摘要
目前城市市政工程埋地管道的安全与防护是管理部门日益关注的重点,论文基于有限元数值模拟了静载作用下格栅加筋防护埋地管道的力学响应,综合对比研究了筋材埋深、长度和加筋层数等因素对埋地管道的力学与变形影响,数值计算结果表明:综合管道应力、变形和加载板极限承载力,确定了顶层筋材最佳埋深和长度分别为0.4倍加载板宽度和5倍管道外径;同等条件下,增加格栅加筋层数,地表加载板极限承载力显著增加,且在距中心点相同距离时,底层筋材的应力最大,顶层筋材的应力相对较小。
Safety and sustainability of buried pipes has become more important due to the increase of the reported pipe failure incidents. Based on the numerical study in the paper, the performance of buried pipes reinforced with geogrids was investigated to understand the effect of embedment depth, length of geogrid and layers of reinforcement on the deformation characteristics of the buried pipes. The results indicated that the optimum burial depth and length of geogrid for the upper layer of geogrid were 0.4 times width of loading plate and 5 times outer diameter of pipe, respectively. The bearing capacity at the surface above the pipe will increase with the increase of the number of layers of geogrid, and the stress of the bottom layer of geogrid is higher than the upper layer above buried pipes.
作者
李斌
于洪兴
肖成志
LI Bin;YU Hongxing;XIAO Chengzhi(Tianjin highway Engineering Design Research Institute,Tianjin 300170,China;School of Civil Engineering and Transportation,Hebei University of Technology,Tianjin 300401,China)
出处
《河北工业大学学报》
CAS
2019年第4期91-96,共6页
Journal of Hebei University of Technology
基金
天津市交通运输科技发展计划项目(2018-09)
河北省自然基金(E2018202108)
关键词
埋地管道
加筋防护
数值模拟
筋材
静载
buried pipes
reinforced protection
numerical simulation
reinforcement
static loading
