桩身外露高度对山区输电线路桩基地震反应的影响
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摘要
陡坡地形条件下山区输电线塔桩基础由于受坡度、地形地貌的影响,桩身常外露一定的高度。但塔基各桩的桩身外露高度及高差对桩基的地震反应有什么影响,尚不清楚。以地震作用下受损的西南山区某输电线塔桩基础为研究对象,采用FLAC3D数值分析软件,对桩身不同外露高度、不同高差时桩基础地震动力响应的变化情况进行分析。结果表明:随着桩身外露高度的增加,桩身峰值加速度、桩身位移、桩身内力的量值均有所增大。随着相邻桩基高差的减小,桩基础的地震反应也相应减小,进而为抗震设防区陡坡地形条件下合理的选取桩身外露高度提供一定依据。
Steep terrain conditions mountain area of transmission line tower pile foundation often appear a certain height due to the effect of gradient and landform. How pile foundations exposed height and elevation difference will have impact on pile of transmission line in mountain area by earthquake,it is still unclear. Models about pile foundations of transmission line in southwestern mountainous area were computed and analyzed by FLAC3 D. Then seismic response on pile foundations was analyzed,which there is exposed pile height and elevation difference. The results show that: pile peak acceleration,pile displacement,internal force of pile all increased obviously along with increasing exposed pile height. Seismic response will diminished along with decreasing pile foundations elevation difference. For the seismic fortification zone under the condition of steep slope topography provide basis for reasonable selection of exposed height of pile.
Steep terrain conditions mountain area of transmission line tower pile foundation often appear a certain height due to the effect of gradient and landform. How pile foundations exposed height and elevation difference will have impact on pile of transmission line in mountain area by earthquake,it is still unclear. Models about pile foundations of transmission line in southwestern mountainous area were computed and analyzed by FLAC3 D. Then seismic response on pile foundations was analyzed,which there is exposed pile height and elevation difference. The results show that: pile peak acceleration,pile displacement,internal force of pile all increased obviously along with increasing exposed pile height. Seismic response will diminished along with decreasing pile foundations elevation difference. For the seismic fortification zone under the condition of steep slope topography provide basis for reasonable selection of exposed height of pile.
引文
1鲁先龙,程永锋.斜坡地形输电线路基础和杆塔的配合技术.电力建设,2012;32(8):29—33Lu Xianlong,Cheng Yongfeng.Study on technology of foundation to match tower structure of transmission line on sloping ground.Electric Power Construction,2012;32(8):29—33
2 程永锋,鲁先龙,郑卫锋.斜坡地形输电线路基础设计研究.武汉大学学报:工学版,2009;42:277—280Cheng Yongfeng,Lu Xianlong,Zheng Weifeng.Research on relationship between surface height and burieddepth increase of excavated foundation in slope terrain.Engineering Journal of Wuhan University,2009;42:277—280
3 鲁先龙,程永锋.我国输电线路基础工程现状与展望.电力建设,2005;26(11):25—27Lu Xianlong,Cheng Yongfeng.Current status and prospect of transmission tower foundation engineering in China.Electric Power Construction,2005;26(11):25—27
