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公路隧道围岩亚级物理力学参数研究 被引量:14

RESEARCH ON MECHANICAL PARAMETERS OF SUBCLASSIFICATION ROCK MASS OF HIGHWAY TUNNEL
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摘要 我国现行公路隧道围岩分级方法中部分围岩级别跨度较大,不能满足实际工程需要,据此对岩体围岩进行亚级分级。在此基础上,对各亚级围岩的物理力学参数取值范围进行研究。对于岩质围岩,首先根据亚级分级方法,确定出各亚级不同岩石坚硬程度、不同结构面构造和不同结构面结合程度的组合情况,对其进行数值计算,得到各组合情况下的物理力学参数值,然后结合实际调研资料,最终确定岩质围岩各亚级相应的物理力学指标取值范围。对于土质围岩,主要是通过大量现场试验及实际调研资料分析,获得围岩物理力学指标值,然后通过室内土工试验进行检验,最终确定土质各级围岩对应的物理力学指标值。 The surrounding rock classification is under discussion in the code for design of highway tunnel, and it can not satisfy the construction requirements. Therefore, the subclassification of surrounding rock is performed. Based on the subclassification, the physico-mechanical indices of rock subclassification are achieved. Firstly, based on the subclassification methods, the combination of rock masses with different hardnesses, tectonic structural planes and structural planes combination degree is presented. Numerical experiments on every combination are also performed. Using the experimental results, in-situ investigation and statistical analysis, certain physico-mechanical indices of subclassification rock mass are gained. As for the soil surrounding rock, two ways, i.e. field test and investigation, and statistics analysis, are employed to evaluate the physico-mechanical indices of surrounding rock masses; and then, the laboratory physico-experimental results are combined to determine the actual physico-mechanical indices of soil surrounding rock masses.
出处 《岩石力学与工程学报》 EI CAS CSCD 北大核心 2008年第11期2252-2259,共8页 Chinese Journal of Rock Mechanics and Engineering
基金 交通部西部交通建设科技项目(2004–318–000–3)
关键词 隧道工程 公路隧道 围岩亚级 力学指标 tunnelling engineering highway tunnel surrounding rock subclassification mechanical indices
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