A reinforcing cage grading assembly structure and connecting method of a fabricated underground engineering

Abstract

The application relates to a reinforcing cage grading assembly structure and connecting method of a fabricated underground project, and relates to the underground project construction field, which comprises a beam reinforcing cage and a prefabricated plate reinforcing cage, the beam reinforcing cage is arranged on the two sides of the prefabricated plate reinforcing cage, the prefabricated plate reinforcing cage comprises upper reinforcing mesh, lower reinforcing mesh and connecting reinforcing bars, one end of the connecting reinforcing bars is bound with the upper reinforcing mesh through wire binding, the other end is bound with the lower reinforcing mesh through wire binding, the upper reinforcing mesh is provided with overlapping rods, the overlapping rods are used for overlapping the oppositely arranged beam reinforcing cages, the lower reinforcing mesh is provided with connecting reinforcing bars, the connecting reinforcing bars and the lower reinforcing mesh are connected through sliding connection units, the connecting reinforcing bars can be inserted into the oppositely arranged beam reinforcing cages, and the adjacent two connecting reinforcing bars with different sliding directions are connected through connecting fixing units. The prefabricated plate reinforcing cage is adopted, the plate reinforcing cage installation time is reduced, and the construction efficiency of the whole project is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of underground engineering construction, and in particular to a prefabricated underground engineering reinforcement cage hierarchical assembly structure and connecting method. BACKGROUND

[0002] In the current underground engineering construction, in order to ensure the structural strength of underground facilities, a large number of reinforcement cage structures are needed in the construction, and then concrete is poured on the reinforcement cage structure to form a reinforced concrete main support structure of the underground facility.

[0003] In the traditional underground structure construction process, the reinforcement is transported to the construction site, and then cutting, binding and other work of the reinforcement are carried out on site. When binding the slab reinforcement cage, the beam reinforcement cage needs to be bound first. However, the binding of the beam reinforcement cage and the slab reinforcement cage in sequence makes the binding time of the reinforcement cage of the whole project cost large, resulting in low construction efficiency. SUMMARY

[0004] In order to improve the problem that the binding of the beam reinforcement cage and the slab reinforcement cage in sequence makes the binding time of the reinforcement cage of the whole project cost large, resulting in low construction efficiency, the present application provides a prefabricated underground engineering reinforcement cage hierarchical assembly structure and connecting method.

[0005] In one aspect, the prefabricated underground engineering reinforcement cage hierarchical assembly structure provided by the present application adopts the following technical scheme:

[0006] A prefabricated underground engineering reinforcement cage hierarchical assembly structure, comprising a beam reinforcement cage, further comprising a prefabricated slab reinforcement cage, the beam reinforcement cage is arranged on both sides of the prefabricated slab reinforcement cage, the prefabricated slab reinforcement cage comprises an upper reinforcement mesh, a lower reinforcement mesh and a connecting reinforcement, one end of the connecting reinforcement is bound to the upper reinforcement mesh by a binding wire, and the other end of the connecting reinforcement is bound to the upper reinforcement mesh by a binding wire, the upper reinforcement mesh is provided with a lap rod, the lap rod is used for lapping on the oppositely arranged beam reinforcement cage, the lower reinforcement mesh is provided with a connecting reinforcement, the connecting reinforcement and the lower reinforcement mesh are connected by a sliding connection unit, the connecting reinforcement can be inserted into the oppositely arranged beam reinforcement cage, and adjacent two different sliding connecting reinforcements are connected by a connecting fixing unit.

[0007] By adopting the technical scheme, when the plate steel reinforcement cage is installed, the upper steel mesh and the lower steel mesh are assembled into a prefabricated plate steel reinforcement cage through the connecting bars in the factory, then the prefabricated plate steel reinforcement cage is hoisted to the beam steel reinforcement cage, the lapping bars are lapped on the beam steel reinforcement cage, then the connecting bars are pulled out from the sliding connection unit and inserted into the beam steel reinforcement cage, the connecting bars are bound through the wire, then the adjacent two connecting bars are connected through the connecting fixing unit, so that the installation of the prefabricated plate steel reinforcement cage is completed. Compared with the traditional construction of the plate steel reinforcement cage on site, the prefabricated plate steel reinforcement cage can reduce the installation time of the plate steel reinforcement cage, thereby improving the construction efficiency of the whole project.

