罗田水库溢洪道提标改造设计方案研究
Research on the upgrading and reconstruction design scheme of Luotian Reservoir spillway
溢洪道作为水工建筑物中核心泄流设施，其健康运行对维持坝体稳定及保障下游防洪安全具有关键作用。溢洪道加固改造是水利工程除险加固的重点。以罗田水库溢洪道为研究对象，针对其运行现状及存在问题开展提标改造设计研究。通过分析，明确溢洪道存在基础抗冲刷能力差、消力池不满足消能防冲标准、局部边坡高陡易失稳等问题。据此提出改造总体方案，包括进水渠、尾水渠底板重建与边墙加固、陡坡段控制段、泄槽段及消力池整体重建，以及高陡边坡支护等内容。经水力设计(泄流能力、水面线、消能防冲计算及尾水渠桥涵过流能力复核)和结构设计(边墙稳定与应力、消力池抗浮、边坡整治稳定计算)验证，改造方案满足规范要求，泄流与消能效果良好，结构安全可靠。
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.
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