A method for constructing an inner form during a continuous beam pouring process

Abstract

The application discloses a construction method of an inner mold in a continuous beam pouring process, and comprises the following steps: S1. shortening the height of an inner mold support gantry, so that the inner mold support gantry is in a state of suspending an inner mold suspension piece; in the state, the inner mold support gantry is pushed forward, the front part of the inner mold support gantry is erected on a steel reinforcement cage, and the rear part is arranged at the bottom of a poured continuous beam hole; the inner mold support gantry is adjusted to a proper height, so that an inner mold walking mechanism can abut against the inner mold support truss; S2. the inner mold walking mechanism drives the inner mold to move forward and walk to a designed position in the hole of the steel reinforcement cage and above the front part of the inner mold support gantry; the inner mold is fixed with an outer mold through a pull rod. After the inner mold is installed, concrete can be poured. Through the front and rear sliding cooperation of the inner mold, the inner mold walking mechanism and the inner mold support gantry, the problem that the walking beam influences the lowering and positioning of the steel reinforcement cage is solved.

Description

Technical Field

[0001] This invention relates to the field of continuous beam casting construction technology, and in particular to a method for constructing internal formwork during the continuous beam casting process. Background Technology

[0002] Prestressed concrete continuous beams, due to the unloading effect of negative bending moments at the supports, significantly reduce the positive bending moment at mid-span, resulting in a smaller bending moment area and increased span capacity. Therefore, they are widely used in bridge and high-speed rail construction. In current cantilever continuous beam construction, the construction of the reinforcing cage is an essential and crucial step. This step involves on-site assembly after the continuous beam formwork is assembled. This assembly process is time-consuming, and because it often relies on the experience of the workers, coupled with the relatively confined workspace and limited tools, the quality of the reinforcing cage work is often poor, further affecting the overall quality of the continuous beam. To overcome these shortcomings, the applicant has developed a construction scheme: the reinforcing cage is prefabricated in a factory, on the ground at the construction site, or on a pre-cast continuous beam segment. It is then hoisted onto the pre-assembled bottom formwork at the end face of the continuous beam, between the outer formwork and the inner formwork. This significantly improves construction efficiency. Existing internal formwork for continuous beam casting construction typically employs a suspended design, such as the adjustable, swingable, and sliding integrated hanging basket internal formwork system disclosed in Chinese invention patent CN206815196U. This system uses a traveling beam fixed to the top of the continuous beam's inner cavity, allowing the internal formwork to move back and forth along the beam. However, when using precast steel cage hoisting and splicing, the traditional internal formwork system's traveling beams and other facilities hinder the lowering, positioning, and fixing of the steel cage, as it needs to be lowered from the top of the continuous beam to the end face. Therefore, how to achieve internal formwork movement without a traveling beam design has become a pressing problem to be solved. Summary of the Invention

[0003] This invention discloses a method for constructing the inner formwork during the continuous beam casting process. By coordinating the front and rear sliding of the inner formwork, the inner formwork traveling mechanism, and the inner formwork support gantry, the problem of the traveling beam affecting the lowering and positioning of the reinforcing cage is solved.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows:

[0005] A method for constructing an inner formwork during the casting of a continuous beam, wherein the inner formwork includes an inner formwork top plate, inner formwork side plates, and inner formwork support trusses. The inner formwork top plate is provided with inner formwork side plates on both sides, and inner formwork support trusses are provided at intervals below it. The inner formwork support mechanism is provided inside the inner formwork.

[0006] The inner mold support mechanism includes an inner mold traveling mechanism and an inner mold support gantry; the inner mold traveling mechanism is fixedly installed below the inner mold support gantry, the inner mold support gantry is height-adjustable and has a template traveling guide rail on top for the inner mold traveling mechanism to move the inner mold, the bottom of the inner mold traveling mechanism is provided with an inner mold suspension component, the inner mold support gantry is provided with a support gantry sliding track, and the inner mold suspension component can slide in the support gantry sliding track;

[0007] The internal formwork construction method includes the following steps: S1. Shorten the height of the internal formwork support gantry, so that the internal formwork support gantry is in a state where the internal formwork suspension components are suspended. In the suspended state, push the internal formwork support gantry forward so that the front part of the internal formwork support gantry is placed on the reinforcing cage, and the rear part is placed at the bottom of the already poured continuous beam duct. Adjust the internal formwork support gantry to a suitable height so that the internal formwork traveling mechanism can abut against the internal formwork support truss; S2. The internal formwork traveling mechanism drives the internal formwork forward, moving it to the designed position in the duct of the reinforcing cage, and it is located above the front part of the internal formwork support gantry. The internal formwork is fixed to the outer formwork by tie rods. After the internal formwork is installed, concrete can be poured.

