PCF plate single-side formwork erecting construction technology

Abstract

The invention discloses a PCF plate single-side formwork erecting construction process which comprises the specific process steps that a PCF plate is manufactured, a mold assembly is customized according to the set size of the PCF plate, bare concrete is poured into the mold assembly, and then the needed PCF plate is formed. And pre-burying and laying: laying ground anchor systems on the ground in sequence. The method comprises the steps of floor pouring, PCF plate hoisting, supporting frame body mounting and fixing, back ridge supporting and reinforcing, triangular frame primary pressing, triangular frame straightening, triangular frame secondary pressing, wall concrete pouring and frame body dismantling. The poured wall body is divided into the PCF plate formed through a mold in the early stage and the inner side wall body formed through pouring in the later stage. And meanwhile, the flat plate sleeve seat used for being connected with the tripod is pre-buried on the PCF plate, so that a single-side formwork supporting process is realized, and the phenomena that a through-wall screw rod needs to be fixed with an outer guide wall in a foundation pit due to the fact that the tripod needs to be mounted and fixed, a through hole is finally formed after a wall body is formed, and local outer wall water seepage is caused are avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and in particular relates to a PCF board single-side formwork construction process. Background Art

[0002] With the rapid development of the construction industry, super-high-rise buildings have emerged. More and more super-high-rise buildings are constantly demanding benefits from underground space. Deep foundation pit excavation and foundation pit support construction are required before basement construction. As the depth of the foundation pit continues to increase, the construction difficulty becomes greater and greater, and the waterproofing requirements become higher and higher.

[0003] The foundation pit support often adopts reinforced concrete support piles plus internal support beam system, through the method of diagonal bracing, formwork + through-wall screws. The diagonal bracing, formwork + through-wall screw method requires first opening holes in the formwork and pre-burying PVC pipes, and then passing the through-wall screws through the formwork and the outer guide wall in the foundation pit for fixation. The diagonal bracing is a triangular support frame to support and fix the formwork. After the double-sided formwork is fixed in the foundation, concrete is poured in the formwork. After the concrete reaches a certain strength, the through-wall screws and formwork are removed, and the through-wall screws, formwork and diagonal bracing are moved to the next construction section for construction pouring.

[0004] However, when the basement exterior wall is too close to the outer guide wall, and some of the exterior walls are even close to the outer guide wall, the conventional double-sided formwork system cannot be used when pouring the basement exterior wall. A single-sided formwork system is generally used. However, in order to ensure the overall stability of the formwork system, most single-sided formwork systems require through-wall screws to be set on the formwork to fix it to the outer guide wall. After the screws are removed, local leakage often occurs at the screw holes on the side walls of the basement, causing water seepage in the exterior wall, and it is not convenient to plug the leaks later. At the same time, since formwork is required for support during the pouring process, the staff cannot intuitively know the status of the final basement interior wall surface, and a lot of manpower is required for processing and maintenance in the later stage, which prolongs the construction period. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, the present invention provides a PCF board single-sided formwork construction process to solve the technical problems that the formed basement wall is prone to leakage and the surface state of the basement inner wall is difficult to control.

[0006] To achieve the above purpose, the specific technical solutions of the present invention are as follows: A PCF board single-side formwork construction process, the specific process steps are as follows: S1. PCF board production: Customize the mold assembly according to the set PCF board size, and pour the plain concrete in the mold assembly to form the required PCF board. The PCF board is pre-embedded with a flat sleeve for the installation and fixation of the back corrugated square steel and the tripod.

[0007] S2, pre-embedded laying, laying the anchor system on the ground in sequence. The anchor system is used to connect and fix the bottom of the tripod, thereby realizing the support of the tripod to the PCF board.

[0008] S3, floor pouring, by pouring concrete to form the required floor. Before pouring the floor, place a wooden formwork under the PCF board installation position and remove it after the concrete is finally set to form an installation space that matches the PCF board.

[0009] S4, PCF board hoisting, hoist the PCF board into the installation space, and form a casting chamber between the PCF board and the outer guide wall in the foundation pit.

[0010] S5. The support frame is installed and fixed, and multiple inclined rod assemblies are installed on the hoisted PCF board. The other end of the inclined rod assembly is against the floor to form a triangular support structure, which provides preliminary support for the hoisted PCF board.

