某混凝土双曲拱坝建基面选择研究

拱坝建基面选择主要决定于坝基岩体的承载力和滑动稳定性。本工程基岩裸露,岩体呈整体块状结构,强度高,但坝基范围内岩体岩性不一致,导致基岩强度不同。根据地形地质条件,对拱坝建基面的可利用岩体进行多方案论证研究,同时对坝体应力、坝肩稳定、整体稳定等进行大量分析及模型试验,最终确定合理经济的坝体建基面。

Study on selection of foundation surface for a concrete double-curvature arch dam

The selection of foundation surface for construction of arch dam is mainly determined by the bearing capacity and the anti-sliding stability of the foundation rock. So far as the project mentioned herein is concerned， the bed-rock is uncovered and shows an overall massive structure with higher strength， nevertheless， the lithological characters of the rocks within the area of the dam foundation are not so consistent， which lead to various strengths of the bed rock. In accordance with the topographic and geological condition therein， the rock available for the foundation surface is demonstrated with several schemes， meanwhile， a large amount of analyses and model experiments for the dam stress， abutment stability， overall stability， etc. are made， thus a reasonable and economic foundation surface for the dam construction is finally determined.