As a pipe jacking trenchless underground pipeline construction method, without land, without affecting the pavement structure, and it is also convenient to cross roads, railways, buildings, rivers and so on laying underground pipelines. It has little influence on the traffic and environment, the excavation is less, and the mechanization degree can be adapted to the special conditions. It is considered as a kind of modern underground pipe laying method.

Advantages:

1.Superior characteristic

1.1Light weight, high strength

1.2Convenient installation, jacking force of Jack is lower

1.3Pipe end is not heavy head, easy to rectify

1.4High production efficiency and low cost

2.Classification

2.1Basic classification method

According to the nominal diameter of the product, the pressure level, the ring stiffness and the axial force level classification.

2.1.1According to the nominal diameter (DN) classification

DN400mm,DN450mm,DN500mm,DN450mm,DN600mm,DN700mm,DN800mm,DN900mm,DN1000mm,DN1200mm,DN1400mm,DN1600mm,DN1800mm,DN2000mm,DN2200mm,DN2400mm,DN2600mm,DN2800mm,DN3000mm,DN3200mm,DN3400mm,DN3600mm.

2.1.2Classification by pressure level (PN)

According to the pressure level is divided into: 0.6MPa, 0.25MPa,1.0MPa, 1.6MPa, 2.0MPa.

2.1.3Classification by circumferential stiffness (SNh)

According to the ring stiffness is divided into: 5000N/m2 ,7500N/m2 ,10000N/m2 ,12500N/m2 ,15000N/m2 .

2.1.4According to the axial stress level (FD) classification

According to the axial force level is divided into: 30t, 50t, 80t, 100t, 120t, 150t, 200t.

Note: other pressure levels, stiffness and the top force level can be determined by the supply and demand sides.