CN115573338A - Variable diameter steel reinforcement cage - Google Patents

Abstract

The application discloses a steel cage with variable diameter, which relates to the technical field of geotechnical anchoring equipment. It includes a base and several vertical steel bars arranged in a circle. Between the shapes, the base is provided with a sliding hole for the anchor rod to slide, and the anchor rod is fixedly connected with a mounting plate, and the mounting plate is located above the base, and the mounting plate and each A connecting rod 1 is arranged between the vertical reinforcing bars, one end of the connecting rod 1 is hinged to the corresponding vertical reinforcing bar, the other end of the connecting rod 1 is hinged to the mounting plate, and the connecting rod 1 is hinged to the corresponding vertical reinforcing bar. The top of one is inclined to the side close to the anchor rod. A connecting rod two is installed between the base and each vertical steel bar. One end of the connecting rod two is hinged to the corresponding vertical steel bar, and the other end of the connecting rod two is hinged to the base. seat, the top of the connecting rod 2 is inclined to the side away from the anchor rod. The present application has the effect of increasing the possibility of deployment of the reinforcement cage in the anchorage hole.

Description

A variable diameter reinforcement cage

technical field

The present application relates to the technical field of geotechnical anchoring equipment, in particular to a variable-diameter reinforcement cage.

Background technique

During the excavation and construction of slopes or foundation pits, it is necessary to strengthen the slope surface or foundation surface of foundation pits with broken rocks and high degree of weathering. Usually, the method of inserting anchor rods and grouting is used for rock and soil reinforcement. For the foundation pit rock mass with abundant groundwater, the anchor rod inserted into the rock mass must have a certain anti-floating ability. The anchor hole, and a steel cage with a variable diameter is installed at the bottom of the anchor rod. After the steel cage enters the bottom of the anchor hole with the anchor rod, the steel cage is expanded, and then grout is injected into the anchor hole and the anchor rod hole, finally forming a "bottom". Thick upper fine" anchoring structure, in order to reduce the buoyancy of groundwater on the impact of the anchor.

The Chinese invention patent document with the publication number CN114561977A in the related art discloses a prestressed enlarged head anti-floating anchor rod, including a steel cage and a steel cage fixer, combined with the accompanying drawing 2 of the above patent document, the steel cage The vertical reinforcement is in contact with the top surface of the reinforcement cage holder. After the reinforcement cage reaches the bottom of the hole with the reinforcement cage holder, during the grouting process, the vertical reinforcement of the reinforcement cage rushes away from the reinforcement cage holder by the grouting pressure. In this way, the radius of the steel cage is increased, so that the anchor rod can achieve the effect of anchoring and anti-floating.

If the grouting pressure of the grouting equipment is insufficient, the thrust formed by the grouting pressure on the vertical reinforcement of the reinforcement cage will make it difficult to break the vertical reinforcement of the reinforcement cage, and it will not be convenient for the reinforcement cage to expand in the anchorage hole, then the reinforcement cage It will be difficult to exert its anchoring effect in the anchor hole.

Contents of the invention

In order to improve the possibility of deploying the reinforcement cage in the anchor hole, the present application provides a variable-diameter reinforcement cage.

A variable-diameter reinforcement cage provided by the application adopts the following technical scheme:

A variable-diameter reinforcement cage, comprising a base and several vertical reinforcements arranged in a circle, anchor rods are located between the circles formed by the several vertical reinforcements, and the base is provided with holes for the There is a sliding hole through which the anchor rod slides, and a mounting plate is fixedly connected to the anchor rod, and the mounting plate is located above the base, and a connecting rod is arranged between the mounting plate and each vertical steel bar. , one end of the connecting rod one is hinged to the corresponding vertical steel bar, the other end of the connecting rod one is hinged to the mounting plate, and the top end of the connecting rod one is inclined to the side close to the anchor rod , a connecting rod two is installed between the base and each vertical steel bar, one end of the connecting rod two is hinged to the corresponding vertical steel bar, and the other end of the connecting rod two is hinged to the base , the top end of the second connecting rod is inclined to the side away from the anchor rod.

Through the above technical scheme, the operator lifts the bolt through the hoisting equipment, the steel cage is hoisted along with the bolt, and the steel cage naturally sags under the action of its own gravity in a shrinking state, and the hoisting equipment separates the anchor and the steel cage from each other. When the steel cage reaches the anchor hole, the bottom of the base will contact the bottom wall of the anchor hole. At this time, the operator releases the restraint of the hoisting equipment on the anchor rod, and the steel cage is under its own gravity. Under the action of moving downward, the vertical steel bar drives the end of the connecting rod 1 and connecting rod 2 to move away from the anchor rod, and the vertical steel bar expands outward under the thrust of the connecting rod 1 and connecting rod 2, so that the radius of the reinforcement cage Increase, so that the reinforcement cage exerts the anchoring effect in the anchoring hole.

