A rope-guided directional impact device for dynamic testing of energy absorbers in rockfall protection systems

Abstract

The invention discloses a rope type guided directional impact device for a dynamic test of an energy dissipater of a rock fall protection system. The device comprises a test block, lifting equipment,a pulling cable, counterforce piles, force sensors, test specimens of the energy dissipater of the rock fall protection system, directional ropes and a foundation pit. The test block is used for rockfall simulation; the lifting equipment is used for lifting and releasing the test block; the pulling cable is used for transferring impact force; the counterforce piles are used for mounting the testspecimens of the energy dissipater of the rock fall protection system; the force sensors are used for data acquisition; the directional ropes are used for guiding the test specimens; the foundation pit is used for providing a buffer space for an impact test and plays a role in protection; the counterforce piles are vertically arranged on two sides of the foundation pit. The device can be constructed at a nearby site, a test site is not limited by an onsite environment, carrying testing equipment to a steep cliff in each-time testing is avoided, and accordingly each-time testing cost can be effectively reduced, operating efficiency is improved, and reusability is realized.

Description

technical field [0001] The invention relates to the technical field of slope protection, in particular to a rope-type guiding and directional impact device used for dynamic experiments of energy absorbers of rockfall protection systems. Background technique [0002] my country's terrain is high in the west and low in the east, distributed in a ladder shape. The terrain is complex and diverse, and the mountainous area is vast. The terrain in the west is mainly mountains, basins, and plateaus. The Qinghai-Tibet Plateau has many permafrost landforms. With the change of global climate, our country has become one of the countries with the most serious geological disasters. In response to geological disasters such as falling rocks and landslides, scholars and engineers have proposed a variety of countermeasures and methods, among which passive flexible protection is a widely used protection technology. The anti-performance of the energy absorber of the protection system determine...

AI Technical Summary

Problems solved by technology

The anti-performance of the energy absorber of the protection system determines the quality of the protection effect, but the domestic test device for detecting the performance of the energy absorber of the rockfall protection system is still in the pseudo-static stage, which cannot reflect the influence of the dynamic effect on the energy absorber. Therefore, it is particularly important to conduct rockfall impact tests. How to simulate the process of the energy dissipator of the rockfall protection system, so that the test has a foothold. If this technical problem cannot be effectively solved, the dynamic detection test cannot be carried out

[0003] The dynamic test of the energy dissipator of the same type of rockfall protection system in foreign countries basically uses the existing cliff to carry out the impact pressure test, and there is no guiding limit device for guiding the impact test block. The disadvantage is that the test site is easily affected by the site environment, and the test site It is often far away from the urban area, and the cost of transporting test materials each time is relatively high, and it takes a lot of time

At the same time, it cannot be guaranteed that the centroid of the impact test block and the cable that transmits the impact force are in the same plane, resulting in the unfixed movement track of the impact test block during the impact process, which poses a safety hazard and seriously threatens the life safety of the test personnel.

At the same time, it brings difficulties to the subsequent force analysis, which is not conducive to analytical calculation

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