1.南京大学地球科学与工程学院,江苏 南京 210023
2.北京城建中南土木工程集团有限公司,北京 102200
3.南京地铁集团有限公司,江苏 南京 210008
董聪慧(1997—),男,硕士研究生。主要从事地质工程方面的研究。E‑mail:mg1929068@smail.nju.edu.cn
阎长虹(1959—),男,教授,博导,博士。主要从事水文地质工程地质研究与教学工作。E‑mail:yanchh@nju.edu.cn
收稿:2021-06-16,
修回:2021-07-31,
纸质出版:2023-08-28
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董聪慧,阎长虹,娄志会等.某在建城际铁路明洞段地基回填土缓坡稳定性研究[J].防灾减灾工程学报,2023,43(04):835-844.
DONG Conghui,YAN Changhong,LOU Zhihui,et al.Stability of a Gentle Backfill Slope in the Open Tunnel Section of an Intercity Railway under Construction[J].Journal of Disaster Prevention and Mitigation Engineering,2023,43(04):835-844.
董聪慧,阎长虹,娄志会等.某在建城际铁路明洞段地基回填土缓坡稳定性研究[J].防灾减灾工程学报,2023,43(04):835-844. DOI: 10.13409/j.cnki.jdpme.20210616005.
DONG Conghui,YAN Changhong,LOU Zhihui,et al.Stability of a Gentle Backfill Slope in the Open Tunnel Section of an Intercity Railway under Construction[J].Journal of Disaster Prevention and Mitigation Engineering,2023,43(04):835-844. DOI: 10.13409/j.cnki.jdpme.20210616005.
南京某在建城际铁路隧道明洞段穿越矿山废弃宕口回填区,受极端强降雨和明洞地基开挖卸荷影响,矿坑南侧陡崖下部的截排水沟多处出现变形裂缝,因此,宕口填土边坡稳定性关系到在建铁路的施工和运营安全。对此,在地质分析的基础上,运用数值模拟方法对持续性强降雨天气条件下回填土缓坡渗流场、位移场的变化规律及边坡稳定性进行了研究,探讨不同降雨类型对缓坡稳定性的影响。结果表明,在持续性强降雨天气条件下,降水入渗使缓坡下滑力逐渐增大,同时在弱透水层中形成暂时性承压水,产生渗流力和浮托力,在其共同作用下,边坡稳定性显著降低,出现边坡失稳;前峰型降雨和均布型降雨在较短时间内即会对边坡稳定性造成很大影响,而中峰型降雨和后峰型降雨对边坡稳定性的影响在降雨后期逐渐显现。故此,需要对明洞隧道地基进行加固处理,采取有效的截排水措施,以保证城际铁路施工及运营安全。
The open cut section of an excavating intercity railway tunnel in Nanjing crosses the backfill area of a large abandoned mine. Due to the influence of extremely heavy rainfall and excavation unloading of open cut tunnel foundation, many deformation cracks appeared in the intercepting and drainage ditch at the lower part of the steep cliff on the south side of the mine. Therefore, the stability of the backfill gentle slope is related to the construction and operation safety of the railway under construction. In order to solve this problem, on the basis of geological analysis, the numerical method is used to simulate and analyze the changes of the seepage field, displacement field and the slope stability of the gentle backfill slope under continuous heavy rainfall. The influence of different rainfall types on the stability of the gentle slope is discussed. The results show that under the condition of continuous heavy rainfall, precipitation infiltration makes the sliding force of the gentle slope increase gradually, and forms temporary confined water in the aquitard, which results in seepage force and buoyancy force. Under the combined action of the two forces, the slope stability decreases significantly and the slope instability occurs. Besides, it is found that the early-peak rainfall and uniform rainfall will affect the slope stability in a short time, while the influence of the mid-peak rainfall and late-peak rainfall on the slope stability gradually appears in the later stage. Therefore, it is necessary to reinforce the foundation of the open cut tunnel and take effective measures to intercept and drain water in order to ensure the safety of the intercity railway during the construction and operation periods.
黄润秋 , 徐则民 , 许模 . 地下水的致灾效应及异常地下水流诱发地质灾害 [J]. 地球与环境 , 2005 , 33 ( 3 ): 1 - 9 .
