| 峨汉高速廖山隧道岩溶发育规律及其工程效应浅析 |
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| 引用本文： | 李芳涛, 李华明, 胡志平, 陈南南, 晏长根. 峨汉高速廖山隧道岩溶发育规律及其工程效应浅析[J]. 中国岩溶, 2020, 39(4): 592-603. doi: 10.11932/karst20200415 |
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| 作者姓名： | 李芳涛 李华明 胡志平 陈南南 晏长根 |
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| 作者单位： | 1.长安大学建筑工程学院;;2.四川乐汉高速有限责任公司;;3.长安大学建筑工程学院/长安大学地下结构与工程研究所;;4.长安大学公路学院 |
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| 基金项目： | 四川省峨汉高速工程科研专项(LH-HT-45) |
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| 摘 要： | 峨汉高速廖山隧道地处西南岩溶区，岩溶地质灾害频发。在开展岩溶区地质环境调研的基础上，厘清隧址区岩溶发育特征，浅析隧址区岩溶发育规律及其控制因素，最后探究了岩溶发育的工程效应。结果表明：隧址区岩溶形态多样，呈现多尺度、多样化、密集性发育的特征；岩溶在控溶因素的耦合作用下表现出显著的选择性、方向性、分层性、不均匀性以及系统连贯性等规律，其中地层岩性及其组合情况是物质基础，地形地貌与地质构造特征是主导条件，而水文地质条件是决定性因素；岩溶发育的工程效应表现在隧洞稳定性、岩溶涌水突泥和全寿命周期内的影响三个方面，不良岩溶地质体及岩溶富水空间的存在极易诱发洞身大变形、隧底岩溶塌陷等稳定性问题，以及局部静态岩溶水突出与湖水倒灌等涌水突泥灾害，甚至对隧道结构在运营期内的稳定性和耐久性造成不利影响。
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| 关 键 词： | 峨汉高速 岩溶隧道 发育规律 控制因素 工程效应 地质灾害 突水突泥 |
Features of karst development and geotechnical effects in the Liaoshan Tunnel on the E-Han expressway |
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| LI Fangtao, LI Huangming, HU Zhiping, CHEN Nannan, YAN Changgen. Features of karst development and geotechnical effects in the Liaoshan Tunnel on the E-Han expressway[J]. CARSOLOGICA SINICA, 2020, 39(4): 592-603. doi: 10.11932/karst20200415 |
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| Authors: | LI Fangtao LI Huangming HU Zhiping CHEN Nannan YAN Changgen |
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| Affiliation: | 1. School of Civil Engineering,Chang’an University;;2. Sichuan Lehan Expressway Co.,LTD;;3. School of Civil Engineering,Chang’an University/Underground Structures and Engineering Research Institute,Chang’an University;;4. Highway School,Chang’an University |
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| Abstract: | The Liaoshan tunnel on the E-Han expressway is located in a karst area of southwest China with frequent geological hazards. Based on the investigation of the geological environment in the karst area，this work clarified the characteristics of karst development in the tunnel site area，analyzed its law and controlling factors，and examined its effects on the site. The results show that the karst morphology in the tunnel site area is diverse，characterized by multiple scales，diversity，and dense development. The karst shows significant selectivity，directionality，layering，heterogeneity，and system coherence and other laws，in which stratigraphic lithology and its combination are the material basis，topographic features and geological structural characteristics are the dominant conditions，and hydrogeological conditions are the decisive factors. The engineering effects of karst development are mainly expressed in 3 aspects， the stability of the tunnel，karst gushing water inrush and effect of tunnel life cycle. The existence of bad karst geological bodies and karst water-rich spaces can easily induce stability problems such as large cave deformation and karst collapses at the bottom of the tunnel as well as local static karst water outbursts and lake water flood and mud flooding disasters，sometimes even affecting the stability and durability of the tunnel structure during the operation period. |
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| Keywords: | E-Han expressway karst tunnel development regularity controlling factors engineering effects |
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