高填方段大孔径波纹管涵结构受力性能试验研究

发布时间：2019-03-12 08:39

【摘要】：基于原位观测试验,通过对不同填土高度的管涵荷载及变形、管涵及涵周土体应力分布的全程量测,对不同填土高度下大孔径波纹管涵的力学性能进行了深入分析。结果表明,管顶始终处于压应力状态,从管顶向下至90度范围截面承载逐渐转为拉应力,而从90度截面至管底,波谷截面主要承受拉力,并至管底达到最大值,而波峰截面则由拉应力向压应力转变,至管底为压应力状态。波纹管涵应力及变形均随着填土高度逐渐增长,但其增速逐渐变缓,并最终趋于稳定,其大小均满足波纹管涵的使用要求。而涵顶与涵底土压力测试数据表明,波纹管涵土压力值与规范方法计算值存在较大差异,且差异随填土高度的增加进一步加大,表明高填方段的管涵土压力计算应进行适当折减。
[Abstract]:Based on in-situ observation tests, the mechanical properties of corrugated pipe culverts with large diameter under different height of fill are analyzed by full-range measurement of load and deformation of pipe culverts with different height of fill and stress distribution of pipe culverts and soil around culverts. The results show that the top of the pipe is always in the state of compressive stress, and the loading capacity of the section from the top to the 90 degree gradually changes to the tensile stress, while from the 90 degree section to the bottom of the pipe, the wave valley section mainly bears the tensile force and reaches the maximum value to the bottom of the pipe. The peak section changes from tensile stress to compressive stress to the bottom of the pipe. The stress and deformation of corrugated pipe culverts increase gradually with the height of fill, but their growth rate gradually slows down and finally tends to be stable. The size of corrugated pipe culverts meets the requirements of the use of corrugated pipe culverts. The soil pressure test data of culvert top and bottom show that there is a great difference between the soil pressure value of corrugated pipe culvert and the calculation value of code method, and the difference increases further with the increase of fill height. It is indicated that the calculation of soil pressure of pipe culvert in high fill section should be reduced properly.
【作者单位】：湖南省娄衡高速公路建设开发有限公司;
【分类号】：U449.83

【相似文献】