土坝防渗墙与帷幕灌浆协同施工新技术研究OA

In order to overcome the poor adaptability of the traditional pre-embedded pipe technique in earth dam re-inforcement projects characterized by loose fill soil and high-humidity conditions,taking Naban Reservoir Rein-forcement Project of Guangxi as an example,a collaborative construction method of"eliminating pre-embedded pipes and adopting post-construction precision drilling"was proposed and studied.Firstly,the necessity of elimi-nating pre-embedded pipes under specific geological conditions was demonstrated.Subsequently,the core concept,feasibility,key implementation techniques,and potential impacts of the new method were systematically analyzed.Finally,its significant advantages and engineering value were summarized and demonstrated.The results of engi-neering practice show that this new method effectively resolves the technical limitations of traditional approaches under special geological conditions.For boreholes with a depth of approximate 50 m,the maximum deviation is only 18 cm,markedly outperforming the thickness control requirements for the cutoff wall.This technique not only en-sures the overall seepage control performance of the cutoff wall and curtain grouting system,but also improves con-struction safety and efficiency.