| 滑坡面下双排抗滑结构的计算方法研究 |
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| 引用本文： | 孙勇.滑坡面下双排抗滑结构的计算方法研究[J].岩土力学,2009,30(10):2971-2977. |
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| 作者姓名： | 孙勇 |
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| 作者单位： | 贵州大学 喀斯特环境与地质灾害防治教育部重点实验室，贵阳 550003 |
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| 基金项目： | 贵州省委组织部高层次人才科研特助项目 |
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| 摘 要： | 将道路桥梁水平受力多排桩计算的结构力学方法引入到双排抗滑结构的计算中。与其不同的是，滑动面以上存在滑坡体，而桥梁的最大冲刷线以上没有考虑这种土体的存在对滑动面以下m法的影响。提出了滑动面以下考虑滑坡体存在的两种新的m法，还对滑动面以上排桩间土体作用在前后排桩的土压力进行了试验和理论分析，给出了计算公式。同时，用有限杆单元法，对双排桩的连梁刚度和用文中提出的方法以桩梁连接方式进行了试验和理论分析得出如下结论：在满足不相互影响排桩间距的情况下，桩顶连梁与桩的刚度比不小于0.48是合适的，此时再增加连梁刚度无意义；桩梁连接为铰结时双排桩受力变形性质最差，刚结时受力变形性质最好；不论是单排桩还是双排桩，桩前（单排桩）和前排桩桩前（双排桩）土体需要开挖时应慎重，因为这种开挖对支护结构影响很大，造价增加很多；双排桩省钱，而且抵抗变形的能力强，值得在工程中研究和广泛应用
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| 关 键 词： | 双排抗滑桩 抗滑机制 新的m法理论 修改的m法 局部土体的库仑土压力 有限杆单元法 |
| 收稿时间： | 2008-03-16 |
Research on calculation method of double-row anti-sliding structure under sliding surface |
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| SUN Yong.Research on calculation method of double-row anti-sliding structure under sliding surface[J].Rock and Soil Mechanics,2009,30(10):2971-2977. |
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| Authors: | SUN Yong |
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| Institution: | Key Laboratory of Karst Environment and Geological Hazard Prevention of Ministry of Education, Guizhou University, Guiyang 550003, China |
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| Abstract: | The method of structural mechanics that bridge used in multi-row piles is introduced to the double-row anti-sliding piles. But it is different, that above the slide surface there exists sliding soil body; however above the scour-line of bridge doesn’t consider the influence that the soil body’s existence on the “m” method . In this paper, two new “m” methods are proposed which consider the existence of sliding soil body. At the same time, the soil pressure on the piles of front-row and back-row aroused by the soil body above slide surface are researched with tests and theoretical analysis; the calculation formulas are proposed. At the same time, the finite staff element method is used to analyze the influence of beam rigidity; and the two new methods proposed are used to analyze the influence of connect way between piles and beam; and the conclusion is obtained that the rigidity ratio between beam and piles being 0.48 is appropriate; the continuative increase of the rigidity ratio is not significant; the worst condition is that connecting way between piles and beam is hinged; the best condition is that connecting way between piles and beam is rigid. Whether is single-row pile or are double-row piles, when the front of single-row pile or the front of the front-row pile(in the double-row piles) needed excavation, it is supposed to that ought to be carefulness to excavate, because it is that the engineering cost increased greatly. And it was considered that the double-row piles cost saving and had strong capability of resisting deformation; it is worthy of research and extensive application to engineering. |
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| Keywords: | double-row anti-sliding piles anti-sliding mechanism new m-method theory modified m-method Coulomb soil-pressure of part soil finite staff element method |
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