[0011] S6, back rib support reinforcement, install reinforcement screws in the flat sleeve on the PCF board. Set two back rib square steels on both sides of the reinforcement screws, and fix the relative positions of the two back rib square steels by nuts to form support for the bottom of the PCF board.

[0012] S7. The tripod is initially pressed and hoisted to the position of the corresponding reinforcement screw. The reinforcement screw passes through the tripod and presses the tripod to the bottom of the PCF board through the nut to further support the PCF board.

[0013] S8, straighten the tripod, rotate the adjustment screw at the rear end of the tripod to lift the rear end of the tripod, and further adjust the verticality of the PCF board while further pressing the PCF board.

[0014] S9, secondary compression of the tripod: two compression beams are laid on the inclined beams of the tripod. The compression beams are connected to the ground anchor system to form secondary compression of the PCF.

[0015] S10, wall concrete pouring, by pouring concrete into the pouring cavity formed between the PCF board and the outer guide wall in the foundation pit to form a wall.

[0016] S11. Wait for the concrete to solidify. After the concrete strength reaches more than 50% of the design strength, remove the compression beam, tripod and back rib square steel in turn.

[0017] Furthermore, the mold assembly in step 1 includes a mold base and a side frame mold. The side frame mold is fixed on the mold base. The mold base is provided with a plurality of molding rods, flat plate sleeves, and truss bars arranged in sequence. The outer end of the truss bar is higher than the top surface of the side frame mold, and can form an exposed connection portion after the PCF board is cast and formed. The molding rod and the flat plate sleeve are both fixed to the mold base by magnetic attraction. The molding rod is used to form a through hole in the PCF board after casting.

[0018] Furthermore, the ground anchor system in step S2 includes an underground screw, a connecting nut, an outer connecting rod and a butterfly nut. The underground screw is welded to the steel bar in the floor, and the outer end is tilted upward to ensure that the outer end can be exposed to the outside world after the floor is poured. The outer end thread of the underground screw is connected to the outer connecting rod through a connecting nut. The outer end of the outer connecting rod passes through the spacing area between the two pressure beams and is connected and fixed by a nut washer and a butterfly nut.

[0019] Furthermore, in the process of hoisting the PCF board in step S4, multiple groups of cushion blocks are placed in the installation space, and the top elevation of each group of cushion blocks is re-measured to ensure that the PCF boards hoisted into the installation space are at the same height. A 5mm gap is left between two adjacent PCF boards. After the two adjacent PCF boards are installed, the 5mm gap is filled with structural glue and sealed with a triangular strip.

[0020] Furthermore, the diagonal rod assembly in step S5 includes a diagonal brace rod and two supporting connectors. The two supporting connectors are respectively fixed to the corresponding PCF board and the floor by bolts. The two ends of the diagonal brace rod are respectively hinged to the two supporting connectors.

[0021] Furthermore, in step S5, the verticality of the PCF board is reviewed after the installation of the diagonal rod assembly is completed.

[0022] Furthermore, the outer end of the reinforcing screw in step S6 is provided with a C-shaped steel clip matched with the two back-flanged square steels. The C-shaped steel clip is sleeved on the outer rings of the two back-flanged square steels and the relative positions of the two back-flanged square steels are fixed by nuts.

[0023] Furthermore, in the step S10, the concrete is poured twice during the pouring process, the first pouring height is 1.565m, and the second pouring height is 1.265m.

[0024] Furthermore, the concrete pouring in step S10 is carried out while being poured, and the vibration process is divided into two groups of workers, coarse vibration and fine vibration. The coarse vibration group moves with the pump pipe, and the fine vibration uses a slender high-frequency vibrating rod to vibrate in layers, with fast insertion and slow withdrawal.

[0025] Furthermore, in step S10, before pouring concrete, a template is fixed above the outer guide wall in the foundation pit, and concrete is directly poured on the template through a pump pipe and then flows into the pouring chamber. At the same time, tarpaulin is laid on the outer side and top surface of the PCF board.

[0026] Compared with the prior art, the present invention has the following advantages: The present invention divides the poured wall into a PCF board formed by a mold in the early stage and an inner wall formed by pouring in the later stage. At the same time, a flat plate sleeve for connecting the tripod is pre-embedded on the PCF board. While realizing the single-side formwork process, it avoids the need to complete the installation and fixation of the tripod, which leads to the need to use a through-wall screw to fix it with the outer guide wall in the foundation pit, and finally forms a through hole after the wall is formed, causing local leakage and water seepage in the outer wall.

