Formwork device for construction of shear walls on two sides of narrow expansion joint and construction method

Abstract

The invention discloses a construction formwork device for shear walls on the two sides of a narrow expansion joint and a construction method. The construction formwork device is applied to narrow adjacent shear wall construction. The formwork device comprises a track steel beam, an inner formwork structure, a movable carrier, an outer formwork structure and an opposite-pull screw assembly. The track steel beams are perpendicular to the length direction of the expansion joint; the inner formwork structure comprises a left side inner formwork, a right side inner formwork and a jacking assembly. According to the width of the expansion joint, the distance between the left side inner formwork and the right side inner formwork is adjusted through the jacking assembly; a movable carrier is fixed at the top end of each of the left inner template and the right inner template; the opposite-pull screw rod assembly is connected between the outer template structure and the inner template structure; the split bolt assembly is detached from the outer formwork structure side. Not only is the erection of the shear wall template at the narrow expansion joint simplified, but also the construction quality of the shear wall at the narrow expansion joint can be improved, and the construction efficiency of the shear wall at the narrow expansion joint is improved; the problems that the expansion joint distance is short, and the formwork dismantling difficulty is large are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of building construction, in particular to a construction formwork device for shear walls on both sides of a narrow expansion joint and a construction method. BACKGROUND

[0002] Due to the close distance between the expansion joints of the building, the mechanical and personnel operation is inconvenient, the installation of the shear wall formwork is difficult, and it is not easy to reinforce. The formwork is easy to burst during the pouring of concrete, causing loss of concrete and labor. The large joint of the formwork is easy to cause the leakage of the slurry, forming the honeycomb and the quality problem of the rough surface. During the installation of the formwork, the perpendicularity and flatness are not easy to guarantee, and the formwork is easy to expand. SUMMARY

[0003] In view of the above defects in the prior art, a construction formwork device for shear walls on both sides of a narrow expansion joint and a construction method are provided, which simplify the construction process of the shear walls on both sides of the expansion joint and improve the construction quality.

[0004] The technical scheme adopted by the present application to solve the above technical problems is: The construction formwork device for shear walls on both sides of a narrow expansion joint, the expansion joint is the space between two floor slabs, and shear walls are arranged on both sides of the expansion joint below the floor slabs; the construction formwork device for shear walls on both sides of a narrow expansion joint is applied to the construction of narrow adjacent shear walls; the formwork device comprises a track steel beam, the track steel beam is arranged vertically to the length direction of the expansion joint, and the track steel beam is supported on an external floor slab support system; an inner formwork structure, the inner formwork structure comprises a left inner formwork, a right inner formwork and a top support assembly, the left inner formwork is attached to the side of the left shear wall close to the expansion joint, the right inner formwork is attached to the side of the right shear wall close to the expansion joint, and the top support assembly is fixedly connected between the left inner formwork and the right inner formwork; the distance between the left inner formwork and the right inner formwork is adjusted by the top support assembly according to the width of the expansion joint; a mobile carrier, one mobile carrier is fixedly arranged at the top end of the left inner formwork and the right inner formwork respectively, and the mobile carriers run on the track steel beam; the distance between the two mobile carriers is adjusted according to the size of the expansion joint, and the parking position of the mobile carriers on the track steel beam is determined according to the designed position of the shear wall; an outer formwork structure, the outer formwork structure is arranged on the side of the two shear walls away from the expansion joint; a tension screw rod assembly, the tension screw rod assembly is connected between the outer formwork structure and the inner formwork structure; the inner side end of the tension screw bolt assembly is threadedly connected to the inner formwork structure, the tension screw bolt assembly is rotated, and the tension screw bolt assembly is removed from the outer formwork structure side.

[0005] According to the technical scheme, the left inner formwork and the right inner formwork comprise a plurality of standard formworks and reinforced channel steel structures; on the standard formwork, one side edge of any two opposite side edges is provided with a U-shaped protrusion, and the other side edge is provided with a U-shaped groove matched with the U-shaped protrusion; the standard formworks are spliced into a plate-shaped structure matched with the side surface of the shear wall through the U-shaped protrusion and the U-shaped groove; the reinforced channel steel structures are fixed to the outer side surface of the plate-shaped structure and connect all the standard formworks into a whole; the top of the reinforced channel steel structure is fixed to the moving carrier, and the two ends of the bracing assembly are connected to the reinforced channel steel structures of the two side formworks.