[0008] In a specific implementable scheme, the sliding connection unit comprises a connecting sleeve, the connecting sleeve is bound on the lower steel mesh through the wire, the connecting bar passes through the connecting sleeve and is slidingly arranged in the connecting sleeve.

[0009] By adopting the technical scheme, when the prefabricated plate steel reinforcement cage is lapped on the beam steel reinforcement cage, the connecting bar is pulled out from the connecting sleeve, so that the extension of the connecting bar and the support of the prefabricated plate steel reinforcement cage are realized.

[0010] In a specific implementable scheme, the connecting fixing unit comprises a support rod, two connecting rods and two clamping pieces, the two connecting rods are respectively arranged at two ends of the support rod, the support rod is bound on the upper steel mesh through the wire, the clamping pieces are arranged on the connecting rods and correspond to the connecting rods one by one, the two clamping pieces correspond to two connecting bars with different sliding directions respectively, the clamping pieces are used for clamping the ends of the connecting bars, and the fasteners are arranged on each connecting rod, and the fasteners are used for clamping and fixing the connecting bars by the clamping pieces.

[0011] By adopting the technical scheme, after the installation of the connecting bars is completed, the support rod is bound on the upper steel mesh, then the two ends of the adjacent connecting bars are clamped by the clamping pieces respectively, and then the connecting bars are fixed by the fasteners, so that the two adjacent connecting bars are connected together, thereby improving the connection strength of the prefabricated plate steel reinforcement cage and the beam steel reinforcement cage.

[0012] In a specific implementable scheme, the clamping piece comprises a bottom rod and a clamping rod, the bottom rod is arranged on the connecting rod, the bottom rod can move to a side of the connecting bar away from the upper steel mesh, and the clamping rod is rotationally arranged on a side of the bottom rod away from the connecting rod, the clamping rod can be rotated towards the connecting rod, so that the clamping rod moves to a side of the connecting bar away from the bottom rod.

[0013] By adopting the technical scheme, when the end of the connecting steel bar is clamped, the connecting rod drives the bottom rod to move below the connecting steel bar first, then the connecting steel bar is placed between the connecting rod and the clamping rod, and then the clamping rod is driven to rotate towards the connecting rod, so that the clamping of the connecting steel bar is realized.

[0014] In a specific embodiment, the bottom rod is provided with an extrusion plate for extruding the connecting steel bar, the bottom rod is provided with a clamping rod for limiting the rotation of the clamping rod, and the extrusion plate and the clamping rod are connected by a connecting piece. The extrusion plate can drive the clamping rod and the clamping rod to be separated.

[0015] By adopting the technical scheme, when the end of the connecting steel bar is clamped, the clamping rod is first fixed, then the connecting steel bar is located between the clamping rod and the connecting rod, the connecting rod is lifted, the connecting steel bar starts to extrude the extrusion plate, the extrusion plate drives the clamping rod to rotate through the connecting piece, the clamping rod is released from the clamping rod, the clamping rod can rotate towards the connecting rod under the push of the torsional spring, and the connecting steel bar is surrounded, thereby reducing the steps of external tools, and the convenience of clamping the connecting steel bar is improved.

[0016] In a specific embodiment, the connecting piece includes an intermediate connecting rod, the clamping rod is rotatably arranged on the bottom rod, the rotation direction of the clamping rod is perpendicular to the rotation direction of the clamping rod, the intermediate connecting rod is slidably arranged on the bottom rod, a supporting spring is arranged between the extrusion plate and the bottom rod, the intermediate connecting rod can drive the clamping rod and the clamping rod to be separated, the intermediate connecting rod is provided with a guide surface, the extrusion plate can slide along the guide surface and push the intermediate connecting rod to slide.

[0017] By adopting the technical scheme, when the connecting steel bar pushes the extrusion plate to slide, the extrusion plate slides along the guide surface and pushes the intermediate connecting rod to slide, the intermediate connecting rod pushes the clamping rod to separate from the clamping rod, so that the clamping rod is released from the clamping rod, and the convenience of clamping the connecting steel bar is improved.

[0018] In a specific embodiment, the fastener includes a fastening screw and a fastening block, the connecting rod is provided with a fixed groove, the fastening screw is inserted into the fixed groove and is rotatably connected with the connecting rod, the fastening block is slidably arranged in the fixed groove, the fastening screw passes through the fastening block and is threadedly connected with the fastening block, the clamping rod can be inserted into the fixed groove, and the fastening block can extrude the clamping rod towards the bottom rod.

