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为保证大坝地基安全,深孔帷幕灌浆质量至关重要。假如偏斜度严重发展,不仅对钻进质量、事故发生率、钻进效率等方面产生不良的影响,而且会严重影响具有一定防渗标准的“连续帷幕”的形成,使灌浆质量不能达到要求,以致不得不进行一定量的补充灌浆,从而使帷幕的造价提高。本文主要根据实际经验,总结性地探讨深孔帷幕灌浆孔斜成因及其防治措施,以供借鉴。在深孔帷幕灌浆钻孔施工中,孔斜控制具有重要意义。本文着重探讨孔斜成因及孔斜的预防和处理措施,同时对保证钻孔方向的重要性提出了建议。
In order to ensure the safety of dam foundation, deep-hole curtain grouting quality is very important. If the skewness is seriously developed, it will not only adversely affect the drilling quality, accident rate and drilling efficiency, but also seriously affect the formation of “continuous curtain” with a certain seepage prevention standard so as to prevent the quality of grouting Meet the requirements, so had to carry out a certain amount of supplementary grouting, so that the curtain of the cost increase. Based on practical experience, this paper summarizes the causes and prevention measures of deep hole curtain grouting holes for reference. In deep hole curtain grouting drilling construction, hole inclination control is of great significance. This article focuses on the prevention and treatment of the hole inclination and hole inclination, and puts forward some suggestions on the importance of ensuring the drilling direction.