（上海市建筑科学研究院上海市工程结构安全重点实验室， 上海 200032）

［摘要］针对钢筋套筒灌浆连接试件，在出浆孔附近的套筒内部设置不同大小的灌浆缺陷，首先通过预埋钢丝拉拔法对灌浆缺陷进行检测，然后对存在灌浆缺陷的套筒在出浆孔管道进行扩孔注射补灌，最后对补灌后的试件进行单向拉伸试验。试验研究表明：在套筒出浆孔管道扩孔后，采用注射器外接透明软管进行注射补灌，当扩孔孔道内径与透明软管外径之差不小于4mm时，能够保证灌浆饱满密实；补灌后试件的强度满足标准要求，表明扩孔注射补灌具有可行性。本试验采用冲击钻配实心螺旋式钻头在套筒出浆孔管道成孔，现场检测表明后续可采用手电钻配空心圆柱形钻头成孔。

［关键词］预埋钢丝拉拔法； 出浆孔管道； 扩孔； 注射补灌； 单向拉伸试验

中图分类号：TU758-14文献标识码：A文章编号：1002-848X(2019)24-0088-05

Experimental study on supplementary grouting technology based on sleeve grouting plumpness testing results by embedded steel wire drawing method

Gao Rundong, Li Xiangmin, Wang Zhuolin, Zhang Fuwen, Wang Mingqian, Xu Qingfeng

(Shanghai Key Laboratory of Engineering Structure Safety, Shanghai Research Institute of Building Sciences, Shanghai  200032, China)

Abstract:For the steel sleeve grouting connection  specimens, different sizes of grouting defects were set in the sleeve near the grouting hole. Firstly, the embedded steel wire drawing method was used to detect the grouting defects, and injecting for supplementary grouting was conducted on the   sleeve outlet pipe  with grouting defects, and finally the one-way tensile test was carried out on the specimens after the injecting for supplementary grouting. The experimental results show that after expanding the hole of the sleeve outlet pipe, the syringe external transparent hose was used for injecting for supplementary grouting, and the grouting can be full and dense when the difference between the inner diameter of the expanded hole and the outer diameter of the transparent hose is not less than 4mm; after injecting for supplementary grouting, the strength of the test specimens meets the standard requirements, which shows that it is feasible for the injecting for supplementary grouting of the expanded hole. In this experiment, the percussion drill with solid screw bit was used to form holes in the pipe with slurry holes. The field test shows that the electric hand drill with hollow cylindrical bit can be used to form holes later.

Keywords:embedded steel wire drawing method;  sleeve outlet pipe; expanding hole; injecting for supplementary grouting; one-way tensile test

*上海市科委社发领域课题（15DZ1203506，16DZ1201805，18DZ1205705）,上海市建设工程检测行业协会课题（2018-04)。

通讯作者：李向民，博士，教授级高级工程师，Email:13601902634@163.com。