[0008] Furthermore, the inner mold top plate and the inner mold side plate are movably connected, and an inner mold transverse telescopic rod is fixedly installed inside the support truss. The width of the inner mold support truss and the inner mold top plate can be adjusted by the inner mold transverse telescopic rod to adjust the width of the inner mold.

[0009] In step S2, before the inner mold moves forward, the width of the inner mold top plate and the inner mold support truss is adjusted by the inner mold lateral telescopic rod to match the width of the hole in the next continuous beam casting segment.

[0010] Furthermore, the inner mold support mechanism also includes an upper chamfer telescopic component and a lower chamfer telescopic component. The fixed end of the upper chamfer telescopic component is connected to the inner mold support truss, and the telescopic end is connected to the upper part of the inner mold side plate. The fixed end of the lower chamfer telescopic component is connected to the inner mold support truss, and the telescopic end is connected to the lower part of the inner mold side plate.

[0011] In step S2, before the inner mold moves forward, the upper chamfer telescopic component and the lower chamfer telescopic component are retracted.

[0012] After moving to the designed position in the duct of the steel cage, the upper and lower chamfered expansion joints extend, allowing the inner formwork side plate to reach its designed position.

[0013] Furthermore, the inner mold traveling mechanism includes an inner mold traveling wheel unit, an inner mold traveling base frame, an inner mold support jack, and an inner mold suspension component. The inner mold traveling base frame is fixedly installed below the inner mold support truss, and the inner mold traveling wheel unit and the inner mold support jack are installed below it. The inner mold traveling wheel unit is used to drive the inner mold traveling base frame to move on the inner mold support gantry. The fixed end of the inner mold support jack is connected to the inner mold traveling base frame. The inner mold traveling base frame and / or the inner mold support jack and / or the inner mold suspension component are provided.

[0014] When pouring concrete, the piston of the inner mold support jack extends downward to press against the inner mold support frame.

[0015] Furthermore, the inner mold support frame includes an inner mold support column and an inner mold column adjusting screw connected by a transverse connecting structure. The lower end of the inner mold support column is connected to the inner mold column adjusting screw, and the height of the inner mold column adjusting screw is adjustable.

[0016] Furthermore, a template travel guide rail is fixedly installed on the upper part of the inner mold support frame. There are two template travel guide rails, which are arranged parallel to each other.

[0017] The inner mold traveling wheel unit can move along the template traveling guide rail;

[0018] A transverse support rod for the side plate is also provided between the lower parts of the inner mold side plate.

[0019] Furthermore, the inner mold traveling wheel unit includes an inner mold traveling trolley with a drive device and an inner mold traveling wheel set with a rolling function, and at least one inner mold traveling trolley and one inner mold traveling wheel set are matched and arranged on each template traveling guide rail.

[0020] Furthermore, the inner mold traveling trolley includes a traveling drive motor, a gearbox, a drive wheel, a driven wheel, and a trolley base frame. The traveling drive motor is mounted on the trolley base frame and drives the drive wheel to rotate through the gearbox. The drive wheel drives the driven wheel to rotate through a transmission component. The drive wheel and the driven wheel are located inside the trolley base frame and are connected to the trolley base frame through bearings. The trolley base frame is also provided with a trolley base frame fork lug. The inner mold traveling base frame is provided with a first traveling base frame fork lug, and the trolley base frame fork lug is connected to the first traveling base frame fork lug through a pin shaft.

[0021] The inner mold traveling wheel set includes a wheel set base frame and a traveling wheel. The traveling wheel is rotatably disposed in the wheel set base frame. The wheel set base frame is also provided with a wheel set base frame fork lug. The inner mold traveling base frame is provided with a second traveling base frame fork lug. The wheel set base frame fork lug and the second traveling base frame fork lug are connected by a pin.

[0022] Furthermore, a support clamp can be provided on the outer side of the trolley base frame. The upper end of the support clamp is connected to the trolley base frame, and the lower end extends to the outer side of the template travel guide rail. It has an inwardly protruding locking post. The template travel guide rail has a groove running through it longitudinally. The locking post can slide up and down and left and right in the groove on the outer side of the template travel guide rail.

[0023] Furthermore, the reinforcing cage is erected on top of the bottom formwork and at the designed position between the outer formwork, and the bottom formwork, outer formwork, and reinforcing cage are supported by a cantilever casting machine.

[0024] The cantilever casting machine includes a support frame system, a walking system, a suspension mechanism, and a bottom load-bearing mechanism. The walking system is located below the support frame system and can move on the cast continuous beam segments. The suspension mechanism is located at the front end of the support frame system, and the bottom load-bearing mechanism is connected to the lower end of the suspension mechanism to support the formwork device, the reinforcing cage, and the cast continuous beam segments. The formwork device includes a bottom formwork, an outer formwork, and an inner formwork.

