Analysis and information construction of Pukou deep foundation pit of Nanjing Yangtze River tunnel
WANG Yuan1,2,LIU Song-yu1,TAN Yue-hu2,DUAN Jian-li2,ZENG Jing2,LI Er-bing2
1.Institute of Geotechnical Engineering,Southeast University,Nanjing 210096,China;2.Engineering Institute of Engineering Corps,PLA University of Science and Technology,Nanjing 210007,China
Abstract： Taking the deep excavation engineering at Pukou of Nanjing Yangtze River tunnel as an example,the measures for the safety monitoring and information construction of deep foundation pit are introduced.Different types of monitoring sections are designed based on different maintenance structures.The monitoring content includes settlement and displacement,bottom heave in foundation,ground water level,internal force of piles and slurry walls,support axial force,water pressure and earth pressure,etc.Based on construction conditions,the monitoring data of leading path segment,hiding building segment,shield originating working well and engineering circumference circumstance are analyzed.The analytical results show that the support system force is improved by lowering the ground water level outside the deep foundation pit,but the surrounding circumstance is greatly affected by large-scale lowering of ground water.The deformation and internal force of supporting structure are interrelated with the support setting and construction conditions.The monitoring feedback results duly guide the construction of deep excavation.The experience and conclusions can be the reference for the design,construction and researches of similar projects.
王源;刘松玉;谭跃虎;段建立;曾京;李二兵; . 南京长江隧道浦口深基坑信息化施工与分析[J]. 岩土工程学报, 2009, 31(11): 1784-1791.
WANG Yuan1,2,LIU Song-yu1,TAN Yue-hu2,DUAN Jian-li2,ZENG Jing2,LI Er-bing2. Analysis and information construction of Pukou deep foundation pit of Nanjing Yangtze River tunnel . Chinese J. Geot. Eng., 2009, 31(11): 1784-1791.
