输电线路工程中混凝土灌注桩结构裂缝产生及预防

The occuring cause and prevention on the structure crack of concrete perfusion stake in project of transmission power lines

大量的工程和实践理论分析表明,钢筋混凝土灌注桩基本上都是带裂缝工作的,在使用荷载或外界物理及化学因素作用下,裂缝不断产生和发展,引起混凝土碳化、保护层剥落及钢筋锈蚀,使钢筋混凝土的强度和刚度受到削弱,耐久性降低,严重时甚至发生垮塌事故,危害混凝土结构的正常使用,必须加以控制。因此研究商品混凝土裂缝产生的原因及预防措施是非常重要而迫切的。

Under the action of the loads and the factor of physics and chemistry, the crack of the concrete perfusion stake will occur and develop, brings the concrete carbonization, protecting layer desquamation and reinforcing steel bar rusting, makes the intensity and rigidity of concrete weaking, the wear reducing, even causes collapse, so analyzing the crack reason of the concrete perfusion stake, and puting forward the preventive measures is very important and exigent.