昔格达岩层中灌注桩承载力计算方法探讨

昔格达岩层属于极软岩类,现行各规范对极软岩中的桩基未有明确完整的计算方法,这给在昔格达岩层中桩基的设计带来了很大的困难.本文分析了现行桩基承载力各种计算方法的特点,在总结前人经验的基础上,考虑昔格达岩层中灌注桩的承载特性,结合室内试验及该岩层中灌注桩的现场静载试验资料,提出了按土层中的摩擦桩来计算昔格达岩层中灌注桩承载力的计算模式,并得出了相应的计算公式,通过验证,此计算方法可用于昔格达岩层中灌注桩承载力的计算.

Research on Calculating Methods of Cast-In-Situ Piles in Xigeda-Rock

The Xigeda-terrane is a kind of extreme soft rock.There are no specific and intact calculating methods among present regulations,which causes nany difficulties for us to design piles in Xigeda-terrane.The paper analyzes the shortcomings of present calculating methods of bearing capacity of pile foundation.On the grounds of summarizing the previous experience,considering bearing properties of cast-in-situ piles in Xigeda-terrane and combing materials of in-house experiment and static test of cast-in-situ piles in this kind of terrane,the author puts forward the calculating pattern of the bearing capacity of cast-in-situ piles in Xigeda-terrane according to the calculating mode of friction piles in soil and brings forward the corresponding calculating formula.By test,this calculating methods can be applied to the calculation of the bearing capacity of cast-in-situ piles.