Piling Machinery XMZ120A Anchor Drilling Rig
As an advanced small drilling equipment, multi-functional bolting drilling rig has the characteristics of compact structure, flexible operation, wide adjustment range and strong adaptability to working conditions. By selecting different working devices, a variety of construction methods can be realized, which are widely used in construction fields such as foundation pit support, slope anchoring, tunnel pipe shed support, micro-pile, grouting pilot hole, high-pressure rotary spray grouting and so on. Please explore these little secrets of the construction method with the editor:
1. Foundation pit support, foundation anti-floating
The method is a commonly used support measure for excavation construction of foundation pit by drilling holes and installing anchor cables on the side wall of the foundation pit by bolt drilling rig to improve the stability of the side wall of the foundation pit by using the formation anchoring force.
For some deeply buried foundation pit structures, the foundation pit floor is easily affected by the surrounding groundwater and the upward instability damage occurs. By constructing anti-floating anchors, the foundation pit floor is connected with the lower soil, which can play an anti-floating role.
Working device and construction method: supporting top drive hydraulic impact power head + pipe drilling tool, impact rotary drilling, water circulation slag discharge during the drilling process.
2. Tunnel pipe shed, advanced grouting Pipe shed is a kind of advanced support technology in tunnel construction. Bolt drilling rigs are used to drill holes beyond the tunnel excavation contour, insert steel pipes and grout to reinforce the weak and broken formation, thereby ensuring the safety of tunnel construction.
When the tunnel is in the groundwater development area, it is necessary to use the bolt drilling rig to drill densely arranged grouting holes on the face of the face, and then insert the grouting pipe and reinforce the grouting to improve the impermeability of the surrounding rock and ensure the safety of tunnel construction and operation.
Working device and construction method: supporting top drive hydraulic impact power head + pneumatic DTH hammer, impact rotary drilling, air slag discharge during the drilling process.
3. High pressure spin spray
During the construction of high-pressure rotary spraying, the bolt drilling rig is used to directly rotate the grouting pipe with nozzle and lower it into the soil layer, and the high-pressure equipment is used to spray the cement slurry into the formation in a high-pressure jet state, and the soil particles are forcibly mixed and mixed, and after the slurry is solidified, a continuous consolidation body is formed in the soil, so as to achieve the purpose of strengthening the foundation or stopping water and preventing seepage.
Working device and construction method: supporting rotary spray power head + multi-pipe rotary spray drilling tool, rotary drilling without slag discharge.
4. Grouting pilot hole
When high-pressure rotary spray or grouting plugging construction is carried out in complex formations, because the grouting pipe cannot be inserted directly, it is necessary to use the bolt drilling rig to drill the pilot hole first, use the casing to protect the borehole, and then separately enter the grouting pipe for grouting .
Working device and construction method: supporting top drive hydraulic impact power head + pipe drilling tool, impact rotary drilling, water circulation slag discharge during the drilling process.
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