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钱塘江定向钻穿越工程是浙江省重点工程——镇海炼化至杭州康桥成品油管道工程的一部分,是整个工程的重点、难点之一。钱塘江定向钻穿越工程位于浙江省杭州市境内,穿越水平距离为2308m,主河槽最低点管道埋深为14.7m,穿越曲率半径为350m。入土点设在东岸,入土角为9°12＇;出土点设在西岸,出土角为5°15＇。穿越管道规格为D273.1×6.4mm、材质为L290直缝管,采用环氧粉末喷涂加强级防腐,采用定向钻穿越专用补口热收缩带进行补口。试压介质为清水,强度试验压力为
Qiantangjiang directional drilling through the project is a key project in Zhejiang Province - Zhenhai Refining and Chemical to Hangzhou Kangqiao product pipeline project is part of the whole project focus, one of the difficulties. Qiantangjiang directional drilling through the project is located in Hangzhou, Zhejiang Province, the horizontal distance of 2308m, the lowest point of the main channel buried depth of 14.7m, the radius of curvature through the 350m. The site of entry is located on the east coast with an angle of 9 ° 12 ’. The site of the excavation is located in the West Bank with an angle of 5 ° 15’. Through the pipe specifications for the D273.1 × 6.4mm, material for the L290 straight seam pipe, the use of epoxy powder coating enhanced anti-corrosion, the use of directional drilling through the special mouth heat shrinkable belt fill mouth. Pressure test medium water, strength test pressure