CN219343214U - Spiral soil nail - Google Patents
Spiral soil nail Download PDFInfo
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- CN219343214U CN219343214U CN202223374669.6U CN202223374669U CN219343214U CN 219343214 U CN219343214 U CN 219343214U CN 202223374669 U CN202223374669 U CN 202223374669U CN 219343214 U CN219343214 U CN 219343214U
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Abstract
The utility model provides a spiral soil nail which comprises a spiral nail rod, wherein straight nail rods are arranged at two ends of the spiral nail rod, and the center axis of each straight nail rod is overlapped with the rotation axis of the spiral nail rod. The utility model has the advantages of increased contact area with the slurry, high anchoring strength with soil body and strong tensile resistance.
Description
Technical Field
The utility model relates to the technical field of building construction, in particular to a spiral soil nail.
Background
The construction process of the soil nail support is that a slope is excavated on a foundation pit, mechanical holes are drilled on the slope, soil nails are placed in the holes, grouting is carried out, reinforcing steel bars and a net are bound on the slope, concrete with the thickness of 80mm-100mm is sprayed, soil bodies, the reinforcing steel bars and the net are combined with the sprayed concrete surface, the next working surface is excavated, and the steps are repeated, so that the deep foundation pit is formed. The soil nails are used as main stress members for supporting the side slope, are usually made of straight steel bars or steel pipes, and are combined with slurry after grouting through soil nail holes, and the slurry is combined with soil body so as to anchor the soil nails.
However, the contact area between the normal straight soil nails and the slurry is limited, the normal straight soil nails cannot be completely centered in the holes, the anchoring strength with the soil is low, the tensile resistance is not strong, and the stability of the soil nailing wall is insufficient.
Disclosure of Invention
In view of the above problems, the present utility model aims to provide a spiral soil nail, which has the advantages of increased contact area with slurry, high anchoring strength with soil body and strong tensile resistance.
The spiral soil nail comprises a spiral nail rod, wherein straight nail rods are arranged at two ends of the spiral nail rod, and the center axis of each straight nail rod is overlapped with the rotation axis of the spiral nail rod.
The screw nail pole is spiral steel pipe, straight nail pole is straight steel pipe spiral steel pipe with evenly be provided with the slip casting hole on the straight steel pipe respectively.
The length of the screw rod is not smaller than that of the straight rod.
An intermediate nail rod is connected between the two straight nail rods.
And reinforcing rods are uniformly connected between the inner side of the spiral nail rod and the middle nail rod along the spiral direction of the spiral nail rod.
And inclined rods are uniformly arranged on the outer sides of the spiral screw rods along the spiral direction of the spiral screw rods, the included angles between the inclined rods and the middle screw rods are larger than 30 degrees and smaller than 60 degrees, and the end parts of the inclined rods are propped against the inner walls of the soil screw holes.
The screw pitch of the screw rod is 0.3m-0.5m.
The screw rod and the straight rod comprise steel bars.
As can be seen from the above description, the spiral soil nail provided by the utility model has the spiral nail rod, the contact area between the spiral nail rod and slurry can be increased, compared with the straight nail rod, the spiral soil nail has the advantages of stronger anchoring, stronger tensile resistance and enhanced soil nailing wall stability.
Drawings
Other objects and results of the present utility model will become more apparent and readily appreciated by reference to the following description and claims in conjunction with the accompanying drawings and a more complete understanding of the utility model.
In the drawings:
FIG. 1 is a schematic view showing the structure of a spiral soil nail according to embodiment 1 of the present utility model;
FIG. 2 is a schematic structural view of a spiral soil nail according to embodiment 2 of the present utility model;
wherein, 1-spiral nail pole, 2-straight nail pole, 3-diagonal bar, 4-middle nail pole, 5-reinforcing rod.
The same reference numerals will be used throughout the drawings to refer to similar or corresponding features or functions.
Detailed Description
The utility model is capable of various modifications and embodiments, and particular embodiments are illustrated in the drawings and described herein. However, the present utility model is not limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and technical scope of the present utility model.
Specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.
Example 1
FIG. 1 is a schematic view showing the structure of a spiral soil nail according to embodiment 1 of the present utility model;
as shown in fig. 1, the spiral soil nail provided by the embodiment can be used for soil nailing wall support.
The spiral soil nail comprises a spiral nail rod 1, wherein straight nail rods 2 are arranged at two ends of the spiral nail rod 1, and the center axis of each straight nail rod 2 coincides with the rotation axis of the spiral nail rod 1. The straight nail rod 2, the spiral nail rod 1 and the straight nail rod 2 are sequentially connected to form a spring-shaped soil nail, and the straight nail rod 2, the spiral nail rod 1 and the straight nail rod can be integrally formed or welded and connected. The spiral nail rod 1 in the middle part is in a spiral shape, the coiled solidification is in the slurry, the contact surface with the slurry is increased, the solidification is firm and stable, and the tensile resistance is strong. The straight nail rods 2 at the two ends facilitate the whole spiral soil nails to be inserted into the soil nail holes. Both the screw rod 1 and the straight rod 2 can be steel bars.
