摘要
运用耗散结构和熵变论分析了地下工程开挖后围岩应力变化和变形的非线性过程,并进一步用熵增加解释支护对围岩稳定的作用机理。岩体在变形的过程中出现了能量释放和熵减小,如果负熵大于围岩系统的熵,系统的熵增加为负,围岩系统从无序发展到有序,直到失稳。为了维护围岩的稳定性,在围岩系统中加入锚杆、喷浆等支护作为高熵物以提高系统的熵,能减小开挖前后应变能差异。
Dissipative structure and entropy change theory are applied to analyze the nonlinear process of stress change and displacement in surrounding rock and entropy increase is used to explain the mechanism of support stabilizing surrounding rock. Energy is released and entropy is decreased when the displacement of rocks occurs. If negentropy is more than the entropy of surrounding rock system, the entropy increase of system is negative. Surrounding rock will be developed from disorder to order and even instability. For keeping the stability of surrounding rock, rock bolts and shotcrete are used in surrounding rock system as high entropy substance to improve the entropy of system, which also decrease the difference of strain energy between before and after excavation.
出处
《隧道建设》
2005年第6期9-10,24,共3页
Tunnel Construction
关键词
地下工程
开挖
支护
耗散结构
熵变
underground engineering
excavation
support
dissipative structure
entropy change
