摘要
天然边坡在开挖过程中,由于爆破动力作用破坏了原岩的完整性,造成边坡岩体发生局部或整体层裂而形成边坡岩体松动带,使岩体的自稳能力降低(边坡抗滑力减小),甚至可能导致路堑滑坡或坍塌。而目前在边坡设计中没有考虑由于开挖爆破地震效应对边坡稳定性的影响,从而造成个别边坡在开挖过程中或施工完成后产生滑动。通过现场爆破地震效应试验,根据应力波在岩体中的传播规律和运动规律,得出岩体内质点振动加速度和不同部位岩体平均加速度对边坡稳定性的影响效果,给出了水平和垂直方向振动加速度作用下边坡安全系数的计算公式,并通过了实例验证,从而为边坡稳定性设计提供了有力依据。
In the excavation process of natural slope, as a result of blasting power damage the integrity of the original rock, resulting in the occurrence of rock slope, in part or in whole formed by spallation slope with loose rock, cause rock solid steady ability to reduce （reduce the slope against sliding force）, and may even lead to landslides or the collapse of cutting. At present, the design of the slope does not take as a result of excavation blasting seismic effect on the impact of slope stability, resulting in the excavation process of an individual slope or sliding after the completion of construction. Through on-site testing the effect of blasting seismic, according to stress wave propagation in rock mass movement of law and come to rock the body mass in different parts of the seismic acceleration and average acceleration of the rock slope stability of the results, given the horizontal and vertical under the direction of seismic acceleration slope formula for calculating the safety factor and the adoption of an example, so as to slope stability provided a strong basis for design.
出处
《山地学报》
CSCD
北大核心
2010年第2期141-146,共6页
Mountain Research
基金
国家自然科学基金(40671195
40771004)
国家科技支撑计划林业项目(2006BAD26B08-03)
国家科技支撑计划项目(2007BAD46B08)~~
关键词
边坡
爆破地震效应
稳定性分析
slope
blasting seismic effect
stability analysis
