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Drilling construction method for dry rock-socketed bored pile

A construction method and drilling pile technology, which are applied in drilling equipment and methods, sheet pile walls, drilling equipment, etc., to achieve the effects of low drilling risk, easy quality assurance, and reduction of repeated impact of drilling rigs on drilling slag.

Inactive Publication Date: 2012-11-07
CHINA GEZHOUBA GROUP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies in manual hole-digging construction and conventional drilling construction technology, and provide a drilling construction method for dry-placed rock-socketed bored piles

Method used

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  • Drilling construction method for dry rock-socketed bored pile

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Embodiment Construction

[0019] As shown in the figure, a drilling method for dry-placed rock-socketed bored piles includes the following steps:

[0020] 1. Guide pile digging construction. The manual excavation pile construction method is adopted, and the construction depth of the guide pile shall be determined according to the geological conditions. Generally, the depth of the guide pile is not less than 2 meters, and the complete bedrock embedded is not less than 2 meters.

[0021] 2. The drilling rig is in place. Use a percussion drill for drilling. Determine the weight of the drill bit according to the diameter of the pile, pour 10cm thick concrete within 1 meter of the front of the drilling rig and level off the installation area of ​​the drilling rig, and install the drilling rig after the concrete reaches 7 days of age. shaking.

[0022] 3. Slurry drilling

[0023] Drilling slurry is used to put clay into the hole in stages, inject water into the hole at the same time, and start the drilli...

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Abstract

The invention discloses a drilling construction method for a dry rock-socketed bored pile, which comprises the following steps: firstly, using a manual hole-digging construction guide pile to increase the concentration of slurry to impact drilling for a rock-socketed pile under the guide pile, cleaning the slurry and drilled slag in holes by using a slug pulling cylinder in each cycle, then circularly adding soil into the holes for slurrying and drilling till the drilled holes reach the designed depth, and pulling out the slurry slag after the drilling is finished so as to pour concrete into the drilled holes as a hole digging pile in the air environment. The method can reduce repeated impact drilling of a drilling machine, improves the construction efficiency by 2 to 3 times, improves the construction speed by more than 2 times of manual hole digging, meanwhile reduces the concrete pouring amount caused by over digging of the hole pile, simplifies the construction process, improves the construction quality, and greatly reduces the cost.

Description

[technical field] [0001] The invention relates to a drilling construction method of a dry-placed rock-socketed bored pile. [Background technique] [0002] Conventional rock-socketed pile foundation construction in dry places is constructed by manual excavation, and in a few cases, conventional bored piles are also used for construction. The construction of artificial excavated piles has the disadvantages of slow progress, poor safety and large amount of over-excavation and backfilling. The blasting operation in the artificial excavation pile operation will also have a certain adverse effect on the stability of the bedrock. The construction of bored piles generally adopts positive circulation of mud to discharge the ballast, and the mud pump is used to transport the mud to the bottom of the hole, and the ballast at the bottom of the hole is taken out by the buoyancy and flow of the mud. During construction, due to the low specific gravity of the mud (note: if the specific g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B7/00E02D5/22
Inventor 付俊雄吕芝林朱峰彭元平齐涛孙向楠
Owner CHINA GEZHOUBA GROUP CO LTD