2results about "Arch dams" patented technology

This invention provides a device and construction method for the first-phase direct burial construction of inclined gate slots in hydropower station arch dams. The device includes a ladder with several operating platforms and ladders connecting the platforms. The lower end of the ladder is set on a sill, and a pre-embedded support is provided on one side of the ladder. The upper end of the ladder is connected to the pre-embedded support via connectors. A main rail slide installation reference seat, a gate lintel installation reference seat, and a water seal plate installation reference seat are provided on one side of the ladder. During construction, the main rail slide installation reference seat, the gate lintel installation reference seat, and the water seal plate installation reference seat provide installation reference surfaces for the main rail, the gate lintel, and the main rail water seal plate, respectively. This device and method have fewer construction steps, and the installation of the gate slot embedded parts does not occupy the straight-line construction period of the dam concrete pouring, which can greatly accelerate the installation progress. During construction, the entire water sealing section of the gate slot embedded parts is laid out in one go, which can effectively avoid the cumulative error caused by multiple measurements and layouts of the water sealing section.

This invention provides an open-type guide wall pier head, belonging to the field of water conservancy and hydropower engineering technology. The guide wall pier head is designed as a circular arc guide wall pier head, an elliptical guide wall pier head, and a straight guide wall pier head. It also proposes a permissible lateral water level difference Δ in the surface orifice drainage channel. h允 Based on the calculation formulas and combined with the maximum discharge unit width flow rate of the orifice, calculation formulas for the dimensions of various parts of the circular arc guide wall pier, elliptical guide wall pier, and straight guide wall pier were determined, providing effective support for the design of spillway structures in water conservancy and hydropower projects. The determination process does not require hydraulic model testing, offering advantages such as a short design cycle and low cost.