[0025] The present invention has the following advantages:

[0026] (1) The present invention achieves the forward movement of the inner mold by means of the forward and backward sliding cooperation of the inner mold, the inner mold traveling mechanism and the inner mold support gantry. When the inner mold moves forward to the design position of the continuous beam segment to be poured, the inner mold and the inner mold traveling mechanism are located in front of the inner mold support gantry. The inner mold support gantry will not extend beyond the continuous beam segment to be poured, thus solving the problem of the traveling beam interfering with the lowering and positioning of the precast steel cage.

[0027] (2) During the construction process, the inner formwork can be moved forward as a whole through the cooperation of the inner formwork traveling mechanism and the inner formwork support gantry. This also changes the problem of discontinuous operation and low efficiency of the traditional traveling beam and lifting ring cooperation to move the inner formwork forward, effectively improving construction efficiency and shortening construction time.

[0028] (3) The present invention further provides an upper chamfer telescopic component and a lower chamfer telescopic component. By controlling the extension and retraction of the upper chamfer telescopic component and the lower chamfer telescopic component, the automatic retraction and extension of the inner mold side plate are realized, thereby improving the automation level of inner mold disassembly and installation.

[0029] (4) The present invention further provides a transverse telescopic rod, and the inner mold support truss and the inner mold top plate can be set as an interlocking telescopic structure, which is similar to the prior art. The width of the inner mold template can be adjusted by the transverse telescopic rod, which improves the efficiency of inner mold adjustment. Attached Figure Description

[0030] Figure 1 This is a structural diagram of one implementation state of the internal mold.

[0031] Figure 2 yes Figure 1 A schematic diagram of the AA section structure.

[0032] Figure 3 This is a structural schematic diagram of another implementation state of the internal mold.

[0033] Figure 4 yes Figure 3 A schematic diagram of the BB cross-section structure.

[0034] Figure 5 This is a structural schematic diagram of the inner mold suspension component.

[0035] Figure 6 This is a structural schematic diagram of the internal mold traveling trolley.

[0036] Figure 7 yes Figure 6 A top-view structural diagram.

[0037] Figure 8 This is a structural schematic diagram of the inner mold walking wheel assembly.

[0038] Figure 9 This is a structural schematic diagram of an example of an internal mold application.

[0039] In the diagram, 1 is a continuous beam, 2 is an inner mold traveling mechanism, 201 is an inner mold traveling trolley, 201a is a gearbox, 201b is a drive motor, 201c is a support clamp, 201d is a drive wheel, 201e is a trolley base frame fork, 201f is a driven wheel, 201g is a trolley base frame, 202 is an inner mold support jack, 203 is an inner mold traveling base frame, 203a is a first traveling base frame fork, 203b is a second traveling base frame fork, 204 is an inner mold traveling wheel set, 204a is a wheel set base frame fork, 204b is a wheel set base frame, and 20 is a traveling wheel. 4c, Inner formwork suspension component 205, Inner formwork top plate 3, Inner formwork support truss 4, Inner formwork support gantry 5, Inner formwork support longitudinal beam 501, Inner formwork column adjusting screw 502, Inner formwork support column 503, Inner formwork support crossbeam 504, Side plate transverse strut 505, Upper chamfered telescopic component 6, Inner formwork transverse telescopic rod 7, Lower chamfered telescopic component 8, Tie rod 9, Inner formwork side plate 10, Walking system 11, Support frame system 12, Front sling 13, Rebar cage 14, Rear sling 15, Lower rear crossbeam 16, Lower front crossbeam 17. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0041] In the description of this invention, it should be noted that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. They are only used to facilitate the description of this invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] A method for constructing internal formwork during the casting of continuous beams, combined with Figure 1-4 As shown, the inner mold includes an inner mold top plate 3, inner mold side plates 10, and inner mold support trusses 4. The inner mold side plates 10 are provided on both sides of the inner mold top plate 3, and the inner mold support trusses 4 are provided at intervals below. This is the prior art. The shape and size of the inner mold top plate 3 and the inner mold side plates 10 match the duct in the middle of the continuous beam 1 casting segment.

[0044] An inner mold support mechanism is provided inside the inner mold; the inner mold support mechanism includes an inner mold traveling mechanism 2 and an inner mold support gantry 5; the inner mold traveling mechanism 2 is fixedly installed below the inner mold support truss 4, used to drive the inner mold to move and provide support during concrete pouring; the height of the inner mold support gantry 5 is adjustable, and it has a template traveling guide rail on top for the inner mold traveling mechanism 2 to move the inner mold; the height of the inner mold support gantry 5 is adjusted according to the height of the middle duct of the continuous beam 1 to adapt to the inner mold support requirements of different segments; an inner mold suspension component 205 is provided at the bottom of the inner mold traveling mechanism 2, and a support gantry sliding track is provided on the side of the inner mold support gantry 5; the inner mold suspension component 205 can slide in the support gantry sliding track.

