CN213596965U

CN213596965U - Prefabricated reinforced concrete soil nailing pile

Info

Publication number: CN213596965U
Application number: CN202022410601.3U
Authority: CN
Inventors: 张建智; 刘海啸
Original assignee: Research Institute of Coal Geophysical Exploration of China National Administration of Coal Geology
Current assignee: Research Institute of Coal Geophysical Exploration of China National Administration of Coal Geology
Priority date: 2020-10-27
Filing date: 2020-10-27
Publication date: 2021-07-02
Anticipated expiration: 2030-10-27

Abstract

A prefabricated reinforced concrete soil nailing pile comprises a spiral pile body, wherein the spiral pile body comprises a reinforcement cage and high-strength concrete, the spiral pile body is formed by pouring high-strength concrete after the reinforcement cage is installed in a mould, and a spiral body is arranged on the peripheral surface of the outer side of the spiral pile body; wherein, above-mentioned steel reinforcement cage includes a plurality of reinforcing bars and a plurality of stirrup, a plurality of reinforcing bars with direction parallel arrangement, and the center of a plurality of reinforcing bars links to each other in proper order and forms the polygon, and a plurality of stirrups set up along the axial direction interval of reinforcing bar, cramp a plurality of reinforcing bars. This prefabricated reinforced concrete soil nail pile adopts the modularization of reinforced high strength concrete to make, can guarantee the quality of pile body, has better tensile, anti-shear performance, and the pile body is implanted and is adopted the drilling guide, and the rotatory drilling of afterburning has improved the efficiency of construction.

Description

Prefabricated reinforced concrete soil nailing pile

Technical Field

The utility model relates to a civil engineering's technical field especially relates to a prefabricated reinforced concrete soil nail stake.

Background

At present, the reinforcement process of the soil nailing wall comprises the following three types, namely drilling and grouting: firstly, drilling holes in soil bodies by using mechanical equipment such as a drilling machine and the like, placing a rod body (generally made of HRB400 ribbed steel bars) after the holes are formed, and then injecting cement paste along the whole length, wherein the drilling and grouting nail is almost suitable for various soil layers, has higher pulling resistance, more reliable quality and lower manufacturing cost and is the most common soil nail type; secondly, directly punching into the mould: steel pipes, angle steels and other section steels, steel bars, moso bamboos, round timbers and the like are directly driven into the soil body without grouting. Thirdly, injecting grouting: the steel flower tube grouting soil nail has the advantages of direct nail driving and higher pulling resistance, is particularly suitable for soft soil layers such as silt, mucky soil and the like with difficult hole forming, various filling soils and sandy soils, and has wider application.

From the above, the existing three types of soil nailing wall reinforcement processes have the following technical defects: 1. the drilling and grouting type is adopted, the pile body forming is not easy to control, and the intestinal tract breaking pile is easy to form; 2. direct driving-in type: the driven-in soil nail has small diameter, low bonding friction resistance with soil body, low bearing capacity and limited nail length, so the driven-in soil nail is densely arranged and can be driven by machines such as manpower or vibration impact drills, hydraulic hammers and the like. The soil nail is directly driven into the soil without drilling in advance, the disturbance to the in-situ soil is small, but the soil nail is difficult to be driven into the hard cohesive soil and is not suitable for permanent supporting projects with service life longer than 2 years, the construction cost is slightly high when the rod body is made of metal materials, and the domestic application is very small; 3. injecting into a grouting type: the cost is slightly higher than that of the drilling and grouting soil nail, and the corrosion resistance is poor, so that the method is not suitable for permanent engineering.

SUMMERY OF THE UTILITY MODEL

The utility model provides a prefabricated reinforced concrete soil nailing pile has solved the technical problem that exists among the above-mentioned prior art, and this prefabricated reinforced concrete soil nailing pile that adds adopts the modularization of muscle high strength concrete to make, can guarantee the quality of pile body, has better tensile, anti-shear performance, and the pile body is implanted and is adopted the drilling guide, and afterburning rotary drilling has improved the efficiency of construction.

In order to achieve the above object, the present invention provides the following technical solutions:

a prefabricated reinforced concrete soil nailing pile comprises a spiral pile body, wherein the spiral pile body comprises a reinforcement cage and high-strength concrete, the high-strength concrete is poured after the reinforcement cage is installed in a mould to form the spiral pile body, and spiral bodies are arranged on the peripheral surface of the outer side of the spiral pile body; the steel reinforcement cage includes a plurality of reinforcing bars and a plurality of stirrup, a plurality of reinforcing bars are with direction parallel arrangement, just the center of a plurality of reinforcing bars links to each other in proper order and forms the polygon, a plurality of stirrups are followed the axial direction interval of reinforcing bar sets up, cramps a plurality of reinforcing bars.

Furthermore, the reinforcement cage includes four reinforcing bars and a plurality of stirrup, every the stirrup is the square, four reinforcing bars are fixed respectively every four bights of stirrup, a plurality of stirrups cramp four reinforcing bars.

Further, the spiral pile body comprises a circular section.

