By choosing the point,spreading net,mark choice,accuracy estimate,and the square to make sure the near-shaft control point,provides the theoretical basis for the engineering measure.

After correcting nearsightedness and farsightedness, the changing curve of near point and far point for eyes is given.

The paper discussed some differences of opinions and arguments in the terms of well point, tube well,electric-osmotic well point, well point system, drainage and dewatering and etc,and some opinions and suggestions for those terms are put forward for a standar.

The method of precipitation by deep well and well point is used in Zhanghu Lake.

The engineering practical proves that the use of light well point is limited when the stratigraphic conditions greatly changes though the pit is excavated more shallowly so as to make the dewatering of the pit not reach the excavation requirement.

Large-diameter deep well drainage is a convenient and effective way of underground water drainage; well analysis and observation are the essentials in the construction of this kind,for which the paper makes introduction and discussion with a project example.

Design of deep well point precipitation in pipe canal digging and its application;

The application of deep well point in dewatering of deep foundation pit;

On application of deep well point dewatering in high-rising buildings