Formwork-removal-free prefabricated part for prefabricated T-beam wet joint and construction method

Abstract

The invention provides a formwork-removal-free prefabricated part of a prefabricated T-beam wet joint and a construction method, the prefabricated part comprises a first prefabricated part and a second prefabricated part, and the first prefabricated part and the second prefabricated part are arranged in a staggered mode along the wet joint of the prefabricated T-beam. The construction method has the beneficial effects that the first prefabricated part and the second prefabricated part are directly used as bottom dies to be installed at the bottom of the wet joint, installation and use of formworks are omitted, the formworks do not need to be dismantled, the structure is simple, operation is convenient and fast, the construction progress is accelerated, and the construction efficiency is improved. The first prefabricated part, the second prefabricated part and the prefabricated T-beam can be mutually clamped and spliced, gap plugging through a gap filling material is not needed, the appearance quality of concrete after wet joint is completed is guaranteed, and potential safety hazards are reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of construction engineering, and in particular relates to a precast component and a construction method for the wet joint of a precast T-beam without formwork removal. Background Art

[0002] The traditional construction of the wet joint of a precast T-beam is carried out using a construction plan of hoisting formwork. After the wet joint is poured and reaches the formwork removal strength, the formwork at the bottom of the wet joint is removed. In the process of formwork installation, it is necessary to leave holes for steel bar tensioning to prevent the formwork from loosening during the concrete pouring process. After the formwork is removed, the tensioning holes need to be blocked. After the installation of the bottom formwork of the wet joint, it is necessary to fill the gaps between the formworks and the gaps between the formwork and the concrete structure of the T-beam to prevent the loss of concrete slurry during the concrete pouring process, which may cause quality defects in the appearance of the wet joint concrete. After the formwork is removed, the caulking material needs to be cleaned, and there is a safety risk of construction workers falling from a height during the cleaning process. Moreover, there is also a safety hazard of formwork falling and injuring people during the formwork removal process. Summary of the Invention

[0003] To solve the above technical problems, the present invention provides a precast component and a construction method for the wet joint of a precast T-beam without formwork removal, effectively solving the technical problems of the cumbersome construction steps and safety hazards of using formwork in the wet joint of a precast T-beam, and overcoming the deficiencies of the prior art.

[0004] The technical solution adopted by the present invention is: a precast component for the wet joint of a precast T-beam without formwork removal, including a first precast component and a second precast component, and the first precast component and the second precast component are arranged alternately along the wet joint of the precast T-beam.

[0005] Further, both the first precast component and the second precast component include a base, and the base is engaged with the precast T-beam.

[0006] Further, first notches are provided on both sides of the base close to the precast T-beam, and the first notches are engaged with the precast T-beam.

[0007] Further, second notches are provided on the other two sides of the base, so that the first precast component and the second precast component are engaged with each other.

[0008] Further, a steel bar mesh is provided inside the base.

[0009] Further, anchoring steel bars are provided on the base for connecting the reserved steel bars of the precast T-beam.

[0010] Further, the anchoring steel bars are arranged at intervals along the length of the wet joint.

[0011] The present invention also provides a construction method for a precast component using a precast T-beam wet joint that does not require formwork removal, including the following steps:

[0012] Precast the first precast component and the second precast component;

[0013] Interleave the first precast component and the second precast component in the wet joint of the precast T-beam;

[0014] Perform the pouring of the wet joint concrete.

[0015] Furthermore, both the first precast component and the second precast component include a base, the base is clamped on the precast T-beam, and the bases of the first precast component and the second precast component are clamped with each other.

[0016] Furthermore, the base is provided with anchoring steel bars, and the anchoring steel bars are connected to the reserved steel bars of the precast T-beam.

