二重管高压旋喷洗孔、注浆法在砼灌注桩缺陷处理中的应用  

Research on the Application of Double Pipe High Pressure Rotary Spray Hole Washing and Grouting Method in Defect Treatment of Concrete Grouting Pile

作　　者：曾庆友 ZENG Qingyou(Fujian Construction Engineering Group Co.,Ltd.Fuzhou 350001)

机构地区：[1]福建建工集团有限责任公司,福建福州350001

出　　处：《福建建筑》2020年第12期104-109,共6页Fujian Architecture & Construction

摘　　要：砼灌注桩在施工过程中因质量控制存在沉渣过厚、砼离析或桩端未进入持力层等缺陷,应用二重管高压旋喷洗孔、注浆技术处理,很好地解决了砼灌注桩的缺陷问题并取得较好效果。基此,探究其高压洗桩、注浆机理及其工艺特点,并分析其桩基检测,探讨其加固处理及效果。实践成果证明了该方案安全可靠,可有效提高桩基承载力。The cast-in-place concrete pile which exist the defects such as the sediment is too thick,concrete segregation or the piles was not entered into the bearing layer.The application of double pipe high pressure rotary grouting hole washing and grouting technology which can be effectively solve the defects and achieve the better results.Based on this,this article explores its high-pressure pile washing,grouting mechanism and its technological characteristics and analyzes its pile foundation detection,discusses its reinforcement treatment and effect.The practical results have proved that the scheme is safe and reliable which can effectively improve the bearing capacity of the pile foundation.

关 键 词：灌注桩 高压旋喷 高压注浆 低应变法 高应变法 

分 类 号：TU7[建筑科学—建筑技术科学]