In addition, the operator can also press down the anchor rod, so that the first connecting rod and the second connecting rod are stretched, so as to facilitate the deployment of the reinforcement cage. This kind of deployment method of the reinforcement cage does not need to rely on the thrust formed by the grouting pressure to push the vertical reinforcement to expand. It only needs to rely on the self-weight of the reinforcement cage and artificially pressing the anchor rod to expand the reinforcement cage, thereby improving the deployment of the reinforcement cage in the anchor hole. possibility.

In a preferred example, the present application can be further configured as: including several stirrups distributed vertically, the vertical steel bars are installed on the inside of the stirrups, and the length of a single stirrup is greater than that in the stretched state The perimeter of the circle formed by several vertical steel bars below.

Through the above technical scheme, since the length of a single stirrup is greater than the circumference of a circle formed by several vertical steel bars in the stretched state, as the vertical steel bars are stretched, the stirrups still have overlapping lengths. Existence, when the anchor hole and the anchor rod hole are filled with grout, the stirrup can still cooperate with the vertical reinforcement to play the anchoring role of the reinforcement cage.

In a preferred example, the present application may be further configured as follows: a locator for installing the stirrup is fixedly connected to the vertical steel bar, and a positioning hole for the stirrup to pass through is opened on the locator.

Through the above technical scheme, when the steel cage is hoisted into the anchor hole with the anchor rod, since the locator is fixedly connected to the vertical steel bar, and the stirrup is installed in the positioning hole of the locator, the stirrup and the anchor rod are reduced. The friction of the inner wall of the hole causes the possibility of vertical displacement of the stirrups, thereby reducing the possibility of changing the spacing of adjacent stirrups, and maintaining the consistency between the actual spacing of the stirrups and the design spacing of the stirrups.

In a preferred example, the present application can be further configured as follows: several positioning holes are opened on each of the locators, each stirrup includes a tightening portion and an overlapping portion, and the stirrup of the same stirrup The tightening part is passed through one of the positioning holes, and the overlapping part of the same stirrup is passed through the remaining positioning holes.

Through the above technical scheme, in the process of gradually expanding the stirrup along with the vertical reinforcement, since the stirrup's tightening part and overlapping part are set in different positioning holes on the locator, the overlapping part and overlapping part of the same stirrup are reduced. The friction force between the clamping parts further improves the possibility that the reinforcement cage can be expanded.

In a preferred example, the present application can be further configured as follows: a grouting channel is opened in the base, a grouting pipe is installed at the entrance of the grouting channel, and the grouting pipe communicates with the grouting channel , the mounting plate is provided with a mounting hole through which the grouting pipe passes.

Through the above technical solution, before hoisting the anchor rod and steel cage, the operator passes the grouting pipe through the installation hole on the mounting plate and inserts it at the entrance of the grouting channel, and the grouting pipe is hoisted into the anchoring hole along with the base Inside, after the reinforcement cage is unfolded, the end of the grouting pipe away from the base is connected to the grouting equipment, and the grouting equipment injects the grout into the anchor hole along the grouting pipe and the grouting channel, so that the anchoring can be completed sequentially from bottom to top Grouting operations for holes and bolt holes.

In a preferred example, the present application can be further configured as follows: the inner wall at the outlet of the grouting channel is provided with a plugging groove, and a plugging plate is slid vertically inside the plugging groove, and the plugging plate It is used to block the grouting channel.

Through the above technical scheme, when the base is hoisted into the anchor hole with the anchor, the grouting channel is blocked by the blocking plate, reducing the blockage of the grouting channel by gravel and mud on the inner wall of the anchor hole Possibility; when the reinforcement cage is unfolded, the grouting channel is opened, and at this time, the grout is injected along the grouting pipe and the grouting channel, and finally the grouting operation of the anchor hole and the anchor hole is completed.

In a preferred example, the present application may be further configured as follows: a lead screw is rotatably installed in the base, and the blocking plate is screwed to the lead screw.

Through the above technical solution, when the reinforcement cage is unfolded, the operator rotates by driving the screw, and since the plugging plate is threadedly connected to the screw, the screw drives the plugging plate to move down along the plugging groove, thereby opening the grouting channel , so that the operator can inject grout into the anchor hole along the grouting pipe and the grouting channel.