[0027] The present invention arranges a prefabricated PCF board as an inner support formwork for pouring the wall, and is integrated with the inner cavity after pouring. The outer side of the PCF board serves as the inner surface of the basement. The staff can visually observe the state of the inner surface of the basement before pouring, thereby ensuring the aesthetics of the final wall surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is the overall process flow chart of the present invention; Figure 2 It is a structural schematic diagram of the tripod and the diagonal rod assembly in the present invention; Figure 3 Schematic diagram of the relative positions of the tripod and the PCF board in the present invention; Figure 4 It is a schematic diagram of the structure of the buried screw rod in the present invention; Figure 5 It is a schematic diagram of the relative positions of the back-ribbed square steel and the tripod in the present invention.

[0029] Figure numerals: 1. PCF board; 1-1. Skirting board; 1-2. Truss reinforcement; 2. Ground anchor system; 2-1. Buried screw; 2-2. Connecting nut; 2-3. External connecting rod; 3. Installation space; 4. Diagonal rod assembly; 5. Back-ribbed square steel; 6. C-shaped steel clamp; 7. Tripod; 8. Adjusting screw; 9. Pressure beam; 10. Reinforcement screw; 11. External guide wall. DETAILED DESCRIPTION

[0030] In the description of the present invention, it is necessary to understand that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "center", "end", "length", "outer end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] like Figure 1 and 2 As shown in the figure, a PCF board single-side formwork construction process, the specific construction process is as follows: S1, PCF board 1 production, S1.1. PCF board size setting, axis division between columns in the construction site, planning and calculation of required width of each PCF board 1, and design planning of hole positions on PCF board 1.

[0033] S1.2, mold shaping and casting, A mold assembly is made according to the set size of the PCF board 1. The required PCF board 1 is formed by pouring plain concrete in the mold assembly. The mold assembly includes a mold base and a side frame mold. The side frame mold is fixed on the mold base. The bottom edge of the side frame mold is provided with a chamfer of a skirting 1-1, which can form a skirting 1-1 at the bottom of the PCF board 1 after pouring. Chamfers and notches are provided on the side edges of the side frame mold, which are used to form the chamfers and beam notches on the upper side of the PCF board 1. The beam notch reserves space for the later pouring of the top beam.

[0034] The mold platform is provided with a plurality of forming rods, flat plate sleeves, and truss bars 1-2 arranged in sequence. Among them, the outer end of the truss bar 1-2 is higher than the top surface of the side frame mold, and can form an exposed connection portion after the PCF board 1 is cast and formed. When the subsequent basement wall is cast, the PCF board 1 can be connected to the cast wall through the connection portion. The forming rod and the flat plate sleeve are both fixed on the mold platform by magnetic attraction. The forming rod is used to form a through hole on the PCF board 1 after casting. The through holes are arranged in sequence on the top of the PCF board 1 to reserve space for the installation of the tension screws on the subsequent PCF board 1. The flat plate sleeve is provided with exposed threaded holes for the subsequent installation of the tripod 7 and square steel. In this embodiment, the thickness of the flat plate sleeve is less than the thickness of the PCF board to prevent the threaded holes on the flat plate sleeve from penetrating the formed PCF board and causing water leakage of the PCF.

[0035] S1.3, PCF board storage, After demoulding, PCF board 1 is stacked on a vertical rack. The mold table of PCF board 1 is protected by plastic film, and the points involved in the lifting and the hooks, anchor plates and other components that are in direct contact with the board are wrapped and covered with tape to avoid direct contact with PCF board 1.

[0036] S1.4. Clean the table surface. Use a table formwork cleaner to clean the remaining concrete residue on the surface of the table. Then use a scouring pad to clean the concrete and dust. Use an angle grinder to clean the stubborn concrete marks and rust on the steel formwork until the table surface is smooth and flat. Then use a strong degreaser to clean it, then wash it with water. Finally, wipe the table dry to remove any stains or water stains, and then apply epoxy resin.

[0037] S2, pre-buried laying, S2.1, point deepening, According to the PCF boards 1 to be hoisted and arranged, the arrangement of the tripods 7 for support and the arrangement of the diagonal rod assemblies 4 for diagonally supporting the PCF boards 1 are calculated. Among them, each tripod 7 is aligned with each flat plate socket on the PCF board 1. The diagonal rod assembly 4 is arranged between two adjacent flat plate sockets.

