上海港某矿石堆场深厚软土地基加固设计研究
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(1 同济大学岩土及地下工程教育部重点试验室,上海 200092; 2 同济大学地下建筑与工程系,上海 200092; 3 中交水运规划设计院,北京 100007)[摘要]结合上海港某大型矿石堆场工程,针对上部覆盖有一定厚度饱和疏松无粘性土的深厚软土地基,将新型整体式热熔塑料排水板引入到软土加固中,利用堆场运营时堆放的矿石荷载,提出了“浅层处理、矿石分级加载、自动监测和使用期调整”的分步地基加固设计思路及相应的具体设计参数,并推广应用到实际工程中。实测结果表明,加固获得了较好的工程效果。[关键词]矿石堆场;分级加载;深厚软土;地基加固Design of deep soft soil improvement of ore terminals in Shanghai PortJia Mincai1,2, Zhou Jian1,2, Wu Jian3(1 Key Lab.of Geotechnical and Underground Eng.of Ministry of Education; 2 Department of Geotechnical Eng.,Tongji Univ.,Shanghai 200092, China; 3 China Communications Planning & Design Institute for Water Transportation, Beijing 100007, China)Abstract:In combination with the construction of large-scale ore terminals in Shanghai Port, the paper advances a new design concept as well as its corresponding design parameters to improve the soft ground, which is composed of saturated loose cohesionless soil in the upper and deep soft soil in the lower. The design spirits are incarnated by densifying upper cohesionless soil, step loading, Auto-monitoring and adjusting in service period by introducing integrated thermal-melt wick drain to ground improvement. The measurement results prove that the method is feasible and effective.Keywords:ore terminals;step loading;deep soft soil;ground improvement作者简介:贾敏才,博士,Email: mincai-jia@tongji.edu.cn。参考文献[1]地-基处理手册编写委员会. 地基处理手册(第二版)[M]. 北京:中国建筑工业出版社,2000.[2]MITCHELL J K. Soil improvement:state-of-the-art report[C]∥Proceedings of the 10th international conference on soil mechanics and foundation engineering. Stockholm:A.A. Balkema,1981.[3]JGJ79—2002建筑地基处理技术规范[S]. 北京:中国计划出版社,2002.[4]周健,贾敏才,池永. 无填料振冲法加固粉细砂地基试验研究及应用[J]. 岩石力学与工程学报,2003,22(8):1350-1355.[5]周健,曹宇,贾敏才,等. 强夯-降水联合加固饱和软粘土地基试验研究[J]. 岩土力学,2003,24(3):376-380.[6]金小荣,俞建霖,龚晓南,等. 含承压水软基真空联合堆载预压加固试验研究[J]. 岩土工程学报,2007,29(5):789-794.[7]解光河,王中筑,李杰,等. 真空预压法在处理工业厂房地基中的应用[J]. 建筑结构,2007,37(3):94-96.[8]蔡来炳. 福州地区水泥土搅拌桩复合地基承载特性的研究[J]. 建筑结构,2003,33(3):7-9.[9]周健,贾敏才. 分离式塑料排水板与整体热熔塑料排水板的排水性能试验研究报告[R]. 上海:同济大学,2005.