| 南京长江四桥南锚碇基坑渗流控制方案研究 |
| |
| 引用本文： | 肖利,王连新,潘霄,张家发.南京长江四桥南锚碇基坑渗流控制方案研究[J].长江科学院院报,2009,26(Z1). |
| |
| 作者姓名： | 肖利 王连新 潘霄 张家发 |
| |
| 作者单位： | 1. 长江科学院,水利部岩土力学与工程重点试验室,武汉,430010
2. 长江勘测规划设计研究院,武汉,430010 |
| |
| 基金项目： | 国家"十一五"科技支撑计划 |
| |
| 摘 要： | 南京长江第四大桥南锚碇基础采用井筒式地连墙结构形式,地连墙嵌入中风化层约3m,下部可能形成沉渣层,且强风化层裂隙较多,局部透水性较好,地下水可能通过沉渣层及裂隙绕渗进入基坑.建立三维模型模拟基坑渗流场,通过参数敏感性分析和方案对比表明:中风化层厚度及渗透性对基坑的渗流量及渗透稳定性有明显影响;基岩无灌浆帷幕条件下,地连墙底面沉渣层渗透比降过大,可能引发渗透变形问题;对基岩进行帷幕灌浆后,可有效减小基坑渗流量,使基坑渗透稳定性得到保障.
|
| 关 键 词： | 南京长江第四大桥 南锚碇 渗流场 地连墙 |
Study on Seepage Control Scheme for Foundation Pit of South Anchorage of 4th Nanjing Yangtze River Bridge |
| |
| XIAO Li,WANG Lian-xin,PAN Xiao,ZHANG Jia-fa.Study on Seepage Control Scheme for Foundation Pit of South Anchorage of 4th Nanjing Yangtze River Bridge[J].Journal of Yangtze River Scientific Research Institute,2009,26(Z1). |
| |
| Authors: | XIAO Li WANG Lian-xin PAN Xiao ZHANG Jia-fa |
| |
| Affiliation: | XIAO Li~1,WANG Lian-xin~2,PAN Xiao~2,ZHANG Jia-fa~1 (1.Yangtze River Scientific Research Institute,2.Changjiang Institute of Survey,Planning,Design , Research) |
| |
| Abstract: | The foundation pit for the south anchorage of 4th Nanjing Yangtze River Bridge is protected with concrete diaphragm wall.The wall will be embedded in the medium-weathered layer with 3 meters.Because the dredging layer at the wall bottom and the strongly weathered rock are more permeable than the wall,under-ground water may flow through the dredging layer to the foundation pit.On the basis of numerical simulation with 3D seepage field model,the permeability sensitivity is analyzed and the seepage control eff... |
| |
| Keywords: | Fourth Najiang Yangtze River Bridge south anchorage seepage field concrete diaphragm wall |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
