Refers to the pile formed in the foundation soil by mechanical drilling, steel pipe extrusion or manual excavation at the engineering site, and reinforced cages and concrete are placed in it. According to the different pore-forming methods, cast-in-place piles can be divided into immersed cast-in-place piles, bored cast-in-place piles and dug cast-in-place piles.

superiority

1. Compared with the hammer sinking method, the construction noise and vibration are much less;

2. Piles with a diameter much larger than that of precast piles can be built;

3. It can be used on various bases.

disadvantaged

1, the construction quality has a great influence on the bearing capacity of the pile;

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

3. It is labor-consuming and time-consuming, and the pore-forming speed is slow, and the sludge pollutes the environment;

Extended data

Operating conditions:

1. All the above-ground and underground obstacles have been dealt with, reaching "three links and one leveling". Temporary facilities for construction are ready.

2. The elevation of the site is generally the epithelial elevation of the capping beam, and the capping beam should be compacted or rolled.

3. The reinforcing cage shall be fabricated in sections with a length of 5 ~ 8m.

4. According to the drawing, set out the axis and pile position, copy the horizontal elevation pile, and pass the pre-inspection visa.

5. Before construction, pore-forming tests shall be conducted, and the number shall be no less than two.

6, select and determine the drilling rig in and out of the route and drilling sequence, formulate the construction plan, technical disclosure.

Baidu encyclopedia-long spiral drilling rig

Baidu encyclopedia-bored pile