XCMG XDN450 Operation Manual page 21

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made of bentonite as the parent material of the slurry, and is sent to the excavation surface at the
front end of the top of the pipe jacking machine by a slurry pump. The fluid mechanics and the
stability of the soil mechanics generated by the pressurized muddy water are formed on the
excavation surface. The cement-impermeable membrane, muddy water penetrates into the soil of
the excavation surface through the cutter head, and it will have the effect of suppressing the
hydraulic pressure of the site and the cohesive force of the earth pressure so as to achieve the
effect of stabilizing the cutting surface, and then using the cutter head of the pipe jacking
machine head, Cut the site of the excavation surface. In the construction of pebbles and hard
ground, the muddy water method can use a cutter head with a hob, and use a hob on the cutter
head to break the larger diameter pebbles or rocks for the first time. The conglomerate is broken
once. Through the opening of the cutter head into the secondary crushing chamber, the second
crushing is performed with the eccentric cone crusher in the head of the jacking machine.
Slurry water circulation is a compulsory circulation method. When the machine head starts
to operate, the mud in the pipe is always in a flowing state. The mud discharge valve is adjusted
through the amount of earth in the head by the operator. The muddy water is pumped to the
muddy water treatment equipment on the ground by mud pumping, and the debris is collected
and discarded. The muddy water is sent to the machine head for recycling.
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Product information ! 32