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Forming construction method and auxiliary reinforcement device of long helical bored grouting pile

A technology of long auger drilling and reinforcement devices, which is applied in sheet pile walls, foundation structure engineering, construction, etc., and can solve problems such as reduced pile bearing capacity and impact on engineering construction

Active Publication Date: 2020-07-07
四川城凯特建设工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The long auger drilling rig pressure grouting pile-forming process is widely used due to its advantages of low construction noise, flexible equipment movement, fast pile-forming speed, no mud pollution, low cost, and strong adaptability to strata. Void soil often exists behind the hole, which reduces the bearing capacity of the final pile and affects subsequent engineering construction

Method used

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  • Forming construction method and auxiliary reinforcement device of long helical bored grouting pile
  • Forming construction method and auxiliary reinforcement device of long helical bored grouting pile
  • Forming construction method and auxiliary reinforcement device of long helical bored grouting pile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] An auxiliary reinforcement device for long auger bored grouting piles, such as figure 1 with image 3 As shown, it includes: a steel cage skeleton 1, and the steel cage skeleton 1 includes: a positioning steel ring 11 adapted to the pile hole, a support rib 12 fixedly assembled on the positioning steel ring 11, and being arranged at the bottom of the support rib 12 1. Pocket bottom steel bars 13 for transmitting the vibration force of the vibrating device; bearing on the positioning steel ring 11 and / or the supporting ribs 12, and being used to expand outward to the supporting ribs 12 and anchored on the wall of the pile hole; And, guided by the guide member 5 of the vibrating device, it is used to resist the pushing assembly 3 that the reinforcement assembly 2 expands outward during the descent process so that the reinforcement assembly 2 is anchored on the wall of the pile hole.

[0067] Specifically, such as figure 1 As shown, the positioning steel ring 11 and the ...

Embodiment 2

[0077] A construction method for forming long auger bored grouting piles, comprising:

[0078] Step 1: If Figure 4 As shown, the auxiliary reinforcement device described in Embodiment 1 is made according to the predetermined pile foundation size. The pile foundation size includes pile height and pile diameter. Usually, the diameter of the steel cage skeleton 1 is adapted to the pile diameter, and the length is adapted to the pile height;

[0079] Step 2: If Figure 5 As shown in the figure, use a long auger to drill holes according to the predetermined size of the pile foundation at the predetermined position;

[0080] Step 3: If Image 6 As shown, the drill bit of the long auger drilling rig is lifted upwards while pumping concrete into the formed pile hole, wherein the slump of the concrete is 180-220mm, and the strength grade is C20-C50;

[0081] Step 4: If Figure 7 As shown, after the concrete pouring in the pile hole is completed and before the initial setting of th...

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Abstract

The invention relates to a long spiral drilling pressure grouting pile forming construction method and an auxiliary reinforcing device thereof. The auxiliary reinforcing device comprises a steel reinforcement cage framework, reinforcing assemblies and a pushing assembly; the steel reinforcement cage framework comprises a positioning steel ring, a supporting rib strip and a bottom reinforcing steelbar; the reinforcing assemblies are borne on the positioning steel ring or the supporting rib strip, and the reinforcing assemblies are used for stretching out of the supporting rib strip and anchoring on the wall of the pile hole; and the pushing assembly is guided by a guide component of a vibration device, and the pushing assembly is used for abutting against the reinforcing assembly to be opened outwards in the descending process. According to the method and the device, after the concrete is injected into the pile hole, the steel reinforcement cage framework is vibrated and sunk into theconcrete through the vibration device, the pushing assembly is sunk into the concrete through the vibration device, and under the action of the vibration force, the pushing assembly pushes the reinforcing assembly to be opened outwards and anchored on the wall of the pile hole, so that the steel reinforcement cage framework is connected to the wall of the pile hole, the stability of the pile foundation in the pile hole is improved, and then the bearing capacity of the pile foundation is improved.

Description

technical field [0001] The invention relates to the technical field of building pile foundation construction, in particular to a construction method for forming a long auger bored grouting pile and an auxiliary reinforcement device thereof. Background technique [0002] The long auger drilled press-filled concrete pile is a press-filled concrete pile forming technology developed on the basis of the long auger dry drilling method. The conveying pump passes through the central channel of the drill pipe to press the concrete into the pile hole with a certain pressure. After the concrete is poured to the design elevation, the prefabricated steel cage is inserted into the concrete to the design elevation with the help of special vibration equipment. After the concrete solidifies, the Formed reinforced concrete piles. [0003] The long auger drilling rig pressure grouting pile forming process is widely used due to its advantages of low construction noise, flexible equipment movem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/34E02D15/04E02D5/74
CPCE02D5/34E02D5/74E02D15/04
Inventor 徐金良徐玉柱
Owner 四川城凯特建设工程有限公司