Construction technique for self-leading hole at pile tip of embrace press type PHC tubular pile to enter rock through static pressure

A PHC pipe pile and construction technology technology, applied in sheet pile wall, foundation structure engineering, construction, etc., can solve the problems of pollution, difficult to penetrate the pile end, change the piling method, etc., to achieve good penetration effect, high work efficiency, The effect of low construction cost

Inactive Publication Date: 2007-02-21
刘小檀 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hammer pile driving has a long construction period, vibration, pollution, unstable pile driving process, noise, and does not meet environmental protection requirements; static pressure pile driving requires large-scale professional rock-entry equipment
The tight fit pile pressure force between the pile clamp and the pile feeder of the traditional static hydraulic pile driver generally does not exceed 550 tons. When encountering a hard ground, it is difficult to statically press into the rock. The problem of piling cost
[0003] During the application of static pressure pile sinking, it is difficult for the pile tip to penetrate the gravel sand layer to reach the strongly weathered rock layer
When the load-bearing layer at the pile tip is selected in the gravel sand layer, the resistance at the pile tip is generally large when the pile is pressed, but the bearing capacity of the pipe pile in the static load test is much smaller than that of the pile when the pile is sunk, and the value of the bearing capacity of

Method used

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  • Construction technique for self-leading hole at pile tip of embrace press type PHC tubular pile to enter rock through static pressure
  • Construction technique for self-leading hole at pile tip of embrace press type PHC tubular pile to enter rock through static pressure
  • Construction technique for self-leading hole at pile tip of embrace press type PHC tubular pile to enter rock through static pressure

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0017] Example 1 is shown in Figure 1-6:

[0018] A kind of construction equipment for static pressure into the rock by the self-introduction hole of the pile end of the holding pressure type PHC pipe pile, the hydraulic control pile gripper (11) clamping pile feeder (12) of the conventional full hydraulic static pile driver (20) , The latter is sleeved and fixed on the outer wall of the hollow-core pipe pile and the steel plate at the top of the pile end; in the conventional full hydraulic static pile driver (20), the hydraulic control pile clamp (11) and the pile feeder (12) An annular anti-skid hoop (10) is added between.

[0019] The present invention follows the application number 200610052169.7 "Grouting self-introduction PHC pipe pile tip anti-rust cap construction device and construction technology" in the invention patent part of the equipment for high-pressure water and gas grouting. One end of the high-pressure water hose (8) penetrates the cavity of the hollow pipe pil...

Example Embodiment

[0020] Example 2: A self-guided static pressure rock-into-rock construction process at the end of the holding-pressure PHC pipe pile:

[0021] ①Add an annular anti-skid hoop (10) between the hydraulically controlled pile gripper (11) and the pile feeder (12) of the conventional full hydraulic static pile driver (20) to connect the pile gripper and the pile feeder The maximum tight-fitting pile pressing force is increased from 550 tons of the traditional static hydraulic pile driver to 600-1200 tons, which can make it not easy to slip when the pile is sent, and it is easier to statically press into the rock. The layer does not need to change the piling method immediately, and it can continue to send the piles into the gravel sand layer by static pressure to a depth of less than 2m; beyond this depth, the conventional dry static pressure sending of the piles into the rock is powerless, and the holding pressure PHC pipe pile is adopted. The construction technology of static pressure ...

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Abstract

The present invention relates to a construction process capable of utilizing high pressure to make the pile tip of PHC pipe pile self-hole and enter into rock. It is characterized by that it utilizes high-pressure water flow and high pressure air flow to impact and pulverize solid gravel stratum positioned in the front end of pile tip. Said invention also provides the concrete method and steps for implementing said construction process.

Description

technical field [0001] The invention relates to a construction method of building foundation piles, in particular to a construction technology of pressure-embracing PHC pipe piles with self-guiding holes for static pressure entry into rocks. Background technique [0002] A large number of foundation piles are used in the development of tall buildings. However, PHC pipe piles are produced industrially, the quality is intuitive, and the quality of the pile-forming process is easy to guarantee. Compared with other concrete pouring piles, it has the advantages of low cost, short construction period, and environmental protection. It has become the development direction of construction piles. At present, there are mainly two types of pile sinking techniques: hammering type and static pressure type. Hammering pile driving has a long construction period, vibration, pollution, unstable pile driving process, noise, and does not meet environmental protection requirements; static press...

Claims

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Application Information

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IPC IPC(8): E02D7/26E02D7/20E02D7/24
Inventor 刘小檀钱勇江守慈
Owner 刘小檀
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