[0045] The internal formwork construction method includes the following steps: S1. Shorten the height of the internal formwork support gantry 5 so that the internal formwork support gantry 5 is in a state where the internal formwork suspension component 205 is suspended. In the suspended state, push the internal formwork support gantry 5 forward so that the front part of the internal formwork support gantry 5 is supported on the reinforcing cage 14 and the rear part is set at the bottom of the already poured continuous beam 1 duct. Adjust the internal formwork support gantry 5 to a suitable height so that the internal formwork traveling mechanism 2 can abut against the internal formwork support truss 4, i.e. Figure 1 and 2The state shown is as follows: S2. The inner mold traveling mechanism 2 moves the inner mold forward, traveling to the designed position in the channel of the reinforcing cage 14, and is located above the front part of the inner mold support frame 5. The inner mold is fixed to the outer mold by the tie rod 9. After the inner mold is installed, concrete can be poured.

[0046] Furthermore, the inner mold top plate 3 and the inner mold side plate 10 are movably connected, such as by hinges, which facilitates adjustment of the overall size of the inner mold and also facilitates installation and dismantling; the inner mold support truss 4 is fixedly provided with an inner mold transverse telescopic rod 7, which can adjust the width of the inner mold support truss 4 and the inner mold top plate 3. The inner mold support truss 4 is an interlocking telescopic structure, similar to the prior art. It can adjust the width of the inner mold by means of the inner mold transverse telescopic rod 7.

[0047] In step S2, before the inner mold moves forward, the width of the inner mold top plate 3 and the inner mold support truss 4 is adjusted by the inner mold lateral telescopic rod 7 to match the width of the hole in the next continuous beam 1 casting segment.

[0048] Furthermore, the inner mold support mechanism also includes an upper chamfered telescopic component 6 and a lower chamfered telescopic component 8. The fixed end of the upper chamfered telescopic component 6 is connected to the inner mold support truss 4, and the telescopic end is connected to the upper part of the inner mold side plate 10. The fixed end of the lower chamfered telescopic component 8 is connected to the inner mold support truss 4, and the telescopic end is connected to the lower part of the inner mold side plate 10. The upper chamfered telescopic component 6 and the lower chamfered telescopic component 8 are used to realize the rapid demolding and demolding of the inner mold side plate 10, and to provide strong support for the inner mold during concrete pouring to prevent deformation of the inner mold side plate 10.

[0049] In step S2, before the inner mold moves forward, the upper chamfer telescopic component 6 and the lower chamfer telescopic component 8 are contracted. Generally, the upper chamfer telescopic component 6 and the lower chamfer telescopic component 8 are contracted first, and then the width of the inner mold is adjusted.

[0050] When the inner formwork side plate 10 reaches the designed position in the channel of the steel cage 14, the upper chamfered expansion member 6 and the lower chamfered expansion member 8 extend, so that the inner formwork side plate 10 reaches its designed position and provides support for the inner formwork side plate 10.

[0051] By controlling the upper chamfering telescopic component 6 and the lower chamfering telescopic component 8, the extension and retraction of the inner mold side plate 10 can be changed to achieve the purpose of automatic mold installation and demolding. In order to facilitate automatic control, the upper chamfering telescopic component 6 and the lower chamfering telescopic component 8 can be hydraulic jacks or electric struts. In this embodiment, electric struts are preferred.

[0052] As a more preferred embodiment, this embodiment further provides a specific structure of the inner mold traveling mechanism 2. The inner mold traveling mechanism 2 includes an inner mold traveling wheel unit, an inner mold traveling base frame 203, an inner mold support jack 202, and an inner mold suspension component 205. The inner mold traveling base frame 203 is fixedly installed below the inner mold support truss 4, and the inner mold traveling wheel unit and the inner mold support jack 202 are installed below it. The inner mold traveling wheel unit is used to drive the inner mold traveling base frame 203 to move on the inner mold support gantry 5. The fixed end of the inner mold support jack 202 is connected to the inner mold traveling base frame 203. The inner mold traveling base frame 203 and / or the inner mold support jack 202 and / or the inner mold suspension component 205 are provided. The inner mold traveling mechanism 2 has an inner mold suspension component 205 at its bottom, and a support gantry sliding track is provided on the side of the inner mold support gantry 5. The inner mold suspension component 205 can slide in the support gantry sliding track. When it is necessary to move the inner mold support gantry 5 forward, the inner mold support gantry 5 can be in a state suspended by the inner mold suspension component 205, and the gantry support gantry can be pushed or driven forward. In this embodiment, combined with Figure 5 As shown, the inner mold suspension component 205 is set on both sides of the inner mold support jack 202, and uses suspension wheels to reduce friction with the top surface of the support gantry sliding track.

