桥梁桩基爆破近区地震波传播特性及应用研究

发布时间：2018-03-07 15:42

  本文选题：桥梁桩基　切入点：浅孔爆破　出处：《爆破》2014年03期 　论文类型：期刊论文

【摘要】：为研究桥梁桩基浅孔爆破地震波在爆源近区的传播特性及对邻近埋地天然气管道的影响,结合荣乌高速桥梁桩基爆破工程,现场布置与试验桩基边沿水平距离为L(2.2 m、3.2 m、5 m、9 m、15 m、21 m)的6个测点在不同的桩基深度H(12 m、14.5 m、15.5 m、18.2 m)下进行爆破试验。试验测试结果表明:随着水平距离的增大,水平径向和垂直方向的爆破振动速度呈现不同的变化趋势,且不同距离范围内,两者之间的大小关系也不相同;水平径向和垂直方向爆破振动速度随桩基深度的增加呈减小趋势,其中距离爆源越近,垂直方向振动速度减小趋势越明显;同等药量条件下,掏槽孔爆破振动远大于周边孔爆破振动。
[Abstract]:In order to study the propagation characteristics of seismic wave of shallow hole blasting in bridge pile foundation and its influence on nearby buried natural gas pipeline, the blasting engineering of pile foundation of Rong-Wu high speed bridge is studied. Blasting tests were carried out at 6 measuring points with horizontal distance of 2. 2 m ~ 3. 2 m ~ 3 ~ 5 m ~ 5 m ~ 9 ~ 9 m ~ 5 ~ 5 m ~ (21 m) and different pile foundation depths (H ~ (12) m ~ (14. 5) m ~ (15. 5) ~ 15. 5 m ~ (2) m). The test results show that: with the increase of horizontal distance, The blasting vibration velocities in horizontal radial direction and vertical direction show different trends, and the relationship between them is different in the range of different distances. The horizontal radial and vertical blasting vibration velocities decrease with the increase of pile foundation depth. The closer the blasting source is, the more obvious the vertical vibration velocity decreases. The blasting vibration of slot hole is much larger than that of peripheral hole blasting.
【作者单位】： 西南科技大学环境与资源学院;非煤矿山安全技术四川省高等学校重点试验室;
【基金】：四川省教育厅青年基金项目资助(项目编号:10zd1011)
【分类号】：O383;U443.15
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本文编号：1579910