CRTS Ⅲ型先张法预应力轨道板流水机组法生产工艺预应力筋张拉力锁紧方式研究
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摘要
在轨道板预应力筋采用单根同步张拉方式基础上,分析了插入楔块顶紧、皮带摩擦旋紧、螺母机械拧紧3种预应力筋张拉力锁紧方式的技术特点。为验证3种方式的锁紧效果,进行了有效张拉力对比试验,通过对不同锁紧方式时轨道板预应力筋有效张拉力的大量测试,得到了其概率分布特性。试验结果表明,采用螺母机械拧紧方式时,预应力筋有效张拉力离散性小,更有利于保证预应力筋有效张拉力及其均匀性。
On the basis of single synchronous tensioning method,technical characteristics of the three locking methods including wedge-inserting,belt-rubbing,nut-twisting for the tensile force of prestressed tendons were analyzed.In order to verify the effect of the three locking methods,comparison tests on the effective tensile force were carried out.Through a large number of tests on the effective tensile force of prestressed tendons by different locking methods,the corresponding probability distribution characteristics were obtained.The results showthat the dispersion of effective tensile force is small when the nut-twisting locking method was adopted,which is more benef icial to guarantee the effective tensile force and its uniformity.
On the basis of single synchronous tensioning method,technical characteristics of the three locking methods including wedge-inserting,belt-rubbing,nut-twisting for the tensile force of prestressed tendons were analyzed.In order to verify the effect of the three locking methods,comparison tests on the effective tensile force were carried out.Through a large number of tests on the effective tensile force of prestressed tendons by different locking methods,the corresponding probability distribution characteristics were obtained.The results showthat the dispersion of effective tensile force is small when the nut-twisting locking method was adopted,which is more benef icial to guarantee the effective tensile force and its uniformity.
引文
[1]王继军,江成,王梦,等.高速铁路无砟轨道双向先张预应力轨道板研究及实践[J].铁路技术创新,2015(2):44-48.
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[6]刘增杰,王继军,王梦,等.CRTSⅢ型先张轨道板制造翘曲变形控制措施研究[J].中国铁路,2016(10):48-52.
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[8]贾宝红.CRTSⅢ型轨道板先张流水机组法制造技术[J].铁道建筑,2017,57(5):127-130.
[9]杨永明.CRTSⅢ型轨道板流水机组生产工艺预应力筋张拉方式研究[J].铁道建筑,2017,57(7):119-122.
[2]王梦,王继军,赵勇,等.CRTSⅢ型先张预应力轨道板设计及制造技术[J].中国铁路,2017(8):16-20.
[3]王梦,杨全亮,王继军,等.高速铁路先张法轨道板预应力传递长度研究[J].中国铁道科学,2015,36(1):48-53.
[4]施成,王继军,王梦,等.先张法轨道板预应力传递长度的关键影响因素研究[J].铁道建筑,2015,55(2):96-100.
[5]林晓波.双向先张轨道板制造关键技术研究[J].高速铁路技术,2015,6(4):54-57.
[6]刘增杰,王继军,王梦,等.CRTSⅢ型先张轨道板制造翘曲变形控制措施研究[J].中国铁路,2016(10):48-52.
[7]栗恒满.高速铁路CRTSⅢ型先张轨道板质量控制关键技术探讨[J].铁道标准设计,2015,59(10):38-41.
[8]贾宝红.CRTSⅢ型轨道板先张流水机组法制造技术[J].铁道建筑,2017,57(5):127-130.
[9]杨永明.CRTSⅢ型轨道板流水机组生产工艺预应力筋张拉方式研究[J].铁道建筑,2017,57(7):119-122.