Construction method of slip-casting variable-cross section steel pipe pile and expansion and extrusion device of slip-casting variable-cross section steel pipe pile

A technology of grouting device and steel pipe pile, which is applied in the direction of sheet pile wall, foundation structure engineering, construction, etc. It can solve the problems of uncontrollable grout flow path, grout running, and poor reliability, so as to increase reliability and increase the bite effect , to avoid the effect of running pulp

Inactive Publication Date: 2014-12-17
上海市建工设计研究总院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pile side post-grouting technology also has shortcomings, that is, the flow path of the grout cannot be controlled, the phenomenon of grout running is prone to occur, and the reliability is relatively poor

Method used

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  • Construction method of slip-casting variable-cross section steel pipe pile and expansion and extrusion device of slip-casting variable-cross section steel pipe pile
  • Construction method of slip-casting variable-cross section steel pipe pile and expansion and extrusion device of slip-casting variable-cross section steel pipe pile
  • Construction method of slip-casting variable-cross section steel pipe pile and expansion and extrusion device of slip-casting variable-cross section steel pipe pile

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Such as figure 1 and figure 2 As shown, the embodiment of the present invention provides an expansion and extrusion device, which includes at least one expansion and extrusion unit arranged on the side of the variable-section steel pipe pile and a grouting device 2 arranged at the top of the variable-section steel pipe pile 1 , the expansion and extrusion unit is bound and fixed to the variable-section steel pipe pile 1, and the grouting device 2 is connected to the variable-section steel pipe pile 1 or the expansion and extrusion unit.

[0042]Further, the bottom of the variable-section steel pipe pile 1 is provided with a pile point, and the pile point faces away from the side of the variable-section steel pipe pile 1, and the setting of the pile point is convenient for the variable-section steel pipe pile. Pile 1 is piled down, and the depth of the pile is increased, and those skilled in the art can easily implement its scheme according to the description of the ab...

Embodiment 2

[0053] The difference between this embodiment and Embodiment 1 is that: image 3 and Figure 4 As shown, in this embodiment, the number of the expansion and extrusion units matches the number of bamboo nodes of the variable cross-section steel pipe pile 1, and the expansion and extrusion units are all geotextile bags 3, and the plurality of geotextile bags 3 are set on the surrounding side of the variable-section steel pipe pile 1 close to the soil layer with higher bearing capacity, and the upper and lower ends of the geotextile bag 3 are bound and fixed to the variable-section steel pipe pile 1 through steel wire ropes 4. The bag bodies of each geotextile bag 3 are respectively tightened to the peripheral sides of the variable-section steel pipe pile 1 through elastic bands 5, and there are several openings on the peripheral side of the variable-section steel pipe pile 1 corresponding to the position of the geotextile bag 3. hole 6, the grouting device 2 is connected to the...

Embodiment 3

[0064] The difference between this embodiment and the previous two embodiments is that: Figure 5 and Figure 6 As shown, the number of the expansion and extrusion unit is one, and the expansion and extrusion unit is a geotextile bag 3, and the geotextile bag 3 is wound on the pile side of the variable-section steel pipe pile 1, and is spirally distributed on the variable-section steel pipe pile 1. The entire pile body of the steel pipe pile 1, the geotextile bag 3 is bound and fixed to the variable section steel pipe pile 1, the grouting device 2 and the geotextile bag 3 are located at the top of the variable section steel pipe pile 1 One end connection, through this design, the grouting device 2 can grout the geotextile bag 3 without pre-embedding, and the geotextile bag 3 is spirally wound on the variable cross-section steel pipe pile 1, and the geotextile bag 3 is When the grout is stretched, it can fill the gap very well and increase the pullout force of the variable cro...

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Abstract

The invention provides a construction method of a slip-casting variable-cross section steel pipe pile and an expansion and extrusion device of the slip-casting variable-cross section steel pipe pile. According to the construction method of the slip-casting variable-cross section steel pipe pile and the expansion and the extrusion device of the slip-casting variable-cross section steel pipe pile, provided by the invention, hole forming is firstly carried out by utilizing a drilling machine, slurry in a drill hole can be replaced by utilizing cement slurry after the hole forming is completed, a steel pipe pile which is provided with the expansion and extrusion device is then put in the drill hole, high-pressure cement slurry is pressed into the steel pipe pile or the expansion and extrusion device after the cement slurry in the drill hole is solidified, the expansion and extrusion device is used for expanding to extrude and strengthen a surrounding soil body under the action of the high-pressure cement slurry, a cement slurry body expansion and extrusion head is finally formed around the steel pipe pile, thus the occlusion action between the steel pipe pile and the surrounding soil body is greatly increased, a slurry leakage phenomenon which is easily caused in a post-grouting technology is avoided, and the operation reliability of the expansion and extrusion device is increased.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a construction method of a variable-section steel pipe pile formed by grouting and an expansion and extrusion device thereof. Background technique [0002] An uplift pile is a pile foundation that bears a tensile load. From the perspective of fully utilizing the mechanical properties of materials, steel pipe piles should be the most efficient uplift piles. However, due to the constraints of traditional construction techniques, the advantages of steel pipe piles as uplift piles cannot be fully reflected. On the one hand, steel pipe piles are constructed by driving or pressing in, which has a great impact on the environment; on the other hand, the occlusion between steel pipe piles and soil is relatively weak, especially in eastern soft soil areas such as Shanghai. So the post-grouting technology of steel pipe piles came into being. [0003] The existing post-grouting techno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/44E02D5/48
Inventor 胡玉银陈建兰栗新阳吉宝谷远朋
Owner 上海市建工设计研究总院有限公司
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