双排长短组合桩与常见双排桩的对比研究

申永江; 杨明; 项正良

doi:10.11779/CJGE2015S2020

双排长短组合桩与常见双排桩的对比研究 English Version

中南大学土木工程学院,湖南长沙 410075

基金项目: 国家自然科学基金项目（41102171）; 中国铁路总公司科技研究开发计划项目（2013T001）; 中国博士后科学基金项目（2012M521556）

详细信息

作者简介:
申永江(1979- ),男,讲师,主要从事边坡防治技术研究工作。

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出版历程
- 收稿日期: 2015-03-25
- 发布日期: 2015-07-24

Comparative study on double-row piles with different lengths several common anti-slide piles

School of Civil Engineering, Central South University, Changsha 410075, China

摘要

摘要: 针对双排抗滑桩前、后排桩受力与变形差异较大,前、后排抗滑桩无法充分发挥抗滑作用以及沉埋式抗滑桩因沉埋深度过大可能引起越顶破坏的问题,提出了双排长短组合抗滑桩的支护形式。建立有限元模型,分析了后排桩在不同沉埋深度时,前、后排桩桩身最大弯矩和剪力的变化情况。计算结果表明：当后排桩沉埋到一定深度时,前、后排桩桩身最大弯矩、剪力及变形程度均较接近,并以此深度为后排桩的设计沉埋深度。在此基础上,与几种常见的抗滑桩进行对比发现,双排长短组合桩能够有效地调节前后排桩的内力与变形,充分发挥前后排桩的抗滑作用,并且桩身受力较小,避免反向弯矩的产生,同时减少材料用量,节约滑坡治理费用。
- 滑坡 /
- 长短组合抗滑桩 /
- 门架式双排桩
Abstract: There are huge differences in internal force and deformation between the front and back rows of double-row anti-slide piles, so they cannot display their sliding resistances simultaneously and adequately. The slide may originate from pile head in the slope reinforced by deeply buried anti-slide piles. In order to solve the above problems, a new concept is put forward that the double-row piles with shorter back row can be used. A finite element model is established and the maximum bending moments and shear forces in the front and back rows of piles with different embedded depths of back row are obtained and discussed. It is indicated that the maximum bending moments, shear forces and deformation degree in the front row of piles are close to those in the back row when the embedded depth in back row increases to a certain value, and this value can be regarded as the design embedded depth. Through comparison with those of several common anti-sliding piles, the internal force and deformation in the front and back rows of the proposed piles are more reasonable, and the two rows of piles can display their sliding resistances adequately. The internal forces are relatively small, and the counter bending moments can be avoided. What’s more, it can save materials and reduce the cost.
- landslide /
- anti-slide pile with different lengths /
- frame double-row pile

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参考文献(15)

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