Working Principle of Multi-pipe Drilling Rig:
SMW method: mix and agitate soil and cement slurry in the original position to form underground diaphragm wall; The machine can be divided into three categories according to diameters: Ф650, Ф850 and Ф1000.
Two Types of SMW method:
①mixed by original soil and cement;
②inserting core materials into cement agitation body;
       
Advantages of Multi-pipe Drilling Rig:
1. Higher cutoff performance;
2. Lower impact on the surrounding ground;
3. Shorter construction period;
4. Multi-application;
5. Low vibration and noise;
6. Less spoils;
7. Less wall strength is required;
Applications of Multi-pipe Drilling Rig:
It’s widely applied to the following fields:
Excavation support wall
Cut off wall
Ground reinforcement
Applicable soil of Multi-pipe Drilling Rig:
clay, powder soil and strong weathered rock. All kinds of soil whose standard penetration value is less than 50.
Construction Procedure:
When SMW drilling rig drills, cement slurry is poured into the left and right drilling pipes and compression air is injected into the middle drilling.
       
Applicable soil:
clay, powder soil and strong weathered rock.
And all kinds of soil whose standard penetration value less than 50.
Main Parameters of Multi-pipe Drilling Rig: