郑军, 佘才高, 阎长虹, 张伯林. 2017: 南京地铁运营隧道变形的工程地质机理研究. 工程地质学报, 25(1): 199-208. DOI: 10.13544/j.cnki.jeg.2017.01.026
    引用本文: 郑军, 佘才高, 阎长虹, 张伯林. 2017: 南京地铁运营隧道变形的工程地质机理研究. 工程地质学报, 25(1): 199-208. DOI: 10.13544/j.cnki.jeg.2017.01.026
    ZHENG Jun, SHE Caigao, YAN Changhong, ZHANG Bolin. 2017: ENGINEERING GEOLOGICAL MECHANISM ON DEFORMATION OF NANJING METRO TUNNEL IN OPERATING. JOURNAL OF ENGINEERING GEOLOGY, 25(1): 199-208. DOI: 10.13544/j.cnki.jeg.2017.01.026
    Citation: ZHENG Jun, SHE Caigao, YAN Changhong, ZHANG Bolin. 2017: ENGINEERING GEOLOGICAL MECHANISM ON DEFORMATION OF NANJING METRO TUNNEL IN OPERATING. JOURNAL OF ENGINEERING GEOLOGY, 25(1): 199-208. DOI: 10.13544/j.cnki.jeg.2017.01.026

    南京地铁运营隧道变形的工程地质机理研究

    ENGINEERING GEOLOGICAL MECHANISM ON DEFORMATION OF NANJING METRO TUNNEL IN OPERATING

    • 摘要: 根据南京地区的工程地质与水文地质条件和多年隧道结构变形的监测资料,系统分析了不同地貌单元内隧道结构的变形特征,指出影响南京地铁隧道结构变形的主要工程地质因素是盾构隧道的软土问题和矿山法隧道的水文地质问题。结果表明:南京地区发育不同成因类型的软土,特别是长江河谷平原区软土,具有高孔隙比、高含水量、高压缩性、结构性强等特性,易导致隧道结构发生不均匀沉降。同时,穿越丘岗地区的矿山法隧道,一旦上游水源补给量超过正常值时,易导致隧道结构的衬砌逐渐抬升变形甚至引发运营中断事故。这一研究成果为南京地铁运营隧道结构变形分析提供了工程地质方面的理论基础,以便采取针对性的措施及时控制变形,确保安全营运。

       

      Abstract: This paper is based on the engineering geological and hydrogeological conditions of Nanjing and the long-term monitoring data on the deformation of structures. The tunnel deformation characteristics in various geomorphic units are analyzed systematically. The effects of soft soil on shield tunnels and the hydrogeological conditions on mining tunnels are determined as the major engineering geological factors dominating the deformation of Nanjing metro tunnel. There are various kinds of soft soils in Nanjing. They are formed in different sedimentary conditions. Those soft soils, typically those in the valley plain area of Yangtze River, are of high void ratio, great water content, high compressibility and sensitive structure. These properties can easily lead to uneven settlements of the shield tunnels. As to the mining tunnels through the hilly area, the lining structure can be uplifted by the groundwater gradually when the groundwater exceeds the normal water table. As a result, the operation of metro tunnels can be disrupted seriously. This study fosters the understanding of the deformation of metro tunnels from the engineering geological perspective, and offers a theoretical basis to monitor and control the deformation and ensuring the safety of the tunnels in operating.

       

    /

    返回文章
    返回