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Ultralong and ultradeep prestressed high strength concrete centrifuge tube pile construction method

A construction method and prestressing technology, applied in sheet pile wall, foundation structure engineering, construction, etc., can solve the problems of restricting the application of PHC piles, the pile feeder is not easy to be pulled out, and the depth of the pile tip into the soil is large, and the construction efficiency is achieved. High, avoid vertical cracks, the effect of stable pile body

Active Publication Date: 2012-05-23
CHINA MCC5 GROUP CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the construction of ultra-long and deep PHC piles with a pile delivery depth of more than 10 meters, due to the length of the pipe pile, the ratio of the length to the diameter of the pile is large, and the depth of the pile tip is large, a larger pile hammer is required. During construction, it is easy to cause high hammering stress on the top of the pile, which will damage the pile head; the depth of the pile feeding is long, and the pile feeding device is not easy to pull out; the piles are dense, which is easy to cause the plane displacement of the pile
These defects limit the application of PHC piles in deep foundation treatment

Method used

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  • Ultralong and ultradeep prestressed high strength concrete centrifuge tube pile construction method
  • Ultralong and ultradeep prestressed high strength concrete centrifuge tube pile construction method
  • Ultralong and ultradeep prestressed high strength concrete centrifuge tube pile construction method

Examples

Experimental program
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Effect test

Embodiment 1

[0019] A construction method for ultra-long deep prestressed high-strength concrete centrifugal pipe piles. The outer diameter of the PHC pile is 400mm and the length is 70m. The construction method includes a. pile making, b. pile inspection, c. hanging pile, d. sinking pile, e. The eight steps of measuring pile position, f. inserting pile, g. hammering pile and h. connecting pile are characterized by:

[0020] a. Pile making: the length of the single-section pile is 7m, and the wall thickness of the pile body is 95mm; steel fibers are evenly added to the concrete at the end of the pile into the soil, and the addition amount is 25kg per cubic meter of concrete.

[0021] like figure 1 As shown, on the end face of the pile 11 buried in the soil, a pipe material with the same external diameter as the pile 11 is fixed as the pile point 12, and the length of the pile point 12 is 1 to 3 times of its external diameter, and then fixed on the outside of the pile point 12 ends 2 arc-s...

Embodiment 2

[0030] A construction method for ultra-long deep prestressed high-strength concrete centrifugal pipe piles. The outer diameter of the PHC pile is 500mm and the length is 80m. Its characteristics are: when the pile is hammered at g, the hammering force is within 7000kN, and the others are the same as in Example 1. .

Embodiment 3

[0032] A construction method for ultra-long deep prestressed high-strength concrete centrifugal pipe piles. The outer diameter of the PHC pile is 600mm and the length is 90m. Its characteristics are: when the pile is hammered at g, the hammering force is within 8000kN, and the others are the same as in Example 1. .

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Abstract

The invention relates to the field of the pile cutting or filling construction method utilizing prestressed concrete parts and pouring concrete parts on site, in particular to an ultralong and ultradeep prestressed high strength concrete centrifuge tube pile construction method. The construction method comprises the following steps: a. preparing piles; b. checking piles; c. lifting piles; d. sinking piles; e. measuring piles positions; f. inserting piles; g. hammering piles; and h. connecting piles. The construction method is characterized in that when preparing piles, the length of each pile is within 10m, the wall thickness of each pile is 90mm-100mm; steel fiber is evenly added in the concrete of the ground end of each pile, and the dosage is 25kg for 1m<3> concrete. The construction method of the invention has convenient and safe operation and high construction efficiency, the pile driving quality can be ensured, and the method is applicable to the construction of deep piles, in particular to PHC pile with the pile driving depth of 60m-80m.

Description

technical field [0001] The invention relates to the field of construction methods for excavating or filling piles using prefabricated concrete parts and on-site concrete parts, in particular to a construction method for ultra-long deep prestressed high-strength concrete centrifugal pipe piles. Background technique [0002] Prestressed high-strength concrete centrifugal piles, referred to as PHC piles, are concrete prefabricated components developed on the basis of modern high-performance concrete and prestressing technology. PHC piles are pre-tensioned and centrifugally formed. A hollow cylindrical member of equal cross-section made by maintenance, after being transported to the construction site, it is sunk into the ground by hammering or static pressure as the foundation of the building. Since the mid-1990s, PHC piles have been gradually applied in construction projects. Under the same bearing capacity, the investment of PHC piles is equivalent to 60% of steel pipe concre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/58E02D5/50
Inventor 李华安杨金尚
Owner CHINA MCC5 GROUP CORP