[0019] By adopting the technical scheme, when the clamping rod clamps the connecting steel bar, one end of the clamping rod is inserted into the fixed groove, then the fastening screw is rotated, the fastening screw drives the fastening block to extrude the clamping rod, and the clamping rod extrudes the connecting steel bar, so that the connection between the two connecting steel bars is realized.

[0020] In one specific implementation, the connecting rod passes through the support rod and is slidably disposed therein, and a fastening nut is threaded onto the side of the connecting rod that passes through the support rod.

[0021] By adopting the above technical solution, after fixing the connecting steel bars, tightening the fastening nuts makes the support rod press against the steel bars on the upper steel mesh, and then binding the support rod with tie wire, thereby improving the connection strength between the connecting steel bars and the precast slab steel cage.

[0022] In one specific implementation, the end of the connecting steel bar inserted into the beam steel cage is provided with a hook.

[0023] By adopting the above technical solution and setting the hook, the adhesion between the steel bar and the concrete can be increased, the anchoring capacity can be improved, the anchoring failure can be effectively avoided, and the component can be firmly protected from damage.

[0024] On the other hand, the graded connection method for steel cages in prefabricated underground engineering provided in this application adopts the following technical solution:

[0025] A method for graded connection of reinforcing cages in prefabricated underground engineering, using the graded assembly structure of the reinforcing cages in the prefabricated underground engineering, includes the following steps:

[0026] S1. Determine the length of the precast slab reinforcement cage, the diameter and distance of the corner longitudinal bars and stirrups, and the factory produces the precast slab reinforcement cage according to different characteristics;

[0027] S2. After hoisting to the work position, first lap the splice rod onto the beam reinforcement cage, then pull the connecting steel bar out from the precast slab reinforcement cage and tie it to the beam reinforcement cage with tie wire.

[0028] S3. Then, the two ends of the two connecting steel bars with different sliding directions are fixed by connecting and fixing units, and then the connecting and fixing units are tied to the upper steel mesh by tie wire.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] 1. When installing the slab reinforcement cage, the precast slab reinforcement cage is first assembled in the factory. Then, the precast slab reinforcement cage is hoisted onto the beam reinforcement cage, so that the lap splice is lapped onto the beam reinforcement cage. Then, the connecting steel bars are pulled out from the sliding connection unit and inserted into the beam reinforcement cage, and tied with tie wire. Then, two adjacent connecting steel bars are connected through the connection fixing unit, thus completing the installation of the precast slab reinforcement cage. Compared with the traditional on-site construction of slab reinforcement cages, the use of precast slab reinforcement cages can reduce the installation time of slab reinforcement cages, thereby improving the construction efficiency of the entire project.

[0031] 2. By fixing and connecting the free ends of the two adjacent connecting steels, the two connecting steels can form a whole, so as to improve the connecting strength of the whole prefabricated slab steel cage and the beam steel cage. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a structural schematic diagram of a prefabricated underground engineering steel cage hierarchical assembly structure according to an embodiment of the present application.

[0033] Figure 2 is an exploded view for showing the structure of the beam steel cage and the prefabricated slab steel cage.

[0034] Figure 3 is Figure 2 is an enlarged view of part A in FIG.

[0035] Figure 4 is a structural schematic diagram for showing the clamping piece.

[0036] Figure 5 is a structural schematic diagram for showing the fastener.

[0037] Figure 6 is Figure 5 is an enlarged view of part C in FIG.

[0038] Figure 7 is Figure 4 is an enlarged view of part B in FIG.

[0039] BRIEF DESCRIPTION OF DRAWINGS: 1, beam steel cage; 2, prefabricated slab steel cage; 21, upper steel mesh; 22, lower steel mesh; 23, connecting bar; 24, lap bar; 3, connecting steel; 31, hook; 4, sliding connection unit; 41, connecting sleeve; 5, connecting fixed unit; 51, support rod; 52, connecting rod; 53, clamping piece; 531, bottom rod; 532, clamping rod; 5321, accommodation groove; 5331, first rotating shaft; 5332, first torsional spring; 534, extrusion plate; 535, support spring; 536, clamping rod; 5371, second rotating shaft; 5372, rotating support; 5373, second torsional spring; 538, clamping groove; 539, connecting piece; 5391, intermediate connecting rod; 5392, sliding groove; 5393, guide surface; 54, fastener; 541, fastening screw; 542, fastening block; 543, fixed groove; 55, fastening nut. DETAILED DESCRIPTION

[0040] The following will be described in detail in combination with the accompanying Figures 1-7 The present application will be further described in detail.

