| 汪东林.沟埋式矩形涵洞土压力及填土等沉面分析[J].安徽建筑大学学报,2022,30(): |
| 沟埋式矩形涵洞土压力及填土等沉面分析 |
| Study on the equal settlement plane of filling and earth pressure of trench-buried culvert |
| 投稿时间：2021-09-03 修订日期：2021-10-08 |
| DOI： |
| 中文关键词: 沟埋式涵洞 土压力系数 竖向沉降 剪应力 |
| 英文关键词: trench-buried culvert earth pressure coefficient vertical settlement shear stress |
| 基金项目:2021年度安徽省住房城乡建设科学技术计划项目(2021-YF39)与2019年度安徽高校自然科学研究项目(KJ2019JD02)联合资助 |
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| 中文摘要: |
| 填方工程中填土在涵洞附近形成土拱，导致现有关于涵洞土压力理论计算值与实测值往往相差较大。为了探讨涵洞对填方工程变形的相互影响，对沟埋式涵洞顶部土压力及填土变形进行了对比分析，计算结果表明：沟埋式涵洞内土柱的竖向沉降小于外土柱的竖向沉降；沟埋式涵洞顶部土压力系数均大于1，且土压力系数随沟槽宽度的增大而逐渐增大，当沟槽宽度为涵洞宽度10倍时，土压力系数已接近最大值；土压力系数随沟槽深度的增大而呈线性减小规律，当沟槽深度大于涵洞高度的2倍以上时，涵顶土压力可按上覆土重进行计算；涵洞侧壁受到的剪应力随着沟槽宽度的增加而增加，随着沟槽深度的增加而呈线性减小规律。 |
| 英文摘要: |
| In the filling engineering, the fill forms a soil arch near the culvert, resulting in a large difference between the existing theoretical calculated value and the measured value of culvert earth pressure. In order to discuss the mutual influence of culvert on filling engineering deformation, the earth pressure at the top of ditch buried culvert and filling deformation are compared and analyzed.The results show that the vertical settlement of the soil column above culvert is less than the vertical settlement of the external soil column. The earth pressure coefficient at the top of culvert is bigger than 1.0, and the earth pressure coefficient increases with the increase of trench width. When the trench width is 10 times the of the culvert width, the earth pressure coefficient is close to the maximum value. The earth pressure coefficient at the top of culvert decreases linearly with the increase of trench depth. When the trench depth is more than 2 times the culvert height, the earth pressure of the culvert is equal to the overlying soil weight. The shear stress on the side wall of culvert increases with the increase of trench width, and decreases linearly with the increase of trench depth. |
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