[0038] S2.2, pre-embedded fixed, like Figure 3 and 4 As shown, the ground anchor system 2 is laid on the ground in sequence. The ground anchor system 2 is fixed to the steel bars of the floor by welding. The ground anchor system 2 can be connected and fixed to the tripod 7 after pouring, thereby achieving the support of the tripod 7 to the PCF board 1.

[0039] S3, floor pouring, The required floor is formed by pouring concrete. At the same time, before pouring the floor, two layers of 15mm thick and 150mm wide wooden formwork are placed under the installation position of the PCF board 1, and a 200mm high guide wall formwork is placed under the wide wooden formwork. After the concrete is finally set, the formwork is taken out to form an installation space 3 with a width of 150mm and a height of 30mm, which serves as the drainage ditch under the wall of the PCF board 1, and at the same time, space for adjustment is reserved for the installation conditions of the PCF board 1.

[0040] S4, PCF board hoisting and straightening, Hoist the PCF board 1 into the installation space 3, and a casting chamber is formed between the PCF board 1 and the outer guide wall 11 in the foundation pit. The connection part of the truss reinforcement 1-2 on the PCF board 1 extends into the casting chamber. During the hoisting process, place 3 groups of pads in the installation space 3, and re-measure the top elevation of each group of pads to ensure that the PCF boards 1 hoisted into the installation space 3 are at the same height to avoid the height difference between the boards causing the screw holes and the bottom skirting 1-1 to be misaligned. During the hoisting process, there is a 5mm gap between the boards. After the adjacent components are installed, the 5mm gap is filled with structural adhesive and sealed with a triangular strip to eliminate installation errors and avoid leakage of wall concrete pouring.

[0041] S5. Initial support of the support frame A plurality of diagonal rod assemblies 4 are installed on the hoisted PCF board 1, and the other end of the diagonal rod assembly is against the floor to form a triangular support structure, which provides preliminary support for the hoisted PCF board 1. After the installation of the diagonal rod assembly is completed, the verticality of the PCF board 1 is checked to ensure that the PCF board 1 is perpendicular to the floor.

[0042] In this embodiment, the diagonal rod assembly 4 includes a diagonal brace rod and two supporting connectors. The two supporting connectors are respectively fixed to the corresponding PCF board 1 and the floor by bolts. The two ends of the diagonal brace rod are respectively hinged to the two supporting connectors.

[0043] Furthermore, there are two groups of diagonal rod assemblies 4, and the top supporting ends of the two groups of diagonal rod assemblies 4 are arranged at intervals along the vertical direction, which can evenly distribute the supporting force to the hoisted PCF board 1 and ensure the stability of the support for the PCF board 1.

[0044] S6, back support reinforcement, A reinforcing screw 10 is installed in the flat sleeve on the PCF board 1. Two back-flanged square steels 5 are arranged on both sides of the reinforcing screw 10 to form a support for the bottom of the PCF board 1. A C-shaped steel clamp 6 matching the two back-flanged square steels 5 is arranged at the outer end of the reinforcing screw 10. The C-shaped steel clamp 6 is sleeved on the outer rings of the two back-flanged square steels 5 and fixes the relative positions of the two back-flanged square steels 5 by nuts. In this embodiment, the length of each back-flanged square steel 5 is 3m.

[0045] S7, the tripod is initially pressed tight. The tripod 7 is hoisted to the position of the corresponding reinforcing screw 10. The reinforcing screw 10 passes through the clearance slot of the vertical rod part of the tripod 7, and presses the tripod 7 to the bottom of the PCF board 1 through the nut, thereby further supporting the PCF board 1.

[0046] S8, straighten the tripod, The adjusting screw 8 at the rear end of the tripod 7 is rotated to lift the rear end of the tripod 7, and the verticality of the PCF board 1 is further adjusted while further pressing the PCF board 1 to ensure that the PCF board 1 is perpendicular to the floor.

[0047] S9, installation of tripod horizontal tie rod Two pressure beams 9 are laid on the inclined beams of the tripod 7. The two pressure beams 9 are arranged at intervals, and a pressure groove matched with the ground anchor system 2 is formed between them.

