Support-free fabricated construction method for cantilever terrace

Abstract

The invention discloses a non-support assembly type construction method for a cantilever terrace, and belongs to the technical field of building construction structures. The method comprises the following steps: S1, preparing a group of fully-prefabricated cantilever beams, laminated beams and laminated slabs; s2, an anchoring box is pre-buried in the position, opposite to the cantilever beam, of the designed cast-in-place structural beam, a cast-in-place structural beam water stop belt is installed, and then the cast-in-place structural beam and the wall body are integrally poured; s3, after the beam body and the wall surface to be poured reach the strength; hoisting the fully-prefabricated cantilever beam, anchoring and locking the beam end anchoring connecting piece in the anchoring box, and then grouting inwards; s4, a TL stress support is installed, and a formwork stress platform is formed by the TL stress support and the fully-prefabricated cantilever beam; s5, the laminated beam and the laminated slab are hoisted; s6, a terrace body is poured; when the concrete reaches the design strength, the TL stress support is dismantled for turnover; performing sealing waterproof treatment; s7, second-section construction is conducted on the upper portion of the formed cantilever terrace; the construction efficiency of the cantilever terrace can be greatly improved; the time cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of building construction structures, and in particular to a bracket-free assembled construction method for a cantilevered terrace. Background Art

[0002] With the large-scale development of the fourth generation of ecological human settlements, large cantilever terraces have become an important part of building construction. At present, most large cantilever terraces are cast-in-place. In the construction of staggered terraces, the formwork support frame system faces problems such as too high frame, complex coordinated erection of formwork frames on the same layer, and high turnover costs. The construction efficiency is low and it is easy to cause quality problems such as cracking and water leakage of the terrace, which urgently needs to be improved; the patent document with the application number 2019107387319 currently published in China: "A prefabricated cantilever beam balcony and construction method" discloses a prefabricated integral cantilever balcony and a structure corresponding to the structure, but in its technical solution, the hoisting operability of the prefabricated integral cantilever balcony is still poor, there is a high safety risk, and the balcony and the sealing beam are difficult to operate during the connection process, and the work efficiency is low; and this is also the main purpose of proposing this application. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a bracket-free assembled construction method for a cantilever terrace, so as to greatly improve the construction efficiency of the cantilever terrace, control costs while ensuring the construction quality of the terrace, improve operational convenience, and ensure construction period and safety.

[0004] To solve the above problems, the present invention provides the following technical solutions: A cantilever terrace non-bracket assembly construction method; the method comprises the following steps: S1. Prepare a set of fully prefabricated cantilever beams, composite beams and composite slabs; wherein the fully prefabricated cantilever beams include structural beams, cantilever beam water stop strips and beam end anchor connectors; S2, pre-embed the anchor box on the designed cast-in-place structural beam at a position opposite to the cantilever beam, and install the cast-in-place structural beam water stop, and then cast the cast-in-place structural beam and wall in one piece; the rear end of the anchor box is connected to the frame beam steel bar in the parallel direction of the prefabricated cantilever beam, the front end can be clamped with the beam end anchor connector, and the remaining outer peripheral sides of the anchor box are connected to the steel bars of the beam or wall on the house body located around the anchor box; S3, after the wall and beam body around the anchor box in step S2 have reached the required strength, hoist the fully prefabricated cantilever beam, so that the beam end anchor connector is directly opposite to the front end of the anchor box, push the tail end of the beam end anchor connector into the anchor box, and anchor and lock the beam end anchor connector in the anchor box to complete the installation of the fully prefabricated cantilever beam; S4. After a set of fully prefabricated cantilever beams are installed, TL load-bearing brackets are installed between the fully prefabricated cantilever beams, so that the TL load-bearing brackets and the fully prefabricated cantilever beams form a template load-bearing platform; S5. Hoist the composite beams and composite slabs, and install them on the formwork force-bearing platform accordingly, tie the upper steel bars of the composite beams and composite slabs, and connect the steel bars with the fully prefabricated cantilever beams; S6, pouring concrete on the upper part of the composite slab; when the concrete reaches the designed strength, dismantling the TL load-bearing support for turnover; thereafter, grouting is injected into the anchor box, and the gap between the anchor box and the fully prefabricated cantilever beam is sealed and waterproofed; S7. Carry out two-stage construction on the upper part of the formed cantilevered terrace.

