1) large diameter well
大口径井
1.
Taking the geological condition in the harbour district Jingtang Port as the model,the detail analysis on lowering water level by large diameter well point are given in the paper.
以京唐港地区地质条件为模型,对大口径井点降水进行了详细的分析,对大口径井点降水在实际工程应用具有理论参考价值。
2) large diameter tube well
大口径管井
1.
In order to select reasonably the technical patterns of intake works along riverside,the practical experiences with three kinds of intake structures (that is large diameter tube well,radial well and infiltration ditch),which have been used in Henan Oilfield for the past 20 years,were summarized.
为合理选择沿河取水的技术模式,对河南油田近20年来通过大口径管井、辐射井和渗渠取水的3种实践进行了经验总结。
3) large-diameter well
大口径水井
4) deep big-diameter well
大口径深井
1.
The paper introduces foundation treatment process of three obsolete deep big-diameter wells under reinforced cocnrete strip footing in terms of geological condition analysis, treatment scheme and the treatment effect, which can be consulted by similar foundation treatment projects.
文章介绍某小区13#11F住宅楼条基下三口大口径深井的工程分析、地基处理方案和处理效果,可供类似地基处理工程参考。
5) the artificial large-diameter well
人挖大口径井
6) large diameter well point dewatering
大口径井点降水
1.
Taking one foundation excavation work as example in this paper according to large diameter well point dewatering and side slope support with concrete drill holing stake practical design process is introduced as well as the matters needing attention in construction.
结合内蒙古某酒店及会议中心大楼基坑开挖工程实例 ,对其所采用的大口径井点降水和钻孔灌注桩边坡支护方案的设计过程作了介绍 ,提出了施工中的一些注意事项。
补充资料：口径
口径有线膛枪与滑膛枪之分
线膛枪：线膛枪枪管内有膛线，凸起的为阳线，凹下的为阴线。其口径指两条相对的阳线之间的垂直距离。注意：弹头直径均大于口径，这样弹头才能嵌入膛线旋转并起到闭气的作用。如中国5.8mm口径步枪，弹头直径为6mm。
口径一般用毫米或英寸来表示，如7.62mm、0.45英寸。在英文中，常常省略0及英寸，写作.45口径或干脆写作45口径，读作点四五或四五口径。有些编辑不懂此表示方法，直接在45、38后加上mm，生生造出38mm之粗的手枪，贻笑大方。
一英寸＝25.4mm
0.30in=7.62mm 0.357in=9mm 0.38in=9.65mm 0.45in=11.43mm 0.50in=12.7mm
0.223in＝5.56mm（实际＝5.66mm）
滑膛枪：滑膛枪以号数来表示。以一磅纯铅（453.5g）制作出偶数个相等的球体，正好能让一个小球通过枪膛的滑膛枪，即以小球的个数命名。如12号滑膛枪是以一磅纯铅制作出12个小球，并恰好可以通过枪膛。枪口直径为18.5mm
滑膛枪不仅可以发射独弹，还可以发射霰弹，集束箭弹，催泪弹，染色弹，非致命动能弹等多种弹种。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条