Research on the upgrading and reconstruction design scheme of Luotian Reservoir spillway

Abstract

As a core flow-releasing facility in hydraulic structures, the healthy operation of the spillway plays a critical role in maintaining dam stability and ensuring downstream flood control safety. Spillway reinforcement and reconstruction are key focuses of risk elimination and reinforcement in water conservancy projects. The spillway of Luotian Reservoir was taken as the research object to carry out upgrading and reconstruction design research targeting its operational status and existing issues. Through analysis, it is identified that the spillway has problems such as poor scouring resistance of the floor, a stilling basin failing to meet energy dissipation and scour prevention standards, and local high-steep unstable slopes. Accordingly, an overall reconstruction plan is proposed, including the reconstruction of the floor and reinforcement of the side walls in the inlet channel and tailrace channel, the integral reconstruction of the control section of the steep slope, the chute section, and the stilling basin, as well as the support of high-steep slopes. Verified by hydraulic design(discharge capacity, water surface profile, energy dissipation and scour prevention calculations, and rechecking of flow capacity of tailrace bridges and culverts) and structural design(calculations of side wall stability and stress, stilling basin anti-floating, and slope treatment stability), the reconstruction plan meets regulatory requirements, with good discharge and energy dissipation effects and safe and reliable structures.

Keywords

Luotian Reservoir / spillway / upgrading reconstruction / hydraulic calculation / structural design