Metro station cast-in-place concrete side wall large steel formwork supporting system

Abstract

The utility model relates to a subway station cast-in-place concrete side wall large steel formwork supporting system which comprises a bottom plate and a large steel formwork, the bottom plate is provided with a side wall base corresponding to the bottom of a side wall, and a side wall reinforcement cage is bound on the side wall base; the large steel die is arranged on the bearing beam and comprises a large steel die panel, a large steel die support and a cantilever operation platform, the large steel die panel abuts against the side face of the side wall base, the large steel die support is fixed to the back face of the large steel die panel, and the cantilever operation platform is arranged at the top of the large steel die support. The utility model has the beneficial effects that by arranging the bearing beam and the sliding beam structure, the high-precision adjustment of the large steel mould is realized by utilizing the longitudinal jack and the transverse jack, and the sliding resistance can be effectively reduced by fully paving the stainless steel composite plates on the top surface of the bearing beam; three hydraulic rod mounting structures are provided and can be used for solving the problems that a foundation pit inner support exists on a large steel mold, a reverse top plate exists on the large steel mold, and neither the foundation pit inner support nor the reverse top plate exists on the large steel mold.

Description

Technical Field

[0001] The utility model relates to the technical field of municipal engineering, in particular to a large steel formwork support system for the cast-in-place concrete side wall of a subway station. Background Technique

[0002] With the rapid development of subway construction, the construction of the side wall of the main structure of the subway station, as an important part, has received more and more attention. The construction of the side wall of the subway station structure has evolved from the initial wooden formwork assembly construction and small steel formwork construction to large steel formwork construction. Large steel formwork can better control the flatness and verticality of the structure surface, and performs better in terms of economy, aesthetics and environmental protection. Therefore, it is more and more widely used in subway construction projects.

[0003] However, in the existing large steel formwork support construction technology for cast-in-place concrete side walls, there are many technical drawbacks. For example, in the support system designed in the large movable side wall steel formwork support system of 202210359476.9, a sliding frame is arranged between the base and the support frame, and the sliding frame is slidably arranged on the base to drive the steel formwork to move towards the wall. However, considering the large mass of the assembled steel formwork after molding, it is difficult to meet the process requirements of precision adjustment only by the sliding frame without a power source after positioning; another example is the steel formwork designed in the movable assembled side wall steel formwork and its construction method of 201910907652.6, which includes a chassis, an adjustment mechanism, a formwork panel and a measurement module. The adjustment mechanism includes a first adjustment mechanism and a second adjustment mechanism, and the measurement module includes a microcontroller, a first laser measurement module and a second laser measurement module. However, this adjustment mechanism fails to achieve flexible adjustment of the operation platform and effectively ensure the anti-floating performance of the entire side wall steel formwork.

[0004] In view of this, there is an urgent need to invent a side wall large steel formwork support system with strong stability, high transfer efficiency, simple installation and operation, and prominent economic and technical benefits. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a large steel formwork support system for the cast-in-place concrete side wall of a subway station.

[0006] This large steel formwork support system for the cast-in-place concrete side wall of a subway station includes a bottom plate and a large steel formwork. A side wall base is provided at the bottom of the side wall corresponding to the bottom plate, and the side wall steel cage is tied to the side wall base; cushion beams and longitudinal limiting grooves are laid at intervals on the bottom plate. Two groups of longitudinal limiting grooves are laid parallel to the side wall to form a sliding track for the large steel formwork; the cushion beams are laid perpendicular to the side wall between the two groups of longitudinal limiting grooves, and vertical jacks are arranged on the cushion beams.

[0007] The large steel formwork is placed on the cushion beam, including a large steel formwork panel, a large steel formwork bracket and a cantilevered operating platform. The large steel formwork panel is abutted against the side of the side wall base, the large steel formwork bracket is fixed on the back of the large steel formwork panel, and the cantilevered operating platform is arranged on the top of the large steel formwork bracket.

