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首页> 外文期刊>International Journal on Hydropower & Dams >Design, excavation and performance of the Lauca underground powerhouse in Angola
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Design, excavation and performance of the Lauca underground powerhouse in Angola

机译：安哥拉Lauca地下厂房的设计，开挖和性能

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摘要

The 2000 MW Lauca hydro project is being built on the Kwanza river in Angola and comprises a large underground powerhouse with approximate dimensions of 26 m wide × 60 m high × 300 m long, excavated by drill and blast in a metamorphic rockmass. To meet the demands of the project schedule, the design concept of the hydraulic circuit meant that the cavern had to be placed guite close to the valley slope, to eliminate the need for a surge chamber downstream of the powerhouse. This condition reguired a careful study of the in-situ stress state in the rockmass to allow its implementation. This paper describes the studies developed for the geotechnical design of an underground powerhouse, including numerical stress-strain analyses and hydrojacking tests for the investigation of in-situ stresses, numerical analyses and kinematic studies of excavation for dimensioning of the rock support. The paper also includes the seguence of the excavation, monitoring data and an analysis of the performance of the structure.
机译：2000兆瓦的劳卡水电项目正在安哥拉的宽扎河上建造，包括一个大型地下电站，其大小约为26 m宽×60 m高×300 m长，是在变质岩体中通过钻探和爆破开挖的。为了满足项目进度的要求，液压回路的设计理念意味着必须将洞穴放置在靠近山谷斜坡的地方，以免在动力装置下游安装调压室。这种情况要求仔细研究岩体中的原位应力状态以使其得以实施。本文介绍了为地下厂房的岩土工程设计而开展的研究，包括数值应力-应变分析和用于现场应力调查的水力压实测试，数值分析和用于岩体支护尺寸的开挖运动学研究。该文件还包括开挖序列，监测数据和结构性能分析。

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