MUDFLOW PROTECTIVE STRUCTURE Russian patent published in 2008 - IPC E02B3/02 E02B8/06 E01F7/04 

FIELD: hydraulic structures, particularly to protect downstream objects in mudflow direction against damage by directing mudflow around the object to be protected.

SUBSTANCE: mudflow protective structure comprises upper mud-holding tank arranged at mudflow outlet over objects, which cross mudflow path and defined by protective dam. The structure also has lower accumulation tank and mudflow conduit to permit mudflow passage from mud-holding tank into accumulation one. Longitudinal ridge-like mudflow partitions are arranged inside mud-holding tank. The partitions converge towards mudflow path outlet. Trenches converging in mudflow direction are created between partitions and are arranged on each side of extreme ones. Mudflow conduit is made as excavation system including vertical ones. Each vertical excavation has mudflow inlet orifice provided with grid-like metal structure and located in converged end of corresponding trench. Underground inclined mudflow guiding excavations include main one communicated with lower end of one vertical excavation and arranged under objects to be protected. The main inclined mudflow guiding excavation is opened in slope over accumulation tank. Each of other underground inclined mudflow guiding excavations, namely side ones, is connected to lower end of corresponding vertical excavation. The underground inclined mudflow guiding excavations and communicated with main mudflow excavation and with underground inspection and control one connected with one mudflow excavation and opened in slope surface. All mudflow excavations have inclinations providing transport velocity of solid material entrained by mudflow. Each excavation has at least one safety recess formed in side wall thereof.

EFFECT: possibility of repeated structure usage, increased reliability and efficiency of object to be protection against mudflow.

7 cl, 3 dwg