[0008] Preferably, the large steel formwork support is arranged on the back of the large steel formwork panel, and the cantilevered operating platform is arranged on the top of the large steel formwork support. The large steel formwork support includes a support diagonal support, a support vertical support, a support tie support and a support bottom cross support. Several support bottom cross supports are arranged at the bottom of the large steel formwork support, and a pair of directional wheels are arranged at the bottom of each support bottom cross support except the two outermost support bottom cross supports. The two outermost support bottom cross supports are provided with adjusting screw rods, which are arranged vertically, and a sliding beam is fixed at the bottom of the adjusting screw rod, and horizontal jacks are symmetrically arranged on both sides of the sliding beam.

[0009] Preferably, the cushion beam is arranged between mutually parallel longitudinal limit grooves, and the cushion beam is perpendicular to the longitudinal limit grooves but does not intersect, the top surface of the cushion beam is covered with stainless steel composite plates, and the spacing of each group of cushion beams is the same as the spacing of the bottom cross braces of the left and right ends of the single large steel formwork support; the vertical jacks are symmetrically arranged at both ends of the cushion beam, the top surface of which acts on the bottom cross brace of the support, and the bottom surface is provided with a polytetrafluoroethylene plate to act on the cushion beam.

[0010] Preferably, joint dowel bars are reserved at the axil corners of the bottom plate, and the joint dowel bars of the bottom plate are welded to anti-floating tie bars, which are welded to the top of the side wall steel cage after passing the large steel formwork panel upward; anchor bolts with longitudinal limit grooves are embedded in the bottom plate.

[0011] Preferably, sliding beam anchoring ends are symmetrically arranged on the side of the sliding beam, and a pair of cushion beam anchoring ends are arranged on the top surface of the cushion beam; the two ends of the transverse jack are fixedly connected to the sliding beam anchoring end and the cushion beam anchoring end respectively; the transverse jack is used to adjust the horizontal position of the large steel mold.

[0012] Preferably, when there are two parallel side walls and the distance between the two side walls is less than a certain value, a hydraulic trolley is installed between the two side walls for supporting the formwork of the opposite surfaces, embedded bolts are arranged horizontally in the bases of the adjacent side walls, and trolley steel formworks are respectively arranged on both sides of the hydraulic trolley, the trolley steel formworks are abutted against the sides of the side wall base, and the trolley steel formworks are anchored to the embedded bolts.

[0013] Preferably, a concrete surface layer, a retaining pile and a layer are sequentially arranged on the side of the side wall away from the large steel formwork. When there is a support in the foundation pit on the large steel formwork, a clamp is arranged on the support in the foundation pit. The clamp includes a clamp body and a support end plate. The support end plate is arranged at the bottom of the clamp body. A hydraulic rod is arranged between the clamp support end plate and the top surface of the large steel formwork panel.

[0014] When there is an inverted top slab above the large steel formwork, a tie device is installed at the bottom surface of the inverted top slab using anchor bolts. S-shaped connecting hooks are provided at both ends of the tie device, and the S-shaped connecting hooks at both ends are respectively connected to the anchor bolts and the large steel formwork; the large steel formwork support in the large steel formwork is replaced with a bottom support bracket, and support feet are provided at the bottom of the bottom support bracket.

[0015] When there is no internal support in the foundation pit or inverted top slab above the large steel formwork, a corbel support is horizontally arranged on the outside of the concrete surface layer. The corbel support extends horizontally to directly above the large steel formwork, and a hydraulic rod is arranged between the corbel support and the top surface of the large steel formwork panel.

[0016] Preferably, a telescopic channel steel is welded and connected to the side of the cantilever operation platform facing the large steel formwork panel. Pulleys are provided on the telescopic channel steel, and the telescopic channel steel is connected to the vertical strut of the support through the pulleys for adjusting the elevation of the cantilever operation platform. A wooden board is laid on the cantilever operation platform, and plane vertical poles and safety nets are provided on the side of the cantilever operation platform away from the large steel formwork panel.

