Safety pile foundation construction method

Abstract

The invention discloses a building pile foundation engineering construction process, especially relating to a safe pile foundation construction process, comprising: pressing sinking pipe with metal pile head to the pan at the designed level; taking out the metal pile head and blasting away soil body with detonator; taking out soil; pouring the concrete ready made on ground into foundation cavity to make concrete foundation; placing in prefabricated steel concrete pile body; grouting along the inside of the sinking pipe orifice and then drawing out the sinking pipe to make it. As compared with the existing techniques, it has features of simple and advanced process, high efficiency, effectively improving single pile bearing capacity and reaching design requirements, assuring pile foundation engineering quality, reducing building cost, raising material intensity utilization ratio, making the pile work in the most economic state and assuring engineering quality reaches the design requirements and improving construction safety.

Description

Technical field [0001] The invention relates to a construction technology of a building pile foundation project, in particular to a safe pile foundation construction method. Background technique [0002] The quality of building foundation works will directly affect the quality of buildings. Therefore, construction units not only pay attention to the construction quality of above-ground buildings, but also pay more attention to the quality of basic works. In order to improve the bearing capacity of single piles, expanded bottom piles and composite foundation piles have appeared one after another. Although this is significantly improved than the single pile bearing capacity of traditional foundation piles, the traditional construction method of pile foundation engineering uses a little bit of manual work. Dig the soil, take the soil to dig the pile body soil, and in order to prevent the collapse, dig down a certain depth of the sinking pipe. When the design elevation is reached, th...

AI Technical Summary

Problems solved by technology

[0003] 1. Part of the soil body of the pile is dug out manually, the construction surface is too large, the workload of soil extraction is obviously increased, and the efficiency is low;

[0004] 2. Since there is no immersed tube as support for the bottom expansion equipment, 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 the single pile The bearing capacity is greatly reduced;

[0005] 3. There are potential safety hazards for construction personnel, and construction personnel are prone to accidents if they do not pay attention;

[0006] 4. The scope of use is narrow, and it cannot be used for bottom expansion and pile formation in prefabricated piles and highly complex geological conditions