Tag Archives: slurry system

Brief Introduction about the Micro-tunneling Pipe Jacking Method

Brief Introduction about the Micro-tunneling Pipe Jacking Method

Micro-tunneling technology for trenchless installation of supply and disposal tunnels by pipe jacking method, ID200-ID3000
The main object is to find a balance between customer requirements and the requirements of nature and the environment.
The technologically advanced products allow us to make life easier for many people all over the world and use trenchless technology to conserve resource and focus on sustainability.
Machines that fit customer needs!
General speaking, there are 4 kids of micro-tunneling systems:
1. AugerPro system
2. Slurry System
3. EPB System
4. Hard rock system

Mirco-tunneling Grain layout

Mirco-tunneling Grain layout

microtunneling methold

microtunneling methold

AugerPro System is an economic micro-tunnelling solution for soft soil( sand, silt, clay) without boulders and with a very low groundwater level. It is suitable for small to medium diameters, and short to medium jacking lengths. The excavated soil is transported via Auger train to the start shaft; a spoil treatment is not necessary. The pipes are pushed in directly after the cutter head. The machine is easily operated from the control container on the surface. As a result of the laser -based guidance system, it can achieve a very high level of accuracy.

AUGERPRO SYSTEM

Micro-tunneling methold-AUGERPRO SYSTEM

Slurry System is essential in difficult soil with high ground water levels. It is suitable for very long distances and large diameters. In the cutter head, the excavated spoil is mixed with water and then transported to the surface, where water and spoil are separated again; the water then remains in the slurry circle.

Mirco-tunneling slurry job site

Mirco-tunneling slurry job site

1)Pipe
2)Control Container
3)Charge Pump
4)Mud Tank
5)Separation Plant
6)Start Shaft
7)Laser
8)Jacking Station
9)Discharge Pump
10)Intermediate Jacking Station
11)Steering Head
12)Trailer With Power Pack
13)Target Shaft
14)Flow Meter
15)Bentonite Pump
16)Generator

EPB system( Earth pressure balance shields) is that all non-stable ground require a support pressure to balance the earth pressure that is acting on the cuter disc. The excavated soil accumulates in the excavation chamber and , together with the driving force of the machine, builds the supports pressure. The spoil is transported out of the excavation chamber by a screw conveyor and is then brought to the launching shaft by conveyor belts or lorries.

EPB system

Micro-tunneling methold-EPB system

Hard rock system can be used in fractured and unfractured rock. In stable ground conditions, the machine is equipped with a gripper station to grip against the tunnel wall to move forward. In factured rock, the unstable tunnel wall is supported by pipes or segments.