无粘结预应力筏板基础地基反力测试研究

Experimental study on subgrade reaction under raft foundation prestressed with unbonded tendon

摘要: 通过现场较大规模的测试研究和整理分析 ,首次获得了无粘结预应力筏板基础地基反力的第一手资料 ,揭示了这种基础地基反力的一些分布规律和无粘结预应力对地基反力分布的影响和作用 ,这些成果校验了该大楼基础的设计 ,亦可供同类基础设计时参考。同时在基底反力测试研究中 ,探讨了大直径土压力盒室内和现场相结合的综合标定方法 ,可为土压力现场测试时借鉴

Abstract: Through largescale field measurements and comparative analysis,this paper reveals the law of the subgrade reaction distribution under the raft foundation prestressed with unbonded tendon and the influence of prestress on the subgrade reaction distribution.The firsthand data of an insitu test of the foundation are presented.Furthermore a synthetical method of insitu and laboratory calibration tests on earth pressure cells is discussed.