STUDY OF FEEDBACK ANALYSIS AND SAFETY CONTROL OF LARGE-SECTION TUNNEL EXCAVATION UNDER INTENSIVE BUILDINGS
YANG Ping1，2，QIN Weimin3，YANG Yu4，WANG Tao5
(1. Faculty of Engineering，China University of Geosciences，Wuhan，Hubei 430074，China；2. China Soilbase Engineering Co.，Ltd.，Beijing 100022，China；3. State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China；4. China Xiamen Road and Bridge Construction Group Co.，Ltd.，Xiamen，Fujian 361026，China；5. Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources，Yangtze River Scientific Research Institute，Wuhan，Hubei 430010，China)
Abstract：Wucun tunnel underpasses intensive buildings with high-risk characteristics such as ultra-shallow，large-span，complex construction process，high-protection demand on buildings in Xiamen City，and dynamic feedback analysis method is carried out during tunnel construction process in complex geological and environmental conditions. The monitoring measures for the safe construction of the tunnel mainly include building settlement，surface subsidence，building inclination，the tunnel vault subsidence，tunnel adjacent formation restraining，the soil body depth portion displacement，the soil body lamination subsidence，blasting vibration，subsoil water level and so on，especially static level sensor is applied to the important buildings for automatic monitoring. In accordance with ISO9001 quality certification system，a sound and efficient operation system is established in the feedback analysis process. Based on construction experience of city tunnel and the results of preliminary researches in Wucun tunnel，monitoring is carried out on the surrounding environment as well as on tunnel structure itself. In addition to routine monitoring tools，advanced technology such as automatic monitoring on differential settlement of buildings，monitoring information management and prediction systems，monitoring information feedback by LAN and WAN，early-warning facilities by desktop alarm systems and electronic display boards，are applied to dynamic feedback analysis throughout tunnel construction；so that the feedback analysis work has distinctive informationizing characteristics in Wucun tunnel engineering.
杨平,覃卫民，杨育，王涛. 密集建筑群下大断面隧道施工反馈分析及安全性控制研究[J]. 岩石力学与工程学报, 2010, 29(04): 795-803.
YANG Ping1，2，QIN Weimin3，YANG Yu4，WANG Tao5. STUDY OF FEEDBACK ANALYSIS AND SAFETY CONTROL OF LARGE-SECTION TUNNEL EXCAVATION UNDER INTENSIVE BUILDINGS. , 2010, 29(04): 795-803.
