Pile with pile shoulder and pile foundation construction method for pile

Abstract

The invention discloses a pile with a pile shoulder. The pile is provided with a cylindrical pile body and the discoidal pile shoulder extending outwards, from the outer surface of the pile body, perpendicular to the axis of the pile body, and the pile shoulder is arranged on the lower half of the pile body. The invention further discloses a pile foundation construction method adopting the pile. The pile foundation structure with the pile shoulder is especially suitable for pile foundations on geologic structures shallow in buried bedrock depth, with bedrock exposed and low in bedrock strength. Applying the technology for pile position pore-forming is high in mechanization degree, high in pile position positioning accuracy, high in quality, and capable of quickly forming high-quality pile foundation foundations of high pile wharves to meet requirements of quick and large-area island-forming construction under marine construction environments, especially offshore coral island reef sites scarce in floor materials.

Description

technical field [0001] The invention relates to a pile foundation structure with a pile shoulder and a technology for forming holes by countersunk milling at pile positions. Background technique [0002] The hydraulic structure of the high pile cap structure has a simple structure, less sand and stone consumption, and the structure is air-permeable, which has little effect on wave reflection, is easy to berth, and has good berthing conditions; There is less mud, so it has less impact and damage to the natural environment, and is widely used in wharf construction. The pile foundation has the characteristics of strong bearing capacity and strong adaptability to water depth. [0003] Concrete prefabricated piles and steel prefabricated piles are widely used in port engineering, and bored piles or rock-socketed piles are used on some geological foundations where the bedrock is shallow. The so-called rock-socketed piles are prefabricated piles (also known as steel casings) plac...

AI Technical Summary

Problems solved by technology

[0005] In the seabed with exposed bedrock, shallow bedrock area, sandstone, coral reef or other bedrock geology, the traditional friction pile foundation construction method is basically infeasible, and the use of end-bearing rock-socketed piles is also not feasible. It is very difficult. The pile foundation of the hammer sinking pile is rarely penetrated into the soil, and it is difficult to stabilize itself. Even if other methods are used to stabilize the pile foundation, and because the pile foundation is rarely penetrated into the soil, the pullout resistance is limited, the construction is very difficult, and the efficiency is low. The cost of the project is extremely high

[0006] Especially on the soft "bedrock" like coral reefs, due to the limited strength of the bedrock itself, the bedrock has relatively high compressibility, and even has many pores. The soil cohesion is destroyed, resulting in lower strength of rock and soil, and at the same time, the horizontal resistance is not improved, resulting in not only difficult construction of piles but also weak bearing capacity

However, rock-socketed piles mainly end-bearing cannot reliably bear the load transmitted by the pile foundation due to the limited area of ​​the pile diameter section and the low strength of the bedrock.

Therefore, according to conventional design and construction, only the most primitive bored cast-in-place piles are available, but the construction efficiency of bored cast-in-place piles is relatively low, consumes a lot of resources, has a large construction work area, many auxiliary operations, and causes great environmental pollution. It is seldom used under offshore conditions, and it cannot meet the requirements of efficient, fast, large-scale construction and rapid construction of islands and reefs

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