不容忽视的径向力——记一起因径向力引起的桥梁混凝土开裂事件

"径向力"是预应力混凝土中不可避免的应力,在桥梁设计中,一般设计人员都会加以重视,但因施工因素(如波纹管的偏位)出现的径向力,若超出桥梁容许范围,将会出现桥梁开裂、崩裂等问题,势必会降低桥梁的耐久性。该文对一起因径向力引起桥梁开裂事件的发生原因、解决方法,以及善后工作作了全面描述。

Indispensable Radial Force - Bridge Concrete Crack Caused by Radial Force

The "radial force" is the unavoidable stress in the prestressing concrete.The general designers will all pay attention for it in the bridge design.But the problems of bridge crack and disintegrating will occur because of the radial force by the construction factor(i.e.the deviation of corrugated pipe) if exceeding the allowanced range of bridge,which is bound to reduce the durability of bridge.The article fully describes the cause,solving method and dealing with the aftermath of a bridge crack caused by the radial force.