[0017] The advantages and positive effects of the present invention are as follows: Due to the adoption of the above technical solution, by directly using the first precast component and the second precast component as the bottom formwork and installing them at the bottom of the wet joint, the installation and use of the formwork are saved, there is no need to remove the formwork, the structure is simple, the operation is convenient, the construction progress is accelerated, the first precast component, the second precast component and the precast T-beam can be mutually clamped and assembled, there is no need to use caulking materials to seal the gaps, the appearance quality of the concrete after the wet joint is completed is ensured, and the potential safety hazards are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By describing the embodiments of the present invention in more detail in combination with the drawings, the above and other objects, features and advantages of the present invention will become more obvious. The drawings are used to provide a further understanding of the embodiments of the present invention, and constitute a part of the specification, and are used to explain the present invention together with the embodiments of the present invention, and do not constitute a limitation to the present invention. In the drawings, the same reference numerals generally represent the same components or steps.

[0019] Figure 1 is a splicing schematic diagram of a precast component of a precast T-beam wet joint without formwork removal and a precast T-beam according to an embodiment of the present invention.

[0020] Figure 2 is a schematic diagram of the connection of the anchoring steel bars between a precast component of a precast T-beam wet joint without formwork removal and a precast T-beam according to an embodiment of the present invention.

[0021] Figure 3 is a structural diagram of the first precast component of a precast component of a precast T-beam wet joint without formwork removal according to an embodiment of the present invention.

[0022] Figure 4It is the structural diagram of the second precast component of a precast T-beam wet joint that does not require form removal according to an embodiment of the present invention.

[0023] Figure 5 It is the splicing schematic diagram of the first precast component and the second precast component of a precast T-beam wet joint that does not require form removal according to an embodiment of the present invention.

[0024] Figure 6 It is the top view of a precast T-beam wet joint that does not require form removal according to an embodiment of the present invention.

[0025] Figure 7 It is the cross-sectional view of a precast T-beam wet joint that does not require form removal according to an embodiment of the present invention.

[0026] In the figure:

[0027] 1. First precast component 2. Second precast component 3. Precast T-beam

[0028] 4. Base 5. First notch 6. Second notch

[0029] 7. Steel mesh 8. Anchor bar 9. Reserved bar Specific implementation manner

[0030] An embodiment of the present invention provides a precast component and a construction method for a precast T-beam wet joint that does not require form removal. The embodiments of the present invention will be described below with reference to the accompanying drawings.

[0031] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "set", "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0032] Such as Figure 1 and Figure 2As shown in the figure, a precast component with a precast T-beam wet joint without form removal in an embodiment of the present invention includes a first precast component 1 and a second precast component 2, and the first precast component 1 and the second precast component 2 are arranged alternately along the wet joint of the precast T-beam 3. The first precast component 1 and the second precast component 2 are made of concrete with a concrete grade greater than or equal to that of the precast T-beam 3 and are spliced with the precast T-beam 3. The first precast component 1 and the second precast component 2 are directly installed at the bottom of the wet joint as the bottom form of the wet joint, and their widths are the same as the width of the wet joint, without the need to use a separate form. The lengths of the first precast component 1 and the second precast component 2 are selected according to the length of the wet joint. Multiple first precast components 1 and second precast components 2 are spliced alternately along the wet joint.

[0033] Specifically, as Figure 3 , Figure 4 and Figure 5 Both the first precast component 1 and the second precast component 2 include a base 4, and the base 4 is engaged with the precast T-beam 3. The bases 4 of the first precast component 1 and the second precast component 2 are spliced alternately at the bottom of the wet joint and are spliced with the precast T-beam 3. The bases 4 of the first precast component 1 and the second precast component 2 are directly used as the bottom form of the wet joint.

[0034] Preferably, as Figure 2 shown, in order to prevent a gap from existing when the base 4 is spliced with the precast T-beam 3, first notch openings 5 are provided on both sides of the base 4 close to the precast T-beam 3. The first notch openings 5 are arranged along the length of the base 4 and are engaged with the precast T-beam 3. The first notch openings 5 are arranged as stepped grooves, and stepped grooves are also opened at the relative positions of the precast T-beam 3 to be adapted and engaged with the first notch openings 5. By providing the first notch openings 5, the bases 4 of the first precast component 1 and the second precast component 2 are engaged with the precast T-beam 3, positioning the first precast component 1 and the second precast component 2, facilitating installation, and making the bottom of the base 4 flush with the bottom of the wet joint, avoiding a gap when the base 4 is spliced with the precast T-beam 3 and using caulking materials to seal the gap, which affects the appearance quality.

