Double-switch rockfall early warning device

Abstract

The invention discloses a double-switch rockfall early warning device. The double-switch rockfall early warning device comprises a plurality of supporting columns which are vertically arranged side byside, a base is hinged to the bottom of each supporting column, the upper parts of the supporting columns are connected with pull anchor rods through upward pulling anchor ropes, second switch sensors and second buffer springs are arranged on the upward pulling anchor ropes, supporting ropes sequentially penetrate through the multiple supporting columns, the multiple supporting ropes are sequentially arranged on the supporting columns side by side from top to bottom, two fixing bases are arranged on extension lines of the two sides of the supporting columns arranged side by side correspondingly, the two ends of the supporting ropes are connected to the two fixing bases correspondingly, first switch sensors and first buffer springs are arranged on the supporting ropes, and the double-switch rockfall early warning device further comprises early warning device bodies. According to the double-switch rockfall early warning device, after falling rocks collide with the device, the tension ofthe supporting ropes and the tension of the upward pulling anchor ropes can be monitored through the first switch sensors and second switch sensors, and then passing pedestrians or vehicles are reminded through the early warning device bodies; and the whole structure is simple, the cost is low, and the performance is reliable.

Description

technical field [0001] The invention relates to the field of slope protection, in particular to a double-switch rockfall early warning device. Background technique [0002] my country is one of the countries with the most serious geological disasters and the most threatened population in the world. In the past decade or so, earthquakes have occurred frequently in my country, including the Wenchuan earthquake in 2008, the Yushu earthquake in Qinghai in 2010, and the Yibin earthquake in Sichuan in 2019. A large number of material sources, along with the rapid construction of roads and railways, the increasing number of mountainous towns, and the rapid development of mountainous eco-tourism, have led to more and more serious safety problems caused by landslides and rockfall disasters. The data shows that the number of deaths caused by small-volume landslides and lone rocks exceeds 100 people every year, and they are sudden, not regular, and difficult to predict. Therefore, the ...

AI Technical Summary

Problems solved by technology

[0007] By directly arranging sensors on the dangerous rock mass, such as rod-type displacement meters, accelerometers, inclinometers, etc., by monitoring the development and changes of cracks in the dangerous rock mass, the start-up of the dangerous rock mass, and the angle rotation of the dangerous rock mass, further predict the dangerous rock mass. Although this method can achieve good early warning, it has the disadvantages of poor construction environment and many unsafe factors, and the construction of dangerous rock mass itself is an acceleration of the original dangerous rock mass. damage; and it is difficult to solve the contradiction of "monitoring without avalanche, and avalanche without monitoring", and the monitoring of all dangerous rock masses that may collapse has the disadvantages of high cost and difficult construction; especially in the alpine canyon area, the Three Gorges Reservoir In harsh and harsh environments such as urban areas, there are insufficient power supplies and poor signal transmission problems for sensor acquisition terminals and data transmission relay stations, and there is no better solution

[0008] The early warning of rockfall is realized by installing sensors on each mechanism of the passive network. One is to install an inclination sensor on the column, and the early warning can be realized by monitoring the inclination angle of the column, which can realize automatic early warning, but there are still the following deficiencies: affected by external factors such as wind, animals, Human influence is great, misjudgment is prone to occur, and monitoring reliability is low

The second is to install tension, vibration, and bending sensors on the anchor rope and the upper support rope, and determine the occurrence of rockfall by monitoring the tension, vibration of the anchor rope of the protective net, or the curvature of the upper support rope, which has the advantages of strong anti-interference and long service life. , but there are still the following deficiencies: the signal demodulation system is complex and expensive; the fiber grating sensor is easily damaged, and the maintenance is difficult and costly

At present, this method still monitors the change of a certain physical quantity in the passive network as an early warning indicator, the monitoring variables are incomplete, and the false positive rate is high; and the sensor data transmission method is mostly based on the operator network and the power consumption is high. Difficult to promote in areas without signal

[0009] Rockfall monitoring is carried out through non-contact methods such as radar ranging and speed measurement, video decoding, etc., to realize rockfall monitoring and early warning, which has the advantages of high equipment safety factor and long service life, but there are still the following disadvantages: large power consumption, power supply requirements High; noisy, low reliability, large amount of data

[0010] In general, the above detection technologies all have the contradiction between high reliability and low cost, and the difficulty of installation.

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