施工顺序影响沉管隧道基础灌砂模型试验  

Model Experiment on the Impact of Filling Sand Construction Sequence on Immersed Tunnel Foundation

作　　者：万超 周恩先 吴刚[2] 沈永芳[2] 吕振纲 Wan Chao;Zhou Enxian;Wu Gang;Shen Yongfang;Lü Zhenliang(Nanchang Municipal Engineering Development Group Co. Ltd. Nanchang 330029,P.R. China;Institute of Ocean Underwater Engineering,Shanghai Jiaotong University,Shanghai 200231,P.R. China;Shanghai Zhenhua Heary Industries Co. Ltd., Shanghai 200125,P.R. China;Nanchang Municipal Public Investment Holding Co. Ltd.,Nanchang 330029,P.R. China)

机构地区：[1]南昌市政工程开发集团有限公司,南昌330029 [2]上海交通大学海洋水下工程科学研究院,上海200231 [3]上海振华重工(集团)股份有限公司,上海200125 [4]南昌市政公用投资控股有限责任公司,南昌330029

出　　处：《地下空间与工程学报》2018年第6期1618-1624,共7页Chinese Journal of Underground Space and Engineering

基　　金：上海市自然科学基金(15ZR1423300)

摘　　要：基础灌砂是沉管隧道工程施工中常用的基础处理方法。为了解决沉管隧道基础灌砂施工顺序的问题,通过对等比例灌砂模型灌砂实时观测试验,探讨了不同灌砂施工顺序对底板压力及砂积盘扩散的影响。研究表明:不同的灌砂顺序,对于灌砂效果有着明显的影响。先灌砂对后灌砂在特定方向上具有影响;后灌砂时,灌砂效果受先灌砂的影响,灌砂时间大大缩短,后灌砂会造成已灌砂完成的区域底板压力增大。Filling sand method is one of the main construction method of foundation treatment in immersed tunnel engineering. In order to solve the problem of filling sand construction sequence,based on the real-time observation of filling sand in the equivalence ratio model test,the influence of filling sand construction sequence on the bottom pressure and the diffusion of sand deposit was discussed. Research shows that filling sand construction sequence has a corresponding influence on foundation treatment. Early stage filling sand construction influences the late stage filling sand construction in a particular direction. Because of the early filling sand construction,the time of late stage filling sand construction is greatly reduced. Late stage filling sand will lead to the floor pressure increase in the completed filling sand area.

关 键 词：沉管隧道 基础灌砂 施工顺序 监测试验 

分 类 号：U456.3[建筑科学—桥梁与隧道工程]