Prefabricated component assembled suspension water channel and construction method thereof

Abstract

The application discloses a prefabricated component assembled suspension water channel and a construction method thereof. The application is arranged at a reentrant corner part between a prefabricated double-skin wall and a composite roof, and comprises a prefabricated overhanging plate and a prefabricated wall plate arranged at the reentrant corner part. A plurality of prefabricated wall plates and a plurality of prefabricated double-skin walls form two side walls of the suspension water channel respectively, and a plurality of prefabricated overhanging plates and a plurality of composite roofs form a bottom plate and a top plate of the suspension water channel respectively. The prefabricated component assembled construction process is adopted to realize a rapid construction process of the structure. Compared with a traditional cast-in-situ construction process, the prefabricated component assembled construction process saves the processes of formwork erection, pouring, maintenance and formwork removal of each part, avoids time constraints and operation space constraints between processes, greatly improves the construction efficiency on site, and simplifies the construction difficulty of workers on site.

Description

Technical Field

[0001] The present application relates to the field of building construction, and specifically to a prefabricated assembled suspended water channel and a construction method thereof. Background Art

[0002] During traditional cast-in-place construction of a suspended water channel, the supporting structure (primarily the wall panels) must first be cast. Next, scaffolding is erected to the bottom elevation of the suspended water channel, where the bottom formwork is installed. The bottom slab reinforcement is then tied to it, and the bottom slab concrete is poured. Once the bottom slab concrete reaches the design strength, wall reinforcement is tied to the upper side of the cantilever, and the side wall formwork is installed. The side wall concrete is then poured to the top elevation. The side wall formwork is then removed, and the top slab formwork is installed. The top slab reinforcement is tied to the top slab formwork, and the top slab concrete is poured. Once the concrete strength reaches the design requirements, the top slab formwork supports are removed. This process is repeated until the entire water channel structure is cast.

[0003] When using the traditional cast-in-place construction process for hanging water channels, since the bottom plate, side walls and top plate are all cast-in-place concrete, the molding process of each part involves the steps of setting up formwork, tying steel bars, pouring concrete, and removing formwork. There are time constraints between the processes, resulting in a relatively long construction period. In addition, the cross-sectional dimensions of hanging water channels are generally small, and the limitation of spatial dimensions is very unfavorable for the process of supporting and removing formwork when pouring concrete on the side walls and top plate. The purpose of this application is to resolve the constraints between the processes, shorten the construction period, avoid the constraints of space on the construction process, and reduce the difficulty of construction operations. Summary of the Invention

[0004] The purpose of the present invention is to provide a prefabricated assembled suspended water channel and a construction method thereof, in order to solve the technical problems of the prior art in that the construction process is complicated and the construction period is long.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A prefabricated assembled hanging water channel is provided at the inner corner between a prefabricated double wall and a composite roof plate, and is characterized in that: it comprises a prefabricated cantilever plate and a prefabricated wall plate provided at the inner corner, a plurality of prefabricated wall plates are connected end to end with a plurality of prefabricated double walls, respectively forming the side walls of the hanging water channel, a plurality of prefabricated cantilever plates are spliced ​​together with a plurality of composite roof plates, respectively forming the bottom plate and the top plate of the hanging water channel; a rib is reserved at the end of the prefabricated cantilever plate close to the prefabricated double wall, and an exposed dowel is reserved near the top surface of the end of the prefabricated wall plate, and the rib passes through a single side of the prefabricated double wall. After the horizontal grooves are cut in the wall panels, they are inserted into the cavity of the prefabricated double-skin wall and fixed by pouring No. 0 concrete. Vertical steel bars and grouting sleeves are embedded in the prefabricated wall panels. The vertical steel bars and exposed dowel bars are respectively inserted into the upper and lower parts of the grouting sleeves. The exposed dowel bars are inserted into the lower part of the grouting sleeves and then connected by grouting. The joints between the prefabricated wall panels and the prefabricated cantilever panels are filled with grouting material. The upper part of the prefabricated wall panels is provided with reserved dowel bars for fixing to the composite top plate, and through holes are reserved on the composite top plate at positions corresponding to the reserved dowel bars. A steel bar anchor head is provided on the top of the reserved dowel bars.

