基于离散元模拟的注浆材料与混凝土界面剪切特性分析

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中图分类号：U454;TQ314.2 文献标志码：A文章编号：1001-5922（2025）10-0082-04

Analysis of shear characteristics of grouting material and concrete interface based on discrete element simulation

JIANG Yuke1²，WANG Kaixuan³，LI Zhenyu4， SONG Longfei4

（1. CCCC Tunnel and Bridge（Nanjing）Technology Co.，Ltd.，Nanjing 211800，China; 2.Tunnel Maintenance Technology Research Center，CCCC Infrastructure Maintenance Group Co.，Ltd.，Nanjing 211800，China;3. China Academy of Safety Science and Technology，Beijing 1Ooo12，China; 4.School of Water Conservancy and Transportation，Zhengzhou University，Zhengzhou 450o01，China）

Abstract：The interface between grouting material and tunnel segment concrete is easy to produce shear failure due to the influenceofload，dislocation，setlementandother factors.Inorderto studythe meso-process and mechanismof shear failure atthe interface between grouting material and concrete，the discrete element analysis method was used to set up 16 groups of working conditions for shear simulation，and the influence of normal stress and shear rateonthe shear characteristics of the interface was analyzed.The results showthat the shear process can be divided into elastic shear stage，plastic deformation stage，pre-peak transition stage and shear softening stage.With the increaseof shear rate，the shear strength of the interface decreases moreslowlyunder the same normal stress.At the same shear rate，the shear strength of the interface is approximately linear with the normal stress.

Key words： tunnel engineering;foamed polymer;discrete element simulation;shear strength

目前，注浆材料主要为聚氨酯、水泥浆液水泥-水玻璃类浆液[3和丙烯酸盐4等，但受应力松弛、管片错台等因素的影响，材料的防水性能大幅度下降5。（剩余5346字）