【摘要】 为探究穿越岩堆体隧道围岩骨架成拱效应和成拱高度演化规律，采用套筒试验和理论分析的方法，分析级配、含水量和填充土含量3个因素对骨架型岩堆成拱效应的影响规律，推导隧道洞顶到围岩自然平衡拱最大距离h与拱轴线水平计算距离的关系。研究结果表明：岩堆应力的传递路径非均匀分布，与约束有直接关系；级配、含水量和填充土含量3个因素对降低塌落拱高度的效果为：增加含水量>增加填充土含量>增加级配均匀性；隧道洞顶到围岩自然平衡拱最大距离h与拱轴线水平计算距离间的关系呈二次函数关系，与套筒试验结果一致，其二次项为应力平衡条件，h与岩堆咬合强度呈正相关，同时受到岩块相对粒径大小和压实度的影响。更多还原

【Abstract】 To explore the arching effect and arch height evolution law of the rock skeleton in talus surrounding the tunnel, a sleeve test and theoretical analysis were used to analyze the influence of gradation, water content, and filled soil content on the arching effect of the skeleton-type talus. The relationship between the maximum distance h from the tunnel crown to the natural equilibrium arch of the surrounding rock and the horizontal calculation distance of the arch axis was derived. The study shows that the stress transmission path of the talus is not uniformly distributed and is directly related to the constraints. The effectiveness of reducing the ground arch height among the three factors(grading, water content, and filled soil content) is as follows: increasing water content > increasing filled soil content > increasing gradation uniformity. The relationship between the maximum distance h from the tunnel crown to the natural equilibrium arch of the surrounding rock and the horizontal calculation distance of the arch axis is a quadratic function, being consistent with the sleeve test results. The quadratic term represents the stress equilibrium condition, and h is positively correlated with the interlocking strength of the talus, influenced by the relative grain size and compaction degree of the rock blocks.更多还原