CN113638404A

CN113638404A - Detachable reinforcement cage and manufacturing method thereof

Info

Publication number: CN113638404A
Application number: CN202111202124.4A
Authority: CN
Inventors: 石健; 张钦喜; 张越胜
Original assignee: Sotec Beijing Geotechnical Technology Co ltd
Current assignee: Sotec Beijing Geotechnical Technology Co ltd
Priority date: 2021-10-15
Filing date: 2021-10-15
Publication date: 2021-11-12
Anticipated expiration: 2041-10-15
Also published as: CN113638404B

Abstract

The invention discloses a detachable reinforcement cage and a manufacturing method thereof. The detachable reinforcement cage comprises detachable reinforcements, a first support and a second support, wherein the detachable reinforcements extend along the direction of a pile hole and are provided with a first end positioned at the top and a second end positioned at the bottom; an anchor rib adjacent the second end and interconnected to the detachable rib by a connector; the sleeve is sleeved on the outer side of the detachable rib, the sleeve is mutually installed with the detachable rib through a nut at a position close to the first end, and is mutually installed with the detachable rib through the connecting piece at a position close to the second end; wherein the connector is arranged such that when the detachable rib is subjected to a downward pressing force, the detachable rib is caused to disengage from the connector and the anchoring rib, and is detachable from the sleeve.

Description

Detachable reinforcement cage and manufacturing method thereof

Technical Field

Embodiments of the present disclosure relate generally to the field of green building construction technology, and more particularly, to a detachable reinforcement cage and a method for manufacturing the same.

Background

In recent years, with the rapid development of cities, the development of urban underground spaces brings about excavation and support of large-scale foundation pit engineering. The foundation pit engineering is usually excavated by adopting a pile-anchor supporting structure system, the supporting structure has a temporary supporting function, and the function of the temporary supporting structure is immediately finished after a high-rise building foundation is built and backfilled with backfill soil, so that a reinforcement cage and a reinforced concrete slope protecting pile in the temporary supporting structure also lose the original functions, and a large amount of reinforcements in the reinforcement cage and the slope protecting pile also become construction waste and seriously affect the secondary development of an underground space.

The existing slope protection pile is characterized in that reinforcing steel bars are welded and bound to form a reinforcing cage, the reinforcing cage is integrally inserted into a pile hole filled with concrete, and the concrete wraps the reinforcing cage and is solidified to form the slope protection pile. After the foundation pit is excavated, the horizontal shear resistance of the slope protection pile is determined by the vertical rigidity of the slope protection pile, and the vertical rigidity is determined by the tensile force generated by the bending deformation of the slope protection pile caused by the soil side pressure of the slope protection of the vertical steel bar wrapped in the concrete. Therefore, the slope protection pile has no soil lateral pressure after the fertilizer groove is backfilled, the supporting function is finished, and the reinforcing steel bars of the reinforcement cage in the slope protection pile cannot be recovered.

Chinese patent CN108951613B discloses a recyclable reinforcement cage, but it has the following disadvantages: firstly, the steel reinforcement cage is fixed by adopting a structure of a lower flange plate 3 and a lower protective sleeve nut 4-2, so that when the steel reinforcement cage is inserted into a pile hole fully poured with concrete, the whole insertion process of the steel reinforcement cage is very slow due to the blocking effect of the lower flange plate 3, and the efficiency is very low; secondly, although a certain length is reserved at the lower end of the lower protective sleeve nut 4-2, the lower protective sleeve nut 4-2 is mainly used as a nut member, so that the length is limited, and the lower protective sleeve nuts 4-2 are parallel and dispersed with each other, so that the anchoring force between the lower protective sleeve nut and the concrete is very weak, and good anchoring between the bottom of the steel reinforcement cage and the concrete cannot be realized; thirdly, due to the adoption of the structure of the lower flange plate 3 and the lower protective sleeve nut 4-2, the longitudinal bar needs to be unscrewed or taken out of the isolation sleeve when being recovered, but because the reinforcement cage is often bent, twisted or deformed in the process of hoisting or inserting into a pile hole, if the operation mode of rotating or rotating the longitudinal bar is adopted, the longitudinal bar is difficult to be separated from the lower protective sleeve nut 4-2 in a rotating way, so that the recovery fails; fourth, stirrup and stiffening rib are fixed and are indulged the muscle outside at the steel reinforcement cage, fix outside indulging the muscle spacer with solid fixed ring, but this kind of structure is because of so reinforcing from indulging the muscle outside, consequently can make to indulge the muscle inwards warp for indulge the muscle and produce crooked, distortion or deformation, be not convenient for follow-up will indulge the muscle and twist off or take out from the spacer.