[0007] Further preferably, the prefabricated double wall includes prefabricated panels on both sides and concrete filled between the prefabricated panels on both sides, the composite top plate includes a prefabricated composite panel located at the bottom and a cast-in-place composite layer located at the top, the prefabricated composite panel includes a prefabricated concrete layer and truss steel bars cast in the lower part of the concrete layer, and upper steel bars are arranged on the upper layer of the truss steel bars; the cast-in-place composite layer is cast together with the No. 0 concrete above the rebar in the prefabricated double wall.

[0008] Furthermore, a temporary oblique support is provided between the prefabricated cantilever plate and the prefabricated wall panel, and both ends of the temporary oblique support are hinged to embedded parts provided on the prefabricated cantilever plate and the prefabricated wall panel respectively.

[0009] Furthermore, the ends of the prefabricated wall panels that are spliced ​​together are provided with isosceles trapezoidal grooves that are recessed toward the inner side of the wall. There are polyethylene round rods between the wall panel units on both sides of the isosceles trapezoidal grooves. Construction sealant is filled on the outside of the polyethylene round rods and between the wall panel units. Slurry is filled in the cavities opposite to the isosceles trapezoidal grooves on both sides. The slurry and the construction sealant work together to connect the wall panel units on both sides.

[0010] Furthermore, the adjacent joints of the prefabricated double-skin walls and the adjacent joints of the prefabricated panels are backed by polyethylene round rods, and the outside is sealed with building sealant. The adjacent joints of the inner surface of the prefabricated panels are tightly paved with steel mesh and poured in No. 0 concrete.

[0011] A construction method for a prefabricated component assembled suspended water channel, characterized in that it comprises the following steps:

[0012] S1, install the prefabricated cantilever plate on the prefabricated double-skin wall: after the prefabricated cantilever plate is inserted into the cavity of the prefabricated double-skin wall through horizontal slotting, the bottom of the prefabricated cantilever plate is fixed by temporary support, then 0 concrete is poured to the top surface of the prefabricated cantilever plate to a height of +300mm, so that the prefabricated cantilever plate and the prefabricated double-skin wall are anchored and connected through the outrigger, after the concrete strength reaches the requirement, the temporary support at the bottom of the prefabricated cantilever plate is removed, and step S2 is performed;

[0013] S2, install the prefabricated wall plate on the prefabricated cantilever plate: before hoisting the prefabricated wall plate, the mortar is first spread on the top surface of the prefabricated cantilever plate and the connecting part of the prefabricated wall plate, then the prefabricated wall plate is hoisted and positioned, the exposed reinforcing bar on the top surface of the prefabricated cantilever plate is inserted into the grouting sleeve of the prefabricated wall plate, and the temporary inclined support is installed between the prefabricated wall plate and the prefabricated cantilever plate to temporarily fix the prefabricated wall plate, then the grouting sleeve is grouted to connect the exposed reinforcing bar and the grouting sleeve, after the strength of the grouting material and the mortar reaches the requirement, the prefabricated wall plate is fixed, the temporary inclined support and the embedded part are removed, and waterproof treatment is performed on the U-shaped water channel composed of the prefabricated cantilever plate, the prefabricated wall plate and the prefabricated double-skin wall:

[0014] S3, install the composite roof plate on the prefabricated wall plate: the prefabricated composite plate of the composite roof plate is overlapped on the prefabricated double-skin wall and the prefabricated wall plate, the reserved reinforcing bar penetrates through the through hole, then the reinforcing bar anchor head is installed on the top of the reserved reinforcing bar, the reinforcing bar anchor head is used to realize the anchoring connection between the composite roof plate and the prefabricated wall plate, after the top finishing surface reinforcing bar is bound, the cast-in-situ composite layer and the 0 concrete above the outrigger of the prefabricated double-skin wall are poured and cured, and the assembly type suspended water channel construction is completed.

