...基坑围护结构计算-本科生毕业论文 关键词：砂卵石地层；深基坑；围护结构；设计计算 [gap=331]Key words：Sandy cobble stratum; Deep foundation pit; Enclosure structure; Design calculation ...
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Secondly, EPB shield cutter wear with ultrasonic supervisory gear for abrasion was researched in sandy cobble stratum. The design of test is rational and the result of test is true.
针对砂卵石地层条件下盾构刀具磨损问题进行研究,特别是配备有超声波磨损探测装置刀盘的盾构(属原型试验、国内首次运用)展开研究,试验设计合理,试验结果真实、可靠。
参考来源 - 土压平衡盾构掘进刀具动态磨损研究Leak of pulp, low efficiency and fall down of hole wall are the common problems when we drill in thick loose sand-pebble layer.
松厚的砂卵石地层中钻进时，除钻效低外，冲洗液的漏失和孔壁不稳定是钻进中所面临的最大障碍。
参考来源 - 特殊地层中大口径钻孔灌注桩施工技术的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
注入泥浆和泡沫的混合液对砂卵石地层进行塑流化改善效果良好。
Injecting the mixing liquid of mud and foam achieves good effects for plastic flow property conditioning of gravel with sand.
北京地下直径线是北京地区首次在砂卵石地层中采用大直径泥水盾构。
The large-diameter slurry shield is the first time to be used in sandy cobble stratum in Beijing Underground Zhijing Line in Beijing area.
在砂卵石地层中勘察钻探时，要解决三个关键性的问题：一是钻进进尺问题；
There have three decisive questions need to solve while drilling in sand gravel layer. The first question is drilling footage.
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