上海国土资源
上海國土資源
상해국토자원
2012年
3期
45~49
,共null页
交通振动 地基土 应力传递 衰减规律 瑞利波
交通振動 地基土 應力傳遞 衰減規律 瑞利波
교통진동 지기토 응력전체 쇠감규률 서리파
traffic vibration; foundation soil; stress transfer; attenuation characteristic; Rayleigh wave
通过对道路交通荷载下50m和80m深孔的现场振动测试,在时域和频域上分析了有车工况与无车工况下场地孔中位移随深度的衰减规律。结果表明：峰值频率随深度增大而逐步减小,在40m左右深度,峰值衰减因子接近0.2,振动衰减已很明显;与弹性半空间瑞利波的衰减规律对比发现,水平向位移衰减较弹性半空间瑞利波衰减慢,但随着深度增大,衰减因子逐渐接近弹性半空间的瑞利波衰减曲线;垂直向位移衰减因子随着深度逐步减小,且比弹性半空间瑞利波衰减得快。
通過對道路交通荷載下50m和80m深孔的現場振動測試,在時域和頻域上分析瞭有車工況與無車工況下場地孔中位移隨深度的衰減規律。結果錶明：峰值頻率隨深度增大而逐步減小,在40m左右深度,峰值衰減因子接近0.2,振動衰減已很明顯;與彈性半空間瑞利波的衰減規律對比髮現,水平嚮位移衰減較彈性半空間瑞利波衰減慢,但隨著深度增大,衰減因子逐漸接近彈性半空間的瑞利波衰減麯線;垂直嚮位移衰減因子隨著深度逐步減小,且比彈性半空間瑞利波衰減得快。
통과대도로교통하재하50m화80m심공적현장진동측시,재시역화빈역상분석료유차공황여무차공황하장지공중위이수심도적쇠감규률。결과표명：봉치빈솔수심도증대이축보감소,재40m좌우심도,봉치쇠감인자접근0.2,진동쇠감이흔명현;여탄성반공간서리파적쇠감규률대비발현,수평향위이쇠감교탄성반공간서리파쇠감만,단수착심도증대,쇠감인자축점접근탄성반공간적서리파쇠감곡선;수직향위이쇠감인자수착심도축보감소,차비탄성반공간서리파쇠감득쾌。
This article discusses the results of field vibration testing in 50 m and 80 m deep boreholes to assess the effects of road traffic load on displacement attenuation relationships in both time and frequency domains in underground soils, focusing on traffic density. This research indicates that peak frequencies are gradually reduced with increasing depth, with peak attenuation factor close to 0.2 at depth of about 40 m and coincident decrease in vibration attenuation. When compared to the attenuation curve in an elastic Rayleigh wave half-space, horizontal displacements decrease slowly but attenuation factors gradually migrate towards the attenuation curve with increasing depth, with vertical displacement reducing at a larger rate than the attenuation curve with increasing depth.