[0015] Compared with the prior art, the present application has the following characteristics and beneficial effects:

[0016] In the present application, the prefabricated composite plate, the prefabricated cantilever plate, the prefabricated double-skin wall and the prefabricated wall plate are respectively used as the roof plate, the bottom plate and the side wall of the suspended water channel, and the prefabricated construction process is used to realize the rapid construction process of the structure. Compared with the traditional cast-in-situ construction process, the processes of formwork, pouring, curing and form removal at each position are omitted, the time constraints and operation space constraints between processes are avoided, the construction efficiency on site is greatly improved, and the construction difficulty of workers on site is simplified. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the prefabricated double-skin wall involved in the present application;

[0018] Figure 2 It is a connection diagram of the prefabricated double-skin wall and the prefabricated cantilever plate involved in the present application;

[0019] Figure 3 It is a connection diagram of the prefabricated cantilever plate and the prefabricated wall plate involved in the present application;

[0020] Figure 4 The connection diagram of the composite roof and the prefabricated wallboard involved in the present application is illustrated;

[0021] Figure 5 The pouring diagram of the cast-in-place composite layer involved in the present application is illustrated;

[0022] Figure 6 The connection diagram between the prefabricated wallboard units involved in the present application is illustrated;

[0023] Figure 7 The connection diagram between the prefabricated double-skin wall wallboard units involved in the present application is illustrated. DETAILED DESCRIPTION

[0024] In order to make the technical means, innovative features, purposes and effects achieved by the present application easy to understand, the present application is further described below.

[0025] The embodiments described herein are specific concrete embodiments of the present application, used to illustrate the concept of the present application, and are explanatory and exemplary, and should not be interpreted as limiting the embodiments of the present application and the scope of the present application. In addition to the embodiments described herein, those skilled in the art can also employ other technical solutions that are obvious based on the disclosure of the claims and the specification of the present application, which include technical solutions that make any obvious substitutions and modifications to the embodiments described herein.

[0026] A prefabricated component assembly type suspended water channel is arranged at the internal corner part between a prefabricated double-skin wall 1 and a composite roof 2, as shown in the figure, comprising a prefabricated overhanging plate 3 and a prefabricated wallboard 4 arranged at the internal corner part, a plurality of prefabricated wallboards 4 are connected head to tail and a plurality of prefabricated double-skin walls 1 are connected head to tail to form two side walls of the suspended water channel respectively, a plurality of prefabricated overhanging plates 3 are spliced with each other and a plurality of composite roofs 2 are spliced with each other to form the bottom plate and the top plate of the suspended water channel respectively; the end of the prefabricated overhanging plate 3 close to the prefabricated double-skin wall 1 is reserved with a flange 31, and the top surface of the end of the prefabricated wallboard 4 is reserved with an exposed dowel 32, the flange 31 passes through the horizontal slot 14 of the single-sided wall plate of the prefabricated double-skin wall 1, is inserted into the cavity of the prefabricated double-skin wall 1, and is fixed by pouring No. 0 concrete 11, No. 0 is the mark of the concrete to distinguish from other concrete, and is not the model of the concrete. Figures 1-7 The prefabricated wallboard 4 is embedded with vertical steel bars 41 and grouting sleeves 42, the vertical steel bars 41 and the exposed dowels 32 are inserted into the upper part and the lower part of the grouting sleeves 42 respectively, and the exposed dowels 32 are connected by grouting after being inserted into the lower part of the grouting sleeves 42; the splicing joint between the prefabricated wallboard 4 and the prefabricated overhanging plate 3 is filled with grouting material 5; the upper part of the prefabricated wallboard 4 is provided with a reserved dowel 43 for fixing with the composite roof 2.

[0027]

[0028] ​The composite roof 2 has a through hole 22 at a position corresponding to the reserved reinforcing bar 43; the reserved reinforcing bar 43 has a steel bar anchor head 44 at the top, which should meet the anchoring requirements.

