李杨,童治豪,余敏,徐浩然,池寅

• 1:中铁十一局集团第二工程有限公司
• 2:武汉大学土木建筑工程学院

摘要(Abstract)：

针对传统扣压装置在无砟轨道自密实混凝土灌注过程中控制精度不足、易诱发底座板拉裂等问题，研发一种新型一体式门形框架扣压装置。通过现场灌注试验，系统考察不同轨道线型下防溢管高度对扣压装置与精调装置受力特性的影响，以及轨道板的上浮力和位移时程规律。试验结果表明：提高防溢管高度会增大轨道板上浮力和上浮位移；精调装置受力与扣压装置呈相反变化趋势，灌注初期精调装置承担轨道板自重，随着上浮力增大其受力逐渐减小，灌注完成后随上浮力回落而有所回升；与传统装置相比，新型扣压装置可将轨道板高程偏差控制在规范限值的30%以内，显著增强对轨道板的约束能力。结合有限元分析表明，在屈服荷载相当的条件下，新型扣压装置的初始刚度较传统装置提升453.3%,用钢量降低31.7%,同时单块轨道板所需扣压装置可由5道减至4道，且扣压装置安装时间缩短约40.0%。可见，新型扣压装置能够显著提升1次铺设精度与施工效率，具有重要的工程应用价值。

关键词(KeyWords)： 无砟轨道;扣压装置;上浮力;有限元模拟;受力特征

Abstract:

Keywords:

基金项目(Foundation): 中铁十一局集团公司科技创新项目(21-AII-06)

作者(Author): 李杨,童治豪,余敏,徐浩然,池寅

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