Stirring head of inner grouting and outer steel pipe pile
By separating the grouting pipe from the mixing drive shaft, with the outer large-diameter steel pipe serving as the mixing drive shaft and the inner grouting pipe, the problem of insufficient torque resistance and drilling capacity of existing mixing piles is solved, achieving high load-bearing capacity and deformation control of composite piles, which are suitable for foundation treatment projects.
Patent Information
- Application Number
- CN202423075884.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-13
AI Technical Summary
The existing grouting pipes for mixing piles have small diameters, weak torque resistance, and limited drilling capacity, resulting in insufficient flexibility and load-bearing capacity of the mixing piles.
The grouting pipe and the mixing drive shaft are set separately. The large-diameter steel pipe on the outside serves as the mixing drive shaft, while the grouting pipe is set inside. This enhances the torque and drilling capacity of the mixing pile, forming a composite pile foundation of rigid core pile and flexible pile.
It significantly improves the torsional resistance and drilling capacity of mixing piles, enhances the bearing capacity and deformation control capacity of composite piles, and is suitable for various foundation treatment projects.
Smart Images
Figure CN223577082U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to pile foundation technical field, concretely relates to a mixing head of internal grouting and external steel pipe pile. BACKGROUND
[0002] The mixing head of the existing mixing pile is connected with the grouting pipe, the grouting pipe has small diameter and weak torque resistance, the drilling capacity is limited, and the formed mixing pile is a flexible pile with limited bearing capacity. SUMMARY
[0003] The utility model discloses a kind of mixing heads of internal grouting and external steel pipe pile, grouting pipe and mixing pile transmission shaft are separately arranged, large diameter steel pipe is used as mixing transmission shaft outside, large diameter steel pipe head is mixing pile head, grouting pipe is placed in steel pipe, the torque of mixing pile is greatly increased, and the drilling capacity of mixing pile is greatly increased.
[0004] The utility model discloses a kind of mixing heads of internal grouting and external steel pipe pile, grouting pipe and mixing pile transmission shaft are separately arranged, large diameter steel pipe is used as mixing transmission shaft outside, large diameter steel pipe head is mixing pile head, grouting pipe is placed in steel pipe, the torque of mixing pile is greatly increased, and the drilling capacity of mixing pile is greatly increased.
[0005] A kind of mixing head of internal grouting and external steel pipe pile, it is characterized by including steel pipe section, the top of the steel pipe section is the connecting portion of steel pipe, a group of stirring blades are arranged outside the steel pipe section, the bottom of the steel pipe section is provided with conical portion, another group of stirring blades are arranged on the conical portion, grouting pipe is arranged in the inside of the steel pipe section, the grouting pipe includes vertical section vertically arranged in the steel pipe section and horizontal section arranged above the group of stirring blades of the conical portion, and the vertical section is communicated with the horizontal section.
[0006] The vertical section of the grouting pipe is connected with the horizontal section by joint.
[0007] Horizontal extension length of the horizontal section does not exceed the extension length of corresponding stirring blade.
[0008] Two groups of stirring blades are vertically arranged.
[0009] The utility model has the advantages that: stirring blade is used on the outer steel pipe wall, grouting pipe is in steel pipe, the torsional resistance of mixing pile is greatly improved, the drilling capacity of mixing pile is greatly strengthened, steel pipe and mixing head are left in composite pile as core pile, the bearing capacity and deformation control capacity of composite pile are greatly improved, and the utility model can be widely applied in various foundation treatment projects, and has wide application prospect. BRIEF DESCRIPTION OF DRAWINGS
[0010] Figure 1 Construction procedure of the utility model Figure I ;
[0011] Figure 2 Construction procedure of the utility modelFigure II ;
[0012] Figure 3 is a construction process of the utility model Figure III ;
[0013] Figure 4 is a structure schematic diagram after the construction of the utility model. DETAILED DESCRIPTION
[0014] The utility model features and other related features are further described in detail below by examples with reference to the drawings, so as to facilitate the understanding of the same industry technical personnel:
[0015] As shown in Figures 1-4 , the reference numerals 1-8 in the drawing represent steel pipe section 1, grouting pipe 2, stirring blade 3, transverse grouting pipe 4, steel pipe joint 5, steel pipe 6, cement-soil of mixing pile 7, and cementing material 8 respectively.
[0016] Example: combined with Figures 1 to 3 shown in the embodiment, the drilling capacity improving mixing head main body comprises steel pipe section 1, the upper part of the steel pipe section 1 is provided with steel pipe joint 5, the steel pipe section 1 can be installed to the bottom of the steel pipe 6 through the steel pipe joint 5, that is, the mixing head is installed to the bottom position of the steel pipe 6.