There is therefore a need for an improved cage of rebar with detachable reinforcement and method of making the same that addresses at least one of the above deficiencies in the prior art.

Disclosure of Invention

It is a primary object of embodiments of the present disclosure to provide an improved removable rebar cage and method of making the same that addresses at least one of the above problems in the prior art.

A first aspect of the present disclosure provides a removable muscle steel reinforcement cage, includes: a removable bar (1) extending in the direction of the pile hole and having a first end (11) at the top and a second end (12) at the bottom; an anchoring rib (2) adjacent to said second end (12) and interconnected to said detachable rib (1) by a connector (4); the sleeve (3) is sleeved on the outer side of the detachable rib (1), the sleeve (3) is mutually installed with the detachable rib (1) through a nut at a position close to the first end (11), and is mutually installed with the detachable rib (1) through the connecting piece (4) at a position close to the second end (12); wherein the connector (4) is arranged to enable the detachable rib (1) to be disconnected from the connector (4) and the anchoring rib (2) and to be detached from the sleeve (3) when the detachable rib (1) is subjected to a downward pressing force.

According to some embodiments of the present disclosure, the connector (4) comprises a self-discharging nut (41) and a counter force sleeve (42); when the self-discharging nut (41) receives downward pressing force, the self-discharging nut can rotate around the axis of the detachable rib (1) anticlockwise in the reaction sleeve (42).

According to some embodiments of the present disclosure, the self-discharging nut (41) is rotatably sleeved in the reaction sleeve (42), and the second end (12) of the detachable rib (1) is rotatably sleeved in the self-discharging nut (41) through a thread.

According to some embodiments of the present disclosure, the self-discharging nut (41) is cylindrical and provided with four cylindrical studs (411); the ear nails (411) are uniformly arranged on the outer cylindrical surface of the self-discharging nut (41) in a spiral shape.

According to some embodiments of the present disclosure, the self-discharging nut (41) is provided with a threaded through hole (412) along an axis, the through hole (412) being rotatably connectable with the second end (12) of the detachable tendon (1).

According to some embodiments of the present disclosure, the reaction sleeve (42) is hollow cylindrical, and the inner wall (421) thereof is provided with a spiral groove (422) which is matched with the ear stud (411).

According to some embodiments of the present disclosure, one end of the counter sleeve (42) is interconnected with the anchoring rib (2) and the other end is sealed with the sleeve (3).

According to some embodiments of the present disclosure, a center line pitch of the spiral groove (422) is equal to a pitch formed by the ear stud (411) in a spiral shape.

According to some embodiments of the disclosure, when the self-discharging nut (41) is pressed downwards, the lug nail (411) is subjected to a circumferential counter-torsion force of the spiral groove (422) to drive the self-discharging nut (41) to rotate around the axis of the detachable rib (1) anticlockwise.

According to some embodiments of the present disclosure, further comprising an annular frame rib (6) supporting the casing (3) from an inner direction.

According to some embodiments of the present disclosure, the frame stud (6) is welded with a casing clamp (7) at a contact point position with the casing (3); the sleeve clamps (7) are uniformly distributed on the frame studs (6) and are used for inserting and fixing the sleeve (3).

According to some embodiments of the present disclosure, further comprising a stirrup (8) wound on the sleeve (3) from an external direction.

