山西晋阳大佛岩质边坡结构面力学参数研究
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摘要
摩崖石刻开凿在陡峭的岩壁上,兼具文物和岩质边坡的双重特点,对其进行稳定性分析首先要获得结构面的力学参数,比如法向刚度、切向刚度、黏聚力、内摩擦角等。目前这些参数在实验室实验主要存在着取样困难,代表性不强的缺点。在晋阳大佛边坡的治理过程中,采用地质类比法确定黏聚力和内摩擦角两项参数。通过声波测试的方法结合动静力学对比分析得到结构面法向刚度和切向刚度。这两种方法简单易行,并且对文物边坡无破坏,为类似文物边坡治理过程中的结构面参数确定提供了借鉴。
Cliffside inscription was cut in the steep cliff.Thus it has dual characters of the relics and rock slope.To analyze its stability must obtain the mechanical parameters of the structural surface firstly such as normal stiffness,shear stiffness,cohesion and internal friction angle.Now,these parameters obtained in laboratory experiments are not representative.Hence,geological analogy method was used to determine the two parameters of cohesion and internal friction angle.Furthermore,acoustic test method combined with dynamic and static mechanics comparative analysis is used to determine normal stiffness and tangential stiffness of the structural surface.These two methods are simple and have no destruction to heritage slope,which provide a reference to determine structural surface parameters of similar relics slope during the governance process.
Cliffside inscription was cut in the steep cliff.Thus it has dual characters of the relics and rock slope.To analyze its stability must obtain the mechanical parameters of the structural surface firstly such as normal stiffness,shear stiffness,cohesion and internal friction angle.Now,these parameters obtained in laboratory experiments are not representative.Hence,geological analogy method was used to determine the two parameters of cohesion and internal friction angle.Furthermore,acoustic test method combined with dynamic and static mechanics comparative analysis is used to determine normal stiffness and tangential stiffness of the structural surface.These two methods are simple and have no destruction to heritage slope,which provide a reference to determine structural surface parameters of similar relics slope during the governance process.
引文
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2杜锦华.晋阳文史资料(第五辑).太原:政协太原市晋源区文史资料委员会,2001
3田小甫.太原晋阳大佛边坡岩体风化分级及地震稳定性评价研究.北京:中国地质大学(北京),2009
4向波,周立荣,马建林.基于岩体结构面分级的抗剪强度确定法.岩石力学与工程学报,2008;27(2):3547—3552
5刘春,白世伟.岩体风化程度两级模糊综合评判研究.岩石力学与工程学报,2005;24(2):252—256
6孙进忠,蔡新滨,陈祥.岩土介质动静力学参数与介质物理组构参数之间的关系.地球与环境,2005;33(3):101—106
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