[0017] The beneficial effects of the present utility model are as follows:

[0018] 1) By setting the cushion beam and sliding beam structures, the present utility model realizes the high-precision adjustment of the large steel formwork by using longitudinal jacks and transverse jacks. The top surface of the cushion beam is fully covered with a stainless steel composite board, which can effectively reduce the sliding resistance. At the same time, the longitudinal limit groove can effectively prevent large-angle deviation when the large steel formwork moves. The overall structure can improve the installation accuracy of the large steel formwork and is easy to operate.

[0019] 2) The present utility model develops a liftable cantilever operation platform. By setting the telescopic channel steel with pulleys, the flexible lifting of the cantilever operation platform is realized, solving the problem of insufficient transportation space of the traditional fixed operation platform for large steel formwork in the underground space, and at the same time ensuring the operability of the hoop and corbel support installation in the present invention.

[0020] 3) By making full use of the existing structure of the subway station foundation pit to set anti-floating tie bars and hydraulic rods, the present utility model effectively solves the problem of the large formwork floating during the concrete pouring process.

[0021] 4) The present utility model proposes three installation structures of hydraulic rods, which can respectively fix the large steel formwork panel by top support for the cases where there is an internal support in the foundation pit, there is an inverted top slab, and there is neither an internal support in the foundation pit nor an inverted top slab above the large steel formwork, further improving the anti-floating effect. Description of the Drawings

[0022] Figure 1 is a schematic diagram of the installation positions of longitudinal and transverse jacks;

[0023] Figure 2 is Figure 1 the enlarged detail drawing of Node A of

[0024] Figure 3 Schematic diagram of the installation position of the longitudinal limiting groove

[0025] Figure 4 Sectional view of the structure of the cantilever operation platform

[0026] Figure 5 is Figure 4 Large-scale detail drawing of Node B

[0027] Figure 6 Top view of the structure of the cantilever operation platform

[0028] Figure 7 Schematic diagram of the structure of the hydraulic rod for the installation of the internal support

[0029] Figure 8 Schematic diagram of the structure of the hydraulic rod for the installation of the bracket corbel

[0030] Figure 9 Schematic diagram of the double-sided formwork support structure

[0031] Figure 10 Schematic diagram of the installation of the reverse construction top plate tie

[0032] Figure 11 Cross-sectional view of the hydraulic trolley

[0033] Figure 12 Longitudinal sectional view of the hydraulic trolley

[0034] In the figure: 1 - large steel formwork panel; 2 - bottom plate; 3 - vertical jack; 4 - cushion beam; 5 - cushion beam anchorage end; 6 - horizontal jack; 7 - sliding beam anchorage end; 8 - sliding beam; 9 - bracket diagonal brace; 10 - bracket vertical brace; 11 - bracket tie brace; 12 - bracket bottom cross brace; 13 - tetrafluoroethylene plate; 14 - stainless steel composite plate; 15 - directional wheel; 16 - longitudinal limiting groove; 17 - pulley; 18 - telescopic channel steel; 19 - wooden board; 20 - platform vertical pole; 21 - dense mesh; 22 - cantilever operation platform; 23 - layer; 24 - side wall steel reinforcement cage; 25 - retaining pile; 26 - concrete surface layer; 27 - ring beam; 28 - hoop main body; 29 - internal support in the foundation pit; 30 - hydraulic rod; 31 - anti-floating tie bar; 32 - embedded bar; 33 - bracket corbel; 34 - tie; 35 - anchor bolt; 36 - reverse construction top plate; 37 - bottom support frame; 38 - support foot; 39 - hydraulic trolley; 40 - trolley steel formwork; 41 - embedded bolt; 42 - side wall foundation; 43 - adjusting screw rod; 44 - adjusting nut; 45 - support end plate. Specific implementation mode

[0035] The following further describes the present utility model in conjunction with embodiments. The description of the following embodiments is only used to help understand the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

[0036] Embodiment 1

[0037] As an embodiment, as Figures 1 to 6 、 Figure 11 and Figure 12 shown, this large steel formwork support system for the cast-in-place concrete side wall of a subway station includes a bottom plate 2 and large steel formworks. A side wall base 42 is provided at the bottom of the side wall corresponding to the bottom plate 2, and a side wall steel reinforcement cage 24 is tied to the side wall base 42.