[0006] According to the technical scheme, the standard formwork and the reinforced channel steel structure are in a split structure; the reinforced channel steel structure comprises a plurality of transverse channel steels and a plurality of longitudinal channel steels, and according to the size of the shear wall, the plurality of longitudinal channel steels and the plurality of transverse channel steels are fixedly connected into a grid net-shaped structure through fasteners, the grid net-shaped structure is fixed to the plate-shaped structure through fasteners, and the top of the grid net-shaped structure is fixed to the moving carrier.

[0007] According to the technical scheme, the reinforced channel steel structure comprises a plurality of independent reinforced channel steel units, one reinforced channel steel unit and one standard formwork are fixedly connected to form an integrated standard splicing piece. The reinforced channel steel unit comprises at least one transverse channel steel and at least one longitudinal channel steel; the transverse channel steel and the longitudinal channel steel are perpendicular to each other and are fixed to the standard formwork as a standard splicing piece; the transverse channel steel or the longitudinal channel steel between the two adjacent standard splicing pieces is provided with a socket joint matched with each other; the bracing structure is fixedly connected to the corresponding standard splicing pieces of the two side formworks, and the connection point of the bracing structure is located at the vertical intersection point of the transverse channel steel and the longitudinal channel steel.

[0008] According to the technical scheme, the length of the standard formwork is consistent with the width of the shear wall, and the left inner formwork and the right inner formwork are both spliced up and down by a plurality of standard formworks; each standard formwork is provided with one group of transverse channel steels and two groups of vertical channel steels, and the transverse channel steel and the longitudinal channel steel are provided with two intersection points on the standard formwork; a gasket is arranged at the intersection point and is fixed to the transverse channel steel and the longitudinal channel steel by fasteners, and the bracing assembly is supported on the gasket of the two side formworks.

[0009] According to the technical scheme, the bracing assembly comprises a plurality of groups of linked hydraulic jacks, a linked control line and a linked control box, the linked hydraulic jacks are supported on the gaskets of the two side formworks, all the linked hydraulic jacks are connected to the linked control box through the linked control line, and the linked control box controls the synchronous jacking, stopping or pressure relief of all the linked hydraulic jacks. The linked control box has three buttons of jacking, stopping and pressure relief.

[0010] According to the technical scheme, the first nut is fixed on the inner formwork structure, and the first through hole corresponding to the first nut is arranged on the outer formwork structure. The pair of pull screw assemblies comprise sleeves and pull screws, the sleeves are arranged between the inner formwork structure and the outer formwork structure, the inner end of the pull screw is threadedly connected to the first nut, the middle part of the pull screw passes through the sleeve, and the outer end of the pull screw passes through the first through hole and is locked by the locking nut; the sealing structure is arranged between the sleeve and the inner formwork structure and between the sleeve and the outer formwork structure.

[0011] According to the technical scheme, at least two track steel beams are arranged in parallel. The track and the limiting plate are arranged on the track steel beam, the moving carrier moves on the track, and is parked at the current position by the limiting plate.

[0012] According to the technical scheme, the moving carrier comprises a vehicle body, a plurality of rollers rotatably connected to the vehicle body, a groove-shaped sliding block fixed to the vehicle body, and a brake bolt threadedly connected to the groove-shaped sliding block; the vehicle body is fixedly connected to the inner formwork structure; the limiting plate has the same length as the track and is arranged in parallel with the track; the groove-shaped sliding block has a concave-convex structure, the groove-shaped sliding block is reversely connected to the limiting plate when the moving carrier is arranged on the track of the steel beam, and slides on the limiting plate; the brake bolt is arranged on one side of the concave-convex structure, the brake bolt is arranged perpendicularly to the limiting plate, and a brake pad is arranged at the end of the brake bolt; when the brake bolt is tightened, the brake pad and the other side of the concave-convex structure of the groove-shaped sliding block are clamped on both sides of the limiting plate, so that the moving carrier is parked.

[0013] In the second aspect, the method for constructing shear walls on both sides of a narrow expansion joint adopts the construction formwork device for shear walls on both sides of a narrow expansion joint as described in any of the above aspects; the method comprises The number of standard formworks is determined, and the inner formwork structure is assembled; The inner formwork structure, the moving carrier and the track steel beam are assembled into an inner formwork integral structure, and the inner formwork integral structure is hoisted to the expansion joint, and the track steel beam is supported on the external floor support system on both sides of the expansion joint; The distance between the left inner formwork and the right inner formwork is adjusted by the bracing assembly according to the distance of the expansion joint; The outer formwork structure is assembled, and the inner formwork structure and the outer formwork structure are fixedly connected by the pair of pull screw assemblies to form a formwork main body; The concrete of the shear wall is poured, the pair of pull screw assemblies are disassembled from the outer formwork structure after the concrete is finally cured, and then the inner formwork integral structure is hoisted.

