Device for studying cracking-degree-variable multi-effect coupled critical collapse test

Abstract

The invention relates to a device for studying the cracking-degree-variable multi-effect coupled critical collapse test to realize the study on the karst ground collapse test under the conditions different cracking degrees and hydrodynamic forces, determine the critical condition of the collapse of the test model and establish the collapse evaluation benchmark scale. The device comprises a groundwater latent erosion simulation system, a cracking degree control system, a raining simulation system and a real-time monitoring system. The groundwater latent erosion simulation system is a box with an groove shaped like the Chinese character hui and an upper-end opening structure, the inner groove and the outer groove of the groundwater latent erosion simulation system are communicated by small dense holes, and the bottom of the inner groove is provided with a crack; the cracking degree control system covers the lower end opening of the crack and comprises a movable cover plate and an adjusting mechanism; the raining simulation system is fixed above the end opening of the inner groove; and the real-time monitoring system comprises a camera and a monitoring computer, wherein the camera is arranged in the key position of the model, and the monitoring computer is connected with the camera.

Description

technical field [0001] The invention relates to a research device for crack opening variable multi-effect coupling critical collapse test, which is used for the prevention and treatment of karst ground subsidence in karst-covered karst areas, and obtains reference standards for risk analysis and treatment effect detection of karst ground subsidence under the same conditions. . Background technique [0002] Karst is widespread in my country, and geological disasters based on differential dissolution of soluble rocks occur frequently, and disaster losses caused by foundation collapse of railways, highways, and buildings remain high every year. With the rapid development of my country's high-speed railway, the damage caused by karst ground subsidence has also increased sharply. Due to the complexity and concealment of karst morphological development and the many factors affecting karst ground subsidence, it is difficult to carry out field experiments and tests as a means of sy...

AI Technical Summary

Problems solved by technology

In order to shorten the test period, the crack openings simulated by the test are usually relatively large, and the research conclusions mainly focus on whether a certain soil collapses under the condition of vertical water infiltration and the duration, but it cannot answer the minimum karst crack opening. The problem of collapsing or not under combined conditions with hydrodynamic forces (and others)—Critical conditions for collapsing

Therefore, it is impossible to establish a benchmark scale for collapse evaluation in practical applications

[0004] For the prevention and treatment of karst ground subsidence, the critical condition is not only the benchmark for the design analysis and judgment of whether the remediation is necessary, but also the evaluation scale for whether the remediation purpose is achieved. However, due to the complexity and concealment of overlying karst dissolution fissures, the site generally does not have ideal conditions. Therefore, through the analysis of a large number of subsidence cases, it is the only way to carry out the research on karst ground subsidence system by constructing an ideal reciprocating indoor test research system with parameters that can be accurately monitored.

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