[0038] As Figures 1 to 3 shown, anchor bolts 35 with longitudinal limiting grooves 16 are embedded in the bottom plate 2. Pad beams 4 and longitudinal limiting grooves 16 are laid on the bottom plate 2 at intervals. Two groups of longitudinal limiting grooves 16 are laid parallel to the side wall to form a sliding track for the large steel formwork; the pad beams 4 are laid perpendicular to the side wall between the two groups of longitudinal limiting grooves 16, and vertical jacks 3 are arranged on the pad beams 4; the pad beams 4 are perpendicular to but do not intersect the longitudinal limiting grooves 16, and the top surface of the pad beams 4 is fully covered with stainless steel composite plates 14. The distance between each group of pad beams 4 is the same as the distance between the bottom cross braces 12 at the left and right ends of the single large steel formwork support; the vertical jacks 3 are symmetrically arranged at both ends of the pad beams 4, with their top surfaces acting on the bottom cross braces 12 and their bottom surfaces provided with tetrafluoroethylene plates 13 acting on the pad beams 4.

[0039] The large steel formwork is placed on the bottom plate 2 and includes a large steel formwork panel 1, a large steel formwork support, and a cantilever operation platform 22. The large steel formwork support is arranged on the back of the large steel formwork panel 1, and the cantilever operation platform 22 is arranged on the top of the large steel formwork support. The large steel formwork support includes a support diagonal brace 9, a support vertical brace 10, a support tie brace 11, and a support bottom cross brace 12; several support bottom cross braces 12 are provided at the bottom of the large steel formwork support, and a pair of directional wheels 15 are provided at the bottom of each support bottom cross brace 12 except for the two outermost support bottom cross braces 12. The directional wheels 15 slide within the track formed by the longitudinal limiting grooves 16.

[0040] The two outermost support bottom cross braces 12 are provided with adjusting screw rods 43. The adjusting screw rods 43 are vertically arranged, and a sliding beam 8 is fixed at the bottom of the adjusting screw rods 43. After the vertical jacks 3 descend, the sliding beam 8 can be placed on the pad beam 4 through the adjusting screw rods 43 for fixed support.

[0041] Transverse jacks 6 are symmetrically arranged on both sides of the sliding beam 8. Specifically, sliding beam anchoring ends 7 are symmetrically arranged on the sides of the sliding beam 8, and a pair of cushion beam anchoring ends 5 are arranged on the top surface of the cushion beam 4; both ends of the transverse jacks 6 are fixedly connected to the sliding beam anchoring ends 7 and the cushion beam anchoring ends 5 respectively; the transverse jacks 6 are used to adjust the horizontal position of the large steel mold.

[0042] The large steel formwork panel 1 is in contact with the side of the side wall base 42 , the large steel formwork bracket is fixed on the back of the large steel formwork panel 1 , and the cantilevered operating platform 22 is arranged on the top of the large steel formwork bracket.

[0043] like Figures 4 to 6 As shown, a telescopic channel steel 18 is welded to the cantilever operating platform 22 on the side facing the large steel formwork panel 1, a pulley 17 is provided on the telescopic channel steel 18, and the telescopic channel steel 18 is connected to the bracket vertical support 10 through the pulley 17, which is used to adjust the elevation of the cantilever operating platform 22, and a wooden board 19 is laid on the cantilever operating platform 22. A flat vertical pole 20 and a dense mesh 21 are provided on the side of the cantilever operating platform 22 away from the large steel formwork panel 1.

[0044] like Figure 11 and Figure 12 As shown, when there are two parallel side walls and the distance between the two side walls is less than a certain value, a hydraulic trolley 39 is installed between the two side walls for supporting the opposite surfaces, and embedded bolts 41 are horizontally arranged in the adjacent side wall bases 42. Trolley steel molds 40 are respectively provided on both sides of the hydraulic trolley 39, and the trolley steel molds 40 are abutted against the sides of the side wall bases 42, and the trolley steel molds 40 are anchored to the embedded bolts 41.

