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SLIPLININO IN INDIANA

机译：印第安纳州滑脂

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INFRASTEEL, A PERMANENT CULVERT REHABILITATION SYSTEM, was used by Midwest Mole of Greenfield, Indiana, to slipline a 245-ft long, 144-in. diameter failing corrugated metal pipe (CMP) culvert under US 31 in Miami County, Indiana. US 31 is a heavily traveled north-south thoroughfare in Indiana, so the Indiana Department of Transportation determined that sliplining was the best option for repairing the failing structure. The project was bid in the spring of 2017, and construction work was performed in the fall of 2017. Precision Pipe's InfraSteel culvert liner is made from smooth wall carbon steel, in custom shapes and sizes specifically for each culvert failure site. InfraSteel has extra copper in the steel for added corrosion resistance and is made in wall thicknesses from Vi to 2 in. thick, which provides superior structural integrity. InfraSteel's design life is calculated by adding sacrificial steel, for each year of desired life expectancy, to the wall thickness required to handle the existing load bearing requirements. The existing structure for this site was round and reasonably straight, however, it did have a dip in the middle of the run which was taken in consideration when the size was determined. The other major sizing consideration is the hydraulic capacity of the liner. InfraSteel's Manning's coefficient is .012, and inlet and outlet control features are available but were not required for this project.
机译：印第安那州格林菲尔德的Midwest Mole使用INFRASTEEL（永久弯曲修复系统）对245英尺长（144英寸）的滑移线进行打滑。美国印第安纳州迈阿密县（Miami County）的美国31号以下直径最大的波纹金属管（CMP）失效。美国31号公路是印第安纳州南北交通繁忙的通道，因此印第安纳州交通部确定，衬砌是修复失效结构的最佳选择。该项目于2017年春季进行投标，并于2017年秋季进行了施工工作。Precision Pipe的InfraSteel涵洞衬套由光滑的壁碳钢制成，具有针对每个涵洞破坏部位的定制形状和尺寸。 InfraSteel的钢中含有额外的铜，以提高抗腐蚀性，壁厚从Vi到2 in。厚，可提供出色的结构完整性。 InfraSteel的设计寿命是通过将每年预期寿命的牺牲钢添加到满足现有承重要求所需的壁厚中来计算的。该站点的现有结构是圆形的，并且相当笔直，但是，在运行中间确实有一个下降，确定大小时会考虑到这一点。另一个主要的尺寸考虑因素是衬套的液压能力。 InfraSteel的曼宁系数为0.012，并且可以使用入口和出口控制功能，但此项目不需要此功能。

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