Osmotic pressure measuring device for high water pressure test system

Abstract

The invention relates to an osmotic pressure measuring device for a high water pressure test system. The device comprises that: an osmotic pressure hole is formed in rock mass; one end of a seamless steel tube stretches into the bottom of the osmotic pressure hole; an osmometer is fixed at the bottom of the seamless steel tube; an osmometer cable passes through the seamless steel tube and stretches out of the osmotic pressure hole; an osmometer cable leading-out end of the seamless steel tube is blocked by an epoxy resin plug; one end of the seamless steel tube, which fixes the osmometer, is provided with a floral tube section; the outer side of the seamless steel tube above the floral tube section is provided with a rubber clapboard; a water stop kelp is bound on the rubber clapboard; an injection pipe is arranged in the osmotic pressure hole and stretches into the water stop kelp; a position above the water stop kelp of the osmotic pressure hole is blocked by a pure expanding cement block section; a position near the orifice of the osmotic pressure hole is blocked by a cement mortar plug; and an exhaust pipe is also arranged in the osmotic pressure hole and stretches into the pure expanding cement block section. The device has the advantages of simple structure, convenient operation and capability of effectively ensuring the reliability of a measuring element.

Description

technical field [0001] The invention relates to an osmotic pressure measuring device used in in-situ high pressure water permeability tests of rock mass in the fields of water conservancy and hydropower engineering, water supply engineering, petroleum engineering, etc., especially for the osmotic pressure used when the rock mass osmotic pressure is high measuring device. Background technique [0002] Under the existing technical conditions, the pressure holes in the high-pressure water test are generally simply grouted and plugged with modified cement mortar or modified cement slurry. The disadvantage of this process is that during the grouting process, it is easy to cause the piezometer to be cemented by the cement slurry poured in later, resulting in the failure of the piezometer, and the effective measurement effect of seepage pressure cannot be achieved, and its construction quality is difficult to guarantee. . At the same time, since only one piezometer is installed a...

AI Technical Summary

Problems solved by technology

The disadvantage of this process is that during the grouting process, it is easy to cause the piezometer to be cemented by the cement slurry poured in later, resulting in the failure of the piezometer, and the effective measurement effect of seepage pressure cannot be achieved, and its construction quality is difficult to guarantee.

At the same time, since only one piezometer is installed at a certain position in the rock mass, it is easy to cause the consequences of complete failure of the seepage pressure measurement of the piezometer after the piezometer fails.

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