According to some embodiments of the present disclosure, the stirrup (8) is tightened with a burning wire at the contact point with the casing (3).

According to some embodiments of the present disclosure, the anchoring rib (2) is tapered overall.

A second aspect of the disclosure provides a method of manufacturing a split-bar reinforcement cage, which after manufacture forms a split-bar reinforcement cage (10) according to the first aspect of the disclosure.

According to some embodiments of the present disclosure, the method for manufacturing the detachable reinforcement cage comprises: welding a sleeve clamp (7) on an annular frame rib (6), then inserting the sleeve (3) provided with the detachable rib (1) into the sleeve clamp (7), and clamping the sleeve clamp (7) on the sleeve (3).

According to some embodiments of the present disclosure, the method for manufacturing the detachable reinforcement cage further comprises: interconnecting the second end (12) of the detachable rib (1) with the connecting piece (4) and sealing the sleeve (3) with the connecting piece (4) against each other.

According to some embodiments of the present disclosure, the method for manufacturing a removable reinforcement cage further includes: and connecting the anchoring ribs (2) to the connecting pieces (4).

According to some embodiments of the present disclosure, the method for manufacturing a removable reinforcement cage further includes: and winding the stirrup (8) on the sleeve (3) from the external direction, and tightly binding the contact point position of the stirrup (8) and the sleeve (3) by using a burning wire.

Drawings

In order to more clearly illustrate the technical solutions of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of a removable rebar cage according to an embodiment of the disclosure.

Fig. 2 is a schematic view of a partial structure of a removable rebar cage according to an embodiment of the disclosure.

Fig. 3 is a schematic view of a partial structure of a removable rebar cage according to an embodiment of the disclosure.

Fig. 4 is a schematic structural diagram of a self-discharging nut according to an embodiment of the disclosure.

FIG. 5 is a schematic view of a reaction sleeve configuration according to one example of an embodiment of the present disclosure.

Fig. 6 is a schematic view of the self-discharging nut and the reaction sleeve in fig. 5 according to the embodiment of the present disclosure.

FIG. 7 is a schematic view of another example reaction sleeve and the like according to an embodiment of the disclosure.

FIG. 8 is a schematic view of a cross-sectional configuration of the reaction sleeve of FIG. 7.

Fig. 9 is a schematic view of the self-discharging nut and the reaction sleeve in fig. 7 according to the embodiment of the present disclosure.

Detailed Description

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

Example 1: detachable reinforcement cage

As shown in fig. 1-3, an exemplary embodiment of the present disclosure provides a removable rebar cage 10, comprising: detachable ribs 1, anchoring ribs 2 and sleeves 3.

Referring to fig. 1, the removable bar 1 extends in the direction of the pile hole (e.g. parallel) and has a first end 11 at the top and a second end 12 at the bottom.

With continued reference to fig. 1, adjacent to the second end 12 is an anchoring rib 2, the anchoring rib 2 being interconnected (e.g. detachably connected) to the detachable rib 1 by a connector 4.

As shown in fig. 1, the sleeve 3 is sleeved on the outer side of the detachable rib 1, the sleeve 3 is mutually mounted with the detachable rib 1 through a nut at a position close to the first end 11 (for example, the sleeve 3 and the detachable rib 1 are mutually fastened through the nut), and is mutually mounted with the detachable rib 1 through the connecting piece 4 at a position close to the second end 12 (for example, the sleeve 3 and the detachable rib 1 are mutually fastened through the connecting piece 4).

Wherein the connector 4 is configured to allow the detachable rib 1 to be disconnected from the connector 4 and the anchor rib 2 and to be detached from the sleeve 3 when the detachable rib 1 is pressed downward (for example, by pressing in a direction in which a pile hole is downward).