[0014] The present application has the following advantages: 1. The inner formwork is supported on the outer floor support system above the expansion joint by rail steel beams and mobile carriers, the left and right inner formworks are adjusted in spacing by the jacking assembly, and the left and right inner formworks are supported at the set position. Then the inner formwork structure and the outer formwork structure are connected into a whole by the pull rod assembly which can be detached from the outer formwork structure, and the formwork support for the shear wall is completed. After the concrete of the shear wall is finally cured, the outer formwork structure and the pull rod assembly are first detached, and then the inner formwork structure, the mobile carrier and the rail steel beam are hoisted out as a whole.

[0015] Based on the above structure, not only the formwork support of the shear wall at the narrow expansion joint is simplified, but also the construction quality and efficiency of the shear wall at the narrow expansion joint are improved. In addition, after the shear wall reaches the form removal condition, the outer formwork structure and the pull rod assembly are first detached from the outside, and then the formwork can be hoisted away after the lifting steel beam is hoisted and the force is released, avoiding the problem that the distance between the expansion joints is short and the formwork is difficult to remove.

[0016] 2. Two types of inner formwork structures are provided to meet the use requirements of different scenes and improve the universality of the device. The inner formwork structure is qualitatively produced and spliced quickly, and can be assembled in length and height according to different specifications of the wall on site, reused and cost-saving.

[0017] 3. The jacking assembly adopts multiple linked hydraulic jacks which are evenly distributed between the left and right inner formworks. By adjusting all the linked hydraulic jacks to be synchronously jacked, stopped or relieved, the device is quickly applicable to the change of the distance between the expansion joints, making the support of the inner formwork structure quick and rapid and applicable to expansion joints of different widths. In addition, after the multiple linked hydraulic jacks are positioned, the left and right inner formworks of the inner formwork structure are fixed firmly and are not easy to deform, which can effectively ensure the perpendicularity and flatness of the wall surface.

[0018] The above description is only a summary of the technical scheme of the present application. In order to more clearly understand the technical means of the present application and can be implemented according to the content of the specification, the following will be described in detail with the preferred embodiments of the present application and the accompanying drawings. The specific embodiments of the present application are given in detail by the following examples and their accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings described herein are used to provide further understanding of the present application, constitute a part of this application, and the schematic embodiments of the present application and their explanations are used to explain the present application, and do not constitute an improper limitation on the present application.

[0020] Fig. 1 is a structural schematic diagram of the embodiments provided by the present application; Fig. 2This is a structural schematic diagram of an embodiment of the present invention (outer template structure for demolding and tie rod assembly). Fig. 3 This is the main view of the inner template provided in the embodiment of the present invention; Fig. 4 This is a side view of the inner template provided in an embodiment of the present invention; Fig. 5 This is a schematic diagram of the control of the top support component according to an embodiment of the present invention; Fig. 6 This is a schematic diagram of the connection between the vertical channel steels provided in an embodiment of the present invention; Fig. 7 This is a schematic diagram of the structure of the mobile vehicle on the track steel beam according to an embodiment of the present invention; Fig. 8 This is a schematic diagram of the structure of the first nut on a vertical or horizontal channel steel according to an embodiment of the present invention; In the diagram, 1. Expansion joint; 2. Floor slab; 3. Shear wall; 4. Track steel beam; 4-1. Track; 4-2. Limiting plate; 5. Inner formwork structure; 5a. Left inner formwork; 5b. Right inner formwork; 5c. Top support assembly; 5-1. Standard formwork; 5-2. Horizontal channel steel; 5-3. Vertical channel steel; 5-4. Pad plate; 5-5. Linked hydraulic jack; 5-6. Linked control line; 5-7. Dynamic control box; 6. Mobile vehicle; 6-1. Vehicle body; 6-2. Roller; 6-3. Channel-shaped slider; 6-4. Brake bolt; 7. Outer formwork structure; 8. Tie rod assembly; 9. First nut. Detailed Implementation

[0021] The following is in conjunction with the appendix Figs. 1-8 The principles and features of the present invention are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention. The invention is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the invention will become clearer from the following description and claims. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0022] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. The use herein of the terms "and / or" includes a set of one or more associated listed items.

[0024] Referring to Figs. 1-8 As shown in the drawings, the narrow expansion joint two sides of the shear wall construction formwork device is provided.

