大源渡二线船闸防渗体系施工质量控制

大源渡二线船闸是紧邻布置于已建枢纽的结构物,地质条件复杂,土层中含强透水层,可能存在坝基和坝肩渗漏等问题,设计施工技术难度大。对其防渗体系设计思路及施工质量控制进行探讨,提出防渗体系应从平面封闭和断面封闭2个角度进行分析,并针对高喷防渗与帷幕灌浆防渗搭接的处理给出可行的措施。施工完成后压水试验和钻芯取样检测结果均显示达到规范要求,其采用的高喷防渗及帷幕灌浆相结合的防渗措施及检验方法对类似工程有借鉴意义。

Construction quality control of anti-seepage system for Dayuandu second-line lock

Dayuandu second-line ship lock is adjacent to the structure of the existed junction.Since the geologic condition is complicated and there is a stronger aquifer in the soil layer,problems such as leakage of the dam foundation and abutment possibly occurs,thus the design and construction are difficult technically.Probing into the design idea and construction quality control of the anti-seepage system,we propose to analyze the anti-seepage system from the two angles including plane sealing and section sealing,and take feasible measures on the lap part of high-pressure spraying and curtain grouting.After completion of the construction,both the water pressure test and core sampling test prove to meet the specifications.The anti-seepage measures and inspection methods of high-pressure spraying and curtain grouting used in this project may serve as reference for similar projects.