交通荷载作用下路桥过渡段沉降影响的有限元分析

发布时间：2019-08-15 15:13

【摘要】：通过有限元分析,对影响交通荷载作用下的路桥过渡段沉降进行了研究。结果表明,随着路桥过渡段高度的增加,最大沉降值也随之增大,当桥墩台北回填过渡段原地面坡比从1∶3增加到1∶6时,沉降值有所增大,但变化幅度较小,坡比对路桥过渡段沉降影响非常小。随着路桥过渡段填料密度的增大,沉降值也呈增加趋势,同时路桥过渡段最大沉降点逐渐向桥台靠近。过渡段密度取值要适中,不要太大。沉降随变形模量的增大而不断减小,在倒梯形、正梯形过渡段末端,沉降量保持稳定趋势,最大沉降基本相同,过渡段的形式只对沉降速度有影响,对最终沉降量没有明显影响。路基沉降实测值要稍小于数值模拟值,两者具有一致的沉降趋势,数值分析方法预测路基沉降的一种有效方法,对路基沉降变化过程可很好进行反映。
[Abstract]:Through finite element analysis, the settlement of road and bridge transition section under traffic load is studied. The results show that with the increase of the height of the transitional section of the road and bridge, the maximum settlement value increases. When the original ground slope ratio of the Taipei backfill transition section of the pier increases from 1:3 to 1: 6, the settlement value increases, but the variation range is small, and the slope ratio has little effect on the settlement of the transitional section of the road and bridge. With the increase of packing density in the transition section of the road and bridge, the settlement value also increases, and the maximum settlement point of the transition section of the road and bridge is gradually close to the bridge platform. The density of the transition section should be moderate, not too large. The settlement decreases with the increase of deformation modulus. At the end of the inverted ladder and positive ladder transition section, the settlement maintains a stable trend, and the maximum settlement is basically the same. The form of the transition section only affects the settlement velocity, but has no obvious effect on the final settlement. The measured value of subgrade settlement is slightly less than the numerical simulation value, and the two have the same settlement trend. An effective method for predicting subgrade settlement by numerical analysis method can well reflect the change process of subgrade settlement.
【作者单位】：西昌学院工程技术学院;西华大学;
【基金】：四川省教育厅项目(16ZB0265);四川省教育厅项目(16ZB0261)
【分类号】：U416.1

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