淤泥-岩石地层爆破临近给水管道振动特征  

Vibration Characteristics of Water Supply Pipeline near Rock Blasting in Silt-rock Strata

作　　者：尹涛 吉凌 李洪伟[2] 周传波[3] 何志伟[2] 郑长青 YIN Tao;JI Ling;LI Hong-wei;ZHOU Chuan-bo;HE Zhi-wei;ZHENG Chang-qing(School of Civil Engineering and Architecture,Anhui University of Science and Technology,Huainan 232001,China;Anhui Engineering Laboratory of Explosive Materials and Technology,Anhui University of Science and Technology,Huainan 232001,China;Faculty of Engineering,China University of Geosciences(Wuhan),Wuhan 430074,China;Zhuhai Baopoxin Research&Development Co.,Ltd.,Zhuhai 519099,China)

机构地区：[1]安徽理工大学土木建筑学院,淮南232001 [2]安徽理工大学安徽省爆破器材与技术工程实验室,淮南232001 [3]中国地质大学(武汉)工程学院,武汉430074 [4]珠海爆破新技术开发有限公司,珠海519099

出　　处：《爆破》2024年第3期222-231,共10页Blasting

基　　金：国家自然科学基金(41972286);安徽理工大学人才引进基金(13190208、13220458);安徽理工大学青年基金(QNYB2021-01);安徽理工大学安徽省爆破器材与技术工程实验室(AHBP2022B-05)。

摘　　要：盾构机通过淤泥-岩石地层时,可以在地面钻孔预先爆破破碎岩石,但是淤泥-岩石地层爆破产生的振动威胁爆区周围供水管道的安全。通过对爆破振动进行现场测试和数值模拟,首先验证爆破现场材料的物理和力学参数,然后研究了爆区附近供水管道的动态响应。得出如下结论:在管道轴向上,节点峰值速度(PPV)随着距爆炸源水平距离的增加而减小;在管道正上方地表沿管道轴向,节点峰值速度也随着距爆炸源水平距离的增加而减小;管道上节点峰值速度与管道上方地面的节点峰值速度之间存在函数关系。管道内壁最大PPV是最小PPV的3.97倍,管道内壁90°处的节点峰值速度最高,管道外壁最大PPV是最小PPV的1.03倍,管道外壁150°处的节点峰值速度最高,每个节点的PPV彼此不同,给水管道内壁PPV大于外壁,内壁PPV变化较大,但外壁PPV相对接近。单元的最大峰值有效应力是单元的最小峰值有效应力的4.06倍,在管道外壁240°~270°处单元的峰值有效应力最高。本研究的结论可以为确定爆区周围供水管道的安全性提供参考。Although the rock stratum can be blasted into blocks in advance on the ground when the shield machine bores through silt-rock strata,the vibrations generated by blasting in silt-rock strata will threaten the safety of the water supply pipeline near the blast area.Based on the blasting vibrations of field tests and numerical simulations,the physical and mechanical parameters of the materials on sites were verified,and the dynamic response of the water supply pipeline near the blast area was studied.The research results show that the peak particle velocity(PPV)decreases with the increase of the horizontal distance from the explosion source on the pipeline along the axial direction.The PPV also decreases with the increase of the horizontal distance from the explosion source on the ground surface above the pipeline along the axial direction,and there is a relationship between the PPVs of the pipeline and the PPVs of the ground surface above the pipeline.The maximum PPV of the pipeline′s inner wall is 3.97 times the minimum PPV,and the PPV is the highest at 90°of the inner wall.Meanwhile,the maximum PPV of the pipeline′s outer wall is 1.03 times the minimum PPV,and the PPV is the highest at 150°of the outer wall.Besides,the PPV of each node is different from that of the other,and the PPV on the pipeline′s inner wall is more significant than that on the pipeline′s outer wall.Although the PPV on the pipeline′s inner wall changes significantly,the PPV on the pipeline′s outer wall is relatively close.The maximum peak effective stress of the element is 4.06 times the minimum peak effective stress of the element,and the peak effective stress of the element is the highest at 240°~270°of the pipeline′s outer wall.

关 键 词：振动特征 供水管道 岩石爆破 淤泥-岩石地层 数值模拟 

分 类 号：TD236[矿业工程—矿井建设]