4 刘慎之.浅谈高低腿铁塔的基础设计.电力建设,2001;22(8):18—20.Liu Shenzhi.Elementary introduction about foundation design of tower with legs at different height.Electric Power Construction,2001;22(8):18—20
5 乾增珍,鲁先龙.斜坡地形高露头挖孔桩水平承载特性试验研究.辽宁工程技术大学学报:自然科学版,2009;28(2):225 —227Qian Zengzhen,Lu Xianlong.Full-scale field tests on lateral bearing capacity of large diameter belled pile with long cantilever on sloping ground.Journal of Liaoning Technical University,2009;28(2):225 —227
6 刘天新,鲁先龙.输电线路原状土基础抗倾覆特性数值模拟研究.电力建设,2007;28(2):16—19Liu Tianxin,Lu Xianlong.Numerical simulation on anti-overfurning characteristics of undisturbed soil foundation in transmission line.Electric Power Construction,2007;28(2):16—19
7 中华人民共和国建设部.GB50011—2001建筑抗震设计规范(GB50011—2001).北京:中国建筑工业出版社,2001Ministry of Construction,PRC.GB50011—2001 Code for seismic design of buildings(GB 50011—2001).Beijing:China Architecture&Building Press,2001
8 《架空送电线路基础设计技术规定》(DLT 5219—2005)Technical regulation for designing foundation of overhead transmission line(DLT 5219—2005)
9 张大长,赵文伯,刘明源.5.12汶川地震中电力设施震害情况及其成因分析.南京工业大学学报(自然科学版),2009;1(31):44 —48Zhang Dachang,Zhao Wenbo,Liu Mingyuan.Analysis on seismic disaster damage cases and their causes of electric power equipment in5 .12 Wenchuan earthquake.Journal of Nanjing University of Technology(Natural Science Edition),2009;1(31):44—48
10 尤红兵,赵凤新.芦山7.0级地震及电力设施破坏原因分析.电力建设,2013;8(34):100—104You Hongbing,Zhao Fengxin.MS7.0 Earthquake in Lushan and damage cause analysis of power facilities.Electric Power Construction,2013;8(34):100—104
11 康定-崇州Ⅲ,Ⅳ回塔位震害受损情况调查.中国电力工程顾问集团西南电力设计院,2013Kang Ding-Chong ZhouⅢ,Ⅳtransmission line earthquake damage investigation.Southwest Electric Power Design Institute Co.,Ltd,2013
12 陈育民,徐鼎平.FLAC/FLAC3D基础与工程实例.北京:中国水利水电出版社,2009Chen Yumin,Xu Dingping.The foundation and engineering examples of FLAC/FLAC3D.Beijing:China Water Power Press,2009
13 刘书伟,林杭,任连伟.FLAC3D在岩土工程中的应用.北京:中国水利水电出版社,2011Liu Shuwei,Lin Hang,Ren Lianwei.The application of FLAC3D in geotechnical engineering.Beijing:China Water Power Press,2011
14 中华人民共和国建设部.GB 50260—1996电力设施抗震设计标准(GB 50260—1996).北京:中国计划出版社,1996Ministry of Construction,PRC.GB50260—1996 Code for design of seismic of electrical installations(GB50260—1996).Beijing:China Planning Press,1996
15 《架空送电线路杆塔结构设计技术规定》(DLT 5154—2002)Technical Regulation of design for tower and pole structures of overhead transmission line(DLT 5154—2002)
16 中华人民共和国建设部.GB 50010—2010混凝土结构设计规范(GB 50010—2010).北京:中国建筑工业出版社,2010Ministry of Construction,PRC.GB 50010—2010 Code of design of concrete structures(GB 50010—2010).Beijing:China Architecture&Building Press,2010
17 中华人民共和国建设部JGJ 94—2008.建筑桩基技术规范(JGJ94 —2008).北京:中国建筑工业出版社,2008Ministry of Construction,PRC.JGJ 94—2008Technical Code for Building Pile Foundations(JGJ 94—2008).Beijing:China Architecture&Building Press,2010
2 程永锋,鲁先龙,郑卫锋.斜坡地形输电线路基础设计研究.武汉大学学报:工学版,2009;42:277—280Cheng Yongfeng,Lu Xianlong,Zheng Weifeng.Research on relationship between surface height and burieddepth increase of excavated foundation in slope terrain.Engineering Journal of Wuhan University,2009;42:277—280