In a preferred example, the present application can be further configured as follows: a rack is installed on the anchor rod, the length direction of the rack is consistent with that of the anchor rod, and a drive shaft is installed in rotation in the base, and the A spur gear is installed on the drive shaft, and the spur gear and the rack are meshed with each other. A bevel gear 1 is installed on the drive shaft, and a bevel gear 2 is installed on the lead screw. The bevel gear 1 and the bevel gear The two gears mesh with each other.

Through the above technical solution, when the bottom surface of the base abuts against the inner wall of the bottom surface of the anchor hole, the vertical steel bar moves downward under the action of its own gravity and the thrust of the connecting rod 1 and connecting rod 2. On the one hand, the reinforcement cage is expanded, On the other hand, the anchor rod slides down along the sliding hole, and the rack also moves down with the anchor rod. The rack drives the spur gear to rotate, the spur gear drives the transmission shaft to rotate, the transmission shaft drives the bevel gear to rotate, and the bevel gear drives The second bevel gear rotates, the second bevel gear drives the lead screw to rotate, and the lead screw drives the blocking plate to move downward, thereby opening the grouting channel.

In a preferred example, the present application can be further configured as follows: each of the vertical steel bars includes a sleeve and several unit steel bars, each end of the unit steel bar is provided with threads, and the upper part of the sleeve runs through A connection hole is opened, and the end of the unit steel bar is screwed to the inner wall of the connection hole, and the first connecting rod and the second connecting rod are hinged to the vertical steel bar through the sleeve.

Through the above technical scheme, since the vertical steel bars are composed of sleeves and several unit steel bars, and the adjacent unit steel bars are connected through the sleeves, on the one hand, the short steel bars produced during the construction process can be fully utilized; on the other hand, The parts required for the hinge connection of the first connecting rod and the second connecting rod can be directly welded on the sleeve instead of being welded on the vertical steel bar, thereby reducing the structural damage caused by welding to the vertical steel bar.

In summary, the application includes the following beneficial technical effects:

1. After the steel cage enters the anchor hole with the anchor rod, the vertical steel bar can be unfolded under the action of the steel cage's own gravity and the thrust formed by the operator pressing the anchor rod against the vertical steel bar, without the need for the thrust formed by the grouting pressure, that is The reinforcement cage can be deployed in the anchor hole, which improves the possibility of reinforcement cage deployment, so that the anchoring effect of the reinforcement cage in the anchor hole can be exerted;

2. In the process of the stirrup gradually expanding with the vertical steel bar, since the hooped part and overlapping part of the stirrup are set in different positioning holes on the locator, the overlapping part and the overlapping part of the same stirrup are reduced. The friction force between them further increases the possibility that the reinforcement cage can be deployed;

3. When the bottom surface of the base abuts against the inner wall of the bottom surface of the anchor hole, the anchor rod moves downward with the reinforcement cage. On the one hand, the reinforcement cage is expanded; on the other hand, the anchor rod slides down along the sliding hole, which can The lead screw is driven to rotate, and the lead screw drives the blocking plate to move downward, so that the grouting channel is opened.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the embodiment of the present application, mainly illustrating the structure of the base, the anchor rod and the grouting pipe.

Fig. 2 is a partial structural schematic diagram of an embodiment of the present application, mainly illustrating the structure of a reinforcement cage.

Fig. 3 is a schematic cross-sectional view along the direction A-A in Fig. 1, mainly illustrating the structure of the sliding hole.

Fig. 4 is an exploded schematic diagram of a vertical steel bar in an embodiment of the present application, mainly illustrating the structure of a unit steel bar, a sleeve and a positioner.

Fig. 5 is a partially enlarged schematic view of part B in Fig. 3, mainly illustrating the structure of the blocking plate, the lead screw and the transmission shaft.

Explanation of reference signs:

1. Base; 11. Sliding hole; 12. Grouting channel; 121. Inlet; 122. Outlet; 13. Grouting pipe; 14. Plugging groove; 2. Vertical reinforcement; 21. Sleeve; 211. Connection Hole; 22, unit steel bar; 222, thread; 201, connecting rod one; 202, connecting rod two; 3, anchor rod; 31, mounting plate; 311, mounting hole; 32, rack; 4, stirrup; 41, Tightening part; 42, overlapping part; 5, locator; 51, positioning hole; 6, blocking plate; 61, lead screw; 611, bevel gear two; 7, transmission shaft; 71, flat gear; 72, bevel gear one.

detailed description

The present application will be further described in detail in conjunction with accompanying drawings 1 to 5 below.