[0041] The present application discloses a prefabricated underground engineering steel cage hierarchical assembly structure.

[0042] Reference will be made to Figure 1 ,Figure 2 A reinforcing cage grading assembly structure of a fabricated underground engineering comprises a beam reinforcing cage 1, and further comprises a prefabricated slab reinforcing cage 2, the beam reinforcing cage 1 can also be prefabricated and then transported to the site for installation, a space for installing the prefabricated slab reinforcing cage 2 is left between two beam reinforcing cages 1, the beam reinforcing cage 1 is formed by binding the main reinforcement and the stirrup through the wire (the wires in the embodiment are not shown in the drawings), the prefabricated slab reinforcing cage 2 comprises an upper steel mesh 21, a lower steel mesh 22 and a connecting reinforcement 23, the upper steel mesh 21 and the lower steel mesh 22 are both formed by binding the horizontal and vertical interlaced steel bars through the wire, the connecting reinforcement 23 is arranged between the upper steel mesh 21 and the lower steel mesh 22, one end of the connecting reinforcement 23 is bound to the upper steel mesh 21 through the wire, and the other end is bound to the lower steel mesh 22 through the wire, the horizontal steel bars of the upper steel mesh 21 are extended outward to form a lap bar 24, the lap bar 24 can be lapped on two oppositely arranged beam reinforcing cages 1, the lower steel mesh 22 is provided with connecting reinforcements 3, the connecting reinforcements 3 are arranged in two groups along the interval direction between the two beam reinforcing cages 1, the connecting reinforcements 3 in each group are arranged in a plurality of numbers along the length direction of the beam reinforcing cage 1, each connecting reinforcement 3 is connected with the lower steel mesh 22 through a sliding connection unit 4, the connecting reinforcement 3 can be inserted into the oppositely arranged beam reinforcing cage 1, and two adjacent connecting reinforcements 3 with different sliding directions are connected through a connecting fixing unit 5.

[0043] When the prefabricated slab reinforcing cage 2 is installed, the upper steel mesh 21 and the lower steel mesh 22 are assembled to form the prefabricated slab reinforcing cage 2 in the factory through the connecting reinforcement 23, then the prefabricated slab reinforcing cage 2 is hoisted onto the beam reinforcing cage 1, so that the lap bars 24 on both sides of the prefabricated slab reinforcing cage 2 are lapped on the beam reinforcing cage 1, then the beam reinforcing cage 1 is bound through the wire, then the two groups of connecting reinforcements 3 in the prefabricated slab reinforcing cage 2 are pulled out from the sliding connection unit 4 and then inserted into the beam reinforcing cage 1, and the beam reinforcing cage 1 is bound through the wire, then the two adjacent connecting reinforcements 3 are connected through the connecting fixing unit 5, so as to complete the installation of the prefabricated slab reinforcing cage 2, compared with the construction of the traditional slab reinforcing cage on site, the prefabricated slab reinforcing cage 2 can reduce the installation time of the slab reinforcing cage, thereby improving the construction efficiency of the whole project.

[0044] Reference Figure 2The slip connection unit 4 in the embodiment comprises a connecting sleeve 41 which is tied on the lower steel mesh 22 by wire tying. The length of the connecting sleeve 41 is less than the length of the connecting steel bars 3, so that when the connecting steel bars 3 are inserted into the beam steel cage 1, the ends of the connecting steel bars 3 away from the beam steel cage 1 are still outside the connecting sleeve 41. The connecting steel bars 3 pass through the connecting sleeve 41 and are arranged in sliding connection with the connecting sleeve 41. The connecting steel bars 3 are in close contact with the inner wall of the connecting sleeve 41. The free ends of the adjacent two connecting steel bars 3 are provided with a certain gap. The ends of the connecting steel bars 3 inserted into the beam steel cage 1 are bent to form hooks 31.

