New Design Calculation Method for "Zero-Occupancy" Foundation Pit Support Structure that Adjacent to Building

When building foundation pit in city intensive area, traditional foundation pit support method needs to occupy some space on the side of the foundation pit. In order to overcome the shortcomings of waste of land resources to make the land area of 100% utilization, a design calculation method for "zero-occupancy" foundation pit support structure is proposed. The method uses high pressure spinning technology to construct interlocking cement soil columns to underpin the soil under the foundation of the building adjacent to the foundation pit. According to different working condition of the construction, the corresponding calculation method is given. The bearing capacity, resistance to deformation and settlement deformation of the surrounding buildings are calculated and analyzed by an example. Combined with the characteristics of the construction of the new method of "zero-occupancy" foundation pit support structure, the corresponding precautions and requirements are put forward.