Treatment method of elevation-exceeding part of concrete pouring pile head

A treatment method and concrete technology, applied in sheet pile wall, construction, infrastructure engineering and other directions, can solve the problems of high labor intensity, damage to the main reinforcement bars, and inability to guarantee the quality of the project, and achieve the effect of ensuring the quality of pouring and easy treatment.

Inactive Publication Date: 2011-07-27
CHINA FIRST METALLURGICAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since the shoveling is carried out with a crusher or a pointed rock hammer (pneumatic pick) when the concrete pile reaches its strength, if there is a slight negligence during operation, cracks may occur at the pile head, and sometimes the excess steel bars may be damaged. The main reinforcement is damaged or deformed, resulting in the inability to guarantee the elevation and quality of the set poured concrete pile head, labor-intensive and time-consuming, and the quality of the project cannot be guaranteed

Method used

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  • Treatment method of elevation-exceeding part of concrete pouring pile head
  • Treatment method of elevation-exceeding part of concrete pouring pile head
  • Treatment method of elevation-exceeding part of concrete pouring pile head

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The method of processing the super-elevation part of the concrete pouring pile head, the steps:

[0021] 1) 2 minutes after the concrete pouring pipe was pulled out, insert the compressed air branch pipe 2 of the treatment device for the super-elevation part of the concrete pouring pile head into the concrete. The distance between the elevations is required to be calibrated at 100 mm, so the compressed air branch pipe 2 is inserted into the concrete without adjustment;

[0022] 2) Open the regulating valve 6 on the compressed gas branch pipe 2 and the regulating valve 5 on the compressed gas main pipe 1 of the treatment device for the super-elevation part of the concrete pouring pile head, so that the compressed gas with a pressure of 0.4Mpa passes through the compressed gas branch pipe 2 The bottom sprays out around;

[0023] 3) Three minutes after the surface layer of the poured concrete begins to appear grout bubbles, close the regulating valve 5 on the compressed g...

Embodiment 2

[0027] The method of processing the super-elevation part of the concrete pouring pile head, the steps:

[0028] 1) 4.5 minutes after the concrete pouring pipe was pulled out, insert the compressed air branch pipe 2 of the treatment device for the super-elevation part of the concrete pouring pile head into the concrete. The distance between elevations is required to be calibrated at 200 mm, so the compressed gas branch pipe 2 is inserted into the concrete without adjustment;

[0029] 2) Open the regulating valve 6 on the compressed gas branch pipe 2 and the regulating valve 5 on the compressed gas main pipe 1 of the treatment device for the super-elevation part of the concrete pouring pile head, so that the compressed gas with a pressure of 0.6Mpa passes through the compressed gas branch pipe 2 The bottom sprays out around;

[0030] 3) 4.5 minutes after grout bubbles appear on the surface of the poured concrete, close the regulating valve 5 on the compressed air main pipe 1 an...

Embodiment 3

[0034] The method of processing the super-elevation part of the concrete pouring pile head, the steps:

[0035] 1) 5 minutes after the concrete pouring pipe was pulled out, insert the compressed air branch pipe 2 of the treatment device for the super-elevation part of the concrete pouring pile head into the concrete. The distance between elevations is required to be calibrated at 300 mm, so the compressed gas branch pipe 2 is inserted into the concrete without adjustment;

[0036] 2) Open the regulating valve 6 on the compressed gas branch pipe 2 and the regulating valve 5 on the compressed gas main pipe 1 of the processing device for the super-elevation part of the concrete pouring pile head, so that the compressed gas with a pressure of 0.7Mpa passes through the compressed gas branch pipe 2 The bottom sprays out around;

[0037] 3) 6 minutes after the poured concrete surface begins to appear grout bubbles, close the regulating valve 5 on the compressed gas main pipe 1 and t...

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PUM

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Abstract

The invention relates to a treatment method of an elevation-exceeding part of a concrete pouring pile head. The method comprises the following steps of: within 10 minutes after a pouring pipe is pulled out, inserting a branch compressed gas pipe of a concrete pouring pile head treatment device into concrete and ensuring that a distance of 100-500 millimeters is reserved between the bottom end of the branch compressed gas pipe and a required elevation of the pouring pile head; successively opening a regulating valve and a master regulating valve of the concrete pouring pile head treatment device to ensure that the compressed gas is ejected out from the bottom of the branch compressed gas pipe; within 3-10 minutes after slurry bubbles appear on the surface layer of the concrete, successively closing the master regulating valve and the regulating valve and stopping inputting the compressed gas; pulling the branch compressed gas pipe out; and chipping off a set elevation part exceeding the pouring pile head. In the invention, materials in different proportions in the concrete material are separated in the presence of the action of gas by adopting the compressed gas so that the strength of a redundant concrete part is greatly reduced, thus the part is easy to treat, and the main reinforcing steel bar of the pouring pile head and the quality of the pile head concrete are not easy todamage.

Description

technical field [0001] The invention relates to underwater concrete pouring pile heads or wall tops such as bored piles or underground continuous walls, and in particular belongs to a method for treating the super-elevation part of the concrete pouring pile heads. Background technique [0002] At present, most of the cast-in-place pile heads after underwater pouring are mixed with floating grout and inferior mud on the pile heads. The existence of floating slurry and inferior mud will be very unfavorable to the quality of the cast-in-situ pile head, and will have great harm to the buildings to be built on the cast-in-situ pile head. For this reason, in order to ensure the quality of the cast-in-place pile head and the buildings built on it, the constructors take measures to exceed the set poured concrete pile head by about 0.5-1.0m. The part of the poured concrete pile head shall be removed, and the main reinforcement of the excess part shall be exposed. [0003] Since the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/64
Inventor 黎明中田国清
Owner CHINA FIRST METALLURGICAL GROUP
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