Further, the reinforcing steel bar is HRB335 deformed steel bar.

Further, the lower end of the spiral pile body optionally comprises an integrally formed pile tip, and the diameter of the pile tip is gradually reduced towards the direction far away from the lower end.

Further, the top end of the spiral pile body or the integrally formed pile head is used for being connected with a drilling machine.

Further, the top of spiral pile body perhaps still includes the pile head, the pile head pass through the cuff with spiral pile body fixed connection, the pile head is used for being connected with the rig.

The utility model has the advantages that:

the utility model provides a prefabricated reinforced concrete soil nail pile, it includes the spiral pile body, the spiral pile body includes steel reinforcement cage and high-strength concrete, wherein, the steel reinforcement cage includes a plurality of reinforcing bars and a plurality of stirrup, a plurality of reinforcing bars equidirectional parallel arrangement, and the center of a plurality of reinforcing bars links to each other in proper order and forms the polygon, a plurality of stirrups along the axial direction interval setting of reinforcing bar, cramp a plurality of reinforcing bars; and after the reinforcement cage is installed in the mold, pouring the high-strength concrete to form the spiral pile body, wherein the peripheral surface of the outer side of the spiral pile body is provided with a spiral body. According to the technical characteristics, the prefabricated reinforced concrete soil nail pile is manufactured in a reinforced high-strength concrete module mode, the quality of a pile body can be guaranteed, and the pile body has good tensile and shear resistance; the structural design of the spiral pile body is convenient for the rotary drilling of the prefabricated reinforced concrete soil nail pile, the pile body is implanted by adopting drilling guide and stress application rotary drilling, and the construction efficiency is improved.

Drawings

FIG. 1 is a schematic structural view of a prefabricated reinforced concrete soil nailing pile in the embodiment of the utility model;

fig. 2 is a perspective view of a reinforcement cage according to an embodiment of the present invention;

FIG. 3 is an end view of a reinforcement cage according to an embodiment of the present invention;

fig. 4 is a schematic structural view of an external pile head in an embodiment of the present invention;

FIG. 5 is a schematic structural view of a prefabricated reinforced concrete soil nailing pile for lengthening connection in an embodiment of the present invention;

fig. 6 is a schematic structural view of a pile body connecting member according to an embodiment of the present invention.

In the figure, 10-spiral pile body, 11-spiral body, 12-reinforcement cage, 121-reinforcement, 122-stirrup, 13-pile tip, 20-pile head, 201-reinforcement jack, 21-hoop and 30-pile body connecting piece

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-6, fig. 1 is the embodiment of the utility model provides an in the embodiment of the prefabricated structure schematic diagram that adds reinforced concrete soil nailing stake, fig. 2 is the embodiment of the utility model provides an in the structural perspective view of steel reinforcement cage, fig. 3 is the embodiment of the utility model provides an in the embodiment of the terminal surface diagram of steel reinforcement cage, fig. 4 is the embodiment of the utility model provides an in the embodiment of the structure schematic diagram of external pile head, fig. 5 is the embodiment of the utility model provides an in the embodiment of the prefabricated structure schematic diagram that adds reinforced concrete soil nailing stake that is used for adding the long connection, fig. 6 is.

The utility model provides a prefabricated reinforced concrete soil nailing pile belongs to civil engineering's technical field, and this prefabricated reinforced concrete soil nailing pile adopts the modularization of muscle high strength concrete to make, can guarantee the quality of pile body, has better tensile, anti-shear performance, and the pile body is implanted and is adopted the drilling guide, and afterburning rotary drilling has improved the efficiency of construction.

Specifically, referring to fig. 1 to 6, the precast reinforced concrete soil nailing pile comprises a spiral pile body 10, wherein the spiral pile body 10 shown in fig. 1 comprises a reinforcement cage 12 and high-strength concrete, the spiral pile body 10 comprises a circular cross section, a spiral body is arranged on the outer peripheral surface of the spiral pile body 10, preferably, the spiral diameter is 120mm, the spiral depth is 20mm, and the spiral pile body 10 is structurally designed to facilitate the rotary drilling of the precast reinforced concrete soil nailing pile; with continued reference to the reinforcement cage 12 shown in fig. 2, the reinforcement cage 12 includes a plurality of reinforcements 121 and a plurality of stirrups 122, the plurality of reinforcements 121 are arranged in parallel in the same direction, centers of the plurality of reinforcements 121 are connected in sequence to form a polygon, and the plurality of stirrups 122 are arranged at intervals along an axial direction of the reinforcements 121 to clamp the plurality of reinforcements 121. Specifically, adopt a plurality of stirrups 122 to cramp reinforcing bar 121 and form steel reinforcement cage 12, scribble the separant in the mould, install above-mentioned steel reinforcement cage 12 in the mould again, pour the high-strength concrete toward the mould in, the vibrations are closely knit, adopt again to form spiral pile body 10 after natural curing.