Huang R Q , Xu Z M , Xu M . Hazardous effects of underground water and extraordinary water flow-induced geohazards [J]. Earth and Environment , 2005 , 33 ( 3 ): 1 - 9 . (in Chinese)
黄发明 , 殷坤龙 , 蒋水华 , 等 . 基于聚类分析和支持向量机的滑坡易发性评价 [J]. 岩石力学与工程学报 , 2018 , 37 ( 1 ): 156 - 167 .
Huang F M , Yin K L , Jiang S H , et al . Landslide susceptibility assessment based on clustering analysis and support vector machine [J]. Chinese Journal of Rock Mechanics and Engineering , 2018 , 37 ( 1 ): 156 - 167 . (in Chinese)
胡涛 , 樊鑫 , 王硕 . 考虑不同降雨概率和雨型的滑坡渗流场及稳定性变化率特征分析 [J]. 科学技术与工程 , 2020 , 20 ( 14 ): 5521 - 5529 .
Hu T , Fan X , Wang S . Analysis on landslide seepage and change rate of stability coefficient of different rainfall probability and rainfall type [J]. Science Technology and Engineering , 2020 , 20 ( 14 ): 5521 - 5529 . (in Chines)
李媛 , 孟晖 , 董颖 , 等 . 中国地质灾害类型及其特征——基于全国县市地质灾害调查成果分析 [J]. 中国地质灾害与防治学报 , 2004 , 15 ( 2 ): 29 - 34 .
Li Y , Meng H , Dong Y , et al . Main types and characterisitics of geo-hazard in China‑Based on the results of geo-hazard survey in 290 counties [J]. The Chinese Journal of Geological Hazard and Control , 2004 , 15 ( 2 ): 29 - 34 . (in Chinese)
阎长虹 , 许宝田 , 吴澄宇 , 等 . 宁镇地区山前缓坡地层结构及其稳定性分析 [J]. 工程地质学报 , 2019 , 27 ( 1 ): 48 - 54 .
Yan C H , Xu B T , Wu C Y , et al . The stratigraphic structure and stability analysis in gentle slopes of piedmontat Ningzhen area [J]. Journal of Engineering Geology , 2019 , 27 ( 1 ): 48 - 54 . (in Chinese)
燕晓莹 , 阎长虹 , 郜泽郑 . 镇江地区降雨导致滑坡规律统计分析 [J]. 高校地质学报 , 2019 , 25 ( 5 ): 772 - 778 .
Yan X Y , Yan C H , Gao Z Z . Statistical analysis of landslides law caused by rainfall in Zhenjiang area [J]. Geological Journal of China Universities , 2019 , 25 ( 5 ): 772 - 778 . (in Chinese)
俞良晨 , 阎长虹 , 郭书兰 , 等 . 受暂时性承压水影响的南京游子山滑动机制分析 [J]. 水文地质工程地质 , 2020 , 47 ( 1 ): 133 - 141 .
Yu L C , Yan C H , Guo S L , et al . Analysis of sliding mechanism of Youzi Mountain affected by temporary confined water in Nanjing [J]. Hydrogeology and Engineering Geology , 2020 , 47 ( 1 ): 133 - 141 . (in Chinese)
施斌 , 阎长虹 . 工程地质学 [M]. 北京 : 科学出版社 , 2017 .
Shi B , Yan C H . Engineering Geology [M]. Beijing : Science Press , 2017 . (in Chinese)
卢廷浩 . 土力学 [M]. 2版 . 南京 : 河海大学出版社 , 2005 .
Lu T H . Soil Mechanics [M]. 2nd ed . Nanjing : Hohai University Press , 2005 . (in Chinese)
许建聪 , 尚岳全 . 碎石土渗透特性对滑坡稳定性的影响 [J]. 岩石力学与工程学报 , 2006 , 25 ( 11 ): 2264 - 2271 .
Xu J C , Shang Y Q . Influence of permeability of gravel soil on debris landslide stability [J]. Chinese Journal of Rock Mechanics and Engineering , 2006 , 25 ( 11 ): 2264 - 2271 . (in Chinese)
Cho S E . Probabilistic stability analysis of rainfall-induced landslides considering spatial variability of permeability [J]. Engineering Geology , 2014 , 171 : 11 - 20 .
朱元甲 , 贺拿 , 钟卫 , 等 . 间歇型降雨作用下缓倾滑坡稳定性数值模拟 [J]. 灾害学 , 2020 , 35 ( 3 ): 208 - 212 .
