膨胀性围岩不良地质隧道设计与施工的策略分析

Strategic Analysis on Design and Construction of Bad Geological Tunnel in Expansive Surrounding Rock

近年来,由于我国公路建设的快速发展,尤其是公路不断的向山区延伸,公路隧道建设工程急剧增多,公路隧道的建设也进入了一个新的发展时期。因此,针对不良地质路段的隧道设计与施工,显得越来越重要。伴随着经济的高速增长,我国的隧道建设也大规模的展开。在修建隧道中,常遇到一些不利于施工的特殊地质地段。如膨胀土围岩,黄土,溶洞,断层,松散地层,流沙,岩爆等。在开挖,支护和衬砌过程中,由于各种因素的影响都可能发生土石坍塌,坑道支撑变形,衬砌结构断裂,严重影响施工进度,安全和质量。隧道穿越含有瓦斯的地层,更严重地威胁着施工安全。在隧道施工中,对于不良地质的处理关系到隧道整体施工安全和质量。为做好不良地质处理,本文联系实际,对不良地质隧道施工的特征特点做了简要分析,并就不良地质隧道设计与施工策略展开了探究,以期能为相关隧道工程带来些许帮助。

In recent years,due to the rapid development of highway construction,especially the continuous extension of highways to mountainous areas,the construction of highway tunnels has increased dramatically,and the construction of highway tunnels has entered a new period of development.Therefore,in view of the bad geological section of tunnel design and construction,it is more and more important.With rapid growth of economy,the tunnel construction in China is on a large scale.In the construction of tunnel,often encounter some not conducive to the construction of the special geological location.Such as expansive soil surrounding rock,loess,karst cave,fault,loose stratum,quicksand,rock burst,etc.In the excavation,support and lining in the process,due to the influence of various factors are possible collapse of earth-rock,deformation of tunnel support and lining structure fracture,seriously affect the construction schedule,safety and quality.The tunnel crossing the stratum containing gas,more seriously threaten the construction safety.In tunnel construction,the treatment of bad geology is related to the safety and quality of tunnel construction as a whole.In order to deal with good job of bad geological treatment,this paper makes a brief analysis of the characteristics of bad geological tunnel construction,and probes into the design and construction strategy of bad geological tunnel,in order to bring some help to the relevant tunnel engineering.