[0045] When the prefabricated slab steel cage 2 is installed, the connecting steel bars 3 are pulled out of the connecting sleeve 41 from both sides of the prefabricated slab steel cage 2, and then the ends with the hooks 31 are inserted into the beam steel cage 1. Then the connecting steel bars 3 are tied with the steel bars on the beam steel cage 1 by wire tying, thereby completing the preliminary installation of the prefabricated slab steel cage 2. The close contact between the connecting steel bars 3 and the connecting sleeve 41 can better support the prefabricated slab steel cage 2.

[0046] Referring to Figure 2 , Figure 3 The connecting and fixing unit 5 in the embodiment comprises a support rod 51, two connecting rods 52 and two clamping pieces 53. The two connecting rods 52 are arranged at the two ends of the support rod 51 respectively. The support rod 51 is overlapped on the steel bars on the upper steel mesh 21 and then is tied with the upper steel mesh 21 by wire tying. The connecting rods 52 pass through the support rod 51 and are arranged in sliding connection with the support rod 51. After the two connecting rods 52 pass through the support rod 51, they extend towards the connecting steel bars 3. The clamping pieces 53 correspond to the connecting rods 52 one by one. The clamping pieces 53 are located at the ends of the support rod 51 extending to the connecting steel bars 3. The two clamping pieces 53 correspond to the two connecting steel bars 3 moving in different directions respectively. The clamping pieces 53 are used for clamping the ends of the connecting steel bars 3. The fasteners 54 are arranged on each connecting rod 52. The fasteners 54 are used for clamping and fixing the clamping pieces 53 to the connecting steel bars 3.

[0047] Referring to Figure 4 , Figure 5 and Figure 6The clamping piece 53 in the embodiment comprises a bottom rod 531 and a clamping rod 532. The bottom rod 531 is fixedly arranged on the connecting rod 52 and integrally manufactured with the connecting rod 52. The bottom rods 531 on the two connecting rods 52 respectively extend towards the corresponding connecting steel bars 3, so that the two bottom rods 531 are opposite to each other. The bottom rod 531 can move to the lower side of the connecting steel bar 3. One end of the clamping rod 532 is rotationally connected with the bottom rod 531 through a first rotating shaft 5331. The rotating end of the clamping rod 532 is located at one end of the bottom rod 531 away from the connecting rod 52. The free end of the clamping rod 532 can rotate towards the connecting rod 52, so that the connecting rod 52, the bottom rod 531 and the clamping rod 532 surround the connecting steel bar 3. A first torsional spring 5332 is sleeved on the first rotating shaft 5331. One end of the first torsional spring 5332 is fixedly connected with the first rotating shaft 5331. The other end of the first torsional spring 5332 is fixedly connected with the bottom rod 531. Initially, the first torsional spring 5332 extrudes the clamping rod 532 towards the connecting rod 52.

[0048] With reference to Figure 4 、 Figure 7 The bottom rod 531 is provided with an extrusion plate 534 for extruding the connecting steel bar 3. A plurality of supporting springs 535 are arranged between the extrusion plate 534 and the bottom rod 531. One end of each supporting spring 535 is fixedly connected with the extrusion plate 534, and the other end is fixedly connected with the bottom rod 531. The connecting steel bar 3 can extrude the extrusion plate 534 downwards from above the extrusion plate 534. The bottom rod 531 is provided with a clamping rod 536 arranged at the side of the clamping rod 532. A second rotating shaft 5371 is fixedly arranged on the clamping rod 536. The second rotating shaft 5371 is rotationally arranged with the bottom rod 531 through a rotating support 5372. A second torsional spring 5373 is sleeved on the second rotating shaft 5371. One end of the second torsional spring 5373 is fixedly connected with the second rotating shaft 5371, and the other end is fixedly connected with the rotating support 5372. The clamping rod 532 is provided with a clamping groove 538. The free end of the clamping rod 536 extends towards the clamping rod 532 and is inserted into the clamping groove 538. A space is left in the clamping groove 538 for the clamping rod 536 to be extracted. When the clamping rod 536 is inserted into the clamping groove 538, the clamping rod 532 is in a vertical state. The extrusion plate 534 is connected with the clamping rod 536 through a connecting piece 539. The extrusion plate 534 can drive the clamping rod 536 to be separated from the clamping rod 532.

