Bottom die reverse hanging supporting system of long-piled wharf cast-in-place cross beam and construction method

Abstract

The invention discloses a bottom die reverse hanging supporting system of a high-pile wharf cast-in-place cross beam and a construction method, and belongs to the field of water transportation engineering. The system comprises a bottom die system, a supporting bracket and a hanging bar system. The supporting brackets are perpendicular to the axis direction of the single-row foundation piles, arranged on the front sides and the rear sides of the steel pipe piles and located in the cast-in-place beams. The bottom die system is positioned below the cast-in-place cross beam; the hanging bar system penetrates through the cast-in-place cross beam, the supporting bracket and the interior of the bottom die system and is fixedly connected with the bottom die system and the supporting bracket. The method comprises the following steps: constructing a support bracket, a hanging bar system and a bottom die system; cast-in-situ cross beams; and taking out the hanging bar system. The bottom die system of the system is used for bearing all the weight of the whole formwork system, the cast-in-place cross beam and the construction load and transferring all the weight to the supporting brackets, and the system is convenient to construct, stable in supporting and reliable in safety performance.

Description

Technical Field

[0001] The invention belongs to the field of water transport engineering, and in particular relates to a bottom formwork reverse hanging support system and a construction method for a cast-in-place beam of a high-pile wharf. Background Art

[0002] In the construction of high-pile wharfs, the bottom formwork support system of cast-in-place beams is a key construction link, which is directly related to the quality and safety of the project. The design of the bottom formwork support system must ensure sufficient strength and stability to withstand the weight of concrete and various loads during construction.

[0003] Chinese patent CN117071543A (publication date: November 17, 2023) discloses a bottom formwork support device for a cast-in-place beam of a high-pile wharf and its construction method. Steel vertical poles are buried in the pile core concrete, and inverted round steel is set to raise the bottom formwork support device to above the top surface of the cast-in-place beam. This method also inverts the bottom formwork support device, but since the center of gravity of the entire support system is raised, it is necessary to set up diagonal braces and other stability measures. The force is complex, the stability is poor, and there are safety risks.

[0004] Chinese patent CN105951668A (publication date: September 21, 2016) discloses a bottom formwork support system for cast-in-place beams of high-pile docks and a construction method thereof. A plurality of supporting brackets parallel to the axial direction of a single-row pile foundation are fixed to the circumferential surface of the casing, and a resting beam perpendicular to the axial direction of the single-row pile foundation is placed on the supporting brackets on the front and rear sides of the steel casing. This method places the bottom load-bearing beam directly on the supporting brackets. The advantages of this method are that the force is simple, and there is no need to set up an inverted bottom formwork support device. The brackets can be reused after being cut off; however, under environmental conditions of strong winds and waves at sea and large tidal ranges, the cutting efficiency of the brackets is very low, the safety risk is relatively large, and when the brackets are cut off, the anti-corrosion layer on the outer surface of the steel pipe pile is damaged, affecting the anti-corrosion life of the steel pipe pile.

[0005] In view of the above-mentioned unfavorable factors, the bottom formwork inverted hanging support system has complex process, low efficiency and poor adaptability to offshore construction, and there is room for improvement.

[0006] It can be seen that inventing a construction method for a bottom formwork inverted hanging support system that can adapt to the cast-in-place beam bottom formwork of offshore high-pile docks, reduce safety risks, protect the anti-corrosion performance of steel pipe piles, and improve construction efficiency is a problem that needs to be solved in this field. Summary of the invention

[0007] In order to reduce the safety risk of cast-in-place beams of docks, the present invention provides a bottom formwork reverse hanging support system and a construction method for cast-in-place beams of high-pile docks, the system comprising a bottom formwork system, a supporting corbel and a hanging bar system;

[0008] The bottom formwork system is located below the cast-in-place beam;

[0009] The supporting corbels are perpendicular to the axial direction of the single-row foundation piles, are arranged on the front and rear sides of the steel pipe piles, and are located inside the cast-in-place beam;

[0010] The hanger system runs through the cast-in-place beams, supporting corbels and bottom formwork system, and is fixedly connected to the bottom formwork system and the supporting corbels, so as to bear the total weight of the entire formwork system, cast-in-place beams and construction loads, and transfer all the weight to the supporting corbels.