It should be appreciated that the split-bar reinforcement cage of the present disclosure has the following advantages: firstly, can realize dismantling and retrieving detachable muscle 1, because can dismantle muscle 1 accounts for 85% of steel reinforcement cage weight usually, consequently can dismantle the recovery of muscle 1 and have significant, both can the reutilization, again can be great degree reduce building carbon emission, have environmental protection and economic value very much. Secondly, because the design of anchor muscle 2 has been adopted to the bottom, consequently given up the structure of chinese patent CN 108951613B's lower flange 3, can make the steel reinforcement cage when inserting the stake hole of pouring the concrete at this moment, do not have the hindrance effect of lower flange 3 for the whole insertion process of steel reinforcement cage is very smooth and easy, and efficiency is higher. And thirdly, the anchoring rib 2 is designed as an independent part, the length of the anchoring rib can be adjusted and set at will, so that the defect that the anchoring force between the lower protective sleeve nut 4-2 and the concrete in the Chinese patent CN108951613B is very weak is overcome, and on the contrary, after the anchoring rib 2 is inserted into a pile hole, the anchoring rib can be bonded and cured with the concrete to form a pile bottom anchoring end of the detachable rib prestress slope protection pile, so that the anchoring force between the pile bottom anchoring end and the concrete is stronger. Again, the present disclosure may achieve the detachment of the detachable rib 1 from the connection with the connector 4 and the anchoring rib 2 by applying a downward pressing force on the detachable rib 1, and may be detached from the sleeve 3. The detachable rib 1 can be still detached to realize recovery under the condition that the reinforcement cage is bent, twisted or deformed in the process of hoisting or inserting into a pile hole, so that the defect that recovery cannot be realized under the condition by adopting an operation mode of rotating or rotating the longitudinal rib is overcome.

According to some embodiments of the present disclosure, the removable rebar cage 10 may be substantially cylindrical, which is more suitable for use in the field of construction of slope protection piles; or may be substantially square or rectangular (not shown in the drawings of this disclosure), which is more suitable for use in the field of diaphragm wall construction.

According to some embodiments of the present disclosure, the anchoring rib 2 may have a certain length and be provided in plurality, parallel to each other (substantially cylindrical, e.g., cylindrical).

Preferably, the anchoring rib 2 as a whole may preferably be tapered (e.g. conical or square tapered), i.e. a plurality of anchoring ribs 2 will cause the bottom inside the steel reinforcement cage to taper as a whole. It can be understood that the design of the tapered anchoring rib 2 is particularly suitable for use in situations where the anchoring rib is inserted into a pile hole filled with concrete (i.e. the concrete is poured into the pile hole first, and then the reinforcement cage is inserted, i.e. "inverted reinforcement cage"). It can further avoid the hindrance defect of lower flange 3 among chinese patent CN108951613B and the defect that the anchoring force between lower protective sheath nut 4-2 and the concrete is very weak, on the contrary, be conical anchoring muscle 2 can make the steel reinforcement cage when inserting the stake hole of pouring the concrete fully, do not have the hindrance effect of lower flange 3 to because the toper is more suitable for conveniently inserting in the stake hole that has the concrete, consequently can further make the whole insertion process of steel reinforcement cage more smooth and easy, efficiency further improves. In addition, after the anchoring rib 2 is inserted into the pile hole, the anchoring rib can be bonded and cured with concrete more optimally to form a pile bottom anchoring end of the detachable rib prestressed slope protection pile, and the anchoring force between the pile bottom anchoring end and the concrete is further enhanced.

As shown in fig. 1-3, the split-bar reinforcement cage 10 further includes annular stand bars 6 that support the sleeve 3 from an interior direction, according to some embodiments of the present disclosure. According to some embodiments of the present disclosure, the casing clamp 7 is welded to the frame stud 6 at the contact point with the casing 3 (e.g., using a metal material to facilitate welding, such as iron or steel). The sleeve clamps 7 are evenly distributed over the frame studs 6 (for example, with a reasonable distribution spacing depending on the number of detachable studs 1) and serve to insert and fix the sleeve 3.

It will be appreciated that the mounting studs 6 of the present disclosure may support the sleeve 3 from an internal orientation, which may prevent the detachable stud 1 from deforming inwardly, and prevent the detachable stud 1 from bending, twisting or deforming, so as to facilitate subsequent removal of the detachable stud 1 from the sleeve 3.

