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（上海市建筑科學(xué)研究院 上海市工程結(jié)構(gòu)安全重點(diǎn)實(shí)驗(yàn)室， 上海 200032）
［摘要］裝配整體式混凝土結(jié)構(gòu)豎向受力鋼筋大多采用套筒灌漿連接，由于套筒內(nèi)部堵塞、分倉不合理或爆倉等原因，常導(dǎo)致部分套筒灌漿不飽滿，嚴(yán)重影響結(jié)構(gòu)的安全。本文通過16組共48個試件，對在套筒不同位置修復(fù)灌漿缺陷的技術(shù)進(jìn)行了試驗(yàn)研究。研究結(jié)果表明，可直接在套筒出漿孔通過注射器外接透明軟管進(jìn)行注射補(bǔ)灌；或者在套筒灌漿孔和出漿孔連線上灌漿料液面到達(dá)位置的附近鉆孔，將該鉆孔作為灌漿孔進(jìn)行注射補(bǔ)灌。補(bǔ)灌后套筒接頭的單向拉伸性能均能達(dá)到滿灌時現(xiàn)行行業(yè)標(biāo)準(zhǔn)的規(guī)定，為目前大量存在的套筒灌漿缺陷提供了有效的解決手段。
［關(guān)鍵詞］灌漿缺陷； 鉆孔； 注射補(bǔ)灌； 缺陷修復(fù)
中圖分類號：TU758-14文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2019)24-0093-05
Experimental study on repairing grouting defects at different positions of sleeve of monolithic precast concrete structure
Li Xiangmin， Gao Rundong， Xu Qingfeng， Wang Zhuolin， Wang Mingqian， Zhang Fuwen
(Shanghai Key Laboratory of Engineering Structure Safety, Shanghai Research Institute of Building Sciences, Shanghai 200032, China)
Abstract:The vertical reinforcing bars of monolithic precast concrete structure are mostly connected by grouting sleeves. Due to internal blockage of the sleeve, unreasonable warehouse distribution or warehouse burst, the grouting of some sleeves is not full, which seriously affects the safety of the structure. Using 16 groups of 48 specimens, experimental study was conducted on the technique of repairing grouting defects in different positions of the sleeves. The research results show that injecting for supplementary grouting can be directly carried out through the transparent hose outside the syringe at the outlet hole of the sleeve. Or, a hole can be drilled near the line between the sleeve grouting hole and the grout outlet when the liquid level of the grouting material reaches the position, and this hole can be used as the grouting hole for injecting for supplementary grouting. The one-way tensile properties of the sleeve joint after the injecting for supplementary grouting can meet the current industry standards, which provides an effective solution for the defects of the sleeve grouting.
Keywords:grouting defect; drilling hole; injecting for supplementary grouting; defect repair
*上海市科委社發(fā)領(lǐng)域課題（15DZ1203506，16DZ1201805，18DZ1205705）。
作者簡介：李向民，博士，教授級高級工程師，Email: 13601902634@163.com。
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