Semi-automatic multifunctional soil test sample compaction device

Abstract

The invention discloses a semi-automatic multifunctional soil test sample compaction device which comprises a bracket system, a power and control system, a model forming system and a sample compaction system, wherein the bracket system comprises a base, a side column and a top plate; the lower end of the side column is fixed on the base; the top plate is fixedly arranged at the upper end of the side column; the power and control system is arranged on the base; the model forming system is arranged on the power and control system; the sample compaction system is fixedly arranged on the top plate; the corresponding model forming system and the sample compaction system are selected to be arranged on a movable sample compaction platform and the top plate; a soil sample with a certain mass is put into the gap between an inner model forming cylinder and an outer model forming cylinder (or is put into the model forming cylinder) according to the corresponding test specification; then a displacement controller is operated to control a hydraulic system, so that the movable sample compaction platform ascends to a preset height, meanwhile, a sample compaction hammer goes deep into the model forming cylinder, soil particles on each layer are layered and compacted according to the required dry density, namely a remolded hollow cylindrical sample (or a solid cylindrical sample) is obtained.

Description

technical field [0001] The invention belongs to the technical field of indoor geotechnical test equipment, and in particular relates to a semi-automatic multifunctional geotechnical test sample pressing device. Background technique [0002] The preparation of remodeled samples is a major difficulty in indoor geotechnical tests, especially for dynamic hollow cylinder torsional shear instruments: 1) The compaction method relies on manual control in the control of story height and compaction work, Moreover, the compaction effect produces a non-negligible secondary disturbance to the soil, causing cracks to appear inside the sample, which greatly reduces the credibility of subsequent tests; 2) Due to the low permeability coefficient of cohesive soil, drainage and consolidation are extremely slow, When using the consolidation method to prepare samples, it needs to be consolidated under high negative pressure for more than 10 days, which makes the sample preparation equipment expe...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a semi-automatic multifunctional geotechnical test sample pressing device, which solves the problems of single function of sample preparation equipment, low degree of automation, poor sample preparation accuracy and inability to prepare hollow cylindrical samples in the prior art

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