Quality Control Approach for Joint Grouting of Laxiwa Hydropower Station

As a hidden engineering,the constructing technology of joint grouting is comparatively complicated comparing with other grouting types,it puts forward much more requirement on preparation and procedure control.The paper introduces main dam joint grouting technology and technical process of Laxiwa hydropower station,and proposes several points of quality control during grouting process,thus provides some reference for similar engineering in the future.