| China Geological Environment Monitoring Institute, China Geological Disaster Prevention Engineering Industry Association | Host |
| Citation: |
LUO Xiaojuan. Mechanism of the landslide deformation due to drilling of boreholes：A case study of Fanshantou landslide at Songyang County of Zhejiang Province[J]. The Chinese Journal of Geological Hazard and Control, 2021, 32(3): 84-90. doi: 10.16031/j.cnki.issn.1003-8035.2021.03-11
|
Mechanism of the landslide deformation due to drilling of boreholes：A case study of Fanshantou landslide at Songyang County of Zhejiang Province
-
Abstract
Fanshantou landslide in Songyang is a medium-sized soil landslide with two sliding belts. The geological conditions are complex. After the first discovery in 2010, it has been in a period of peristaltic deformation. In July 2018, it began to adopt siphon drainage engineering. During the process of treatment and construction, a large amount of drilling water was lost, resulting in a cumulative deformation of 57 to 74 mm in the depth of the landslide until the oblique hole was cut, and the maximum width of the landslide surface crack reached 17.5 mm. After stopping drilling and starting siphon drainage, the landslide cracks stopped expanding, and the deep area displacement was controlled within 1 mm. Based on the monitoring data of the emergency rescue, this paper analyzes the bidirectional response process of moving landslide to the changes of groundwater flow field, and analyzes the mechanism of the response process by means of hydraulics and effective stress principle. It is concluded that groundwater runoff permeability must be fully considered in design calculation and engineering practice, and can not be ignored blindly.
-
Keywords:
- moisturing landslide /
- drilling leaks /
- landslide response /
- groundwater runoff /
- permeability
-
-
References
[1] 王恭先. 滑坡学与滑坡防治技术文集[M]. 北京: 人民交通出版社, 2010: 130−131. WANG Gongxian. Anthology of landslide science and landslide prevention technology[M]. Beijing: China Communication Press, 2010: 130−131. (in Chinese) [2] 孙淼军, 唐辉明, 王潇泓, 等. 蠕动型滑坡滑带土蠕变特性研究[J]. 岩土力学,2017,38(2):385 − 392. [SUN Miaojun, TANG Huiming, WANG Xiaohong, et al. Creep properties of sliding-zone soil from a creeping landslide[J]. Rock and Soil Mechanics,2017,38(2):385 − 392. (in Chinese with English abstract) [3] 夏敏, 任光明, 马鑫磊, 等. 库水位涨落条件下滑坡地下水渗流场动态特征[J]. 西南交通大学学报,2014,49(3):399 − 405. [XIA Min, REN Guangming, MA Xinlei, et al. Dynamic responses of groundwater seepage of landslide influenced by fluctuaion of reservoior water level[J]. Journal of Southwest Jiaotong University,2014,49(3):399 − 405. (in Chinese with English abstract) doi: 10.3969/j.issn.0258-2724.2014.03.005 [4] 许旭堂, 简文彬. 滑坡对降雨的动态响应特征及其监测预警研究[J]. 工程地质学报,2015,23(2):203 − 210. [XU Xutang, JIAN Wenbin. Dynamic response of pengkeng landslide to rainfall and its monitoring and early warning[J]. Journal of Engineering Geology,2015,23(2):203 − 210. (in Chinese with English abstract) [5] 向家松, 文宝萍, 陈明, 等. 结构复杂滑坡活动对库水位变化的响应特征—以三峡库区柴湾滑坡为例[J]. 水文地质工程地质,2017,44(4):71 − 84. [XIANG Jiasong, WEN Baoping, CHEN Ming, et al. Activity response of a landslide with complex structure to fluctuation of reservoir water level: a case study of the Chaiwan landslide in the Three Gorges Reservoir[J]. Hydrogeology & Engineering Geology,2017,44(4):71 − 84. (in Chinese with English abstract) [6] 尹晓萌, 晏鄂川, 杜毅, 等. 库水位下降条件下堆积层滑坡稳定性分析[J]. 中国地质灾害与防治学报,2017,28(3):8 − 15. [YIN Xiaomeng, YAN Echuan, DU Yi, et al. Stability of colluvial landslide with drawdown of reservoir water level[J]. The Chinese Journal of Geological Hazard and Control,2017,28(3):8 − 15. (in Chinese with English abstract) [7] 尹晓萌, 晏鄂川, 刘旭耀,等. 对土体稳定性计算中地下水作用力的探讨[J]. 岩土力学,2019,40(1):1 − 9. [YIN Xiaomeng, YAN Echuan, LIU Xuyao, et al. Study on force of undergroud water in the soil stability calculation[J]. Rock and Soil Mechanics,2019,40(1):1 − 9. (in Chinese with English abstract) [8] 李广信. 关于有效应力原理的几个问题[J]. 岩土工程学报,2011,33(2):315 − 320. [LI Guangxin. Some problems about principle of effective stress[J]. Chinese Journal of Geotechnical Engineering,2011,33(2):315 − 320. (in Chinese with English abstract) [9] 陈仲颐, 周景星, 王洪瑾. 土力学[M]. 北京: 清华大学出版社, 1994: 56-60. CHEN Zhongyi, ZHOU Jingxing, WANG Hongjin. Soil mechanic[M]. Beijing: Tsinghua University Press, 1994: 56-60. (in Chinese) [10] 殷跃平. 中国滑坡防治工程理论与实践[J]. 水文地质工程地质,1998,25(1):5 − 9. [YIN Yueping. Theory and practice of Chinese landslide prevention and control engineering[J]. Hydrogeology & Engineering Geology,1998,25(1):5 − 9. (in Chinese with English abstract) [11] 苏永华, 蹇宜霖, 张航. 基于滑带软化的滑坡渐进破坏机制分析[J]. 公路工程,2019,44(1):32 − 37. [SHU Yonghua,JIAN Yilin, ZHANG Hang. Analysis of landslide progressive failure mechanism based on sliding zone softening[J]. Highway Engineering,2019,44(1):32 − 37. (in Chinese with English abstract) [12] 屠义伟. 公路浅表型滑坡检测技术选用及施工技术应用研究[J]. 公路工程,2018,43(3):297 − 302. [TU Yiwei. Study on selection of highway shallow phenotypic landslide detection technology and application of construction technology[J]. Highway Engineering,2018,43(3):297 − 302. (in Chinese with English abstract) -
Access History
Figures(10)
Tables(1)
Export File
Citation
LUO Xiaojuan. Mechanism of the landslide deformation due to drilling of boreholes：A case study of Fanshantou landslide at Songyang County of Zhejiang Province[J]. The Chinese Journal of Geological Hazard and Control, 2021, 32(3): 84-90. doi: 10.16031/j.cnki.issn.1003-8035.2021.03-11
Format
Content
DownLoad:
-
Figure 1.
Map of Fanshantou Landslide
-
Figure 2.
Main Profile of Fanshantou Landslide
-
Figure 3.
Projective Profile of Fanshantou Landslide
-
Figure 4.
Surface displacement monitoring and rainfall monitoring data
-
Figure 5.
Chart of rainfall distribution in October 2018
-
Figure 6.
Chart of cracks during construction
-
Figure 7.
Variation of the accumulative subsurface displacement with depth measured using a borehole inclinometer
-
Figure 8.
Hydrogeology profile of Fanshantou landslide
-
Figure 9.
Changes of groundwater level after siphon drainage
-
Figure 10.
Chart of cracks after siphon drainage