[0053] When pouring concrete, the piston of the inner formwork support jack 202 extends downwards and abuts against the inner formwork support gantry 5, so that the inner formwork is raised to be flush with the top of the inner ring of the already poured continuous beam 1, allowing concrete pouring to proceed. This reduces the load-bearing pressure on the inner formwork traveling mechanism 2 and extends its service life.

[0054] Furthermore, the inner mold support gantry 5 includes an inner mold support column 503 and an inner mold column adjusting screw 502 connected by a transverse connecting structure. The lower end of the inner mold support column 503 is connected to the inner mold column adjusting screw 502, and the height of the inner mold column adjusting screw 502 is adjustable. Regarding the transverse connecting structure, combined with... Figure 1-4 As shown, this embodiment uses an inner mold support longitudinal beam 501 and an inner mold support cross beam 504. The inner mold support longitudinal beam 501, inner mold support column 503, and inner mold support cross beam 504 are connected to form a cubic support. Figure 1 and 3 The diagram shows four longitudinal beams 501 supporting the inner mold. Figure 2As shown, there are two beams on each side. The vertical direction of the inner mold support beam 504 is connected by the inner mold support column 503, and the horizontal direction is also connected by the inner mold support beam 504. The number of inner mold support longitudinal beams 501, inner mold support columns 503, and inner mold support beams 504 can be adjusted according to the actual load-bearing requirements. The inner mold support column 503 is made of steel pipe, and column connecting plates are welded to both ends to extend the length of the inner mold support column 503 or facilitate connection with the inner mold support longitudinal beams 501 and inner mold support beams 504. An inner mold support column adjusting screw 502 is fixedly installed at the bottom of the inner mold support column 503. Specifically, the height of the inner mold support gantry 5 can be adjusted by adjusting the height of the inner mold support column adjusting screw 502. Of course, if the height adjustment is large, bolt fixing can also be used to facilitate disassembly and replacement of the inner mold support column 503 of appropriate length. The bottom of the inner mold support column 503 is also fixed with bolts to the inner mold column adjusting screw 502. The inner mold column adjusting screw 502 can also adjust the levelness of the entire inner mold support mechanism. Adjusting the height with the adjusting screw is existing technology; any existing height-adjusting screw can be used. This embodiment also provides a preferred structure: the inner mold column adjusting screw 502 includes a screw, a positive thread nut, a negative thread nut, a first support rod steel pipe, a second support steel pipe, and a connecting plate. A positive thread nut is provided at one end of the first support rod steel pipe, and a connecting plate is fixedly provided at the other end. A negative thread nut is provided at one end of the second support steel pipe, and the other end of the second support steel pipe is fixedly connected to the bottom end of the inner mold support column 503. One end of the screw is threadedly connected to the positive thread nut, and the other end of the screw is threadedly connected to the negative thread nut. By rotating the screw, the gap between the first support rod steel pipe and the second support steel pipe can be adjusted, thereby adjusting the height of the inner mold support mechanism. This design is easy to manufacture, simple to adjust, and can quickly adapt to support surfaces with different inclinations. A transverse support rod 505 is provided between the lower parts of the inner mold side plate 10. The transverse support rod 505 is detachable and is used when pouring concrete. It forms a triangular support with the lower chamfered expansion member 8 to the inner mold side plate to ensure the stability of the support.

[0055] Furthermore, a template travel guide rail is fixedly installed on the upper part of the inner mold support gantry 5. There are two template travel guide rails, which are arranged parallel to each other. The inner mold travel wheel unit can match and move along the template travel guide rail, thereby driving the inner mold to move forward.

[0056] Furthermore, this embodiment also provides a specific inner mold traveling wheel unit structure. The inner mold traveling wheel unit includes an inner mold traveling trolley with a drive device and an inner mold traveling wheel set 204 with a rolling function. At least one inner mold traveling trolley and one inner mold traveling wheel set 204 are matched and arranged on each template traveling guide rail. The inner mold traveling trolley can be arranged under the rear of the inner mold traveling base 203, and the inner mold traveling wheel set 204 can be arranged under the front of the inner mold traveling base 203. The inner mold traveling trolley provides the power for traveling.

