桩端后压浆在苏通大桥基础工程中的应用与研究  

Application and Research of Pile Tip Grouting on Sutong Bridge Foundation

作　　者：管义军[1] 

机构地区：[1]江苏省苏通大桥建设指挥部,江苏南通226009

出　　处：《公路交通科技》2006年第7期100-103,107,共5页Journal of Highway and Transportation Research and Development

摘　　要：桩端后压浆技术目前在我国已得到了广泛应用,但多用于城市高层建筑的桩基中,在桥梁特别是在大型桥梁工程中的应用还缺乏成熟的经验。通过苏通大桥19根试桩和主桥、辅桥494根大直径深长桩首次运用U管压浆的成功实践,揭示了压浆的作用机理,提出了实用的理论计算公式,研究了U管压浆装置和成套的施工工艺及质量控制标准,并采用C T检测和承载力自平衡对比试验等手段,有力地验证了压浆取得的效果,值得在类似工程中借鉴和参考。Pile tip grouting technique has been widely adopted in China, especially in pile foundation of high building. As for bridge construction esp. large-scale bridge construction, there is little experience in its application. This article explains the operation mechanism of grouting based on the successful practice of U-pipe grouting adopted in Sutong Bridge project, i.e. 19 trial piles and 494 large-diameter long piles both for main bridge and auxiliary bridge. This article also introduces practical calculation formula and presents the research results of U-pipe grouting device and a whole set of construction workmanship and quality control standards. Finally it effectively identifies the good results of grouting with means of CT inspection and bearing capacity comparison.

关 键 词：大直径深长桩 桩端压浆 机理分析 工艺设计 承载力提高 

分 类 号：U445.551[建筑科学—桥梁与隧道工程]