LUO Renyu,LI Qizhi,HUANG Yunjin,et al.Numerical simulation and safety analysis of foundation pit blasting based on PFC[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2023,62(05):107-114.
LUO Renyu,LI Qizhi,HUANG Yunjin,et al.Numerical simulation and safety analysis of foundation pit blasting based on PFC[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2023,62(05):107-114. DOI: 10.13471/j.cnki.acta.snus.2023B020.
Numerical simulation and safety analysis of foundation pit blasting based on PFC
Based on the Guangzhou-Dongguan-Shenzhen Intercity Railway Project, we use the discrete element method to simulate the blasting process of deep rock masses in foundation pits, and analyzes the safety of the surrounding environment. Firstly, the rationality of PFC simulation blasting was verified. Subsequently, reasonable geological microscopic parameters were obtained through uniaxial compression tests; and a two-dimensional foundation pit model was established to study the impact of ground disturbance from three perspectives, referring to different initial stresses, burial depths and the presence of cracks. The results indicate that:the greater the initial stress, the greater the corresponding ground velocity; the variation curve of ground velocity with the burial depth of explosives shows an upward parabolic shape; the presence of cracks can effectively reduce the peak ground velocity by 13%.
关键词
基坑爆破PFC爆破应力波速度监测预裂缝
Keywords
building pit blastingPFCblasting stress wavespeed monitoringpre-cracks
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