Experimental Study on Lateral Resistance of Optimized Ⅲc Sleeper with Different Frame Types
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摘要: 为对标准Ⅲc型轨枕进行外形优化及揭示轨枕优化前后道床横向阻力特性，针对Ⅲc型轨枕特定部位增设混凝土加宽（加厚）块，形成3种框架式轨枕，结合道床横向阻力测试实验，分析对比不同道床断面形式下（砟肩宽度300 mm堆高0 m；砟肩宽度500 mm堆高0 m；砟肩宽度500 mm堆高150 m）各框架轨枕与标准Ⅲc型轨枕道床横向阻力数值.研究结果表明：在不同道床断面型式下，各型框架轨枕均能有效增大道床横向阻力，相较于标准Ⅲc型轨枕，A型框架轨枕（轨枕承轨台双翼缘型）可提升道床横向阻力37.8%~50.8%，B型框架轨枕（枕中截面十字型）可提升道床横向阻力25.5%~41.0%，C型框架轨枕（轨枕承轨台下底部加厚型）可提升道床横向阻力13.3%~23.0%.Abstract: To optimize the geometry of the Ⅲc mono-block sleeper and reveal the variation characteristics of the ballast bed lateral resistance before and after optimization, three different frame sleepers were designed and fabricated by adding concrete blocks to specific parts of the Ⅲc mono-block sleeper. Based on the ballast bed lateral resistance test, The frame sleepers and Ⅲc mono-block sleeper were compared for different ballast bed cross-sections (shoulder width 300 mm, shoulder height 0 mm; shoulder width 500 mm, shoulder height 0 mm; shoulder width 500 mm, and shoulder height 150 mm). The study shows that each frame sleeper can effectively increase lateral resistance with different ballast bed cross-sections. Furthermore, compared with the Ⅲc mono-block sleeper, there is 37.8%-50.0% increase in lateral resistance for frame sleeper type A(end-winged sleeper), 25.5%-41.0% increase for frame sleeper type B(middle-winged sleeper), and 13.3%-23.0% increase for frame sleeper type C(bumped sleeper).
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Key words:
- lateral resistance /
- frame sleeper /
- section dimension
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图 4 框架轨枕(从左至右依次为A、B、C型)
Figure 4. Pictures of frame sleepers (A、B、C from left to right)
图 6 标准Ⅲc、A型轨枕横向阻力-位移
Figure 6. Resistance-displacement of Ⅲc sleeper and A frame sleeper
图 7 标准Ⅲc、B型轨枕横向阻力-位移
Figure 7. Resistance-displacement of Ⅲc sleeper and B frame sleeper
图 8 标准Ⅲc、C型轨枕横向阻力-位移
Figure 8. Resistance-displacement of Ⅲc sleeper and C frame sleeper
表 1 试验工况
Table 1. Test condition
mm 工况 轨枕类型 砟肩宽度 砟肩堆高 1 标准Ⅲc型 500 0 2 标准Ⅲc型 500 150 3 标准Ⅲc型 300 0 4 A框架轨枕 500 0 5 A框架轨枕 500 150 6 A框架轨枕 300 0 7 B框架轨枕 500 0 8 B框架轨枕 500 150 9 B框架轨枕 300 0 10 C框架轨枕 500 0 11 C框架轨枕 500 150 12 C框架轨枕 300 0 
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