CAJ | 학술논문

盾构掘进过程中会在管片环和周围地层之间形成空隙，从而影响到地层稳定性和隧道管片结构安全性。文章结合南京纬三路过江通道工程始发段的地质特性和同步注浆要求，对单液惰性注浆材料进行了试验，研究了不同胶砂比条件下浆液的工作性能和抗压强度指标。试验结果表明：胶砂比大于0.55的砂浆的工作性能均能满足同步注浆要求。综合考虑强度要求及经济性等原因，决定采用D4组配合比的单液惰性注浆浆液。盾构掘进过程中，地表沉降监测值均在设定的报警值范围之内，证明同步注浆达到预期效果。
순구굴진과정중회재관편배화주위지층지간형성공극，종이영향도지층은정성화수도관편결구안전성。문장결합남경위삼로과강통도공정시발단적지질특성화동보주장요구，대단액타성주장재료진행료시험，연구료불동효사비조건하장액적공작성능화항압강도지표。시험결과표명：효사비대우0.55적사장적공작성능균능만족동보주장요구。종합고필강도요구급경제성등원인，결정채용D4조배합비적단액타성주장장액。순구굴진과정중，지표침강감측치균재설정적보경치범위지내，증명동보주장체도예기효과。
During shield tunnelling gaps will emerge between segment rings and surrounding rock, which will af-fect rock stability and structural safety of the segment. In this paper, considering the geological characteristics and synchronous grouting requirements of the Najing Weisan Road river-crossing tunnel, a test was carried out regarding one-component inert grouting material to study the working capacity and compression strength of grouts with different cement/sand ratios. The test results show that the grout working capacity meets the requirements of synchronous grouting if its cement/sand ratio is over 0.55. Considering strength requirements and economical fac-tors, the one-component inert grout with a mix proportion of group D4 was ultimately adopted. The monitored sur-face settlements were not beyond the alarm range during shield tunnelling, which proves that the synchronous grouting achieved the expected results.