[0057] Furthermore, such as Figure 6 and 7 As shown, the inner mold traveling trolley includes a traveling drive motor 201b, a gearbox 201a, a drive wheel 201d, a driven wheel 201f, and a trolley base frame 201g. The traveling drive motor 201b is mounted on the trolley base frame 201g and drives the drive wheel 201d to rotate via the gearbox 201a. The drive wheel 201d drives the driven wheel 201f to rotate via a transmission component. The drive wheel 201d and the driven wheel 201f are located inside the trolley base frame 201g and connected to the trolley base frame 201g via bearings. A trolley base frame fork lug 201e is also provided on the top of the trolley base frame 201g. The inner mold traveling base frame 203 is provided with a first traveling base frame fork lug 203a, and the trolley base frame fork lug 201e is connected to the first traveling base frame fork lug 203a via a pin. The gearbox 201a... The driving of the drive wheel 201d and the drive wheel 201f can both be achieved through a transmission component, which can be a belt or a sprocket. This embodiment provides a more specific structure where the drive wheel 201d and the driven wheel 201f have the same structure. A sprocket is fixedly mounted on the side of the drive wheel 201d and the driven wheel 201f. A drive sprocket is fixedly mounted on the output shaft of the gearbox 201a. This drive sprocket is connected to the drive wheel 201d via a chain, and the drive wheel 201d is in turn connected to the driven wheel 201f via a chain. The inner mold traveling frame 203 and the trolley frame fork lug 201e are connected by a pin shaft because the inner mold support gantry 5 and the inner mold traveling mechanism will exhibit certain angle changes when they are in different positions. The pin shaft connection can adaptively adjust the connection angle between the inner mold traveling frame 203 and the inner mold traveling trolley 201.

[0058] The inner mold traveling wheel assembly 204 includes a wheel assembly base frame 204b and traveling wheels 204c. The traveling wheels 204c are rotatably mounted within the wheel assembly base frame 204b. A wheel assembly base frame 204b fork lug 204a is also provided on the top of the wheel assembly base frame 204b. The inner mold traveling base frame 203 is provided with a second traveling base frame fork lug 203b. The wheel assembly base frame 204b fork lug 204a and the second traveling base frame fork lug 203b are connected by a pin. To improve traveling stability, such as... Figure 8As shown, there are two traveling wheels 204c, which are connected to the wheel set base frame 204b via bearings. The wheel set base frame 204b is connected to the inner mold traveling base frame 203 by a pin, which is also to allow for adaptive adjustment of the connection angle between the inner mold traveling base frame 203 and the inner mold traveling wheel set 204.

[0059] Furthermore, combining Figure 6 As shown ( Figure 7 (Not shown in the image) A support clamp 201c can be installed on the outer side of the trolley base frame. The upper end of the support clamp 201c is connected to the trolley base frame, and the lower end extends to the outer side of the template traveling guide rail. It has an inwardly protruding locking post. The template traveling guide rail has a groove running through it longitudinally. The locking post can slide up and down and left and right in the groove on the outer side of the template traveling guide rail. In this embodiment, the template traveling guide rail is generally made of I-beam. The groove of the I-beam can be used to insert the locking post. At the same time, the groove can also be used to insert the suspension component to realize the suspension of the inner formwork support gantry 5. The purpose of setting the support clamp 201c is that when pouring concrete for the continuous beam 1 segment, the inner formwork support truss 4 will bear a large pressure, which will cause it to press down and cause the inner formwork traveling wheel unit to tilt outward. To solve this problem, this embodiment sets the support clamp 201c. The support clamp 201c holds the template traveling guide rail, which can reduce the damage caused by the tilting of the inner formwork traveling wheel unit.

[0060] Furthermore, in combination Figure 9 As shown, the following describes the overall construction structure of the aforementioned inner formwork support mechanism and precast steel cage 14: The steel cage 14 is erected on top of the bottom formwork and at the designed position between the outer formwork. The bottom formwork, outer formwork, and steel cage 14 are supported by a cantilever casting machine. The cantilever casting machine includes a support frame system 12, a walking system 11, a suspension mechanism, and a bottom load-bearing mechanism. The walking system 11 is installed under the support frame system 12 and can travel on the already cast continuous beam segment 1. The front end of the support frame system 12 is equipped with a suspension mechanism, which includes a front sling 13 located on the upper front side of the support frame system 12 and a rear sling 15 located on the lower front side of the support frame system 12. The lower end of the suspension mechanism is connected to a bottom load-bearing mechanism for supporting the formwork device, the reinforcing cage 14, and the continuous beam segment 1 being poured. The bottom load-bearing mechanism illustrated in this embodiment includes a lower front crossbeam 17 and a lower rear crossbeam 16, which are connected to the front sling 13 and the rear sling 15, respectively. The formwork device includes a bottom formwork, an outer formwork, and an inner formwork. The outer formwork and the bottom formwork arrive at the construction front end along with the cantilever casting machine. After the reinforcing cage 14 is hoisted to the design position, the inner formwork support gantry 5 moves forward, and the front part of the inner formwork support gantry 5 is supported by the bottom load-bearing mechanism. After the inner formwork and the inner formwork traveling mechanism move forward to the design position, the inner formwork and the inner formwork traveling mechanism are also supported by the bottom load-bearing mechanism.

