High-pile wharf double-truss lower cross beam cast-in-place formwork supporting device

Abstract

A high-pile wharf double-truss lower cross beam cast-in-place formwork supporting device belongs to the technical field of cross beam cast-in-place formwork supporting and comprises round steel hanging bars, steel hoops, transverse supporting main beams, longitudinal supporting main beams and front edge steel pipe piles. The round steel hanging bars are hung on the first front edge steel pipe piles of the two adjacent bent frames of the high-pile wharf, and the transverse supporting main beams are reversely hung, specifically, the two ends of the transverse supporting main beams are reversely hung through the round steel hanging bars on the front edge steel pipe piles of the two adjacent bent frames; the front end of the longitudinal supporting main beam is mounted on the transverse supporting main beam, and the rest part of the longitudinal supporting main beam is mounted at the top of the steel hoop; the defects that in the prior art, a lower cross beam cast-in-place formwork supporting device is complex in mounting and dismounting construction and low in construction efficiency, the appearance quality of a cast-in-place cross beam is affected, and use of the supporting device is greatly limited are effectively overcome.

Description

Technical Field

[0001] This utility model belongs to the field of cast-in-place formwork support technology for crossbeams, specifically relating to a cast-in-place formwork support device for the lower crossbeams of a high-pile wharf. Background Technology

[0002] The most common structural form for inland river port terminals is the high-pile terminal, which is simple in structure and has good safety. The lower crossbeam is a critical component of the high-pile terminal, and the construction method for the lower crossbeam should be safe, efficient, and have controllable quality. Therefore, the design and construction of the cast-in-place formwork support for the lower crossbeam are key control points.

[0003] The support for the cast-in-place formwork of the lower crossbeam must have sufficient strength and rigidity, and be easy to install and dismantle. Two common methods are suspension with hanging rods and support with steel brackets. The most representative existing technology is the structure disclosed in patent application number "CN202322210750.9" entitled "Support Device for Bottom Formwork of Cast-in-Pile Crossbeam in High-Pile Wharf." As shown in its accompanying drawings and description, this structure involves pre-embedding support channel steel in the pile core concrete. A spreader beam is set at the top of the support channel steel, and inverted round steel is installed on the spreader beam. The inverted round steel passes through the main support beam to support the entire cast-in-place formwork system. This structure has sufficient strength and rigidity to ensure the safety of the cast-in-place lower crossbeam.

[0004] However, the installation and removal of the bottom formwork support device for the cast-in-place beam requires the pre-embedding of support channel steel in the pile core concrete, as well as the installation of a spreader beam. This makes the construction complex and inefficient. The entire bottom formwork is supported by round steel inverted supports, which have limited stability. After the bottom formwork of the cast-in-place beam is removed, the round steel must be cut off and repaired, affecting the appearance quality of the cast-in-place beam and greatly limiting the use of the support device. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a cast-in-place formwork support device for double lower crossbeams of a high-pile wharf. This device effectively avoids the drawbacks of existing technologies, such as complex installation and dismantling of cast-in-place formwork support devices for lower crossbeams, low construction efficiency, impact on the appearance quality of the cast-in-place crossbeams, and significant limitations on the use of the support device.

[0006] The present invention utilizes the following technical solution.

[0007] A cast-in-place formwork support device for double-span lower crossbeams of a high-pile wharf includes:

[0008] Round steel lifting rods, steel clamps, transverse support main beams, longitudinal support main beams and front steel pipe piles;

[0009] The round steel lifting bars are hung on the first leading steel pipe piles of the two adjacent frames of the high-pile wharf, and the transverse support main beam is suspended in reverse. Specifically, the two ends of the transverse support main beam are suspended in reverse by the round steel lifting bars on the leading steel pipe piles of the two adjacent frames.

[0010] The front end of the longitudinal support beam is installed on the transverse support beam, and the rest of the longitudinal support beam is installed on the top of the steel clamp.

[0011] Furthermore, the round steel suspension bar consists of three round steel bars, which are evenly arranged on the first leading steel pipe pile. The two ends of the round steel suspension bar pass through the transverse support main beam and are welded and fixed.

[0012] Furthermore, the steel clamps are fixed to the PHC pipe piles using high-strength bolts.

[0013] Furthermore, the top of the steel clamp is equipped with longitudinally supporting double-span main beams and longitudinally supporting main beams.