The embodiment of the present application discloses a variable-diameter reinforcement cage.

With reference to accompanying drawing 1 and shown in accompanying drawing 2, a kind of steel bar cage of variable diameter comprises eight vertical reinforcing bars 2, six stirrup bars 4 and the base 1 installed on the bottom of the anchor rod 3, the base 1 is cylindrical, The radius of the base 1 is smaller than the radius of the reinforcement cage in the contracted state. The eight vertical steel bars 2 are arranged in a circle, and the anchor rod 3 is located at the center of the circle formed by the vertical steel bars 2 . Six stirrups 4 are evenly arranged vertically and are all installed on the vertical steel bars 2. The length of a single stirrup 4 is greater than the circumference of the circle formed by the vertical steel bars 2 in the stretched state, and the vertical steel bars 2 are evenly spaced. Located on the inner side of the stirrup 4, with reference to Figure 3, the base 1 is vertically provided with a sliding hole 11 for the anchor rod 3 to slide.

With reference to shown in accompanying drawing 2, on anchor rod 3, be fixedly connected with mounting plate 31, the cross section of mounting plate 31 is circular, and the radius of mounting plate 31 is less than the radius of the reinforcement cage under the shrinkage state, and mounting plate 31 is positioned at base 1. Directly above, a connecting rod 201 is arranged between the mounting plate 31 and each vertical reinforcing bar 2, one end of the connecting rod 201 is hinged to the corresponding vertical reinforcing bar 2, and the other end of the connecting rod 201 is hinged to the bottom of the mounting plate 31 , the top of connecting rod one 201 is inclined to the side close to the anchor rod 3, connecting rod two 202 is installed between the base 1 and each vertical steel bar 2, and one end of connecting rod two 202 is hinged to the corresponding vertical steel bar 2 , the other end of the second connecting rod 202 is hinged on the top of the base 1 , and the top end of the second connecting rod 202 is inclined to the side away from the anchor rod 3 .

When the operator lifts the anchor rod 3 together with the reinforcement cage, the reinforcement cage naturally sags under the action of its own gravity and is in a contracted state. When the reinforcement cage reaches the anchor hole, the bottom of the base 1 will contact the bottom wall of the anchor hole. At this time, the operator releases the restraint of the hoisting equipment on the anchor rod 3, and by pressing down on the anchor rod 3, the anchor rod 3 applies a thrust to the vertical steel bar 2 through the connecting rod 1 201 and the connecting rod 2 202, and the vertical steel bar 2 is on its own. Gravity and the thrust of the first connecting rod 201 and the second connecting rod 202 move downwards, so that the vertical reinforcement 2 is expanded outwards, and the radius of the reinforcement cage is increased, so that the reinforcement cage can exert an anchoring effect in the anchorage hole.

Referring to accompanying drawings 2 and 4, each vertical steel bar 2 includes a sleeve 21 and three unit steel bars 22, which can make full use of the short steel bars produced in the construction process. The end of each unit steel bar 22 is provided with thread 222, and the upper edge of the sleeve 21 is provided with a connecting hole 211 vertically. The inner wall thread 222 of 211 is connected, and the first connecting rod 201 and the second connecting rod 202 are both hinged to the vertical steel bar 2 through the sleeve 21 . The parts required for the hinge connection of the first connecting rod 201 and the second connecting rod 202 can be directly welded on the sleeve 21 without being welded on the vertical steel bar 2 , thereby reducing the structural damage caused by welding to the vertical steel bar 2 .

With reference to accompanying drawing 2 and shown in accompanying drawing 4, the locator 5 that is used to install the stirrup 4 is fixedly connected on the vertical steel bar 2, and the locator 5 is the metal plate that is vertically arranged, is provided with two for the hoop on the locator 5. The positioning hole 51 that the rib 4 passes through, the inner diameter of the positioning hole 51 is slightly larger than the outer diameter of the stirrup 4, two positioning holes 51 are distributed vertically, each stirrup 4 includes a tightening part 41 and an overlapping part 42, and the tightening part 41 and overlapping part 42 are integrally formed, the tightening part 41 of the same stirrup 4 is passed through one of the positioning holes 51 of the positioner 5, and the overlapping part 42 of the same stirrup 4 is passed through the rest of the positioner 5 Inside the positioning hole 51.

