To ensure the safety of foundation pit excavation and improve the problem that monitoring points are easy to be damaged in the construction process,taking a foundation pit project of Zhengzhou Rail Transit L8 in Henan as the object,the design and research of protection technology for deep horizontal displacement monitoring points of retaining wall are carried out.A protection measure for inclinometer monitoring points is proposed,which can greatly improve the efficiency of inclinometer monitoring points,which lays a solid foundation for mastering the deformation data of foundation pit and controlling deformation.The monitoring data of engineering foundation pit are analyzed.The results show that it is necessary to timely erect steel support and pre apply axial force,quickly excavate and close the bottom and form the bottom plate in the process of foundation pit excavation.The monitoring and management principles of foundation pit are put forward to guide the monitoring personnel to grasp the key points of foundation pit monitoring and management.Through the engineering practice,the set of protection process design of deep horizontal displacement monitoring points and foundation pit monitoring management principles are adopted,so that the effective rate of inclinometer monitoring points can reach 100%.The monitoring construction cost is relatively reduced,the deformation of foundation pit is controlled,and the safety requirements of foundation pit excavation are met.
foundation pit excavation safetydeep horizontal displacement monitoring pointsefficiencymonitoring managementeconomy
NETL
NSTL
万方数据