According to some embodiments of the present disclosure, it further comprises a stirrup 8 wound on the sleeve 3 from the external direction. According to some embodiments of the present disclosure, the stirrup 8 is tightly bound with a burning wire (also called a binding wire, an annealing wire, which has good flexibility, can be made of high-quality iron wire, and is refined by using a national standard low-carbon steel wire through processes of acid pickling for rust removal, drawing for forming, high-temperature annealing, and the like) at the contact point with the sleeve 3.

It should be understood that the presently disclosed frame post 6 and stirrup 8 can simultaneously support the sleeve 3 from both the inside and outside directions, respectively, and at this time can further prevent the detachable rib 1 from deforming inwardly or outwardly, and better prevent the detachable rib 1 from bending, twisting or deforming, so as to facilitate subsequent removal of the detachable rib 1 from the sleeve 3.

As shown in fig. 4-9, the connector 4 includes a self-discharging nut 41 and a reaction sleeve 42, according to some embodiments of the present disclosure; when the self-discharging nut 41 receives a downward pressing force, it rotates counterclockwise around the axis of the detachable rib 1 inside the reaction sleeve 42 (for example, the self-discharging nut 41 can be separated from the detachable rib 1 inside the reaction sleeve 42 by rotating counterclockwise).

Referring to fig. 6 and 9, the self-discharging nut 41 is rotatably sleeved in the reaction sleeve 42, and the second end 12 of the detachable rib 1 is rotatably sleeved in the self-discharging nut 41 through a thread.

Referring to fig. 4, the dump nut 41 has a cylindrical shape and is provided with four cylindrical lugs 411; the ear studs 411 are uniformly arranged on the outer cylindrical surface of the self-discharging nut 41 in a spiral shape. According to some embodiments of the present disclosure, the self-discharging nut 41 is provided with a threaded through hole 412 along the axis, said through hole 412 being capable of rotatably connecting with said second end 12 of said detachable bar 1. In some embodiments, the cylindrical ear stud 411 of the present disclosure may also take other shapes, such as a conical, cylindrical, etc. reasonable shape.

Referring to fig. 5 and 7, the reaction sleeve 42 is hollow and cylindrical, and the inner wall 421 thereof is provided with a spiral groove 422 for cooperating with the ear pin 411. According to some embodiments of the present disclosure, one end of the reaction sleeve 42 is interconnected with the anchoring rib 2 and the other end is sealed (e.g. seamlessly connected) with the sleeve 3, and as to its specific implementation, two exemplary embodiments are described below.

As an example, the reaction sleeve 42 is hollow-cylindrical, as shown in fig. 5 and 6, with a reduced design at its lower end and can be interconnected with the anchoring rib 2 by means of a screw thread. The upper end of reaction sleeve 42 is uncovered form (there is not the throat design), and this moment in reaction sleeve 42 can be put into from the upper end to self-discharging nut 41, then will overlap the muscle 1 dismantled that has sleeve pipe 3 and insert from the upper portion is uncovered, wherein can dismantle muscle 1 through screw thread and self-discharging nut 41 swivelling joint and installation, and sleeve pipe 3 then with the upper portion uncovered adaptation in shape and mutual seal up.

As another example, as shown in FIGS. 7-9, the reaction sleeve 42 also has a flange 423 on the upper end (in this case the upper end has a necked-down design and forms a cylindrical flange, or neck), and the lower end is an open design (no necked-down design). At this time, the dump nut 41 may be placed into the reaction sleeve 42 through the opening at the lower end, and then the detachable rib 1 sleeved with the sleeve 3 is inserted from the upper portion, wherein the detachable rib 1 is rotatably connected and installed with the dump nut 41 through a thread, and the sleeve 3 is adapted to the flange 423 in shape and externally sleeved on the flange 423, so that the two are sealed with each other. Finally, the lower end of the reaction sleeve 42 and the anchoring rib 2 are fixed and sealed to each other by means of, for example, welding. The overall structure of the connecting piece 4 that this example constitutes can be so that can dismantle muscle 1 when being pulled (for example take-up through tensioning equipment), be difficult for going out from the upper end opening slippage of reaction sleeve 42 to more be favorable to taking up to dismantling muscle 1, and increase prestressing force to the bank protection stake, the prevention is out of shape, and plays better supporting effect.

