兰西高速黄土区涵洞稳定状态及病害成因分析研究

The Steady State and Cause Analysis on Diseases of Loess Culvert in Lanzhou-Xining Highway

涵洞病害是高速公路在黄土区域中的典型病害之一。对兰西高速公路在穿越黄土区域中的涵洞病害进行了实地调研,基于此总结了黄土地区公路涵洞出现的7种典型病害类型,即为涵洞下沉、基础开裂、护锥翼墙沉降开裂或倾斜错位、涵节错位或填缝脱落、内部或进出口积水淤塞、涵背填土塌陷、涵顶路面开裂等,分析了其基本特征,并从黄土工程特性深化认识、设计与施工中考虑微地貌形态、日常管理与维护3个方面对涵洞病害成因进行了分析。该研究成果可以进一步加深对黄土区涵洞病害机理的认识,对黄土地区高速公路涵洞病害的防治、勘察、设计和施工提供理论指导和科学依据。

Culvert disease is one of the typical diseases of highways in tive types and basic characteristics of loess culvert diseases are summarized through spot investigation ofLanzhou-Xining Highway in this paper. The types of culvert disease in loess area mainly include culvert sinking , foundation fissure , subsidence cracking or dislocation of wing wall , culvert section mismatch or caulking falling off , internal water silting , lateral water silting , filling collapse behind culvert , pavementcracking on the top of culvert. Meanwhile , causes of culvert disease are analyzed combined with deepe-ning the understanding of loess engineering characteristics , considering the misign and construction , daily management and maintenance. The investigation results of this paper could further promote the understanding of diseases mechanism of culvert in loess region , and provide theoreti-cal guidance and scientific basis for loess culvert disease prevention , investigation , design and construc-tion.