[0005] Preferably, the beam end anchor connector includes a clamp arranged at the tail of the structural beam body; an anchor ring is arranged on the outer end face of the clamp; the beam end anchor connector is connected to the anchor box through the anchor ring; a plurality of steel bars are arranged in the structural beam body; one end of the steel bar is inserted into the clamp and connected to the anchor ring.

[0006] Furthermore, the clamping head is a steel C-shaped clamping plate structure, the inner side of the U-shaped clamping plate is fixedly clamped on the tail end of the structural beam body to form an integrated structure with the structural beam body, and the height of the U-shaped clamping plate is consistent with the thickness of the structural beam body.

[0007] Preferably, the anchor box is a box structure with an open front end and a hollow interior; the beam end anchor connector can be inserted into its inner cavity from the front end of the anchor box; an anchor ring is provided on the rear end face in the inner cavity of the anchor box; the anchor box is connected to the beam end anchor connector through the anchor ring; one end of the steel bar of the frame beam is connected to the back side of the anchor box and the position opposite to the anchor ring in its inner cavity.

[0008] Furthermore, the anchoring rings on the beam end anchor connector and the anchor box are both U-shaped ring structures, and a sleeve is provided at the open end of the anchoring ring; one end of the sleeve can be directly connected to the steel bar, or it can be installed on the conversion cylinder first and then connected to the steel bar; the conversion cylinder includes a screw section that cooperates with the sleeve on the anchoring ring; at the other end of the screw section, a plurality of threaded sleeve sections for connecting the steel bar are provided through a flat plate.

[0009] Furthermore, there are no less than two groups of anchor rings arranged in the anchor box, and each group includes at least two anchor rings that are cantilevered and horizontally opposite to each other; the number of groups of anchor rings arranged on the beam end anchor connector is consistent with the number of groups of anchor rings in the anchor box; the anchor rings on the beam end anchor connector can be inserted into the gap between the upper and lower anchor rings in the anchor box; a T-pin is placed above each group of anchor rings in the anchor box, and a slider is placed between the upper and lower anchor rings of each group; the bottom of the T-pin is placed on the slider; when the anchor ring on the beam end anchor connector is inserted into the gap between the upper and lower anchor rings in the anchor box, the slider can be pushed toward the back plate side of the inner cavity of the anchor box, and the T-pin can fall to the middle of the anchor rings on the beam end anchor connector and the anchor box where they intersect to complete the locking of the two.

[0010] Preferably, before pushing the beam end anchor connector into the anchor box in step S3, it is necessary to first clean the inside of the anchor box and apply lubricating oil to the bottom of the C-shaped clip structure.

[0011] Preferably, the number of TL load-bearing supports is not less than two, and each TL load-bearing support is evenly installed on the fully prefabricated cantilever beam; a single TL load-bearing support includes two T-frames respectively arranged on the opposite end sides of the fully prefabricated cantilever beam, and the T-frame is installed inverted so that the vertical rod in the middle is arranged upward; a horizontal hook rod is arranged on the upper top of the T-frame; one end of the hook rod is placed on the top surface of the fully prefabricated cantilever beam, and a main keel is connected between the bottoms of the T-frames; the composite beam and the composite plate are arranged above the main keel.

[0012] Preferably, plate tie bars are provided on the fully prefabricated cantilever beam; the upper steel bars of the composite plate and the composite beam are connected via the plate tie bars.

[0013] Preferably, when pouring concrete in step S6, the concrete is poured gradually in a direction from the extended end to the anchoring end of the fully prefabricated cantilever beam.

