This paper presents sand and cobble foundation treatment of overflow dam, guide wall and overflow weir by "high pressure jet grouting" at an in Hydropower Station.
本文主要介绍应用“高喷”技术对安居水电站溢流坝、堰坝导墙、溢流堰天窗沙卵石基础处理的方法和体会。
The bearing characteristic of large diameter and super-long pile in quaternary soil layer is analyzed in the case of no good bearing layer (such as rock, sand and cobble layer) and no ripe experience.
在没有良好的持力层（基岩或砂、卵石层）和成熟经验可借鉴的情况下，对第四系土层大直径超长桩（钻孔灌注桩）的承载特性进行了分析。
At last. the failure pattern of sand-cobble deep excavation in Chengdu is researched, and then, the suitable retaining structure is given.
最后研究了成都地区砂卵石深基坑的破坏模式，以及最适宜成都地区砂卵石深基坑的支护形式。
C. Vibration strike: it is used in drilling and casing with loosen sand, cobble stone and gravel layer etc.
振动击打：用于松散的砂、卵石、碎石地层的钻进及下套管等。
C. Vibration strike: it is used in drilling and casing with loosen sand, cobble stone and gravel layer etc.
振动击打：用于松散的砂、卵石、碎石地层的钻进及下套管等。
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