For anchoring more firmly, the screw rod 1 is a screw type steel pipe, the straight screw rod 2 is a straight steel pipe, and grouting holes are uniformly formed in the screw type steel pipe and the straight steel pipe respectively. The slurry enters the spiral steel pipe and the straight nail pipe from the grouting holes, so that slurry exists inside and outside the soil nails, and the soil nails are anchored in the soil nail holes more firmly by the slurry.
The length of the screw rod 1 is not less than the length of the straight rod 2. The screw rod 1 can be one third of the total length of the screw soil nail. The screw pitch of the screw rod 1 can be 0.3m-0.5m, and is as small as possible under the condition of facilitating screw processing, so that the contact surface of the screw rod 1 and slurry is increased, and the tensile strength is increased.
In order to enable the spiral soil nail to be located in the middle of a soil nail hole, a centering component can be further arranged on the spiral nail rod 1, inclined rods 3 are uniformly arranged on the outer side of the spiral nail rod 1 along the spiral direction of the spiral nail rod 1, the included angle between each inclined rod 3 and the middle nail rod 4 is larger than 30 degrees and smaller than 60 degrees, and the end portion of each inclined rod 3 abuts against the inner wall of the soil nail hole. The screw nail comprises a screw nail rod 1, wherein a plurality of inclined rods 3 are arranged on the periphery of the screw nail rod 1, the end part of each inclined rod 3 is propped against the inner wall of a soil nail hole, so that the rotating shaft of the screw nail rod 1 coincides with the central shaft of the soil nail hole, the whole screw soil nail is positioned in the middle of the soil nail hole, each part of the whole screw soil nail is convenient to fully contact with slurry, the anchoring is firm, and the stress of the screw soil nail is uniform.
The end of the inclined rod 3 faces the outer end of the soil nail hole, and after grouting, the inclined rod 3 can also be used as an inverted fork to enhance tensile resistance.
Example 2
FIG. 2 is a schematic structural view of a spiral soil nail according to embodiment 2 of the present utility model;
as shown in fig. 2, in the spiral soil nail provided in this embodiment, for the firmness of the spiral soil nail, an intermediate nail rod 4 is connected between two straight nail rods 2, and the intermediate nail rod 4 is located at the center of the spiral nail rod 1.
Reinforcing rods 5 are uniformly connected between the inner side of the screw rod 1 and the middle screw rod 4 along the screw direction of the screw rod 1. The reinforcing rod 5 connects the screw rod 1 and the middle screw rod 4 together, which is more beneficial to the stability of the screw rod 1 and further increases the anchoring firmness.
The helical soil nail according to the present utility model is described above by way of example with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that various modifications may be made to the helical soil nails set forth above without departing from the teachings of the present utility model. Accordingly, the scope of the utility model should be determined from the following claims.
Claims (7)
1. The spiral soil nail is characterized by comprising a spiral nail rod, wherein straight nail rods are arranged at two ends of the spiral nail rod, and the center axis of each straight nail rod is overlapped with the rotation axis of the spiral nail rod;
an intermediate nail rod is connected between the two straight nail rods.
2. The spiral soil nail of claim 1, wherein the spiral nail rod is a spiral steel pipe, the straight nail rod is a straight steel pipe, and grouting holes are uniformly formed in the spiral steel pipe and the straight steel pipe respectively.
3. The helical soil nail of claim 1, wherein the length of the helical shank is not less than the length of the straight shank.
4. The soil screw as claimed in claim 1, wherein reinforcing bars are uniformly connected between the inner side of the screw shaft and the middle screw shaft in a screw direction of the screw shaft.
5. The spiral soil nail according to claim 1, wherein inclined rods are uniformly arranged on the outer sides of the spiral nail rods along the spiral direction of the spiral nail rods, the included angle between each inclined rod and the middle nail rod is larger than 30 degrees and smaller than 60 degrees, and the end parts of the inclined rods are abutted against the inner walls of the soil nail holes.
6. The helical soil nail of claim 1, wherein the pitch of the screw shank is 0.3m to 0.5m.
7. The helical soil nail of claim 1, wherein the helical shank and the straight shank each comprise rebar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223374669.6U CN219343214U (en) | 2022-12-15 | 2022-12-15 | Spiral soil nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223374669.6U CN219343214U (en) | 2022-12-15 | 2022-12-15 | Spiral soil nail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219343214U true CN219343214U (en) | 2023-07-14 |
Family
ID=87108196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223374669.6U Active CN219343214U (en) | 2022-12-15 | 2022-12-15 | Spiral soil nail |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219343214U (en) |
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2022
- 2022-12-15 CN CN202223374669.6U patent/CN219343214U/en active Active
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