Bottom-expanding pile-forming method for immersed tube club-footed pile

Abstract

The invention discloses construction pile engineering and construction method, especially bottom expanding and pile forming method for sinking-pipe bottom expanded piles, comprising following steps: pressing the first segment of sinking tube into soil, connecting the second segment of tube with the thread on the top of the first segment of tube, pressing the sinking tube to hard soil of designed elevation; taking out the metal pile head, putting into emulsible oil or AN-TNT explosive through the sinking tube mouth, and removing the articles blocking the sinking tube mouth after explosion is completed; taking out the broken soil by using an air soil suction device; sinking the sinking tube, activating the machine to expand the bottom; taking out the soil for the second time by using the air soil suction device; sinking the prefab concrete pile body and anchoring same with the cement paste base which is poured on site is anchored integrally by inserted steel bars at the bottom of the pile body; pouring cement paste along the sink tube mouth inner side, pulling out the first segment of the sinking tube and the second segment of the sinking tube at the same time, and then the pile is constructed. According to the invention, the expanded bottom has a regular geometric figure, soil is taken out cleanly, no granule soil is left, efficiency thereof is high, and bearing capacity of a single pile is enhanced effectively.

Description

[0001] This application is a divisional application with the application number: 200610047891.1, the application date: September 26, 2006, and the invention name: bottom expansion and pile forming method of sinking tube bottom expansion pile. technical field [0002] The invention relates to a building pile foundation engineering and a construction method, in particular to a method for expanding the bottom and forming piles of bottom-expanding piles with sinking tubes. 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 utilization rate of material strength on the premise of ensuring the quality of th...

AI Technical Summary

Problems solved by technology

[0004]1. Part of the soil in the pile body was excavated manually, the construction surface was too large, the workload of soil extraction increased significantly, and the efficiency was low;

[0005]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 pile 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;

[0006]3. There are potential safety hazards for construction personnel, and accidents are likely to occur if construction personnel do not pay attention;

[0007] 4. The scope of use is narrow, not only not suitable for small-diameter pile bottom expansion, but also not suitable for bottom expansion and bottom expansion of prefabricated piles and highly complex geological conditions. Pile;

[0008]5. The granular loose soil sediment in the cavity of the expanded bottom is not clean, which has a serious adverse effect on the bearing capacity of the pile. Based on the above situation, in order to improve the unit Pile bearing capacity, to reduce foundation engineering costs, must be improved

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