[0014] Furthermore, the front end of the longitudinally supporting double-span main beam is installed on the transversely supporting main beam, and the rear end of the longitudinally supporting double-span main beam is installed on the top of the steel clamp.

[0015] Furthermore, the longitudinally supporting double-span main beams are connected to the longitudinally supporting main beams to form a whole.

[0016] Furthermore, the secondary beam consists of a secondary beam body and a fixed beam; the secondary beam body is installed at equal intervals on the longitudinally supported double-span main beam and the longitudinally supported main beam, and a continuous fixed beam is arranged at each end of the secondary beam body.

[0017] Furthermore, the wharf's pile foundation consists of front steel pipe piles, steel columns, and PHC pipe piles arranged in parallel.

[0018] Furthermore, during the installation of the cast-in-place formwork support device for the double lower crossbeams of the high-pile wharf, steel clamps are installed on the PHC pipe piles, and round steel lifting bars are installed on the front steel pipe piles. The round steel lifting bars are evenly hung on the front steel pipe piles to suspend the transverse support main beam. The steel clamps are installed on the top of the longitudinal support main beam, and the front end of the longitudinal support main beam is installed on the transverse support main beam. The secondary beam body is installed at equal intervals on the longitudinal support main beam and tied and fixed. A continuous fixed beam is arranged at each end of the secondary beam body. The secondary beam body and the fixed beam form the secondary beam. The bottom formwork is fully laid on the secondary beam and fixed with iron nails. After the bottom formwork is laid, the steel bars and side formwork of the adjacent double lower crossbeams are installed, and concrete is poured.

[0019] Furthermore, when dismantling the bottom formwork, first loosen the high-strength bolts of the steel clamps to lower them to a certain height, thereby allowing the bottom formwork support system to detach from the bottom of the lower crossbeam. Then, dismantle the bottom formwork, secondary beams, longitudinal beam support main beams, transverse support main beams, steel clamps, and round steel lifting bars in sequence from top to bottom to complete the construction of the double lower crossbeams of the high-pile wharf.

[0020] The beneficial effects of this utility model are as follows: Compared with the prior art, the cast-in-place formwork support device for the double lower crossbeams of the high-pile wharf, comprising steel clamps, round steel lifting bars, transverse support main beams, longitudinal support main beams, secondary beams, and bottom formwork, is simple to manufacture, has high overall strength, high rigidity, and good safety. The steel clamps are connected by high-strength bolts, the support main beams are lapped and fixed, the secondary beams are bundled and fixed, and the bottom formwork is fixed with iron nails. The support system is simple and convenient to install and dismantle, and can complete the double lower crossbeams in one go, saving construction costs and increasing construction efficiency. Attached Figure Description

[0021] Figure 1 This is a plan view of the cast-in-place formwork support device for the double lower crossbeam of the medium-high pile wharf according to this utility model;

[0022] Figure 2 This is a sectional view of the cast-in-place formwork support device for the double lower crossbeam of the medium-high pile wharf according to this utility model;

[0023] Figure 3 yes Figure 2 A schematic diagram of the aa direction;

[0024] Figure 4 yes Figure 2 A schematic diagram of the bb direction;

[0025] Figure 5 yes Figure 2 A schematic diagram of the cc direction. Detailed Implementation

[0026] Because the cast-in-place formwork support device for the lower crossbeam requires pre-embedding of support channel steel in the pile core concrete, and also necessitates the installation of a spreader beam, its installation and dismantling are complex and inefficient. The entire bottom formwork uses round steel inverted supports, which generally result in poor stability. After dismantling the bottom formwork of the cast-in-place crossbeam, the round steel must be cut and repaired, affecting the appearance quality of the cast-in-place crossbeam and significantly limiting the use of the support device. The purpose of this utility model is to provide a cast-in-place formwork support system for double lower crossbeams of a high-pile wharf that is simple in structure, high in strength and rigidity, easy to install and dismantle, safe and efficient, and can be constructed in one go.

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The embodiments described in this application are merely some embodiments of this utility model, not all embodiments. Based on the spirit of this utility model, any other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] like Figures 1 to 5As shown, the cast-in-place formwork support device for double-beam lower crossbeams of a high-pile wharf according to this utility model includes:

[0029] The purpose of this utility model is to provide a cast-in-place formwork support system for the double lower crossbeams of a high-pile wharf that is simple in structure, high in strength and rigidity, easy to install and dismantle, safe and efficient, and can be constructed in one go.

