基于测斜数据的抗滑桩工作状态评价
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摘要
在抗滑桩上设置测斜管,对抗滑桩的侧向位移进行监测,然后用测斜数据来反演分析抗滑桩的内力,再与抗滑桩的设计内力相比较,就可以知道抗滑桩的工作状态。抗滑桩的工作状态可分为安全、临界安全、非安全3种状态,安全状态下抗滑桩尚有一定的安全余度;临界安全状态下抗滑桩完全发挥了作用,处于最经济的设计安全余度,需要加强监测,密切关注下一步发展;非安全状态下抗滑桩达不到设计的安全要求,可能出现抗滑桩的破坏,必须加强监测,必要时实施新的加固措施。对工程实际中的抗滑桩进行监测,由测斜数据反演分析可知,抗滑桩处于安全工作状态。
The lateral displacements of anti-slide piles are monitored using inclinometer.The internal forces of anti-slide piles were estimated through back analysis of the lateral displacement and then compared with the design internal forces.The operation state of the anti-slide piles could be deduced from the internal forces,which may be divided into the stable state,the limit security state and the instable state.In the stable state,the anti-slide pile still contains certain margin of safety;in the limit state,the anti-slide pile fully plays its role,and it is in the critical state of invalidation;in the instable state,the anti-slide piles cannot meet the required standard,which may lead to the failure of the anti-slide,therefore,the monitoring should be strengthened and the new reinforcement measure is needed.The anti-slide piles in project are in the stable state by back analysis based on data.
The lateral displacements of anti-slide piles are monitored using inclinometer.The internal forces of anti-slide piles were estimated through back analysis of the lateral displacement and then compared with the design internal forces.The operation state of the anti-slide piles could be deduced from the internal forces,which may be divided into the stable state,the limit security state and the instable state.In the stable state,the anti-slide pile still contains certain margin of safety;in the limit state,the anti-slide pile fully plays its role,and it is in the critical state of invalidation;in the instable state,the anti-slide piles cannot meet the required standard,which may lead to the failure of the anti-slide,therefore,the monitoring should be strengthened and the new reinforcement measure is needed.The anti-slide piles in project are in the stable state by back analysis based on data.
引文
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[11]铁道部第二勘测设计院.抗滑桩设计与计算[M].北京:中国铁道出版社,1983.(China Railway Eryuan Engineering Group Co.Ltd..Design and calculation of anti-slide piles[M].Beijing:China Railway Publishing House,1983.(in Chinese))
[12]吴恒立.计算推力桩的综合刚度原理和双参数法[M].北京:人民交通出版社,2000.(WU Hengli.Composite stiffness principle and biparameter method of calculation lateral loaded pile[M].Beijing:China Communications Press,2000.(in Chinese))
[13]戴自航,沈蒲生,彭振斌.弹性抗滑桩内力计算新模式及其有限差分解法[J].土木工程学报,2003,36(4):99-104.(DAI Zihang,SHEN Pusheng,PENG Zhenbin.A new mode for calculating internal forces of stabilizing pile[J].China Civil Engineering Journal,2003,36(4):99-104.(in Chinese))
[14]聂文波,张利洁,胡江运.滑坡治理中抗滑桩设计推力计算探讨[J].岩石力学与工程学报,2004,23(增2):5050-5052.(NIE Wenbo,ZHANG Lijie,HU Jiangyun.Study on designed thrust of anti-slide pile[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(Supp.2):5050-5052.(in Chinese))
[15]宋从军,周德培,肖世国.岩石高边坡埋入式抗滑桩的内力计算[J].岩石力学与工程学报,2005,24(1):105-109.(SONG Congjun,ZHOU Depei,XIAO Shiguo.Calculation of internal force of embedded anti-slide pile in high rock slope[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(1):105-109.(in Chinese))
