The Basic Primciples of Self-bearing Protect of Foundation Soil

This paper proposes the protect-displacement curve of foundation soil based on the covergence constraint curle of the surrounding rock in underground engineering and the modern protect theory. This protect system dose not take soil as only load to protect structure, but take soil and structure as an organic whole. The aim of protect is not to'prop' the unstable soil, but to fully develop the self-bearing capacity of soil.