteristics of an experimental sand soil bed is realized, and an important foundation is laid for the accurate and reliable model test data.

Description

technical field [0001] The invention relates to a sand distribution device for preparing sand samples in indoor model tests of geotechnical engineering, in particular to a sand distribution device for preparing sand samples with different densities in indoor model tests. Background technique [0002] When carrying out civil engineering model tests or centrifuge model tests, it is often necessary to arrange sand and soil in the model soil box, and different tests have different requirements for the physical properties of the sand samples arranged in the model soil box. The prerequisite for successful model testing is the preparation of model sandy soil samples. Among them, the compactness of sandy soil is an important index to characterize its physical properties, which directly affects the engineering properties of sandy soil. In order to facilitate the control of the compactness of the sand sample, the sandy soil bed is often chosen to be rebuilt in the model test. In add...

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Problems solved by technology

This method has the disadvantages of difficult control of sand sample density, low repeatability, serious delamination effect of sandy soil samples, and labor and time consumption, which lead to low reliability of test results.

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