title: A case study on stratified settlement and rebound characteristics due to dewatering in Shanghai subway station.
abstract: Based on the Yishan Metro Station Project of Shanghai Metro Line number 9, a centrifugal model test was conducted to investigate the behavior of stratified settlement and rebound (SSR) of Shanghai soft clay caused by dewatering in deep subway station pit. The soil model was composed of three layers, and the dewatering process was simulated by self-invention of decompressing devise. The results indicate that SSR occurs when the decompression was carried out, and only negative rebound was found in sandy clay, but both positive and negative rebound occurred in the silty clay, and the absolute value of rebound in sandy clay was larger than in silty clay, and the mechanism of SSR was discussed with mechanical sandwich model, and it was found that the load and cohesive force of different soils was the main source of different responses when decompressed.
authors.affiliation: Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China. jianxiu wang@yeah.net
authors.forename: Jianxiu
authors.initials: J
authors.lastname: Wang
authors.forename: Tianrong
authors.initials: T
authors.lastname: Huang
authors.forename: Dongchang
authors.initials: D
authors.lastname: Sui
mesh_terms: D000268:Adhesiveness; D000538:Aluminum Silicates / Q000737:chemistry*; D002681:China; D000077215:Clay; D019245:Compressive Strength; D008422:Materials Testing; D012822:Silicon Dioxide / Q000737:chemistry*; D013314:Stress, Mechanical; D014186:Transportation; D014867:Water / Q000737:chemistry*
chemical_list: D000538:Aluminum Silicates; D014867:Water; D012822:Silicon Dioxide; D000077215:Clay