[0014] The beneficial effects of the present invention are embodied in the following aspects: 1. Reduce the difficulty of template construction at the cantilevered terrace, make the main template regular, improve the efficiency of main structure construction, and at the same time, the terrace adopts prefabrication and interlaced construction, which does not occupy the key line construction period; 2. The beam end anchoring device is simple, reliable, and easy to install. It does not change the stress form of the structural design. It uses a fully prefabricated beam body with a beam end anchoring device, a pre-buried anchor box, and a TL stress frame system to form a composite beam and plate working platform. It only needs to set up a worker operating frame, and there is no need to set up a formwork support frame, which has high construction efficiency; 3. Make full use of the cantilever beam strength of the terrace itself and construct the bottom structure and upper structure of the terrace in two stages to ensure safety and improve the construction quality of the terrace; 4. There is basically no leakage or cracks on the terrace, and the cost of repair is extremely low. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure after the cantilever terrace is poured using the device in this embodiment; Figure 2 Yes Figure 1 A schematic diagram of the three-dimensional structure of the device in another viewing angle; Figure 3 It is a schematic diagram of the case where the cast-in-place structural beam is cast in step S3 of this embodiment and corresponding structures such as fully prefabricated cantilever beams, composite beams and composite slabs are installed; Figure 4 yes Figure 3 A schematic diagram of the three-dimensional structure of the device in another viewing angle; Figure 5 is a schematic diagram of the three-dimensional structure of the structural beam body, the beam end anchor connector and the anchor box in the present embodiment when they are in a connected state; Figure 6 is a schematic diagram of a three-dimensional structure in which the beam end anchor connector and the anchor box are in a separated state in this embodiment; Figure 7 yes Figure 6 A schematic diagram of the three-dimensional structure of the device in another viewing angle; Figure 8 It is a three-dimensional structural schematic diagram of the embodiment of the present invention when the structural beam body is connected to the beam end anchoring connector, the conversion cylinder is installed in the sleeve of the anchor box, and the beam end anchoring connector is connected to the anchor box; Fig. 9 is a schematic diagram of the three-dimensional structure when the fully prefabricated cantilever beam is hoisted to be opposite to the anchor box pre-buried on the cast-in-place structural beam in this embodiment; Fig.10 is a partial cross-sectional view of the connection position between the beam end anchor connector and the anchor box in this embodiment; Explanation of the accompanying drawings: 1. Fully prefabricated cantilever beam, 2. Composite beam, 3. Composite plate, 4. Structural beam body, 5. Cantilever waterstop, 6. Beam end anchor connector, 7. Anchor box, 8. Cast-in-place structural beam waterstop, 9. TL load support, 10. Clamp, 11. Anchor ring, 12. Sleeve, 13. Conversion cylinder, 14. T-pin, 15. Slider, 16. Cast-in-place structural beam, 17. Reinforcement rod. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments: Example: Reference Figure 1 This embodiment provides a cantilever terrace bracket-free assembly construction method; it includes the following steps: S1. Prepare a set of fully prefabricated cantilever beams 1, composite beams 2 and composite plates 3; wherein the fully prefabricated cantilever beam 1 includes a structural beam body 4, a cantilever beam waterstop 5 and a beam end anchor connector 6; there are two fully prefabricated cantilever beams in a set in this embodiment, which correspond to the two sides of the designed cast-in-place structural beam; the cantilever beam waterstop is arranged on the opposite end faces of the two fully prefabricated cantilever beams; S2, pre-embed the anchor box 7 in the designed cast-in-place structural beam at a position opposite to the cantilever beam, and install the cast-in-place structural beam water stop 8, and then cast the cast-in-place structural beam 16 and the wall in one piece; the rear end of the anchor box 7 is connected to the frame beam steel bar in the parallel direction of the prefabricated cantilever beam, and the front end can be snapped with the beam end anchor connector 6, and the remaining outer peripheral sides of the anchor box 7 are all connected to the steel bars of the beam or wall on the house body located around the anchor box 7; in this embodiment, the cast-in-place structural beam water stop is arranged on the outer end face; in this embodiment, the cast-in-place structural beam is used to provide support for the prefabricated cantilever beam; S3, after the wall and beam body around the anchor box 7 in step S2 have reached the required strength, the fully prefabricated cantilever beam 1 is hoisted, so that the beam end anchor connector 6 is arranged opposite to the front end of the anchor box 7, the tail end of the beam end anchor connector 6 is pushed into the anchor box 7, and the beam end anchor connector 6 is anchored and locked in the anchor box 7, thus completing the installation of the fully prefabricated cantilever beam 1; S4. After a set of fully prefabricated cantilever beams 1 are installed, TL load-bearing brackets 9 are installed between the fully prefabricated cantilever beams 1, so that the TL load-bearing brackets 9 and the fully prefabricated cantilever beams 1 form a template load-bearing platform; at the same time, the water stop strips are arranged; if the negative reinforcement of the plate is not pre-embedded on the side of the fully prefabricated cantilever beam, it is necessary to add the step of embedding reinforcement on the side of the prefabricated beam in this step. S5. Hoist the composite beam 2 and the composite plate 3, and install the composite beam 2 and the composite plate 3 correspondingly on the formwork force platform, tie the upper steel bars of the composite beam 2 and the composite plate 3, and connect the steel bars to the fully prefabricated cantilever beam 1; in this embodiment, a plurality of reinforced corrugated plates are also provided at the lower part of the composite plate.