[0035] Preferably, as Figure 3 , Figure 4 and Figure 5As shown in the figure, in order to prevent gaps from existing between the bases 4 when the first precast member 1 and the second precast member 2 are spliced, second notches 6 are provided on the other two sides of the base 4. The bases 4 of the adjacent first precast member 1 and second precast member 2 are engaged through the second notches 6. The second notch 6 is set as a stepped notch. The second notches 6 on the bases 4 of the adjacent first precast member 1 and second precast member 2 are adapted to engage with each other. By providing the second notch 6, the bases 4 of the adjacent first precast member 1 and second precast member 2 are engaged and spliced with each other, positioning the splicing of the first precast member 1 and the second precast member 2, facilitating installation, and enabling the bases 4 of the adjacent first precast member 1 and second precast member 2 to be flush for clamping, avoiding gaps when the first precast member 1 and the second precast member 2 are spliced and using caulking materials to seal the gaps, which affects the appearance quality.

[0036] Preferably, as Figure 6 and Figure 7 shown, in order to ensure the structural strength of the base 4, a steel mesh 7 is fixed inside the base 4. The steel mesh 7 is pre-embedded when the precast base 4 is fabricated.

[0037] Specifically, as Figure 2 shown, anchoring steel bars 8 are provided on the base 4. The anchoring steel bars 8 are pre-embedded together with the steel mesh 7 when the precast base 4 is fabricated. The anchoring steel bars 8 are vertically arranged on the base 4 and are spaced at intervals along the length of the wet joint. The bottom of the anchoring steel bar 8 is connected to the steel mesh 7, and the top is provided with a bend to be inserted and fixed with the wet joint annular reserved steel bar 9 of the precast T-beam 3. In order to ensure the anchoring effect, multiple rows of anchoring steel bars 8 can be arranged along the length of the wet joint to be connected with the reserved steel bars 9 of the precast T-beam 3.

[0038] A construction method for precast members using the precast T-beam wet joint without form removal as described above includes the following steps:

[0039] S1: Fabricate the first precast member 1 and the second precast member 2;

[0040] Determine the widths of the first precast member 1 and the second precast member 2 according to the width of the wet joint. The lengths of the first precast member 1 and the second precast member 2 are reasonably selected according to the length of the wet joint and are usually set to 2.5 m. During the prefabrication process, the steel mesh 7 needs to be placed and the anchoring steel bars 8 are pre-embedded in advance. Pay attention to reserving the first notch 5 and the second notch 6 when fabricating the first precast member 1 and the second precast member 2. Pay attention to vibrating during the concrete pouring process. The concrete grades of the first precast member 1 and the second precast member 2 are greater than or equal to the concrete grade of the precast T-beam 3. Finish the surface before initial setting, and finally perform roughening treatment on the upper surface of the precast member, which is the contact surface with the wet joint concrete in the later stage, to strengthen the bonding with the wet joint concrete.

[0041] The first precast component 1 and the second precast component 2 need to be precast one month before the wet joint construction, and reach the 28-day strength requirement of the concrete when in use. After precasting, they should be covered and cured in time. During the precasting process of the precast T-beam 3, attention should be paid to reserving a stepped groove adapted to the base 4.

[0042] S2: Arrange the first precast component 1 and the second precast component 2 alternately in the wet joint of the precast T-beam 3;

[0043] During the wet joint construction, place the first precast component 1 and the second precast component 2 alternately directly below the wet joint. Pass 4 lifting ropes from top to bottom through the wet joint to the bottom, and connect and fix the lifting ropes to the anchor bars 8 at the four corners of the precast component. The construction workers above the wet joint work together to slowly lift the precast component until the base 4 contacts the precast T-beam 3 and the first notch 5 engages with the stepped groove on the precast T-beam 3. After the base 4 engages with the precast T-beam 3, adjust the anchor bars 8 so that the anchor bars 8 are inserted and welded to the annular reserved bars 9 of the wet joint of the precast T-beam 3 for fixation.

