tube well

Mechanism analysis of the declining water production on the tube well and Study on the treatment measures

管井出水量减少机理分析和处理措施探讨

The reducing in water production of tube well is a familiar problem , especially in the loose bed of the quaternary system .

管井出水量减少是常见的问题，特别是第四系松散层中的管井更为普遍。

Analysis and Application of the Restoration of the Tube Well

管井修复方法的分析与应用

The Filter Screen Plug Typed Reinforced Concrete Screen of Tube Well

管井的滤网塞式钢筋混凝土过滤器

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

Underground water level descend with tube well method Discussion on fall of level at the down reach of dams

管井法降低地下水位枢纽下游水位降落问题探讨

The results showed that the concrete have a good workability and strength , and filled the steel tube well .

结果表明，混凝土施工性能良好、强度满足设计要求，钢管内混凝土填充密实。

Appropriate quantity of heat exchange of unit length tube well should be chose according to edaphic characteristics .

因此应根据土壤特性，选择合适的单位长度管井换热量。

The application of adopting unsanded concrete tube well precipitation in the deep foundation of Mei-Yuan building

梅园大厦深坑基础采用无砂混凝土管井降水的应用

Food safety supervision under multi-agent , if lack of coordination , it will lead to inefficient regulation and no one could tube well .

多主体下的食品安全监管，如果各主体协调不当，容易造成监管效率低下，谁都管不好的现象。

The large diameter tube well is an effective way for supplying domestic water with good water quality , large water volume , and cyclical recharge .

大口径管井取水水质好，水量大，能得到周期性补给，是解决生活用水的有效途径。

The effect of deep tube well use on the incidence of childhood diarrhoea was assessed using a random effects negative binomial regression model .

采用随机影响负二项回归模型，评估深管井的使用对儿童发生腹泻的影响。

The results indicates near the wall of tube well the radial temperature grad is great and far from the wall the grad is little .

结果表明：靠近管井壁面的区域径向温度梯度大，远离管井壁面的区域土壤温度变化不明显。

At present , in the urban infrusture engineering , deep and big pit precipitation can be effectively solved with the method of tube well precipitation .

在城市基础工程建设中，利用管井降水法，可以较有效地解决深大基坑降水问题；

Based on engineering experiences for many years , this paper analyzes and evaluates the method of tube well precipitation through actual examples and deals with its basic characteristics and scope of uses .

结合多年的建设实践，通过实例对管井降水法进行了分析论证，介绍了管井降水的基本特点及其使用范围。

The determination of diameter and length of tube well filter is always a problem not being completely solved for a long time in tube well engineering from theoretical and practical point of view .

长期以来，管井过滤器直径和长度确定一直是管井工程未完全解决的理论和实践课题，迄今，有关规定不同，存在学术见解分歧，也存在诸多值得讨论的问题。

The Helmholtz coil is imposed by incentives of different intensity and different frequencies , so that there will generate corresponding magnetic field in the tube well of the Helmholtz coil .

本激励源通过对负载亥姆赫兹线圈施加不同强度、不同频率的激励，使亥姆赫兹线圈在其筒井内产生与设置参数对应的均匀的动磁场环境。

Methods An inclined tube well collecting percolating ground water with powerful pump in the water-bearing stratum in the depth of30 meters below the riverbed of Huanghe River was built .

方法打斜管井深入黄河河床以下30m处，以大功率水泵抽水，经加氯消毒后供生活饮用。

Engineers adopt some effective supporting measures to strengthening foundation pit in a underground garage , such as tube well dewatering , anchored sheet pile wall method , and soil nail wall combined with prestressed anchor , etc.

介绍了某地下停车库工程采用管井降水方案和桩锚支护，土钉墙与预应力锚索相结合的支护方案，取得了较好效果。

Break Analysis of The Centre Tube of Well Drill

立井钻机中心管的断裂分析

It features a titanium spring tube as well as Dual Flow compression and rebound .

它采用钛弹簧管以及双流量压缩和反弹。

Especially the air condition coating copper tube is well received in Southeast Asia , Middle East and Europe League etc.

尤其是空调被覆铜管远销东南亚、中东、欧盟等地，深受顾客欢迎。

The proposed methods of theory analysis and simulation are helpful to the thermal design of microwave tube as well as other powerful microwave tube and electronic components .

本论文所用的理论分析方法和数值模拟手段也可以推广应用到其它微波器件或电子器件。

Amplitude and phase of pressure fluctuation at the inlet of draft tube as well as the inner flow in draft tube are analyzed in detail .

详细分析了尾水管进口截面的压力脉动的幅值和相位，并对尾水管内的流动做了分析。

The comparison between the calculation results and experimental data indicates that the calculation in this paper can medict the pressure fluctuation in draft tube very well .

通过与模型试验结果进行比较可以看出，本计算能够比较准确地预测尾水管内的压力脉动。

This chapter focus on the measurement and result of the temperature profiles along the centerline of the flow tube as well as the optimization of the time-of-flight mass spectrometer .

其中重点介绍了流动管反应器内部温度变化曲线的测量和结果，以及对飞行时间质谱的改造和优化结果。

From this solution , velocity profiles , pressure and wall shearing stresses along the tube as well as the critical Reynolds number required for the separation of the flow are determined .

从此解，决定了速度剖面、压力和沿管壁的剪应力，也决定了流动分离的临界Reynolds数。

In this paper , the reachability problems of target set and target tube as well as the estimation problems of the states of uncertain systems have been discussed by the application of the set theory .

本文从集合论的观点讨论了不确定性系统的目标集和目标管的能达性问题，以及状态估计问题；

The 3 key elements as responsible for the burring quality are analyzed , including the technical level of the burring equipment , the welding quality of the tube as well as the operator competence .

从内毛刺清除装置的装备水平，高频直缝焊管的成型焊接质量，操作人员的技术水平等3个方面入手，分析了影响内毛刺清除质量的因素。

Decrease of diameter of the dipleg and existence of a hopper could increase mass flux out of the exit tube as well as decrease the reversed flow distinctly , thus the average gas residence time was decreased significantly .

料腿直径的减小以及灰斗的存在均可增大由升气管排出的气量并使升气管、料腿回流区大幅减小，进而减小粗旋风分离器内气体总平均停留时间。