1) pipe well for lower water
管井降水井
1.
The technique of pipe well for lower (obstruct) water is to set pipe well for lower water around deep foundation pit and draw water by phreatic water pump,thus can depress water pressure of underwater and lower water level,avoid great gush water in the process of construction of deep foundation pit and emerged harm of quicksand,and ensure the construction finish successfully.
管井降(截)水技术是通过在深基坑周围设置管井降水井,利用潜水泵抽排地下水,使地下承压力水减压后再降低地下水位,避免深基坑施工过程中大量涌水,并产生流砂危害,确保深基坑顺利施工。
2) tube well dewatering
管井降水
1.
The application of tube well dewatering in treatment of weak permeable stratum in deep excavation work;
管井降水在深基坑弱透水地层中的应用
2.
Analysis of tube well dewatering construction in underpass;
地下过街通道管井降水施工实例分析
3.
Application of water-seal curtain and tube well dewatering in support of deep foundation pit
止水帷幕和管井降水在深基坑支护中的应用
3) pipe well dewatering
管井降水
1.
Through introduction of the characteristics of light well point dewatering technique and pipe well dewatering technique in foundation pit dewatering and comparison of engineering cost the latter technique is selected used as dewatering method is this work.
通过介绍基坑降水当中关于轻型井点降水与管井降水的技术、经济差异,选定了管井降水作为降水方案,并介绍了降水过程中重点实施的内容,以保证基坑工程的顺利进行。
4) well pipe and well point drawdown
管井井点降水
1.
Designing and construction of well pipe and well point drawdown;
管井井点降水的设计与施工
5) Tube well draining
管井井点降排水
6) dewatering by rung tube well
梯级管井降水
1.
This paper has expatiated upon the plan of "dewatering by rung tube well", which not only achieve safely and successfully the construction opration in abundant water and deep foundation pit by digging holes artificially, but also tackle the key difficulty of dewatering in deep foundation pit in the construction.
阐述利用“梯级管井降水”方案 ,成功安全实现在厚度大砂卵石砾石强富水的深基坑及人工挖孔护坡桩干槽施工作业 ,解决了工程中基坑降水是关键的难
补充资料：井点降水法
井点降水法
lowering the water table by well point
Ji叩d仰J心戊笋浏fo井点降水法(lowering the water table by we-n一point)预先将井筒穿过的含水层通过用钻孔进行疏干，然后掘进井筒的施工技术。在不稳定的含水岩层中开凿井筒时，在预定的井筒周围凿出钻孔，利用钻孔抽水或往下放水，使地下水位降落，疏干含水层。然后，在疏干区内进行井筒掘砌作业。井点降低地下水位的方法有抽水法和放水法.前者利用深井泵或潜水泵从井筒周围钻孔中抽水，使水位降低，形成疏干区。(见图)后者在井筒断面内凿出钻孔(滤水孔)，使地下水经滤水孔流人下部已开凿的巷道内，再转排至地面。抓 井点降水示意图 1一井筒;2一抽水孔.3一地下原有静水位， 4一深井泵.5一抽水时静水位 钻孔抽水法是在比井筒掘进直径大4m的布孔圈径上钻3~6个直径为100~500mm的钻孔，其深度以进人不透水层中2~4m为宜。随着钻凿孔的进行在钻孔中安设好保孔管，保孔管上钻有直径为5~15mm的小孔，包扎好金属过滤网，以防止砂粒进人撼管内磨损水泵或使孔壁坍塌.钻孔抽水时，孔内的水位急剧降低，形成水位最低点.外部围岩中的水，因存在水位差而流向孔内，水位降低较大，而远离钻孔的水流阻力则增大，因此水位降低较小，从而形成降水漏斗，满足了疏干要求。 矿井降水孔的涌水量多为30~loom，/h，主要含水层的水位降低值可达几十米。当含水岩层渗透系数大于3m/d时，井点降水法较为有效。井点降水法通常不能使水位降低到含水层的最低深度处，在隔水层上部有一段井筒的水没有被疏干称为残余水柱。必要时需要采取其他措施(如板桩法)来保证该段井筒的掘砌施工。 井点降低水位可使土体密实，引起结构上的土压力增高和地面下沉，应注意防止不均匀沉降。当含水砂层厚度不大、粘土夹层不超过两层，有良好渗透性时，宜采用钻孔抽水法。 (张著超)
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