酸雨侵蚀作用下抗滑桩混凝土中性化试验

Anti-sliding Pile Concrete Neutralization Test Research under Acid Rain Erosion and Stress Coupling

抗滑桩在滑坡治理中应用得比较广泛,确保抗滑桩的耐久性至关重要,抗滑桩混凝土中性化程度是影响其耐久性的重要因素。通过酸雨侵蚀与应力耦合作用下的模型试验,探讨了混凝土受酸雨侵蚀后强度和中性化深度的变化情况。分析结果显示:在酸雨侵蚀作用下,抗滑桩混凝土抗压强度先增大,然后逐渐减小;应力作用下,抗滑桩混凝土中性化深度与无应力时有很大区别,弯曲拉应力作用下的混凝土中性化深度大于无应力状态下的中性化深度,弯曲压应力下的中性化深度小于无应力下的中性化深度,应力水平的大小将影响到中性化深度的大小。

Anti-sliding piles are fit constructions which used extensively in landslide prevention. Their durability is very important which influences their lives. The extent of the concrete neutral- ization is an important influencing factor. By a model experiment under acid rain erosion and stress coupling, tested concrete strength and neutralization depth after eroded by acid rain. The results indicate that the concrete strength of anti-slide pile firstly increases and then decreases gradually after acid rain erosion. On stress coupling, concrete neutralization depth of anti-slide pile is very different to that without stress. Concrete neutralization depth under bending tensile stress is larger than without stress, while concrete neutralization depth under bending tensile pressure is smaller than without stress. The stress level has a certain influence on concrete neu- tralization depth.