[0025] Embodiment 1 The expansion joint 1 is the space between two floors 2, and the shear walls 3 are arranged on the two sides of the expansion joint below the floor; the narrow expansion joint two sides of the shear wall construction formwork device is applied to the narrow adjacent shear wall construction; the formwork device comprises A track steel beam 4 is arranged perpendicular to the length direction of the expansion joint, and the track steel beam is supported on the external floor support system; An inner formwork structure 5 comprises a left inner formwork 5a, a right inner formwork 5b, and a top support assembly 5c, the left inner formwork is attached to the side of the left shear wall close to the expansion joint, the right inner formwork is attached to the side of the right shear wall close to the expansion joint, and the top support assembly is fixedly connected between the left inner formwork and the right inner formwork; according to the width of the expansion joint, the distance between the left inner formwork and the right inner formwork is adjusted by the top support assembly; A mobile carrier 6 is fixed at the top of the left inner formwork and the right inner formwork, respectively, and the mobile carrier travels on the track steel beam; according to the size of the expansion joint, the distance between the two mobile carriers is adjusted, and the parking position of the mobile carrier on the track steel beam is determined according to the design position of the shear wall; the left inner formwork is fixedly connected to the left mobile carrier, the right inner formwork is fixedly connected to the right mobile carrier, and the distance between the left and right inner formworks is adjusted by the top support assembly; the position of the entire inner formwork structure is controlled by the mobile carrier.

[0026] An outer formwork structure 7 is arranged on the side of the two shear walls away from the expansion joint; A tension screw assembly 8 is connected between the outer formwork structure and the inner formwork structure; the inner side end of the tension screw assembly is threadedly connected to the inner formwork structure, the tension screw assembly is rotated, and the tension screw assembly is removed from the outer formwork structure side.

[0027] In the above structure, the inner formwork is supported on the outer floor support system above the expansion joint by the rail steel beam and the moving carrier, the left inner formwork and the right inner formwork are adjusted in spacing by the jacking assembly, and the left inner formwork and the right inner formwork are supported at the set position. Then the inner formwork structure and the outer formwork structure are connected into a whole by the pull screw assembly which can be detached from the side of the outer formwork structure, and the formwork support for the shear wall is completed. After the concrete of the shear wall is finally cured, the outer formwork structure and the pull screw assembly are first detached, and then the inner formwork structure, the moving carrier and the rail steel beam are hoisted out as a whole from the expansion joint.

[0028] Based on the above structure, not only the formwork support for the shear wall at the narrow expansion joint is simplified, but also the construction quality and efficiency of the shear wall at the narrow expansion joint are improved.

[0029] On the basis of embodiment 1, the preferred inner formwork structure adopts a modular structure, which can be applied to the construction of shear walls of various sizes and specifications, and can be reused to reduce costs.

[0030] Specifically, the left inner formwork and the right inner formwork include a plurality of standard formworks and reinforced channel steel structures; on the standard formwork, one side of any two opposite sides is provided with a U-shaped protrusion, and the other side is provided with a U-shaped groove matched with the U-shaped protrusion; the standard formworks are spliced into a plate-shaped structure matched with the side surface of the shear wall through the U-shaped protrusion and the U-shaped groove; the reinforced channel steel structure is fixed to the outer side of the plate-shaped structure and connects all the standard formworks into a whole; the top of the reinforced channel steel structure is fixed to the moving carrier, and the two ends of the jacking assembly are connected to the reinforced channel steel structures of the two side formworks.

[0031] The standard formworks are clamped and locked through the U-shaped protrusion and the U-shaped groove, and are reinforced to prevent slurry leakage. In addition, the use of the reinforced channel steel structure to connect all the standard formworks on the single inner formwork into a whole can improve the strength of the formwork and prevent the formwork from running.

[0032] Based on the above structure, the standard formwork and the reinforced channel steel structure have two forms: First, the standard formwork and the reinforced channel steel structure are separately arranged, and the reinforced channel steel structure is fixed to the standard formwork during construction to complete the assembly and fixed connection of the standard formwork.

[0033] The standard formwork and the reinforced channel steel structure are separate structures; the reinforced channel steel structure includes a plurality of transverse channel steels and a plurality of longitudinal channel steels, and according to the size of the shear wall, the plurality of longitudinal channel steels and the plurality of transverse channel steels are fixedly connected into a grid net-shaped structure through fasteners, the grid net-shaped structure is fixed to the plate-shaped structure through fasteners, and the top of the grid net-shaped structure is fixed to the moving carrier.

