渠道衬砌中伸缩缝间距的优化研究

Optimization of Expansion Joint Spacing in Channel Lining

基于极限变形理论,采用文克勒地基模型和弹性体假定,研究并分析了普通混凝土和高性能微膨混凝土(简称HPME混凝土)伸缩缝间距计算的方法和最大伸缩缝间距优化方案。结果表明,高性能微膨胀混凝土的伸缩缝间距比普通混凝土大;PTN新型渠道接缝材料对伸缩缝间距的贡献大于塑料胶泥材料;高性能微膨胀混凝土对伸缩缝间距的增加幅度比普通混凝土高23%以上。因此,渠道衬砌材料和接缝材料可优先选择高性能微膨胀混凝土和PNT新型接缝材料。

Based on the theory of the limit deformation, the Winkler foundation and elastomer assumption were used to study and analyze the calculation method of expansion joint spacing and the maximum spacing optimiza- tion scheme in the ordinary concrete and the high performance micro expansive concrete＇ s （HPME concrete for short）. The results showed that the HPME concrete ＇ s expansion joint spacing was greater than the ordinary con- crete＇ s, and the new joint material PNT made contribution to increasing the expansion joint spacing more than the plastic cement material, and the HPME concrete＇ s expansion joint spacing increased by more than 23% high- er than the ordinary concrete. Therefore, the channel lining material and the joint material should be a better choice by the HPME concrete and the new joint material PNT.