[2]李爱兵,周先明,段恒健.软岩露天边坡综合治理的研究[C]//第六次全国岩石力学与工程学术大会论文集.北京:科学出版社,2000:487-490.(LI Aibing,ZHOU Xianming,DUAN Hengjian.Study of comprehensive control of weak rocks in an open pit[C]//Proceedings of the6th Rock Mechanics and Engineering Conference.Beijing:Science Press,2000:487-490.(in Chinese))
[3]沈强,陈从新,汪稔,等.边坡抗滑桩加固效果监测分析[J].岩石力学与工程学报,2005,24(6):934-938.(SHEN Qiang,CHEN Congxin,WANG Ren,et al.Monitoring and analysis of reinforcementeffect on slope anti-slide piles[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(6):934-938.(in Chinese))
[4]阮波,李亮,刘宝琛,等.浒家洞滑坡治理工程监测分析[J].岩石力学与工程学报,2005,24(8):1445-1449.(RUAN Bo,LI Liang,LIU Baochen,et al.Analysis on deformation monitoring and tendency of Xujiadong landslide[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(8):1445-1449.(in Chinese))
[5]王大为,佴磊,崔凌秋.延图高速公路中里滑坡抗滑桩设计与监测[C]//第六次全国岩石力学与工程学术大会论文集.北京:科学出版社,2000:474-476.(WANG Dawei,NAI Lei,CUI Lingqiu.Design and monitoring of slide-resistance pile in Zhongli bridge on Yanji to Tumen expreeway[C]//Proceedings of the6th Rock Mechanics and Engineering Conference.Beijing:Science Press,2000:474-476.(in Chinese))
[6]韩艳芬,赵蔚东.八尺门滑坡锚索抗滑桩施工与监测[J].公路,2005,(1):96-101.(HAN Yanfen,ZHAO Weidong.Constructing and monitoring of anti-slide piles with anchor cables on Bachimen landslide[J].Highway,2005,(1):96-101.(in Chinese))
[7]李文广,张修成,刘国彬,等.基于监测数据的围护墙弯矩反分析研究[J].山东理工大学学报,2006,20(3):31-34.(LI Wenguang,ZHANG Xiucheng,LIU Guobin,et al.Study on back analysis for bending moment of retaining wall based on monitoring data[J].Journal of Shandong University of Technology,2006,20(3):31-34.(in Chinese))
[8]LIN S S,LIAO J C.Laterai response evaluation of single piles using inclinometer data[J].Journal of Geotechnical and Geoenviromental Engineering,2006,132(12):1566-1573.
[9]OOI P S K,RAMSEY T L.Curvature and bending moments from inclinometer data[J].International Journal of Geomechincs,2003,3(1):64-74.
[10]陈明金,欧阳祖熙.预应力锚索抗滑桩内力反演计算[C]//地壳构造与地壳应力论文集(17).北京:地震出版社,2004:139-145.(CHEN Mingjin,OUYANG Zuxi.Inversion of internal forces of anti-slide piles with pre-stressed cables[C]//Proceedings of the Crust and Tectonic Stress(17).Beijing:Earthquake Press of China,2004:139-145.(in Chinese))
[11]铁道部第二勘测设计院.抗滑桩设计与计算[M].北京:中国铁道出版社,1983.(China Railway Eryuan Engineering Group Co.Ltd..Design and calculation of anti-slide piles[M].Beijing:China Railway Publishing House,1983.(in Chinese))
[12]吴恒立.计算推力桩的综合刚度原理和双参数法[M].北京:人民交通出版社,2000.(WU Hengli.Composite stiffness principle and biparameter method of calculation lateral loaded pile[M].Beijing:China Communications Press,2000.(in Chinese))
[13]戴自航,沈蒲生,彭振斌.弹性抗滑桩内力计算新模式及其有限差分解法[J].土木工程学报,2003,36(4):99-104.(DAI Zihang,SHEN Pusheng,PENG Zhenbin.A new mode for calculating internal forces of stabilizing pile[J].China Civil Engineering Journal,2003,36(4):99-104.(in Chinese))
[14]聂文波,张利洁,胡江运.滑坡治理中抗滑桩设计推力计算探讨[J].岩石力学与工程学报,2004,23(增2):5050-5052.(NIE Wenbo,ZHANG Lijie,HU Jiangyun.Study on designed thrust of anti-slide pile[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(Supp.2):5050-5052.(in Chinese))
[15]宋从军,周德培,肖世国.岩石高边坡埋入式抗滑桩的内力计算[J].岩石力学与工程学报,2005,24(1):105-109.(SONG Congjun,ZHOU Depei,XIAO Shiguo.Calculation of internal force of embedded anti-slide pile in high rock slope[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(1):105-109.(in Chinese))
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