杭嘉湖地区“II”形双排桩河道护岸结构性状分析及优化设计

发布时间：2018-05-08 20:10

  本文选题：桩式护岸结构 + 有限元法　； 参考：《浙江大学》2014年硕士论文

【摘要】：杭嘉湖地区地处“长三角经济区”,人口密集,经济发达,但随着社会经济的快速发展,水环境恶化问题却日益严重。为此,在“治污为本”的前提下,通过实施引排通道和河网综合治理建设,以促进地区骨干河网循环流动,达到治污的目的。在河道整治拓宽中,往往碰到局部房屋密集区域,为保证工程能顺利实施,提出了双排灌注桩的临时性支护为永久性结构护岸型式,但对双排桩护岸结构体系的性状研究至今尚不深入,在大型工程项目中的应用还较为保守。 本文结合杭嘉湖东部平原的河道整治工程,从保持现状河道的自然性、生态性、减少征用土地和拆迁工程量等角度出发,设计对房屋密集河段采用“Π”形双排桩结构型式的河道护岸。与基坑双排门架式结构相比,“Π”形双排桩结构具有其自身的结构特点：1)后排桩间距更大,不设桩顶通长冠梁,只设前后排桩拉梁；2)后排桩起拉锚作用。 结合具体工程,本文对“Π”形双排桩护岸结构的内力变形性状开展研究,主要研究内容如下： 1)系统总结双排桩的研究现状,对双排桩理论中的比例系数法、刚体极限平衡法、等效抗弯刚度法以及弹性地基梁法进行详细阐述； 2)简要阐述本文有限元基本理论和ABAQUS、PLAXIS软件。 3)分别建立“Π”形双排桩护岸结构的三维和二维有限元分析模型,探讨被动土加固区、桩径、桩间距、排距等因素的影响,为此类河道护岸结构的优化设计提供参考。
[Abstract]:The Hangzhou and Jiahu area is located in the "Yangtze River Delta Economic Zone" with dense population and developed economy. However, with the rapid development of social economy, the problem of deterioration of water environment is becoming more and more serious. Therefore, under the premise of "pollution control is the basis", through the implementation of comprehensive management construction of diversion and drainage channels and river networks, the circulation flow of the backbone river networks in the region can be promoted and the purpose of pollution control can be achieved. In order to ensure the smooth implementation of the project, in order to ensure the smooth implementation of the project, the temporary support of double-row cast-in-place piles is put forward as a permanent structure bank protection type. However, the research on the characteristics of double-row pile revetment structure system is still not thorough, and its application in large engineering projects is conservative. Based on the river regulation project in the eastern plain of Hangzhou and Jiaxi Lake, this paper starts from the point of view of maintaining the natural and ecological nature of the river course, reducing the requisition of land and the amount of demolition works, etc. The riverway bank protection of building dense reach is designed with the structure of "蟺" type double row pile. Compared with the double row door frame structure of foundation pit, the structure of "鈪，

本文编号：1862877