Research on the Shallow Buried and Concealed Excavation Construction Technology Used for Lijiayan Reservoir Water Pipeline Crossing the Expressway
The design scheme for the Lijiayan Reservoir Water Pipeline Project crossing the Expressway is shal-low burial and hidden excavation,which avoids the construction of expressways and maintenance of security work.However,shallow burial and hidden excavation is a high-risk engineering project that exceeds a certain scale.The upper part of the shallow buried excavation is the expressway,and its stratum is a gravel layer,which greatly increases the danger of the project and the difficulty of advanced support.The practice shows that the maximum length of the casing hole for the pipe shed in the gravel stratum using a conventional geolog-ical drill is about 35 m.After exceeding 35 m,the success rate drops sharply and the pipe shed is seriously de-flected,which in turn affects the excavation quality of subsequent construction.The method of overlapping ad-vanced pipe sheds in the cave using shallow burial and hidden excavation solves this problem.This paper ex-plains the targeted treatment measures for specific problems,and the goal of"zero settlement"under the expre-ssway is finally achieved.
国家科技期刊平台
NSTL
万方数据
