大直径桩端压力注浆灌注桩的承载性状试验  

Bearing Behavior Experiment of Bottom-Grouted Large Diameter Pore Pile

作　　者：王志辉[1] 刘斌[1] 庄平辉[2] 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110004 [2]福建省建筑科学研究院,福建福州350001

出　　处：《东北大学学报（自然科学版）》2002年第2期160-163,共4页Journal of Northeastern University(Natural Science)

基　　金：辽宁省自然科学基金资助项目 (9710 2 8)

摘　　要：桩底压力注浆工艺实现了岩土加固与桩基工程的有机结合·现场进行了 3根持力层为砂卵石注浆灌注桩和 1根非注浆桩的静载压桩对比试验研究·结果表明 ,桩端注浆使摩擦桩转为端承摩擦桩 ,桩周附近的侧阻与端阻有了较大幅度的提高 ;在相同的桩顶位移情况下 ,注浆桩的端阻超前发挥 ,而侧阻发挥滞后 ,但是当非注浆桩的侧阻发挥到极限后 ,注浆桩将具有强劲的后继的端阻和侧阻·The bottom grouted craft attains organic bond between soil stabilization and pile foundation. The experiment with 3 shingle bearing layer bore piles and 1 non grouted pile was made on site. The original side frictional pile is changed into end bearing frictional pile after grouting, and the resistance of the side and bottom of pile is increased. In the condition of same displacement at tip of the pile, the end friction of grouting pile exerts ahead of time and its side friction exerts behind, but after the side friction of non grouting goes to extreme, the grouting pile has drivingly continuous end friction and bottom friction.

关 键 词：压力注浆 灌注桩 承载性状 端阻 侧阻 试验研究 大直径桩端 

分 类 号：TU473.14[建筑科学—结构工程]