1.Introduction 1.1 Feature of Underground Engineering Theoretical Analysis Design of underground structure (different from above- ground structures,for the Experiences complicated geological conditions and interactions in structure-ground system) In-situ Measurement 百年同海3 TONGII UNIVERSITY3 Design of an underground structure (different from above-ground structures, for the complicated geological conditions and interactions in structure-ground system) 1. Introduction 1.1 Feature of Underground Engineering Design of underground structure (different from above￾ground structures, for the complicated geological conditions and interactions in structure-ground system) Theoretical Analysis Experiences In-situ Measurement