基于可拓学理论的黄土隧道围岩分级方法研究

发布时间：2018-04-13 01:32

本文选题：黄土隧道 + 围岩分级　；参考：《地下空间与工程学报》2017年03期

【摘要】：为解决现有黄土隧道围岩分级方法理论依据不足的问题,在总结分析黄土隧道围岩力学性能、构造特性评价指标的基础上,利用可拓学理论建立关联函数,解决各评价指标之间的融合问题,对黄土隧道围岩分级做一些探索性的工作,以期为黄土隧道的设计与施工提供理论依据。研究结果表明:基于可拓学理论的黄土隧道围岩分级方法综合考虑了黄土的强度性质、变形性质、各向异性、构造特性,使得其分级结果更加客观、准确;利用可拓围岩分级方法求得的掌子面围岩的关联度不仅可判定掌子面围岩级别,而且其数值大小可定量反映掌子面围岩质量好坏程度;可拓围岩分级结果与现场围岩级别分类的结果基本一致,存在的分级误差基本属于"亚级"之间的差异,未出现"跳级"现象;且该结果与规范中围岩分类结果相比,其准确度更高。
[Abstract]:In order to solve the problem of insufficient theoretical basis of existing surrounding rock classification methods of loess tunnel, on the basis of summarizing and analyzing the mechanical properties and evaluation indexes of structural characteristics of loess tunnel surrounding rock, the correlation function is established by using extension theory.In order to provide theoretical basis for the design and construction of loess tunnel, this paper solves the problem of fusion of evaluation indexes, and makes some exploratory work on the classification of surrounding rock of loess tunnel in order to provide a theoretical basis for the design and construction of loess tunnel.The results show that the classification method of loess tunnel surrounding rock based on extension theory considers comprehensively the strength, deformation, anisotropy and structural characteristics of loess, which makes the classification results more objective and accurate.The correlation degree of the surrounding rock of the face surface can not only determine the grade of the surrounding rock of the face face, but also quantitatively reflect the quality of the surrounding rock of the face face by using the method of extension surrounding rock classification.The classification result of extensible surrounding rock is basically consistent with that of surrounding rock classification on site, and the classification error is basically the difference between subgrade, and there is no "jump" phenomenon, and this result is compared with the result of surrounding rock classification in the code.Its accuracy is higher.
【作者单位】：长安大学公路学院;山西省交通科学研究院黄土地区公路建设与养护技术交通行业重点实验室;
【基金】：山西省交通运输厅科研项目(2013-1-3,2015-1-18) 交通运输部应用基础研究项目(2014319771190)
【分类号】：U452.12

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