[0029] The prefabricated double-skin wall 1 includes two prefabricated panels 12 and concrete filled between the two prefabricated panels 12, and the composite roof 2 includes a prefabricated composite panel 23 at the lower part and a cast-in-situ composite layer 24 at the upper part, the prefabricated composite panel 23 includes a concrete layer and truss steel bars casted at the lower part of the concrete layer, and the top finishing surface steel bars 21 are arranged on the upper layer of the truss steel bars; the cast-in-situ composite layer 24 is jointly formed with the No. 0 concrete 11 above the protruding steel bars 31 in the prefabricated double-skin wall 1.

[0030] Temporary diagonal supports 6 are further arranged between the prefabricated cantilevered panel 3 and the prefabricated wall panel 4, and the temporary diagonal supports 6 are hingedly connected with the embedded parts 8 arranged on the prefabricated cantilevered panel 3 and the prefabricated wall panel 4 at two ends.

[0031] The end of the prefabricated wall panel 4 for splicing with each other is provided with an isosceles trapezoidal groove 45 recessed to the inner side of the wall, the polyethylene round bar 7 is embedded between the wall panel units on the two sides of the isosceles trapezoidal groove 45 (the polyethylene round bar 7 is used as a backing), and the building sealant is applied between the polyethylene round bar 7 and the wall panel units on the outer side, the cavities opposite to the isosceles trapezoidal grooves 45 are filled with grout, and the grout and the building sealant jointly connect the wall panel units on the two sides.

[0032] The joint position of the adjacent prefabricated double-skin wall 1, i.e., the joint of the adjacent prefabricated panels 12 is backed with the polyethylene round bar 7, the outer side is sealed with the building sealant, the joint of the inner side panel surface of the adjacent prefabricated panels 12 is tightly laid with the steel mesh 13, and the No. 0 concrete 11 is poured.

[0033] A construction method of a prefabricated component assembly type suspended water channel includes the following steps:

[0034] S1, installing the prefabricated cantilevered panel 3 on the prefabricated double-skin wall 1: the protruding steel bars 31 of the prefabricated cantilevered panel 3 are inserted into the cavity of the prefabricated double-skin wall 1 after the horizontal slotting 14, the bottom of the prefabricated cantilevered panel 3 is fixed by the temporary support, then the No. 0 concrete 11 is poured to the top surface of the prefabricated cantilevered panel 3 to the position at +300 mm, so that the prefabricated cantilevered panel 3 and the prefabricated double-skin wall 1 are connected by the protruding steel bars 31, after the concrete strength reaches the requirement, the temporary support at the bottom of the prefabricated cantilevered panel 3 is cancelled, and the step S2 is constructed;

[0035] S2, mounting prefabricated wall plate 4 on prefabricated cantilever plate 3: before hoisting prefabricated wall plate 4, lay the mortar 5 on the top surface of the prefabricated cantilever plate 3 at the connecting part of the prefabricated wall plate 4, then hoist the prefabricated wall plate 4 into position, insert the exposed reinforcing bar 32 on the top surface of the prefabricated cantilever plate 3 into the grouting sleeve 42 of the prefabricated wall plate 4, install temporary diagonal support 6 between the prefabricated wall plate 4 and the prefabricated cantilever plate 3, realize temporary fixation of the prefabricated wall plate 4, then grout the grouting sleeve 42, connect the exposed reinforcing bar 32 with the grouting sleeve 42, after the strength of the grout and the mortar 5 reaches the requirement, the prefabricated wall plate 4 is fixed, the temporary diagonal support 6 and the embedded part 8 are removed, and waterproof treatment is carried out on the U-shaped inner wall formed by the prefabricated cantilever plate 3, the prefabricated wall plate 4 and the prefabricated double-skin wall 1;

[0036] S3, mounting composite roof plate 2 on prefabricated wall plate 4: prefabricated composite plate 23 of composite roof plate 2 is overlapped on prefabricated double-skin wall 1 and prefabricated wall plate 4, reserved reinforcing bar 43 passes through through hole 22, then reinforcing bar anchor head 44 is installed on the top of reserved reinforcing bar 43, reinforcing bar anchor head 44 is used to realize anchoring connection of composite roof plate 2 and prefabricated wall plate 4, after binding of top finished surface reinforcing bar 21 is completed, 0# concrete 11 above protruding reinforcing bar 31 in prefabricated double-skin wall 1 and cast-in-place composite layer 24 are poured at the same time, and curing is formed, thus, the prefabricated suspended water channel construction is completed.

