基桩CPT的可靠度分析

在分析了原桥涵设计方法中利用ＣＰＴ 测试结果求基桩承载力的经验公式后， 认为用可靠性理论分析桩的承载力时， 宜用随机场模型来考虑土性参数的空间相关性． 在此基础上， 进一步对用ＣＰＴ 资料求算的基桩承载力进行了统计分析和极限承载力校正， 并对其进行了可靠度分析． 方法可行， 对检验利用ＣＰＴ 资料所确定的基桩承载力的可靠性有重要参考价值．

The reliability analysis on the CPT of the foundation piles

On the basis of the analysis on the method for bridge and culverts,the experience formula for evaluating the loading force of the foundation pile has been obtained by the test result of CPT,it is considered that the space correlations of the soil propently parameters should be taken into account by random model.Then,the static analysis on the loading force and the limit loading force of the foundation pile by the CPT data have been demonstrated.Finally,the stability analysis on the CPT of the foundation piles has been performed.