⑸继续钻进压入护筒：卸下护筒卡具，更换钻头，继续钻进3～5m后，再继续

⑸继续钻进压入护筒：
卸下护筒卡具，更换钻头，继续钻进3～5m后，再继续压入护筒。从施工现场地质条件来看，地质条件较好，地下水位较低，一般钢护筒埋深约2～3m即可。
护筒埋设完成后，进行正式钻进。钻进硬质土层时，应准确保证钻杆垂直，加大钻杆对土层压力，缓慢进尺，采用高转速，小跟进量，匀压钻进。在较松散的灰岩层中钻进时，要减缓进尺速度，减少钻杆晃动，以免扩大孔径。

結果 (英文) 1:

⑸ Press continues to drill into the casing:Remove the pipe clamps, change the drill bit and resume drilling after 3~5M, and then continued to press into casing. From the construction site of geological conditions, geological conditions, groundwater level is low, General steel casing depth is about 2~3M.Pipe laying is complete, drilling with an official. When drilling hard soil should be accurate and ensure the drill pipe vertically, increase the drill pipe to soil pressure, slow footage, using high speed, small amount of follow up, the level of drilling. When drilling in a relatively loose limestone, to slow driving speed, reduce the pipe shaking, so as not to expand aperture.

結果 (英文) 2:

⑸ continue drilling pressed into the casing:
remove casing fixtures, replace the drill bit to continue drilling 3 ~ 5m, and then continue to push into the casing. From the point of view of construction site geological conditions, geological conditions are better, the lower the water table, usually steel casing depth of about 2 ~ 3m can.
After the casing is buried completed formal drilling. When drilling hard soil, should ensure accurate vertical drill, drill pipe to increase the pressure on the soil, slow footage, high-speed, small amount of follow-up, the isostatic drilling. While drilling in a relatively loose limestone layer, to slow down the footage speed, reduce drill shaking, so as not to expand the aperture.

結果 (英文) 3:

The press to continue drilling casing:Remove the tube clamp, replacing the drill bit, drilling to 3 ~ 5m, and then continue to pressure into the tube. From the construction site geological conditions, the geological condition is good, the groundwater level is low, the general steel tube buried depth of about 2 ~ 3M can be.The embedding cylinder after the completion of the formal drilling. When drilling in the hard soil layer should be accurate assurance drill pipe vertical, increase the drill pipe to soil pressure, slow footage, using high speed, to follow up on small, uniform pressure drilling. Drilling in limestone loose when to slow penetration rate, reduce pipe shaking, so as not to expand the aperture.