dilatation joint meaning in English

钢轨间隙
膨胀缝
膨胀伸缩缝
伸缩缝

For the walls poured by ordinary concrete , the emm and ttm obtain the same qualitative conclusion , despite of some discrepancies in the specific value . but for the walls poured by the scc , the restraining stress calculated by the emm is remarkably smaller than that by the ttm . in other words , the emm results shows that the shrinkage compensation technology can take place the measures of setting dilatation joints , while the ttm results indicates that , though the restraining stress is decreased , the decreased amplitude is inadequate
对计算结果的比较和分析表明，对普通混凝土墙，结果的具体数值有差异，但反映的定性规律相同；对补偿收缩混凝土墙，结果差异巨大，等效模量法认为补偿收缩技术可实现无缝设计，而时程方法在承认补偿收缩技术可减小约束应力的同时，认为应力减幅还不足以实现无缝设计。