Prefabricated box girder formwork structure

Abstract

The utility model relates to the technical field of box girder prefabrication, and provides a prefabricated box girder formwork structure which comprises two I-shaped supporting girders. The bottom die panel is arranged above the I-shaped supporting main beam; a plurality of channel steel stiffening frames are mounted below the bottom die panel; the distribution supporting beams are distributed below the channel steel stiffening frame at intervals, and the buffer layers are installed between the distribution supporting beams and the channel steel stiffening frame; the side die positioning blocks are arranged below the lower edges of the channel steel stiffening frames on the two sides of the bottom die panel, and the buffer layer is located between the two side die positioning blocks; the side die supports the main frame; the side mold panel is mounted on the side mold supporting main frame; the bottom die positioning strip is mounted below the arc panel at the bottom of the side die panel, and the upper edge of the bottom die positioning strip is clamped with the lower edge of the side die positioning block during die assembly; and the sponge grout stopping rods are embedded in the notches in the two sides of the bottom die panel. By means of the scheme, the side die and the bottom die are firmly connected, accurate in positioning, easy to install, tight in combination, free of slurry leakage and more compact in vibration.

Description

Technical Field

[0001] This utility model relates to the field of box girder prefabrication technology, and more specifically, to a prefabricated box girder template structure. Background Technology

[0002] In related technologies, vibration is achieved by inserting a vibrator into the web, while the bottom and middle of the beam are not vibrated. The vibration force of the vibrator forces the steel reinforcement to shift, inserting and pulling it out. The side formwork and bottom formwork are connected by a backing-and-tightening method using tie bolts. This technology has the following drawbacks:

[0003] (1) Problems such as jamming of the rod, slow construction speed, damage to the spacing of the reinforcing bars, failure to insert the rod to the bottom, and inability to achieve uniform vibration of the bottom slab concrete are likely to occur. During pouring, insufficient vibration or excessive vibration may occur.

[0004] (2) The side mold lacks accurate positioning design in the vertical direction. During operation, one worker needs to be inside the mold and another worker needs to be outside the mold to repeatedly adjust the height of the template so that the inner surface of the side mold arc is flush with the fixed bottom mold surface. This is time-consuming, laborious and not easy to level.

[0005] (3) Cracks are easily generated between the side formwork and the bottom formwork, resulting in a lack of cement grout in the concrete at the bottom of the beam, which affects the density and strength. Utility Model Content

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0007] Therefore, one objective of this utility model is to provide a precast box girder formwork structure with a firm connection between the side formwork and the bottom formwork, accurate positioning, simple installation, short construction time, easy operation, straight line, tight joint, no grout leakage, increased bottom formwork vibration, which can realize concrete diversion and more compact vibration.

[0008] To achieve the above objectives, the present invention provides a precast box girder formwork structure, comprising: two I-beam supporting main beams arranged along the length of the precast box girder; a bottom formwork panel disposed above the I-beam supporting main beams; multiple channel steel stiffening frames installed under the bottom formwork panel, the slots of the channel steel stiffening frames facing outwards; and multiple distribution support beams spaced apart below the channel steel stiffening frames, the distribution support beams connecting the bottom formwork panel, the channel steel stiffening frames, and the I-beam supporting main beams, with buffers installed between the distribution support beams and the channel steel stiffening frames. The system comprises: a side mold positioning block, located below the lower edge of the channel steel stiffening frame on both sides of the bottom mold panel; a buffer layer between two side mold positioning blocks; a side mold support main frame; a side mold panel, installed on the side mold support main frame; a bottom mold positioning strip, installed below the bottom arc panel of the side mold panel, with the bottom mold positioning strip corresponding to the side mold positioning block, and the upper edge of the bottom mold positioning strip locking with the lower edge of the side mold positioning block when the mold is closed; and a sponge anti-grouting rod, embedded in the groove of the channel steel stiffening frame on both sides of the bottom mold panel, and protruding a portion outward from the groove.

[0009] Preferably, multiple channel steel transition structures are installed between the I-beam support beam and the channel steel stiffening frame; multiple tie bolts are detachably installed in the channel steel transition structures to achieve the fastening and fixing of the bottom mold and the side mold when the mold is closed.

[0010] Preferably, the precast box girder formwork structure further includes: an upper positioning sleeve disposed below the bottom formwork panel; and a lower positioning sleeve embedded in the longitudinal centerline of the concrete platform foundation, so as to restrict the horizontal and vertical displacement of the bottom formwork panel through the cooperation of the upper and lower positioning sleeves.

