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Method for inverting dam foundation restrained deformation based on dam in-situ displacement monitoring data

A displacement monitoring and rigid body displacement technology, applied in measuring devices, special data processing applications, instruments, etc., can solve problems such as difficulty in actual measurement and complex mechanical properties of dam foundations

Active Publication Date: 2017-07-18
HOHAI UNIV
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  • Application Information

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Problems solved by technology

And due to the small number of measuring points, the conclusions obtained may have certain randomness
[0006] The mechanical properties of the dam foundation are complex and difficult to measure. Therefore, it is necessary to explore a reasonable way to accurately represent the effect of the dam foundation on the dam

Method used

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  • Method for inverting dam foundation restrained deformation based on dam in-situ displacement monitoring data
  • Method for inverting dam foundation restrained deformation based on dam in-situ displacement monitoring data
  • Method for inverting dam foundation restrained deformation based on dam in-situ displacement monitoring data

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Embodiment Construction

[0035]This embodiment provides a method for retrieving the constrained deformation of the dam foundation based on the in-situ displacement monitoring data of the dam body, including the following steps:

[0036] Step (1): Simplify the action of the foundation on the dam body as distributed or centralized constraints acting on the bottom of the dam body, thereby establishing a centralized or distributed constraint mechanical model of the dam-foundation interaction.

[0037] Among them, the constraint mechanics model is specifically: the dam foundation is composed of the dam body, the foundation and the contact interface between the dam body and the foundation, and the constraint force increment is Δf i ={Δf xi Δf yi Δm i} T ,i=1,2,...,n, where, Δf xi is the i-th constraint reaction increment in the horizontal direction, Δf yi is the i-th constraint reaction force increment in the vertical direction, Δm i is the i-th constraint reaction moment increment, n is the number ...

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Abstract

The invention discloses a method for inverting dam foundation restrained deformation based on dam in-situ displacement monitoring data. The method is characterized in that a novel dam-dam foundation interaction mechanical model is provided; the action on a dam body is simplified into the distributive restraining or concentrated restraining (including unknown restraining counter-force and unknown displacement) on the bottom of the dam body according to the model; a method for distinguishing between finite element and block interfacial element and hybrid-solving is carried out to directly invert to obtain the restrained deformation of a dam foundation; on that basis, a finite element algorithm is adopted to count to obtain the displacement value of each point of the dam body, and thus the safe running state of the dam can be reasonably evaluated.

Description

technical field [0001] The invention relates to water conservancy projects, in particular to a method for retrieving constrained deformation of a dam foundation based on in-situ displacement monitoring data of a dam body. Background technique [0002] The main task of dam safety monitoring is to grasp the working performance of the dam in real time, guide the construction and feedback design in time, so as to achieve the purpose of reducing the risk of the dam during operation and ensure the safe operation of the dam. Generally, projects such as environmental quantity, deformation, seepage, stress and strain, temperature and special monitoring should be arranged in and around the dam. The response to the safety behavior of the dam structure is the result of the synergy of multiple factors. It is necessary to extract the main factors affecting the safety behavior of the dam from a large amount of monitoring data in a timely and effective manner, and analyze its development tr...

Claims

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Application Information

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IPC IPC(8): G06F17/50G01B21/02
CPCG01B21/02G06F30/23G06F2111/10G06F2119/06
Inventor 李同春林潮宁鲁晓刘晓青齐慧君赵梦瑶宋思露张圣
Owner HOHAI UNIV
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