[0045] Embodiment 2

[0046] As another embodiment, this embodiment 2 proposes, based on the embodiment 1, a more specific large steel formwork system for cast-in-place concrete side walls of subway stations, involving a tension-inner support top pressure anti-floating reinforcement technology, such as Figures 7 to 10 shown.

[0047] like Figure 7 and Figure 10 As shown, joint dowels are reserved at the axilla corners of the bottom plate 2, and the joint dowels of the bottom plate 2 are welded with anti-floating tie bars 31. The anti-floating tie bars 31 pass upward around the large steel formwork panel 1 and are welded to the top of the side wall steel cage 24 to press the large steel formwork panel 1 downward.

[0048] A concrete surface layer 26, a retaining pile 25 and a layer 23 are sequentially arranged on the side of the side wall away from the large steel formwork. When there is a foundation pit support 29 on the large steel formwork, a clamp is arranged on the foundation pit support 29. The clamp includes a clamp body 28 and a support end plate 45. The support end plate 45 is arranged at the bottom of the clamp body 28. A hydraulic rod 30 is arranged between the clamp support end plate 45 and the top surface of the large steel formwork panel 1.

[0049] likeFigure 10 As shown, when there is an inverted top plate 36 above the large steel formwork, a tie-in device 34 is installed on the bottom surface of the inverted top plate 36 by means of anchor bolts 35. S-shaped connecting hooks are provided at both ends of the tie-in device 34, and the S-shaped connecting hooks at both ends are respectively connected to the anchor bolts 35 and the large steel formwork; the large steel formwork support in the large steel formwork is replaced by a bottom support 37, and a support foot 38 is provided at the bottom of the bottom support 37.

[0050] As Figure 8 shown, when there is no internal support 29 or inverted top plate 36 in the foundation pit above the large steel formwork, a corbel support 33 is horizontally arranged outside the concrete surface layer 26. The corbel support 33 horizontally extends to directly above the large steel formwork, and a hydraulic rod 30 is arranged between the corbel support 33 and the top surface of the large steel formwork panel 1.

[0051] It should be noted that the same or similar parts in this embodiment and the first embodiment can be referred to each other, and will not be described in detail in this application.

[0052] Each embodiment in this specification is described in a progressive manner. The key points of each embodiment are the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other.

Claims

1. A large steel formwork system for cast-in-place concrete side walls of a subway station, characterized in that: It includes a bottom plate and a large steel formwork. The bottom plate is provided with a side wall base corresponding to the bottom of the side wall, and the side wall steel cage is tied to the side wall base; cushion beams and longitudinal limit grooves are laid at intervals on the bottom plate, and two groups of longitudinal limit grooves are laid parallel to the side wall to form a sliding track for the large steel formwork; the cushion beam is laid perpendicular to the side wall and between the two groups of longitudinal limit grooves, and a vertical jack is arranged on the cushion beam; The large steel formwork is placed on the cushion beam, including a large steel formwork panel, a large steel formwork bracket and a cantilevered operating platform. The large steel formwork panel is abutted against the side of the side wall base, the large steel formwork bracket is fixed on the back of the large steel formwork panel, and the cantilevered operating platform is arranged on the top of the large steel formwork bracket.

2. The large steel formwork system for cast-in-place concrete side walls of subway stations according to claim 1 is characterized in that: The large steel formwork support is arranged on the back of the large steel formwork panel, and the cantilevered operating platform is arranged on the top of the large steel formwork support. The large steel formwork support includes support diagonal braces, support vertical braces, support tie braces and support bottom cross braces; the bottom of the large steel formwork support is provided with several support bottom cross braces, and each support bottom cross brace except the two outermost support bottom cross braces is provided with a pair of directional wheels at the bottom, and the two outermost support bottom cross braces are provided with adjusting screw rods, which are arranged vertically, and a sliding beam is fixed at the bottom of the adjusting screw rod, and horizontal jacks are symmetrically arranged on both sides of the sliding beam.