The operator installs the stirrup 4 on the vertical steel bar 2 through the positioner 5. Compared with the traditional binding installation, it reduces the possibility of vertical displacement of the stirrup 4 caused by friction between the stirrup 4 and the inner wall of the anchor rod 3 hole. Therefore, the actual distance between the stirrups 4 and the designed distance between the stirrups 4 can be kept consistent. In addition, since the tightening part 41 and the overlapping part 42 of the stirrup 4 are pierced in different positioning holes 51 on the positioner 5, the friction between the overlapping part 42 and the tightening part 41 of the same stirrup 4 is reduced. , thereby further improving the possibility that the reinforcement cage can be deployed.

Referring to the accompanying drawings 3 and 5, the base 1 is provided with a grouting channel 12, the inlet 121 of the grouting channel 12 is located at the top of the base 1, and the outlet 122 of the grouting channel 12 is located on the peripheral surface of the base 1, A grouting pipe 13 is installed at the entrance 121 of the grouting channel 12 , and the grouting pipe 13 is connected to the grouting channel 12 . The mounting plate 31 is vertically provided with a mounting hole 311 for the grouting pipe 13 to pass through. The inner wall at the outlet 122 of the grouting channel 12 is provided with a plugging groove 14 vertically, and a plugging plate 6 is vertically slid in the plugging groove 14, and the plugging plate 6 is used to block the grouting channel 12 , It reduces the possibility that the gravel and sludge on the inner wall of the anchor rod 3 holes block the grouting channel 12 during the hoisting process. A lead screw 61 is rotatably installed in the base 1 , and the lead screw 61 is vertically arranged, and the thread 222 of the blocking plate 6 is connected to the lead screw 61 .

The anchor rod 3 is fixedly connected with a rack 32, and the length direction of the rack 32 and the anchor rod 3 is consistent. The transmission shaft 7 is installed in the base 1 for rotation, and the transmission shaft 7 is arranged horizontally. The transmission shaft 7 is coaxially connected with a spur gear. 71, flat gear 71 and tooth bar 32 are meshed with each other, coaxially connected bevel gear one 72 on the transmission shaft 7, coaxially connected with bevel gear two 611 on the leading screw 61, bevel gear one 72 and bevel gear two 611 are meshed with each other.

After the bottom surface of the base 1 abuts against the inner wall of the bottom surface of the anchor hole, the vertical steel bar 2 moves downward under the action of its own gravity and the thrust of the connecting rod 1 201 and the connecting rod 2 202. On the one hand, the reinforcement cage is expanded, and on the other hand On the one hand, the anchor rod 3 slides downward along the sliding hole 11, the rack 32 also moves downward with the anchor rod 3, the rack 32 drives the spur gear 71 to rotate, the spur gear 71 drives the transmission shaft 7 to rotate, and the transmission shaft 7 drives the cone Gear 1 72 rotates, bevel gear 1 72 drives bevel gear 2 611 to rotate, bevel gear 2 611 drives lead screw 61 to rotate, lead screw 61 drives blocking plate 6 to move downward, so that grouting channel 12 is opened, so that operators can The grout is injected into the anchor hole along the grouting pipe 13 and the grouting channel 12 .

The implementation principle of this embodiment is: before lifting the anchor rod 3 and the reinforcement cage, the operator first passes the grouting pipe 13 through the installation hole 311 and installs it at the entrance of the grouting channel 12, and then lifts the anchor rod 3 through the hoisting equipment. Hoist and transfer to the anchor rod 3 hole, the reinforcement cage naturally sags under the action of its own gravity and is in a shrinking state. When the base 1 falls to the bottom of the anchor rod 3 with the anchor rod 3, release the restraint of the anchor rod 3 by the hoisting equipment , and then press the anchor rod 3 downwards, the anchor rod 3 applies a thrust to the vertical steel bar 2 through the connecting rod 1 201 and the connecting rod 2 202, and the vertical reinforcing bar 2 is under the action of its own gravity and the thrust of the connecting rod 1 201 and the connecting rod 2 202 Move down, so that the vertical reinforcement 2 is expanded outwards, so that the radius of the reinforcement cage increases, and finally the grouting pipe 13 is connected to the grouting equipment to start the grouting operation.

