Chapter 1 Introduction 1.1 Research Status of Sand-pebb|e Soil's Mechanical Properties 1.2 The Research Status of the Mechanical Behaviors of Sand- pebble Surrounding Rock 1.3 Research Status of Granular Matter Mechanics Chapter 2 Macroscopic and Microscopic Mechanical Properties of Sand-pebble Surrounding Rock of Tunnels 2.1 The Macroscopic Properties of Sand-pebble Soil 2.2 Analysis on the Influence of Mesoscopic Parameter of Discrete Element on Sand-pebble Macroscopic Mechanical Properties 2.3 Mesoscopic Physical Mechanical Parameters of Discrete Element of Sand-pebble Surrounding Rock Chapter 3 Deformation Failure Characteristics of Road-tunnel Surrounding Rock in Sand-pebble Strata 3.1 The Collapse Failure Mechanism of the Tunnel of Sand-pebble Surrounding Rock 3.2 Tunnel-excavation Earth Surface Sedimentation Rules of Sand-pebble Strata with Different Working Conditions 3.3 Deformation Rules of Sand-pebble-strata Deep-buried Tunnel with Different Moisture Contents Chapter 4 The Interaction Mechanism of Sand-pebble-tunnel Surrounding Rock and Supporting Structures 4.1 Macroscopic and Mesoscopic Characteristics of Sand-pebble Surrounding Rock in Tunnels 4.2 The Research on the Calculation Modes of Sand-pebble Surrounding Rock Loads 4.3 Mechanical Behavior Research on Sand-pebble Granary Effect 4.4 The Research on the Mechanical Behavior of Sand-pebble Surrounding Rock Tunnels Reference