[0017] S6, pouring concrete on the upper part of the composite slab 3; when the concrete reaches the designed strength, the TL load-bearing support is removed for turnover; thereafter, grouting is injected into the anchor box, and the gap between the anchor box 7 and the fully prefabricated cantilever beam 1 is filled and waterproofed; S7. Carry out two-stage construction on the upper part of the formed cantilevered terrace.

[0018] The beam end anchor connector 6 includes a clamp 10 arranged at the tail of the structural beam body 4; an anchor ring 11 is arranged on the outer end face of the clamp 10; the beam end anchor connector 6 is connected to the anchor box 7 through the anchor ring 7; a plurality of steel bars are arranged in the structural beam body 4; one end of the steel bar is inserted into the clamp and connected to the anchor ring 11.

[0019] The clamping head 10 is a steel C-shaped clamping plate structure. The inner side of the U-shaped clamping plate is fixedly clamped on the tail end of the structural beam body to form an integrated structure with the structural beam body, and the height of the U-shaped clamping plate is consistent with the thickness of the structural beam body 4.

[0020] The anchor box 7 is a box structure with an open front end and a hollow interior; the beam end anchor connector 6 can be inserted into the inner cavity of the anchor box 7 from the front end; an anchor ring 11 is provided on the rear end surface in the inner cavity of the anchor box 7; the anchor box 7 is connected to the beam end anchor connector 6 through the anchor ring 11; one end of the steel bar of the frame beam is connected to the back side of the anchor box 7 and the position opposite to the anchor ring 11 in the inner cavity. The wall and beam body steel bars around the anchor box in this embodiment can be welded or mechanically connected using sleeves according to the seismic requirements.

[0021] The anchor ring 11 on the beam end anchor connector 6 and the anchor box 7 is a U-shaped ring structure, and a sleeve 12 is provided at the open end of the anchor ring 11; one end of the sleeve 12 can be directly connected to the steel bar, or it can be installed on the conversion cylinder 13 first and then connected to the steel bar; the conversion cylinder 13 includes a screw section that matches the sleeve 12 on the anchor ring 11; at the other end of the screw section, a number of threaded sleeve sections for connecting the steel bar are provided through a flat plate. When there are multiple rows of structural beam body steel bars or frame beam steel bars, it can be considered to use a conversion cylinder to concentrate the force conversion of multiple steel bars and then connect them to the anchor ring on the anchor box through a sleeve, so as to achieve the effect of optimizing the force.

