预应力锚索的影响参数分析

Analysis of the Impact Factors of Prestressed Anchor Cable

由于预应力锚索设计参数(如锚索长度、锚索倾角)的选取直接影响着基坑加固技术的可靠性及其在经济上的合理性,故锚索支护重要设计因素对支护效果的影响分析尤为重要。基于大连软件园基坑工程实例,运用有限元GTS软件分别建立0°~60°的锚索倾角力学模型和锚固长度在4 m^11 m的力学模型进行模拟分析。研究发现,综合考虑变形的控制及施工技术条件的限制等因素,对于控制基坑变形,建议布置锚索倾角在10°~15°之间,并考虑经济性等因素,锚固长度宜控制在6 m^7 m的取值范围内。

Design parameters of prestressed anchor cable such as the length,obliquity have direct impacts to the reliability and economic rationality of foundation reinforcement,so it is an very important issue.Taking the foundation pit of Dalian software park as an example,this research adopted GTS software to develop a model with obliquity from 0° to 60° and anchorage length from 4 m^11 m.The results show that considering the deformation control and construction process,the anchor angle should be from 10° to 15°,the length of the cable should be from 6 to 7 meters based on economic consideration.This research can provide valuable information to similar project in the future.