【摘要】 通过研究箱梁底板沿预应力束出现的纵向裂缝,分析预应力束附近的横向次拉应力,同时考虑施工中可能产生的偏差情况,对圆形波纹管保护层厚度提出相应的计算公式,对于施工有着重要的实践意义。更多还原

【Abstract】 By studying on longitudinal crack along the pre-stressed wire at the bottom plate of box beam,it is important for construction to analyze the status of transverse secondary tension stress next to pre-stressed wire and possible construction deviation,with proposing the corresponding formula which calculates the thickness of protecting course of circle corrugated pipe.更多还原