Injector type crushed rock permeability test device capable of adding sand continuously

Abstract

The invention provides an injector type crushed rock permeability test device capable of adding sand continuously. The injector type crushed rock permeability test device comprises a loading frame, a permeameter, a first hydraulic control system, a second hydraulic control system and a sand continuously-adding device, wherein a displacement sensor is arranged in the permeameter and is electrically connected with a paperless recorder; and the sand continuously-adding device comprises a primary sand adding channel, a fourth stop valve, an automatic sand adding device and an injector, wherein the fourth stop valve is arranged on the primary sand adding channel, one end of the primary sand adding channel is connected with the permeameter, the automatic sand adding device is connected with the primary sand adding channel, and the automatic sand adding device is provided with a sand adding opening. According to the test device, the frame material is greatly saved, the frame rigidity is enhanced, the volume of the device is reduced, the device is light, the manufacturability is improved, and the permeameter can be installed and moved easily; and besides, the injector type permeation is realized, the sand can be continuously added without machine halt, and thus the testing continuity is ensured.

Description

technical field [0001] The invention relates to the field of broken rock water-sand two-phase penetration test equipment, in particular to a syringe-type broken rock penetration test device with sustainable sand addition. Background technique [0002] At present, in mining engineering, tunnel engineering and other engineering fields with broken geological structures, safety problems such as water / solid inrush from subsidence columns and water / mud inrush in complex karst tunnels often occur. Problems such as water / solid inrush in subsidence columns and water / mud inrush in complex karst tunnels can all be considered as disasters caused by water-sand two-phase seepage instability in broken rocks, so the penetration test of water-sand two-phase seepage in broken rocks is It has become the basis for the study of water / solid inrush in subsidence columns and water / mud inrush in complex karst tunnels. [0003] Existing test devices for water-sand two-phase seepage of broken rocks a...

AI Technical Summary

Problems solved by technology

However, this system has the following disadvantages: the loading system generally adopts a large material testing machine, which is bulky and heavy, not only requires a large enough laboratory area, but also is not easy to move; the effective space of the compression chamber of the material testing machine is limited , cannot satisfy the placement of permeameters at different heights; the design of the compression chamber of the material testing machine is not humanized enough, and it is difficult to move the permeameter

In addition, the existing test device adopts the method of "water driving sand", and it needs to be shut down when replenishing sand, which greatly slows down the efficiency and continuity of the test

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