摘要
以合肥市滨湖新区恒大中心深基坑项目为例,使用Flac3D数值软件对桩锚支护基坑开挖过程进行模拟,研究了锚索倾角、锚索自由段长度、锚索预应力、支护桩刚度、桩长和桩间距的变化对支护桩水平位移的影响,并据此给出了优化后的桩锚支护参数建议值,通过优化的桩锚支护参数与原设计参数的桩体位移的数值模拟结果对比,证明该优化参数能够有效减小桩锚基坑开挖引起的侧向变形。将优化结果应用于施工中,通过与原方案对比表明该优化结果能有效减小基坑的侧向变形,保障基坑安全。
The numerical software Flac3D was employed to simulate the excavation procedure of the foundation pit supported by pile-anchor support in Hefei Evergrande Center deep foundation. The inclination angle, free section＇ s length, prestressing force of the anchor, and the stiffness, length, pile spacing of the pile were all covered to study the influence on horizontal dis- placement of the supporting piles, then the optimized pile-anchor support parameters were proposed, and the results of the op- timized design of the supporting parameters were compared with simulation results of the original design, which proved the va- lidity of the optimization design. The optimization results had been applied into the engineering construction, and the compar- ison between the optimization design and original design indicated that the optimization design would lead to less lateral de- formation of the foundation pit, which would contribute to the safety of foundation pit construction.
出处
《铁道建筑技术》
2016年第10期74-78,共5页
Railway Construction Technology
基金
中铁建设集团有限公司2013年度科技研究开发课题(LX13-14)
关键词
基坑工程
桩锚支护
FLAC3D
参数优化
foundation pit project
pile-anchor support
Flac3D
parameter optimization
