中心顺作—周边踏步式逆作施工工艺及关键技术

针对既有逆作法施工环境差、出土效率低的问题,提出了中心顺作、周边踏步式逆作施工工艺,并对该新型逆作施工工艺下的支护结构设计、土方施工技术等进行了研究,进一步提出了逆作结构结合内嵌环梁的支护、立体化土方施工、逆作岛式土方开挖施工等关键技术,再将上述研究成果应用于莘庄龙之梦购物广场工程中。工程实践证明,该项技术在改善逆作施工环境、提高逆作挖土效率、基坑变形和环境影响控制等方面获得了成功。

Central part by bottom-up method and peripheral part by step-like top-down method construction craft and key technologies

To solve problems of bad construction environment and earthwork inefficiency of existing top-down construction,central part by bottom-up method and peripheral part by step-like top-down method construction craft is provided,of which supporting design and earthwork construction are researched further.Some key technologies are presented,which include supporting technology of top-down structure combining with embedded ring beam,stereo earth construction,and island earth construction.Research findings are appli...