高桩框架钻孔灌注桩基础在水电站出线铁塔中的应用  

Introduction the application of high pile frame foundation in hydropower station transmission tower

作　　者：程尧平[1] 万祥兵[1] 

机构地区：[1]中国电建集团华东勘测设计研究院有限公司,杭州310014

出　　处：《南水北调与水利科技》2015年第B02期261-262,272,共3页South-to-North Water Transfers and Water Science & Technology

摘　　要：锦屏二级水电站地下厂房需要在雅砻江岸坡上立终端塔，铁塔基础外露基岩高度高达18-30m，基础顶部的水平荷载所引起的水平位移较大，是基础结构尺寸的控制性因素，常规的基础型式如掏挖式或大开挖式已不适用。通过对比分析最终采用高桩框架钻孔灌注桩基础，可以有效的减小基础顶部水平位移，且施工快速方便经济效益较好。对该基础的荷载取值及基础设计进行了详细介绍，可作为同类工程的参考。The underground powerhouse of JinPing Ⅱ hydropower station needs to erect towers in the bank of Yalong river, the height of tower foundation out of bedrock is reach up to 18-30 m,it results in large horizontal displacement on the top of foundation caused by horizontal loads. Horizontal displacement on top is the controlling factor of foundation structure size, the common foundation type like excavation type or pad chimney type are not appiicable. By comparing the analysis, finally choose high pile frame foundation, it can effectively reduce the horizontal displacement on the top, also the construction method is convenient, fast and good economic benefits. The detailed load determination and foundation design are introduced below, also it can be taken as reference to the similar projects.

关 键 词：高桩框架 钻孔灌注桩基础 出线铁塔 水电站 

分 类 号：TM754[电气工程—电力系统及自动化]