Method for measuring and calculating under-dam scouring maximum depth of window dam and application

A technology of maximum depth and window, which is applied in the design of debris flow and sand dams, and in the field of debris flow prevention and control engineering structures. It can solve the problems of limiting the actual reference value and inconsistency of the measurement results, and achieve the effect of simple parameter value and simple calculation process.

Pending Publication Date: 2022-05-06
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This means that if the form / condition of the opening (hole) is not considered when measuring the scour depth under the dam, the calculation principle may be inconsistent with the actual control principle of the dam, which limits the actual reference value of the measurement results in engineering

Method used

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  • Method for measuring and calculating under-dam scouring maximum depth of window dam and application
  • Method for measuring and calculating under-dam scouring maximum depth of window dam and application
  • Method for measuring and calculating under-dam scouring maximum depth of window dam and application

Examples

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Embodiment 1

[0031] In the design of a window dam, the method of the invention is used to calculate the maximum scouring depth h under a window dam d 。

[0032] A debris flow gully is located in Wenchuan County, Aba Tibetan and Qiang Autonomous Prefecture, Sichuan Province. It is a first-class tributary on the right bank of Minjiang River. The drainage area of the gully is 54.26km 2 The longitudinal length of the main ditch is 15.74km, and the average longitudinal ratio of the main ditch bed is 201 ‰. The plane shape of the basin is in the shape of "leaves". The upper reaches of the gully are narrow, mostly in the shape of "V", the middle and lower reaches are wide and gentle, in the shape of "U", with local width and width alternating. The mountains in the gully area are high and steep, and the longitudinal slope of the gully is large, which is conducive to the collection of rainfall and provides a foundation for the outbreak of debris flow. The national highway G213 and Duwen expressway proj...

Embodiment 2

[0044] The method of the invention is used to check the maximum scouring depth h under a window dam d 。

[0045] A debris flow gully is located in group 4, Xiaba village, Puji Town, Puge County, Liangshan Prefecture, Sichuan Province. The drainage area of the gully is 23.30km 2 The longitudinal length of the main ditch is 10.47km, and the average longitudinal ratio of the main ditch bed is 195 ‰. The overall shape of the basin is in the shape of "leaves". The mountain in the gully area is high and the slope is steep, and the longitudinal slope of the gully is large. The gully area is rich in debris flow deposits. There are many collapse points and loose slope deposits on both sides of the gully area, which provides material source conditions for the outbreak of debris flow. Goukou is a typical minority village. A large-scale debris flow broke out in the gully, which washed away the highway at the gully mouth and blocked the river, posing a serious threat to the villages at the gul...

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Abstract

The invention discloses a method for measuring and calculating the maximum scouring depth under a window dam and application. Aiming at the defect that the influence of a window dam opening form on the under-dam scouring depth is not considered in the prior art, the invention provides a method for measuring and calculating the under-dam scouring maximum depth of a window dam, and the under-dam scouring maximum depth of the window dam is measured and calculated according to basic data obtained by window dam field investigation and a scientific calculation formula. According to the measuring and calculating method, the opening form of the window dam serves as an influence factor, essentially, different dynamic process characteristics, caused by different opening forms, of debris flow crossing the dam and scouring serve as constraint conditions for measuring and calculating the scouring depth, and it is guaranteed that the structural significance of the large opening characteristic of the window dam is fully reflected in the measuring and calculating principle of the maximum scouring depth. The calculation process is simple and convenient, the influence rule of each parameter on the calculation result can be reflected, and a more reliable basis can be provided for window dam design. The invention further provides an application scheme of the measuring and calculating method in window dam design, a window dam prevention and control engineering system and safety evaluation.

Description

technical field [0001] The invention relates to the construction technology of debris flow prevention and control engineering, in particular to a design method of debris flow sand retaining dam and its application, belonging to the technical field of debris flow disaster prevention and control engineering and architectural engineering design. Background technology [0002] Sand retaining dam is the key control project to regulate the movement of debris flow. With its functional characteristics of sand blocking and throttling, reducing the power of debris flow, raising the erosion surface of local gully bed, controlling the gravity erosion of gully and increasing the stability of gully bed, as well as the technical characteristics of economic cost, low construction technical requirements and rapid project effect, sand blocking dam is widely used in debris flow disaster prevention and control, and has become the most important means of debris flow prevention and control engineering...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F111/04G06F119/14
CPCG06F30/20G06F2119/14G06F2111/04
Inventor 游勇吕小波王壮柳金峰孙昊赵万玉
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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