孟加拉帕德玛大桥化学浆护壁成孔及桩底压浆和桩侧压浆钻孔桩施工技术  

Bored pile construction technology of Bangladesh Padma Bridge project with polymer slurry,base grouting and skin grouting

作　　者：徐平安[1] XU Pingan(China Railway Major Bridge Engineering Group Co.,Ltd,Wuhan 430050,China)

机构地区：[1]中铁大桥局集团有限公司,湖北武汉430050

出　　处：《中国高新科技》2020年第8期80-83,共4页

摘　　要：针对孟加拉帕德玛大桥Mawa侧引桥桥址区域典型的特粉细砂地质(且在-27mPWD以上的区域存在地震液化带),传统的膨润土泥浆护壁钻孔方法、桩基总承载力都无法满足设计要求。文章采用化学浆护壁成孔、桩底压浆和桩侧压浆钻孔桩施工技术,提高了钻孔桩桩端阻力和桩侧摩阻力,总承载力超过地勘极限总承载力,钻孔桩总承载力满足设计承载力要求,取得了良好的经济效益。In view of the typical super fine sand soil conditions(and there is an earthquake liquefaction zone in the area above-27mPWD)at the Mawa approach viaduct of Bangladesh Padma Bridge,using the traditional bentonite slurry wall protection method cannot achieve the targeted pile capacity.This paper adopting the technologies including polymer slurry,based grouting and skin grouting improved the tip resistance and skin friction of the bored pile,and the total pile capacity exceeded the target value,which had achieved good economic benefits.

关 键 词：钻孔桩 化学浆 桩底压浆 桩侧压浆 试验 承载力 

分 类 号：TU753[建筑科学—建筑技术科学]