Bottom-expanded pipe pile with unfolded blades and pile driving method thereof

Abstract

The invention discloses a bottom-expanded pipe pile with unfolded blades and a pile driving method thereof. The bottom-expanded pipe pile with the unfolded blades comprises a master pile, a cavity is reserved in the master pile, and the blades are arranged at the bottom end of the master pile and movably connected with the bottom of the master pile through connecting devices. A push-open device is also arranged on the bottom of the master pile and can fold and unfold the blades. In the pile driving process, the master pile is prefabricated firstly, then the blades are prefabricated and additionally arranged, the assembled blades are in a folded state before pile driving, the master pile is driven into a soil layer completely through hammering or static pressure, the blades are unfolded and concrete is poured. By means of the bottom-expanded pipe pile with the unfolded blades and the pile driving method thereof, the bearing capacity of the pile is enhanced by tens of times, meanwhile, the project quality is improved, and security is improved to a great extent.

Description

technical field [0001] The invention relates to the fields of industrial and civil construction, and is used for foundation engineering in construction engineering, in particular to a bottom-expanded pipe pile with unfolded blades and a pile driving method thereof. Background technique [0002] Since the 21st century, with the rapid development of my country's economic construction, the utilization of underground space has become a new development direction. It is also getting more and more attention. How to improve the bearing capacity of the pile, reduce the length of the pile and use the soil space in foundation engineering has been paid more and more attention. What's more, the underground buildings and structures in the high water level soil layer tend to bear large water buoyancy. In order to reduce the impact of water buoyancy on underground buildings, uplift pile foundations are usually required. For traditional precast concrete square piles and pipe piles, the be...

AI Technical Summary

Problems solved by technology

In order to meet the bearing capacity requirements, it is usually economically unreasonable to increase the number of piles or increase the length of the pile itself.

In addition, due to the excessive length of the pile during the pile sinking process, it is easy to cause the pile body to break, the pile body is inclined, and the pile sinking cannot meet the design requirements; moreover, due to the limitation of transportation, the long piles are usually segmented during prefabrication. Prefabricated, after being transported to the site in sections, the pile body needs to be lengthened during the pile sinking process, resulting in a lot of manpower and material costs; moreover, the pile body is lengthened on site, and the quality is affected by site conditions, weather and human factors. , There are often loose and cracked piles; traditional extensive construction methods have seriously hindered the construction of a low-carbon and harmonious society

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