[0037] The application is a prefabricated construction process design for suspended water channel, the top plate, bottom plate and side wall of the water channel structure all use prefabricated components, therefore, before formal implementation, the splitting and prefabrication of prefabricated components need to be completed according to the design in the scheme, the prefabricated components include prefabricated double-skin wall with single side horizontal slot, prefabricated wall plate, prefabricated composite plate and prefabricated cantilever plate. In actual operation, first, the prefabricated double-skin wall with single side horizontal slot is installed into position; then, temporary support is erected on the slotted side to the lower part of the horizontal slot, the prefabricated cantilever plate is placed on the temporary support, and the protruding reinforcing bar side is inserted into the double-skin wall; after that, the concrete is poured in the prefabricated double-skin wall to 300mm above the top of the prefabricated cantilever plate; after the strength of the cast-in-place concrete reaches the requirement, the prefabricated wall plate is installed on the cantilever end of the cast-in-place concrete, the connection between the prefabricated wall plate and the prefabricated cantilever plate is realized by the reinforcing bar sleeve grouting method; then, the waterproof is applied on the U-shaped inner wall formed between the prefabricated cantilever plate, the prefabricated wall plate and the prefabricated double-skin wall according to the waterproof design; finally, the prefabricated composite plate is erected on the top of the prefabricated double-skin wall and the prefabricated wall plate, after the steel bars on the upper part of the composite plate are bound with the roof steel bars, the concrete is poured to the top of the composite plate again, forming the suspended water channel structure unit; the joints of adjacent structure units are connected by the method of glueing + pouring concrete or grouting material, realizing the expansion of the water channel along the longitudinal direction.

[0038] The above merely describes preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A prefabricated component assembled suspension water channel, which is arranged at the inside corner part between a prefabricated double-skin wall (1) and a composite roof (2), characterized in that: The utility model relates to a prefabricated double-skin wall (1) and a prefabricated wallboard (4) are arranged at the inside corner part, a plurality of prefabricated wallboards (4) are connected head to tail and a plurality of prefabricated double-skin walls (1) are connected head to tail to form the two side walls of the suspended water channel respectively, a plurality of prefabricated cantilevered plates (3) are spliced with each other and a plurality of composite roof boards (2) are spliced with each other to form the bottom plate and the top plate of the suspended water channel respectively, the end part of the prefabricated cantilevered plate (3) is reserved with a flange (31) close to the prefabricated double-skin wall (1), the top surface of the end part of the prefabricated wallboard (4) is reserved with an exposed reinforcing bar (32), the flange (31) is inserted in the cavity of the prefabricated double-skin wall (1) after passing through the horizontal slot (14) of the single-side wall plate of the prefabricated double-skin wall (1) and is fixed through pouring No. The utility model relates to a prefabricated double-skin wall (1) and a prefabricated wallboard (4) are arranged at the inside corner part, a plurality of prefabricated wallboards (4) are connected head to tail and a plurality of prefabricated double-skin walls (1) are connected head to tail to form the two side walls of the suspended water channel respectively, a plurality of prefabricated cantilevered plates (3) are spliced with each other and a plurality of composite roof boards (2) are spliced with each other to form the bottom plate and the top plate of the suspended water channel respectively, the end part of the prefabricated cantilevered plate (3) is reserved with a flange (31) close to the prefabricated double-skin wall (1), the top surface of the end part of the prefabricated wallboard (4) is reserved with an exposed reinforcing bar (32), the flange (31) is inserted in the cavity of the prefabricated double-skin wall (1) after passing through the horizontal slot (14) of the single-side wall plate of the prefabricated double-skin wall (1) and is fixed through pouring No. The utility model relates to a prefabricated double-skin wall (1) and a prefabricated wallboard (4) are arranged at the inside corner part, a plurality of prefabricated wallboards (4) are connected head to tail and a plurality of prefabricated double-skin walls (1) are connected head to tail to form the two side walls of the suspended water channel respectively, a plurality of prefabricated cantilevered plates (3) are spliced with each other and a plurality of composite roof boards (2) are spliced with each other to form the bottom plate and the top plate of the suspended water channel respectively, the end part of the prefabricated cantilevered plate (3) is reserved with a flange (31) close to the prefabricated double-skin wall (1), the top surface of the end part of the prefabricated wallboard (4) is reserved with an exposed reinforcing bar (32), the flange (31) is inserted in the cavity of the prefabricated double-skin wall (1) after passing through the horizontal slot (14) of the single-side wall plate of the prefabricated double-skin wall (1) and is fixed through pouring No.

