Drum-type guided directional impact device and test method for dynamic test of energy dissipator in rockfall interception system

Abstract

The invention discloses a cylinder type guided directional impact device for a dynamic test of an energy dissipation device in a falling rock intercepting system, and a test method. The cylinder typeguided directional impact device comprises an impact block, lifting equipment, an inhaul cable, a cantilever bracket, a tension sensor, a vertical guide cylinder, a reaction wall and a foundation pit,wherein the reaction wall is vertically arranged on one side of the foundation pit, the lifting equipment pulls the impact block to hover at a certain elevation position in the guide cylinder, and releases the impact block so that the impact block falls along an empty cavity inside the guide cylinder freely and drives the inhaul cable connected thereto. The inhaul cable pulls an energy dissipation device test piece so that the energy dissipation device test piece starts to operate, and required test data is obtained by means of the tension sensor connected with the energy dissipation device test piece. The cylinder type guided directional impact device can be built on the nearby site, the test site is not limited by the on-site environment, the test equipment does not need to be moved toa steep cliff at each test, the cost of each test can be effectively reduced, the working efficiency can be improved, and the cylinder type guided directional impact device can be reused.

Description

technical field [0001] The invention relates to the technical field of slope protection, in particular to a barrel-type guiding and directional impact device for dynamic experiments of energy absorbers in a rockfall interception system. 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] However, the dynamic test of the energy dissipator in the same type of rockfall interception system in foreign countries is basically to use the existing cliff to carry out the impact pressure test, and there is no guiding limit device to guide the impact block. The disadvantage is that the test site is easily affected by the field environment, and the test The site is often far away from the urban area, and the cost of transporting test materials each time is relatively high and takes a lot of time

At the same time, it cannot be guaranteed that all the kinetic energy of the impact block is transmitted to the test piece of the energy dissipator, which brings difficulties to the subsequent force analysis. Because the trajectory of the impact block is not fixed, there are potential safety hazards, which seriously threaten the life safety of the test personnel.

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