[0022] There are no less than two groups of anchor rings 11 arranged in the anchor box 7, and each group includes at least two cantilevered anchor rings 11 corresponding to the upper and lower horizontal positions; the number of groups of anchor rings 11 arranged on the beam end anchor connector 6 is consistent with the number of groups of anchor rings 11 in the anchor box 7; the anchor rings 11 on the beam end anchor connector 6 can be inserted into the gap between the upper and lower anchor rings 11 in the anchor box 7; a T-shaped anchor ring is placed above each group of anchor rings 11 in the anchor box 7. Pin 14, a slider 15 is placed between the upper and lower anchor rings 11 of each group; the bottom of the T-pin 14 is placed on the slider 15; when the anchor ring 11 on the beam end anchor connector 6 is inserted into the gap between the upper and lower anchor rings 11 in the anchor box 7, the slider 15 can be pushed toward the back plate side of the inner cavity of the anchor box 7, and the T-pin 14 can fall to the middle of the anchor ring 11 on the beam end anchor connector 6 and the anchor box 7 where they intersect to complete the locking of the two. In this embodiment, there are 4 groups of anchor rings 11 in the anchor box 7, and these anchor rings are symmetrically distributed on the anchor box; the T-pin 14 and the slider used to lock the beam end anchor connector 6 and the anchor box 7 are installed from the front side of the anchor box 7 after the casting of the cast-in-place structural beams and walls is completed in step S2, so as to avoid interference with the T-pin 14 and the slider 15 placed on the anchor ring when pouring concrete.

[0023] refer to Figure 6 In the present embodiment, a reinforcing rod 17 is also provided in the inner cavity of the anchor box 7. The reinforcing rod 17 is provided along the length direction of the cast-in-place structural beam. The reinforcing rod 17 is used to improve the structural strength of the anchor box position.

[0024] Before pushing the beam end anchor connector 6 into the anchor box 7 in step S3, it is necessary to first clean the inside of the anchor box and apply lubricating oil to the bottom of the C-shaped clip structure.

[0025] The number of TL load-bearing brackets 9 is not less than two, and each TL load-bearing bracket 9 is evenly installed on the fully prefabricated cantilever beam 1; a single TL load-bearing bracket 9 includes two T-shaped frames respectively arranged on the opposite side surfaces of the fully prefabricated cantilever beam 1, and the T-shaped frame is installed inverted so that the vertical rod in the middle is arranged upward; a horizontal hook rod is arranged on the upper top of the T-shaped frame; one end of the hook rod is placed on the top surface of the fully prefabricated cantilever beam 1, and a main keel is connected between the bottoms of the T-shaped frames; the composite beam 2 and the composite plate 3 are arranged above the main keel. I-beams and wooden squares are also arranged on the TL load-bearing bracket.

[0026] Plate tie steel bars are provided on the fully prefabricated cantilever beam 1; the upper steel bars of the composite plate 3 and the composite beam 2 are connected via the plate tie steel bars.

[0027] When pouring concrete in step S6, the concrete is poured step by step in the direction from the extended end to the anchoring end of the fully prefabricated cantilever beam 1.

[0028] The following will calculate and compare the labor hours of three construction modes: conventional cast-in-place cantilever terrace, integral prefabricated terrace used in the background technology, and prefabricated beams used in this embodiment, and cast-in-place terrace body; 1. Use cast-in-place cantilever terrace construction: Erection and dismantling of formwork: 24-32 working hours; Formwork erection and dismantling: 20-24 working hours; Steel bar binding construction: 24-32 working hours; Concrete pouring: 12-16 hours; Defect repair and finishing: 6-8 working hours; Total 112 working hours; 2. Use overall prefabricated terrace construction: Formwork erection and dismantling: 24-32 man-hours; Butt joint construction between prefabricated terrace and sealing beam: 4-6 working hours; Grouting construction: 6-8 hours; Waterproofing: 6-8 hours; Total 54 working hours; 3. Use the construction method in this embodiment: Erection and dismantling of operating frame: 1-2 working hours; Docking construction: 1-2 hours; TL load-bearing bracket installation and removal: 1-2 working hours Composite beam and slab hoisting, reinforcement construction, concrete pouring: 6-8 hours; Waterproofing: 1-2 hours; After the installation of the fully prefabricated cantilever beam and socket is completed, the composite beam and slab reinforcement pouring can be carried out, and the grouting construction does not occupy the key construction line; Total 16 working hours; It can be seen from the above that when the construction means in the present application are used to construct the terrace, the construction efficiency can be greatly improved. Since the TL load-bearing support used to cooperate with the casting of the terrace main body in the present invention does not require additional formwork, its overall disassembly and assembly are convenient, and it can be quickly turned over after the terrace is cast. At the same time, during hoisting, only the fully prefabricated cantilever beams need to be hoisted one by one, and the difficulty of hoisting and the time for docking with the cast-in-place structural beams are also greatly reduced.