[0034] The second kind is an integrated structure of the standard template and the reinforcing channel steel. The reinforcing channel steel is connected during construction, and the splicing between the standard templates is completed.

[0035] The reinforcing channel steel structure comprises a plurality of independent reinforcing channel steel units. One reinforcing channel steel unit and one standard template are fixedly connected to form an integrated standard splicing piece. The reinforcing channel steel unit comprises at least one transverse channel steel and at least one longitudinal channel steel. The transverse channel steel and the longitudinal channel steel are perpendicular to each other and are fixed on the standard template as a standard splicing piece. The transverse channel steel or the longitudinal channel steel between two adjacent standard splicing pieces is provided with a socket joint matched with each other. The bracing structure is fixedly connected to the corresponding standard splicing pieces of the two side inner templates, and the connecting point of the bracing structure is located at the vertical intersection point of the transverse channel steel and the longitudinal channel steel. After the transverse channel steel of one side standard splicing piece is inserted into the socket joint of the transverse channel steel of the other side standard splicing piece, the two transverse channel steels are connected into one whole through fasteners, so as to realize the fixed connection between the two standard splicing pieces. Alternatively, after the longitudinal channel steel of one side standard splicing piece is inserted into the socket joint of the longitudinal channel steel of the other side standard splicing piece, the two longitudinal channel steels are connected into one whole through fasteners, so as to realize the fixed connection between the two standard splicing pieces.

[0036] In the present application, two kinds of inner template structures are provided to meet the use requirements of different scenes and improve the universality of the device.

[0037] Embodiment 2 On the basis of the above-mentioned embodiment 1, the preferred inner template structure is given based on the second kind of implementation of the standard template and the reinforcing channel steel structure.

[0038] As shown in the figure, the length of the standard template is consistent with the width of the shear wall, and the left inner template and the right inner template are both formed by splicing a plurality of standard templates 5-1 up and down. A group of transverse channel steels 5-2 and two groups of vertical channel steels 5-3 are arranged on each standard template. The transverse channel steel and the longitudinal channel steel are provided with two intersection points on the standard template. A pad 5-4 is arranged at the intersection point. The pad is fixed on the transverse channel steel and the longitudinal channel steel by fasteners. A bracing assembly is supported on the pads of the two side inner templates.

[0039] The bracing assembly comprises a plurality of groups of linked hydraulic jacks 5-5, a linked control line 5-6, and a linked control box 5-7. The linked hydraulic jacks are supported on the pads of the two side inner templates. All the linked hydraulic jacks are connected to the linked control box through the linked control line and are controlled by the linked control box to synchronously jack up, stop, or release pressure. The linked control box has three buttons of jacking, stopping, and releasing pressure.

[0040] After the assembly of the inner formwork structure is completed by the linkage hydraulic jack, the inner formwork structure is connected to the track steel beam through the moving carrier. After the assembly is completed, the moving carrier is switched to the parking state, and the track steel beam is lifted to the expansion joint by the hoisting equipment. After the track steel beam is placed stably, the moving carrier is switched to the running state. When the jacking button of the linkage control box is pressed, all the linkage control hydraulic jacks operate simultaneously, and the left and right inner formworks are opened. The moving carrier rolls to the left and right sides until the left and right inner formworks reach the width inside the expansion joint. Then, the stop button of the linkage control box is pressed, and the moving carrier is switched to the parking state to prevent the formwork from moving.

[0041] Embodiment 3 On the basis of Embodiment 1 or 2, a preferred structure of the pull screw is given, specifically, a first nut 9 is fixed on the inner formwork structure, and a first through hole corresponding to the first nut is arranged on the outer formwork structure; the first nut is fixed on the transverse channel steel and the longitudinal channel steel. After the installation of the inner formwork structure, the height of each row of first nuts on the transverse channel steel from the ground is measured by a tape measure, and the horizontal position of the first nut is marked on the ground by using a theodolite or a plummet. When the outer formwork is installed, the height of the first through hole corresponding to the first nut is marked on the outer formwork structure by using a tape measure, and the mark on the ground is positioned on the outer formwork structure by using a theodolite or a plummet. Thus, the position of the first through hole on the outer formwork structure is determined, and the hole is punched.

[0042] The pull screw assembly includes a sleeve and a pull screw. The sleeves are arranged between the inner formwork structure and the outer formwork structure. The inner end of the pull screw is threadedly connected to the first nut, the middle part passes through the sleeve, and the outer end passes through the first through hole and is locked by a locking nut. A sealing structure is arranged between the sleeve and the inner formwork structure and between the sleeve and the outer formwork structure. The sealing structure is a mature existing structure, which is not described here.

