Coarse-grained soil ultrahigh pressure grain crushing indoor compression test device

Abstract

The invention discloses a coarse-grained soil ultrahigh pressure grain crushing indoor compression test device. The test device comprises a press machine top plate, a press machine base plate, a force transmission block, a work protective cylinder, an ultrahigh pressure rigid compression cylinder, displacement sensors, pore pressure sensors, a lower pore valve, a coarse-grained soil sample, a high pressure cylinder base, porous plates, geotechnical reverse filtering cloths, a leveling mattress, a rigid cushion block, fixed bolts, water stop rings and annular skirt wing plates. According to the invention, an indoor surface vibration compacting instrument or heavy compaction instrument can be employed directly to prepare a unit sample in the ultrahigh pressure rigid compression cylinder, an indoor press machine platform oil circuit can be connected to a load auto-control system and a compression displacement auto-acquisition system to realize load auto-control and data auto-acquisition of ultrahigh pressure grain crushing compression tests, etc. The test device provided by the invention has the advantages of simple and standard sample preparation, convenient and flexible test operation, complete test system data acquisition and improved accuracy, thus having good academic research value and engineering application prospect.

Description

technical field [0001] The invention relates to the technical field of indoor unit body tests of geotechnical engineering, in particular to an indoor compression test device for coarse-grained soil ultra-high pressure particle crushing. Background technique [0002] Modern soil mechanics test research begins to pay attention to the problem of soil particle breakage. Especially for geotechnical structures such as ultra-high earth-rock dams, coarse-grained soil particles, high-stress horizontal crushing, creep and stability issues; particle breakage of soft coarse-grained geotechnical materials and their creep and stability impact mechanisms have become a hot spot in the field of contemporary geotechnical engineering one of the problems. In addition, in the laboratory test study of the inherent compression curve of soil mechanics in the critical state of coarse-grained soil, in the test study of the primary and secondary consolidation coupling mechanism of fluid-solid variabi...

AI Technical Summary

Problems solved by technology

However, the ultra-high pressure compression crushing unit indoor test equipment has not been included in the relevant geotechnical test regulations so far, and the ultra-high pressure particle crushing compression device with a pressure of 100MPa is rarely reported.

The above-mentioned problems exist in the indoor test of soft and fragile coarse-grained soil particle compression crushing, which have not been improved so far.

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