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1)  the method to lowering ground water level in well-point
井点降水法
2)  dewatering [英][di:'wɔ:tə]  [美][di'wɔtɚ]
井点降水
1.
Light dewatering used in the foundation of the bridge construction;
轻型井点降水在桥梁基坑开挖中的应用
2.
Analysis of dewatering in de ep foundation pit engineering;
深基坑工程承压含水层井点降水分析
3.
Combined with the light dewatering system adopted in the foundation excavation of one building,key points of design,materials and general step of construction are introduced for the light dewatering system.
结合某建筑大楼基坑开挖所采用的轻型井点降水方法,阐述了轻型井点降水系统的设计计算要点、所需设备材料及施工的一般步骤。
3)  well-point precipitation
井点降水
1.
Research on the design and construction of the program of well-point precipitation;
井点降水方案设计与施工研究
2.
On design of light well-point precipitation and its construction;
轻型井点降水设计与施工
3.
This paper, with the concrete engineering,expounded the practical application of the method of calculation of well-point precipitation.
本文结合具体工程,阐述了井点降水计算方法的实际应用。
4)  well-point dewatering
井点降水
1.
The application of well-point dewatering in deep excavation work and construction example;
井点降水在基坑施工中的应用及工程实例
2.
Analysis of irregularly arranged well-point dewatering and settlement;
非规则排列的井点降水与沉降计算分析
3.
On calculation of hydrologic parameter in well-point dewatering
井点降水水文参数的计算
5)  well point dewatering
井点降水
1.
Application research of well point dewatering on civil defense project
井点降水在人防工程中的应用研究
2.
Because of complicated geological conditions and neighboring environment in the site of foundation pit of Wuhan Zhenghewangfu Garden,combined supporting method was adopted with pile anchor retaining,shaft sealing with dry jet mixed pile and well point dewatering,so safety was ensured for construction of deep foundation pit,surrounding buildings and underground utilities.
针对武汉政和王府花园深基坑极为复杂的地质条件和周边环境,采用桩锚支护、粉喷桩桩侧止水、井点降水的联合支护方案施工,保证了基坑施工和周边建筑物及地下管线的安全,降低了工程成本,缩短了工期,取得了很好的经济效益和社会效益。
3.
According to site lithologic association,hydrogeologic condition,excavation shape,depth and excavating scheme,three layered annular Abyssinian well point dewatering is mainly used,and assis.
根据场地的岩性组合、水文地质条件、基坑形状、深度和开挖方案等特点,采取了三层环形管井井点降水为主和轻型井点降水为辅的降水方案,克服了工程时间紧、工程量大、提供勘察资料差、水文地质条件复杂等问题,完成了降水、开挖、管道连接和场地恢复工作,为类似项目提供了借鉴。
6)  well point precipitation
井点降水
1.
Application of light well point precipitation in foundation pit engineering;
轻型井点降水在基坑工程中的运用
2.
At the same time,the method of light well point precipitation is also used to decrease the groundwater level,which can ensure the slope stability of foundation.
同时,采用轻型井点降水能够有效降低基坑地下水位,确保基坑边坡稳定。
3.
By the introduction of Matoushan Tunnel of Ganlong Railway, the paper introduces the combination of parallel pilot hole and well point precipitation, explains the reason, and presents the treatment measures.
通过对赣龙铁路马头山隧道工程的介绍,分析了平行导坑与井点降水在隧道中的结合情况,并对其处理过程作阐述。
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)
  
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