Basic information of bored occlusal pile

The "pile wall" of bored bite piles is different from the "pile wall" composed of circular piles and irregular piles. The final setting of the concrete of the bite pile appears after the bite of the pile, which becomes a seamless and continuous "pile wall". Compared with ordinary bored pile, it greatly improves the shear strength and safety of supporting structure; It has good water interception performance, and does not need to carry out auxiliary water interception and soil retaining measures between piles through ordinary drilling and pile arrangement.

The function of bored bite pile is basically the same as that of diaphragm wall, but it is better than diaphragm wall, mainly in the following aspects: First, the reinforcement ratio is low. Occlusal piles are usually arranged with reinforced concrete piles and plain concrete piles at intervals, which greatly reduces the reinforcement ratio of supporting structures. Second, the impermeability is stronger. There is no construction joint between bored interlocking piles, but the construction joint at the joint of underground continuous wall is often the weak link of seepage control. Third, the construction is flexible, because the bored bite pile can turn and change lines as needed, so it is more suitable for foundation pit construction with variable geometry or various arcs.

Compared with ordinary bored piles and diaphragm walls, bored bite piles have the following advantages: 1. Full-pipe drilling rig is adopted, and there is always an advanced steel casing to protect the wall in the construction process, so there is no need for mud to protect the wall, which saves the cost of mud production, use and waste slurry treatment. The soil taken out is the original soil, which is conducive to civilized construction on site. Second, the coefficient of reaming (filling) is small, because the steel casing is always used to protect the wall during the construction process, which completely avoids the collapse of the hole wall, thus reducing the coefficient of reaming (filling) and reducing the amount of concrete pouring.

The seamless and continuous "pile wall" formed after the bite of bored pile determines that its construction tools must adopt a full set of steel casing pipe drilling machine, and be filled with super retarded concrete and suitable construction technology; Bored bite pile is especially suitable for urban buildings, which can reduce the engineering cost, improve the construction speed, ensure the quality of supporting structure and help the construction site to be civilized and clean.