摘要
动态设计方法对隧道工程的重要性不言而喻。然而,利益分配与协调管理机制的不完善、岩土体的复杂多变特性,致使隧道工程的动态设计仍处于尝试阶段、相关理论亦不成熟。基于理论分析与试点工程总结,针对节理发育地层,将隧道支护动态设计方法划分为预分析、支护参数的初步调整、节理特征的精细化描述、支护参数的优化分析4个步骤,并明确各阶段的实施要点。依托井冈山、桦树墕等隧道,开展试点工程,阐述动态设计方法的实施流程与要点,分析其应用成效。结果表明,基于动态设计方法提出的支护方案与实际围岩情况吻合,经济安全性更为合理,该方法已在江西井睦高速井冈山隧道、内蒙古榕乌高速桦树墕隧道、窑沟隧道及贵州独平高速的多条在建公路隧道建设过程中推广应用,获得良好成效。
Obviously,observational method is very important for tunnel design. However,we also need to improve related theories greatly and promote more and more pilot projects for imperfections of benefits,management and complexion of rock mass. By summarizing and analyzing engineering applications,the paper puts forward key points of the dynamic design method for tunnel under jointed rock,which including four steps： preanalysis,primary adjustment,description of joints features and optimization based on fine model. Then,we guide the design and construction of Jing Gangshan Tunnel Hua Shuyan Tunnel according to the above steps. Results show that,economic security can be guaranteed greatly by using observational method to design tunnels through bad geotechnical section. Finally,observational method has got a mass-application in Jing Gangshan Tunnel in Jiangxi Provence,Hua Shuyan Tunnel,Yao Gou Tunnel in Inner Mongolia and under construction tunnels in Guizhou,achieving good results.
出处
《地下空间与工程学报》
CSCD
北大核心
2017年第2期416-421,共6页
Chinese Journal of Underground Space and Engineering
基金
江西省交通运输厅科技项目(2011C0061)
内蒙古交通厅科技项目(NJ-2010-14)
国家自然科学基金(51278377)
关键词
公路隧道
动态设计
支护参数
节理特征
road tunnel
observational method
support system
joints characteristics