2. A precast component assembled suspended water conduit as claimed in claim 1, characterised in that: The utility model relates to a prefabricated double-skin wall (1) and a prefabricated wallboard (4) are arranged at the inside corner part, a plurality of prefabricated wallboards (4) are connected head to tail and a plurality of prefabricated double-skin walls (1) are connected head to tail to form the two side walls of the suspended water channel respectively, a plurality of prefabricated cantilevered plates (3) are spliced with each other and a plurality of composite roof boards (2) are spliced with each other to form the bottom plate and the top plate of the suspended water channel respectively, the end part of the prefabricated cantilevered plate (3) is reserved with a flange (31) close to the prefabricated double-skin wall (1), the top surface of the end part of the prefabricated wallboard (4) is reserved with an exposed reinforcing bar (32), the flange (31) is inserted in the cavity of the prefabricated double-skin wall (1) after passing through the horizontal slot (14) of the single-side wall plate of the prefabricated double-skin wall (1) and is fixed through pouring No.

3. A method of constructing a precast construction element assembled suspended water conduit according to claim 1 or 2, characterized in that: The utility model relates to a prefabricated double-skin wall (1) and a prefabricated wallboard (4) are arranged at the inside corner part, a plurality of prefabricated wallboards (4) are connected head to tail and a plurality of prefabricated double-skin walls (1) are connected head to tail to form the two side walls of the suspended water channel respectively, a plurality of prefabricated cantilevered plates (3) are spliced with each other and a plurality of composite roof boards (2) are spliced with each other to form the bottom plate and the top plate of the suspended water channel respectively, the end part of the prefabricated cantilevered plate (3) is reserved with a flange (31) close to the prefabricated double-skin wall (1), the top surface of the end part of the prefabricated wallboard (4) is reserved with an exposed reinforcing bar (32), the flange (31) is inserted in the cavity of the prefabricated double-skin wall (1) after passing through the horizontal slot (14) of the single-side wall plate of the prefabricated double-skin wall (1) and is fixed through pouring No. The utility model relates to a prefabricated double-skin wall (1) and a prefabricated wallboard (4) are arranged at the inside corner part, a plurality of prefabricated wallboards (4) are connected head to tail and a plurality of prefabricated double-skin walls (1) are connected head to tail to form the two side walls of the suspended water channel respectively, a plurality of prefabricated cantilevered plates (3) are spliced with each other and a plurality of composite roof boards (2) are spliced with each other to form the bottom plate and the top plate of the suspended water channel respectively, the end part of the prefabricated cantilevered plate (3) is reserved with a flange (31) close to the prefabricated double-skin wall (1), the top surface of the end part of the prefabricated wallboard (4) is reserved with an exposed reinforcing bar (32), the flange (31) is inserted in the cavity of the prefabricated double-skin wall (1) after passing through the horizontal slot (14) of the single-side wall plate of the prefabricated double-skin wall (1) and is fixed through pouring No. The utility model relates to a prefabricated double-skin wall (1) and a prefabricated wallboard (4) are arranged at the inside corner part, a plurality of prefabricated wallboards (4) are connected head to tail and a plurality of prefabricated double-skin walls (1) are connected head to tail to form the two side walls of the suspended water channel respectively, a plurality of prefabricated cantilevered plates (3) are spliced with each other and a plurality of composite roof boards (2) are spliced with each other to form the bottom plate and the top plate of the suspended water channel respectively, the end part of the prefabricated cantilevered plate (3) is reserved with a flange (31) close to the prefabricated double-skin wall (1), the top surface of the end part of the prefabricated