3 鲁先龙,程永锋.我国输电线路基础工程现状与展望.电力建设,2005;26(11):25—27Lu Xianlong,Cheng Yongfeng.Current status and prospect of transmission tower foundation engineering in China.Electric Power Construction,2005;26(11):25—27
4 刘慎之.浅谈高低腿铁塔的基础设计.电力建设,2001;22(8):18—20.Liu Shenzhi.Elementary introduction about foundation design of tower with legs at different height.Electric Power Construction,2001;22(8):18—20
5 乾增珍,鲁先龙.斜坡地形高露头挖孔桩水平承载特性试验研究.辽宁工程技术大学学报:自然科学版,2009;28(2):225 —227Qian Zengzhen,Lu Xianlong.Full-scale field tests on lateral bearing capacity of large diameter belled pile with long cantilever on sloping ground.Journal of Liaoning Technical University,2009;28(2):225 —227
6 刘天新,鲁先龙.输电线路原状土基础抗倾覆特性数值模拟研究.电力建设,2007;28(2):16—19Liu Tianxin,Lu Xianlong.Numerical simulation on anti-overfurning characteristics of undisturbed soil foundation in transmission line.Electric Power Construction,2007;28(2):16—19
7 中华人民共和国建设部.GB50011—2001建筑抗震设计规范(GB50011—2001).北京:中国建筑工业出版社,2001Ministry of Construction,PRC.GB50011—2001 Code for seismic design of buildings(GB 50011—2001).Beijing:China Architecture&Building Press,2001
8 《架空送电线路基础设计技术规定》(DLT 5219—2005)Technical regulation for designing foundation of overhead transmission line(DLT 5219—2005)
9 张大长,赵文伯,刘明源.5.12汶川地震中电力设施震害情况及其成因分析.南京工业大学学报(自然科学版),2009;1(31):44 —48Zhang Dachang,Zhao Wenbo,Liu Mingyuan.Analysis on seismic disaster damage cases and their causes of electric power equipment in5 .12 Wenchuan earthquake.Journal of Nanjing University of Technology(Natural Science Edition),2009;1(31):44—48
10 尤红兵,赵凤新.芦山7.0级地震及电力设施破坏原因分析.电力建设,2013;8(34):100—104You Hongbing,Zhao Fengxin.MS7.0 Earthquake in Lushan and damage cause analysis of power facilities.Electric Power Construction,2013;8(34):100—104
11 康定-崇州Ⅲ,Ⅳ回塔位震害受损情况调查.中国电力工程顾问集团西南电力设计院,2013Kang Ding-Chong ZhouⅢ,Ⅳtransmission line earthquake damage investigation.Southwest Electric Power Design Institute Co.,Ltd,2013
12 陈育民,徐鼎平.FLAC/FLAC3D基础与工程实例.北京:中国水利水电出版社,2009Chen Yumin,Xu Dingping.The foundation and engineering examples of FLAC/FLAC3D.Beijing:China Water Power Press,2009
13 刘书伟,林杭,任连伟.FLAC3D在岩土工程中的应用.北京:中国水利水电出版社,2011Liu Shuwei,Lin Hang,Ren Lianwei.The application of FLAC3D in geotechnical engineering.Beijing:China Water Power Press,2011
14 中华人民共和国建设部.GB 50260—1996电力设施抗震设计标准(GB 50260—1996).北京:中国计划出版社,1996Ministry of Construction,PRC.GB50260—1996 Code for design of seismic of electrical installations(GB50260—1996).Beijing:China Planning Press,1996
15 《架空送电线路杆塔结构设计技术规定》(DLT 5154—2002)Technical Regulation of design for tower and pole structures of overhead transmission line(DLT 5154—2002)
16 中华人民共和国建设部.GB 50010—2010混凝土结构设计规范(GB 50010—2010).北京:中国建筑工业出版社,2010Ministry of Construction,PRC.GB 50010—2010 Code of design of concrete structures(GB 50010—2010).Beijing:China Architecture&Building Press,2010
17 中华人民共和国建设部JGJ 94—2008.建筑桩基技术规范(JGJ94 —2008).北京:中国建筑工业出版社,2008Ministry of Construction,PRC.JGJ 94—2008Technical Code for Building Pile Foundations(JGJ 94—2008).Beijing:China Architecture&Building Press,2010