According to some embodiments of the present disclosure, it is preferable that the pitch of the center line of the spiral groove 422 is equal to the pitch formed by the ear pin 411 in a spiral shape. It will be appreciated that the helical rotation of the stud 411 in the helical groove 422 is preferably achieved by the arrangement and cooperation of the thread pitch, so that the self-discharging nut 41 will rotate inside the reaction sleeve 42 counterclockwise around the axis of the detachable rib 1 when it is pressed downwards.

Referring to fig. 6 and 9, according to some embodiments of the present disclosure, when the self-discharging nut 41 is pressed downward, the stud 411 may receive a circumferential counter-torque force of the spiral groove 422 to drive the self-discharging nut 41 to rotate counterclockwise around the axis of the detachable rib 1 (for example, by rotating counterclockwise, the self-discharging nut 41 may be disengaged from the detachable rib 1 inside the counter-force sleeve 42).

It is understood that, with the structural design of the self-discharging nut 41 and the reaction sleeve 42 adopted in the exemplary embodiment of the present disclosure, the detachable rib 1 can be detached from the connection member 4 and the anchoring rib 2 and can be detached from the sleeve 3 by applying a downward pressing force on the detachable rib 1. The detachable rib 1 can be still detached to realize recovery under the condition that the reinforcement cage is bent, twisted or deformed in the process of hoisting or inserting into a pile hole, so that the defect that recovery cannot be realized under the condition by adopting an operation mode of rotating or rotating the longitudinal rib is overcome.

Example 2: manufacturing method of detachable reinforcement cage

An exemplary embodiment of the present disclosure provides a method of manufacturing a removable-rebar cage, which forms the removable-rebar cage 10 of embodiment 1 of the present disclosure after manufacturing.

The following describes an exemplary method for manufacturing a removable-rebar reinforcement cage, which is the removable-rebar reinforcement cage 10 of embodiment 1 and will not be described herein again. The manufacturing method of the detachable reinforcement cage can comprise the following steps.

In step 102, the sleeve holder 7 is welded to the annular frame rib 6, and then the sleeve 3 with the detachable rib 1 is inserted into the sleeve holder 7, and the sleeve holder 7 is clamped to the sleeve 3.

Proceeding to step 104, in step 104, the second end 12 of the detachable bead 1 and the connecting element 4 are interconnected and the sleeve 3 and the connecting element 4 are sealed (e.g. seamlessly connected) to each other.

Proceeding to step 106, in step 106, the anchoring ribs 2 are connected to the connectors 4.

Proceeding to step 108, in step 108, a stirrup 8 is wound around the casing 3 from the outside direction and tightened with a burning wire at the contact point of the stirrup 8 with the casing 3.

Through the steps, the detachable reinforcement cage 10 in the embodiment 1 of the present disclosure can be manufactured quickly and conveniently, and all advantages of the detachable reinforcement cage 10 in the embodiment 1 of the present disclosure are achieved.

From the above description of the embodiments, it will be apparent to those skilled in the art that the present disclosure may be implemented in other configurations, and the features of the present disclosure are not limited to the above preferred embodiments. Any changes or modifications that can be easily conceived by one skilled in the art of the present disclosure are intended to be covered by the scope of the present disclosure.