[0044] During the hoisting process, attention should be paid to alternately lifting and fixing the first precast component 1 and the second precast component 2, and the adjacent first precast component 1 and the second precast component 2 are spliced by engaging with each other using the second notch 6.

[0045] S3: Pour the wet joint concrete;

[0046] After all the first precast components 1 and the second precast components 2 are installed according to the above steps, install the wet joint steel bars, and finally pour the wet joint concrete.

[0047] The advantages and positive effects of the present invention are:

[0048] 1. Replace the bottom formwork. By directly installing the first precast component and the second precast component as the bottom formwork at the bottom of the wet joint, the installation and use of the formwork are saved, and there is no need to remove the formwork. The structure is simple, the operation is convenient, and the construction progress is accelerated.

[0049] 2. By setting the first notch and the second notch, the first precast component, the second precast component and the precast T-beam can be engaged and assembled with each other, and there is no need to use caulking materials to seal the gaps, ensuring the appearance quality of the concrete after the wet joint is completed.

[0050] 3. Reduce the risk of construction workers and formwork falling from height, and reduce potential safety hazards.

[0051] So far, the embodiments of the present disclosure have been described in detail with reference to the accompanying drawings. It should be noted that, in the accompanying drawings or the text of the specification, the implementation manners that are not illustrated or described are all forms known to those of ordinary skill in the art, and no detailed description is given. In addition, the above definitions of the various components are not limited to the specific structures, shapes or manners mentioned in the embodiments, and those of ordinary skill in the art can make simple changes or replacements thereto.

[0052] The embodiments of the present invention have been described in detail above, but the above content is only the preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the application of the present invention shall still fall within the scope covered by the patent of the present invention.

Claims

1. A precast component for the wet joint of precast T-beams without form removal, characterized in that: It includes a first precast component and a second precast component, and the first precast component and the second precast component are arranged alternately along the wet joint of the precast T-beam.

2. A precast component for the wet joint of precast T-beams without form removal, characterized in that: Both the first precast component and the second precast component include a base, and the base is engaged with the precast T-beam.

3. A precast component for the wet joint of a precast T-beam without form removal, characterized in that: First notches are provided on both sides of the base close to the precast T-beam, and the first notches are engaged with the precast T-beam.

4. A precast member for the wet joint of a precast T-beam without form removal, characterized in that: Second notches are provided on the other two sides of the base, so that the first precast component and the second precast component are engaged with each other.

5. A precast member for the wet joint of a precast T-beam without form removal, according to any one of claims 1-4, characterized in that: A steel mesh is provided inside the base.

6. A precast component for the wet joint of a precast T-beam without form removal, according to any one of claims 1-4, characterized in that: Anchoring steel bars are provided on the base for connecting the reserved steel bars of the precast T-beam.

7. A precast component for the wet joint of a precast T-beam without form removal, characterized in that: The anchoring steel bars are arranged at intervals along the length of the wet joint.

8. A construction method of using the precast component for the wet joint of the precast T-beam without form removal as described in claim 1, comprising the following steps: Precast the first precast component and the second precast component; Arrange the first precast component and the second precast component alternately in the wet joint of the precast T-beam; Conduct concrete pouring for the wet joint.

9. The construction method of a precast component with a precast T-beam wet joint without form removal, according to claim 8, is characterized in that: Both the first precast component and the second precast component include a base, the base is engaged on the precast T-beam, and the bases of the first precast component and the second precast component are engaged with each other.

10. The construction method of a precast component with a precast T-beam wet joint without form removal according to claim 9, characterized in that: Anchoring steel bars are provided on the base, and the anchoring steel bars are connected to the reserved steel bars of the precast T-beam.

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