【摘要】：為了研究山嶺隧道洞口段圍巖變形特征,以貴州省晴隆-興義高速公路登攀隧道為工程依托,對(duì)洞口段圍巖變形展開研究,通過(guò)對(duì)現(xiàn)場(chǎng)圍巖變形進(jìn)行監(jiān)測(cè)和數(shù)據(jù)處理,分析了山嶺隧道洞口段圍巖變形的時(shí)間與空間效應(yīng),進(jìn)而對(duì)山嶺隧道洞口段圍巖變形時(shí)間特征和空間特征展開研究。研究結(jié)果表明:隧道開挖引起圍巖變形具有明顯的時(shí)間效應(yīng)和空間效應(yīng),監(jiān)測(cè)斷面圍巖變形在開挖后歷經(jīng)8 d和27 m~30 m后穩(wěn)定;山嶺隧道洞口段圍巖變形具有明顯的空間特征,周邊收斂值在時(shí)間軸上規(guī)律性較差,但累計(jì)變形量較小,對(duì)隧道圍巖穩(wěn)定性影響有限;洞口段拱頂沉降與地表沉降時(shí)間歷程曲線有明顯的規(guī)律,但累計(jì)變形量、分布特征與圍巖本身屬性緊密相關(guān),地域差異性較大。
[Abstract]:In order to study the deformation characteristics of surrounding rock in the entrance section of Shanling tunnel, based on the climbing tunnel of Qinglong-Xingyi Expressway in Guizhou Province, the deformation of surrounding rock in the entrance section of the tunnel is studied, and the deformation of surrounding rock in the field is monitored and processed. The time and space effects of surrounding rock deformation in the entrance section of mountain tunnel are analyzed, and then the temporal and spatial characteristics of surrounding rock deformation in the entrance section of mountain tunnel are studied. The results show that the deformation of surrounding rock caused by tunnel excavation has obvious time effect and spatial effect, and the deformation of surrounding rock of monitoring section is stable after 8 days and 27 m 鈮，

本文編號(hào)：2490031