[0061] Based on the structure disclosed in this embodiment, the construction method of the inner mold is described in more detail below: When pouring concrete, the piston of the inner mold support jack 202 extends downward and abuts against the inner mold support gantry 5, thereby reducing the working load of the inner mold traveling wheel unit. The upper chamfered telescopic component 6, the lower chamfered telescopic component 8 and the side plate transverse support rod 505, together with the tie rod 9 of the outer mold, keep them in the design position without deformation. After the inner mold is poured, the bottom load-bearing mechanism is lowered a distance as a whole, including all the templates of the inner mold, which are separated from the poured concrete structure. The specific process of moving and installing the inner formwork to the next continuous beam segment 1 is as follows: The integrated machine travels to its position, and the outer formwork is installed. After the reinforcing cage 14 is installed between the outer formwork segments, the upper chamfering telescopic component 6, the lower chamfering telescopic component 8, and the inner formwork support jack 202 are contracted. The side plate transverse support rod 505 is removed. Then, the height of the inner formwork support gantry 5 is shortened, so that the inner formwork support gantry 5 is in a state where the inner formwork suspension component 205 is suspended. In this suspended state, the inner formwork support gantry 5 is pushed forward, so that the front part of the inner formwork support gantry 5 is placed on the reinforcing cage 14, and the rear part is set at the bottom of the already poured continuous beam 1 duct. The inner formwork support gantry 5 is adjusted to a suitable height so that the inner formwork traveling mechanism 2 can support the inner formwork support truss 4, and the inner formwork traveling wheel unit can adhere to the formwork traveling guide rail. Figure 1 and Figure 2 The image shows the inner mold support gantry 5 in its forward-moved position. It should be noted that... Figure 2 In this state, the side plate transverse support rod 505 has been removed. The diagram is only for illustration of the installation position of the side plate transverse support rod 505 during concrete pouring. Adjust the width of the inner mold top plate 3 and the inner mold support truss 4, start the inner mold traveling trolley 201, drive the entire inner mold traveling mechanism 2 to move, and then drive the entire inner mold forward to the design position. The inner mold traveling mechanism 2 can be located above the front of the inner mold support gantry 5. The upper chamfer telescopic component 6 and the lower chamfer telescopic component 8 extend. The inner mold is fixed to the outer mold by the tie rod 9. The piston of the inner mold support jack 202 extends downward and abuts against the inner mold support gantry 5. Figure 3 and Figure 4 The image shows the inner mold in its forward-moved position. The side plate transverse struts 505 are then installed to support the inner mold, thus completing the installation of the inner mold and allowing for the pouring of the first segment of the continuous beam.

[0062] In this embodiment, the aforementioned jacks, telescopic components, and motors are uniformly controlled by a controller, enabling automatic movement of the inner mold, automatic extension of the template, and fixing or dismantling operations. Program control reduces manual intervention and further enhances its level of automation.

Claims

1. A method for constructing internal formwork during the casting of a continuous beam, characterized in that: The inner mold includes an inner mold top plate, inner mold side plates, and inner mold support trusses. The inner mold top plate is provided with inner mold side plates on both sides, and the inner mold support trusses are provided at intervals below. The inner mold support mechanism is provided inside the inner mold. The inner mold support mechanism includes an inner mold traveling mechanism and an inner mold support gantry; the inner mold traveling mechanism is fixedly installed below the inner mold support gantry, the inner mold support gantry is height-adjustable and has a template traveling guide rail on top for the inner mold traveling mechanism to move the inner mold, the bottom of the inner mold traveling mechanism is provided with an inner mold suspension component, the inner mold support gantry is provided with a support gantry sliding track, and the inner mold suspension component can slide in the support gantry sliding track; The internal formwork construction method includes the following steps: S1. Shorten the height of the internal formwork support gantry so that the internal formwork support gantry is in a state where the internal formwork suspension components are suspended. In the suspended state, push the internal formwork support gantry forward so that the front part of the internal formwork support gantry is placed on the reinforcing cage and the rear part is placed at the bottom of the already poured continuous beam duct. Adjust the internal formwork support gantry to a suitable height so that the internal formwork traveling mechanism can resist the internal formwork support truss; S2. The internal formwork traveling mechanism drives the internal formwork forward to the designed position in the duct of the reinforcing cage, and is located above the front part of the internal formwork support gantry. The internal formwork is fixed to the outer formwork by tie rods. The inner mold traveling mechanism includes an inner mold traveling wheel unit, an inner mold traveling base frame, an inner mold support jack, and an inner mold suspension component. The inner mold traveling base frame is fixedly installed below the inner mold support truss, and the inner mold traveling wheel unit and the inner mold support jack are installed below it. The inner mold traveling wheel unit is used to drive the inner mold traveling base frame to move on the inner mold support gantry. The fixed end of the inner mold support jack is connected to the inner mold traveling base frame. The inner mold traveling base frame and / or the inner mold support jack and / or the inner mold suspension component are provided. When pouring concrete, the piston of the inner mold support jack extends downward to press against the inner mold support frame.

