4結論

1)陡崖逆向臺階狀地貌形跡是危巖階段性演化的宏觀表象，通過對陡崖地貌形跡的分析可以反演危巖發育規律及斜坡動力演化過程。

2)陡崖上危巖從坡腳向坡頂及從臨空面向山體內部的發育過程即為危巖鏈式規律，包括從坡腳向坡頂逐漸崩落的多個微觀鏈和從臨空面向山體內部逐漸后退的宏觀鏈。陡崖坡腳巖腔的形成過程及其卸荷效應是三峽庫區危巖鏈式規律的孕育源。

3)危巖鏈式規律可分為簡單模式和復合嵌套模式，前者僅有一個宏觀鏈，后者包括兩個以上同時發育的宏觀鏈，三峽庫區危巖鏈式規律同時發育的宏觀鏈2~3個。

4)危巖鏈式規律揭示了三峽庫區內危巖演化的內在規律，是支撐、支撐-錨固聯合等危巖防治技術及萬州、云陽等長江兩岸大量崩積物形成機制的理論依據。進一步研究中，應重點研究危巖鏈式演化的時間進程及力學演繹，據此評判現有陡崖所處的演化階段及其整體和局部安全壽命。

參考文獻

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