Research conclusions：This paper proposes the double lining design method of outer lining bearing filling load and inner lining reinforcing structure and bearing later load．By means of finite element structure analysis，the key process is determined which inner lining must be exceed after the completion of outer liner and I—period filling，these design measures can ensure the stress safety and structure stability of open cut tunnel，concrete dam and foundation，and the whole and part stability of filling engineering．The method of shear pile on the bottom of open cut tunnel will prevent filling from pushing tunnel is proposed．Filling construction technology is key to ensuring the stability of open cut tunnel and dam，and the construction of concrete dam should control casting temperature and decline heat of hydration． Research achievements have important reference value and significance on the open excavation construction of railway， highway，subway tunnels，especially involving the open cut structure of thick filling，heavy load and deep foundation．