地基承载力特征值和桩端承载力特征值的比较研究

Comparative Study on Subgrade Bearing Capacity Characteristic Value and Pile Point Bearing Capacity Characteristic Value

工程中常涉及到地基承载力特征值fa及桩端阻力qpa,作为同量纲的地基指标,对同一土层后者往往要比前者高得多。运用梅耶霍夫地基极限承载力理论,分析了随基础埋深的加大地基土破坏形式的变化,对浅基础及桩基础破坏形式、地基承载力特征值fa与桩端承载力特征值qpa作了对比。研究结果将有利于建立及区别地基承载力特征值及桩端端阻力特征值的物理概念,对实际工程具有指导意义。

In this paper, Meyerhof theory of ultimate subgrade bearing capacity is used to analyze the change in foundation soil failure form along with increasing burial depth of foundation, and the comparative study on the subgrade bearing capacity characteristic value and pile point bearing capacity characteristic value is also made, which will help establish and distinguish the physical concepts of the twocharacteristic values and is of guidance significance to practical engineerings.