城市地下工程建设与运营安全控制理论与方法

开发地下空间是解决城市发展与土地稀缺矛盾的主要出路。虽然我国城市地下空间大规模开发利用从上世纪90年代开始，但在地下空间的建设与运营过程中仍面临诸多问题，相关工程事故时有发生。本项目以有效结合地铁建设，安全开发城市地下空间为背景，通过材料试验、物理模型试验、数值仿真和理论研究相结合的方法，以城市地下结构中最典型、体量最大的盾构隧道为主要研究对象，开展城市地下空间开发涉及的岩土力学关键科学问题、地下结构性能状态评价关键力学问题、地层扰动和长期温度循环作用下的地下结构-地层相互作用规律、地下结构安全控制方法等方面的研究，揭示施工扰动和环境变化影响下的盾构隧道性能演化规律，建立分级安全控制标准，探明适用于不同环境和条件下的地下结构体系加固方法，从而为城市地下空间的安全开发和地下轨道交通的安全运营提供重要支撑。

Underground space is major solution to the conflicts between urban development and land deficiency. In China, the construction and operation in underground space face many problems and related accidents often occur, despite the extensive utilization and exploration of underground space began in 1990s. As typical and massive construction structure in underground space, shield tunnel is the main research object in this project. On the background of the safe development of urban underground space and effectively combining with the subway construction, this project uses material experiments, model tests, numerical simulations and theory research to investigate the key problems in soil & rock mechanics, the crucial mechanical issues related to the evaluation of underground structure performance, the law of underground structure-stratum interaction under long-term temperature variations, the safety standard and control methods of underground structure. The goal of this project is to reveal the evolution law of performance of shield tunnel under the effect of construction disturbance and the surroundings changes, to establish the hierarchical safety control standard and verify the suitable strengthening methods of underground structure system for different surroundings and circumstances. Consequently, the important support for the safe development of urban underground space and the safe operation of underground rail transit will be provided.