In this embodiment, preferably, referring to fig. 2 specifically, the reinforcement cage 12 includes four reinforcements 121 and a plurality of stirrups 122, each stirrup 122 is a square stirrup, the four reinforcements 121 are respectively fixed at four corners of each stirrup 122, the plurality of stirrups 122 hoop the four reinforcements 121, and then a welding machine is used to weld and form the reinforcement cage 12 with different size requirements.

In the embodiment, the prefabricated reinforced concrete soil nail pile is manufactured in a reinforced high-strength concrete module mode, the quality of the spiral pile body 10 can be guaranteed, and the pile has good tensile and shear resistance; the spiral pile body 10 is structurally designed to facilitate rotary drilling of the prefabricated reinforced concrete soil nail pile, the spiral pile body 10 is implanted by adopting drilling guide and stress application rotary drilling, and the construction efficiency is improved.

In this embodiment, preferably, the steel bar 121 is HRB335 deformed steel bar, and the tensile and compressive design strength of the HRB 335-grade steel bar is 300MPa, so that the axial tensile value of the spiral pile body 10 formed after pouring the high-strength concrete is greater than 300kM, and the spiral pile body has a certain shear resistance function. In addition, the thickness of the steel bar protective layer formed by pouring the high-strength concrete is 10-20 mm, and the tensile and compressive properties of the spiral pile body 10 are further ensured.

In this embodiment, referring to fig. 2 in particular, the lower end of the spiral pile body 10 preferably further includes an integrally formed pile tip 13, and the diameter of the pile tip 13 gradually decreases towards the direction away from the lower end, and the pile tip is pointed, so as to facilitate the rotary drilling of the precast reinforced concrete soil nailing pile and improve the construction efficiency.

In this embodiment, preferably, the top end of the spiral pile body 10 further includes a pile head 20, the reinforcing steel bars 121 protruding from the top end of the spiral pile body 10 are inserted into the reinforcing steel bar insertion holes 201 formed in the pile head 20, and the pile head 20 is in transition or interference fit with the top end of the spiral pile body 10 through a coaxially arranged hoop 21 for fixed connection, and in addition, the pile head 20 is used for being inserted into the connection part of the drilling machine to achieve connection with the drilling machine, and the pile head 20 has high torsion resistance and impact resistance.

In some embodiments, the top end of the spiral pile body 10 may be provided with an integrally formed pile head (not shown) for inserting into a connection portion of a drilling machine to achieve connection with the drilling machine.

In other embodiments, the spiral pile 10 is not provided with the tip 13 at the lower end, and referring to fig. 5 in particular, a prefabricated reinforced concrete soil nailing pile for lengthening connection is provided, because some construction requires the length of the whole prefabricated reinforced concrete soil nailing pile to be longer, so that the prefabricated reinforced concrete soil nailing pile needs to be lengthened, two prefabricated reinforced concrete soil nailing piles are connected by welding corresponding reinforcing steel bars 121, and a pile body connecting member 30 as shown in fig. 6 is adopted for increasing the torque resistance at the joint after the two prefabricated reinforced concrete soil nailing piles are welded.

The above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, the present invention has been described in detail with reference to the preferred embodiments, and those skilled in the art should understand that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all the solutions should be covered in the scope of the claims of the present invention.

Claims

1. The utility model provides a prefabricated reinforced concrete soil nail stake which characterized in that:

the prefabricated reinforced concrete soil nailing pile comprises a spiral pile body, wherein the spiral pile body comprises a reinforcement cage and high-strength concrete, the high-strength concrete is poured after the reinforcement cage is installed in a mould to form the spiral pile body, and spiral bodies are arranged on the peripheral surface of the outer side of the spiral pile body;

the steel reinforcement cage includes a plurality of reinforcing bars and a plurality of stirrup, a plurality of reinforcing bars are with direction parallel arrangement, just the center of a plurality of reinforcing bars links to each other in proper order and forms the polygon, a plurality of stirrups are followed the axial direction interval of reinforcing bar sets up, cramps a plurality of reinforcing bars.

2. The precast reinforced concrete soil nailing pile of claim 1, wherein: the reinforcement cage includes four reinforcing bars and a plurality of stirrup, every the stirrup is the square, four reinforcing bars are fixed respectively every four bights of stirrup, a plurality of stirrup cramps four reinforcing bars.

3. The precast reinforced concrete soil nailing pile of claim 2, wherein: the spiral pile body comprises a circular cross section.

4. The precast reinforced concrete soil nailing pile of claim 3, wherein: the steel bar is HRB335 deformed steel bar.

5. The precast reinforced concrete soil nailing pile according to any one of claims 1 to 4, wherein: the lower end of the spiral pile body optionally comprises an integrally formed pile tip, and the diameter of the pile tip is gradually reduced towards the direction far away from the lower end.

6. The precast reinforced concrete soil nailing pile of claim 5, wherein: the top end of the spiral pile body or the integrally formed pile head is used for being connected with a drilling machine.

7. The precast reinforced concrete soil nailing pile of claim 5, wherein: the top end of the spiral pile body or the pile head is further included, the pile head is fixedly connected with the spiral pile body through a hoop, and the pile head is used for being connected with a drilling machine.