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大庆-锦西原油管道工程第四标段、第五标段位于辽宁省铁岭市地区,其中开原市、铁岭市穿越高等级公路6条,包括S303省道穿越2次,G102国道2次,穿越沈四高速公路、沈哈高速公路各1次,土质大部分为粉质砂土,人工掏土成功性差,容易造成路面下沉,严重的出现路面塌陷。通过研制管帽设施,杜绝了粉质砂土公路顶管容易出现塌陷的弊病,降低了套管轴向及中心偏差,大大提高了施工进度,在施工中起到了重要作用。
Daqing-Jinxi crude oil pipeline project fourth tenders, the fifth tenders located in Tieling City, Liaoning Province, where Kaiyuan City, Tieling City, crossing six high-level roads, including the S303 provincial highway crossing twice, G102 State Road 2, through Shen-Si Expressway, Shen Ha Expressway 1 times, most of the soil silty sand, artificial earthwork poor success, likely to cause road surface subsidence, serious road collapse. Through the development of the cap and cap facilities, the shortcomings of collapse of the top pipe of the silty sand road are avoided, the casing axial and center deviation are reduced, the construction progress is greatly enhanced, and the construction plays an important role.