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| 长芯劲性桩桩侧摩阻力计算方法探讨* | |
| 引用本文： | 陈华顺,孙元奎,李挺.长芯劲性桩桩侧摩阻力计算方法探讨*[J].水运工程,2011(5):40-44. |
| 作者姓名： | 陈华顺 孙元奎 李挺 |
| 作者单位： | 1. 上海市岩土地质研究院有限公司,上海,200072 2. 河海大学岩土工程研究所,江苏南京,210098 3. 上海地矿工程勘察有限公司,上海,200072 |
| 基金项目： | 浙江省交通厅科技计划项目 |
| 摘 要： | 基于双层模式分析了长芯劲性桩的荷载传递机理.预应力管桩同心植入大直径双向水泥土搅拌桩时形成"水泥土塞",利用圆孔扩张理论模拟了管桩沉桩对桩侧地基土的扰动,给出水泥土塞完全闭塞前后桩土接触面处径向应力,针对下部芯桩,以桩土接触面处地基土的抗剪强度计算桩侧摩阻力.结合实体工程,分别按该方法和规范公式分段落计算了桩侧摩阻力,并与由实测桩身轴力换算得到的桩侧摩阻力对比分析,得出的公式在淤泥质土中与规范比较吻合,在粉质黏土中相对偏小,受上覆荷载及数据采集方式的影响,实测值明显小于计算值. |
| 关 键 词： | 长芯劲性桩 双层模式 水泥土塞 圆孔扩张理论 桩侧摩阻力 |
Calculation method for side friction of stiffened piles with long core pile |
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| CHEN Hua-shun,SUN Yuan-kui,LI Ting.Calculation method for side friction of stiffened piles with long core pile[J].Port & Waterway Engineering,2011(5):40-44. | |
| Authors: | CHEN Hua-shun SUN Yuan-kui LI Ting |
| Institution: | CHEN Hua-shun1,SUN Yuan-kui2,LI Ting3(1.Shanghai Geotechnical Engineering & Geology Institute Co.Ltd.,Shanghai 200072,China,2.Geotechnical Research Institute,Hohai University,Nanjing 210098,3.Shanghai Geological & Mineral Eengineering Investigation Co.Ltd.,China) |
| Abstract: | Based on the bi-level,the load transfer mechanism of stiffened piles with long core pile was analyzed.Thecement-soil plug was formed when a PHC pipe pile was implanted into bi-direction cement mixing pile in a concentric manner.The theory of cavity expansion was adopted for analyzing the disturbance on the side soil,and the radial stresses of pile-soil contact surface before and after the complete occlusion of cement soil plug were calculated.Considering the shear strength,the calculation equation for side ... |
| Keywords: | stiffened piles with long core pile bi-level model cement soil plug theory of cavity expansion side friction of pile |
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