| 印尼某电站基桩的负摩阻力及其措施 |
| |
| 引用本文： | 艾传井.印尼某电站基桩的负摩阻力及其措施[J].地质科技情报,2005,24(Z1):89-92. |
| |
| 作者姓名： | 艾传井 |
| |
| 作者单位： | 中国地质大学研究生院,武汉,430074;中南电力设计院,武汉,430071 |
| |
| 摘 要： | 基于印尼某电站场地的工程地质条件,根据基桩负摩阻力的产生机理,分析确定了中性点的位置,计算了负摩阻力产生的下拉荷载;并结合膨润土泥浆护壁的作用机理,计算了采取较大直径预钻孔和膨润土泥浆护壁的措施后负摩阻力产生的下拉荷载.计算结果表明,前者大于单桩承载力设计值,因此不能采用预应力混凝土管桩方案;后者较前者显著降低,约为单桩承载力设计值的50%,因此可以采用预应力混凝土管桩方案.
|
| 关 键 词： | 电站 负摩阻力 下拉荷载 大直径预钻孔 膨润土泥浆护壁 |
| 文章编号： | 1000-7849(2005)S0-0089-04 |
| 修稿时间： | 2005年3月28日 |
Negative Skin Friction of Foundation Pile and Countermeasure at A Power Station in Indonesia |
| |
| AI Chuan-jing.Negative Skin Friction of Foundation Pile and Countermeasure at A Power Station in Indonesia[J].Geological Science and Technology Information,2005,24(Z1):89-92. |
| |
| Authors: | AI Chuan-jing |
| |
| Abstract: | Based on the engineering geology condition of the power station in Indonesia and the forming mechanism of negative skin friction, the neutral point for skin friction of foundation pile is analyzed and established. The pull-down force is reproduced by negative skin friction and countermeasure is adopted to reduce the negative skin friction. According to the reciprocal-action mechanism between bentonite slurry and soil,the pull-down force is calculated and the countermeasure is adopted by means of pre-borehole and protecting borehole wall. The pre-borehole diameter is big than the pile and the borehole wall is protected by bentonite slurry. It is showed that the former is more than the designed bearing capacity of single pile with a dissatisfactory result using precast concrete spun pile,and the latter is approximatly a half of the designed bearing capacity of single pile with a satisfactory result using the precast concrete spun pile. |
| |
| Keywords: | power station negative skin friction pull-down force big diameter pre-borehole protecting borehole wall by bentonite slurry |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
