摘要
针对施工期地下工程的监测技术整体已经较为成熟,但对顶管工程管节内力演化规律的相关研究还较少。以往的研究成果认为:①管道不直接承受土压力作用,注浆压力起控制作用;②纵向钢筋受力与管节内力有关,在不同部位表现的受力性质不同;③环向钢筋受力由多种因素控制,其水平一般不高。上述结论主要是基于理论分析得出的,实测数据较少,且结构的受力水平受到埋深等因素的影响,内力的演化规律应视具体工程条件而定。本研究根据陆翔路—祁连山路顶管工程的现场监测数据,对上述结论进行了对比和修正,提出了浅覆土条件下矩形顶管施工期的内力演化规律。
The monitoring technology for underground engineering during construction period is relatively mature,but there are few researches on the evolution laws of internal forces in pipe jacking tunnels.The results of the previous researches show that:(1)The tunnel is not directly affected by the earth pressure,and the grouting pressure plays a controlling role.(2)The longitudinal reinforcement stress is related to the internal forces of the pipe,and it shows different mechanical properties at different locations.(3)The circular reinforcement stress is affected by many factors,but the stress level is generally not high.These conclusions are mainly based on the theoretical analysis but lack of the measured data.Moreover,the stress level of a structure is affected by a range of factors such as buried depth,and the evolution laws of the internal forces should depend on the specific in-situ conditions.On the basis of the monitoring data from the pipe jacking tunnel of Luxiang Road-Qilianshan Road,the above conclusions are compared and modified,and the evolution laws of the internal forces in rectangular pipe jacking tunnel under shallow soil during construction period are put forward.
作者
朱卫杰
甄亮
徐文蕴
李晓军
ZHU Wei-jie;ZHEN Liang;XU Wen-yun;LI Xiao-jun(Technical Center,Shanghai Road and Bridge(Group)Co.,LTD.,Shanghai 200433,China;College of Civil Engineering,Tongji University,Shanghai 200092,China;Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education,Tongji University,Shanghai 200092,China)
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2022年第S02期130-133,共4页
Chinese Journal of Geotechnical Engineering
基金
上海市青年科技启明星计划资助项目(19QB1401800)
关键词
浅覆土矩形顶管
管节
接触压力
内力
现场监测
rectangular pipe jacking tunnel with shallow soil
pipe
contact pressure
put forward internal force
field monitoring
