摘要
在隧道衬砌设计中,围岩压力通常是最主要的荷载,也是最难以确定的荷载。围岩压力的弹塑性理论研究也从未间断。经典的芬纳公式和修正芬纳公式由于塑性区半径的不确定性而限制了其实际工程应用。以修正芬纳公式为基础,考虑围岩与衬砌的共同作用,在未作塑性区体积不变的假设条件下,推导得到塑性区半径的理论计算方法,从而可以直接应用修正芬纳公式计算围岩压力,为隧道衬砌设计提供指导。
When designing tunnel lining, rock pressure is the most important load and very difficult to determine. The study uf rock pressure based on elasto plastic theory has been ongoing. Fenner formula and modified Fenner formula, la have not been used widely because they could not calculate the radius of plastic area. Based on modified Fenner formula, without any other assumptions, the calculation method of the radius of plastic area is deduced by considering the common role between surrounding rock and lining. Therefore it can be used in design.
出处
《土工基础》
2006年第2期73-76,共4页
Soil Engineering and Foundation
关键词
围岩压力
弹塑性理论
芬纳公式
衬砌设计
rock pressure, elastic-plastic theory, Fenner formula, tunnel lining design
