Bottom formwork platform for lifting holes of precast beam piers and its usage method

Abstract

This invention discloses a bottom formwork platform for lifting beam holes on precast beam pedestals and its usage method, relating to the field of building construction technology. It includes a bottom formwork set at the lifting beam hole location on the precast beam pedestal. The bottom of the bottom formwork has an installation part, and a water-stop rubber strip is installed inside the installation part. Baffles for sealing the lifting beam hole are hinged to both sides of the bottom of the bottom formwork. This invention solves both the problem of discontinuous channel steel in the lifting beam hole, thus avoiding grout leakage, and the space problem of the steel wire rope during beam lifting.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a bottom formwork platform for lifting beam holes on precast beam platforms and its usage method. Background Technology

[0002] Precast beams, especially large-span precast beams, are generally hoisted from the bottom, which means that the platform must be broken at the hoisting position. That is, a hoisting hole is formed between two adjacent platforms, and a bottom steel plate is set at the hoisting hole position so that the platform is a continuous integral structure during precasting. That is, the platform and the bottom steel plate serve as the bottom formwork, and the precast beam formwork serves as the side formwork, which is assembled on both sides of the platform. The two sides of the platform are usually formed with U-shaped channel steel to form grout-stopping grooves. Grout-stopping strips are inserted into the grout-stopping grooves to stop grouting and form a closed model. Concrete is poured through the top of the formwork to form the precast beam.

[0003] However, the existing bottom steel plate is laid flat directly on the pedestal on both sides of the lifting hole, and is joined to the top steel plate of the pedestal with a flat joint. After the precast beam is fabricated, the bottom steel plate is sandwiched between the precast beam and the pedestal and cannot be removed. When it is necessary to move the precast beam, the bottom lifting and beam-lifting device moves the bottom steel plate and the precast beam together through the lifting hole. This means that the next process after the beam is moved must wait until the beam is moved and the bottom steel plate is retrieved and placed back in the position of the pedestal lifting hole before it can be carried out. In other words, the steel cage can only be lifted and the next beam can be precast after the bottom steel plate that has been lifted away is placed back in the position of the lifting hole. This increases the waiting time between construction processes and reduces construction efficiency. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a bottom mold platform for lifting holes of precast beam platform and a method of using it, which can not only avoid grout leakage, but also improve the efficiency of demolding and transportation of precast beams, thereby improving the efficiency of mass production of precast beams.

[0005] The bottom formwork platform for lifting beam holes on precast beam platforms and the method of using it provided by this invention adopt the following technical solution:

[0006] In a first aspect, a bottom formwork platform for a precast beam platform lifting hole includes a bottom formwork disposed at the lifting hole position of the precast beam platform, the bottom of the bottom formwork having an installation part, a water-stop rubber strip being disposed in the installation part of the bottom formwork, and baffles for sealing the lifting hole being hinged to both sides of the bottom of the bottom formwork.

[0007] Furthermore, channel steel is fixed on both sides of the bottom of the bottom template to form an installation part, the opening of the installation part faces both sides of the bottom template, and a fixing member for fixing the water-stop rubber strip is provided at the position of the installation part on the bottom template.

[0008] Furthermore, the mounting part includes a vertical plate vertically disposed at the bottom of the bottom template and a clamping plate disposed at the end of the vertical plate.

[0009] Furthermore, the clamping plate includes a mounting plate and a clamping plate that are perpendicular to each other. The mounting plate is inserted into the vertical plate from the bottom and can be slidably disposed on the vertical plate to adjust the distance between the clamping plate and the bottom of the bottom template. The vertical plate is provided with bolts for fixing the mounting plate to the vertical plate.

[0010] Furthermore, the side of the vertical plate is evenly provided with a plurality of fixing holes for bolts to pass through and fix the mounting plate, and the fixing holes on the two vertical plates are located in the same position.

[0011] Furthermore, the fixing member is a screw rod, which is threaded onto the clamping plate and passes through the water-stop rubber strip to limit the water-stop rubber strip within the mounting part.

[0012] Secondly, a method for using a bottom formwork platform for lifting beam holes on a precast beam platform includes the following steps:

[0013] S1. When precasting T-beams on the precast platform, position the lifting hole of the precast beam platform in the bottom formwork;

[0014] S2. Adjust the distance between the card plate and the bottom of the bottom template, put the water-stop rubber strip into the installation part, and use the fasteners to fix the water-stop rubber strip.

[0015] S3. Cast precast T-beams with poured concrete;

[0016] S4. Demold, remove the fasteners, loosen the clamping plate, and remove the water-stop rubber strip;

[0017] S5. Insert a steel wire rope into the lifting hole and lift the precast beam.

[0018] In summary, the present invention has at least one of the following beneficial effects: the present invention not only solves the problem of discontinuity of the channel steel in the lifting beam hole, thereby avoiding grout leakage, but also solves the space problem of the wire rope during beam lifting. Attached Figure Description

[0019] Figure 1 This is a structural illustration of an embodiment of the present invention. Figure 1 ;

[0020] Figure 2 This is a structural illustration of an embodiment of the present invention. Figure 2 .

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Bottom template; 11. Installation part; 111. Vertical plate; 112. Clamping plate; 12. Water-stop rubber strip; 13. Baffle; 14. Fasteners. Detailed Implementation

[0023] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0024] The following is in conjunction with the appendix Figure 1-2 The present invention will be described in further detail below.

