城市密集区域装配式竖井提吊下沉施工扰动规律研究OA

Conventional construction methods for ultra-deep vertical shafts are often associated with signif-icant disturbance and difficult deformation control in dense urban areas.To address these problems,we simulated the whole construction process of a prefabricated vertical shaft in a practical engineering project with plaxis 3D,and investigated the evolution characteristics of surface settlement,horizontal displace-ment of deep soil,as well as deformation of surrounding structures.The results show that the construction method of lifting and sinking has caused little disturbance to the surrounding environment.The initial dis-turbance is weak,while the settlement growth rate is significantly accelerated in the final settlement stage.The stress in strong disturbance regions fluctuates violently;while that in the weak disturbance re-gions changes gently,and the response lags behind.Among the influencing factors,the length of bored cast-in-place piles has the most significant influence on construction disturbance.The research findings can provide theoretical support for risk control and monitoring optimization in similar engineering projects.