Partitioning and grading early warning method for rainfall-induced landslide along highway in mountainous area
A technology along highways and along the road, applied in the direction of rainfall/precipitation gauges, measuring devices, meteorology, etc., can solve the problems of lack and inaccuracy, achieve high rationality, improve accuracy, and reduce calculation costs
Pending Publication Date: 2022-03-25
山东高速集团四川乐宜公路有限公司 +2
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Based on the characteristics of the study area, it may be inaccurate to obtain a regional threshold using traditional empirical methods, and there are few studies on highway rainfall threshold estimation and meteorological early warning, and there is a lack of attempts in this area
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[0056] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.
[0057] Aiming at the technical problems of this application, this application proposes a zonal early warning method for rainfall-induced landslides along mountainous expressways through the following embodiments, aiming at carrying out rainfall threshold estimation and meteorological early warning of rainfall-induced landslides along highways, and providing safe operation of expressways. provide assurance.
[0058] refer to figure 1 , shows a flow chart of the steps of a ...
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Abstract
The invention discloses a zoning and grading early warning method for rainfall-induced landslide along a mountainous area expressway, and relates to the technical field of landslide disaster early warning, and the method comprises the steps: simulating the change of transient pore water pressure of each grid unit in a research region where rainfall easily induces landslide along the expressway in a rainfall infiltration process through a TRIGRS model; the stability of each grid unit is calculated; secondly, taking grid units as evaluation units, and establishing a mathematical function relationship between the average rainfall intensity I and the rainfall duration D and the stability of each evaluation unit by utilizing a TRIGRS model, so as to reduce the calculation cost of searching a rainfall I-D threshold value and improve the precision of solving the rainfall threshold value; then, the rainfall I-D threshold value of each grid unit in the research area is solved, and spatial distribution of the rainfall I-D threshold values is obtained; and finally, on the basis of the rainfall threshold spatial distribution diagram, in combination with real-time rainfall data, a three-level meteorological early warning scheme of the research area is established, and a guarantee is provided for safe operation of the expressway.
Description
technical field [0001] The application relates to the technical field of landslide disaster early warning, in particular to a method for zoning and grading early warning of landslides induced by rainfall along highways in mountainous areas. Background technique [0002] Landslide is a common and common natural phenomenon, but due to the lack of an effective early warning system, it has caused a large number of casualties and huge property losses all over the world. Among the many triggering factors, rainfall is the most important factor inducing landslides. Therefore, it has become one of the most commonly used methods to establish a meteorological early warning program for the study area using rainfall thresholds (defined as rainfall conditions that may reach or exceed landslides). In order to ensure the safety of important linear projects such as expressways during operation, it is of great theoretical and practical significance to carry out research on rainfall threshold...
Claims
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IPC IPC(8): G01N33/24G01W1/14
CPCG01N33/24G01W1/14Y02A90/10
Inventor 董营营赵爱国姜玉杰姜广伦南骁聪张永选杨森席利飞徐传昶唐捷薛继雷王育奎
Owner 山东高速集团四川乐宜公路有限公司