[0011] Preferably, the precast box girder formwork structure further includes: a vibration motor mounting plate, disposed below the bottom formwork panel; and an attached vibrator, mounted on the vibration motor mounting plate.

[0012] Preferably, the bottom mold positioning strip is located 56mm below the bottom arc panel of the side mold panel, the bottom mold positioning strip is 6mm wide, and multiple reinforcing ribs are installed under the bottom mold positioning strip, the multiple reinforcing ribs connecting the bottom mold positioning strip and the side mold panel.

[0013] Preferably, the precast box girder formwork structure further includes: anchor bolts, installed below the legs of the side formwork support frame, to adjust the height of the side formwork panel.

[0014] Preferably, the steel structure portion of the bottom formwork panel is broken into standard sections every 6m.

[0015] Preferably, the buffer layer is a 10mm thick EVA foam buffer layer.

[0016] The precast box girder formwork structure proposed in this utility model has the following beneficial technical effects:

[0017] (1) The precast box girder template structure proposed in this utility model sets side mold positioning blocks along the lower edge of the channel steel stiffening frame on both sides of the bottom mold panel, and installs bottom mold positioning strips below the bottom arc panel of the side mold panel. When the mold is closed, the two can be locked together, which can accurately control the position of the side mold panel. The side mold assembly is simpler and faster, with strong operability, greatly saving assembly time, and ensuring that the inner 1 / 4 arc surface of the bottom of the beam is flush with the bottom mold surface, with a straight line, tight joint, and no grout leakage.

[0018] (2) The precast box girder template structure proposed in this utility model has sponge grout-stopping rods embedded in the grooves of the channel steel stiffening frame on both sides of the bottom formwork panel, and the sponge grout-stopping rods protrude outward from the grooves, thereby further ensuring the tightness of the joint between the side formwork and the bottom formwork and avoiding grout leakage.

[0019] (3) The precast box girder template structure proposed in this utility model has multiple channel steel transition structures installed between the I-shaped support main beam and the channel steel stiffening frame, which facilitates the installation of tie rods and uses tie rods to achieve the closing and fixing of the bottom mold and the side mold.

[0020] (4) The precast box girder formwork structure proposed in this utility model has a positioning sleeve pre-embedded on the longitudinal center line of the concrete platform foundation and a positioning sleeve installed below the bottom formwork panel. The corresponding insertion can limit the horizontal displacement of the bottom formwork and control the vertical displacement of the bottom formwork panel, further ensuring accurate position control and accurate mold closing.

[0021] (5) The precast box girder template structure proposed in this utility model is designed with a vibration motor hanging plate and an attached vibrator, which can realize the vibration of the bottom formwork, realize the diversion of concrete and make the vibration more compact. A 10mm thick EVA foam buffer layer is used between the distribution support beam and the channel steel stiffening frame. When the bottom formwork vibrates, it can play a shock-proof buffering role, ensuring the vibration effect during pouring. The bottom formwork and the side formwork vibrate at the same time, making the vibration more uniform.

[0022] (6) In the precast box girder template structure proposed in this utility model, the bottom formwork panel steel structure is broken into a standard section every 6m, which facilitates the maintenance of the bottom formwork.

[0023] (7) The precast box girder template structure proposed in this utility model can effectively improve the performance of precast box girder bottom concrete surface color difference, cracks, density, strength dispersion and other properties.

[0024] Additional aspects and advantages of this invention will be set forth in the description which follows, and in part will be obvious from the description or may be learned by practice of the invention. Attached Figure Description

[0025] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0026] Figure 1 A schematic diagram of a precast box girder template structure according to an embodiment of the present invention is shown.

[0027] Figure 2 It shows Figure 1 Enlarged schematic diagram of the middle section structure;

[0028] Figure 3 Another structural schematic diagram of a precast box girder template structure according to an embodiment of the present invention is shown;

[0029] Figure 4 A schematic diagram of the side formwork structure in a precast box girder template structure according to an embodiment of the present invention is shown;

[0030] Figure 5 It shows Figure 4 Side view of the middle mold structure;

[0031] Figure 6 It shows Figure 5 Enlarged schematic diagram of the middle section structure;

[0032] Figure 7 A schematic diagram of the bottom formwork cross-section structure in a precast box girder formwork structure according to an embodiment of the present invention is shown.

[0033] Figure 8 A top view of the bottom formwork portion of a precast box girder template structure according to an embodiment of the present invention is shown.

[0034] Figure 9 The diagram shows a front view of the bottom formwork portion of a precast box girder template structure according to an embodiment of the present invention.

