基于光纤光栅技术黏性土中静压闭口管桩试验研究  

Experimental study on static piles of closed pipe piles in cohesive soil based on fiber Bragg grating technology

作　　者：刘春玉[3] 邱锡荣 黄永峰 王永洪[1,2] 任亮 刘倩[6] 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)

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033 [2]山东省高等学校蓝色经济区工程建设与安全协同创新中心,山东青岛266033 [3]湖北三峡职业技术学院,湖北宜昌443000 [4]铁正检测科技有限公司,山东济南250014 [5]大连理工大学,辽宁大连116024 [6]深圳市简测智能技术有限公司,广东深圳518000 [7]中基久瑞岩土工程有限公司,山东青岛266000 [8]建华建材(莱阳)有限公司,山东烟台265200

出　　处：《光电子．激光》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。

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.

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 

分 类 号：TU473[建筑科学—结构工程]