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Rear-mounted concrete pile head fracturing method capable of achieving convenient lowering

A concrete pile head and rear-mounted technology, which is applied in the direction of sheet pile walls, buildings, and infrastructure projects, can solve problems such as time-consuming and labor-consuming, dust and noise pollution, and restrict project progress, and achieve efficient recovery of fractured devices. Decentralized installation and the effect of improving project quality

Active Publication Date: 2020-06-05
徐胜祥
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the concrete on the top of the pile is usually chiseled manually, which is time-consuming and labor-intensive, and generates dust and noise pollution, which affects the occupational health and safety of workers, increases the safety risk of the project, and restricts the progress of the project.

Method used

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  • Rear-mounted concrete pile head fracturing method capable of achieving convenient lowering
  • Rear-mounted concrete pile head fracturing method capable of achieving convenient lowering
  • Rear-mounted concrete pile head fracturing method capable of achieving convenient lowering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A post-mounted concrete pile head fracture method that is convenient for lowering, such as figure 1 shown, including the following steps,

[0032] A. The upper end of the reinforcement cage 1 is covered with a wrapping layer 11, and the wrapping layer 11 is an isolation medium such as pearl cotton or polyurethane. Install the reinforcement cage 1 on the drilled pile position to be constructed, and pour concrete;

[0033] B. After the concrete pouring is completed and before the concrete is solidified (this time period is generally 4-6 hours), the breaking device 2 is lowered;

[0034] The breaking device 2 includes a metal cover 22 and a curved casing 23 arranged from top to bottom, and an interlayer 231 is arranged on the outside of the curved casing 23, and the interlayer 231 is pearl cotton or polyurethane. Concrete or cast metal materials are poured into the cavity of the curved shell 23 . The lower side of the metal cover 22 is provided with a first jack 25 and ...

Embodiment 2

[0040] A post-mounted concrete pile head fracture method that is convenient for lowering, such as figure 2 shown, including the following steps,

[0041] A. The upper end of the reinforcement cage 1 is covered with a wrapping layer 11, and the wrapping layer 11 is pearl cotton or polyurethane. Place the reinforcement cage 1 again, and pour concrete;

[0042] B. After the concrete solidifies and reaches the initial strength (generally above 10 MPa), lower the breaking device 2;

[0043] The breaking device 2 includes a metal cover 22 and a curved casing 23 arranged from top to bottom, and an interlayer 231 is arranged on the outside of the curved casing 23, and the interlayer 231 is pearl cotton or polyurethane. Concrete or cast metal materials are poured into the cavity of the curved shell 23 . The lower side of the metal cover 22 is provided with a first jack 25 and a second jack 26 from top to bottom, and the first jack 25 and the second jack 26 are respectively connecte...

Embodiment 3

[0050] A post-mounted concrete pile head fracture method that is convenient for lowering, such as image 3 shown, including the following steps,

[0051] A. The upper end of the reinforcement cage 1 is covered with a wrapping layer 11, and the wrapping layer 11 is an insulating medium such as pearl cotton or polyurethane. Place the reinforcement cage 1 again, and pour concrete;

[0052] B. After the concrete solidifies and reaches the initial strength (generally above 10 MPa), lower the breaking device 2;

[0053] The breaking device 2 includes a metal cover 22 and a curved casing 23 arranged from top to bottom, and an interlayer 231 is arranged on the outside of the curved casing 23, and the interlayer 231 is an insulating medium such as pearl cotton or polyurethane. Concrete or cast metal materials are poured into the cavity of the curved shell 23 . The lower side of the metal cover 22 is provided with a first jack 25 and a second jack 26 from top to bottom, and the first...

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Abstract

The invention relates to the technical field of pile foundations, and discloses a rear-mounted concrete pile head fracturing method capable of achieving convenient lowering. The method comprises the following steps that S1, a steel reinforcement cage (1) is designed, steel bars and a detecting pipe at the upper end of the steel reinforcement cage are elevated to the standard height, and the steelreinforcement cage is sleeved with a wrapping layer (11); S2, after concrete pouring is finished, before solidification, a fracturing device (2) is lowered, and a metal cover (22) is lowered to a pre-fracturing surface (3); S3, after the concrete is solidified to reach the initial strength (generally 10 MPa or above), a first jack (25) is pressurized to enable the concrete at the layer of the metal cover (22) to be fractured; S4, after a foundation pit is excavated, the first jack (25) is started again, and the concrete on the upper side of the metal cover (22) is hoisted away; and S5, a second jack (26) is started to enable the fracturing device (2) to be separated from the pile foundation concrete. The first jack firstly generates pressure on the pre-fracturing surface to fracture the concrete. The first jack generates upward pressure on the metal cover so as to facilitate the hoisting of the fractured concrete; and the construction difficulty of workers for prying the upper-side concrete on the pre-fracturing surface is simplified, and the working condition time is shortened.

Description

technical field [0001] The invention relates to the technical field of pile foundation bored pile construction, in particular to a post-mounted concrete pile head fracture method that is convenient for lowering. Background technique [0002] When the pile holes are poured, the concrete on the uppermost layer will carry a large amount of slag or impurities. In order to prevent the slag or impurities from affecting the concrete structure strength of the poured pile foundation, it is necessary to pour a certain height of concrete at the top of the pile foundation design height. And after excavation of the foundation pit, chisel away the over-poured concrete. In the prior art, the pile top concrete is usually manually chiseled out, which is time-consuming and labor-intensive, and generates dust and noise pollution, which affects the occupational health and safety of workers, increases the safety risk of the project, and restricts the progress of the project. Contents of the i...

Claims

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Application Information

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IPC IPC(8): E02D9/00E02D5/34
CPCE02D9/005E02D5/34E02D2300/0026E02D2300/002
Inventor 徐胜祥邵一鸣丁富军高楠楠邓会元黄玉良林广东刘庆洋邓祖华陈善波骆鹏程贾晓峰徐普恩
Owner 徐胜祥