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A method for determining the risk of dam failure of concrete gravity dams

A measurement method and concrete technology, which is applied in the direction of machine/structural component testing, measuring devices, instruments, etc., can solve problems such as concrete component damage, gravity-type dangerous dam damage, and detection of structural damage

Active Publication Date: 2021-03-26
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the existing detection methods for concrete dams can be divided into destructive testing technology and non-destructive testing technology: destructive testing technology will cause certain damage to the detection structure, such as pulling out method, core drilling sampling method, etc., such methods Its characteristic is to obtain the actual ability to resist damage by local damage to concrete components, and it is intuitive and reliable, and the test results are easy to be accepted by people; its disadvantage is that it will cause local damage to concrete components, and secondary repairs are required after testing. It is not suitable for the detection of large-area concrete components, so this method will cause a certain degree of structural damage to gravity-type dangerous dams, so this method is generally not used

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  • A method for determining the risk of dam failure of concrete gravity dams
  • A method for determining the risk of dam failure of concrete gravity dams
  • A method for determining the risk of dam failure of concrete gravity dams

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Embodiment Construction

[0071] The principles and features of the present invention are described below, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0072] In order to illustrate the present invention better, the monitoring of gravity type dangerous dam failure risk is carried out below with certain gravity type dam in Jiangyou City, Sichuan Province as an example, to prove its practical significance and value. The dam is a concrete gravity dam with a maximum dam height of 120.14m, a crest elevation of 660.14m, a crest length of 72m, and a total storage capacity of 5.72×108m3. The 5.12 Wenchuan earthquake of magnitude 8.0 caused varying degrees of damage to the dam body , appearing as many as 90 cracks.

[0073] The basic steps are as follows:

[0074] Step 1: Determination of the main measurement parameters of the dam

[0075] Select ten concrete test blocks whose side length is 150mm in the upper, middl...

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Abstract

The present invention relates to a concrete gravity dangerous dam and dam break risk measurement method, belonging to the field of water conservancy projects. The method comprises the steps of: employing a sound wave tomography detection technology to perform detection of a concrete gravity dangerous dam, namely employing the sound wave tomography technology to perform comprehensive detection of the dangerous dam, determining the worst dangerous section of a dam body, providing and establishing a dynamic modulus parameter for power measurement and stability evaluation of concrete gravity dangerous dam and dam break risks on this basis, utilizing the parameter to monitor the worst dangerous section change rule of the gravity-type dangerous dam in a condition of reservoir water level change,and utilizing a unit power damaging rate and a unit time damaging rata to comprehensively evaluate and analyze the change rule of the dynamic modulus of the dangerous section so as to evaluate and predict the dynamic stability and endurance of the concrete gravity dangerous dam.

Description

technical field [0001] The invention relates to a method for measuring the risk of dam break of a concrete gravity critical dam, which belongs to the field of hydraulic engineering. Background technique [0002] With the rapid development of my country's construction industry and the continuous acceleration of urbanization, concrete has become one of the most important structural materials in civil engineering fields such as national infrastructure, transportation, and water conservancy. In my country, the amount of concrete used is as high as billions of cubic meters, and it is widely used in roads, housing construction, bridges and national defense construction. However, concrete is usually used in complex environments. During the service of concrete, chemical erosion, external loads, and natural conditions (temperature cycle changes, freezing) and other factors often cause cumulative damage and damage to concrete projects. Serious In some cases, it may even lead to catas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M99/00G01N29/04
CPCG01M99/00G01N29/043
Inventor 贺可强王世通郭璐
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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