隧道建设
隧道建設
수도건설
TUNNEL CONSTRUCTION
2015年
1期
41-45
,共5页
隧道工程%块体理论%围岩稳定性分析
隧道工程%塊體理論%圍巖穩定性分析
수도공정%괴체이론%위암은정성분석
tunnel engineering%block theory%stability of surrounding rock
为了解决隧道工程施工中围岩稳定性分析这一工程难题，依托某在建公路隧道，基于地质素描与数理统计分析工作，精细化描述节理产状、间距、填充物、黏聚力等特征，并利用三维重构技术建立基于节理特征的隧址区地层模型，最后利用块体理论检索了无支护、有支护工况下隧道临空面潜在的关键块体，分析了滑移形式和安全系数，并对支护参数进行了优化，得知原设计支护强度富余，适当优化后仍可确保结构安全。
為瞭解決隧道工程施工中圍巖穩定性分析這一工程難題，依託某在建公路隧道，基于地質素描與數理統計分析工作，精細化描述節理產狀、間距、填充物、黏聚力等特徵，併利用三維重構技術建立基于節理特徵的隧阯區地層模型，最後利用塊體理論檢索瞭無支護、有支護工況下隧道臨空麵潛在的關鍵塊體，分析瞭滑移形式和安全繫數，併對支護參數進行瞭優化，得知原設計支護彊度富餘，適噹優化後仍可確保結構安全。
위료해결수도공정시공중위암은정성분석저일공정난제，의탁모재건공로수도，기우지질소묘여수리통계분석공작，정세화묘술절리산상、간거、전충물、점취력등특정，병이용삼유중구기술건립기우절리특정적수지구지층모형，최후이용괴체이론검색료무지호、유지호공황하수도림공면잠재적관건괴체，분석료활이형식화안전계수，병대지호삼수진행료우화，득지원설계지호강도부여，괄당우화후잉가학보결구안전。
The occurrence,spacing,filler,cohesive force and other characteristics of the joints of the surrounding rock of a highway tunnel under construction are described in detail on basis of geological sketches and mathematical statistics work,so as to solve the problems in the analysis on the stability of the surrounding rocks in tunnel construction.Then the model of the strata in the tunnel site,which is based on the joint properties,is established by means of three-dimen-sional reconstruction technology.Finally,the potential critical blocks in the free face under non-support condition and under support condition are examined by means of block theory,the slip mode and the safety factor are analyzed,and the supporting parameters are optimized.It is concluded that the strength of the designed support is higher than needed and that the safety of the structure can also be guaranteed when the supporting parameters are appropriately optimized.
