Dam structure with permanent and temporary combined multifunctional drainage box culvert and construction method thereof

Abstract

The invention relates to a dam structure with a permanent and temporary combined multifunctional drainage box culvert and a construction method thereof and aims at providing the dam structure with thepermanent and temporary combined multifunctional drainage box culvert and the construction method thereof which have the advantages of convenient construction and low cost in order to achieve the construction flow guide function, the foundation pit reverse drainage function, the dam body permanent drainage function and the dam body seepage water collection and measurement function. According to the technical scheme provided by the invention, the dam structure is provided with a concrete face rockfill dam body located on a river channel. A closure cofferdam is arranged on a dam body upstream river channel. The river channel on the upstream of the closure cofferdam communicates with the dam body downstream river channel through an intake canal, a concrete shaft, the drainage box culvert andan outlet canal in sequence. The drainage box culvert is arranged below the dam foundation surface of the dam body and transversely penetrates through the dam body. The dam structure with the permanent and temporary combined multifunctional drainage box culvert and the construction method thereof are suitable for construction flow guide and dam body drainage of a concrete face rockfill dam project of which the flow guide scale is small and little bed-load sediment exists on a river bed, such as, a reservoir on a pumped storage power generation station with the small rainwater collection area.

Description

technical field [0001] The invention relates to a dam structure with permanent combined multifunctional drainage box culvert and a construction method thereof. It is suitable for construction diversion and dam body drainage of concrete face rockfill dam projects with small diversion scale and little moving sediment in the river bed, such as the upper reservoir of pumped storage power station with small rain collection area. Background technique [0002] Concrete face rockfill dam construction diversion generally adopts the scheme of cofferdam plus diversion tunnel, while the rainwater collection area of ​​the upper reservoir of the pumped storage power station is generally small, and the scale of diversion flood is small. Although the diversion of tunnel is reliable, it is expensive Relatively high. [0003] As we all know, due to the relatively low foundation pit of the concrete face rockfill dam, there is generally a reverse seepage problem during the construction period,...

AI Technical Summary

Problems solved by technology

At present, the seepage monitoring of concrete face rockfill dams is basically to set up retaining walls and water measuring weirs at the downstream dam foot to collect and measure seepage water, but this method has the problem that it is greatly affected by external rainfall.

Images