[0048] S10, the tripod is pressed twice, The tripod 7 is connected to the anchor system 2 to form a secondary compression on the bottom of the PCF board 1. Figure 3 , 4 As shown in Figure 5, the ground anchor system 2 includes an underground screw 2-1, a connecting nut 2-2, an outer connecting rod 2-3, a nut gasket and a butterfly nut. Among them, the buried screw 2-1 is welded to the floor or slab steel bars. The buried screw 2-1 is spot welded at the intersection with the two layers of transverse reinforcement in the floor to prevent the position of the buried screw 2-1 from shifting. The outer end of the buried screw 2-1 is tilted upward to ensure that the outer end can be exposed to the outside world after the floor is poured. The outer end thread of the buried screw 2-1 is connected to the outer connecting rod 2-3 through the connecting nut 2-2. The outer end of the outer connecting rod 2-3 passes through the pressure groove formed between the two pressure beams 9, and is connected and fixed by a nut gasket and a butterfly nut to achieve secondary tightening of the tripod 7.

[0049] In this embodiment, three buried screw rods 2 - 1 are arranged between every two tripods 7 , the distance between two adjacent buried screw rods 2 - 1 is about 330 mm, and the pulling force of a single buried screw rod 2 - 1 is 112.58 kN (ie 11.258 t).

[0050] S11, wall concrete pouring, By pouring concrete into the pouring chamber formed between the PCF board 1 and the outer guide wall 11 in the foundation pit, the wall is formed. At the same time, the PCF board 1 serves as the outer surface of the wall to ensure the beautiful appearance of the wall. The concrete is poured twice during the pouring process. The first pouring height is 1.565m, and the second pouring height is 1.265m. Among them, when pouring concrete, in order to avoid the problems of excessive construction load, impact leakage, etc. caused by the direct impact of concrete on the PCF board 1, a template is fixed above the top beam on the opposite side of the PCF board 1. The concrete is poured directly on the template through a pump pipe and then flows into the wall. At the same time, tarpaulin is laid on the surface and top surface of the PCF board 1 to avoid splashing and dripping pollution of the PCF board 1 by concrete pouring. Concrete is tamped as it is poured, and the vibration process is divided into two groups of workers: coarse vibration and fine vibration. The coarse vibration group moves with the pump pipe, mainly to make the pumped concrete more evenly distributed in the wall; the fine vibration uses slender high-frequency vibrating rods to vibrate in layers, insert quickly and pull out slowly, to eliminate bubbles in the concrete and ensure the working performance of the concrete.

[0051] S12, support frame removal, After the concrete solidifies and the concrete strength reaches more than 50% of the design strength, the compression beam 9, the tripod 7 and the back-ribbed square steel 5 are removed in sequence, and the part of the buried screw 2-1 protruding from the floor surface is cut and polished.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A PCF board single-side formwork construction process, characterized by: The process steps include: S1, PCF board production, customizing a mold assembly according to a set size of the PCF board (1); pouring plain concrete in the mold assembly to form the required PCF board (1); a flat sleeve is pre-embedded on the PCF board (1) for mounting and fixing the back corrugated square steel (5) and the tripod (7); S2, pre-embedded laying, laying the ground anchor system (2) on the ground in sequence; the ground anchor system (2) is used to connect and fix the bottom of the tripod (7), thereby achieving the support of the tripod (7) for the PCF board (1); S3, pouring the floor, forming the required floor by pouring concrete; before pouring the floor, placing a wooden formwork under the installation position of the PCF board (1), and taking it out after the concrete is finally set, so as to form an installation space (3) matching the PCF board (1); S4, PCF board installation, hoisting the PCF board (1) into the installation space (3), forming a casting chamber between the PCF board (1) and the outer guide wall (11) in the foundation pit; S5. The support frame is installed and fixed, and a plurality of inclined rod assemblies (4) are installed on the hoisted PCF board (1). The other ends of the inclined rod assemblies are connected to the floor to form a triangular support structure, which provides preliminary support for the hoisted PCF board (1); S6, back corrugation support reinforcement, a reinforcing screw is installed in the flat sleeve on the PCF board (1); two back corrugation square steels (5) are arranged on both sides of the reinforcing screw, and the relative positions of the two back corrugation square steels (5) are fixed by nuts to form support for the bottom of the PCF board (1); S7, the tripod is initially pressed, and the tripod (7) is hoisted to the position where the corresponding reinforcement screw is located; the reinforcement screw passes through the tripod (7), and the tripod (7) is pressed against the bottom of the PCF board (1) through a nut to further support the PCF board (1); S8, straightening the tripod, rotating the adjusting screw (8) at the rear end of the tripod (7) so that the rear end of the tripod (7) is lifted, further pressing the PCF board (1) and further adjusting the verticality of the PCF board (1); S9, secondary compression of the tripod, laying two compression beams (9) on the inclined beam of the tripod (7); the compression beams (9) are connected to the anchor system (2) to form secondary compression of the PCF; S10, pouring concrete for the wall, pouring concrete into a pouring chamber formed between the PCF board (1) and the outer guide wall (11) in the foundation pit to form a wall; S11, the frame is dismantled, and the concrete is allowed to solidify. After the concrete strength reaches more than 50% of the design strength, the compression beam (9), the tripod (7) and the back-ribbed square steel (5) are dismantled in sequence.

