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近年来,我国公路建设迅速发展,桥梁基础形式之一钻孔灌注桩,因其适应性强、成本相对低、施工操作比较简单、需要使用的设备投入不高等优点,得到了广泛地应用。但在其施工过程中,工序较多,隐蔽工程掩工质量较难控制,容易出现一些质量缺陷,特别是断桩现象,如果不能得到有效控制,将会影响灌注桩的承载力,进而影响整个桥梁的稳定和安全。根据多年施工经验,从多方面分析了灌注桩断桩的原因,并总结了断桩的预防措施和处理方法。
In recent years, the rapid development of highway construction in our country, one of the basic form of bored cast-in-place piles, has been widely used due to its adaptability, relatively low cost, relatively simple operation and low equipment investment required. However, during the construction process, there are many work steps and the quality of concealed work is hard to control. Some quality defects are prone to appear, especially the broken pile phenomenon. If not effectively controlled, the bearing capacity of the piles will be affected, Bridge stability and security. Based on many years’ experience, this paper analyzes the reasons of broken piles in many aspects and summarizes the preventive measures and treatment methods of broken piles.