Study On Seepage Characteristics And Design Methods Of Seepage Control In Underground Engineering

The author has particularly researched into the prominent problems of finite element analysis of seepage field in underground powerhouse and anti-seepage and draining system design in water conservancy engineering by summarizing the former achievements. The following is included:(1) It is key is to confirm the free surface of seepage fields for the question of underground powerhouse seepage, The author has researched roundly into the actual methods of the free surface question of underground powerhouse. And we solve the free surface problem of underground planthouse by using advanced method of nodal virtual flow rate of an unvaried finite mesh. Based on the saturated-unsaturated seepage theory, the mathematic model under the condition of rain infiltration has been deduced. The problem of mathematic model is primarily solved and the rain infiltration boundaries have been successfully handled.(2) The treat of drainage wells and drainage curtains is a key point of seepage control research. Drainage holes (curtains) must be simulated exactly because there are a large amount of drainage wells (curtains) that are of great effect, which requires high technique demands for mesh partition and capacity of computer. The question is extremely complicated. On based of original drainage substructure brought forward by ZHANG Youtian. The author has solved its shortage by adopting the technique of improved drainage substructure which is very rigorous in theory putted forward by ZHU Yueming. Simulating actual whole 3-D seepage action and effect of seepage control have come true.(3) Seepage model for 3-D fractured rock masses is introduced to seepage problem of underground powerhouse. The research is more intact than before, which serve better construction in practice.