Water level automatic control system of landslide physical model test

Abstract

A water level automatic control system of a landslide physical model test comprises water tanks, a control cabinet and a slope surface information acquisition device. Two water tanks are respectively arranged at the front and at the back of a landslide physical model test frame. Side faces of the two water tanks, which are contacted with a landslide model, are respectively provided with a plurality of groups of water feeding and discharging holes. Bottoms of the water tanks are connected with water inlet pipelines and water outlet pipelines respectively, water pumps and water inlet electromagnetic valves are arranged on the water inlet pipelines, and water outlet electromagnetic valves are arranged on the water outlet pipelines. Liquid level transmitters for monitoring water levels in the water tanks are arranged in two water tanks, the control cabinet is respectively connected with all the liquid level transmitters, the water pumps, the water inlet electromagnetic valves and the water outlet valves and used for receiving water level signals and controlling opening and closing of the water pumps and the electromagnetic valves, and the slope surface information acquisition device is arranged above the water tank arranged at the front of the landslide physical model test frame. The water level automatic control system of the landslide physical model test can monitor parameters of landslide surface displacement and the like under the condition of stored water level variation precisely and comprehensively and provide an important basis for landslide stability studies.

Description

technical field [0001] The invention belongs to the field of geological disaster model tests, in particular to an automatic water level control system for physical model tests of landslides. Background technique [0002] Due to the needs of reservoir dispatching and operation, the water level of the reservoir has been fluctuating for a long time. The mutual replenishment of the water inside and outside the bank slope of the reservoir makes the internal seepage field change, so the pore water pressure field is also in constant change, which affects the reservoir bank. The stability of slopes often aggravates or even induces landslides. [0003] Overseas, F. O. Jones et al. (1961) investigated and studied the landslides that occurred around Roosevelt Lake from 1941 to 1953. The research results showed that 49% of the landslides occurred in the early stage of water storage from 1941 to 1942, and 30% of the landslides occurred during the sudden water level. The rest are small l...

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Problems solved by technology

[0014] Although the research and development of the water level simulation system or device in the above research results has promoted the development of landslide physical model tests to a certain extent, the analysis of the above water level simulation systems or devices found that there are certain limitations or defects:

[0015] (1) The traditional landslide physical model device considering the effect of reservoir water generally sets the seepage boundary at the rear of the landslide body as the constant head boundary condition, which is inconsistent with the seepage field characteristics of the actual landslide change;

[0016] (2) To simulate the groundwater level inside the landslide, a Malploy tube water supply system is installed at the trailing edge of the landslide to control the recharge water level at the trailing edge of the landslide according to the position and height of the Malploy tube. Although it has the function of controlling the water level or providing a stable flow, However, it cannot dynamically simulate the groundwater level at different stages of the landslide in real time;

[0017] (3) During the simulation of reservoir water level rise and fall, the degree of automation of water level control is low, and the testers need to continuously adjust and control the water level during the test, which is a huge workload. It is difficult to maintain a stable water level and realize dynamic adjustment of the water level;

[0018] (4) In the traditional test, the landslide physical model needs to be powered by a hydraulic jack. The control system is complex and the operation is cumbersome. Generally, additional design and production of the counter force device are required, the design is complicated, and the cost of the test is high;

[0019] (5) In the traditional test, the information of the slope table of the landslide model is generally collected by ordinary digital camera method, but the accuracy of ordinary digital camera is low, it is difficult to reflect the local subtle deformation of the landslide surface, and it is not possible to reproduce the development and destruction of the landslide in three dimensions. The deformation of the slope surface during the process; on the other hand, due to the reflection of the water surface, the displacement data of the slide body section below the water level cannot be collected by ordinary digital camera methods, and the data of the wading part of the landslide is missing, which will affect the impact of the reservoir water level. Evolutionary process analysis; moreover, the image acquisition efficiency of ordinary digital camera method is low, the image processing is difficult, and it takes a lot of time to organize data

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