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对急曲率曲线钢顶管的结构形式和管节接口应力进行了研究。将目前常见的顶管接口和曲线钢顶管工程结合,提出了适用于急曲率小口径曲线顶进的新型钢顶管铰接管接头形式,通过铰接管的启曲能实现钢顶管的曲线顶进。通过对管节接口应力进行研究,解释了管节接口会出现应力过大的现象。若不采取减阻措施,管节接口必然出现应力过大现象,并提出改善接口应力的措施,首次将新型铰接管结构形式成功应用于罗泾支线原水工程曲线钢顶管工程中,证实了新型钢顶管管节间的结构形式的稳定性和适用性,证实了改善接口应力的有效性,对今后的类似工程有重要的借鉴意义。
The structure of the steel pipe with an acute curvature curve and the stress of the pipe joint were studied. Combining the common pipe jacking and curve steel pipe jacking project, a new type of steel pipe jacking pipe joint suitable for jacking of small curvature curve of acute curvature is proposed. The curve top of the steel pipe jacking can be realized by the opening of the hinge pipe Enter. Through the study of the joint stress of the pipe joints, the phenomenon that the joint of the pipe joints will be over stressed is explained. If we do not take the drag reduction measures, the pipe joint will inevitably appear excessive stress phenomenon, and put forward measures to improve the interface stress, for the first time the new type of articulated pipe structure successfully applied in Luojing branch of the original water project curve steel pipe project, confirmed the new The stability and applicability of the structural forms of the steel pipe joints demonstrate the effectiveness of improving the interface stress and have important referential significance for similar projects in the future.