[0049] With reference to Figure 4 、 Figure 7The connecting piece 539 of the embodiment comprises an intermediate connecting rod 5391, the bottom rod 531 is provided with a sliding groove 5392, the opening of the sliding groove 5392 is located on the side wall of the bottom rod 531 where the clamping rod 536 is located, the side wall of the sliding groove 5392 is provided with an opening penetrating to the top wall of the bottom rod 531, the opening is located below the extrusion plate 534, the intermediate connecting rod 5391 is slidingly arranged in the sliding groove 5392, one end of the connecting rod 52 is bent and extends out of the opening to below the extrusion plate 534, the other end of the intermediate connecting rod 5391 extends to the clamping rod 536, the end of the intermediate connecting rod 5391 extending to below the extrusion plate 534 is provided with a guide surface 5393, the guide surface 5393 is inclined downward from the top of the intermediate connecting rod 5391, the extrusion plate 534 extrudes and slides the guide surface 5393, at this time, the intermediate connecting rod 5391 slides toward the opening direction of the sliding groove 5392, at this time, the intermediate connecting rod 5391 rotates.

[0050] When clamping the connecting steel bars 3, first, one end of the connecting rod 52 is inserted toward the direction of the connecting steel bars 3, then the bottom rod 531 and the clamping rods 532 are located below the connecting steel bars 3, then the clamping rods 532 are passed around the connecting steel bars 3, so that the bottom rod 531 is located directly below the connecting steel bars 3, then the connecting rod 52 is lifted up, so that the connecting steel bars 3 are located between the clamping rods 532 and the connecting rod 52, then the connecting rod 52 is continuously lifted up, the connecting steel bars 3 extrude the extrusion plate 534, the extrusion plate 534 slides toward the direction of the bottom rod 531, the extrusion plate 534 slides along the guide surface 5393 and pushes the intermediate connecting rod 5391 to slide toward the opening direction of the sliding groove 5392, the intermediate connecting rod 5391 pushes the clamping rod 536 to rotate, the free end of the clamping rod 536 rotates out of the clamping groove 538, so that the clamping rod 536 is released from the limitation of the clamping rod 532, the clamping rod 532 rotates toward the connecting rod 52 under the action of the first torsional spring 5332, so that the connecting steel bars 3 can be clamped, in this process, the operator does not need to use additional tools for operation, so that the convenience of clamping the connecting steel bars 3 is improved.

[0051] Referring to Figure 5The fastener 54 in the embodiment comprises a fastening screw 541 and a fastening block 542, the connecting rod 52 is provided with a fixing groove 543 arranged along the length direction of the connecting rod 52, the fastening screw 541 is inserted into the fixing groove 543 and rotationally connected with the connecting rod 52, the top of the fastening screw 541 penetrates through the top wall of the connecting rod 52, the fastening block 542 is slidingly arranged in the fixing groove 543 and abuts against the groove wall of the fixing groove 543, the fastening screw 541 penetrates through the fastening block 542 and is threadedly connected with the fastening block 542, the free end of the clamping rod 532 is provided with a clearance groove 5321, the clamping rod 532 can be inserted into the fixing groove 543, when the clamping rod 532 is inserted into the fixing groove 543, the fastening screw 541 is inserted into the clearance groove 5321, initially, the fastening block 542 is located above the clamping rod 532, and each connecting rod 52 is threadedly sleeved with a fastening nut 55 on one side penetrating through the support rod 51.

[0052] When the clamping rod 532 rotates towards the connecting rod 52, the clamping rod 532 is inserted into the fixing groove 543, then the fastening screw 541 is rotated, the fastening screw 541 drives the fastening block 542 to slide towards the clamping rod 532, the fastening block 542 extrudes the clamping rod 532 towards the connecting steel bar 3, the clamping rod 532 clamps the connecting steel bar 3 on the connecting rod 52 and the bottom rod 531, thereby completing the fixing of the connecting steel bar 3, then the fastening nut 55 is rotated, the fastening nut 55 pushes the support rod 51 and the steel bars of the upper steel bar mesh 21 to abut tightly, then the support rod 51 is bound on the upper steel bar mesh 21 by lashing wire, so that the adjacent two connecting steel bars 3 can be connected together, the connection strength of the connecting steel bar 3 and the prefabricated slab steel bar cage 2 is improved, and then the connection strength between the beam steel bar cage 1 and the prefabricated slab steel bar cage 2 is improved.

