High pressure solid clay pervasion test device

Abstract

The invention discloses a high compact clay permeability testing device, characterized by comprising a nitrogen tank with a pressure indicating gauge; a high pressure water can with an air intake and a group of water outtakes; a permeameter consisting of a base equipped with a center hole and a bolt hole and fixed with a needle, an outer tube equipped with a center hole, a bolt hole,with the bottom surface superimposed with a top surface of the base, a piston equipped with a water intake with the lower segment sleeved in the center hole of the outer tube, and a bolt; an air conduit with one end communicating with the air outtake of the nitrogen tank and the other end communicating with the air intake of the high pressure water can; a discharging tube with one end communicating with the water intake of the piston and the other end communicating with the water outtake of the high pressure water can; and a water collecting tank communicating at the lower end of the needle. The invention has simple structure, short measurement test period, high precision, capable of measuring any medium with the permeability coefficient smaller than 10<-9> cm / s, particularly suitable for the test of the high compact clay filter performance.

Description

High Compacted Clay Penetration Test Apparatus technical field The invention belongs to a device for testing the permeability of granular materials, and relates to a high-compacted clay penetration test device. The device is especially suitable for the permeability test of high compacted clay and any medium with a permeability coefficient less than 10-9cm / s. Background technique The permeability of soil is the ease with which free water flows through the soil. It is an important property of soil. The permeability coefficient reflects the permeability of the soil and is one of the important physical properties of the soil. Its measurement method is called the permeability test. Indoor permeability test methods include constant head method and variable head method. The constant head penetration test is suitable for coarse-grained soils, and the variable head penetration test is suitable for fine-grained soils. It is difficult to accurately measure the permeability coeffi...

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Problems solved by technology

There is no recognized device that can accurately and quickly measure the permeability coefficient

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