In order to overcome the problem of insufficient stiffness caused by shrinkage and creep of the ultra-long concrete support,the prestressed servo system is proposed to be integrated into the concrete support system to form active deformation control technology of concrete support servo system,and practical research is carried out based on a railway junction deep foundation pit project in Shanghai.Practice shows that the maximum deformation of the retaining wall is 22.51 mm,26.39 mm and 37.44 mm respectively under the conditions of setting two,one and no concrete support servo system.The concrete support servo system can effectively improve the stiffness of concrete support and reduce the lateral deformation of the envelope structure,which can meet the deformation control requirements of railway station and subway station nearby.The system has been successfully applied in the railway involved deep foundation pit project for the first time,which can provide reference for the design and construction of railway involved deep foundation pit in similar areas.
关键词
铁路枢纽/深基坑/变形控制/混凝土支撑伺服系统
Key words
railway junction/deep foundation pit/deformation control/concrete support servo system
维普
万方数据