[0043] The first nut is welded to the transverse channel steel and the longitudinal channel steel. The pull screw is provided with a pad plate and a locking nut on the outer side of the shear wall outer formwork structure, and the locking nut is tightened to connect and fix the outer formwork structure. During the pouring of concrete, the pull screw is fixed in the channel steel, and the position is accurate. It is convenient to observe. It can prevent the vibration rod from touching the screw and causing the formwork to burst open.

[0044] When the inner formwork and the outer formwork are fixed by the pull screw assembly, due to the arrangement of the sleeve, the part of the pull screw in the concrete area of the shear wall is located in the sleeve, which is isolated from the concrete to avoid the pull screw from being solidified in the sleeve. After the shear wall is finally cured, the locking nut at the outer end of the pull screw is removed first, then the pull screw is rotated to be unscrewed from the first nut of the inner formwork structure, and finally the pull screw is taken out from the sleeve, thereby contacting the fixed connection between the inner formwork structure and the outer formwork structure.

[0045] In embodiments 1-3, at least two track steel beams are provided, and the two track steel beams are arranged in parallel; The track 4-1 and the limiting plate 4-2 are arranged on the track steel beam and used for linear movement of the walking mechanism; the moving carrier moves on the track, and is parked at the current position by the limiting plate.

[0046] The moving carrier comprises a vehicle body 6-1, a plurality of rollers 6-2 rotatably connected to the vehicle body, a groove-shaped sliding block 6-3 fixed to the vehicle body, and a brake bolt 6-4 threadedly connected to the groove-shaped sliding block; the vehicle body is fixedly connected to the inner formwork structure; the limiting plate has the same length as the track and is arranged in parallel with the track; the groove-shaped sliding block has a concave structure, and when the moving carrier is placed on the track steel beam, the groove-shaped sliding block is reversely connected to the limiting plate and slides on the limiting plate; the brake bolt is screw-connected to one side of the concave structure, is arranged perpendicularly to the limiting plate, and has a brake pad at the end of the brake bolt; when the brake bolt is tightened, the brake pad and the other side of the concave structure of the groove-shaped sliding block are clamped on both sides of the limiting plate, so that the moving carrier is parked.

[0047] The groove-shaped sliding block is reversely connected to the hoisting limiting plate, bolt holes are formed in the side edges of the groove-shaped sliding block, the brake bolt is rotated inward, the groove-shaped sliding block is tightly pressed by the brake pad, and thus the sliding of the rollers is blocked. The brake bolt is rotated outward, the groove-shaped sliding block is loosened, and the rollers can freely slide on the track steel beam.

[0048] The present application also provides a construction method of shear walls on both sides of a narrow expansion joint, which adopts the construction formwork device of shear walls on both sides of a narrow expansion joint as described above. S1: determining the number of standard formworks and assembling the inner formwork structure; specifically, according to the design drawing, the length and height of the left and right inner formworks are calculated to determine the number of required standard formworks, the number of fittings, the length of the linkage line, and the layout and pre-assembly work are completed. The two ends of the linkage hydraulic jack are fixed to the pads of the left and right inner formworks through fastening bolts and gaskets. After the standard formworks on the same side are reversely connected through the horizontal channel steel or the vertical channel steel and are fixedly connected through fastening members, the assembly and connection actions are repeated to meet the width and height requirements of the inner formwork in the design drawing. The control lines of the linkage hydraulic jack are arranged vertically along the inner side of the channel steel, each hydraulic jack is connected in series through the linkage control lines, and is connected to the linkage control box.

[0049] S2: Assemble the inner formwork structure, the moving carrier and the track steel beam into an inner formwork whole structure, and hoist it to the expansion joint. The track steel beam is supported on the external floor support system on both sides of the expansion joint. The assembled inner formwork structure is fixedly connected to the vehicle body of the moving carrier through bolts, and the moving carrier is slidingly connected to the track steel beam. Then, the state of the moving carrier on the track steel beam is adjusted to a stop state, and the inner formwork whole structure assembled by the inner formwork structure, the moving carrier and the track steel beam is hoisted to the expansion joint as a whole according to the pre-measured line, and preliminary positioning is performed.

[0050] S3: According to the distance of the expansion joint, the distance between the left inner formwork and the right inner formwork is adjusted by the bracing assembly. After the connection of each linkage hydraulic jack to the control box through the linkage control line is completed, the state of the moving carrier on the track steel beam is adjusted to a walking state, and then the power of the control box is started to make the linkage jacks open the left and right inner formworks to the designed distance. After that, the state of the moving carrier on the track steel beam is adjusted to a stop state.

