摘要
边坡系统作为一种天然的力学系统,其变形、开裂、失稳、滑移是一个复杂且难以测量的天然力学过程,常因浅层滑坡灾害而造成严重的人员伤亡和土地资源损失。因此,探索边坡浅层岩体在内外营力作用下诱发的岩体劣化规律及敏感参数是浅层滑坡监测预警的关键。采用自主研发的边坡滑动力NPR锚索监测预警系统,在新昌陈家山村开展了土地复垦诱发边坡浅层岩体劣化全过程监测试验。通过边坡地质调查,在关键监测点位安装边坡滑动力NPR锚索监测预警系统;采用现场标记法记录土地复垦机械开挖点与监测点的时空特征,并分析边坡浅层岩体劣化变形特征与滑动力监测曲线演变特征的相关关系,揭示该系统对陈家山村特定地质条件边坡稳定性的监测灵敏度和临滑预警时间。试验结果表明:针对陈家山村松散堆积层发育的边坡类型,在土地复垦开挖扰动作用下,滑动力监测曲线并未出现类似岩质边坡失稳破坏所呈现的缓升型“不稳定模式”和突升型“裂缝模式”,滑动力监测曲线随着机械开挖点距离监测点越来越近呈阶梯式突降型“多次滑移模式”;该系统在松散堆积层发育的边坡类型下的有效距离监测灵敏度为35 m,分析结果可为类似边坡稳定性监测预警提供参考。
Slope system is a natural mechanical system.Its deformation,cracking,instability,and slippage are a complex and difficult to measure natural mechanical process,which often causes serious casualties and loss of land resources due to shallow landslide disasters.Therefore,exploring the laws and sensitive parameters of rock mass degradation induced by internal and external forces in the shallow slope rock mass is the key to monitoring and conduct early warning of shallow landslides.In this paper,the self-developed slope sliding force NPR anchor cable monitoring and early warning system is used to carry out the whole process monitoring test of the shallow rock mass degradation induced by land reclamation in Chenjiashan Village,Xinchang County.Through the slope geological survey,the slope sliding force NPR anchor cable monitoring and early warning system at the key monitoring points are installed,the on-site marking method is adopted to record the time and space characteristics of the land reclamation machinery excavation points and the monitoring points,so as to analyze the correlation between the deterioration deformation characteristics of shallow slope rock mass and the evolution characteristics of sliding force monitoring curves,and reveal the sensitivity of the system for slope stability monitoring and the pre-sliding warning time of Chengjiashan Village under specific geological conditions.The test results show that for the slope type with loose accumulation layer in Chenjiashan Village,under the disturbance of land reclamation and excavation,the sliding force monitoring curve does not show the"unstable mode"of slow rise and the"crack mode of sudden rise"similar to the failure of rock slope.The sliding force monitoring curve presents a"multiple slip mode"with the step sudden drop as the excavation point gets closer to the monitoring point.The effective distance monitoring sensitivity of the system is 35 m for the slope type with loose accumulation layer,and the analysis results can provide a reference for the st
作者
陶志刚
王振雨
张海江
任番泉
张秀莲
TAO Zhigang;WANG Zhenyu;ZHANG Haijiang;REN Fanquan;ZHANG Xiulian(State Key Laboratory for Geomechanics and Deep Underground Engineering,Beijing 100083,China;Technology Innovation Center for Geological Environment Monitoring,MNR,Baoding 071051,China;School of Mechanics and Civil Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China;Key Laboratory of Rock Mechanics and Geohazards of Zhejiang Province,Shaoxing 312000,China;School of Civil Engineering,Shaoxing University,Shaoxing 312000,China;Noe-ferrous Metals Geological Exploration Bureau of Zhejiang Province,Shaoxing 312000,China)
出处
《金属矿山》
CAS
北大核心
2022年第3期190-196,共7页
Metal Mine
基金
自然资源部地质环境监测工程技术创新中心开放基金项目(编号:2020KFK1212001)。
关键词
松散堆积浅层边坡
土地复垦
距离灵敏度
滑动力监测预警系统
预警模式
loosely accumulated shallow slope
land reclamation
distance sensitivity
sliding force monitoring and early warning system
early warning mode
