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Whole process construction method of driven cast-in-place piles and special device for same

A technology of immersed tube grouting piles and construction methods, which is applied to sheet pile walls, foundation structure engineering, foundation structure tests, etc., and can solve the problems of easy deviation of the reinforcement cage, inconvenient operation of the rear insertion reinforcement cage, low noise, etc.

Active Publication Date: 2011-12-21
毕建东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of pile is a non-squeeze pile with low vibration, low noise, strong hole penetration ability, and good pile quality, but the operation of inserting the reinforcement cage is inconvenient, the reinforcement cage is easy to shift, and the bearing capacity of the pile end is low.

Method used

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  • Whole process construction method of driven cast-in-place piles and special device for same
  • Whole process construction method of driven cast-in-place piles and special device for same
  • Whole process construction method of driven cast-in-place piles and special device for same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0258] Embodiment 1 The implementation method of the whole process construction method of the immersed pipe grouting pile using the A2 type pile pipe is as follows:

[0259] A construction project site, soil layer from top to bottom: 2m thick miscellaneous fill, 8m thick plastic state silty clay, 2m thick fully weathered mudstone, 2m thick strongly weathered mudstone, the following is moderately weathered mudstone.

[0260] The designed pile diameter is 800mm, the pile length is 15m, the bearing layer at the pile end is moderately weathered mudstone, and the ultimate bearing capacity of a single pile is 1700t, of which: the ultimate resistance of the pile end is 1300t, and the ultimate resistance of the pile side is 400t.

[0261] Basic data of pile pipe: circular outer pipe 1 has an outer diameter of 800mm and a wall thickness of 30mm; Form upper plate 4 external diameter 740mm, thick 50mm, central circular hole diameter 195mm; Nut 5 internal diameter 190mm, high 50mm; Intern...

Embodiment 2

[0278] Embodiment 2 The implementation method of the whole process construction method of the immersed pipe grouting pile using the A5 type pile pipe is as follows:

[0279] Site conditions, pile diameter, and bearing capacity are the same as above.

[0280] Basic data of pile pipe: circular outer pipe 1 has an outer diameter of 800mm and a wall thickness of 30mm; circular pouring pipe 2 has an inner diameter of 150mm and a wall thickness of 20mm, and each side of the lower end is thickened by 20mm; circular slurry discharge pipe 10 has an inner diameter of 150mm and a wall thickness of 20mm; The snap ring 13 is 50mm high, and the diameter of the circular hole is 195mm; the outer diameter of the circular lower plate 14 is 820mm, and the height is 200mm.

[0281] Basic data of E-type backing plate: round thin steel plate 47 thick 3mm, diameter 850mm; round thick steel plate 42 thick 30mm, diameter 180mm, round hole 46 diameter 180mm.

[0282] 2.1 Test pile: After the mud retai...

Embodiment 3

[0292] Embodiment 3 The implementation method of the whole process construction method of the immersed pipe grouting pile using the B1 type pile pipe is as follows:

[0293] Site conditions, pile diameter, and bearing capacity are the same as above.

[0294] Basic data of pile pipe: circular outer pipe 21 with an outer diameter of 800mm and a wall thickness of 30mm; a ring 24 with an outer diameter of 820mm; an inner hammer 22 with a weight of 10t, of which: the hammer body 34 has an outer diameter of 700mm, an inner diameter of 600mm, and a wall thickness of 50mm; The plate 30 has a diameter of 720 mm and a height of 200 mm; the inner tip 33 has a diameter of 100 mm at the upper and lower segments, a diameter of the middle segment of 60 mm, a height of 50 mm at the upper segment, a height of 150 mm at the middle segment, and a height of 100 mm at the lower segment; the circular upper plate 31 has an inner diameter of 600 mm, an outer diameter of 1 m, and a thickness of 50 mm; ...

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Abstract

The invention provides a whole process construction method of driven cast-in-place piles and a special device for the same. The special device comprises pile pipes and base plates, wherein the pile pipes comprise class-A pile pipes, class-B pile pipes and class-C pile pipes. The whole process construction method comprises a pile testing method, a pile manufacturing method, a pile measuring method and a bottom vibration method for inserting reinforcement cages later. The construction method and the device have the following beneficial effects: the problem of higher control difficulty and pile tip cost of the traditional internally driven piles is solved; compared with the long augered press-grouting piles, the driven cast-in-place piles manufactured with the construction method have the pile tip bearing capacity improved by several times; with respect to the aspects of pile testing and pile measuring, the pile tip resistance is obtained not by pressing the whole piles but by pressing the cast-in-place pipes or inner tips with sections being much smaller than the sections of the whole piles, the pressed pile tonnage is greatly reduced and the pile testing and measuring costs and construction periods can be substantially reduced; the ultimate resistance of the tips of the long augered press-grouting piles with diameter being 800mm under the given soil horizon condition is within 400t, but the ultimate resistance of the tips of the piles manufactured by using the construction method exceeds 1300t, which is more than three times that of the tips of the long augered press-grouting piles; and the construction method and the device have good technical and economic benefits.

Description

technical field [0001] The invention relates to a whole-process construction method and a special device for immersed pipe grouting piles, and belongs to the technical field of pile foundation construction. Background technique [0002] The whole-process construction method of piles includes pile test method, pile making method and pile testing method. [0003] The Chinese invention patent with the application number 200910066975.3: the whole process construction method of internal driving pile and its special device and application, proposed the internal driving method for making piles and the small area method for pile testing and pile testing, which can reduce the comprehensive cost of pile foundation engineering , but there are problems such as difficult control and high pile tip cost. [0004] The patent number is 200920094048.8 utility model patent: jack for pile end resistance detection (hereinafter referred to as: detection jack), and also provides a special detecti...

Claims

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Application Information

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IPC IPC(8): E02D5/38E02D5/66E02D7/28E02D33/00
Inventor 毕建东
Owner 毕建东
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