[0011] Furthermore, the bottom formwork system includes two rows of bottom load-bearing beams, multiple grids, and bottom formwork; the two rows of bottom load-bearing beams are arranged along the axial direction of the single row of foundation piles and are arranged parallel to the front and rear sides of the steel pipe piles; multiple grids are vertically and evenly laid on the two rows of load-bearing beams, and the bottom formwork is fixedly laid on the grids.

[0012] Furthermore, the suspension rod system includes a precision-rolled screw rod, an upper nut, and a lower nut; the precision-rolled screw rod is fixed to the supporting corbel via the upper nut; and the precision-rolled screw rod is fixed to the bottom load-bearing beam via the lower nut.

[0013] Furthermore, the supporting corbel is π-shaped, and its height is consistent with the top height of the steel pipe pile; a hole is provided on the panel of the supporting corbel for passing the finishing screw.

[0014] Furthermore, steel pads are provided between the upper nut and the supporting corbel panel and between the lower nut and the bottom surface of the bottom load-bearing beam.

[0015] Furthermore, the length of the finishing screw is higher than the top surface of the cast-in-place beam; the finishing screw is also wrapped with a PVC tube on the outside to seal the finishing screw.

[0016] Furthermore, the load-bearing beam is two back-to-back channel steels, and a gap is reserved between the two channel steels for passing the finishing screw.

[0017] A construction method for a bottom formwork inverted hanging support system for a cast-in-place beam of a high-pile wharf comprises the following steps:

[0018] S1. Make a supporting corbel and weld the supporting corbel to the outer surface of the steel pipe pile;

[0019] S2. Insert the fine-rolled screw into the opening of the supporting corbel panel, place the steel pad, and put on the matching nut;

[0020] S3. Set up the bottom load-bearing beam, insert the fine rolling screw, place the steel pad, and put on the matching lower nut; adjust the elevation of the bottom load-bearing beam and tighten the lower nut;

[0021] S4. Lay a fixed grid on the bottom load-bearing beam, and lay a fixed bottom formwork on the grid;

[0022] S5. Wrap the PVC tube outside the finishing screw to completely seal the finishing screw;

[0023] S6, tying the crossbeam reinforcement, installing the formwork, and pouring the crossbeam concrete; the upper end of the finishing screw extends out of the upper surface of the cast crossbeam;

[0024] S7. After the cast-in-place beam concrete reaches the design strength, the load-bearing beam is temporarily fixed, the upper nut and the lower nut of the precision-rolled screw fixing the load-bearing beam are loosened, and the gasket and nut are removed;

[0025] S8. Unscrew the fine-rolled screw from the top surface of the cast-in-place beam and reuse it for other construction projects.

[0026] Compared with the prior art, the advantages and effects of this application are as follows:

[0027] 1. The present invention provides a bottom formwork inverted hanging support system for the cast-in-place beam of a high-pile wharf. A fixed force support point is formed by supporting the corbel, and the fixed force support point is located inside the cast-in-place beam. A precision-rolled screw is used to transfer the entire formwork system, the cast-in-place beam and the entire weight of the construction load to the supporting corbel, thereby reducing the difficulty of installing and dismantling the support system, protecting the anti-corrosion performance of the steel pipe piles, reducing safety risks and improving construction efficiency.

[0028] 2. The present invention provides a construction method for a bottom formwork inverted hanging support system for a cast-in-place beam of a high-pile wharf. The method has a simple process and is easy to use. The fine-rolled screw rod can be reused. The cast-in-place beam of a high-pile wharf constructed by this method can better adapt to the environment of strong winds and waves and tidal range at sea, greatly improving work efficiency.

[0029] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application so that it can be implemented in accordance with the contents of the specification, and to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following is a detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings as follows.

[0030] Based on the detailed description of the specific embodiments of the present application in combination with the accompanying drawings below, those skilled in the art will become more aware of the above and other objects, advantages and features of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0032] in:

[0033] Figure 1 A top view of a bottom formwork inverted hanging support system for a cast-in-place beam of a high-pile wharf according to an embodiment of the present invention;

[0034] Figure 2 It is a front view of a bottom formwork inverted hanging support system for a cast-in-place beam of a high-pile wharf according to one embodiment of the present invention;

[0035] Figure 3 A side view of a bottom formwork inverted hanging support system for a cast-in-place beam of a high-pile wharf according to an embodiment of the present invention;

[0036] Figure 4 It is a schematic diagram of a supporting corbel of a bottom formwork inverted hanging supporting system of a cast-in-place beam of a high-pile wharf according to an embodiment of the present invention;

