西华大学学报(自然科学版)
西華大學學報(自然科學版)
서화대학학보(자연과학판)
JOURNAL OF XIHUA UNIVERSITY(NATURAL SCIENCE EDITION)
2015年
1期
92-97
,共6页
影响因素%岩质斜坡%稳定性评价%赤平投影%有限元%离散元
影響因素%巖質斜坡%穩定性評價%赤平投影%有限元%離散元
영향인소%암질사파%은정성평개%적평투영%유한원%리산원
influence factors%rock slope%stability evaluation%stereographic projection%finite element%discrete element
以成兰铁路某隧道出口斜坡为例,将地层岩性、岩体结构与地质构造、工程开挖、震动作用和地貌条件确定为影响稳定性的主要因素;运用巴顿模型,获得主要结构面等效抗剪强度参数并应用于赤平投影分析;分别采用有限元和离散元软件对斜坡洞口开挖及地震作用下的稳定性进行数值模拟分析。综合多种方法的分析结果作出稳定性评价。最后给出了基于影响因素的隧道洞口岩质斜坡稳定性评价的几点认识。
以成蘭鐵路某隧道齣口斜坡為例,將地層巖性、巖體結構與地質構造、工程開挖、震動作用和地貌條件確定為影響穩定性的主要因素;運用巴頓模型,穫得主要結構麵等效抗剪彊度參數併應用于赤平投影分析;分彆採用有限元和離散元軟件對斜坡洞口開挖及地震作用下的穩定性進行數值模擬分析。綜閤多種方法的分析結果作齣穩定性評價。最後給齣瞭基于影響因素的隧道洞口巖質斜坡穩定性評價的幾點認識。
이성란철로모수도출구사파위례,장지층암성、암체결구여지질구조、공정개알、진동작용화지모조건학정위영향은정성적주요인소;운용파돈모형,획득주요결구면등효항전강도삼수병응용우적평투영분석;분별채용유한원화리산원연건대사파동구개알급지진작용하적은정성진행수치모의분석。종합다충방법적분석결과작출은정성평개。최후급출료기우영향인소적수도동구암질사파은정성평개적궤점인식。
Lithology, structure and tectonic of the rock mass, excavation, vibration and geomorphologic conditions are regarded as main factors to affect stability of portal rock slope. Barton model is utilized to work out equivalent shear strength parameters of main structural plane, which are applied in stereographic projection analysis. The slope stability in condition of excavation and earthquake action is simulated with finite element and discrete element software. The stability evaluation is demonstrated with the case of tunnel portal slope in Chenglan railway. Some suggestions are presented on the tunnel portal rock slope stability evaluation based on the influ-encing factors.