摘要
倾倒变形体的变形机理控制其变形破坏特征,反映其变形演化规律,直接影响倾倒变形体的工程治理措施类型和方式。首先,通过现场监测数据绘制累计位移曲线,结合克里金插值法,分析西部某水电站导流明渠边坡的倾倒变形破坏特点,并基于分析结果对坡体进行分区,根据不同区域的特点,提出针对该倾倒变形边坡的支护建议。其次,根据导流明渠边坡的工程地质特点,以剖面2-2′为研究对象,利用UDEC进行数值模拟,支护后边坡的破坏区域、塑性区和位移明显减小。在此基础上分析边坡从开挖前到建议支护后的变形破坏演化规律,进而揭示边坡变形机理。研究结果表明,结合克里金插值法的分析,基于监测数据进行坡体分区后的支护建议具有较强合理性。研究成果为倾倒变形体的治理设计提供了一定参考依据。
Deformation failure features of toppling deformation are controlled by the deformation mechanism, which reflects the deformation evolution regularity and influences the types and approaches of treatment to toppling deformation. Firstly, accumulative displacement curves are drawn with monitored data. Deformation failure features of the slope beside the diversion channel are analyzed through Kriging interpolation method. The slope zoning is accomplished based on the results. Support suggestions aiming at the toppling deformation slope are proposed according to different properties of every zone. Secondly, numerical simulation is conducted by UDEC choosing profile 2-2' as the research object according to the engineering geological characteristics of the slope. As a result,the area of deformation zone, plastic zone and the displacement decreases significantly after the treatment. Based on the result, the deformation evolution regularity is analyzed by comparing the condition before and after the excavation and the support. Furthermore the deformation mechanism of the slope is revealed. The result indicates the support suggestions following the zoning method, which is based on monitored data and analysis to the combination of Kriging interpolation method, possesses considerable reasonableness. The achievement provides some references to the design of toppling deformation treatment.
作者
李兴明
晏鄂川
严媛
张世殊
邹浩
Li Xingming;Yan Echuan;Yan Yuan;Zhang Shishu;Zou Hao(Faculty of Engineering,China University of Geosciences(Wuhan),Wuhan 430080,China;Introduction to Central South Geo-Exploration Institute,Wuhan 430080,China;Chengdu Engineering Corporation Limited,Power Construction Corporation of China,Chengdu 610072,China;China Forth Geological Team of Hubei Geological Bureau,Huanggang Hubei 438000,China)
出处
《地质科技情报》
CAS
CSCD
北大核心
2019年第3期227-235,共9页
Geological Science and Technology Information
基金
中国电建集团成都勘测设计研究院有限公司科技项目(P225-2014)
关键词
导流明渠
倾倒变形
变形演化规律
分区
治理
diversion channel
toppling deformation
deformation evolution regularity
zoning
treatment
