充水溶洞隧道围岩位移特征及影响因素研究  

Research on the Surrounding Rock Displacement Characteristic and Influencing Factors of Water-filled Karst Cave Tunnel

作　　者：管鸿浩[1] 

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《铁道工程学报》2016年第8期59-65,共7页Journal of Railway Engineering Society

摘　　要：研究目的:随着交通事业的加速发展,在可溶岩地区修建隧道工程将会越来越多,岩溶水问题将越来越突出,成为影响线路方案、隧道施工和运营安全的重要因素。目前岩溶水对隧道围岩稳定性影响的研究还较少。本文以某高速公路岩溶隧道为背景,结合工程实践,对侧部存在充水溶洞的隧道在施工过程中的围岩位移及影响因素进行研究。研究结论:(1)隧道开挖后,隧道靠近溶洞侧侧向水平位移要远大于远离溶洞侧的水平位移,其中拱腰处水平位移最大;(2)当溶洞与隧道的净距逐渐增大时,隧道和溶洞特征位置的位移值均有不同程度的减小;(3)当溶洞尺寸逐渐变大时,隧道和溶洞特征位置的水平位移均有不同程度的增大且呈线性变化,竖向位移影响较小;(4)当溶洞内水压逐渐增大时,隧道特征位置的水平位移均有不同程度的增大且呈倒置的抛物线型变化,竖向位移呈线性变化但幅度较小;(5)本研究成果可为穿越富水岩溶区隧道的设计、施工和科研提供参考。Research purposes ： With the accelerated development of transport, the construction of tunnel engineering in karst areas will be more and more, and karst water problem will become increasingly acute and is an important factor which impacts line program, tunnel construction and operational safety. Currently the research on karst water stability of surrounding rock of the tunnel is still less. Taking a highway karst tunnel as the background, combined with engineering practice, the presence of surrounding rock displacement and influencing factors of water - filled cave tunnels during the construction process were studied in this paper. Research conclusions： （ 1 ） After the tunnel is excavated, the horizontal displacement of surrounding rock near the karst cave is larger than that of away from the karst cave. The horizontal displacement of hance of the tunnel is largest. （2）With increase of the distance between karst cave and tunnel, the displacement of tunnel ＂s and karst cave ＂s characteristic positions minished in varying degrees. （3）With increase of karst cave dimension, the horizontal displacement value of karst cave~ and tunnel~ characteristic positions increased in varying degrees, which presents a linear relationship, and vertical displacement has little influence. （4）With increase of hydraulic pressure, the horizontal displacement of tunnel characteristic positions increased in varying degrees, which presents a reversed parabola relationship, and vertical displacement changed in little degrees, which presentss a linear relationship. （5）The research results can provide references for the design, construction and research of tunnel through the areas of water - rich karst area.

关 键 词：隧道工程 充水溶洞 围岩位移特征 影响因素 数值模拟 

分 类 号：U452[建筑科学—桥梁与隧道工程]