A monitoring method for debris flow mechanical parameters and an early warning method for debris flow
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A technology of mechanical parameters and debris flow, which is applied in the field of disaster monitoring and debris flow prevention and control engineering.
Active Publication Date: 2016-09-07
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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This kind of method only considers the link of soil damage in the formation of debris flow, and does not consider the process of coupling the damaged soil and surface water to form debris flow, so it cannot answer the most concerned question of disaster early warning, such as "can soil damage form debris flow? "A series of questions
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Embodiment 1
[0100] Such as Figure 1-1 to Figure 1-6 As shown, a method for monitoring the mechanical parameters of debris flow.
[0101] Step S1, layout monitoring section D
[0102] Picture 1-1 is the elevation map of the debris flow channel; Figure 1-2 It is a schematic diagram of the location of the monitoring section D. In the flow area of the debris flow channel, the monitoring section D is selected at a position where the shape of the channel cross section is regular, the change of channel erosion and silting is small, the channel bed is straight, and the bank slopes on both sides are high and steep.
[0103] Step S2, investigate and determine the background parameters
[0104] On-site investigation to determine the slope I where the monitoring section D is located C =14.1%, monitoring section D width B=30m, debris flow ditch bed roughness n C =0.14, external resistance coefficient m=7.0, maximum safe discharge flow Q of downstream channel p =2400m 3 ·s -1 , the distanc...
Embodiment 2
[0122] A debris flow early warning method realized on the basis of the first embodiment of the debris flow mechanical parameter monitoring method. diagram 2-1 It is the flow chart of debris flow early warning data analysis.
[0123] Step S1 to step S4 are implemented according to the content of the first embodiment.
[0124] Step S5, Early warning of debris flow occurrence scale
[0125] Figure 2-2 It is the flow chart of data early warning processing algorithm. The control center calculates the peak flow Q of the debris flow according to formula 9 in real time c , and according to Q c Maximum safe discharge flow Q with the downstream channel p =2400m 3 ·s -1 The scale of debris flow and the level of early warning can be determined based on the discriminant conditions of inter-time flow.
[0126] At time t-1, V C =8.9m·s -1 , γ c =1.95g·cm -1 , h=6m, then at this time, Q c =1602m 3 ·s -1 , as listed in Table 2, the system issues a yellow alert.
[0127] Step ...
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Abstract
The invention discloses a mud-rock flow mechanical parameter monitoring system and a mud-rock flow early warning system. Aiming at the defects existing in the early warning of debris flow occurrence in the prior art, the present invention firstly provides a monitoring system for mechanical parameters of debris flow. The system uses the total stress monitoring value P obtained on the monitoring section D and the monitoring value h of the debris flow flow depth to calculate and monitor the debris flow severity in real time γ C and average debris flow velocity V C . In the optimized design, the system adjusts the frequency conversion collection and transmission of monitoring data according to the flow depth monitoring value h and the flow depth change value Δh. The invention also provides a mud-rock flow early warning system, which realizes the graded early warning of the mud-rock flow danger according to the peak flow characteristics of the mud-rock flow, and determines the expected time for the mud-rock flow to occur. The debris flow mechanical parameter monitoring system of the present invention can perform real-time and frequency conversion monitoring and transmission of debris flow flow depth, flow velocity, peak flow rate, severity and other characteristic indicators. The mud-rock flow early warning system of the invention can realize the characteristic analysis of the mud-rock flow mechanical parameters and the early warning of the mud-rock flow occurrence.
Description
technical field [0001] The invention relates to a mud-rock flow monitoring method and a mud-rock flow early warning method, in particular to a mud-rock flow monitoring method and a mud-rock flow early warning method which take mud-rock flow mechanical parameters as monitoring values and critical conditions, and belongs to the field of disaster monitoring and mud-rock flow prevention and control engineering. Background technique [0002] Debris flow disaster early warning is to issue early warning information before a debris flow is about to occur or has occurred but has not yet reached the dangerous area, so as to gain time for evacuation and evacuation and reduce casualties. Its core is the scientific monitoring method of debris flow initiation, formation, movement, etc., and the reasonable determination of the critical conditions for disaster occurrence. [0003] Debris flow monitoring and early warning have always been important in the field of debris flow disaster prev...
Claims
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Patent Type & Authority Patents(China)
IPC IPC(8): G01D21/02G06F19/00G08B21/10
Inventor 崔鹏严炎郭晓军葛永刚
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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