In addition, during the downward movement of the anchor rod 3, the rack 32 also moves downward with the anchor rod 3, the rack 32 drives the spur gear 71 to rotate, the spur gear 71 drives the bevel gear 1 72 to rotate through the transmission shaft 7, and the bevel gear One 72 drives the lead screw 61 to rotate through the bevel gear two 611, and the lead screw 61 drives the blocking plate 6 to move downward, so that the grouting channel 12 is opened, so as to facilitate the anchoring hole and the anchor along the grouting pipe 13 and the grouting channel 12. Inject grout into the rod 3 holes.

The embodiments of this specific implementation mode are all preferred embodiments of the present application, and do not limit the protection scope of the present application in turn, so: all equivalent changes made according to the structure, shape and principle of the present application should be covered by this application. within the scope of the application.

Claims (9)

1. A variable-diameter reinforcement cage, characterized in that: comprise a base (1) and several vertical reinforcements (2) arranged in a circle, anchor rods (3) are positioned at several vertical reinforcements ( 2) Between the formed circles, the base (1) is provided with a sliding hole (11) for the sliding of the anchor rod (3), and the anchor rod (3) is fixedly connected with a mounting plate (31 ), the mounting plate (31) is located above the base (1), and a connecting rod (201) is arranged between the mounting plate (31) and each of the vertical reinforcement bars (2), so One end of the connecting rod one (201) is hinged to the corresponding vertical steel bar (2), the other end of the connecting rod one (201) is hinged to the mounting plate (31), and the connecting rod one (201) ) is inclined to the side close to the anchor rod (3), and a connecting rod two (202) is installed between the base (1) and each vertical steel bar (2), and the connecting rod One end of the two (202) is hinged to the corresponding vertical steel bar (2), the other end of the connecting rod two (202) is hinged to the base (1), and the top of the connecting rod two (202) is away from One side of the anchor rod (3) is inclined. 2. A variable-diameter reinforcement cage according to claim 1, characterized in that: it includes several stirrups (4) distributed vertically, and the vertical reinforcement (2) is installed on the stirrups ( 4), the length of a single stirrup (4) is greater than the perimeter of the circle formed by several vertical reinforcements (2) in the stretched state. 3. A kind of variable-diameter reinforcement cage according to claim 2, characterized in that: said vertical reinforcement (2) is fixedly connected with a locator (5) for installing said stirrup (4), so The locator (5) is provided with a positioning hole (51) through which the stirrup (4) passes. 4. A kind of variable-diameter steel cage according to claim 3, characterized in that: the positioning holes (51) on each of the positioners (5) are provided with several, each stirrup (4 ) includes a tightening portion (41) and an overlapping portion (42), the tightening portion (41) of the same stirrup (4) is passed through one of the positioning holes (51), and the same The overlapping portion (42) of the rib (4) is pierced in the remaining positioning holes (51). 5. A variable-diameter reinforcement cage according to claim 1, characterized in that: a grouting channel (12) is opened in the base (1), and the inlet (121) of the grouting channel (12) ) is installed with a grouting pipe (13), the grouting pipe (13) communicates with the grouting channel (12), and the mounting plate (31) is provided with a grouting pipe (13) through the mounting holes (311). 6. A variable-diameter reinforcement cage according to claim 5, characterized in that: the inner wall at the outlet (122) of the grouting channel (12) is provided with a plugging groove (14), and the plugging A blocking plate (6) is vertically slidably installed in the groove (14), and the blocking plate (6) is used to block the grouting channel (12). 7. A variable-diameter reinforcement cage according to claim 6, characterized in that: a lead screw (61) is rotatably installed inside the base (1), and the thread (222) of the blocking plate (6) Connected to the lead screw (61). 8. A kind of variable-diameter reinforcement cage according to claim 7, characterized in that: a rack (32) is installed on the anchor rod (3), and the rack (32) and the anchor rod ( 3) the length direction is the same, and the transmission shaft (7) is installed in the rotation of the base (1), and the spur gear (71) is installed on the transmission shaft (7), and the spur gear (71) and the The racks (32) mesh with each other, the first bevel gear (72) is installed on the transmission shaft (7), the second bevel gear (611) is installed on the described screw (61), the first bevel gear (72) and The two bevel gears (611) mesh with each other. 9. A variable-diameter reinforcement cage according to claim 1, characterized in that: each of said vertical reinforcements (2) comprises a sleeve (21) and several unit reinforcements (22), each of said The ends of the unit steel bars (22) are all provided with threads (222), and the sleeve (21) is penetrated with connection holes (211), and the ends of the unit steel bars (22) and the connection holes ( 211) are connected with the inner wall thread (222), and the first connecting rod (201) and the second connecting rod (202) are both hinged to the vertical steel bar (2) through the sleeve (21).

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