不同影响因子对落石运动距离影响的试验研究  

Experimental Study on the Distance of Rock Falls Under Different Influencing Factors

作　　者：宋波[1,2] 郝晓敏[1,2] 黄帅[1,2] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]强震区轨道交通工程抗震研究北京市国际科技合作基地,北京100083

出　　处：《四川大学学报（工程科学版）》2016年第6期1-7,共7页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家自然科学基金资助项目(51178045);高速度铁路轨道技术国家重点实验室开放课题基金资助项目(2012SKL01)

摘　　要：通过振动台试验研究在不同地震波峰值加速度、正弦波频率及坡形下不同形状与尺寸落石的运动距离,明确地震作用下边坡落石对坡脚建(构)筑物的影响。研究表明:随着地震波峰值加速度增加,落石运动距离呈现增大趋势,且球形落石运动距离最大,圆柱体形和方形次之,长方体形最小。随着边坡坡角的增加,不同形状落石运动距离先增大后减小,当边坡角度为50°时达到最大值;随着边坡坡高增加,不同形状落石运动距离不断增大。随着地震波频率增大,落石运动距离先减小后增大,且不同形状落石对其最大运动距离的影响从大到小依次为球形、圆柱体形、方形、长方体形,通过概率统计得出落石在距离坡脚1.6H区间内分布最多。为坡脚建(构)筑物的防护设计提供参考。Through the shaking table test, the distance of different shape and size rock falls under different peak acceleration seismic, sine wave frequency and slope shape was studied, and the influence of rock falls on the buildings at the slope foot was cleared. The re- sults showed that the distance of rockfall increased with the increase of seismic peak acceleration, where the maximum distance was spherical rockfall, cylindrical, the square rockfall was inferior to the spherical rockfall, and the minimum distance was rectangle rockfall. With the slope angle, the distance of rockfall first increased and then decreased, and the maximum distance of rockfall appeared when the angle of the slope reached 50°. The distance of rackfall increased with the increase of slope height. With increase of sine wave frequency ,the distance of rock falls decreased first and then increased. And the maximum distance from largest to smallest were spherical, cylindrical, square and rectangle rockfall. Based on the probability statistics method, the maximum distance of rockfall distributed within the 1.6H, which provides reference for protection design of the structures at slope foot.

关 键 词：振动台试验 地震 落石运动距离 落石形状和尺寸 坡形 

分 类 号：TU4[建筑科学—土工工程]