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PHC pile-based multiple high jet pedestal pile construction method

A technology of PHC piles and construction methods, which is applied in the direction of foundation structure engineering, sheet pile walls, buildings, etc., can solve the problems of limited application, limited strength, and insufficient strength of itself, and achieve obvious economic benefits and improve strength

Inactive Publication Date: 2011-04-13
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the strength of the multi-pipe high-pressure rotary grouting pile itself is limited, and it is often damaged due to insufficient strength, so the application is limited

Method used

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  • PHC pile-based multiple high jet pedestal pile construction method
  • PHC pile-based multiple high jet pedestal pile construction method
  • PHC pile-based multiple high jet pedestal pile construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] Such as Figure 1 to Figure 6 As shown, a construction method of multiple high sprayed bottom piles based on PHC piles, the main technical steps are as follows:

[0039] (1) Static pressure PHC pile 1 to the design depth. The construction technology of PHC pile 1 is relatively mature, especially with the new type of static pile pressing machine put into use, the static pressure construction method without noise, vibration and oil fume, etc., has developed rapidly.

[0040] (2) The multiple high-pressure jet-jet drill pipes 5 are drilled to the soil layer at the bottom of the PHC pile 1 . After the PHC pile 1 is constructed, the multiple high-pressure rotary jet drilling rigs are in place, and the multiple drill pipes 5 are drilled through the hollow part of the PHC pile 1 to the soil layer at the bottom of the PHC pile.

[0041] (3) Enlarging the construction of the head cavity 6 . The multiple drill pipes 5 reciprocate impact and suction up and down in the soil laye...

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Abstract

The invention discloses a prestressed high-strength concrete (PHC) pile-based multiple high jet pedestal pile construction method, which comprises the following steps of: statically pressing a PHC pile to the designed depth of a soil layer, drilling to the depth below the bottom of the PHC pile through the hollow part of the PHC pile by a multiple high-pressure spiral jet drill rod, performing multiple tube construction at the bottom of the PHC pile to form an enlarged head cavity greater than the diameter of the PHC pile and in accordance with the design requirement, and then filling the enlarged head cavity to form an enlarged head. The method has obvious economic benefit; and compared with other pile types acquiring the same bearing capacity, the PHC pile-based multiple high jet pedestal pile has obvious economic advantage.

Description

technical field [0001] The invention relates to a construction method of a pile foundation, in particular to a construction method of a multiple-high spray-expanded bottom pile based on PHC piles. Background technique [0002] With the development of modern economy and the progress of society, the scale of buildings has been continuously expanded, and the depth of foundation treatment has also been continuously increased. As a deep foundation, the adoption rate of pile foundation has also been continuously increased. According to incomplete statistics, the annual consumption of piles in my country is more than several million or even more, and pile foundation projects account for 20%-30% of the cost of general civil engineering, and the proportion of foundation treatment in soft soil areas is even higher. Soft soil is widely distributed in my country, and there are many complex soft soil foundations in coastal areas such as the Bohai Bay, the Yellow River Delta, the Yangtze ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/44
Inventor 任连伟刘希亮李建委王光勇王欣
Owner HENAN POLYTECHNIC UNIV
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