Spiral high-pressure jetting wing-enlarged stirring bottom-expanded stiff composite pile, construction method thereof and drilling machine

A composite pile and screw technology, applied in sheet pile wall, foundation structure engineering, construction and other directions, can solve the problems of insufficient bearing capacity of pile foundation and high pile layout density, and achieve the improvement of pile bearing capacity, increase of pile end resistance, The effect of reducing the layout density

Pending Publication Date: 2018-11-02
中航旭日(北京)岩土工程技术有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to provide a helical high-spray-spreading-wing-stirring composite pile with bottom-expanding strength, its construction method and drilling rig, which can solve the problem of insufficient bearing capacity of pile foundations, high pile layout density, and potential quality and safety hazards in the prior art. technical problem

Method used

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  • Spiral high-pressure jetting wing-enlarged stirring bottom-expanded stiff composite pile, construction method thereof and drilling machine
  • Spiral high-pressure jetting wing-enlarged stirring bottom-expanded stiff composite pile, construction method thereof and drilling machine
  • Spiral high-pressure jetting wing-enlarged stirring bottom-expanded stiff composite pile, construction method thereof and drilling machine

Examples

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Effect test

Embodiment 1

[0053] Please also refer to Figure 1 to Figure 6 .

[0054] Such as figure 1 As shown, the spiral high-spraying-spreading-wing-stirring and bottom-expanding composite pile provided in this embodiment includes an outer pile body 11, an inner core pile 12 and an expansion base 13, the lower end of the outer pile body 11 is combined with the expansion base 13, and the inner core The lower end of the pile 12 is equipped with a prefabricated pile tip 14 , and the inner core pile 12 and the prefabricated pile tip 14 are pressed and implanted into the outer pile body 11 . By installing the prefabricated pile point 14 at the lower end of the inner core pile 12, it is convenient to penetrate the inner core pile 12 into the outer pile body 11 during actual construction. The expansion base 13 includes a peripheral portion 131 made of cement and soil and a central portion 132 made of concrete, and the central portion 132 accounts for 80%-90% of the volume of the entire expansion base 1...

Embodiment 2

[0062] see Figure 7 .

[0063] The difference from Example 1 is that the outer pile body 11 of the spiral high-spray-spreading wing-stirring and bottom-expanding stiff composite pile provided in this embodiment is provided with three diameter-expanding pile body parts 111, and the diameter-expanding pile body parts 111 expand outwards. , by changing the diameter, the contact area between the entire composite pile and the surrounding soil is increased, the side friction resistance is improved, and the settlement of the pile is reduced.

Embodiment 3

[0065] Please also refer to Figure 8 to Figure 15 .

[0066] The difference from Example 1 is that the inner core pile 12 of the spiral high-sprayed wing-stirred and bottom-expanded stiff composite pile provided in this example can also be Figure 8 Polygonal reinforced concrete prefabricated solid core piles in Figure 9 Polygonal reinforced concrete prefabricated hollow core piles in Figure 10 cast-in-place reinforced concrete core piles, Figure 11 The finished pipe piles in Figure 12 The finished solid square pile in Figure 13 The finished hollow square pile core pile, Figure 14 Concrete-filled steel pipe piles in or Figure 15 The H-shaped steel piles in.

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Abstract

The invention discloses a spiral high-pressure jetting wing-enlarged stirring bottom-expanded stiff composite pile, a construction method thereof and a drilling machine. According to the stiff composite pile, the construction method thereof and the drilling machine, the technical problems of relatively low bearing capacity, high cost, certain quality defects and the like of an existing stiff composite pile are solved. The spiral high-pressure jetting wing-enlarged stirring bottom-expanded stiff composite pile comprises an outer pile body, an inner core pile body and a bottom-expanded base, wherein the outer pile body, the inner core pile body and the bottom-expanded base are combined into a whole, the strength composite pile further comprises a prefabricated pile tip installed at the lowerend of the inner core pile body, and the inner core pile body and the prefabricated pile tip are planted into the center of the outer pile body. According to the stiff composite pile, the construction method thereof and the drilling machine, firstly, the outer pile body is subjected to high-pressure grouting injection to carry out first-stage extrusion and compaction on pile periphery soil, whenguncreting is carried out on center concrete through the bottom-expanded base, second-stage extrusion and compaction are carried out on the outer pile body, third-stage extrusion and compaction are carried out on the outer pile body in the process of planting the inner core pile body, and the outer pile body which are formed through the three stages of extrusion and compaction is extruded and compacted with the surrounding soil layer, and the resistance of the side of the pile is greatly improved; and secondly, the three stages of extrusion and compaction are carried out on the bottom-expandedconcrete through high-pressure grouting bottom expanding, concrete guncreting bottom expanding and the prefabricated pile tip, so that the resistance of a pile end is further improved.

Description

technical field [0001] The invention relates to the technical field of pile foundation construction in civil engineering, in particular to a helical high-spray, wing-spreading, stirring and bottom-expanding strength composite pile, a construction method thereof and a drilling rig. Background technique [0002] Stiff composite pile is a pile type composed of cement-soil mixing pile and reinforced concrete prefabricated pile. It is widely used in civil engineering fields such as construction engineering, bridge engineering, and water conservancy engineering. It is used as a pile foundation and support pile for building foundations. [0003] Compared with cement-soil piles, stiff composite piles have the advantages of strong bearing capacity and less pile use. This is mainly because the cement-soil piles themselves are not strong enough and require more use to increase the overall bearing capacity of the pile foundation. For example, for the existing For some cement-soil piles,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/46E02D5/44E02D5/50E02D5/62
CPCE02D5/44E02D5/46E02D5/50E02D5/62E02D2250/0023E02D2250/0038
Inventor 胡明欣郜宝田蒋林峰胡海滨翟大鹏胡明顺翟胜乾
Owner 中航旭日(北京)岩土工程技术有限公司
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