桩基在多布水电站厂房深覆盖层地基中的应用  

Application of Pile Foundation in Deep- Overburden Foundation of Powerhouse,Duobu Hydropower Project

作　　者：邱敏[1] 鹿宁[1] 鲍呈苍[1] 周邠鹏[1] 赵靖伟[1] 

机构地区：[1]中国水电顾问集团西北勘测设计研究院,西安710065

出　　处：《西北水电》2014年第1期44-48,共5页Northwest Hydropower

摘　　要：深覆盖层的坝基设计是工程设计的难点。多布水电站河床式厂房位于河床深厚覆盖层上,地基承载力较低,变形沉降问题突出。根据厂房整体稳定及基础应力计算成果,完建工况时基础承载力富裕量很小。为提高地基承载力,减小沉降变形,设计采用混凝土灌注桩、旋喷桩等多种措施进行基础处理。计算表明,经处理后复合地基承载力满足设计要求,设计采用的基础处理方案是安全、合理、可行的。The design of the dam foundation in the deep overburden is the difficulty in the engineering design. The run-of-the-river pow- erhouse of Duobu Hydropower Project is seated on the deep and thick overburden on the riverbed, the bearing capacity of its foundation is lower and the deformation settlement is outstanding. In accordance with calculation of the integrated powerhouse stability and foundation stress, the margin of the bearing capacity of the powerhouse foundation is limited when the powerhouse is completed. To improve the bear- ing capacity of the powerhouse foundation and decrease the settlement deformation, the foundation is treated by such measures as applica- tion of concrete berehole pile, jet grouting pile, etc in design. The calculation shows that the bearing capacity of the composite foundation （ after being treated） satisfies the design requirement. Scheme for the foundation treatment applied by the designer is safe, reasonable and feasible.

关 键 词：水电站厂房 深覆盖层 灌注桩 旋喷桩 地基处理 

分 类 号：TV223.22[水利工程—水工结构工程]