1. College of Civil Engineering, Tongji University, Shanghai, China;
2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai, China;
3. Key Lab of Environment Protection & Safety in Foundation Engineering of Transportation, China Communication Construction Company Ltd., Guangzhou, China;
4. Key Laboratory of Land Subsidence Monitoring, Prevention and Control of Ministry of Land and Resources, Shanghai Institute of Geological Survey, Shanghai, China