Hele-Shaw thin plate test instrument with adjustable plate spacing

Abstract

The invention discloses a Hele-Shaw thin plate test instrument with an adjustable plate spacing. The Hele-Shaw thin plate test instrument comprises a lower organic glass plate and an upper organic glass plate which are arranged in an annular metal plate; an annular metal block arranged in an annular groove is arranged on the lower organic glass plate; sponge is arranged around the annular metal block; an adjusting bolt is arranged at the bottom of the annular metal block; the upper organic glass plate and the lower organic glass plate are in non-contact connection with each other through a plurality of fixing bolts; a closed water storage tank is formed between the upper organic glass plate and the annular metal plate and between the lower organic glass plate and the annular metal plate;the upper organic glass plate is provided with a through hole; and the water storage tank is provided with a water and air outlet, a pore pressure sensor interface and a water inlet. The space betweenthe two plates is filled with saturated sand to obtain a saturated sand layer corresponding to the thickness of a feeler gauge; and during a test, water flows into the water storage tank from the water inlet, then enters the sample through the sponge, erodes the sample and flows out from the water outlet. According to the invention, the distance between the two plates can be adjusted, and the influence mechanism of the change of the distance between the plates on the test result is explored.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and relates to a Hull-Shore thin plate test instrument with adjustable plate spacing. Background technique [0002] The Hull-Shore thin plate test apparatus has a compact structure and can simulate the flow of binary potential forces in hydrodynamics. Since the Hull-Shore thin plate test instrument uses a plexiglass plate, it has good visualization performance for the test process, and can record the change process of the test target through the camera, and the distance between the two plates is small. It can ensure that the fluid is laminar. When the Hull-Shore thin plate test instrument is used in the seepage erosion test of sandy soil, the saturated sand is evenly filled into the pores of the plate, and the water flows through to observe the erosion of the saturated sand. [0003] From the characteristics of the Hull-Shore thin plate test instrument, it can be known that the...

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Problems solved by technology

[0003] From the characteristics of the Hull-Shore thin plate test instrument, it can be known that the observed test results are closely related to the size of the gap between the two glass plates, while the distance between the two plexiglass plates of the traditional Hull-Shore thin plate test instrument is The adjustment cannot be changed, which means that a set of thin plate testing instruments can only do a set of tests corresponding to its thickness, and when it is actually required to obtain multiple sets of different test results, the traditional Hull-Shore thin plate testing instrument not able to meet the requirements

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