[0051] S4: Assemble the outer formwork structure, and fixedly connect the inner formwork structure and the outer formwork structure through the tension bolt assembly to form the formwork main body. The first nut on the inner formwork is placed on the outer formwork to perform hole opening through a tape measure and a theodolite or a plummet. The first through hole on the outer formwork is basically flush with the first nut on the inner formwork. When the tension bolt is inserted into the first nut on the inner formwork, it should exceed a certain distance. The outer formwork is fixedly connected to the inner formwork through the tension bolt to perform positioning.

[0052] S5: Pour the concrete of the shear wall. After the concrete is finally cured, the tension bolt assembly is disassembled from the outer formwork structure side. Then, the inner formwork whole structure is hoisted. After the formwork assembly and reinforcement are completed, the concrete is poured. Since the end of the tension bolt is in the reinforcing channel steel, the position is relatively clear, which can avoid the tension bolt from being touched by the vibration rod when the vibration rod vibrates, and avoid the tension bolt from being broken or displaced, thereby ensuring the integrity of the formwork. After the concrete strength reaches the demolding condition, the tension bolt assembly is disassembled from the outer formwork structure side. Then, the state of the moving carrier on the track steel beam is adjusted to a walking state, the linkage jacks are retracted by operating the linkage control box to release the force, and finally the state of the moving carrier on the track steel beam is adjusted to a stop state. The inner formwork whole structure assembled by the inner formwork structure, the moving carrier and the track steel beam is adjusted away from the expansion joint as a whole by the hoisting equipment.

[0053] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form; any person skilled in the art can easily implement the present application according to the drawings and the above description; however, any person skilled in the art can make some changes, modifications and equivalent changes within the scope of the technical solutions of the present application, and the equivalent embodiments of the present application are still within the protection scope of the technical solutions of the present application.

Claims

1. A formwork device for constructing shear walls on both sides of a narrow expansion joint, wherein the expansion joint is the space between two floor slabs, and shear walls are provided below the floor slabs and on both sides of the expansion joint; characterized in that: A formwork device for constructing shear walls on both sides of a narrow expansion joint is used in the construction of narrow adjacent shear walls; the formwork device includes... The track steel beams are arranged perpendicular to the length of the expansion joint and are supported on the external floor slab support system. The internal formwork structure includes a left inner formwork, a right inner formwork, and a top support assembly. The left inner formwork is attached to the side of the left shear wall near the expansion joint, and the right inner formwork is attached to the side of the right shear wall near the expansion joint. The top support assembly is fixedly connected between the left and right inner formworks. The spacing between the left and right inner formworks is adjusted by the top support assembly according to the width of the expansion joint. The mobile carriers are fixed at the top of the left and right inner formwork respectively, and the mobile carriers travel on the track steel beams. The distance between the two mobile carriers is adjusted according to the size of the expansion joint, and the stopping position of the mobile carriers on the track steel beams is determined by the design position of the shear wall. The external formwork structure is supported on the side of the shear walls away from the expansion joints on both sides. The tie rod assembly is connected between the outer template structure and the inner template structure; the inner end of the tie bolt assembly is threaded onto the inner template structure. By rotating the tie bolt assembly, the tie bolt assembly can be removed from the outer template structure side.

2. The formwork device for constructing shear walls on both sides of a narrow expansion joint according to claim 1, characterized in that: The left and right inner formworks include several standard formworks and a reinforcing channel steel structure. On any two opposite sides of the standard formwork, one side has a U-shaped protrusion, and the other side has a U-shaped groove that matches the U-shaped protrusion. The standard formworks are spliced ​​together by the U-shaped protrusion and the U-shaped groove to form a plate-like structure that matches the side of the shear wall. The reinforcing channel steel structure is fixed to the outer side of the plate-like structure and connects all the standard formworks into a whole. The top of the reinforcing channel steel structure is fixed to the moving vehicle, and the two ends of the top support assembly are connected to the reinforcing channel steel structure of the two side formworks.

3. The formwork device for constructing shear walls on both sides of a narrow expansion joint according to claim 2, characterized in that: The standard template and the reinforced channel steel structure are separate structures. The reinforced channel steel structure includes several transverse channel steels and several longitudinal channel steels. According to the size of the shear wall, the longitudinal channel steels and several transverse channel steels are fixedly connected by fasteners to form a grid structure. The grid structure is fixed to the plate structure by fasteners, and the top of the grid structure is fixed to the mobile vehicle.

