| 连拱式组合拱结构在深基坑工程中的应用 |
| |
| 引用本文： | 李俊才,陈德文,罗国煜.连拱式组合拱结构在深基坑工程中的应用[J].岩土力学,2004,25(2):220-225. |
| |
| 作者姓名： | 李俊才 陈德文 罗国煜 |
| |
| 作者单位： | 1. 南京大学 地球科学系, 江苏 南京 210093；2.南京工业大学 土木工程学院，江苏 南京 210009； 3. 南京市民用建筑设计院，江苏 南京，210000 |
| |
| 摘 要： | 钻孔灌注桩连拱式组合拱结构是由大直径的钢筋混凝土钻孔灌注桩（拱脚支持桩）和小直径钻孔灌注桩排列呈拱型组合成一个组合截面，将水土压力产生的弯矩和剪力转化为沿拱轴方向的轴向压力，不仅受力合理，而且，有更好的截面效能，刚度和强度也比相同质量的桩（墙）式结构大得多，顶部用钢筋混凝土圈梁连接成整体，在不加撑锚条件下比桩墙式结构能支护更深的基坑，如开挖深度较大，可沿深度方向适当距离增加钢筋混凝土加劲肋，是一种新的支护结构型式，经济效益非常显著。通过在南京某大厦深基坑支护中的应用和土体开挖过程中，对其侧向土压力、桩身应力、支护结构的侧向位移及外侧土体的变形的实测研究，获得了连拱支护结构在软土地区受力和变形的基本规律。
|
| 关 键 词： | 连拱支护结构 深基坑 土压力 变形 |
| 文章编号： | 1000-7598-(2004)02-0220-06 |
| 收稿时间： | 2003-05-11 |
| 修稿时间： | 2003年5月11日 |
Application of multi-arch retaining structure composed of borehole cast-in-place piles to deep foundation pit |
| |
| LI Jun-cai,CHEN De-wen,LUO Guo-yu.Application of multi-arch retaining structure composed of borehole cast-in-place piles to deep foundation pit[J].Rock and Soil Mechanics,2004,25(2):220-225. |
| |
| Authors: | LI Jun-cai CHEN De-wen LUO Guo-yu |
| |
| Institution: | 1. Geoscience Department, Nanjing University, Nanjing 210093, China；2.College of Civil Engineering,Nanjing University of Technology, Nanjing 210009, China；3. Nanjing design Institute of Civil architecture, Nanjing 210000, China |
| |
| Abstract: | The multi-arch retaining structure composed of borehole cast-in-place piles is a type of combined section in which large diameter reinforced concrete bored piles and small diameter bored piles are arranged in the shape of an arch. In this structure the bending moment and the shearing force are converted into the axial pressure along the arch axis. It shows a reasonable bearing ability, has a better section efficiency, and performances larger strength and rigidity than the pile (wall) structure with same quality. The top is connected with reinforced concrete periphery beam, then, without anchoring and poling it can also support a deeper foundation pit than pile (wall) structure. If the excavation depth is too deep, we can lay reinforced concrete rib stiffeners in a proper distance in the direction of the depth. Briefly, this is a new type of retaining structure, and the economic benefit is notable. |
| |
| Keywords: | multi-arch retaining structure deep-foundation pit earth pressure deformation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
