钻孔咬合桩设计计算方法合理性分析

RATIONALITY ANALYSIS OF DESIGN AND CALCULATION METHOD FOR DRILLING OCCLUDE PILE

钻孔咬合桩在设计计算中,有两种主要计算方式,一为忽略素桩,仅计算荤桩的支护稳定性能,二为将荤桩与素桩等效为地下连续墙进行支护结构稳定性计算。为研究钻孔咬合桩的设计计算方法的合理性,使用弹性地基梁法与有限元法分别计算荤桩、等效为地连墙的位移,用correl函数将所得数据与实际监测数据进行相关系数计算,同时,将计算所得数据与实际监测值的位移差进行分析,最后得出适合钻孔咬合桩的设计计算方法。即应先使用弹性地基梁法仅计算荤桩;再使用有限元法,将咬合桩等效为地下连续墙进行建模分析,对设计图的变形进行二次评估验算。

Two main calculation methods are used in the design and calculation of the drilling occlude pile,one is to ignore the plain pile and only calculate the support stability performance of the meat pile,and the other is to equivalent the meat pile and the plain pile to the underground diaphragm wall for the stability calculation of the support structure.In order to study the rationality of the design and calculation method of the drilling occlude pile,the elastic foundation beam method and the finite element method are used to calculate the displacement of the meat pile and the equivalent wall respectively.The correl function is used to calculate the correlation coefficient between the obtained data and the actual monitoring data.At the same time,the displacement difference between the calculated data and the actual monitoring value is analyzed.Finally,the design and calculation method suitable for the bored interlocking pile is obtained.That is,the elastic foundation beam method should be used to calculate only the meat piles first;Then,the finite element method is used to equivalent the interlocking pile to the underground diaphragm wall for modeling and analysis,and the deformation of the design drawing is evaluated and checked again.