桩墩扶壁复合土钉墙设计参数的敏感性分析

朱逢斌; 缪林昌; 顾欢达; 林水仙

doi:10.13204/j.gyjz201311018

桩墩扶壁复合土钉墙设计参数的敏感性分析

doi: 10.13204/j.gyjz201311018

1.
1. 东南大学岩土工程研究所,南京 210096;
2.
2. 苏州相城区建设工程质量监督站,江苏苏州 215131;
3.
3. 苏州科技学院土木工程学院,江苏苏州 215011;
4.
4. 苏州高铁新城管委会,江苏苏州 215131

基金项目:

住房与城乡建设部基金项目(2009-K3-2)

详细信息

作者简介:
朱逢斌，男，1981年出生，博士研究生，讲师。电子信箱:zfb_njfu@hotmail.com

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出版历程
- 收稿日期: 2011-12-01
- 刊出日期: 2013-11-20

SENSITIVITY ANALYSIS OF DESIGN PARAMETERS OF COMPOSITE SOIL NAILED WALL WITH BORED PILES IN DEEP EXCAVATION

1.
1. Institute of Geotechnical Engineering,Southeast University,Nanjing 210096,China;
2.
2. Construction Engineering Quality Supervision Station,Xiangcheng District,Suzhou,215131,China;
3.
3. School of Civil Engineering,Suzhou University of Science and Technology,Suzhou,215011,China;
4.
4. The Management Committee of Suzhou High-Speed Ｒailway New Town,Suzhou 215131,China

摘要

摘要: 针对软土地区采用桩墩扶壁复合土钉墙围护结构的基坑,按实际工况进行了基坑开挖支护的三维全尺寸非线性有限元模拟,其中土体采用修正剑桥弹塑性模型。研究结果表明:桩墩扶壁复合土钉墙围护结构中的灌注桩墩具有良好的挡土效应,而锚杆则对周边土体具有较好的锚固作用,为了充分发挥灌注桩墩及锚杆本身性能,并减小基坑开挖对复合土钉墙工作性状的不利影响,建议实际施工中灌注桩间距控制在2~2.5 m、嵌固深度不超过基坑开挖深度,而锚杆倾角则宜控制在20以内。
- 复合土钉墙 /
- 灌注桩墩 /
- 锚杆 /
- 三维非线性有限元 /
- 挡土效应 /
- 锚固作用
Abstract: According to the site working conditions,the 3D full-scale non-linear finite element methods were used to simulate the deep excavation supported by a composite soil nailed wall with bored piles in soft soil. The modified Cam-clay model was applied as the soil's constitutive relationship during the simulation. The results showed that the retaining effects of bored piles and the anchorage effects of anchors were quite good when they were added in the composite soil nailed wall. In order to bring the bored piles and anchors into full play and decrease the adverse effects on the behaviors of the composite soil nailed wall due to deep excavation,it was suggested that the bored pile spacing and embedded depth should be set from 2 m to 2. 5 m and the embedded depth should be no more than the excavation depth,while the anchor inclination should be controlled within 20. The numerical results agreed well with the field data.
- composite soil nailed wall /
- bored pile /
- anchor /
- 3D non-linear finite element /
- retaining effects /
- anchorage effects