2. A PCF board single-side formwork construction process according to claim 1, characterized in that: The mold assembly in step 1 comprises a mold platform and a side frame mold; the side frame mold is fixed on the mold platform; the mold platform is provided with a plurality of molding rods, a flat plate sleeve, and truss bars (1-2) arranged in sequence; the outer ends of the truss bars (1-2) are higher than the top surface of the side frame mold, and can form an exposed connection portion after the PCF board (1) is cast and formed; the molding rods and the flat plate sleeve are both fixed on the mold platform by magnetic attraction; the molding rods are used to form through holes on the PCF board (1) after casting and forming.

3. A PCF board single-side formwork construction process according to claim 1, characterized in that: The ground anchor system (2) in step S2 comprises an underground screw rod (2-1), a connecting nut (2-2), an outer connecting rod (2-3) and a butterfly nut; the underground screw rod (2-1) is welded to the steel bars in the floor, and the outer end is tilted upward to ensure that the outer end can be exposed to the outside after the floor is poured; the outer end thread of the underground screw rod (2-1) is connected to the outer connecting rod (2-3) through the connecting nut (2-2); the outer end of the outer connecting rod (2-3) passes through the spacing area between the two pressure beams (9) and is connected and fixed by a nut gasket and a butterfly nut.

4. A PCF board single-side formwork construction process according to claim 1, characterized in that: In the step S4, during the hoisting process of the PCF board (1), multiple groups of cushion blocks are placed in the installation space (3), and the top elevation of each group of cushion blocks is re-measured to ensure that the PCF boards (1) hoisted into the installation space (3) are at the same height as each other; a 5 mm gap is left between two adjacent PCF boards (1), and after the two adjacent PCF boards (1) are installed, the 5 mm gap is filled with structural glue and sealed with a triangular strip.

5. A PCF board single-side formwork construction process according to claim 1, characterized in that: The diagonal rod assembly (4) in step S5 comprises a diagonal brace rod and two supporting connectors; wherein the two supporting connectors are respectively fixed to the corresponding PCF board (1) and the floor by bolts; and the two ends of the diagonal brace rod are respectively hinged to the two supporting connectors.

6. A PCF board single-side formwork construction process according to claim 1, characterized in that: In step S5, after the installation of the diagonal rod assembly is completed, the verticality of the PCF board (1) is checked.

7. A PCF board single-side formwork construction process according to claim 1, characterized in that: The outer end of the reinforcing screw in step S6 is provided with a C-shaped steel clamp (6) matched with the two back-flanged square steels (5); the C-shaped steel clamp (6) is sleeved on the outer rings of the two back-flanged square steels (5), and the relative positions of the two back-flanged square steels (5) are fixed by nuts.

8. The PCF board single-side formwork construction process according to claim 1, characterized in that: In the step S10, the concrete is poured twice during the pouring process, the first pouring height is 1.565m, and the second pouring height is 1.265m.

9. A PCF board single-side formwork construction process according to claim 1, characterized in that: The concrete pouring in step S10 is carried out by tamping as it is poured. The vibrating process is divided into two groups of workers, namely, coarse vibration and fine vibration. The coarse vibration group moves with the pump pipe, and the fine vibration uses a slender high-frequency vibrating rod to vibrate in layers, with fast insertion and slow withdrawal.

10. A PCF board single-side formwork construction process according to claim 1, characterized in that: In step S10, before pouring concrete, a template is fixed above the outer guide wall (11) in the foundation pit on the opposite side of the PCF board (1), and concrete is directly poured on the template through a pump pipe and then flows into the pouring chamber; at the same time, tarpaulin is laid on the outer side and top surface of the PCF board (1).

Images