摘要
In order to analyze the effects of backfill materials, geometries and slab setting on the settlement of bridge approach embankment, scale model was built based on the structural characteristics of bridge approach embankment, and scale model tests were carried out under different conditions. The results show that when graded gravels were selected as the backfill materials, the effect of setting approach slab to reduce the differential settlement is more prominent. When lime soils were selected as the backfill material, approach slab can moderate the longitudinal settlement slope. When using different backfill materials, the ultimate settlement of the positive trapezoidal backfill geometries is less than that of the inverted trapezoid, and the backfill geometries have little effect on the settlement slope.
为了研究不同回填材料、回填结构及桥头搭板的设置对路桥过渡段沉降的影响,本文根据路桥过渡段的结构特性,进行了不同条件下的路桥过渡段缩尺模型试验。结果表明,使用级配碎石作为回填材料进行路桥过渡段路基回填时,设置搭板对减小路桥过渡段差异沉降的效果更为明显;使用石灰土时,设置搭板可以缓和桥台后路线纵向不同位置的沉降坡度。使用不同回填材料时,正梯形回填结构最终沉降量均小于倒梯形,且回填结构对沉降坡度的影响不大。
作者
ZHANG Jiu-peng
LIU Tao
PEI Jian-zhong
LI Rui
ZOU Dao-guang
ZHANG Yu-qing
张久鹏;刘涛;裴建中;李蕊;邹道光;张裕卿(School of Highway,Chang’an University,Xi’an 710064,China;China Railway Second Academy Engineering Group Co.Ltd.,Chengdu 610036,China;National Engineering Laboratory of Highway Maintenance Technology,Changsha University of Science&Technology,Changsha 410114,China;Aston Institute of Materials Research,Engineering Systems&Management Group,Aston University,Birmingham B47ET,UK)
基金
Project(51978068) supported by the National Natural Science Foundation of China
Project(2018YFE0103800) supported by the National Key R&D Program of China
Project(2017M620434) supported by the China Postdoctoral Science Foundation
Project(310821173501) support by the Special Fund for Basic Scientific Research of Central College of Chang’an University, China。