Zhu Y J , He N , Zhong W , et al . Numerical simulation of the stability of gently landslides under intermittent rainfall [J]. Journal of Catastrophology , 2020 , 35 ( 3 ): 208 - 212 . (in Chinese)
张泰丽 , 周爱国 , 孙强 , 等 . 台风暴雨条件下滑坡地下水渗流特征及成因机制 [J]. 地球科学 , 2017 , 42 ( 12 ): 2354 - 2362 .
Zhang T L , Zhou A G , Sun Q , et al . Characteristics of the groundwater seepage and failure mechanisms of landslide induced by typhoon rainstorm [J]. Earth Science , 2017 , 42 ( 12 ): 2354 - 2362 . (in Chinese)
孙红月 , 吴红梅 , 李焕强 , 等 . 松散堆积土中的隔水层对边坡稳定性的影响 [J]. 浙江大学学报(工学版) , 2010 , 44 ( 10 ): 2016 - 2020 .
Sun H Y , Wu H M , Li H Q , et al . Effect of temporal and spatial variation of pore water pressure induced by confined groundwater on slope stability [J]. Journal of Zhejiang University(Engineering Science) , 2010 , 44 ( 10 ): 2016 - 2020 . (in Chinese)
赵权利 , 孙红月 , 王智磊 , 等 . 承压水对平推式滑坡的作用分析 [J]. 岩石力学与工程学报 , 2012 , 31 ( 4 ): 762 - 769 .
Zhao Q L , Sun H Y , Wang Z L , et al . Influence of confined water on translational landslide [J]. Chinese Journal of Rock Mechanics and Engineering , 2012 , 31 ( 4 ): 762 - 769 . (in Chinese)
赵权利 , 孙红月 , 尚岳全 , 等 . 承压水孔压的时空变化对边坡稳定性影响 [J]. 浙江大学学报(工学版) , 2013 , 47 ( 8 ): 1366 - 1372 .
Zhao Q L , Sun H Y , Shang Y Q , et al . Effect of temporal and spatial variation of pore water pressure induced by confined groundwater on slope stability [J]. Journal of Zhejiang University(Engineering Science) , 2013 , 47 ( 8 ): 1366 - 1372 . (in Chinese)
赵权利 . 缓倾滑坡中承压水作用机理研究 [D]. 杭州 : 浙江大学 , 2013 .
Zhao Q L . Research on mechanism of confined groundwater in the gently inclined landslide [D]. Hangzhou : Zhejiang University , 2013 . (in Chinese)
赵权利 , 尚岳全 , 支墨墨 . 平推式滑坡启动判据的修正 [J]. 吉林大学学报(地球科学版) , 2014 , 44 ( 2 ): 596 - 602 .
Zhao Q L , Shang Y Q , Zhi M M . Modification of the start-up criterion of translational gliding landslide [J]. Journal of Jilin University(Earth Science Edition) , 2014 , 44 ( 2 ): 596 - 602 . (in Chinese)
Jiao J J . A confined groundwater zone in weathered igneous rocks and its impact on slope stability [C]∥ Proceedings of the International Symposium on Hydrogeology and the Environment . Wuhan : [s.n.] . 2000 : 1 - 8 .
Jiao J J , Wang X S , Nandy S . Confined groundwater zone and slope instability in weathered igneous rocks in Hong Kong [J]. Engineering Geology , 2005 , 80 ( 1-2 ): 71 - 92 .
Li W C , Dai F C , Wei Y Q , et al . Implication of subsurface flow on rainfall-induced landslide: a case study [J]. Landslides , 2016 , 13 ( 5 ): 1109 - 1123 .
郜泽郑 . 镇江地区降雨诱发滑坡机制与降雨阈值研究 [D]. 南京 : 南京大学 , 2019 .
Gao Z Z . Study on the mechanism and rainfall threshold of rainfall-induced landslide in Zhenjiang area [D]. Nanjing : Nanjing University , 2019 . (in Chinese)
刘羊 . 间歇性蠕动滑坡中暂时性承压水的作用机理研究 [D]. 南京 : 南京大学 , 2019 .
Liu Y . Research on mechannism of temporary confined groundwater in the intermittent creep landslide [D]. Nanjing : Nanjing University , 2019 . (in Chinese)
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