印尼某防浪堤地震液化综合判定及影响研究

Liquefaction discrimination effect research of breakwater in Indonesian

选取印尼某防浪堤为研究对象,基于国标法、Seed法、神经网络法与EERC法分析砂土的液化潜势,并预测液化引起的侧向滑移与震陷。结果表明:对于砂土而言,采用四种方法得到的液化潜势评估结果基本一致;15 m内现状细砂层在500 a一遇地震作用下将产生液化;砂土发生液化时,防浪堤的主要破坏形式包括侧向错移和震陷,最大错移量不大于3 m,最大震陷量不超过50 cm;8级地震发生后,防浪堤使用功能可能受到一定程度影响或部分功能丧失,但不会发生完全丧失使用功能的破坏。

A breakwater in Indonesia is selected as the research object,the sand liquefaction potential is analyzed based on the China code method,the Seed method,the neural network method and the EERC method,and the lateral slip and seismic subsidence caused by liquefaction are predicted.The results shows that the liquefaction potential evaluation results obtained by the above four methods are consistent for sand.The current fine sand layer within 15m will liquefy under the action of a 500-year earthquake.Furthermore,the empirical formula is used to predict that,the main failure modes of the breakwater include lateral displacement and seismic subsidence when the sand is liquefied.The maximum displacement is not more than 3.0 m,and the maximum seismic subsidence is not more than 50 cm.Studies have shown that the use of the breakwater may be affected to a certain extent or partially lost,but the destruction of the total loss of use will not occur.