桥墩弹性模量变化对基岩承载力影响试验研究

Study on effect of elastic modulus variation of bridge pile on rock bearing capacity

依据福建省宁德地区高速公路下白石大桥主桥墩基础模型模拟试验,分析了桥墩弹性模量变化对基岩极限承载力的影响。试验结果表明桥墩混凝土的弹性模量变化不但影响基岩承载力,而且桥墩弹性模量与基岩弹性模量之间存在着某一最佳匹配。试验结论不仅为桥墩的合理设计提供参考,也为弥补嵌岩桩现有设计理论的不足提供某种新的思路。

Based on the model simulation test of the pile foundation of Xiabaishi bridge in Fujian province, the effect on the rock limit bearing capacity is analyzed through elastic modulus variation of the bridge pile. The results indicate that not only is rock limit bearing capacity affected by elastic modulus variation, but also there is an optimal value between elastic modulus of the bridge pile and that of rock. Some references will be offered for optimal design of bridge pile on the test results, and some new thoughts are obtained in making up for the shortage in the theory of rock-socked pile design.