摘要
为应对不同条件下的施工要求,曲线顶管技术越来越多地被应用到地下管道铺设工程中。曲线顶管因管节接头处存在开口,导致曲线管节相较于直线顶管存在应力分布不均的现象。且曲线顶管管节端部和中部应力分布是不同,由于管节接头处只能提供受压,不能提供受拉,因此管节端部只存在压应力;管节中部截面,上方混凝土受拉,下方混凝土受压,因此,既存在压应力,又存在拉应力。结合材料力学中断面核理论对曲线顶管管节之间的应力进行分析,并对管节端部和中部的应力进行公式推导估算。并在南水北调配套大兴支线施工第十三标段中对22^(#)至23^(#)曲线段特制3根顶管,以便获得实测压应力和拉应力,与理论公式进行比较。
In order to meet the construction requirements in different conditions,curved pipe jacking technology is more and more applied to underground pipeline laying engineering.Compared with straight pipe jacking,curved pipe joint has uneven distribution of stress due to the opening at its joint joint.The stress distribution of the end and the middle of the curve jacking pipe is different.Because the joint of the pipe can only provide compression,not tension,there is only compressive stress at the end of the pipe.In the middle section of the pipe section,the concrete above is strained and the concrete below is compressed,so there is both compressive stress and tensile stress.Combined with the core theory of section in the mechanics of materials,the stress between the curve jacking pipe joints is analyzed,and the stress at the end and middle of the pipe joints is estimated by the formula.
作者
王梓任
王硕
赵恺宁
WANG Zi-ren;WANG Shuo;ZHAO Kai-ning(Beijing Jinhe Water Construction Group Co.LTD,Beijing 102206,China)
出处
《辽宁工业大学学报（自然科学版）》
2023年第4期256-259,267,共5页
Journal of Liaoning University of Technology(Natural Science Edition)
关键词
曲线顶管应力
管节中部
管节端部
断面核理论
curvilinear jacking stress
middle section
pipe end
core theory of section
作者简介
王梓任(1985-),男,辽宁沈阳人,高级工程师,本科。
