非均匀沙质河床桥梁基础局部冲刷研究综述

A review of the research on local scour of bridge foundation in non-uniform sandy riverbed

桥梁基础局部河床冲刷造成桥墩基础暴露、埋深降低,是导致桥梁基础损毁、承载能力降低、直至桥梁整体破坏的关键因素之一。因工程地质、水文、桥梁结构等差异,桥墩基础冲刷影响因素众多,其中泥沙非均匀性是重要因素之一,对桥梁基础局部冲刷演变产生重要影响。本文从理论公式、冲刷试验、数值模拟三方面着手,概述了非均匀沙质河床下桥梁基础局部冲刷的研究现状和进展,并对相关研究工作进行了思考。

The local riverbed erosion of bridge foundation reduces the exposed buried depth of bridge pier foundation,which is one of the key factors leading to the decrease of bearing capacity of bridge foundation and the whole destruction of bridge.Due to the differences in engineering geology and hydrology of bridge structure,there are many factors affecting the scour of bridge pier foundation, among which the heterogeneity of sediment is one of the important factors,which has an important influence on the local scour evolution of bridge foundation. In this paper,the research status and progress of local scour of bridge foundation under non-uniform sandy riverbed are summarized from three aspects of theoretical formula scour test numerical simulation.