洋山深水港区深厚吹填砂地基工后沉降分析.pdfVIP

第 25 卷 增 2 岩石力学与工程学报 Vol.25 Supp.2 2006 年 10 月 Chinese Journal of Rock Mechanics and Engineering Oct.，2006 洋山深水港区深厚吹填砂地基工后沉降分析 李玉岐，周 健，孔祥利 ( 同济大学 地下建筑与工程系，上海 200092) 摘要：采用规范沉降计算法和一维固结理论相结合的方法对洋山深水港区一期工程深厚吹填砂陆域地基的沉降进 行计算分析，并基于地基分层沉降的实测资料，采用反分析方法，确定陆域地基各土层的压缩模量和固结系数等 参数，对洋山深水港区深厚吹填砂陆域地基的工后沉降进行预测。研究结果表明，在洋山深水港区的大部分分层 沉降观测点处，处理吹填砂层的工后沉降都小于 60 mm，而未处理吹填砂层和下卧层的总工后沉降量都小于 300 mm ；港区地基的工后沉降主要是由未处理吹填砂层和下卧层的压缩引起的，其占总工后沉降的 80.90%～88.19%。 该研究可为今后其他重大深水港工程的设计和施工提供参考。 关键词：港口工程；深厚吹填砂地基；反分析；工后沉降 中图分类号：U 655 文献标识码：A 文章编号：1000 –6915(2006)增 2 –4071 –05 ANALYSIS OF POST-CONSTRUCTION SETTLEMENT OF THICK BACKFILL SAND FOUNDATION IN YANGSHAN DEEPWATER SEAPORT LI Yuqi ，ZHOU Jian ，KONG Xiangli (Department of Geotechnical Engineering ，Tongji University，Shanghai 200092 ，China) Abstract ：The settlement of thick backfill sand foundation in phase I of Yangshan deepwater seaport project is calculated by specification and one-dimensional consolidation theory. Based on layered settlement data measured in field，compressibility modulus and consolidation coefficient of soil layers are obtained by back analysis method ，and thus the post-construction settlement of the foundation is predicted. It is demonstrated that the post-construction settlements of the treated backfill sands at almost all the sequence settlement measurement points of Yangshan deepwater seaport are all less than 60 mm，those of untreated backfill sand and subsoil are all less than 300 mm ，and that the post-construction settlement is mostly caused by the compression of the untreated backfill sand and subsoil ，which consists of 80.90%～88.19%