地应力渗流共同作用下洞室围岩加锚稳定的可靠度计算 English Version
Reliability assessment of rockbolt reinforced underground structures influenced by seepage and underground stress field
-
摘要: 考虑初始地应力、渗流荷载、岩体和锚杆 (索 )参数随机性影响 ,模拟施工开挖步序 ,提出了地下洞室围岩稳定的非线性随机有限元法和可靠度计算方法 ,在计算出可靠度的同时还可得出围岩和加锚元件变形、应力的均值和标准差 ,文末对某一实际工程进行了计算和分析 ,得出了若干有益的结论。Abstract: By taking account of the random variability of initial underground stress, seepage and material properties of both rockmass and rockbolt, based upon nonlinear stochastic finite element method, a method of reliability assessment is suggested for the safety of undergound structures. By using the method, the excavation procedure can be simulated step by step. The mean value and standard deviation of displacement and stress of both rockmass and rockbolt can also be conveniently obtained. Applications to a practical engineering project are given to demonstrate the suggested method. Some useful conclusions are also obtained.
-
Keywords:
- underground structure /
- stochastic finite element /
- reliability /
- nonlinear
计量
- 文章访问数:
- HTML全文浏览量: 0
- PDF下载量:
下载:
