Construction foundation working method

Abstract

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

Description

technical field [0001] The invention relates to a construction method of building pile foundation engineering, in particular to a construction method of building foundation. 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 foundation engineering cons...

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

Thus it can be seen that the traditional pile foundation building foundation construction method also has the following defects: the pile body part of the soil 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; There is no immersed tube for support, the positioning is not accurate, the expansion angle of the base is too small, and various 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; There are potential safety hazards for construction personnel, and accidents are likely to occur if construction personnel do not pay attention; the scope of use is narrow, not only not suitable for small-diameter pile bottom expansion, but also cannot be used for bottom expansion and formation of prefabricated piles and high-complex geological conditions. pile