Study On Automatic Monitoring And Early Warning System Of Debris Flow Along Railway Line In Mountainous Area

Debris flow disaster threatened mountain railway line’s operation safety, cause huge economic loss to the railway. Mountain railway line is generally pass through remote, harsh environment of the mountain area. It is difficult to get the precursory information about the debris flow disaster. It is also lack of physical model to support. And, the early warning model is disjointed with the real time information of disaster. It makes difficult to early warn the debris flow disaster, also the accuracy is low. The study is on the basis of concluding the latest research results about the debris flow, it breaks through the single factor prediction model which mainly depends on the rainfall information, it increases the information about the depth of the rainfall infiltration in the place where the debris flow occurs, the channel mud information, the secondary information and so on, it studies the disaster information monitoring and transmission technology of related factors, aims at developing the related monitoring instrument, and develops the data network monitoring system which can monitor, transport, converge the warning and disaster information on debris flow disaster stably and reliably in the harsh environment, then use the system engineering method to develop the debris flow early warning system which is best combined by hardware and software resource. The warning system is based on the data network about the real-time disaster information monitoring and the debris flow early warning model. It makes the debris flow disaster early-warning system base on the stable sources of information. The research of the debris flow monitoring and warning system along the mountain railway line made the following results for the debris flow warning in the several aspects:(1)It analyzes the formation mechanism and motion process characteristics of the storm debris flow along the mountain railway line and how to determine the methods of mud-position, and it builds the early warning method of mud-position which based on the railway bridge flow capacity, the landslide in debris flow channel and the blocking outburst factors of the blocking part, on the basis it develops the pole mud-bit count of the mudslides and its early warning mechanism that can fit debris flow valleys along the mountain railway with harsh natural conditions.(2) It discusses during the rainfall course the starting conditions on the source land of the storm debris flow along the mountain railway, determine the proper method to measure critical depth of rainfall infiltration from the unstable soil and its applicable conditions, the creation is on the basis of the early warning mechanism of the debris flow disaster which is about the critical depth of rainfall infiltration on the soil of the debris flow source, bases on above aspects, we develop a gauge about soil rainfall infiltration depth, it can be qualitatively and semi-quantitative to monitor the water content of the debris flow source of land and its distribution with depth, then, we can get the information about the process about rainwater penetrate the soil and the water distribution on the soil in the debris flow area.(3)It discusses the acoustic characteristics of debris flow in detail, it developed the Infrasound monitoring instrument which can alarm and simultaneously record signal process of infrasound monitoring for along mountainous railway line debris flow.(4)It builds the early warning method of mud-position which based on the railway bridge flow capacity, the landslide in debris flow channel and the blocking outburst factors of the blocking part, on the basis it develops the pole mud-bit count of the mudslides and its early warning mechanism that can fit debris flow valleys along the mountain railway with harsh natural conditions.(5)Based on the key parameters of debris flow rainfall, ground soil depth of rainfall infiltration, infrasound, debris flow gully mud-position, It establishes the disaster early warning index critical value, disaster early warning process and information issuance mode of the debris flow disaster in along railway line in mountainous areas. The paper apply for system engineering and Integration of debris flow rainfall information monitoring, Mud-position Monitoring, soil monitoring the information of source depth of rainfall infiltration of debris flow information monitoring, infrasound monitoring etc. information monitoring technology, The study designs and development to adapt to the harsh environment of a mountainous area wireless debris flow monitoring and early warning network system, this system can real-time collect and bringing together of debris flow Valley debris flow of information and the disaster information, and base on the monitoring information data acquisition of system, the debris flow disaster early warning system of mountainous railway line can alarm the Nearby past train and people of the debris flow disaster.(6) The research result has applied for field testing at CHUANFANFGOU of CHENGKUN Railway line TONGZILING quarry spoil ground, The testing result on-site proved the debris flow disaster early warning system is feasible and reliable and the accuracy of debris flow forecasting can be improved by monitoring rainfall information, the rainfall penetration depth of soil in debris flow source, mud-position, infrasound monitor. Monitoring and warning system in debris flow disaster early warning research has broad development prospect.