Rock soil penetration air pressure solidification testing method

Abstract

The invention discloses a rock soil penetration air pressure solidification testing method. An adopted solidification instrument comprises a base 5, a cover plate 15, a scale water storage tank 7, a measuring cylinder 23, a pressure application device and a computer 6, wherein the cover plate 15 is supported on the base 5 through a supporting piece. The testing method comprises the following steps: before a test, turning on the computer, filling the scale water storage tank with water, recording a scale reading, sheathing soil samples with soft sheaths, and placing the soil samples between an upper permeable stone and a lower permeable stone; emptying air in the cavity of the base; switching off an exhaust valve of the base, and switching on an air inlet valve and an air suction valve so as to enable an air bag in an air bag cavity to be in contact with a wall of the air bag cavity, wherein an air gauge displays the value of the applied confining pressure; enabling the bottom of a pressure application shaft to be in full contact with the upper permeable stone, and applying weights on a jack; determining the solidification time according to geo-technical testing procedures; and after the test is over, recording the water yield in unit time, and calculating the permeability coefficient according to the Darcy law.

Description

technical field [0001] The invention relates to a osmotic air pressure consolidation test method. Background technique [0002] In the context of accelerated urbanization, various large-scale infrastructures in coastal urban areas of my country are successively constructed on soft clay foundations. As time goes by, various engineering problems often occur, and even lead to construction ) buildings were damaged to varying degrees. Settlement is the direct cause of geological disasters and engineering accidents in geotechnical engineering. In engineering practice, indoor consolidation tests are often used to explore the law of foundation settlement deformation. [0003] Consolidation instrument can be used for geotechnical compression test to evaluate the consolidation and creep deformation characteristics of soil. The compression index, modulus of resilience, and consolidation coefficient of the soil can be calculated through the compression curve. There are two main types ...

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Problems solved by technology

[0005] However, in engineering practice, there are high osmotic pressures in the intertidal zone (tidal area) subgrade engineering, port wharf engineering, high earth-rockfill dam engineering, and waterway engineering, and the lateral constraints of the soil are not rigid constraints within a certain range of research. , has a certain degree of elasticity. To some extent, the traditional seepage consolidation instrument cannot truly reflect the soil consolidation characteristics under the coupling effect of the seepage field and the stress field of the soil, and has the following two limitations:

[0006] (1) The instrument is bulky and occupies a large area;

[0007] (2) Due to the rigid constraint of the ring cutter, it is impossible to truly express the lateral deformation characteristics of the soil

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