wallboard (4) is reserved with an exposed reinforcing bar (32), the flange (31) is inserted in the cavity of the prefabricated double-skin wall (1) after passing through the horizontal slot (14) of the single-side wall plate of the prefabricated double-skin wall (1) and is fixed through pouring No. The utility model relates to a prefabricated double-skin wall (1) and a prefabricated wallboard (4) are arranged at the inside corner part, a plurality of prefabricated wallboards (4) are connected head to tail and a plurality of prefabricated double-skin walls (1) are connected head to tail to form the two side walls of the suspended water channel respectively, a plurality of prefabricated cantilevered plates (3) are spliced with each other and a plurality of composite roof boards (2) are spliced with each other to form the bottom plate and the top plate of the suspended water channel respectively, the end part of the prefabricated cantilevered plate (3) is reserved with a flange (31) close to the prefabricated double-skin wall (1), the top surface of the end part of the prefabricated wallboard (4) is reserved with an exposed reinforcing bar (32), the flange (31) is inserted in the cavity of the prefabricated double-skin wall (1) after passing through the horizontal slot (14) of the single-side wall plate of the prefabricated double-skin wall (1) and is fixed through pouring No. S1. Install the prefabricated cantilever plate (3) on the prefabricated double wall (1): insert the ribs (31) of the prefabricated cantilever plate (3) into the cavity of the prefabricated double wall (1) after passing through the horizontal groove (14). The bottom of the prefabricated cantilever plate (3) is fixed by temporary support. Then, No. 0 concrete (11) is poured to the top elevation of the prefabricated cantilever plate (3) + 300 mm. The prefabricated cantilever plate (3) and the prefabricated double wall (1) are anchored by the ribs (31). After the concrete strength reaches the required level, the temporary support measures at the bottom of the prefabricated cantilever plate (3) are cancelled and the construction of step S2 is carried out. S2. Install the prefabricated wall panel (4) on the prefabricated cantilever panel (3): Before hoisting the prefabricated wall panel (4), first spread the slurry (5) on the top surface of the prefabricated cantilever panel (3) and the connection part with the prefabricated wall panel (4), then hoist the prefabricated wall panel (4) into place, insert the exposed dowel (32) on the top surface of the prefabricated cantilever panel (3) into the grouting sleeve (42) of the prefabricated wall panel (4), and install a temporary oblique slurry between the prefabricated wall panel (4) and the prefabricated cantilever panel (3). Support (6) to achieve temporary fixation of the prefabricated wall panel (4), then grouting is performed in the grouting sleeve (42), and the exposed dowel bar (32) is connected to the grouting sleeve (42). After the strength of the grouting material and the grouting material (5) reaches the required level, the prefabricated wall panel (4) is fixed, the temporary oblique support (6) and the embedded parts (8) are removed, and waterproofing is performed on the inner wall of the U-shaped channel composed of the prefabricated cantilever plate (3), the prefabricated wall panel (4) and the prefabricated double-skin wall (1); S3. Install the composite top plate (2) on the prefabricated wall panel (4): The prefabricated composite plate (23) of the composite top plate (2) is overlapped on the prefabricated double wall (1) and the prefabricated wall panel (4), and the reserved dowel bar (43) passes through the through hole (22). Then, the steel anchor head (44) is installed on the top of the reserved dowel bar (43). The steel anchor head (44) is used to realize the anchor connection between the composite top plate (2) and the prefabricated wall panel (4). After completing the binding of the top surface steel bar (21), the cast-in-place composite layer (24) and the No. 0 concrete (11) above the inner dowel bar (31) of the prefabricated double wall (1) are poured at the same time and cured to form. At this point, the construction of the assembled hanging channel is completed.

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