[0025] This invention discloses a bottom formwork platform for a precast beam platform with a lifting hole. (Refer to...) Figure 1 The bottom formwork platform for the lifting hole of the precast beam platform includes a bottom formwork 1 set at the position of the lifting hole of the precast beam platform. The bottom of the bottom formwork 1 is provided with an installation part 11. A water-stop rubber strip 12 is provided in the installation part 11 of the bottom formwork 1. Baffles 13 for sealing the lifting hole are hinged on both sides of the bottom of the bottom formwork 1. The water-stop rubber strip 12 is fixed in the installation part 11, which can prevent the water-stop rubber strip 12 from falling off and leaking grout during beam making. At the same time, the baffles 13 can seal the lifting hole, which can prevent concrete from entering the lifting hole and sealing the lifting hole when pouring concrete.

[0026] In this embodiment, the mounting part 11 is a channel steel, and the opening of the mounting part 11 faces both sides of the bottom template 1. The water-stop rubber strip 12 extends along the channel steel and is inserted into the channel steel. The bottom template 1 is provided with a fixing member 14 for fixing the water-stop rubber strip 11 at the position of the mounting part 11. In this embodiment, the fixing member 14 is a screw rod. The fixing member 14 is threaded on the clamping plate 112 and passes through the water-stop rubber strip 12 to limit the water-stop rubber strip 11 in the mounting part 11. The fixing member 14 can fix the water-stop rubber strip 12 in the mounting part 11 to prevent the water-stop rubber strip 12 from falling off.

[0027] In this embodiment, the mounting part 11 includes a vertical plate 111 vertically disposed at the bottom of the bottom template 1 and a clamping plate 112 disposed at the end of the vertical plate 111. The clamping plate 112 includes a mounting plate and a clamping plate that are perpendicular to each other. The mounting plate is inserted into the vertical plate 111 from the bottom and can be slidably disposed on the vertical plate 111 to adjust the distance between the clamping plate 112 and the bottom of the bottom template 1. The vertical plate 111 is provided with bolts for fixing the mounting plate to the vertical plate 111. By sliding the clamping plate 112 up and down, the distance between the clamping plate 112 and the bottom of the bottom template 1 can be adjusted. When installing the water-stop rubber strip 12, by moving the clamping plate 112 upward, the water-stop rubber strip 12 can be clamped to the bottom of the bottom template 1 by the clamping plate 112, which plays a role in fixing the water-stop rubber strip 12.

[0028] Meanwhile, to avoid the different heights of the clamping plates 112 on both sides of the bottom of the bottom template 1, the sides of the vertical plate 111 are evenly provided with multiple fixing holes for bolts to pass through and fix the mounting plate. The fixing holes on the two vertical plates 111 are set in the same position, and the clamping plates 112 can be fixed at the same height through the fixing holes in the same position.

[0029] This embodiment also discloses a method for using a bottom formwork platform for lifting beam holes on a precast beam platform, including the following steps:

[0030] Step 1: When precasting T-beams on the precast platform, position the lifting holes of the precast beam platform on the bottom formwork 1.

[0031] Step 2: Adjust the distance between the card plate 112 and the bottom of the bottom template 1, put the water-stop rubber strip 12 into the installation part 11, and use the fastener 14 to fix the water-stop rubber strip 12.

[0032] Step 3: Pour concrete to precast T-beams;

[0033] Step 4: Demold, remove the fastener 14, loosen the clamping plate 112, and remove the water-stop rubber strip 12;

[0034] Step 5: Insert a steel wire rope into the lifting hole and lift the precast beam.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A bottom formwork platform for lifting beam holes on a precast beam platform, characterized in that: Includes a bottom template (1) set at the position of the lifting beam hole on the precast beam platform. The bottom of the bottom template (1) is provided with an installation part (11). A water-stop rubber strip (12) is provided in the installation part (11) of the bottom template (1). Baffles (13) for sealing the lifting beam hole are hinged on both sides of the bottom of the bottom template (1). The bottom template (1) has channel steel fixed on both sides to form mounting parts (11). The openings of the mounting parts (11) face the sides of the bottom template (1). The bottom template (1) is provided with a fixing member (14) for fixing the water-stop rubber strip (12) at the mounting part (11). The mounting part (11) includes a vertical plate (111) vertically disposed at the bottom of the bottom template (1) and a clamping plate (112) disposed at the end of the vertical plate (111). The card plate (112) includes a mounting plate and a limiting plate that are perpendicular to each other. The mounting plate is inserted into the vertical plate (111) from the bottom and can be slidably set on the vertical plate (111) to adjust the distance between the card plate (112) and the bottom of the bottom template (1). The vertical plate (111) is provided with bolts for fixing the mounting plate to the vertical plate (111).

2. The bottom formwork platform for the beam lifting hole of the precast beam platform according to claim 1, characterized in that: The side of the vertical plate (111) is evenly provided with a plurality of fixing holes for bolts to pass through and fix the mounting plate, and the fixing holes on the two vertical plates (111) are located in the same position.

3. The bottom formwork platform for the beam lifting hole of the precast beam platform according to claim 1, characterized in that: The fixing member (14) is a screw rod. The fixing member (14) is threaded onto the limiting plate and passes through the water-stop rubber strip (12) to limit the water-stop rubber strip (12) within the mounting part (11).

4. A method for using a bottom formwork platform for lifting beam holes on a precast beam platform, characterized in that: The bottom formwork platform for the lifting hole of the precast beam platform as described in any one of claims 1-3 includes the following steps: S1. When precasting T-beams on the precast beam platform, the bottom formwork (1) is set at the beam lifting hole position of the precast beam platform; S2. Adjust the distance between the bottom of the card plate (112) and the bottom of the bottom template (1), put the water-stop rubber strip (12) into the installation part (11), and use the fastener (14) to fix the water-stop rubber strip (12); S3. Cast precast T-beams with poured concrete; S4. Demold, remove the fastener (14), loosen the clamping plate (112), and remove the water-stop rubber strip (12); S5. Insert a steel wire rope into the lifting hole and lift the precast T-beam.

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