卡拉贝利水利枢纽工程联合进水口软岩高边坡稳定设计

发布时间：2018-08-26 19:59

【摘要】：卡拉贝利水利枢纽工程联合进水口高边坡最大高度为113 m,边坡岩体易风化、遇水软化,岩石饱和抗压强度仅0.8 MPa。在经常遭遇高烈度地震、常年受水体淹没浸泡且每年都经历水位大幅升降的情况下保证百米级软岩边坡稳定,是设计中的难题。考虑左侧边坡开口线附近是阶地,边坡设计采取以开挖为主的"强开挖、弱支护"设计原则,即用缓于岩石水下稳定边坡坡比开挖,确保边坡在地震、岩石饱和状态及水位降落工况下均不会整体失稳。针对岩石易风化软化特点,要求开挖后立即素喷混凝土保护岩石,减少岩石暴露时间,随后挂网喷锚支护控制边坡局部掉块和表层滑动,运行时控制水库水位消落,以保障边坡安全。研究结果为其他强震区临水软岩高边坡设计提供了参考。
[Abstract]:The maximum height of the high slope at the joint inlet of Karabel Water Control Project is 113m.The rock mass of the slope is weathered easily and softened in water. The saturated compressive strength of the rock is only 0.8 MPa.. It is a difficult problem to ensure the stability of 100 meters soft rock slope under the condition of frequent high intensity earthquake, being submerged and immersed in water body all year long, and experiencing a large rise and fall of water level every year. Considering that there is a terrace near the opening line of the left side slope, the design principle of "strong excavation, weak support" is adopted in slope design, that is, the slope is excavated slowly than the slope ratio of rock underwater stability, so as to ensure the slope in earthquake. There is no overall instability in the saturated state of rock and the falling condition of water level. Aiming at the characteristics of easy weathering and softening of rock, it is required to protect rock with plain shotcrete immediately after excavation, to reduce the exposure time of rock, then to control the local falling and surface sliding of slope by hanging mesh shotcreting anchor support, and to control the water level of reservoir to fall while running. To ensure the safety of the slope. The results provide a reference for the design of high slope near water soft rock in other strong earthquake areas.
【作者单位】：新疆水利水电勘测设计研究院;中国水利水电科学研究院流域水循环模拟与调控国家重点实验室;
【分类号】：TV223

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