Here we choose the method of extubation and is done as follows:
- Borehole after dredging is carried out concreting. If this process is too long, they must take samples at the bottom of the borehole fluid. When the characteristics of the solution are not good, they must implement the solution flow until satisfactory.
- With the first batch of concrete to use with foam button, ensuring that concrete is not in direct contact with water or drilling fluids, eliminating the vacuum when placing.
- the mouth of the pipe below the borehole bottom Tremie way from 25 ÷ 30 cm. In the bottom of the tube down his mouth always 2.5m deep in concrete and concrete extruding from the bottom extrusion.
- When Bentonite solution is pushed out, the need for movement of sand pumped to recover in time to the refinery, abstain Bentonite concrete to fall into harm gelling increases the viscosity of Bentonite.
- When you see the peaks close to concrete reinforcement rise should pour slowly to avoid breaking thrust beard reinforced welds to the wall.
- to avoid the need to draw up occlusion lowered several times, but still have submerged pipe in concrete as required above.
- When pouring concrete pouring concrete have high extrusion design cos .so of course have to pour concrete high pass because of the design is the first concrete poured extrusion pushed up from the bottom boreholes should also impurities and concrete quality is not guaranteed.
- Pipe spill, they should be washed immediately. Position must be located away from the pile tube washing avoid
water flowing into the borehole.
* Requirements:
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