3. The large steel formwork system for cast-in-place concrete side walls of subway stations according to claim 1 is characterized in that: The cushion beam is arranged between mutually parallel longitudinal limit grooves, and the cushion beam is perpendicular to the longitudinal limit grooves but does not intersect. The top surface of the cushion beam is covered with stainless steel composite plates. The spacing of each group of cushion beams is the same as the spacing of the bottom cross braces of the left and right ends of the single large steel formwork support. The vertical jacks are symmetrically arranged at both ends of the cushion beam, and their top surfaces act on the bottom cross braces of the support, and polytetrafluoroethylene plates are arranged on the bottom surfaces to act on the cushion beams.

4. The large steel formwork system for cast-in-place concrete side walls of subway stations according to claim 1 is characterized in that: Joint dowels are reserved at the axil corners of the bottom plate. The joint dowels of the bottom plate are welded and connected with anti-floating tie bars. The anti-floating tie bars pass around the large steel formwork panel and are welded to the top of the side wall steel cage. Anchor bolts with longitudinal limit grooves are embedded in the bottom plate.

5. The large steel formwork system for cast-in-place concrete side walls of subway stations according to claim 2 is characterized in that: The sliding beam anchoring ends are symmetrically arranged on the side of the sliding beam, and a pair of cushion beam anchoring ends are arranged on the top surface of the cushion beam; the two ends of the transverse jack are respectively fixedly connected with the sliding beam anchoring end and the cushion beam anchoring end; the transverse jack is used to adjust the horizontal position of the large steel mold.

6. The large steel formwork system for cast-in-place concrete side walls of subway stations according to claim 4 is characterized in that: When there are two parallel side walls and the distance between the two side walls is less than a certain value, a hydraulic trolley is installed between the two side walls for supporting the formwork of the opposite surfaces. Embedded bolts are arranged horizontally in the bases of the adjacent side walls. Trolley steel formworks are respectively arranged on both sides of the hydraulic trolley. The trolley steel formworks are abutted against the sides of the side wall base, and the trolley steel formworks are anchored to the embedded bolts.

7. The large steel formwork system for cast-in-place concrete side walls of subway stations according to claim 1 is characterized in that: The side wall away from the large steel formwork is provided with a concrete surface layer, a retaining pile and a layer in sequence. When there is a support in the foundation pit on the large steel formwork, a clamp is provided on the support in the foundation pit. The clamp includes a clamp body and a support end plate. The support end plate is provided at the bottom of the clamp body. A hydraulic rod is provided between the clamp support end plate and the top surface of the large steel formwork panel. When there is a reverse top plate above the large steel formwork, a tie-down device is installed on the bottom surface of the reverse top plate by means of anchor bolts, and S-shaped connecting hooks are arranged at both ends of the tie-down device, and the S-shaped connecting hooks at both ends are respectively connected to the anchor bolts and the large steel formwork; the large steel formwork support in the large steel formwork is replaced by a bottom support frame, and a supporting foot is arranged at the bottom of the bottom support frame; When there is no support in the foundation pit or the top plate is made inversely above the large steel formwork, a corbel bracket is horizontally arranged on the outside of the concrete surface layer. The corbel bracket extends horizontally to just above the large steel formwork, and a hydraulic rod is arranged between the corbel bracket and the top surface of the large steel formwork panel.

8. The large steel formwork system for cast-in-place concrete side walls of subway stations according to claim 1 is characterized in that: A telescopic channel steel is welded and connected to the side of the cantilever operating platform facing the large steel formwork panel. A pulley is provided on the telescopic channel steel. The telescopic channel steel is connected to the vertical support of the bracket through the pulley and is used to adjust the elevation of the cantilever operating platform. Wooden boards are laid on the cantilever operating platform. A flat vertical pole and a dense mesh are provided on the side of the cantilever operating platform away from the large steel formwork panel.

Images