岛盆结合土方开挖技术在老城区深基坑中的应用  

APPLICATION OF EARTH EXCAVATION TECHNOLOGY BASED ON ISLAND-BASIN COMBINATION FOR DEEP FOUNDATION PIT IN OLD DOWNTOWN AREA

作　　者：潘国华 王超迪 任泽军 PAN Guo-hua;WANG Chao-di;REN Ze-jun(Zhejiang Provincial Yijian Construction Group Ltd.,310012,Hangzhou,China)

机构地区：[1]浙江省一建建设集团有限公司,杭州310012

出　　处：《建筑技术》2024年第19期2319-2321,共3页Architecture Technology

基　　金：浙江省住房与城乡建设厅建设科研项目(2023K088)。

摘　　要：老城区市中心基坑工程最大开挖深度达20.55 m,采用3道钢筋混凝土水平内支撑,开挖难度高;土方开挖量达48.5万m^(3),开挖方量大。一方面通过栈桥优化缓解材料堆放和场内交通压力,另一方面分成东西两大区块采用岛盆结合进行土方开挖,加快出土速度,并将中心土墩作为堆场和车辆临时停放点,进一步解决场地紧张的问题,取得了良好的经济效益与社会效益。The foundation pit project in the old downtown,with the maximum excavation depth of 20.55m,was internally supported by three reinforced concrete layers in the horizontal direction,leading to great difficulties in excavation.It also involved large quantities of earth excavation,up to 485,000m^(3).On the one hand,the trestle was optimized to ease the pressure on material stacking and on-site transportation.On the other hand,earth excavation was carried out at a higher rate in east and west blocks based on the island basin combination.In addition,the central mound was used as a storage yard and a temperature parking lot to further ease the land pressure on site.In this way,good economic and social benefits are achieved.

关 键 词：深基坑 两墙合一 内支撑 岛盆结合 

分 类 号：TU74[建筑科学—建筑技术科学]