Cement-soil ring knife sample preparation device and cement-soil permeability coefficient measurement method and equipment

Abstract

The invention relates to a cement-soil ring knife sample preparation device and a cement-soil permeability coefficient measurement method and equipment, wherein the method includes: step S1: cutting the cement-soil sample obtained on site into a cylindrical shape; step S2: fixing the standard ring knife To assemble the standard ring cutter and the steel cylinder at the designated height of the steel cylinder; step S3: put the cut cylindrical cement soil sample into the steel cylinder equipped with the standard ring cutter, and place it on the test bench; step S4: pour the melted industrial wax along the inner wall of the steel cylinder until it submerges the entire cylindrical cement soil sample; step S5: let the sample stand until the industrial wax is completely cooled, and disassemble the steel cylinder; step S6: cut off the standard ring The excess cement soil at both ends of the knife is flattened to obtain a cement-soil ring knife sample; Step S7: Install the cement-soil ring knife sample in an automatic tester for variable water head penetration test, and measure the cement-soil permeability coefficient. Compared with the prior art, the invention can well solve the problem of water-stopping on the side wall of the sample and achieve a good water-stopping effect.

Description

Technical field[0001]The invention relates to the field of underground engineering material performance testing, in particular to a cement-soil ring knife sample preparation device and a method and equipment for measuring the cement-soil permeability coefficient.Background technique[0002]The consolidated body formed by mixing cement slurry with soil by grouting, deep mixing, and high-pressure rotary spraying is called cement soil. The hydrolysis and hydration of cement and the cementation and ion exchange between cement slurry and soil particles reduce the dispersion of soil particles, and the further agglomeration of soil particles reduces or even closes the pores, so the strength and impermeability of cement soil are greatly improved. In actual engineering, cement-soil mixing piles are widely used in anti-seepage projects such as deep foundation pits, water-proof curtains, seepage prevention dams, etc., and cement-soil mixing piles are useful for pollutant isolation in landfills a...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a cement-soil ring knife sample preparation device and a cement-soil permeability coefficient determination method and equipment in order to overcome the shortcomings of the existing flexible wall cement-soil permeability coefficient measurement method that the sample preparation is difficult and cannot be standardized

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