The construction process of mud-protected bored piles is as follows: site leveling, pile placement, excavation of slurry pool, grout ditch, burying of protective tube, drilling rig in place, hole position correction, hole formation, mud circulation, removal of waste slurry, mud Slag, first hole cleaning, quality acceptance, lower reinforcement cage and steel pipe, second hole cleaning, pouring underwater concrete, pile formation.

        Reinforced concrete cast-in-place pile is a pile made by directly forming a hole on the site of the pile, then pouring concrete in the hole or placing a steel cage and then pouring the concrete.

       1. Compared with the hammering method sinking into the pile, the construction noise and vibration are much smaller;

       2. It can build piles much larger than the diameter of precast piles;

       3. It can be used on various foundations;

       4. The construction quality has a great influence on the bearing capacity of the pile;

       5. Because the concrete is poured in muddy water, the quality of the concrete is difficult to control.