[0017] Two groups of stirring blades 3 are arranged on the periphery of the steel pipe section 1, one group of stirring blades 3 is directly arranged on the outer wall of the steel pipe section 1, and the other group of stirring blades 3 is arranged on the conical part arranged at the bottom of the steel pipe section 1; the two groups of stirring blades 3 are vertically arranged to improve the stirring effect, especially the stirring uniformity. When the steel pipe section 1 rotates under the driving, the stirring blades 3 cut and stir the soil. In the embodiment, the conical part extends from the bottommost position of the steel pipe section 1, which facilitates the soil penetration of the steel pipe section 1.
[0018] A grouting pipe is arranged in the steel pipe section 1, the grouting pipe comprises two parts, one is the grouting pipe 2 vertically arranged in the steel pipe section 1, and the other is the transverse grouting pipe 4 horizontally penetrating from the conical part at the bottom of the steel pipe section 1, the transverse grouting pipe 4 and the grouting pipe 2 are in communication. When the steel pipe section 1 is connected with the steel pipe 6 through the steel pipe joint 5, the grouting pipe 2 is also connected with the grouting pipe arranged in the steel pipe 6 and forms communication, so that the grouting is smoothly realized, and the torque of the mixing pile is greatly increased, and the drilling capacity of the mixing pile is greatly increased.
[0019] In the embodiment, the transverse grouting pipe 4 is arranged above the stirring blades 3 at the conical part, and the horizontal extension length of the transverse grouting pipe 4 does not exceed the extension length of the set of stirring blades 3, so that during the drilling process, the set of stirring blades 3 can protect the transverse grouting pipe 4 to a certain extent, that is, the place reached by the transverse grouting pipe 4 is the soil body that has been cut and stirred, thus ensuring that the transverse grouting pipe 4 is not damaged by the pressure of the harder soil body.
[0020] In the construction of the embodiment, the following construction steps are included:
[0021] 1) The stirring head is manufactured and connected with the steel pipe 6 through the steel pipe joint 5, and the grouting pipe 2 is connected with the grouting pipe arranged in the steel pipe 6.
[0022] 2) The steel pipe 6 is rotated by the upper power device, and the steel pipe 6 synchronously drives the stirring head to rotate through the steel pipe joint 5, the stirring blades 3 around the steel pipe 6 cut and stir the soil body, the grouting pipe 2 in the steel pipe injects grouting into the transverse grouting pipe 4, the stirring and grouting are simultaneously performed, and the cement soil 7 of the stirring pile around the pile is formed.
[0023] 3) The cementing material 8 such as concrete, mortar and cement slurry is poured into the steel pipe 6, and the rigid core pile is formed, and the rigid core pile and the stirring pile with the flexible pile around the stirring pile form the rigid-flexible composite pile foundation.
[0024] After the completion, the stirring head remains in the cement soil 7 of the stirring pile, and plays the role of reinforcing the bottom of the pile foundation, and especially the stirring blades serve as the transverse reinforcement, which can improve the bearing capacity of the composite pile foundation.
[0025] Although the above embodiment has been described in detail with reference to the drawings for the purpose of the concept and embodiment of the utility model, those skilled in the art can realize that various improvements and changes can be made to the utility model without departing from the scope defined by the claims, and therefore, the details are not described here.
Claims
1. A mixing head for internal grouting and external steel pipe piles, characterized in that: The device includes a steel pipe section, the top of which is a connecting part of the steel pipe. A set of stirring blades is provided on the outside of the steel pipe section, and a conical part is provided at the bottom of the steel pipe section. Another set of stirring blades is provided on the conical part. A grouting pipe is provided inside the steel pipe section. The grouting pipe includes a vertical section arranged vertically inside the steel pipe section and a horizontal section arranged above the set of stirring blades on the conical part. The vertical section and the horizontal section are connected.
2. The mixing head for internal grouting and external steel pipe piles according to claim 1, characterized in that: The vertical section and the horizontal section of the grouting pipe are connected by a joint.
3. The mixing head for internal grouting and external steel pipe piles according to claim 1, characterized in that: The horizontal extension length of the horizontal segment does not exceed the extension length of the corresponding stirring blade.
4. The mixing head for internal grouting and external steel pipe piles according to claim 1, characterized in that: The two sets of stirring blades are arranged perpendicularly to each other.