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Method for evaluating hazard of land subsidence

A technology of land subsidence and evaluation methods, applied in the field of surveying, can solve the problems of not paying attention to the research of multi-hazard comprehensive hazard evaluation, and having few hazard evaluation theories

Inactive Publication Date: 2014-09-03
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Judging from the current literature, most of the domestic and foreign studies on geological disaster hazard assessment theory are limited to landslides, debris flows and other disasters, and do not pay attention to the comprehensive hazard assessment research of multi-hazards. There are also fewer hazard assessment theories

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  • Method for evaluating hazard of land subsidence
  • Method for evaluating hazard of land subsidence
  • Method for evaluating hazard of land subsidence

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Embodiment Construction

[0037] The technical solution of the present invention will be described in detail below with reference to the drawings and embodiments.

[0038] A method for evaluating the hazards of land subsidence in this embodiment specifically includes the following steps:

[0039] (1) Select the land subsidence hazard evaluation index and establish the original evaluation index matrix U,

[0040] U = 1 1 2 3 2 2 2 1 2 2 3 3 2 2 ...

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Abstract

The invention discloses a method for evaluating the hazard of land subsidence. The method comprises the following steps that different indexes are selected to form a land subsidence hazard evaluation index system, normalization processing is carried out on all the indexes, the hazard rating of each evaluation index is built according to expert knowledge, the hazard ratings of the evaluation indexes form a matrix V, an AHP is utilized for calculating subjective weight, an entropy weight formula of land subsidence hazard evaluation is built, the objective weight of each index is calculated through entropy weight, comprehensive weight is calculated based on the AHP and the entropy weight, a weighted standardized matrix of the evaluation indexes is constructed, a positive ideal solution and a negative ideal solution are determined, the relative close degree is calculated, and the hazard rating of the land subsidence is evaluated according to the relative close degree. The method has certain practical application value and universality.

Description

technical field [0001] The invention relates to the field of surveying, in particular to a land subsidence hazard evaluation method. Background technique [0002] Land subsidence is an environmental geological phenomenon in which the regional ground elevation is lowered due to the compression of the surface soil of the earth's crust. It has the characteristics of slow generation, long duration, wide range of influence, and is difficult to recover once formed. It is a geological disaster that threatens resource utilization, environmental protection, economic development, urban construction and people's lives. [0003] The hazard of land subsidence refers to the destructive impact of subsidence disasters on all aspects of the city. Its hazard assessment aims to determine the intensity, density, probability of occurrence of settlement activities, and the location and scope of possible hazards based on extensive and in-depth surveys, and to provide basic information for assessi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 岳建平顾景强王庆曾宝庆刘斌梁子亮
Owner HOHAI UNIV
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