转体施工转动体系不平衡力矩测试方法研究

发布时间：2018-01-26 18:57

本文关键词： 转体施工转动体系不平衡力矩测试方法　出处：《公路工程》2014年03期 　论文类型：期刊论文

【摘要】：桥梁转体施工中保证转动体系重心位于转轴中心较小的范围以内对顺利转体十分重要,表现为转动体系以转轴中心的刚体不平衡力矩尽量小。然而实际施工中不可能做到转轴中心两侧完全对称,特别是转体前采取支架现浇方式施工的桥梁均存在不同程度的不平衡力矩,需要通过一定方法进行不平衡力矩测试,用于转体前的配重设计。探讨了转动体系不平衡力矩的测试方法,提出了利用墩柱应变(应力)检测不平衡力矩的方法,并以实际某转体桥梁为实例,采用上述测试方法与转动体系称重试验结果进行了对比,结果显示利用墩柱应变(应力)检测不平衡力矩方法可以准确地获得转动体系偏心大小。方法简便易行,可大大减少称重所需的人力物力投入,节省施工时间,为今后转体施工不平衡力矩测试提供借鉴。
[Abstract]:It is very important for the smooth rotation to ensure that the center of gravity of the rotating system is located within the small range of the center of the shaft in the construction of the bridge rotation. It is shown that the rotation system is as small as possible in the rigid body unbalance moment at the center of the shaft. However, it is impossible to achieve complete symmetry between the two sides of the center of the shaft in the actual construction. Especially, the unbalance moment exists in different degree when the bridge is constructed by cast-in-place support before turning, so it is necessary to test the unbalanced moment by certain method. The method of measuring unbalance moment of rotating system is discussed, and the method of measuring unbalance moment by strain (stress) of pier column is put forward, and the actual rotating bridge is taken as an example. The test results are compared with those of the rotating system. The results show that the eccentricity of rotating system can be accurately obtained by using the method of measuring unbalanced moment by using the strain (stress) of pier column. The method is simple and convenient, and can greatly reduce the manpower and material resources needed for weighing and save the construction time. It provides reference for the test of unbalance moment of rotary construction in the future.
【作者单位】：内蒙古交通设计研究院有限责任公司;武汉理工大学交通学院;
【基金】：内蒙古自治区交通科技计划项目(NJ-2012-18)
【分类号】：U445.465
【正文快照】： 0引言桥梁转体施工中转动体系重心通过转轴中心,称为中心承重,以中心承重进行转体,支墩可以完全脱离滑道,极大地减少了转体的摩阻力,可以使得转体过程十分顺利。为此转体施工前,需要对围绕转动轴中心的不平衡力矩进行测试。并以此为依据,进行科学配重,使不平衡力矩处于较小的

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