北京佳程广场深基坑支护工程设计与施工技术

护坡桩、挡土墙、预应力锚杆、压力注浆等施工工艺在一个深基坑支护工程中的综合应用,尤其在采用了挡土墙与桩锚组合支护方案后，改变以往为控制变形采用刚性支点法的设计思路，用弹性支点法在允许变形范围内设计护坡桩与锚杆，大大降低了工程造价，保证了基坑支护系统的安全性、可靠性和经济性,并取得成功。概述以上施工方法的设计、主要技术措施及几点重要的结论。

Project Design and Engineering Tech. for Deep Foundation Pit Support in Beijing Jiacheng Plaza

Application of combination of slop shield piles, soil block wall, pre-stressed anchor, pressure grouting, especially the combination of soil block wall and pile anchor, changed the conventional design consideration of controlling deformation by rigidity pivot. Using elasticity pivot method to design the slop shield piles and anchor within the limitation of deformation permission has greatly deduced the cost of project, and ensured the security, reliability and economy of pit support system. The design, main technical measures, and several conclusions of the project method mentioned above were also introduced.