树根桩设计施工要点.rar

树根桩设计施工要点
第一节 一般规定

1. 树根桩可用作承受垂直荷载支承桩、侧向支护桩、抗渗堵漏墙和托换加固。
2. 树根桩直径在100～300mm范围内，桩长不超过30米，布置形式有各种排列的直桩和网状结构的斜桩。
3. 树根桩作为承重桩时，单桩容许承载力可采用下述方法确定：
一、单桩荷载试验。
二、参考同类工程资料。
三、查阅上海市标准《地基基础设计规范》DBJ－11－89，桩侧摩阻力取规范大值。
4. 4.树根桩 托换加固时
Root pile design and construction elements
Section I General Provisions

1. Root pile can be used to withstand vertical load bearing piles, pile lateral support, permeability plugging the wall and underpinning.
2. Root pile diameter of 100 ~ 300mm range, the pile length not exceeding 30 meters, a variety of layout and arrangement of vertical piles inclined pile network structure.
3. Root piles as load-bearing pile, the pile bearing capacity can be used to allow the following methods:
1, pile load test.
Second, information on similar projects for reference.
Third, access to the Shanghai standard "Foundation Design Code" DBJ-11-89, take the pile shaft resistance standard large value.
4.4. When Root Piles Underpinning