摘要
为研究黏性土中静压闭口管桩的贯入机理,开展了室内模型试验。制作了两根不同直径的闭口管桩,通过桩身开浅槽,单根嵌入6个增敏微型光纤光栅传感器,连续监测了静力压桩过程桩身内力变化规律,试验结果表明:由于FBG传感技术灵敏系数高、长期稳定性好等优点,因此能较好的监测沉桩过程桩身受力状态。桩径越大,摩阻比、单位摩阻力越大,端阻比反而越小;不同沉桩深度处,两根试桩桩身轴力均随着沉桩深度的增加而不断递减,但桩径小的递减速率快。
To investigate the penetration mechanism of jacking closed pipe pile in clay,a indoor model text was conducted.Two closed pipe piles of different diameters were fabricated.The shallow-grooves of the piles were used to embed six sensitized micro-fiber grating sensors in a single pile.The internal force variation of the piles in the static pile process was continuously monitored.The test results show that:Due to the high sensitivity coefficient and long-term stability of the FBG sensing technology,it can better monitor the stress state of the pile during the pile sinking process.The larger the pile diameter is,the larger the friction resistance ratio and the unit friction is,the smaller the end resistance ratio is.The different axial forces of the two piles are decreasing with the increase of the pile depth at different pile depths,but the pile of small deceleration rate is fast.
作者
刘春玉
邱锡荣
黄永峰
王永洪
任亮
刘倩
方翔
李明辰
LIU Chun-yu;QIU Xi-rong;HUANG Yong-feng;WANG Yong-hong;REN Liang;LIU Qian;FANG Xiang;LI Ming-chen(School of Civil Engineering,Qingdao Technological University,Qingdao 266033,China;Collaborative Innovation Center for Engineering Construction and Safety of Blue Economic Zone,Shandong Province,Qingdao 266033,China;Hubei Three Gorges Polytechnic.Yichang 443000,China;Tiezheng Testing Technology Co..Ltd.,Ninan 250014,China;Dalian University of Technology,Liaoning Province»Dalian 116024,China;Shenzhen Jiance Intelligent Technology Co.,Ltd.,Shenzhen 518000,China;Zhangji Jiurui Geotechnical Engineering Co..Ltd.,Qingdao 266000,China;&Jianhua Bilding Materials(Lai yang)Co..Ltd.,Yantai 265200,China)
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2021年第3期275-280,共6页
Journal of Optoelectronics·Laser
基金
国家自然科学基金资助项目(51778312,51809146)
山东省重点研发计划项目(2017GSF16107,2018GSF117010,2018GSF117008)资助项目。
关键词
增敏微型光纤光栅传感器
静力压桩
不同桩径的闭口管桩
受力状态
sensitized miniature fiber grating sensor
static pressure pile
closed pipe pile with different pile diameter
force state