[0035] Figure 10 A side view of the bottom formwork portion of a precast box girder formwork structure according to an embodiment of the present invention is shown.

[0036] in, Figures 1 to 10 The correspondence between the reference numerals and components in the attached drawings is as follows:

[0037] 102 I-beam support main beam, 104 bottom formwork panel, 106 channel steel stiffening frame, 108 distribution support beam, 110 buffer layer, 112 side formwork positioning block, 114 side formwork support main frame, 116 side formwork panel, 118 bottom formwork positioning strip, 120 sponge grout stop bar, 122 channel steel transition structure, 124 tie bolt, 126 upper positioning sleeve, 128 lower positioning sleeve, 130 vibration motor hanging plate, 132 attached vibrator, 134 reinforcing rib plate, 136 anchor bolt. Detailed Implementation

[0038] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0039] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0040] The following is combined Figures 1 to 10 A precast box girder template structure according to an embodiment of the present utility model will be described in detail.

[0041] like Figures 1 to 10As shown, a precast box girder formwork structure according to an embodiment of this utility model includes: an I-beam support main beam 102, a bottom formwork panel 104, a channel steel stiffening frame 106, a distribution support beam 108, a side formwork panel 116, a bottom formwork positioning strip 118, and a sponge grout-stopping rod 120, etc. Two I-beam support main beams 102 are arranged along the length of the precast box girder. The bottom formwork panel 104 is positioned above the I-beam support main beams, and multiple channel steel stiffening frames 106 are installed below the bottom formwork panel 104, with the slots of the channel steel stiffening frames 106 facing outwards. Multiple distribution support beams 108 are spaced apart below the channel steel stiffening frames 106, connecting the bottom formwork panel 104, the channel steel stiffening frames 106, and the I-beam support main beams 102. A buffer layer 110 is installed between the distribution support beams 108 and the channel steel stiffening frames 106. This allows the bottom formwork panel 104 system to be separated from the pedestal support system, facilitating the vibration of the bottom formwork panel 104. Side formwork positioning blocks 112 are installed below the lower edge of the channel steel stiffening frame 106 on both sides of the bottom formwork panel 104, with the buffer layer 110 positioned between the two side formwork positioning blocks 112. The side formwork panel 116 is installed on the side formwork support main frame 114. A bottom formwork positioning strip 118 is installed below the bottom arc panel of the side panel. The bottom formwork positioning strip 118 corresponds to the side formwork positioning block 112. During mold closing, the upper edge of the bottom formwork positioning strip 118 is locked to the lower edge of the side formwork positioning block 112, enabling precise control of the side formwork panel 116 position. This makes side formwork assembly simpler, faster, and more operable, significantly saving assembly time and ensuring that the inner 1 / 4 arc surface of the beam bottom is flush with the bottom formwork surface, with a straight line, tight connection, and no grout leakage. Sponge grout-stopping rods 120 are embedded in the grooves of the channel steel stiffening frames 106 on both sides of the bottom mold panel 104, and the sponge grout-stopping rods 120 protrude outward from the grooves, thereby further ensuring the tightness of the joint between the side mold and the bottom mold and avoiding grout leakage.

[0042] Furthermore, such as Figures 1 to 3 As shown, multiple channel steel transition structures 122 are installed between the I-shaped support main beam and the channel steel stiffening frame 106, and multiple tie bolts 124 are detachably installed in the channel steel transition structures 122, thereby facilitating the use of tie bolts to achieve mold closing and fixing of the bottom mold and the side mold.

[0043] Furthermore, such as Figure 3 As shown, an upper positioning sleeve 126 is set below the bottom formwork panel 104, and a lower positioning sleeve 128 is pre-embedded on the longitudinal center line of the concrete platform foundation. By inserting the upper positioning sleeve 126 into the lower positioning sleeve 128, the horizontal displacement of the bottom formwork can be restricted, and the vertical displacement of the bottom formwork panel 104 can be controlled, further ensuring precise position control and precise mold closing.

[0044] Furthermore, such as Figure 1 , Figure 2 and Figure 7 , Figure 8 As shown, the precast box girder formwork structure also includes: a vibration motor mounting plate 130, which is set below the bottom formwork panel 104; and an attached vibrator 132, which is installed on the vibration motor mounting plate 130. This enables bottom formwork vibration, allowing for concrete diversion and more compacted compaction.

