山地建筑块碎岩地基桩基设计合理性探讨

Discussion on Design Reasonableness of Ground/Pile Foundation with Crushed Rocks in Mountainous Buildings

块碎岩地基是山区地基的一种特殊类型,主要分布于重庆市云阳县、奉节县、巫山县一带,具有岩块强度高,岩体强度低的特点。为保证桩基础设计安全可靠,同时达到良好的经济社会效益,此类桩基础设计中特殊问题处理措施及桩基设计相关参数取值的合理性就显得有尤为重要。该文以重庆市奉节县某大型住宅项目为例,从基础安全性,经济性等方面出发,对以块碎岩为持力层的桩基础在设计过程中遇到的问题提出了解决方案,以供读者借鉴参考。

Crushed rock foundation is a special type of mountainous foundation,mainly distributed in Yunyang County,Fengjie County,and Wushan County of Chongqing,featured with great block strength and low rock strength.In order to ensure the safety and reliability of the designed pile foundation and achieve good social and economic benefits,it is very important to ensure the reasonableness of the countermeasures for the special problems in pile foundation design and that of the related parameters in pile foundation design.Taking a large residential project in Fengjie County,Chongqing City as an example,this paper,from the aspects of foundation safety and cost reduction,presented some solutions to the problems in the design process of a pile foundation with crushed rock as the bearing layer,so as to provide reference for readers.