Claims

1. A cantilever terrace non-bracket assembly construction method, characterized by: It includes the following steps: S1. Prepare a set of fully prefabricated cantilever beams (1), composite beams (2) and composite plates (3); wherein the fully prefabricated cantilever beams (1) include a structural beam body (4), a cantilever beam water stop (5) and a beam end anchor connector (6); S2, pre-embed the anchor box (7) on the designed cast-in-place structural beam (16) at a position opposite to the cantilever beam, and install the water stop strip (8) of the cast-in-place structural beam (16), and then cast the cast-in-place structural beam (16) and the wall in one piece; the rear end of the anchor box (7) is connected to the steel bars of the frame beam in a direction parallel to the prefabricated cantilever beam, the front end can be snap-connected with the beam end anchor connector (6), and the remaining outer peripheral sides of the anchor box (7) are all connected to the steel bars of the beam or wall on the house body located around the anchor box (7); S3, after the wall and beam body around the anchor box (7) in step S2 have reached a certain strength, the fully prefabricated cantilever beam (1) is hoisted so that the beam end anchor connector (6) is directly opposite to the front end of the anchor box (7), the rear end of the beam end anchor connector (6) is pushed into the anchor box (7), and the beam end anchor connector (6) is anchored and locked in the anchor box (7), thereby completing the installation of the fully prefabricated cantilever beam (1); S4, after a set of fully prefabricated cantilever beams (1) are installed, a TL load-bearing bracket (9) is installed between the fully prefabricated cantilever beams (1), so that the TL load-bearing bracket (9) and the fully prefabricated cantilever beams (1) form a template load-bearing platform; S5, hoisting the composite beam (2) and the composite plate (3), and installing the composite beam (2) and the composite plate (3) on the formwork force-bearing platform respectively, tying the upper steel bars of the composite beam (2) and the composite plate (3), and connecting the steel bars to the fully prefabricated cantilever beam (1); S6, pouring concrete on the upper part of the composite slab (3); when the concrete reaches the designed strength, removing the TL load-bearing support for turnover; thereafter, grouting is injected into the anchor box (7), and the gap between the anchor box (7) and the fully prefabricated cantilever beam (1) is sealed and waterproofed; S7. Carry out two-stage construction on the upper part of the formed cantilevered terrace.

2. A cantilever terrace non-bracket assembly construction method according to claim 1, characterized in that: The beam end anchor connector (6) comprises a clamp (10) arranged at the tail of the structural beam body (4); an anchor ring (11) is arranged on the outer end surface of the clamp (10); the beam end anchor connector (6) is connected to the anchor box (7) via the anchor ring (11); a plurality of steel bars are arranged in the structural beam body (4); one end of the steel bar is inserted into the clamp and connected to the anchor ring (11).

3. The method for constructing a cantilevered terrace without a support frame according to claim 2, characterized in that: The clamping head (10) is a steel C-shaped clamping plate structure, the inner side of the U-shaped clamping plate is fixedly clamped to the rear end of the structural beam body to form an integrated structure with the structural beam body (4), and the height of the U-shaped clamping plate is consistent with the thickness of the structural beam body (4).