[0053] The implementation principle of the prefabricated underground engineering steel bar cage hierarchical assembly structure in the embodiment is that, when the slab steel bar cage is installed, the upper steel bar mesh 21 and the lower steel bar mesh 22 are assembled into the prefabricated slab steel bar cage 2 in the factory through the connecting rib 23, then the prefabricated slab steel bar cage 2 is hoisted onto the beam steel bar cage 1, so that the lap rod 24 is lapped on the beam steel bar cage 1, then the connecting steel bar 3 is inserted into the beam steel bar cage 1 from the sliding connection unit 4, and is bound by lashing wire, then the adjacent two connecting steel bars 3 are connected through the connecting fixing unit 5, thereby completing the installation of the prefabricated slab steel bar cage 2, compared with the construction of the traditional slab steel bar cage, the prefabricated slab steel bar cage 2 can reduce the slab steel bar cage installation time, thereby improving the construction efficiency of the whole project.

[0054] On the other hand, the embodiment of the application also discloses a prefabricated underground engineering steel bar cage hierarchical connection method.

[0055] A reinforcing cage grading connection method of fabricated underground engineering, using the reinforcing cage grading assembly structure of fabricated underground engineering, comprising the following steps:

[0056] S1, determine the length of the prefabricated plate reinforcing cage 2, the diameter and distance of the corner longitudinal reinforcement and stirrup, the prefabricated plate reinforcing cage 2 produced by the factory according to different characteristics;

[0057] S2, after hoisting to the working position, first lap the lap rod 24 on the beam reinforcing cage 1, then pull out the connecting steel bars 3 from the prefabricated plate reinforcing cage 2, and tie them on the beam reinforcing cage 1 by tying the wire.

[0058] S3, then fix the two ends of the two connecting steel bars 3 of different sliding directions by the connecting and fixing unit 5, and then tie the connecting and fixing unit 5 on the upper steel mesh 21 by tying the wire.

[0059] In step S1, the length and width of the steel bars in the prefabricated plate reinforcing cage 2 need to be designed according to the spacing between the set positions of the reinforcing cage, and then 0.5 same direction steel bar spacing is left in the middle.

[0060] In step S2, the hoisting of the prefabricated plate reinforcing cage 2 can be hoisted by a large crane, or a support can be built to slide the prefabricated plate reinforcing cage 2 onto the beam reinforcing cage 1, and the lap rod 24 is longer than 1.5 times the width of the beam reinforcing cage 1, and at the same time, it is not less than 1.5 times the same direction spacing of the steel bars of the prefabricated plate reinforcing cage 2.

[0061] In step S3, when pulling out the connecting steel bars 3, it should be operated from both sides to the middle, and the connecting steel bars 3 are pulled out while being tied.

[0062] The above are the preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A graded assembly structure for a prefabricated underground engineering reinforcement cage, comprising a beam reinforcement cage (1), characterized in that: It also includes a precast slab reinforcement cage (2), the beam reinforcement cage (1) is set on both sides of the precast slab reinforcement cage (2), the precast slab reinforcement cage (2) includes an upper reinforcement mesh (21), a lower reinforcement mesh (22) and a connecting bar (23), one end of the connecting bar (23) is tied to the upper reinforcement mesh (21) by tie wire, and the other end is tied to the lower reinforcement mesh (22) by tie wire, the upper reinforcement mesh (21) is provided with an lap rod (24), the lap rod (24) is used to lap on the beam reinforcement cage (1) which is arranged opposite to it, the lower reinforcement mesh (22) is provided with a connecting bar (3), the connecting bar (3) is connected to the lower reinforcement mesh (22) by a sliding connection unit (4), the connecting bar (3) can be inserted into the beam reinforcement cage (1) which is arranged opposite to it, and two adjacent connecting bars (3) with different sliding directions are connected by a connection fixing unit (5); The connecting and fixing unit (5) includes a support rod (51), two connecting rods (52) and two clamping members (53). The two connecting rods (52) are respectively disposed at both ends of the support rod (51). The support rod (51) is tied to the upper steel mesh (21) by tie wire. The clamping members (53) are disposed on the connecting rods (52) and correspond one-to-one with the connecting rods (52). The two clamping members (53) correspond to the two connecting steel bars (3) with different sliding directions. The clamping members (53) are used to clamp the ends of the connecting steel bars (3). Each connecting rod (52) is provided with a fastener (54). The fastener (54) is used to clamp and fix the connecting steel bar (3) with the clamping member (53).

