Application of radial well in aquitarde ofgranite-gneiss weathered zone;

Many hydrologists have carried out lots of researches and theoretical discussions on enlarging well yield of single-well in shallow and thin aquifers along the river by using techniques of radial well with big diameter.

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.

The application of radiation-well in the second water-source of Lanxi Town;

A breakthrough in radiation-well technique in its application to dewatering engineering is introduced in this paper.

For solving the problem of precipitation at Bangjiang Street Station of Shenyang Subway,there are four radiation-wells crossing Shenhai overpass section around Bangjiang Street Station by using the method of radiation-well precipitation.

Application of water seepage drainage by radiation well in dropping dam saturation line;

Because common water level lowering methods and caulking methods could not be adopted to control underground water level in construction of deep foundations and underground projects,some engineers used the radiation well water level lowering technology to realize the aim.

The radialized well dewater methods not only resolve the problems and get good results , but also developed a new way to dewater the underground project.

Exploration and practice of radial collector well technique applied in Ningxia;

The design methods of shallow groundwater development using radial collector well technique, such as the structure of silo, designs of well depth, horizontal radial collector, and calculation of discharge etc.