高填方大直径钢波纹管涵洞力学特性

摘要 为研究高填方大直径钢波纹管的力学特性，选取萍洪高速AK0+485处钢波纹管涵洞作为研究对象，通过现场测试以及数值模拟提取管体上部不同填土高度情况下管体的应变、土压力以及管体的横向和竖向变形.通过对数据进行处理分析得出测试数值与模拟数值变化趋势基本一致，管中环向应变以及管顶轴向应变分别大于其他部位的应变.管顶土压力较小，管体下45°位置的土压力较大，主要是由于大直径钢波纹管的柔性以及混凝土支撑的限制作用导致.而对于无混凝土支撑情况下的数值模拟显示，无混凝土支撑可减小应力集中现象以及大部分测点位置的土压力.
Abstract：In order to study the mechanical properties of large-sized corrugated steel pipe under high filling， the corrugated steel pipe culvert in AK0+485 of Pinghong highway was selected as research object. The strain， soil pressure， and horizontal and vertical deformation of the pipe were extracted under the condition of different filling heights from field tests and numerical simulation. By data processing and analyzing， test value and numerical simulation have the same change tendency，and the circumferential strain in middle part and axial strain in top part are greater than other parts of the pipe. Soil pressure at the top part is lower and at the bottom 45° part is higher， which is caused by the flexibility of large-sized corrugated steel pipe and restriction of concrete supporting. Simulations show that the stress concentration and soil pressure in every part of the pipe can be decreased under the condition of no concrete supporting.