城市立交桥桩基托换对桥台基础变形
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摘要
城市立交桥桩基托换不可避免的会对桥台基础的沉降变形产生较大影响。本研究依托郑州市黄河路立交桥F匝道桥台桩基托换工程,利用ABAQUS有限元软件,建立主动托换结构的三维实体有限元模型,通过数值模拟得出主动托换过程对立交桥桥台新旧基础沉降的影响规律,并与现场监测数据对比,模拟结果与现场监测数据基本一致。分析结果表明:沉降影响最大位置在托换梁中部偏西南方向,应加强此区域位置的监控;整个过程位移控制良好,待稳定后可进行后续施工。本研究结果可为类似桩基托换工程的设计和施工提供借鉴和参考。
The pile foundation underpinning of the urban overpass will inevitably have a greater impact on the settlement deformation of the abutment foundation. relying on the bridge pile foundation underpinning of F-channel of Huanghe Road overpass in Zhengzhou City,using ABAQUS finite element software a three-dimensional solid finite element model of active underpinning structure was established. Through the numerical simulation,the influence law of the active underpinning process on the new and old foundation settlement of the overpass abutment is obtained,and compared with the on-site monitoring data,the simulation results are basically consistent with the onsite monitoring data. The analysis results show that the maximum position of settlement is in the southwest direction of the middle of the supporting beam,and the monitoring of the location of this area should be strengthened. The displacement control of the whole process is good,and subsequent construction can be carried out after stabilization. The research results can provide reference and reference for the design and construction of similar pile foundation underpinning projects.
The pile foundation underpinning of the urban overpass will inevitably have a greater impact on the settlement deformation of the abutment foundation. relying on the bridge pile foundation underpinning of F-channel of Huanghe Road overpass in Zhengzhou City,using ABAQUS finite element software a three-dimensional solid finite element model of active underpinning structure was established. Through the numerical simulation,the influence law of the active underpinning process on the new and old foundation settlement of the overpass abutment is obtained,and compared with the on-site monitoring data,the simulation results are basically consistent with the onsite monitoring data. The analysis results show that the maximum position of settlement is in the southwest direction of the middle of the supporting beam,and the monitoring of the location of this area should be strengthened. The displacement control of the whole process is good,and subsequent construction can be carried out after stabilization. The research results can provide reference and reference for the design and construction of similar pile foundation underpinning projects.
引文
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8中华人民共和国住房和城乡建设部.建筑桩基技术规范:JGJ94-2008[S].北京:中国建筑工业出版社,2008Ministry of Housing and Urban-Rural Development of the People's Republic of China.Technical code for building pile foundations:JGJ94-2008[S].Beijing:China Architecture&Building Press,2008
9邓涛,关振长,陈开良,等.桥梁桩基主动托换中顶升荷载的简化计算[J].岩土力学,2015,36(11):3259-3267Deng Tao,Guan Zhenchang,Chen Kailiang,et al.Simplified calculation of jacking load in active underpinning of bridge piles[J].Rock and Soil Mechanics,2015,36(11):3259-3267
10熊小刚,江见鲸.桩基托换对上部结构影响的非线性有限元分析[J].特种结构,2003(1):8-10Xiong Xiaogang,Jiang Jianjing.Nonlinear finite element analysis of influence of pile foundation underpinning on superstructure[J].Special Structures,2003(1):8-10
11唐新权.地铁区间隧道下穿桥梁大轴力桩基托换设计与施工[J].铁道标准设计,2016,60(1):87-91Tang Xinquan.Design and construction of large axial force pile foundation underpinning of subway running tunnel passing under bridge[J].Railway Standard Design,2016,60(1):87-91
12李琳,李青宁,张立,等.咸阳国际机场大轴力桥梁桩基托换技术试验研究[J].土木建筑与环境工程,2015,37(增刊2):159-163Li Lin,Li Qingning,Zhang Li,et al.Xianyang international airport iarge axial force bridge pile foundation underpinning technology test[J].Journal of Civil,Architectural&Environmental Engineering,2015,37(S2):159-163
2黄希,陈行,晏启祥,等.地铁隧道下穿桥梁桩基托换力学行为与参数研究[J].施工技术,2017,46(11):67-70Huang Xi,Chen Xi,Yan Qixiang,et al.Research of pile foundation mechanics behavior and parameters underpinning of subway running tunnel passing under the existing bridge[J].Construction Technology,2017,46(11):67-70
3 Takahashi K,Fukazawa N,Agiwara T,et al.Observational control of slurry shield tunnels with super close spacing under the nearby bridge abutments loads[J].Tunnelling and Underground Space Technology,2004,19(4):390-390
4卢慈荣,许原骑,范礼彬,等.地铁基坑与托换桩相互影响的数值分析与监测[J].地下空间与工程学报,2018,14(2):500-506Lu Cirong,Xu Yuanqi,Fan Libin,et al.Numerical analysis and monitoring of mutual influence between subway excavation and pile foundation underpinning[J].Chinese Journal of Underground Space and Engineering,2018,14(2):500-506
5 Sharma J S,Hefny A M,Zhao J,et al.Effect of large excavation on deformation of adjacent MRT tunnels[J].Tunnelling and Underground Space Technology,2001,16(2):93-98
6韦青岑,张俊儒,何基香.地铁车站超宽深基坑内既有高架桥梁桩基托换关键技术研究[J].隧道建设,2018,38(6):1014-1021Wei Qingcen,Zhang Junru,He Jixiang.Key underpinning technology for pile foundation of existing viaduct beam in super-wide deep foundation pit of metro station[J].Tunnel Construction,2018,38(6):1014-1021
7何文锋.被动式基础托换技术在地铁施工中的应用[D].广州:华南理工大学,2012He Wenfeng.The application of passive pile foundation underpinning project to subway construction[D].Guangzhou:South China University of Technology,2012
8中华人民共和国住房和城乡建设部.建筑桩基技术规范:JGJ94-2008[S].北京:中国建筑工业出版社,2008Ministry of Housing and Urban-Rural Development of the People's Republic of China.Technical code for building pile foundations:JGJ94-2008[S].Beijing:China Architecture&Building Press,2008
9邓涛,关振长,陈开良,等.桥梁桩基主动托换中顶升荷载的简化计算[J].岩土力学,2015,36(11):3259-3267Deng Tao,Guan Zhenchang,Chen Kailiang,et al.Simplified calculation of jacking load in active underpinning of bridge piles[J].Rock and Soil Mechanics,2015,36(11):3259-3267
10熊小刚,江见鲸.桩基托换对上部结构影响的非线性有限元分析[J].特种结构,2003(1):8-10Xiong Xiaogang,Jiang Jianjing.Nonlinear finite element analysis of influence of pile foundation underpinning on superstructure[J].Special Structures,2003(1):8-10
11唐新权.地铁区间隧道下穿桥梁大轴力桩基托换设计与施工[J].铁道标准设计,2016,60(1):87-91Tang Xinquan.Design and construction of large axial force pile foundation underpinning of subway running tunnel passing under bridge[J].Railway Standard Design,2016,60(1):87-91
12李琳,李青宁,张立,等.咸阳国际机场大轴力桥梁桩基托换技术试验研究[J].土木建筑与环境工程,2015,37(增刊2):159-163Li Lin,Li Qingning,Zhang Li,et al.Xianyang international airport iarge axial force bridge pile foundation underpinning technology test[J].Journal of Civil,Architectural&Environmental Engineering,2015,37(S2):159-163