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高边坡爆破开挖会引起岩土体结构松弛、强度降低,进一步促进裂隙的产生和发展,对边坡的安全稳定有不利影响。针对溢洪道高边坡开挖施工工程地质条件差、施工作业环境复杂敏感的特点,采用现场爆破试验、爆破振动跟踪监测等技术手段,结合开挖边坡岩体地质力学条件及现场边坡开挖振动情况分析,确定爆破振动控制标准为2.0cm/s,并根据爆破振动衰减规律计算得到不同高程的开挖爆破最大允许单响药量,以指导边坡爆破施工,从而有效地控制了爆破振动破坏范围,确保了边坡开挖工程安全、快速、高效的进行。
Blasting and excavation of high slopes will cause the structure of rock and soil body to relax, reduce the strength and further promote the generation and development of cracks, which will adversely affect the safety and stability of the slope. In view of the poor geological conditions and complex and sensitive construction environment of excavation engineering of high slope of spillway, by means of field blasting test, blasting vibration tracking and monitoring and other technical means, combined with geotechnical conditions of rock slope excavation and on-site slope excavation Vibration analysis to determine the blasting vibration control standard 2.0cm / s, and according to the law of blasting vibration attenuation calculated the maximum allowable single-shot dose of excavation blasting to guide the slope blasting construction, thus effectively controlling the blasting vibration Destruction of the scope to ensure that the slope excavation project safe, fast and efficient.