Application Study and Analysis of Construction Scheme of Anchor Cable for Ultra-deep Foundation Pit of Sewage Plant
In order to study the settlement influence law on the surface around the deep foundation pit and the deformation coordination role of the supporting structure during the construction of multi-layer anchor cables in the deep large foundation pit,based on the Hefei Zhongyoufang Wastewater Treatment Plant oversized deep foundation pit project,and combined with the monitoring data of the supporting structure and the surrounding environment in the actual project,numerical simulation analysis is carried out on the construction stage of each layer of anchor cables in this foundation pit by using FLAC3D,and the comparative study of the construction stage of each layer of anchor cable is carried out.Numerical simulation analysis of each layer of anchor cable construction stage is carried out by using FLAC3D,and comparative study of lateral shift of support structure,surrounding surface settlement and spatial effect of support scheme during the construction process of each layer of anchor cable is carried out to reveal the deformation law of the pit during the construction of anchor cable.The results show that:the anchor cable support system can effectively control the surface settlement around the pit and the lateral displacement of the top of the support structure;the anchor cable support system has obvious spatial horizontal constraint effect,and during the construction of anchor cable,the surrounding piles of the pit show large horizontal displacement in the middle,and small horizontal displacement in the comers of the pit;the axial force of each layer of the anchor cable gradually increases with the construction,and the axial force of the first construction is generally larger than that of the later construction;due to the anchor cable axial force of each layer of the anchor cable,the axial force of the first construction is larger than that of the later construction;and the axial force of the anchor cable of the later construction is greater than that of the first construction.With the construction,the axial force of each layer of anchor cable gradually increases,and the axial force of anchor cable constructed first is generally larger than that of anchor cable constructed later;due to the larger average loss rate of the axial force of anchor cable constructed after the construction,although it can guarantee the normal construction of the anchor cable,it has a significant impact on the surface settlement around the pit,and the impact range is about 2 H(H is the depth of the pit).
deep foundation pitanchor cable axial forcesurface settlementfoundation pit monitoring
万方数据
维普
