Earth excavation method under annular support of deep foundation pit: Fid-Bau Portal

Earth excavation method under annular support of deep foundation pit

QIAN SHIMIAO / LIN JIANHENG / WU FENGJIN / ZHANG HUIHUI

The invention discloses an earth excavation method under a deep foundation pit annular support, an annular transportation road in a steel frame supporting structure comprises an annular transportation road and a plurality of sub-runners arranged in an array shape, the sub-runners are communicated with the transportation road, and in a preferred scheme, the sub-runners are communicated with the transportation road. A vertical shaft in the excavating device comprises a concrete pouring column connected to the inner bottom wall of the vertical shaft, a disc connected to one end of the concrete pouring column and a supporting steel frame connected to the inner side wall of the vertical shaft. The earth excavation method under the annular support of the deep foundation pit has the advantages that too many workers and excavators are not needed for construction, the construction cost is reduced, the excavation period is shortened, the excavated earth can be directly conveyed into a vehicle hopper of a transport vehicle in the excavation process, the transport vehicle does not need to enter an annular support excavation site, and the transportation efficiency is improved. And blockage caused by the fact that vehicles enter and exit the site is avoided, and the effect of erecting an entering support bridge is achieved.

本发明公开了深基坑环形支撑下的土方开挖方法，所述钢架支撑结构中环形运输公路包括呈环状设置的运输道以及多条呈阵列状排列的分流道，多条所述分流道与运输道连通，在一个优选的方案中，所述挖掘装置中竖井包括连接在所述竖井内底壁上的混凝土浇筑柱、连接在混凝土浇筑柱一端的圆盘，以及连接在所述竖井内侧壁上的支撑钢架；本发明提供的深基坑环形支撑下的土方开挖方法具有无需过多人员和挖掘机进行施工，降低了施工成本，缩短了挖掘周期，并且在挖掘过程中能够将挖掘的土方直接输送至运输车辆的车斗内，运输车量无需进入到环形支撑挖掘场地内，避免了车辆进出场地内部造成的堵塞以及进场支撑桥架的搭设的效果。

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