"地层-支护协同作用"视角下深基坑监测技术研究OA

In order to study the of deep-large foundation pit engineering in complex soil layers and to explore the charac-teristics of support system stress and deformation,a"dynamic coupling monitoring method of soil-support"was proposed a deep and large foundation pit as the research object.By setting up monitoring points,the hori-zontal displacement of support piles,deep horizontal displacement,anchor rod tension and groundwater level were and the data change rule was analyzed.The results show that the maximum horizontal displacement and anchor rod tension are at the midpoint of the long side pile top,and the 5 depth is the active area of deep dis-placement,which are key control areas;the maximum water level reduction of the water stop curtain is 3.0 m,and the seepage on the downstream side of the seepage path is prominent,which is the weak area of water stop;based on the monitoring results,differentiated coping measures such as hierarchical monitoring frequen-cy anchor rod pre-tightening force optimization and additional dewatering wells are proposed to realize the ac-curate early warning and control of foundation pit risk in complex soil layers.The study that the dynamic corre-lation between soil physical and mechanical characteristics and support monitoring data can realize the accu-rate early warning of foundation pit risk,and provide a new paradigm for the monitoring of foundation pit com-plex soil layers.