群桩局部冲刷深度估算方法研究综述

Review of Local Scour Depth Estimation Methods around Pile Groups

由于经济和地质条件等原因,群桩在结构设计中越来越多。冲刷作为桥梁破坏的主要原因,可造成严重的破坏并对环境安全造成极大威胁,因此,预测冲刷深度是桥梁设计的必要步骤。目前关于不同参数对于群桩冲刷深度影响的研究很少,对前人相关试验研究和试验结果以及冲刷深度的估算方法进行了系统研究,考虑冲刷深度线上剩余土体的有利作用,将局部冲刷等效为整体冲刷,给出等效深度计算方法,可为设计提供一定的借鉴。

The pile group received wider applications in the bridge design industry.Scour is one of the major failure mode of the bridge failures and it might results in large economical and life loss of the public.As a result,the scour depth prediction is critical to the bridge design.Currently,very few research on the influence factors on the scour depth are available.This paper presents a comprehensive review on the scour depth researches,test results and estimation methods.It is proposed that the residual soil above the local scour line is favorable to the scour depth reduction.A local scour depth estimation method is recommended by relating the local scour to the contraction scour.