【作者】 刘大刚；

【导师】 王明年；

【作者基本信息】 西南交通大学 ， 桥梁与隧道工程， 2007， 博士

【摘要】 近年来，随着公路交通事业的迅猛发展，公路隧道建设规模也越来越大，公路隧道的大量涌现，给当今隧道技术发展带来了一个新的机遇与挑战。在诸多尚待解决或完善的隧道技术中，围岩分级一直以来都是工程科研、设计及施工人员共同关注的重要课题之一。通常而言，一个完整的围岩分级系统应该包括设计阶段围岩分级和施工阶段围岩分级两部分内容，而现行公路隧道围岩分级中目前还缺乏一个有效、完善的施工阶段围岩分级体系，导致施工中遇到了许多实践上的困难和难题，因此，本文针对施工中亟待解决的几个重点问题，同时兼顾施工阶段工程实际需要，对施工阶段岩体围岩亚级分级体系进行了系统地研究，其工作具体体现在以下几个方面：1．通过国内外大量岩体围岩分级指标资料的调研和统计分析，建立了比较符合工程实际的施工阶段岩体围岩亚级分级指标体系，并对该指标体系中各指标施工阶段的获取方法或手段进行了相应的介绍，其中重点对数码摄像技术获取围岩结构面发育程度参数方法进行了理论研究和分析，实现了分级指标的现场快速获取，从而大大提高了现场围岩分级工作的效率。2．以双车道公路隧道岩体围岩稳定性为研究基础，提出了岩体围岩自稳性等级划分方法和判据及其自稳跨度值的确定方法，通过数值试验和相似模型试验等研究手段获取了各级岩体围岩的自稳跨度数值，并根据基本稳定跨度值进行了岩体围岩亚级级别的划分，由此建立施工阶段岩体围岩亚级分级理论标准。3．基于现场采集的大量围岩样本数据信息，应用数量化理论Ⅱ类问题即数量化判别方法理论，提出了施工阶段岩体围岩亚级级别定量判定方法，从而提高了围岩亚级分级结果的客观性和可靠性。4．依据双车道公路隧道岩体围岩自稳性研究成果，通过国内外大量隧道资料的调研统计分析及相关数值验算，确定了一套比较符合工程实际的双车道公路隧道各亚级岩体围岩设计参数，内容包括开挖方法、辅助工法、支护类型、结构型式和初期支护参数等，对现场施工具有重要的现实指导意义。5．研究了现场亚级分级指标获取、亚级级别判定等相关问题的程序实现方法，并以Visual C++为开发平台编制了相应的软件系统，提高了现场围岩亚级分级的自动化程度。通过大量工程实例验证，表明了本文施工阶段岩体围岩亚级分级体系理论的正确性及该软件的可靠性和实用性。更多还原

【Abstract】 In recent decades, along with the development of road transportation rapidly, the scale of road tunnel construction is larger and larger. The road tunnel comes forward in great numbers, brought a new opportunity and challenges for technical development of tunnel nowadays.In numerous still need solve or perfect tunnel technique, the rock classification is one of the important topics attented by all engineering research, design and construction personnels for a long time. An integrated rock classification system should include two stages of design and construction usually. However, the current rock classification for road tunnel still lack a valid and perfect system in construction stage which gives construction many difficult problems. So, aims at a few important problems that need urgent solution and factual engineering demands, this paper makes the systematic study on the rock sub-classification system in construction stage. The material research work is summarized as following:1. Through investigation and statistical analysis on domestic and international great deal of rock classification index data, this paper builds up a rock sub-classification index system which accords with engineering fact comparatively. Then, it introduces each index’s measuring means. In these means, it makes the theoretics study and analyse on rock mass discontinuities’ parameters measurement based on digital photogrammetry specially to make in-suit fast measuring come true and improve work efficiency at the same time.2. Based on rock stability of double roadway road tunnel, this paper puts forward the partition method and criterion of rock stability grading and confirm method of self-steady span. Then, it also acquires the numerical value of each grading rock self-steady span by numerical simulation and similar model experimentation and makes rock sub-level partition, thereby, a theory standard is established for rock sub-classification in construction stage.3. Depend on the great of in-suit rock data information, based on theory of quanification, this paper puts forward the quantitative determining method for rock sub-classification in construction stage which improves the result’s objectivity and reliability.4. Based on the research production of rock stability of double roadway road tunnel, through investigation, statistical analysis and numerical simulation checking computations on domestic and international great deal of tunnel data, this paper confirms the correlative design parameters of each sub-level rock of double-roadway road tunnel, the content include excavation methods, assistant methods, support types, structure forms and earlier timbering parameters etc, which is of great guidance significance for construction.5. This paper makes study on the program realization method about correlative problems which include in-suit classification index measurement and sub-level determining and compiles a software system based on Visual C++ to improve automatization of rock sub-classification. Finally, it proves that the theory of rock sub-classification system in construction stage is correct and the software is reliable and applied by the great of engineering examples.更多还原