2. The graded assembly structure of the reinforcing cage for prefabricated underground engineering according to claim 1, characterized in that: The sliding connection unit (4) includes a connecting sleeve (41), which is tied to the lower steel mesh (22) by a tie wire. The connecting steel bar (3) passes through the connecting sleeve (41) and is slidably disposed with the connecting sleeve (41).

3. The graded assembly structure of the reinforcing cage for prefabricated underground engineering according to claim 1, characterized in that: The clamping member (53) includes a bottom rod (531) and a clamping rod (532). The bottom rod (531) is disposed on the connecting rod (52). The bottom rod (531) can move to the side of the connecting steel bar (3) away from the upper steel mesh (21). The clamping rod (532) is rotatably disposed on the side of the bottom rod (531) away from the connecting rod (52). The clamping rod (532) can rotate toward the connecting rod (52) so that the clamping rod (532) moves to the side of the connecting steel bar (3) away from the bottom rod (531).

4. The graded assembly structure of the reinforcing cage for prefabricated underground engineering according to claim 3, characterized in that: The bottom rod (531) is provided with an extrusion plate (534) for the connecting steel bar (3) to be extruded. The bottom rod (531) is provided with a clamping rod (536), which is used to restrict the rotation of the clamping rod (532). The extrusion plate (534) and the clamping rod (536) are connected by a connector (539). The extrusion plate (534) can drive the clamping rod (536) to disengage from the clamping rod (532).

5. The graded assembly structure of the reinforcing cage for prefabricated underground engineering according to claim 4, characterized in that: The connector (539) includes an intermediate connecting rod (5391), the locking rod (536) is rotatably disposed with the bottom rod (531), the rotation direction of the locking rod (536) is perpendicular to the rotation direction of the clamping rod (532), the intermediate connecting rod (5391) is slidably disposed on the bottom rod (531), a support spring (535) is provided between the extrusion plate (534) and the bottom rod (531), the intermediate connecting rod (5391) can push the locking rod (536) to disengage from the clamping rod (532), a guide surface (5393) is provided on the intermediate connecting rod (5391), the extrusion plate (534) can slide along the guide surface (5393) and push the intermediate connecting rod (5391) to slide.

6. The graded assembly structure of the reinforcing cage for prefabricated underground engineering according to claim 3, characterized in that: The fastener (54) includes a fastening screw (541) and a fastening block (542). The connecting rod (52) is provided with a fixing groove (543). The fastening screw (541) is inserted into the fixing groove (543) and rotatably connected to the connecting rod (52). The fastening block (542) is slidably disposed in the fixing groove (543). The fastening screw (541) passes through the fastening block (542) and is threadedly connected to the fastening block (542). The clamping rod (532) can be inserted into the fixing groove (543). The fastening block (542) can press the clamping rod (532) towards the bottom rod (531).

7. The graded assembly structure of the reinforcing cage for prefabricated underground engineering according to claim 1, characterized in that: The connecting rod (52) passes through the support rod (51) and is slidably disposed therein. A fastening nut (55) is threaded on the side of the connecting rod (52) that passes through the support rod (51).

8. The graded assembly structure of the reinforcing cage for prefabricated underground engineering according to claim 1, characterized in that: The connecting steel bar (3) is inserted into the beam steel cage (1) at one end with a hook (31).

9. A method for graded connection of reinforcing cages in prefabricated underground engineering, using the graded assembly structure of reinforcing cages for prefabricated underground engineering as described in any one of claims 1-8, characterized in that: Includes the following steps: S1. Determine the length, diameter and distance of the corner longitudinal bars and stirrups of the precast slab reinforcement cage (2). The factory produces the precast slab reinforcement cage (2) according to different characteristics. S2. After hoisting to the work position, first lap the splice rod (24) onto the beam reinforcement cage (1), and then pull out the connecting steel bar (3) from the precast slab reinforcement cage (2) and tie it to the beam reinforcement cage (1) with tie wire. S3. Then, the two ends of the two connecting steel bars (3) with different sliding directions are fixed by the connecting fixing unit (5), and then the connecting fixing unit (5) is tied to the upper steel mesh (21) by the tie wire.

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