摘要
针对碎石桩复合地基布置对岸坡整体稳定性的影响,进行数值建模分析及现场试验。采用Geostudio有限元软件结合某碎石桩复合地基岸坡工程实例进行模拟计算的方法,分析不同碎石桩间距、施打范围以及周期性潮位变化对岸坡稳定的影响,同时开展海侧前沿增加碎石桩的试验段对比监测。结果表明,碎石桩间距变化对岸坡稳定性影响较小,周期性潮位变化下海侧安全系数的浮动区间较陆侧大,岸坡前沿增大碎石桩施打范围有利于护岸整体的稳定。在不改变桩径及桩间距的条件下,在岸坡海侧前沿加宽一定的碎石桩范围,可增强滑动面内的复合地基整体抗剪强度比例,达到提高海侧岸坡稳定性的效果。
Regarding the influence of the arrangement of gravel pile composite foundation on the whole stability of bank slope,numerical modeling analysis and field test are carried out.Using the method of Geostudio finite element software combined with the slope engineering example of a gravel pile composite foundation for simulation calculation,the influence of different gravel pile spacing,driving range and periodic tidal level changes on the stability of the bank slope is analyzed.Meanwhile,the comparative monitoring of the test section of adding gravel pile at the sea front is carried out.The results show that the variation of gravel pile spacing has little influence on the stability of bank slope,the floating range of safety coefficient on the sea side is larger than that on the land side under periodic tidal level variation,and increasing the range of gravel pile in front of bank slope is conducive to the overall stability of bank protection.Under the condition of not changing the pile diameter and pile spacing,widening the scope of gravel pile on the front of the seaside bank slope can enhance the overall shear strength ratio of composite foundation in the sliding surface,and achieve the effect of improving the stability of the bank slope.
作者
龚永康
李嘉豪
GONG Yong-kang;LI Jia-hao(Shanghai Waterway Engineering Design and Consulting Co.,Ltd.,Shanghai 200120,China;College of Civil Engineering and Architecture,Nanchang Hangkong University,Nanchang 330063,China)
出处
《水运工程》
北大核心
2023年第1期164-169,共6页
Port & Waterway Engineering
关键词
软土地基
岸坡
碎石桩
稳定分析
soft soil foundation
bank slope
gravel pile
stability analysis
