双排小管径管替代单孔大管径涵洞的可行性分析

FEASIBILITY ANALYSIS OF DOUBLE-ROW SMALL DIAMETER PIPE REPLACING SINGLE-HOLE LARGE DIAMETER CULVERT

为解决大直径玻璃钢夹砂管的应用受路基标高和管顶填土高度限制的问题,对小管径双排玻璃钢夹砂管涵洞和大管径单排玻璃钢夹砂管涵洞的力学性能、管涵成本和工程费用等方面进行对比分析,论证小管径双排管替代大直径管道的可行性。研究结果表明:路基设计标高相同条件下,小管径双排管涵洞能够获得更加充足的覆土高度,从而显著削弱外荷载对管涵产生的应力效应,替代方案能够保证管道在低应力状态下服役,对延长管道的使用寿命有利;在相同工况下,单排管与双排管的应力值满足各自抗压强度和抗拉强度的要求,小管径双排管涵洞更具备良好的安全储备;小管径双排管涵洞较大管径单管涵的生产成本和工程费用每延米可节约1172.39元,经济效益显著。

In order to solve the problem that the application of large diameter FRP pipe is limited by subgrade elevation and top filling height,the mechanical properties,culvert cost and engineering cost of small diameter double row FRP pipe culvert and large diameter single row FRP pipe culvert are compared and analyzed,and the replacement of small diameter double row pipe is demonstrated.The results show that:under the same subgrade design elevation,small diameter double-row pipe culverts can obtain more sufficient soil cover height,which significantly weakens the stress effect of external loads on the culvert.The alternative scheme can ensure the service of the pipeline under low stress state,which is beneficial to prolong the service life of the pipeline.Under the same working conditions,the stress values of single-row pipe and double-row pipe meet the requirements of their compressive strength and tensile strength,and the culvert with small diameter and double-row pipe has better safety reserve.The production cost and engineering cost of the culvert with small diameter and double-row pipe can be saved by 1172.39 yuan per meter,and the economic benefit can be achieved significant.