三宝沥大桥桩基计算方法的探讨

The Investigations on the Calculation Method for the Pile Foundation of Sanbaoli Bridge

三宝沥大桥为京珠高速公路广珠段的一座大桥,全长680m,主跨为35m预应力工字梁,基础(半幅)为4根1 2嵌岩灌注桩,单桩承载力为5200kN,针对在设计计算中存在着一部分不合理因素,分析了嵌岩桩施工质量对桩基承载力的影响,提出了对规范中嵌岩桩计算方法的相关问题。

Sanbaoli Bridge, a bridge on Guang Zhu section of Jing Zhu Express Highway, is 680 m long with a main span of 35m prestressed Ibeam. Its foundation (half width) is 4 pieces of 12 anchoredinrock castinsitu piles with a load bearing capacity of 5200 kN for each pile. In light of some unreasonable factors existed in design calculation, this paper analyzes the influence of the construction quality of anchoredinrock piles to the load bearing capacity of pile foundation. It also presents related issues on standardizing the calculation method of anchoredinrock piles.