Patent ID: 11859365
Assignee: ZHEJIANG UNIVERSITY OF TECHNOLOGY
Field: Civil engineering (Other fields)
Classification: CPC E  H | IPC E  H

Claim 12:
13. A scour depth evaluating method of the system for bridge scour multi-source monitoring according to claim 3, comprising the following steps:
carrying out dynamic weight selection in consideration of an analytic hierarchy process to select dynamic weight of the intelligent monitoring system as a target hierarchy, take a water flow velocity, a water depth, a silt grain size, a suspended matter concentration, an environmental vibration magnitude and an external scour environment as a criterion hierarchy, and take the three subsystems of the intelligent monitoring system as a project hierarchy so as to form a structural model for multi-hierarchy intelligent monitoring system dynamic weight selection, constructing a judgment matrix and carrying out the steps of single hierarchical arrangement and consistency check thereof as well as total hierarchical arrangement and consistency check thereof, and carrying out real-time analysis on dynamic weight selection of the intelligent monitoring system for bridge pile foundation scour to obtain dynamic weights λ1, λ2, λ3 of the high-frequency real-time bridge dynamic characteristic monitoring system, the adjustable sound velocity underwater depth monitoring system and the scoured seabed soil pressure change testing system, wherein since all the monitoring data of the three subsystems are finally conversed into scour depth values, all the weights are normalized according to the following formulas:, a
      1
    
    =
    
      
        λ
        1
      
      ⁢
      
        /
      
      ⁢
      
        (
        
          
            λ
            1
          
          +
          
            λ
            2
          
          +
          
            λ
            3
          
        
        )
      
    
  

  
    
      a
      2
    
    =
    
      
        λ
        2
      
      ⁢
      
        /
      
      ⁢
      
        (
        
          
            λ
            1
          
          +
          
            λ
            2
          
          +
          
            λ
            3
          
        
        )
      
    
  

  
    
      a
      3
    
    =
    
      
        λ
        3
      
      ⁢
      
        /
      
      ⁢
      
        (
        
          
            λ
            1
          
          +
          
            λ
            2
          
          +
          
            λ
            3
          
        
        )
      
    
  

carrying out multi-source data fusion on actual bridge scour depths in accordance with the result of weight normalization:, y
    b
  
  =
  
    
      
        a
        1
      
      ⁢
      
        y
        1
      
    
    +
    
      
        a
        2
      
      ⁢
      
        y
        2
      
    
    +
    
      
        a
        3
      
      ⁢
      
        y
        3
      
    
  

wherein yb is a scour depth through multi-source monitoring data fusion, a1, a2, a3 are normalized dynamic values of the high-frequency real-time bridge dynamic characteristic monitoring system, the adjustable sound velocity underwater depth monitoring system and the scoured seabed soil pressure change testing system, and y1, y2, y3 are scour depths obtained through respective conversion of the high-frequency real-time bridge dynamic characteristic monitoring system, the adjustable sound velocity underwater depth monitoring system and the scoured seabed soil pressure change testing system.