[0037] Figure numerals: 1. bottom formwork system; 2. supporting corbel; 3. suspension rod system; 4. cast-in-place beam; 5. steel pipe pile; 11. bottom load-bearing beam; 12. grille; 13. bottom formwork; 31. precision-rolled screw; 32. upper nut; 33. lower nut; 34. steel pad. Specific embodiments

[0038] To make the purpose, technical scheme and advantages of the embodiment of the present application clearer, the technical scheme in the embodiment of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, rather than all of the embodiments. In the following description, specific details such as specific configuration and components are provided only to help fully understand the embodiments of the present application. Therefore, it should be clear to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, for clarity and brevity, the description of known functions and structures is omitted in the embodiment.

[0039] It should be understood that the references to "one embodiment" or "this embodiment" throughout the specification mean that the specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present application. Therefore, the references to "one embodiment" or "this embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0040] In addition, the present application may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0041] The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" in this article describes another type of association object relationship, indicating that there can be two relationships. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0042] The term "at least one" in this article is merely a description of the association relationship of associated objects, indicating that there may be three relationships. For example, at least one of A and B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0043] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusions.

[0044] Example 1

[0045] like Figure 1-3 The embodiment shown in the figure relates to a bottom formwork reverse hanging support system for cast-in-place beams of a high-pile wharf, comprising a bottom formwork system 1, a supporting corbel 2 and a hanging rod system 3;

[0046] The supporting corbels 2 are perpendicular to the axial direction of the single-row foundation piles, are arranged at the front and rear sides of the steel pipe piles, and are located inside the cast-in-place beam 4;

[0047] The bottom formwork system 1 is located below the cast-in-place beam 4;

[0048] The hanger rod system 3 passes through the cast-in-place beam 4, the supporting corbel 2 and the bottom formwork system 1, and is fixedly connected to the bottom formwork system 1 and the supporting corbel 2, so as to bear the total weight of the entire formwork system 1, the cast-in-place beam 4 and the construction load, and transfer all the weight to the supporting corbel 2.

[0049] Furthermore, the bottom formwork system 1 includes two rows of bottom load-bearing beams 11, multiple grids 12, and bottom formworks 13; the two rows of bottom load-bearing beams 11 are arranged along the axial direction of the single row of foundation piles, and are arranged parallel to the front and rear sides of the steel pipe piles; the multiple grids 12 are vertically and evenly laid on the two rows of bottom load-bearing beams 11, and are fixed to the two rows of load-bearing beams 11, and the bottom formworks 13 are fixedly laid on the grids 12.

[0050] Furthermore, the suspension rod system 3 includes a finishing screw 31, an upper nut 32, and a lower nut 33; the finishing screw 31 is fixed to the supporting corbel 2 through the upper nut 32; the finishing screw 31 is fixed to the bottom load-bearing beam 11 through the lower nut 33.

[0051] Furthermore, the supporting corbel 2 is π-shaped and welded to the outer surface of the steel pipe pile 5. Its height is consistent with the top height of the steel pipe pile. It is located inside the cast-in-place beam 4 and is not reused. A hole is opened on the panel of the supporting corbel 2 for passing the finishing screw 31.

[0052] Furthermore, steel pads 34 are provided between the upper nut 32 and the panel of the supporting corbel 2 and between the lower nut 33 and the bottom surface of the bottom load-bearing beam 11 .

[0053] Furthermore, the length of the finishing screw 31 is higher than the top surface of the cast-in-place beam 4; the finishing screw 31 is also wrapped with a PVC tube on the outside to seal the finishing screw 31 and protect it from being contaminated by concrete during the pouring of concrete on the cast-in-place beam 4. After the concrete pouring of the cast-in-place beam 4 is completed and reaches the designed strength, the finishing screw 31 can be freely screwed out.

[0054] Furthermore, the load-bearing beam 11 is two back-to-back channel steels, and a gap is reserved between the two channel steels for passing the finishing screw 31; the gap between the two back-to-back channel steels is aligned with the holes of the supporting horns.

[0055] Technical effect of this embodiment: This embodiment provides a bottom formwork inverted support system for cast-in-place beams of high-pile docks, which uses precision-rolled screws to transfer the entire weight of the entire formwork system, cast-in-place beams and construction loads to the supporting corbels, and the precision-rolled screws are reusable.