4. The method for constructing a cantilevered terrace without a support frame according to claim 1, characterized in that: The anchor box (7) is a box structure with an open front end and a hollow interior; the beam end anchor connector (6) can be inserted into the inner cavity of the anchor box (7) from the front end; an anchor ring (11) is provided on the rear end surface in the inner cavity of the anchor box (7); the anchor box (7) is connected to the beam end anchor connector (6) via the anchor ring (11); one end of the steel bar of the frame beam is connected to the back side of the anchor box (7) and a position opposite to the anchor ring (11) in the inner cavity of the anchor box (7).

5. A cantilever terrace bracket-free assembly construction method according to claim 2 or 4, characterized in that: The anchor ring (11) on the beam end anchor connector (6) and the anchor box (7) are both U-shaped ring structures, and a sleeve (12) is arranged at the open end of the anchor ring (11); one end of the sleeve (12) can be directly connected to the steel bar, or can be installed on a conversion cylinder (13) and then connected to the steel bar; the conversion cylinder (13) includes a screw section that matches the sleeve (12) on the anchor ring (11); and a plurality of threaded sleeve sections for connecting to the steel bar are arranged at the other end of the screw section through a flat plate.

6. The method for constructing a cantilevered terrace without a support frame according to claim 5, characterized in that: There are at least two groups of anchor rings (11) arranged in the anchor box (7), and each group includes at least two anchor rings (11) that are cantilevered and horizontally opposed to each other. The number of groups of anchor rings (11) arranged on the beam end anchor connector (6) is consistent with the number of groups of anchor rings (11) in the anchor box (7); The anchor ring (11) on the beam end anchor connector (6) can be inserted into the gap between the upper and lower anchor rings (11) in the anchor box (7); a T-pin (14) is placed above each group of anchor rings (11) in the anchor box (7), and a slider (15) is placed between the upper and lower anchor rings (11) of each group; the bottom of the T-pin (14) is placed on the slider (15); when the anchor ring (11) on the beam end anchor connector (6) is inserted into the gap between the upper and lower anchor rings (11) in the anchor box (7), the slider (15) can be pushed toward the back plate side of the inner cavity of the anchor box (7); when the slider (17) is pushed to the back of the inner cavity of the anchor box (7), the T-pin (14) just falls to the middle of the intersecting anchor rings (11) on the beam end anchor connector (6) and the anchor box (7) to complete the locking of the two.

7. The method for constructing a cantilevered terrace without a support frame according to claim 1, characterized in that: Before pushing the beam end anchor connector (6) into the anchor box (7) in step S3, it is necessary to first clean the interior of the anchor box (7) and apply lubricating oil to the bottom of the C-shaped cardboard structure.

8. The method for assembling a cantilevered terrace without a support according to claim 1, characterized in that: The number of TL load-bearing brackets (9) is not less than two, and each TL load-bearing bracket (9) is evenly installed on the fully prefabricated cantilever beam (1); a single TL load-bearing bracket (9) comprises two T-shaped frames respectively arranged on the opposite end sides of the fully prefabricated cantilever beam (1), and the T-shaped frames are installed inverted so that the vertical rod in the middle is arranged upward; a horizontal hook rod is arranged on the upper top of the T-shaped frame; one end of the hook rod is placed on the top surface of the fully prefabricated cantilever beam (1), and a main keel is connected between the bottoms of the T-shaped frames; the composite beam (2) and the composite plate (3) are arranged above the main keel.

9. The method for constructing a cantilevered terrace without a support frame according to claim 1, characterized in that: A plate tie steel bar is provided on the fully prefabricated cantilever beam (1); the upper steel bars of the composite plate (3) and the composite beam (2) are connected via the plate tie steel bar.

10. The method for constructing a cantilevered terrace without a support frame according to claim 1, characterized in that: When pouring concrete in step S6, the concrete is poured step by step in the direction from the extended end to the anchoring end of the fully prefabricated cantilever beam (1).

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