Stability alarming for a pile plate retaining wall with damage

doi:10.16265/j.cnki.issn1003-3033.2020.02.008

Abstract

Abstract: In order to investigate stability alarming method for damaged retaining walls, firstly, mechanical condition of retaining wall-soil system and relationships between earth pressure and wall stability as well as coefficient of subgrade reaction to soil were analyzed. Secondly, a damage alarming index, ERVC, was proposed based on wavelet packet frequency band energy spectrum analysis. Then, intrinsic connection among ERVC, earth pressure and stability of retaining walls was analyzed, and a stability alarming method for retaining walls with damage was put forward, namely, stability of walls being alarmed via ERVC. Finally, with a pile plate retaining wall as an example, a simplified mechanical model and finite element model of wall-soil system were established, and by updating parameters of the model, a standard model was obtained to verify proposed alarming method. The results show that with increase of ERVC value, wall stability decreases and it will enter critical stable state when ERVC reaches threshold value.

Key words: retaining wall, stability alarming, earth pressure, damage alarming index, energy ratio variation coefficient (ERVC), standard finite element model

CLC Number:

X928.03

XU Qian, YANG Chao, GUO Hong, GUO Guangling. Stability alarming for a pile plate retaining wall with damage[J]. China Safety Science Journal, 2020, 30(2): 47-53.

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