4. The formwork device for constructing shear walls on both sides of a narrow expansion joint according to claim 2, characterized in that: The reinforced channel steel structure consists of several independent reinforced channel steel units. Each reinforced channel steel unit and a standard template are fixedly connected to form an integrated standard splice. The reinforced channel steel unit includes at least one transverse channel steel and at least one longitudinal channel steel; the transverse and longitudinal channel steels are perpendicular to each other and fixed on the standard template as a standard splice; the transverse or longitudinal channel steels between two adjacent standard splices are provided with matching socket joints; the top support structure is fixedly connected to the corresponding standard splices on the inner templates on both sides, and the connection point of the top support structure is located at the perpendicular intersection of the transverse and longitudinal channel steels.

5. The formwork device for constructing shear walls on both sides of a narrow expansion joint according to claim 2 or 4, characterized in that: The length of the standard template is the same as the width of the shear wall. The left and right inner templates are both made by splicing several standard templates together. Each standard template has a set of horizontal channel steel and two sets of vertical channel steel. The horizontal and vertical channel steels have two intersection points on the standard template. A pad is provided at the intersection point. The pad is fixed to the horizontal and vertical channel steels by fasteners. The top support assembly is supported on the pad of the inner template on both sides.

6. The formwork device for constructing shear walls on both sides of a narrow expansion joint according to claim 5, characterized in that: The top support assembly includes several sets of linked hydraulic jacks, linkage control lines, and a linkage control box. The linked hydraulic jacks are supported on the pads of the inner templates on both sides. All linked hydraulic jacks are connected to the linkage control box through the linkage control lines. The linkage control box controls the synchronous lifting, stopping, or depressurization of all linked hydraulic jacks.

7. The formwork device for constructing shear walls on both sides of a narrow expansion joint according to any one of claims 1-6, characterized in that: A first nut is fixedly provided on the inner template structure, and a first through hole corresponding to the first nut is provided on the outer template structure; The tie rod assembly includes sleeves and tie rods. Several sleeves are placed between the inner template structure and the outer template structure. The inner end of the tie rod is threaded to the first nut, the middle part passes through the sleeve, and the outer end passes through the first through hole and is locked by the locking nut. A sealing structure is provided between the sleeve and the inner template structure, and between the sleeve and the outer template structure.

8. The formwork device for constructing shear walls on both sides of a narrow expansion joint according to any one of claims 1-6, characterized in that: At least two track steel beams are provided, and the two track steel beams are arranged in parallel; The track and limit plate are provided on the steel beam for the linear movement of the traveling mechanism; the moving vehicle moves on the track and stops at the current position by the limit plate.

9. The formwork device for constructing shear walls on both sides of a narrow expansion joint according to claim 8, characterized in that: The mobile vehicle includes a vehicle body, several rollers rotatably connected to the vehicle body, a grooved slider fixed to the vehicle body, and a brake bolt threaded onto the grooved slider. The vehicle body and the inner template structure are fixedly connected. The length of the limiting plate is the same as the length of the track and is arranged parallel to the track. The grooved slider has an inverted concave structure. When the mobile vehicle is placed on the steel beam track, the grooved slider is inverted and hooked onto the limiting plate, and slides on the limiting plate. The brake bolt is threaded onto one side of the inverted concave structure. The brake bolt is set perpendicular to the limiting plate, and a brake pad is provided at the end of the brake bolt. When the brake bolt is tightened, the brake pad and the other side of the inverted concave structure of the grooved slider are clamped to both sides of the limiting plate, thereby stopping the mobile vehicle.

10. A construction method for shear walls on both sides of narrow expansion joints, characterized in that: The method employs the formwork device for constructing shear walls on both sides of narrow expansion joints as described in any one of claims 1-9; the method includes... Determine the number of standard templates and assemble the inner template structure; The inner formwork structure, the moving vehicle, and the track steel beams are assembled into an integral inner formwork structure and hoisted to the expansion joint. The track steel beams are supported on the external floor slab support system on both sides of the expansion joint. The spacing between the left and right inner templates is adjusted by the top support assembly according to the spacing of the expansion joints. The outer formwork structure is assembled, and the inner and outer formwork structures are fixedly connected by tie bolt assemblies to form the main formwork body. The concrete for the shear wall is poured; after the concrete has set, the tie rod assembly is disassembled from the outer formwork structure side; then the inner formwork structure is hoisted.

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