When drilling with a rotary drilling rig, it's inevitable that drilling will encounter sandy or silty soil layers. What construction methods should be used for these strata? These strata are susceptible to water erosion due to the lack of cohesion between particles. Furthermore, the up-and-down movement of the drill bit during construction, coupled with the high velocity of water flowing outside the drill bit, further exacerbates this erosion. For these strata, slurry wall drilling is necessary. Below we will introduce the construction method.#rig pile machine#
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When using the slurry wall method for construction, the following measures should be considered.
Appropriately reduce the speed of lowering and withdrawing the drill bit to reduce the slurry flow rate between the drill bit and the hole wall, thereby minimizing scour.
Appropriately increase the area of the water flow holes in the drill bucket to reduce the negative pressure at the top and bottom of the drill bucket during withdrawal, thereby reducing the slurry flow rate in the hole.
For construction in sandy and silty soil formations#rig pile machine#
In fact, there is no difficulty in the construction of sandy soil and silt soil. The main thing is to master the points we mentioned above and the construction will be much easier. The use of small rotary drilling rigs requires carefulness. When we are free, we can look at more examples of rotary drilling rig construction and learn from others' construction techniques, which is very useful to us.#rig pile machine#
