双排桩组合支护结构体系中单桩侧向承载力实验研究
文献类型:学位论文
作者 | 宋书志 |
学位类别 | 硕士 |
答辩日期 | 2007 |
授予单位 | 中国科学院水利部成都山地灾害与环境研究所 |
授予地点 | 成都 |
导师 | 孔纪名 |
关键词 | 双排桩 单桩侧向承载力 FLAC3D数值模拟 桩顶联系梁 |
学位专业 | 岩土工程 |
中文摘要 | 本文对双排桩组合支护结构体系中单桩侧向承载力问题进行了研究,回顾了双排桩的国内外研究现状,介绍双排桩组合结构体系的几种常用的计算方法。在总结以上各种计算方法的基础上,运用相似性原理对双排桩支护结构体系进行了几何相似、材料相似和动力学相似的相似性模拟实验,模拟双排桩在桩顶有无联系梁约束下的应力状态,得到了相应的实验数据;并把模型实验得出的结果与软件数值模拟得出的结果进行对照分析,相互修正不同的分析方法得出的实验结果,并引入反分析的方法,归纳出双排桩支护结构中单桩侧向承载力的计算方法经验公式。在模型实验中监测了双排桩桩顶的变形、桩前荷载以及坡体变形的数据,并以此为依据研究双排桩组合结构体系中单桩侧向承载力,得出了在不同坡体荷载下,桩顶约束条件不同时桩前荷载分配规律;在数值模拟中监测了桩顶位移曲线、坡体运动速度等值线图、坡体变形等值线图,并以此为依据与模型实验进行对比修正,得出最终的理论分析结果。通过研究得出以下结论:双排桩组合体系在桩顶有联系梁约束时侧向位移明显小于桩顶无约束下的侧向位移,其侧向位移量仅为无联系梁约束时的67%左右;由于桩顶联系梁的作用,支护结构体系的侧向承载力得到了的较大幅度的提高,桩顶有联系梁约束的组合结构体系的抗力相对桩顶无联系梁约束的情况提高了约40%左右。 |
英文摘要 | This article, which explored lateral load of single pile in double-row piles structure system, reviewed the domestic and foreign research situation of computational method of double-row piles structure system. Similarity principle, such as geometric similarity, material similarity, dynamical similarity and load simulation, was used to analysis double-row piles structure system and the experimental data was got. Finally, the results of physical model tests and numerical simulation software were analyzed and compared. And the introduction of anti-analysis method, summed up the formula of lateral load of single pile in double-row piles structure system.By analysis of the data of the displacements of top of double-row piles, forces before the pile and the displacements of block of landslide, lateral load of single pile in support structure is studied in the double-row piles in model tests. The rules of distribution of load before the pile are drawn under different slide forces. The contour of displacements, velocity of top of double-row piles, displacements of block of landslide are also surveyed in numerical simulation tests. The outcome is drawn by contrast and amendment with the data of model tests.The conclusion is that the lateral displacement of top beam is significantly less than the lateral displacement of no restrain. The lateral displacement under the circumstances of with top beams is account for 67% of that without top beams. As the top beams, the lateral load of capacity has been greatly increased, which improved 40% under the circumstances of with top beams. |
学科主题 | 岩土力学 |
语种 | 中文 |
公开日期 | 2010-10-21 |
分类号 | TV5;TU4 |
源URL | [http://ir.imde.ac.cn/handle/131551/2254] ![]() |
专题 | 成都山地灾害与环境研究所_成都山地所知识仓储(2009年以前) |
推荐引用方式 GB/T 7714 | 宋书志. 双排桩组合支护结构体系中单桩侧向承载力实验研究[D]. 成都. 中国科学院水利部成都山地灾害与环境研究所. 2007. |
入库方式: OAI收割
来源:成都山地灾害与环境研究所
浏览0
下载0
收藏0
其他版本
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。