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路基裂缝病害是青藏公路上继沉降以后的第二大类型路基病害,此种类型的病害与公路左右两侧的太阳辐射差异密切相关。病害统计结果表明,发生在阳侧的路基纵向裂缝有22.5条,占总裂缝条数的70.0%,占路基纵向裂缝总长度的65.0%;其次,从病害发生路段的道路走向来看,路基纵向裂缝病害主要发生在走向为S90°、W S60°、W S30°、EW 0°和ES60°的路段,在走向为ES30°的路段上仅发生1条路基纵向裂缝。路基纵向裂缝与走向间的这一关系主要与高原上特殊的太阳辐射日变化规律和青藏公路主体走向有关。
The subgrade crack is the second largest type of subgrade disease after the subsidence on the Qinghai-Tibet Highway. The type of disease is closely related to the difference of solar radiation on the left and right sides of the highway. Disease statistics show that there are 22.5 longitudinal cracks on the sun side, accounting for 70.0% of the total number of cracks and 65.0% of the total length of longitudinal cracks in the embankment. Secondly, from the road direction of the road section where the disease occurs, Crack diseases mainly occurred in the sections of S90 °, W60 °, W30 °, EW0 ° and ES60 °, and only one longitudinal crack in the subgrade was observed on the section of ES30 °. The relationship between the longitudinal cracks and the strike of subgrade is mainly related to the special diurnal variation of solar radiation and the main body of Qinghai-Tibet Highway on the plateau.