Antirust DI Jacking Tube High Water Table And Difficult Soil Condition

Antirust DI Jacking Tube High Water Table And Difficult Soil Condition

The followings need to be considered when jacking is adopted.

1 High water table and difficult soil condition may require special work.

2 Jacked pipe may subside in soft ground.

3 Handling unexpected subsurface obstacles may face difficulties while jacking.

4 Experienced operators and well organized construction work are necessary.

5 Location of shafts is important. Drive shaft may affect surrounding grounds.

Classification of Pipe Jacking

Classification can be made by several aspects such as methods of excavation, tunnelface support, jacking force transmission, spoil removal and so on. The nominal diameter of jacking pipe is also used for classification of pipe installation. In Japan, the diameters from 800 to 3000mm are defined as medium to large. The diameters correspond to man-entry size. The diameters from 150 to 700mm are defined as small. An example of classification is shown.