Exploding bottom-expanding pile-forming method for immersed tube prefabrication steel concrete bottom-expanding pile

Abstract

The invention discloses a construction pile project and a construction process, in particular to an explosive-enlargement and pile forming process of steel concrete belled pile of a immersed tube which is pre-formed , which comprises pressing an immersed tube to a hard stratum with designed height mark through passing through a soft stratum, taking out a metal pile head, sealing the mouth of the immersed tube after detonating blasting agent, opening objects which are used to seal the mouth of the immersed tube after detonating blasting agent, taking soil with an air soil-absorbing device, detecting whether the quality reaches the designed requirement with a camera with light source in a cavity of a chassis, putting steel rids which take on irradiating form into a cavity of a chassis and nailing with firm soil, pouring quantitative cast-in-situ concrete to form a cast-in-situ chassis from the mouth of the immersed tube, putting pre-formed hollow pile body with initial stress which is integrated and anchored with the cast-in-situ chassis through dowel bars on the bottom portion, and drawing out the immersed tube pile after injecting cement plaster along the inner side of the mouth of the immersed tube.. The process can take soil without particle porous soil, has high efficiency, effectively increases the loading of single pile, guarantees the engineering quality of pile, reduces construction cost, and increases the material strength usage.

Description

[0001] This application is a divisional application with the application number: 200610047831.X, the application date: September 21, 2006, and the invention title: the blasting bottom expansion and pile forming method of immersed tube prefabricated steel concrete bottom expansion piles. technical field

[0002] The invention relates to a construction pile foundation engineering and a construction method, in particular to a blasting bottom expansion and pile forming method of immersed tube prefabricated steel concrete bottom expansion piles. Background technique

[0003] It is well known that the quality of building foundation works plays a vital role in the influence of building quality, so each construction unit not only pays attention to the construction quality of above-ground buildings, but also pays more attention to the quality of foundation works. And invest in scientific research to tap the potential of the pile foundation project, so that it can improve the utilizati...

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