管幕隧道法在引水工程下穿高速公路的应用

王宏宇

摘要:

随着地下工程大量修建,下穿既有运营高速公路时有发生,保证既有高速公路正常运营和安全尤为重要。本文以管幕隧道法引水工程下穿高速公路为背景,对管幕隧道工程设计和施工方案进行阐述,并运用MIDAS/GTS NX有限元数值软件,对管幕隧道法下穿高速公路段进行路基沉降分析。分析可知,管幕隧道法可有效控制开挖过程中路基沉降,确保高速公路运营安全,为类似下穿工程提供有益参考。

Abstract:

SWith the construction of a large number of underground projects, underpassing of existing operating expressways occurs from time to time, and it is particularly important to ensure the normal operation and safety of existing highways. This paper presents a design scheme for pipe-curtain method tunnel water diversion project underpasses the expressway subgrade section. The design scheme and construction key points of tube curtain tunnel engineering are elaborated and MIDAS/GTS NX numerical software is used to simulate the whole process of underpassing highway. The settlement of deformation of subgrade section are analyzed. Deformation of subgrade section of Highway underpass by Pipe-Curtain Method can be effectively controlled and the safety of Highway operation can be ensured.