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System for grouting pile side sealing and pile tip extrusion grouting of cast-in-place pile and construction method thereof

A technology of grouting system and cast-in-situ pile, which is applied in the direction of sheet pile wall, foundation structure engineering, building, etc., can solve the problems of large discreteness, low reliability of foundation pile bearing capacity, poor controllability of post-grouting technology, etc. Achieve the effects of increasing pile side resistance, increasing single pile bearing capacity, and increasing strength

Pending Publication Date: 2022-04-15
浙江坤德创新岩土工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the quality controllability of the traditional post-grouting technology is poor, and it cannot effectively control the flow direction of the injected grout and the spread of the grout, so that the reliability of the increase in the bearing capacity of the foundation pile is low and the dispersion is large.

Method used

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  • System for grouting pile side sealing and pile tip extrusion grouting of cast-in-place pile and construction method thereof
  • System for grouting pile side sealing and pile tip extrusion grouting of cast-in-place pile and construction method thereof
  • System for grouting pile side sealing and pile tip extrusion grouting of cast-in-place pile and construction method thereof

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Experimental program
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Effect test

Embodiment 1

[0051] Below in conjunction with embodiment and attached Figure 1-9 The present invention is further elaborated, and this embodiment is a bored cast-in-place pile, the pile length is 30m, the pile diameter is 600mm, and the outer diameter of the reinforcement cage 13 is 500mm.

[0052] Using the pile side grouting and pile end extrusion grouting system for cast-in-place piles of the present invention, a grouting bag 5 surrounds and wraps the steel cage 13, and the upper and lower ends of the grouting bag 5 are connected to the steel bar through the fixing buckle 15. The cage 13 is fixed together, the vertical grouting pipe 14 on the pile side is bound together with the reinforcement cage 13, and goes up to the ground to connect with the outlet end of the high-pressure grouting pump 12 on the pile side, and the lower end of the vertical grouting pipe 14 on the pile side The opening communicates with the inner cavity of the grouting bladder 5, and the junction joint is sealed a...

Embodiment 2

[0059] Embodiment 2 is another implementation of the pile side grouting device and pile end extrusion grouting device of the present invention, as attached Figure 6 , Figure 9 and Figure 10 As shown, this embodiment adopts the same foundation pile design parameters as that of Embodiment 1, and this embodiment will not repeatedly describe the components similar to Embodiment 1. The difference between this embodiment and embodiment 1 is that, as attached Figure 6 As shown, the grouting pouch 5 is in the shape of a circular cylinder, and the sewing method is to sew the annular outer layer cloth 9 and the inner layer cloth 10 first, and then sew the upper and lower ends of the outer layer cloth 9 and the inner layer cloth 10 , forming a sealed grouting bag 5 . as attached Figure 9 and Figure 10 As shown, in this embodiment, the pile end extrusion device 4 selects four independent extrusion units 19, which is beneficial to fill the jacking section with grouting at the bo...

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Abstract

The invention relates to a cast-in-place pile side slurry sealing and pile end extrusion grouting system and a construction method thereof.The cast-in-place pile side slurry sealing and pile end extrusion grouting system comprises a pile side slurry sealing device and a pile end extrusion grouting device, and the pile side slurry sealing device is arranged on the outer side face of a reinforcement cage of a cast-in-place pile; the upper end face of the pile end extrusion grouting device is fixedly connected with the bottom end of the reinforcement cage, the lower end face of the pile end extrusion grouting device abuts against pile bottom sediment in the sinking process of the reinforcement cage, and the pile bottom sediment is axially and downwards pushed, compacted and compacted through the pile end extrusion grouting device; the pile side slurry sealing device forms a pile side slurry sealing section on the outer side of the reinforcement cage after slurry jacking, high-pressure grouting is conducted on the pile end of the cast-in-place pile and the pile side range below the pile side slurry sealing section through the pile end extrusion grouting device, and grouting reinforcing layers are formed on the pile bottom face and the pile side face. The method has the advantages that the construction process is simple, the flowing direction and the diffusion range of grout injected into the pile end and the pile side can be quantitatively and controllably controlled, then the single-pile bearing capacity of the cast-in-place pile can be greatly improved, and the settlement amount of a foundation pile is reduced.

Description

technical field [0001] The invention belongs to the technical field of pile foundation engineering, and in particular relates to a pile side grouting system and a pile end extrusion grouting system for cast-in-situ piles and a construction method thereof. Background technique [0002] Due to the advantages of simple and efficient construction and low cost, reinforced concrete piles have been widely used as the foundation of various infrastructures such as high-rise buildings, traffic engineering, and municipal engineering. However, during the construction of cast-in-situ piles, the quality of hole cleaning is often difficult to guarantee, and it is always inevitable to form a certain thickness of sediment virtual soil at the bottom of the pile, which leads to problems such as a reduction in the bearing capacity of a single pile of cast-in-place piles and excessive settlement, causing More engineering quality and safety issues. [0003] In order to solve the technical proble...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/34E02D15/04
Inventor 刘钟何鹏鹏张楚福吕美东
Owner 浙江坤德创新岩土工程有限公司
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