Piling method

Abstract

The present invention discloses a construction method of building pile foundation engineering, in particular, it relates to a pile-forming method of pipe-sinking belled pile. Said pile-forming method includes the following steps: pressing the sinking pipe with metal pile head to the hard soil layer with designed level; taking out the metal pile head, utilizing belling equipment to enlarge base and make said base portion be formed into a base hollow cavity; borrowing; placing the radial steel bars into the base hollow cavity and nailing said radial steel bars into the hard soil layer, pouring the prepared concrete into the base hollow cavity to obtain concrete base; downwards placing the prefabricated reinforced concrete pile body and making said prefabricated reinforced concrete pile body and cast-in-situ concrete base be butt-connected together by means of inserted bars of base portion and anchored into one body; drawing out said sinking pipe so as to obtain the invented pile.

Description

technical field [0001] The invention relates to a construction method of building pile foundation engineering, in particular to a method for forming piles of sinking tube and expanding bottom piles. 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 pile fo...

AI Technical Summary

Problems solved by technology

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 pile foundation engineering construction method is manually Excavate the soil, take the soil and dig the pile body soil, and then dig down a certain depth to prevent the collapse of the immersed pipe. On the hard soil layer, after forming, hoist out the bottom expansion equipment to take soil, and then directly pour concrete into piles

Thereby it can be seen that the traditional method of forming pile foundation piles also has the following defects: part of the soil body of the pile body is manually dug out, the construction surface is too large, the workload of taking soil is obviously increased, the work efficiency is low, and the cost is high; Immersed tubes are used as support, the positioning is not accurate, the expansion angle of the base is too small, and the parameters in the bottom expansion process cannot be guaranteed, so that the quality of the pile is not easy to control, and it is difficult to meet the design requirements, resulting in a greatly reduced bearing capacity of the single pile; Potential safety hazards for construction personnel, accidents are likely to occur if construction personnel do not pay attention; the scope of use is narrow, not only not suitable for bottom expansion of small-diameter piles, but also cannot be used for bottom expansion and pile formation in prefabricated piles and highly complex geological conditions