摘要
框架预应力锚杆支护结构是一种新型的深基坑柔性支护技术。文章阐述了其基本构成和特点,研究了锚杆长度的计算。结合工程实践,基于内部整体稳定性安全系数最小的原则分析了基坑坡角、锚杆锚固体直径、锚杆水平倾角以及锚杆间距等设计参数对锚杆长度和内部整体稳定性安全系数的影响,并给出了所有参数的取值范围,为框架预应力锚杆支护结构的发展应用提供了实践经验。
A new flexible supporting method for deep excavation, namely the frame supporting structure with prestressed anchors, has been developed. The basic composition and main characteristics of this supporting structure are studied, and the length calculation of prestressed anchor is analyzed. Combining the engineering example, the in- fluences of the design parameters, including excavation angle, anchor body diameter, horizontal inclination angle of anchor and spacing between anchors on the anchor length and internal overall safety factor are analyzed based on the principle of the minimum value of safety factor about internal overall stability, then the range of preliminary values of all parameters are given out, which provides the practical guide for the use and development of frame supporting structure with prestressed anchors.
出处
《地下空间与工程学报》
CSCD
2008年第3期406-410,共5页
Chinese Journal of Underground Space and Engineering
基金
甘肃省科技攻关项目(2GS064-A52-040)
关键词
预应力锚杆
支护结构
锚杆长度
安全系数
prestressed anchor
supporting structure
anchor length
safety factor
