针对三峡工程永久船闸输水廊道砼层面缝的实际情况，从理论上对化学灌浆布孔方案进行了优化设计，并对传统的灌浆设备和灌浆工艺进行了改进。选用长江科学院CW改性环氧浆材，并采用水平深孔、较高压、长时间、两序多孔并灌工艺及气压自动电子化学灌浆系统对层面缝进行了化学灌浆处理，灌后经压水试验，芯样劈拉强度达到了设计要求。

Based on the practical status of the construction joints for the culverts of the permanent lock of TGP, the design of hole arrangement of chemical grouting was optimized theoretically. The traditional grouting equipment and the grouting technique were improved. By means of adopting CW epoxy grouting agent developed by Yangtze River Scientific Research Institute, and the horizontal deep hole, higher pressure, durable, twin order and multi-holes co-grouting technique, using the pneumatic automatic electronic chemical grouting system, the chemical grouting treatment for cold joints was performed. The hydraulic pressure test result showed that after grouting the splitting tensile strength reached the requirements of design.