2. The internal formwork construction method according to claim 1, characterized in that: The inner mold top plate and the inner mold side plate are movably connected. The inner mold transverse telescopic rod is fixedly installed inside the support truss. The width of the inner mold support truss and the inner mold top plate can be adjusted by the inner mold transverse telescopic rod to adjust the width of the inner mold. In step S2, before the inner mold moves forward, the width of the inner mold top plate and the inner mold support truss is adjusted by the inner mold lateral telescopic rod to match the width of the hole in the next continuous beam casting segment.

3. The method for constructing an internal formwork according to claim 1, characterized in that: The inner mold support mechanism also includes an upper chamfer telescopic component and a lower chamfer telescopic component. The fixed end of the upper chamfer telescopic component is connected to the inner mold support truss, and the telescopic end is connected to the upper part of the inner mold side plate. The fixed end of the lower chamfer telescopic component is connected to the inner mold support truss, and the telescopic end is connected to the lower part of the inner mold side plate. In step S2, before the inner mold moves forward, the upper chamfer telescopic component and the lower chamfer telescopic component are retracted. After moving to the designed position in the duct of the steel cage, the upper and lower chamfered expansion joints extend, allowing the inner formwork side plate to reach its designed position.

4. The method for constructing an internal formwork according to any one of claims 1 to 3, characterized in that: The inner mold support frame includes an inner mold support column and an inner mold column adjusting screw connected by a transverse connecting structure. The lower end of the inner mold support column is connected to the inner mold column adjusting screw, and the height of the inner mold column adjusting screw is adjustable.

5. The method for constructing an internal formwork according to claim 1, characterized in that: The inner mold support frame is fixedly provided with a template travel guide rail. There are two template travel guide rails, which are arranged parallel to each other. The inner mold traveling wheel unit can move along the template traveling guide rail; A transverse support rod for the side plate is also provided between the lower parts of the inner mold side plate.

6. The method for constructing an internal formwork according to claim 5, characterized in that: The inner mold traveling wheel unit includes an inner mold traveling trolley with a drive device and an inner mold traveling wheel set with a rolling function. Each template traveling guide rail is equipped with at least one inner mold traveling trolley and one inner mold traveling wheel set.

7. The method for constructing an internal formwork according to claim 6, characterized in that: The inner mold traveling trolley includes a traveling drive motor, a gearbox, a drive wheel, a driven wheel, and a trolley base frame. The traveling drive motor is mounted on the trolley base frame and drives the drive wheel to rotate through the gearbox. The drive wheel drives the driven wheel to rotate through a transmission component. The drive wheel and the driven wheel are located inside the trolley base frame and are connected to the trolley base frame through bearings. The trolley base frame is also provided with a trolley base frame fork lug. The inner mold traveling base frame is provided with a first traveling base frame fork lug, and the trolley base frame fork lug is connected to the first traveling base frame fork lug through a pin shaft. The inner mold traveling wheel set includes a wheel set base frame and a traveling wheel. The traveling wheel is rotatably disposed in the wheel set base frame. The wheel set base frame is also provided with a wheel set base frame fork lug. The inner mold traveling base frame is provided with a second traveling base frame fork lug. The wheel set base frame fork lug and the second traveling base frame fork lug are connected by a pin.

8. The method for constructing an internal formwork according to claim 7, characterized in that: A support clamp can be provided on the outer side of the trolley base frame. The upper end of the support clamp is connected to the trolley base frame, and the lower end extends to the outer side of the template travel guide rail. It has an inwardly protruding locking post. The template travel guide rail has a groove running through it longitudinally. The locking post can slide up and down and left and right in the groove on the outer side of the template travel guide rail.

9. The method for constructing an internal formwork according to claim 1, characterized in that: The steel cage is erected on the bottom formwork and at the designed position between the outer formwork. The bottom formwork, outer formwork and steel cage are supported by a cantilever casting machine. The cantilever casting machine includes a support frame system, a walking system, a suspension mechanism, and a bottom load-bearing mechanism. The walking system is located below the support frame system and can move on the cast continuous beam segments. The suspension mechanism is located at the front end of the support frame system, and the bottom load-bearing mechanism is connected to the lower end of the suspension mechanism to support the formwork device, the reinforcing cage, and the cast continuous beam segments. The formwork device includes a bottom formwork, an outer formwork, and an inner formwork.

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