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A valve-type pile point for retaining soil in the outer pile and inner hole for phc pile set construction

A PHC pile and valve-type technology, which is applied in sheet pile walls, foundation structure engineering, construction, etc., can solve the problems of delaying the test period, laborious work, inconvenience, etc., and achieves the reduction of procedures, reduction of engineering costs, and convenient production Effect

Active Publication Date: 2019-03-15
MCC5 GROUP SHANGHAI CORPORATION LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this test plan, the 10-meter-deep soil in the outer pile must be pulled out, which is self-evidently labor-intensive and delays the test period
[0004] Therefore there are above-mentioned inconveniences and problems in the cover piling construction of the small pile in the known big pile inner hole

Method used

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  • A valve-type pile point for retaining soil in the outer pile and inner hole for phc pile set construction
  • A valve-type pile point for retaining soil in the outer pile and inner hole for phc pile set construction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The outer pile inner hole soil-retaining valve-type pile tip used for the PHC pile package construction of the present invention, the Ø600mm PHC inner pile 2 is set in the Ø1000mm PHC outer pile 1, and the inner wall of the PHC outer pile 1 is pre-embedded with a positioning guide ring 3, including PHC Outer stake and flap baffle 6.

[0025] see now figure 1 , figure 1 It is a schematic diagram of the structure of the valve-type pile tip for retaining soil in the outer pile and inner hole of the embodiment of the present invention when it is in use. As shown in the figure, four hinge pin sleeves 4 are equally welded on the circumference of the pre-embedded flange at the end of the pile head of the PHC outer pile 1, and the length of the hinge pin sleeves 4 is 50mm.

[0026] Provide 4 valve baffles 6 with the same diameter as the PHC outer pile 1, so that the 4 valve baffles can be assembled into the inner diameter size of the PHC outer pile 1, and the bottom of the va...

Embodiment 2

[0028] The manufacturing method of the soil-retaining valve type pile tip of the outer pile inner hole of the embodiment of the present invention:

[0029] The pile point of the Ø1000mm PHC outer pile 1 set for pile driving is designed as a valve pile point type. The pile point is made of 10mm thick steel plate, cut into a circle with a diameter of 820mm, and then equally divided into 4 petals, and each petal is embedded with the pile head. The welded hinge shaft is welded and allows each flap to open downward freely. A reinforcing rib is welded in the middle of each flap to prevent the flap from bending inward and soil from entering the pile hole when the pile is sunk. The rest of the embodiment of the present invention is the same as embodiment 1.

Embodiment 3

[0031] The method of using the valve-type pile tip for retaining soil in the outer pile and the inner hole of the embodiment of the present invention:

[0032] First drive in the Ø1000mm PHC outer pile 1 to reach the predetermined sinking depth to ensure that the soil does not enter the pile hole during construction, and then drive in the Ø600mm PHC inner pile to ensure that the construction of the PHC inner pile 2 can effectively open the valve and prevent sinking. When the pile is piled, the valve is bent inward, and the soil enters the pile hole. The positioning and guiding ring 3 in the pile hole of the PHC outer pile is a pre-embedded positioning and guiding ring in the inner hole wall of the outer pile, which plays a role of positioning and guiding when the inner pile is driven, so that the inner pile will not deviate, damage the outer pile, and ensure the alignment of the inner and outer piles. Concentricity. Thus, the soil-retaining valve-type pile tip of the outer pi...

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Abstract

The invention provides an outer pile inner hole soil retaining flapper-type pile tip used for prestressed concrete pipe (PHC) pile sleeving construction. An inner PHC pile (2) is sleeved with an outer PHC pile (1). A plurality of positioning and guiding rings (3) are pre-buried in the inner wall of the outer PHC pile (1) in a spaced mode. The outer pile inner hole soil retaining flapper-type pile tip comprises the outer PHC pile and flapper baffles (6). The outer pile inner hole soil retaining flapper-type pile tip is characterized in that four hinge pin sleeves (4) are uniformly welded to the periphery of a pre-buried flange at the end of the pile head of the outer PHC pile (1); the four flapper baffles (6) are arranged, wherein the diameter of the flapper baffles (6) is equal to that of the outer PHC pile (1), and the four flapper baffles can be spliced to meet the dimension requirement for the inner diameter of the outer PHC pile (1); and hinge pins (5) are welded and fixed to the bottom ends of the flapper baffles so that the flapper baffles can be matched with the hinge pin sleeves (4), and each flapper baffle (6) can be opened downwards freely. The flapper-type pile tip has the advantages that the structure is simple, manufacturing is convenient, the outer pile can enter an inner hole in a soilless mode in the pile sinking process, the internal soil digging procedure of the outer pile is omitted, the inner pile can be piled smoothly in a sleeved mode, and the working efficiency is improved.

Description

technical field [0001] The invention relates to a reinforced concrete pipe pile in a pile foundation project, in particular to a pile point with an outer pile and an inner hole retaining soil with a flap type used for the packaged construction of a PHC pile. Background technique [0002] PHC piles (reinforced concrete pipe piles) are the main method of foundation bearing of buildings and structures, and are widely used. The pile sinking method of PHC pile mainly adopts crawler pile driver to hammer the pile. In the test piles of the new coal yard silo project in the Baosteel plant area, the pile type of the small pile with the inner hole of the large pile is adopted. Usually, this type of pile is rarely used in pile foundation engineering. [0003] Baosteel will build a coal loading silo project in the coal storage yard, and build 30 concrete silos with a diameter of 24m, a height of 46m, and a wall thickness of 450mm in the E / F two storage yards. In the design stage of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/72E02D5/30
Inventor 徐建平李令许立李永慧
Owner MCC5 GROUP SHANGHAI CORPORATION LIMITED