岩质高边坡开挖施工的爆破振动监测与分析

发布时间：2018-11-19 11:27

【摘要】：基于量纲分析理论,分析影响边坡爆破振动速度相关物理量,推导并改进考虑高程因素影响的爆破振动速度预测公式,结合某石油储备基地山体边坡爆破开挖工程实地监测,对比分析改进公式与萨道夫斯基等传统经验公式对振动速度的预测精度。结果表明:改进公式对实测数据拟合的线性相关性为0.87,通过在公式中引入边坡坡度项(H/D)可大幅提高振动速度预测精度,垂直向质点峰值速度(PPVz)及峰值矢量和速度(PVS)预测值的最大相对误差分别为9.3%、12.7%,平均值分别为8.2%、9.8%,该公式用于边坡坡面质点振动速度预报切实、可行;PVS是坡面质点空间各方向振动速度时程信息的综合表征,综合涵盖质点3个方向振动速度分量对建(构)筑物的振动累积、破坏效应,选取PVS作为爆破振动安全控制指标更为合理。
[Abstract]:Based on dimensionality analysis theory, this paper analyzes the related physical quantities affecting the blasting vibration velocity of slope, deduces and improves the prediction formula of blasting vibration velocity considering the influence of elevation factors, and combines with the field monitoring of blasting excavation project of a mountain slope in a petroleum reserve base. The accuracy of prediction of vibration velocity by the improved formula and the traditional empirical formula, such as Sadolski, is compared and analyzed. The results show that the linear correlation between the improved formula and the measured data is 0.87. The prediction accuracy of vibration velocity can be greatly improved by introducing slope term (H / D) into the formula. The maximum relative error of the predicted values of vertical particle peak velocity (PPVz) and peak vector and velocity (PVS) are 9.3 and 12.7, respectively. The average value is 8.2 and 9.8, respectively. The formula is practical and feasible for predicting the velocity of particle vibration on slope surface. PVS is a comprehensive representation of the time history information of vibration velocity in different directions of particle space on slope surface, which covers the vibration accumulation and damage effect of vibration velocity components in three directions of particle on the building (building). It is more reasonable to select PVS as the safety control index of blasting vibration.
【作者单位】：武汉科技大学理学院;中铁港航—武科大爆破技术研究中心;
【基金】：国家自然科学基金项目(编号:51574184) 湖北省教育厅科学技术研究项目(编号:Q20161101) 武汉科技大学青年科技骨干培育计划项目(编号:2016xz018)
【分类号】：TD235

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