Pile foundation construction method

Abstract

The present invention discloses a construction method of building pile foundation engineering, in particular, it relates to a pile foundation construction method of pipe-sinking belled pile. Said construction method includes the following steps: pressing the sinking pipe with metal pile head to the hard soil layer with designed level; taking out metal pile head, using belling equipment to enlarge base and make the base portion be formed into a base hollow cavity; borrowing; pouring prepared concrete into the base hollow cavity to form a cast-in-situ concrete base; injecting cement slurry along the internal wall of said sinking pipe, then drawing out said sinking pipe so as to obtain the invented building pile.

Description

technical field

[0001] The invention relates to a construction method of a building pile foundation project, in particular to a pile foundation construction method of an immersed tube bottom expansion pile. Background technique

[0002] The quality of building foundation works will directly affect the quality of buildings, so the construction units not only pay attention to the construction quality of above-ground buildings, but also pay more attention to the quality of foundation works. And invest in scientific research to tap the potential of pile foundation engineering, so that it can improve the utilization rate of material strength on the premise of ensuring the quality of the project. In order to improve the bearing capacity of single piles, expanded bottom piles and composite foundation piles have appeared one after another. Although this has significantly improved the bearing capacity of single piles compared with traditional foundation piles, because the traditional...