Insertion and receiving shaft
Insertion and receiving shafts for pipe jacking are placed at the start and end points of drives in greater depth. Usually their shape is a cylinder, which is best suited to bear the occurring forces. Pipe jacking shafts are temporary structures required for the building work, but they may also serve as permanent manholes.
Features
- • Tight pipe connections with interlocking spigot and bell as specified in DIN EN 1916 and elastomeric sliding ring seal as specified in DIN EN 681-1;
- • Protruding steel-reinforced concrete bell, beveled inside;
- • Recess for interlocking connection with hydraulic concrete;
- • Recess for structural connection with steel-reinforced concrete bottom slab;
- • Pipe passage section (entrance and exit ring) made of glass fibre-reinforced concrete with injection nipples;
- • Alternative design as required by the customer;
- • Round head transportation anchors, DEHA system;
- • steel-reinforced concrete cover slabs.
If a shaft is designed as manhole for permanent use after the building work we install a step and channel element, a steel-reinforced concrete reducing slab as a ceiling, and a DN 1000 access opening.
Both systems are suitable for any installation depth and are installed using the Caisson method. To facilitate the installation process a steel-reinforced concrete cutting edge is attached to the lower edge of the shaft. Depending on the outer shaft diameter the cutting edge is between 25 and 40 mm wider than the shaft.
Benefits
- Use of circular shafts allows choice pipe jacking in any direction;
- Dewatering not required;
- Vibration-compacted, smooth, non-porous concrete surface for easier lowering into the ground;
- Exact positioning of pipe passage sections (entrance and exit ring) and glass fibre-reinforced concrete covers;
- Thrust blocks for pipe jacking force in the bottom of the insertion shaft;
- Shaft drawings available on short notice based
on the following information:
- ground surface profile
- ground water level
- deflection angles
- pipe invert level
- jacking pipe exterior diameter
- type of pipe jacking machine
Download Brochure "Insertion and receiving shaft" (pdf)
