苏通大桥深水群桩基础冲刷防护实测分析  

Experimental analysis of scour protection of deep water group pile foundation of Su Tong Bridge

作　　者：林明惠[1] 陈志坚[1] 

机构地区：[1]河海大学地球科学与工程学院,南京210098

出　　处：《河北工程大学学报（自然科学版）》2017年第2期50-55,共6页Journal of Hebei University of Engineering:Natural Science Edition

基　　金：江苏省政策引导类计划(BY2015002-05)

摘　　要：桥墩建在流水中的桥梁几乎都面临墩周冲刷的问题,为了研究桥墩发生冲刷方式及冲刷防护方法,通过对处于长江下游的苏通大桥主4号大型群桩基础水深传感器及桩身轴力实测数据的分析,发现该桥梁工程采用的冲刷防护方案不仅有效地防止了主墩处河床冲刷,而且在河床铺设砂袋后,进行钢护筒插打时,砂袋被挤入到松软的河床底质层一定深度范围内,对河床底质层和桩周土起到挤密、增密和固结作用。大大提升了河床表层松散体的极限摩阻力,提高了群桩基础的承载力。For those bridge piers built in water, almost all faced with the problem of pier scour. Based on the analysis of water depth sensor and axial force sensor test data of the No.4 main pile of Sutong Bridge in the Yangtze Rive downstream, we found that the scour protection scheme used on the bridge not only prevented the pier scour, and many protective sand bags had been squeezed into the soft riverbed material layer within a certain depth when the steel tube was inserted, which greatly enhanced the ultimate friction resistance of loose bed surface, improved the bearing capacity of pile foundation. The practice proved that the scour protection scheme is scientific and effective, and has important reference value for the design of construction engineering.

关 键 词：苏通大桥 深水群桩基础 冲刷防护 水深监测 桩身轴力监测 

分 类 号：U446[建筑科学—桥梁与隧道工程]