Indoor sand grouting simulation test device and testing method thereof

Abstract

The invention discloses an indoor sand grouting simulation test device and a testing method thereof. The device comprises an air compressor, a storage barrel, a grouting barrel, a water tank, two CCDcameras, a laser, a synchronizer and a calculator, wherein the storage barrel is respectively connected with the air compressor and the grouting barrel; the water tank is connected with the water inlet of the grouting barrel, and is used for injecting water to the grouting barrel for simulating underground water; transparent sands for testing is stored in the grouting barrel; the two CCD cameras are respectively arranged under and beside the grouting barrel; and the projecting surface of the laser is vertical to the shooting direction of the CCD cameras. The indoor sand grouting simulation test device can be used for simulating different underground water pressures, different crustal stresses, different grouting pressures, different grain sizes, different grouting pipe diameters and otherexperimental work conditions; and furthermore, in a test, molten quartz sands and mineral oil in a certain proportion are used to prepare the transparent sands, and visualization of grout and sand motion tracing in a grouting test process can be realized by applying a PIV technology.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to an indoor sand and soil grouting simulation test device and a test method thereof. Background technique [0002] Various basic problems need to be dealt with in the construction of water conservancy projects. Among them, the sandy soil stratum is very difficult to deal with due to its high permeability. The application of grouting technology can significantly reduce the permeability coefficient of sandy soil and improve the bearing capacity of the foundation. The development process of action modes such as densification or splitting cannot be directly observed, which makes the research on grouting theory based on laboratory tests far behind the needs of engineering practice. [1-3] , It also makes the grouting process more dependent on experience, and the room for improvement and improvement is limited. The relative lag of indoor grouting research seriously...

AI Technical Summary

Problems solved by technology

The application of grouting technology can significantly reduce the permeability coefficient of sandy soil and improve the bearing capacity of the foundation. The development process of action modes such as densification or splitting cannot be directly observed, which makes the research on grouting theory based on laboratory tests far behind the needs of engineering practice. [1-3] , which also makes the grouting process more dependent on experience, and the room for improvement and improvement is limited

The relative lag of indoor grouting research seriously restricts the construction of water conservancy projects in complex strata, so it is urgent to carry out relevant indoor experimental research in this area [4]

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