本文關(guān)鍵詞：深埋長隧洞三維地質(zhì)力學模型試驗研究　出處：《工程地質(zhì)學報》2017年02期 　論文類型：期刊論文

  更多相關(guān)文章： 三維地質(zhì)力學模型試驗 深埋長隧洞 三維彈塑性有限元 圍巖 相似材料

【摘要】：為了評價深埋長隧洞圍巖的穩(wěn)定性和隧洞間距的合理性,本文采用三維地質(zhì)力學模型試驗技術(shù),研究在高地應力、高外水壓力作用下,隧洞圍巖整體穩(wěn)定性以及相鄰洞室開挖的相互影響效應,并與三維彈塑性有限元數(shù)值計算結(jié)果進行對比驗證,研究結(jié)果表明:地質(zhì)力學模型試驗成果和數(shù)值計算結(jié)果基本一致,兩者得到的位移場、應力場、屈服區(qū)范圍都基本吻合。在高地應力、高外水壓力作用下,工程所在的Ⅲ類圍巖隧洞是可以安全成洞的。采用超載法進行試驗和計算可知,在Ⅲ類圍巖中極限超載安全系數(shù)k1.3,開挖隧洞對洞周圍巖的位移與應力影響區(qū)一般小于1倍洞徑范圍,隧洞的間距是合適的。
[Abstract]:In order to evaluate the stability of the surrounding rock and the rationality of the tunnel spacing, the three-dimensional geomechanical model test technique is used to study the effects of high ground stress and high external water pressure. The overall stability of surrounding rock and the interaction effect of adjacent cavern excavation are compared with the three-dimensional elastoplastic finite element numerical results. The results show that the results of geomechanical model test and numerical calculation are basically consistent, and the displacement field, stress field and yield zone range are basically consistent with each other under the action of high ground stress and high external water pressure. The tunnel of type 鈪，

本文編號：1423592