Coefficient Analysis of Soft Soil Consolidation Based on Measurement of Stratified Settlement

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• 作者：Pingyuan Yang ; Jiasheng Zhang ; Huihua Hu…
• 关键词：Drainage consolidation ; Stratified settlement ; Vertical consolidation ; Coefficient of horizontal consolidation ; Back analysis
• 刊名：Geotechnical and Geological Engineering
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：34
• 期：1
• 页码：383-390
• 全文大小：528 KB
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• 作者单位：Pingyuan Yang (1) (2)
  Jiasheng Zhang (1)
  Huihua Hu (2)
  Xiaoen Wu (1) (3)
  Xianfa Cao (4)
  Yi Chang (5)
  Yufei Liu (1)
  Jin Xu (1) (6)
  
  1. School of Civil Engineering, Central South University, Changsha, 410075, China
  2. Hunan Provincial Communications Planning Survey and Design Institute, Changsha, 410008, China
  3. China Energy Engineering Group Equipment Co., Ltd, Beijing, 100007, China
  4. College of Civil Engineering and Architecture, Guilin University of Technology, Guilin, 541004, China
  5. School of Civil and Architecture Engineering, East China University of Technology, Nanchang, 330013, China
  6. China International Engineering Consulting Corporation, Beijing, 100048, China
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Geotechnical Engineering
  Hydrogeology
  Terrestrial Pollution
  Waste Management and Waste Technology
  Civil Engineering
  
• 出版者：Springer Netherlands
• ISSN：1573-1529

文摘

The coefficient of consolidation is an important parameter for calculating and predicting the consolidation settlement of soft soil. In this study, a back analysis method for the coefficient of consolidation is established based on field monitoring results of stratified settlement; the method can calculate both the coefficients of vertical consolidation, c _v , and horizontal consolidation, c _h , of soft soil at different moments. This new method overcomes the problems of traditional methods, which can calculate only one coefficient at a time. The use of the proposed method to determine c _v and c _h for the drainage consolidation of a thick layer of soft soil can compensate for the drawbacks of laboratory testing, which include insufficient consideration of the environmental factors affecting field consolidation, the distortion of experimental results with changes in these factors, and the inability to reasonably determine c _h for soil layers. The new method is theoretically rigorous and reasonable as well as practically feasible in engineering. It is reasonable to use the coefficients of consolidation, back-calculated from the settlement observation data of earlier loading levels (not including the first level of loading), as parameters for consolidation prediction in later stages. In preloading drainage consolidation fields of soft soil, which are structurally strong and where obtaining suitable soil samples is difficult, it is necessary to set a certain number of stratified settlement observation points and use the back analysis of the field monitoring results of stratified settlement to determine the coefficient of soft soil consolidation. Keywords Drainage consolidation Stratified settlement Vertical consolidation Coefficient of horizontal consolidation Back analysis