[0056] Example 2

[0057] This embodiment provides a construction method for a bottom formwork inverted hanging support system for a cast-in-place beam of a high-pile wharf based on Embodiment 1, comprising the following steps:

[0058] S1, making a supporting corbel 2, and welding the supporting corbel 2 to the outer surface of the steel pipe pile;

[0059] S2, insert the finishing screw 31 into the opening of the support bracket 2 panel, place the steel pad, and put on the matching nut 32;

[0060] S3, erect the bottom load-bearing beam 11, and use a hand chain hoist to fine-tune the elevation of the bottom mold system according to the elevation marked by the surveyor, so that the entire bottom mold system is on the same horizontal plane. After the adjustment is completed, insert the finishing screw 31, place the steel pad, put on the matching lower nut 33, and tighten the lower nut 33;

[0061] S4, laying a fixed grid 12 on the bottom load-bearing beam 11, and laying a fixed bottom template 13 on the grid 12;

[0062] S5, wrapping the PVC tube outside the finishing screw 31 to completely seal the finishing screw 31;

[0063] S6, tying the crossbeam steel bars, installing the formwork, and pouring the crossbeam concrete; the upper end of the finishing screw extends out of the upper surface of the cast crossbeam 4;

[0064] S7, after the concrete of the cast-in-place beam 4 reaches the design strength, the load-bearing beam is temporarily fixed, the upper nut 32 and the lower nut 33 of the finishing screw 31 fixing the load-bearing beam are loosened, and the gasket and the nut are removed;

[0065] S8. Screw out the finishing screw 31 on the top surface of the cast-in-place beam 4 and reuse it for other constructions.

[0066] Technical effect of this embodiment: The construction method of the bottom formwork inverted hanging support system of the cast-in-place beam of the high-pile wharf provided by this embodiment is simple in process, easy to use and high in work efficiency.

[0067] Example 3

[0068] Based on Embodiments 1 and 2, this embodiment provides a bottom formwork reverse hanging support system for cast-in-place beams of high-pile docks, including a bottom formwork system 1, a supporting corbel 2, and a hanging rod system 3;

[0069] The supporting corbels 2 are perpendicular to the axial direction of the single-row foundation piles, are arranged at the front and rear sides of the steel pipe piles, and are located inside the cast-in-place beam 4;

[0070] The bottom formwork system 1 is located below the cast-in-place beam 4;

[0071] The hanger rod system 3 passes through the cast-in-place beam 4, the supporting corbel 2 and the bottom formwork system 1, and is fixedly connected to the bottom formwork system 1 and the supporting corbel 2, so as to bear the total weight of the entire formwork system 1, the cast-in-place beam 4 and the construction load, and transfer all the weight to the supporting corbel 2.

[0072] Furthermore, the bottom formwork system 1 includes two rows of bottom load-bearing beams 11, multiple grids 12, and bottom formworks 13; the two rows of bottom load-bearing beams 11 are arranged along the axial direction of the single row of foundation piles, and are arranged parallel to the front and rear sides of the steel pipe piles; the multiple grids 12 are vertically and evenly laid on the two rows of bottom load-bearing beams 11, and are fixed to the two rows of load-bearing beams 11, and the bottom formworks 13 are fixedly laid on the grids 12.

[0073] Furthermore, the suspension rod system 3 includes a finishing screw 31, an upper nut 32, and a lower nut 33; the finishing screw 31 is fixed to the supporting corbel 2 through the upper nut 32; the finishing screw 31 is fixed to the bottom load-bearing beam 11 through the lower nut 33.

[0074] like Figure 4 As shown, the support corbel 2 is π-shaped, including a panel and two support plates, the two support plates are arranged below the panel, and a hole is provided on the panel of the support corbel 2 for passing the finishing screw 31. The support corbel horn is welded to the outer surface of the steel pipe pile 5, and its height is consistent with the top height of the steel pipe pile, and is located inside the cast-in-place beam 4.

[0075] Technical effect of this embodiment: The supporting horn panel of the bottom formwork reverse hanging support system of the cast-in-place beam of the high-pile wharf provided by this embodiment has holes, which can be used in conjunction with the finishing screw to transfer the entire weight of the cast-in-place beam to the supporting horn.

[0076] The above description is only the preferred embodiment of the present invention, which does not limit the protection scope of the present invention. For those skilled in the art, the present invention may have various modifications and changes. Within the spirit and principle of the present invention, the changes, modifications, replacements, integrations and parameter changes of these embodiments by conventional substitutions or capable of achieving the same functions without departing from the principles and spirit of the present invention all fall within the protection scope of the present invention.

