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| Research on the Dynamic Process Simulation of Rock Grouting Based on
Particle Flow |
| GENG Ping1，LU Zhi - kai1，DING Ti1，QUAN Qian - long2，YAN Qi - xiang1 |
| (1. Key Laboratory of Transportation Tunnel Engineering，Ministry of Education，Southwest Jiaotong University，Chengdu，
Sichuan 610031，China; 2. Tianjin Municipal Engineering Design V Research Institute，Tianjin 300051，China) |
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Abstract Abstract:Research purposes: Water outburst and mud outburst is easy to happen in tunnel excavation of the rich water area. Grouting is an effective preventive measure. According to the particle discrete element method，this paper studies
on the influence of grouting on tunnel in water rich area. Based on the dynamic simulation of the grouting process，this paper studies the grouting effect under different grouting pressure and grouting arrangement. The conclusions can provide reference for optimizing grouting arrangement.
Research conclusions:(1) Grouting pressure determines the grouting diffusion model. The penetration grouting turns to
the splitting grouting while grouting pressure increasing. (2)It is verified that splitting grouting is a process of compaction， splitting，re - compaction and re - splitting. ( 3 ) It is quite difficult for the slurry to enter into the center of the grouting hole when porous grouting. (4) Based on the research of this paper，the effect of splitting grouting is better than that of
penetration grouting. Splitting grouting can be used in tunnel project. Porous grouting may not always work. According
to geological conditions，reasonable arrangement of grouting holes and grouting sequence is essential. It is necessary to
avoid the weak rock points in the center of the hole grouting. (5) The research results can provide the reference for the layout principle of grouting hole and grouting quality control in the weak strata.
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Received: 24 June 2016
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2017, Vol. 34 
