Indoor rainfall simulation experiment device

Abstract

The invention relates to an indoor rainfall simulation experiment device. In the field of geotechnical engineering, an experiment device which is suitable for simulating a minitype pile reinforced expansive soil landslide test under various rainfall conditions is not available yet. The indoor rainfall simulation experiment device comprises a rainfall path control system and a water supply system, wherein the rainfall path control system comprises a main transmission device and an auxiliary transmission device; the main transmission device comprises a rectangular fixed frame; a screw rod is vertically arranged on a group of opposite frames of the fixed frame; the auxiliary transmission device comprises a fixed bearing plate which is provided with a ball screw; a sliding table of the ball screw is provided with a rainfall spray head; the fixed bearing plate is vertically fixed under the screw rod by a ball screw nut; a stepping motor is controlled by the path preset by a computer, so that the rainfall spray head can move along the specified path in the XOY plane. The indoor rainfall simulation experiment device can simulate various rainfall paths, can be used for adjusting the rainfall intensity to achieve even rainfall, and can complete the automatic online acquisition of the rainfall capacity and the rainfall time.

Description

technical field [0001] The invention relates to a simulation device in the fields of geotechnical engineering and mechanical engineering, in particular to an indoor simulated rainfall test device. Background technique [0002] The safety and ecological environment problems caused by expansive soil landslides have become a hot issue in engineering safety in southern Shaanxi today. Micro-pile slope protection uses micro-piles to reinforce expansive soil landslides, which have the advantages of simple construction and low cost. In the process of evaluating the influence of micropiles on the stability of expansive soil landslides, relevant technical parameters must be obtained through experiments. Since the landslides to be reinforced are generally located in remote mountainous areas, it is difficult to have on-site test conditions, which leads to high costs, difficult tests, and long test periods during the on-site test and monitoring process, and can only reflect specific rai...

AI Technical Summary

Problems solved by technology

Since the landslides to be reinforced are generally located in remote mountainous areas, it is difficult to have on-site test conditions, which leads to high costs, difficult tests, and long test periods during the on-site test and monitoring process, and can only reflect specific rainfall conditions at a specific time The change process of the stress field and displacement field of the expansive soil by the micropile cannot reflect the dynamic change of the micropile’s influence on the expansive soil under different rainfall conditions, and cannot meet the needs of actual engineering, so similar simulations are carried out in the laboratory test becomes necessary

At present, the nozzles of indoor rainfall simulation equipment are mostly fixed at a specific position, and the nozzles cannot be moved according to a certain path according to the needs of the test, which seriously restricts the development and optimization of the stability evaluation model describing the expansive soil landslide under different rainfall paths. Accuracy of Micropiles Layout Scheme

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