Claims

1. A removable muscle steel reinforcement cage which characterized in that includes:

a removable bar (1) extending in the direction of the pile hole and having a first end (11) at the top and a second end (12) at the bottom;

an anchoring rib (2) adjacent to said second end (12) and interconnected to said detachable rib (1) by a connector (4); and

the sleeve (3) is sleeved on the outer side of the detachable rib (1), the sleeve (3) is mutually installed with the detachable rib (1) through a nut at a position close to the first end (11), and is mutually installed with the detachable rib (1) through the connecting piece (4) at a position close to the second end (12);

wherein the connector (4) is arranged to enable the detachable rib (1) to be disconnected from the connector (4) and the anchoring rib (2) and to be detached from the sleeve (3) when the detachable rib (1) is subjected to a downward pressing force.

2. The removable rebar cage of claim 1, wherein the connector (4) comprises a self-unloading nut (41) and a reaction sleeve (42); when the self-discharging nut (41) receives downward pressing force, the self-discharging nut can rotate around the axis of the detachable rib (1) anticlockwise in the reaction sleeve (42).

3. The removable rebar reinforcement cage of claim 2, wherein the self-unloading nut (41) is rotatably sleeved within the reaction sleeve (42), and wherein the second end (12) of the removable rebar (1) is rotatably sleeved within the self-unloading nut (41) via threads.

4. A cage according to claim 3, wherein the self-removing nut (41) is cylindrical and provided with four cylindrical studs (411); the ear nails (411) are uniformly arranged on the outer cylindrical surface of the self-discharging nut (41) in a spiral shape.

5. The removable rebar cage of claim 4, wherein the self-unloading nut (41) is provided with a threaded through hole (412) along an axis, the through hole (412) being rotatably connectable with the second end (12) of the removable rebar (1).

6. A cage according to claim 5, characterised in that the reaction sleeve (42) is hollow and cylindrical, and the inner wall (421) thereof is provided with helical grooves (422) which cooperate with the studs (411).

7. Detachable reinforcement cage according to claim 6, characterized in that the counterforce sleeve (42) is interconnected at one end to the anchoring rib (2) and at the other end to the sleeve (3).

8. The rebar cage of claim 7, wherein the helical groove (422) has a center line pitch equal to a pitch formed by the helical ear pin (411).

9. The cage according to claim 8, wherein when the self-unloading nut (41) is pressed downwards, the lug nail (411) is subjected to a circumferential counter-torque force of the spiral groove (422) to drive the self-unloading nut (41) to rotate counterclockwise around the axis of the detachable rib (1).

10. Detachable reinforcement cage according to any of claims 1-9, characterized in that it further comprises annular studs (6) supporting the sleeve (3) from the inside direction.

11. The removable rebar cage of claim 10, wherein the frame rebar (6) is welded with a sleeve clamp (7) at a contact point with the sleeve (3); the sleeve clamps (7) are uniformly distributed on the frame studs (6) and are used for inserting and fixing the sleeve (3).

12. Detachable reinforcement cage according to any of claims 1 to 9, characterized in that it further comprises stirrups (8) wound around the sleeve (3) from the outside direction.

13. A split-bar reinforcement cage according to claim 12, wherein the stirrups (8) are fire-wired at the contact points with the casing (3).

14. Detachable reinforcement cage according to any of claims 1-9, characterized in that the anchoring ribs (2) are tapered overall.

15. A method of manufacturing a split-bar reinforcement cage, characterized in that it forms a split-bar reinforcement cage (10) according to any one of claims 1 to 14 after manufacture.

16. The method of making a removable rebar cage of claim 15, comprising: welding a sleeve clamp (7) on an annular frame rib (6), then inserting the sleeve (3) provided with the detachable rib (1) into the sleeve clamp (7), and clamping the sleeve clamp (7) on the sleeve (3).

17. The method of making a removable rebar cage of claim 16, further comprising: interconnecting the second end (12) of the detachable rib (1) with the connecting piece (4) and sealing the sleeve (3) with the connecting piece (4) against each other.

18. The method of making a removable rebar cage of claim 17, further comprising: and connecting the anchoring ribs (2) to the connecting pieces (4).

19. The method of making a removable rebar cage of claim 18, further comprising: and winding the stirrup (8) on the sleeve (3) from the external direction, and tightly binding the contact point position of the stirrup (8) and the sleeve (3) by using a burning wire.