深基坑半逆作法施工中的双层栈桥平面组织

Plane Organization of Double Deck Trestle in Semi-reverse Construction of Deep Foundation Pit

杭州萧山国际机场三期项目交通中心工程基坑邻近运营航站楼,施工平面组织难度大。经过综合比选,确定了半逆作法双层栈桥体系的施工方案。从平面优化设计、总平面布置、交通平面组织及智慧工地4个方面开展研究,总结了半逆作法双层栈桥体系的平面组织关键技术,分析了其对基坑稳定性、周边环境及出土效率的影响,最终取得了较好的实施效果。

The foundation pit of the traffic center of Hangzhou Xiaoshan International Airport Phase Ⅲ project is adjacent to the operation terminal,so it is difficult to organize the construction plane.After comprehensive comparison and selection,the semi-reverse construction method is determined to perform the construction scheme of the double deck trestle system.The key technology of plane organization of semi-reverse construction of double deck trestle system is summarized from four aspects of plane optimization design,general layout,traffic plane organization and intelligent construction site,and its influence on foundation pit stability,surrounding environment and excavation efficiency is analyzed.Finally,a better effect has been achieved.