With high speed development of underground construction in urban space expasion, more engineering environmental effects has shown up, especially a globe high-attention issuse, land subsidence. Effective measurement and deforamtion prediction in real-time has great significance to reduce maintenance and inspection costs, particularlly in large enginnering practice, such as deep foundation pit, subway tunnel, high-dense building group. Recently, complicated circumstances of artificial ground freezing in cross-passage or cross-river tunnel, large-scale high-speed railways, make the ground movements in soft soil area more difficult. Though the basic theory of deformation is mature for over decades, the application in complicated circumstance is limited and lack references.
Objective: Develop a comprehensive land subsidence controlling system, which involves recently newly complicated engineering issues and propose relevant effective measurements.
Approach: Various laboratory tests and large-scale model experiments for a variety of impact factors; Field monitoring measurement for real-time data collecting. Development of theoretical computation system;
Significant results and potential application: Urban land subsidence effect in soft area caused by high-dense building group has been well studied and the results have already been utilized in Ningbo city and are starting to see significant practical application in Pearl River Delta Region, such as Guangzhou. In addition, the ground deformation around subway tunnel by artificial ground freezing method has also been developed for the further application of subway expansion in more small cities.
Principal leader: Yiqun Tang
Funding: National Science Foundation
Key publications (several representations):
Jie Zhou*, Yiqun Tang, Ping Yang, Xiaohui Zhang, Nianqing Zhou, Jianxiu Wang . Inference of creep mechanism in underground soil loss of karst conduits I. Conceptual model . NATURAL HAZARDS, Volume 62 Issue 3, JUL 2012.
Yi-qun Tang, Jie Zhou*, Jun Hong, Ping Yang, Jian-xiu Wang . Quantitative analysis of the microstructure of Shanghai muddy clay before and after freezing. BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT, Volume 71 Issue 2, MAY 2012.
Yiqun Tang, Xingwei Ren*, Bin Chen, Shoupeng Song, Jian Xiu Wang, Ping Yang . Study on land subsidence under different plot ratios through centrifuge model test in soft-soil territory. ENVIRONMENTAL EARTH SCIENCES, Volume 66 Issue 7, AUG 2012.
Jie Zhou*, Yi-qun Tang, Xiao-hui Zhang, Tian-yu She, Ping Yang, Jian-xiu Wang . The influence of water content on soil erosion in the desertification area of Guizhou, China . CARBONATES AND EVAPORITES, Volume 27 Issue 2 S1, JUN 2012.
Yiqun Tang, Jie Zhou*, Xiaojun He, Ping Yang, Jianxiu Wang . Theoretical and experimental study of consolidation settlement characteristics of hydraulic fill soil in Shanghai . ENVIRONMENTAL EARTH SCIENCES, Volume 67 Issue 5, NOV 2012.
Xingwei Ren, Yiqun Tang*, Yiqing Xu, Yuandong Wang, Xi Zhang, Sha Liu . Study on dynamic response of saturated soft clay under the subway vibration loading I: instantaneous dynamic response . ENVIRONMENTAL EARTH SCIENCES, Volume 64 Issue 7, DEC 2011.
Yi-Qun Tang*, Jie Zhou, Sha Liu, Ping Yang, Jian-Xiu Wang. Test on cyclic creep behavior of mucky clay in Shanghai under step cyclic loading. ENVIRONMENTAL EARTH SCIENCES, Volume 63 Issue 2, MAY 2011.
Yi-Qun Tang*, Zhen-Dong Cui, Xi Zhang, Shu-Kai Zhao . Dynamic response and pore pressure model of the saturated soft clay around the tunnel under vibration loading of Shanghai subway. ENGINEERING GEOLOGY, Volume 98 Issue 3-4, MAY 22 2008.
Monograph:Yiqun Tang, Jie Zhou, Xinwei Ren, Qi Yang, Monograph, Dynamic Response and Deformation Characteristic of Saturated Soft Clay under Subway Vehicle Loading, Springer，2014
