Determination instrument and determination method for osmotic coefficients of drilling and coring test part

Abstract

The invention discloses a determination instrument and determination method for osmotic coefficients of a drilling and coring test part, aiming at effectively avoiding influences of lateral wall seepage, determining the osmotic coefficients of common rock soil bodies and porous concrete and further determining the osmotic coefficients of a drilling and coring test part of the rock soil bodies before and after grouting. The technical scheme of the determination instrument is as follows: the determination instrument comprises a water outlet buffering region, a testing cavity and a water inlet buffering region which are arranged in sequence from top to bottom; the water outlet buffering region, the testing cavity and the water inlet buffering region are fixedly connected to form a sealed cavity; a water outlet is formed in the upper end of a lateral wall of the water outlet buffering region; an exhaust hole is formed in the top of the water outlet buffering region; a water inlet is formed in the lower end of the lateral wall of the water inlet buffering region; in a testing process, a testing part is arranged in the testing cavity; a seepage-proof layer is arranged between the test part and an inner lateral wall of the testing cavity; water permeable layers are arranged at the upper and lower ends in the testing cavity; in the testing process, the testing part is located between the water permeable layers at the two ends and is in contact with the water permeable layers.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to an instrument for measuring the permeability coefficient of a drilled coring test piece and a measuring method thereof. Background technique [0002] At present, commonly used permeameters, especially standard permeameters for testing, are used to measure the permeability coefficient of cutting media or loose layered filling media. These permeameters are not suitable for coring by drilling because they cannot avoid the problem of side wall seepage. The permeability coefficient of the specimen was obtained by the machine. Existing permeameters for measuring borehole coring specimens are mainly used in the testing of porous concrete specimens. The filter devices at both ends of the specimen have relatively large pores, so they are not suitable for the determination of the permeability coefficient of rock and soil before and after grouting, and Its measures for avoiding s...

AI Technical Summary

Problems solved by technology

[0002] At present, commonly used permeameters, especially standard permeameters for testing, are used to measure the permeability coefficient of cutting media or loose layered filling media. These permeameters are not suitable for coring by drilling because they cannot avoid the problem of side wall seepage. Permeability coefficient obtained by machine

Existing permeameters for measuring borehole coring specimens are mainly used in the testing of porous concrete specimens. The filter devices at both ends of the specimen have relatively large pores, so they are not suitable for the determination of the permeability coefficient of rock and soil before and after grouting, and Its measures to avoid side wall seepage may be difficult or ineffective

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