全液压旋挖扩底钻孔灌注桩质量管控措施研究  

Quality Control Measures of Full Hydraulic Rotary Excavation and Bottom-expanded Cast-in-place Pile

作　　者：刘其霞 LIU Qi-xia(Shanghai Hongbo Engineering Consulting Management Co.,Ltd.)

机构地区：[1]上海宏波工程咨询管理有限公司

出　　处：《中国标准化》2024年第6期213-218,共6页China Standardization

摘　　要：扩底灌注桩是一种混凝土灌注桩,是在进行原有灌注桩施工的基础上对桩底进行扩底处理,从而增加灌注桩的承载力和稳定性。在工程地质条件差特别是软土地基,施工难度大,施工中易产生如塌孔等质量问题,为了避免在采用全液压旋挖扩底钻孔灌注桩施工时,因现场技术质量管理措施不到位而出现桩身质量差、进度滞后等问题,本文针对其质量管控措施进行研究,采取扩底灌注桩施工工艺、制定“四令”精细化过程管理原则、计算注浆施工所需水泥浆量等方法,优化了工程施工流程,严格各施工环节质量管理,确保全液压旋挖扩底钻孔灌注桩施工安全、质量提升。Bottom-expanded cast-in-place pile is a kind of concrete cast-in-place pile,which is to expand the bottom of the pile on the basis of the original cast-in-place pile construction,so as to increase the bearing capacity and stability of the cast-in-place pile.In poor engineering geological conditions,especially in soft soil foundation,the construction is difficult,and the quality problems such as hole collapse are easy to occur in the construction.In order to avoid the problems such as the poor quality of pile body and the lagging progress due to the on-site technical quality management measures are not in place when the full hydraulic rotary excavation and bottom-expanded cast-in-place pile is used in the construction.In this paper,the quality control measures are studied,such as the construction technology of bottom-expanded cast-in-place pile,the formulation of the“four orders”fine process management principle,and the calculation of the amount of cement slurry required for grouting construction.The project construction process is optimized,and the quality management of each construction link is made strict,to ensure the construction safety and quality improvement of full hydraulic rotary excavation and bottom-expanded cast-in-place pile.

关 键 词：扩底灌注桩 施工工艺 “四令”精细化管理 计算注浆量 

分 类 号：TU753.3[建筑科学—建筑技术科学] TU712.3