[0045] Furthermore, such as Figures 4 to 6 As shown, the bottom mold positioning strip 118 is located 56mm below the bottom arc panel of the side mold panel 116. The bottom mold positioning strip 118 is 6mm wide. Multiple reinforcing ribs 134 are installed under the bottom mold positioning strip 118, connecting the bottom mold positioning strip 118 and the side mold panel 116. On the one hand, this ensures that the bottom mold positioning strip 118 can precisely match the side mold positioning block 112, guaranteeing a tight fit; on the other hand, it ensures the reliability and stability of the bottom mold positioning strip 118.

[0046] Furthermore, such as Figure 1 and Figure 3 As shown, anchor bolts 136 are installed under the bracket of the side mold support main frame 114, which can adjust the height of the side mold panel 116 so that the side mold and the bottom mold can be tightly spliced.

[0047] Furthermore, the 104 steel structure section of the bottom formwork panel is broken into standard sections every 6m to facilitate the maintenance of the bottom formwork.

[0048] Furthermore, the buffer layer 110 is a 10mm thick EVA foam buffer layer 110, which can play a shock-absorbing and buffering role when the bottom mold vibrates, ensuring the vibration effect during pouring. The bottom mold and the side mold vibrate at the same time, making the vibration more uniform.

[0049] The assembly process of the precast box girder template structure proposed in this utility model is as follows:

[0050] Place the upper positioning sleeve 126 below the bottom formwork panel 104 into the lower positioning sleeve 128 embedded in the longitudinal center line of the concrete platform foundation, and adjust the position of the bottom formwork panel 104; move the side formwork support main frame 114, adjust the height of the anchor bolts 136 so that the bottom formwork positioning strip 118 corresponds to the side formwork positioning block 112, clamp the upper edge of the bottom formwork positioning strip 118 with the lower edge of the side formwork positioning block 112, tighten the tie bolts 124, and realize the mold assembly.

[0051] In this utility model, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "join," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "join" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0052] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or unit 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 utility model.

[0053] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0054] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A precast box girder formwork structure, characterized by, include: Two I-beam-shaped supporting main beams are arranged along the length of the precast box girder; The bottom formwork panel is located above the I-beam support beam; Multiple channel steel stiffening frames are installed under the bottom formwork panel, with the slots of the channel steel stiffening frames facing outwards; multiple distribution support beams are distributed at intervals below the channel steel stiffening frames, and the distribution support beams connect the bottom formwork panel, the channel steel stiffening frames, and the I-shaped support main beam. A buffer layer is installed between the distribution support beams and the channel steel stiffening frames; side formwork positioning blocks are located below the lower edges of the channel steel stiffening frames on both sides of the bottom formwork panel, and the buffer layer is located between two side formwork positioning blocks; a side formwork support main frame; a side formwork panel is installed on the side formwork support main frame; a bottom formwork positioning strip is installed below the bottom arc panel of the side formwork panel, and the bottom formwork positioning strip corresponds to the position of the side formwork positioning block. When the formwork is closed, the upper edge of the bottom formwork positioning strip is locked with the lower edge of the side formwork positioning block; a sponge anti-grouting rod is embedded in the slots of the channel steel stiffening frames on both sides of the bottom formwork panel and protrudes outwards from the slots.

2. The precast box girder formwork structure according to claim 1, wherein, Also includes: Multiple channel steel transition structures are installed between the I-beam support beam and the channel steel stiffening frame; Multiple tie bolts are detachably installed within the channel steel transition structure to secure the bottom mold and side mold during mold closing.

3. The precast box beam form structure of claim 1, wherein, Also includes: An upper positioning sleeve is located below the bottom mold panel; The lower positioning sleeve is pre-embedded in the longitudinal centerline of the concrete platform foundation, so that the horizontal and vertical displacement of the bottom formwork panel can be restricted by the cooperation of the upper and lower positioning sleeves.

4. The precast box beam form structure of claim 1, wherein, Also includes: A vibration motor mounting plate is located below the bottom mold panel; An attached vibrator is mounted on the mounting plate of the vibration motor.

5. The precast box beam form structure according to any one of claims 1 to 4, wherein, The bottom mold positioning strip is located 56mm below the bottom arc panel of the side mold panel. The bottom mold positioning strip is 6mm wide. Multiple reinforcing ribs are installed under the bottom mold positioning strip, and the multiple reinforcing ribs connect the bottom mold positioning strip and the side mold panel.

6. The precast box girder formwork structure according to claim 5, wherein, Also includes: Anchor bolts are installed below the legs of the side formwork support frame to adjust the height of the side formwork panel.

7. The precast box beam form structure of claim 6, wherein, The bottom formwork panel steel structure is broken into standard sections every 6m.

8. The precast box beam form structure of claim 7, wherein, The buffer layer is a 10mm thick EVA foam buffer layer.

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