山地城市复杂地质条件下综合管廊岩土工程设计

Geotechnical Engineering Design of Utility Tunnel under Complex Geological Conditions in Mountain City of Chongqing

摘要:

以重庆市九龙坡区科学大道综合管廊工程为研究对象，系统分析山地城市复杂地质条件下综合管廊岩土工程设计的关键技术及工程实践方法。基于项目实证，重点阐述了软弱地基、邻近既有建构筑物、深基坑及高填方等典型地质环境中的基坑支护技术、地基处理措施及河道穿越施工方案，进而提出适应山区城市复杂地质特征的综合管廊设计与施工优化策略。通过工程案例解析，系统阐述了该工程在结构体系优化、防水系统设计、地基处理技术及安全防护体系等方面的创新实践，为类似地质条件下市政基础设施的建设提供了重要工程参考。

Abstract:

Taking the Chongqing Jiulongpo District Kexue Avenue Utility Tunnel Project as the research object, the key technologies and engineering practice methods of geotechnical engineering design of utility tunnel under the complex geological conditions in mountain cities are systematically analyzed. Based on the project demonstration, the focus is on expounding the foundation pit supporting technology, foundation treatment measures and river crossing construction scheme in typical geological environments such as soft foundation, adjacent existing structures and buildings, deep foundation pits and high fills, and then the design and construction optimization strategy of utility tunnel adapted to the complex geological characteristics of mountain cities is put forward. Through the analysis of engineering cases, the innovative practice of the project in structural system optimization, waterproof system design, foundation treatment technology and safety protection system is systematically expounded, which provides an important engineering reference for the construction of municipal infrastructures under similar geological conditions.