Claims

1. A bottom formwork inverted support system for cast-in-place beams of high-pile docks, characterized in that: It comprises a bottom mold system (1), a supporting corbel (2) and a hanging rod system (3); The bottom formwork system (1) is located below the cast-in-place beam (4); The supporting bracket (2) is perpendicular to the axial direction of the single-row foundation piles, is arranged on the front and rear sides of the steel pipe piles, and is located inside the cast-in-place beam (4); The hanger bar system (3) passes through the cast-in-place crossbeam (4), the supporting corbel (2) and the bottom formwork system (1), and is fixedly connected to the bottom formwork system (1) and the supporting corbel (2), and is used to bear the total weight of the entire formwork system (1), the cast-in-place crossbeam (4) and the construction load, and transfer the total weight to the supporting corbel (2).

2. According to claim 1, a bottom formwork inverted support system for cast-in-place beams of high-pile docks is characterized in that: The bottom formwork system (1) comprises two rows of bottom load-bearing beams (11), a plurality of grids (12), and a bottom formwork (13); the two rows of bottom load-bearing beams (11) are arranged along the axial direction of a single row of foundation piles and are arranged in parallel on the front and rear sides of the steel pipe piles; the plurality of grids (12) are vertically and evenly laid on the two rows of bottom load-bearing beams (11), and the bottom formwork (13) is fixedly laid on the grids (12).

3. The bottom formwork reverse hanging support system for cast-in-place beams of high-pile docks according to claim 1 is characterized in that: The hanger bar system (3) comprises a finishing screw (31), an upper nut (32), and a lower nut (33); the finishing screw (31) is fixed to the supporting corbel (2) via the upper nut (32); and the finishing screw (31) is fixed to the bottom load-bearing beam (11) via the lower nut (33).

4. A bottom formwork inverted hanging support system for cast-in-place beams of high-pile docks according to claim 1 or 3, characterized in that: The supporting corbel (2) is π-shaped, and its height is consistent with the height of the top of the steel pipe pile; a hole is provided on the panel of the supporting corbel (2) for passing the finishing screw (31).

5. The bottom formwork inverted hanging support system for cast-in-place beams of high-pile docks according to claim 3 is characterized in that: Steel pads (34) are provided between the upper nut (32) and the panel of the supporting corbel (2), and between the lower nut (33) and the bottom surface of the bottom load-bearing beam (11).

6. The bottom formwork inverted hanging support system for cast-in-place beams of high-pile docks according to claim 5, characterized in that: The length of the finishing screw (31) is higher than the top surface of the cast-in-place beam (4); the finishing screw (31) is also wrapped with a PVC tube on the outside to seal the finishing screw (31).

7. The bottom formwork inverted hanging support system for cast-in-place beams of high-pile docks according to claim 6, characterized in that: The load-bearing beam (11) is two channel steels placed back to back, with a gap between the two channel steels for passing the finishing screw (31).

8. A construction method for a bottom formwork inverted hanging support system for a cast-in-place beam of a high-pile wharf according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1, making a supporting corbel (2), and welding the supporting corbel (2) to the outer surface of the steel pipe pile; S2, insert the finishing screw (31) into the opening of the panel of the supporting bracket (2), place the steel pad, and put on the matching nut (32); S3, erect the bottom load-bearing beam (11), insert the finishing screw (31), place the steel pad, and put on the matching lower nut (33); adjust the elevation of the bottom load-bearing beam (11), and tighten the lower nut (33); S4, laying a fixed grid (12) on the bottom load-bearing beam (11), and laying a fixed bottom template (13) on the grid (12); S5, wrapping the PVC tube outside the finishing screw (31) to completely seal the finishing screw (31); S6, tying the crossbeam reinforcement, installing the formwork, and pouring the crossbeam concrete; the upper end of the finishing screw extends out of the upper surface of the cast crossbeam (4); S7, after the concrete of the cast-in-place beam (4) reaches the designed strength, the load-bearing beam is temporarily fixed, the upper nut (32) and the lower nut (33) of the finishing screw (31) fixing the load-bearing beam are loosened, and the gasket and the nut are removed; S8. Screw out the finishing screw (31) on the top surface of the cast-in-place beam (4) and reuse it for other constructions.

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