[0030] This is a schematic diagram of a specific embodiment of the present invention, showing a cast-in-place formwork support device for the double lower crossbeams of a high-pile wharf, comprising:

[0031] 1. Round steel hanging rod, 2. Steel clamp, 3. Horizontal support main beam, 5. Longitudinal support main beam and 8. Front steel pipe pile;

[0032] The round steel lifting bar 1 is hung on the first leading steel pipe pile 8 of the two adjacent frames of the high-pile wharf, and the transverse support main beam 3 is suspended in reverse. Specifically, the two ends of the transverse support main beam 3 are suspended in reverse by the round steel lifting bar 1 on the leading steel pipe pile 8 of the two adjacent frames.

[0033] The front end of the longitudinal support beam 5 is installed on the transverse support beam 3, and the rest of the longitudinal support beam is installed on the top of the steel clamp.

[0034] In a preferred but non-limiting embodiment of this utility model, the round steel lifting bar 1 is composed of three round steel bars, which are evenly arranged on the first leading steel pipe pile 8. The two ends of the round steel lifting bar 1 pass through the transverse support main beam 3 and are welded and fixed.

[0035] In a preferred but non-limiting embodiment of this utility model, the steel clamp 2 is fixed to the PHC pipe pile 10 by high-strength bolts, closely adhering to the surface of the PHC pipe pile 10 to ensure sufficient friction.

[0036] In a preferred but non-limiting embodiment of this utility model, the top of the steel clamp 2 is equipped with a longitudinally supporting double-span main beam 4 and a longitudinally supporting main beam 5.

[0037] In a preferred but non-limiting embodiment of this utility model, the front end of the longitudinally supporting double-beam 4 is installed on the transversely supporting main beam 3, and the rear end of the longitudinally supporting double-beam 4 is installed on the top of the steel clamp 1.

[0038] In a preferred but non-limiting embodiment of this utility model, the longitudinal support double main beam 4 and the longitudinal support main beam 5 are connected to form a whole.

[0039] In a preferred but non-limiting embodiment of this utility model, the secondary beam 6 is composed of a secondary beam body 61, fixed beams 62, etc. The secondary beam body 61 is installed at equal intervals on the longitudinally supporting double-span main beam 4 and the longitudinally supporting main beam 5. Both ends of the secondary beam body 61 extend more than 1m beyond the lower crossbeam, with the excess portion reserved as a construction work platform. A continuous fixed beam 62 is arranged at each end of the secondary beam body 61 to improve the stability of the secondary beam and prevent displacement due to water flow and water level changes.

[0040] In a preferred but non-limiting embodiment of this utility model, the wharf pile foundation is composed of front steel pipe piles 8, steel columns 9, and PHC pipe piles 10 arranged in parallel.

[0041] In a preferred but non-limiting embodiment of this utility model, during the installation of the cast-in-place formwork support device for the double lower crossbeams of the high-pile wharf, steel clamps 2 are installed on the PHC pipe piles 10, and round steel lifting bars 1 are installed on the leading steel pipe piles 8. The round steel lifting bars 1 are evenly hung on the leading steel pipe piles 8, and the transverse support main beam 3 is suspended in reverse. The top of the steel clamps 2 is installed with the longitudinal support main beam 5, and the front end of the longitudinal support main beam 5 is installed on the transverse support main beam 3. The transverse support main beam 3 is installed close to the pile foundation. The longitudinal support main beam 4 extends beyond the lower crossbeam by more than 0.5m at both ends, with the excess portion reserved as a construction work platform. Secondary beam bodies 61 are installed at equal intervals on the longitudinal support main beam and tied and fixed to ensure that the secondary beam bodies 61 do not shift. The secondary beam bodies 61 extend beyond the lower crossbeam by more than 1m at both ends, with the excess portion reserved as a construction work platform. A continuous fixed beam 62 is arranged at each end of the secondary beam body 61. The secondary beam body 61 and the fixed beams 62 form the secondary beam 6. The bottom formwork 7 is fully laid on the secondary beam 6. The width and length of the bottom formwork 7 are consistent with the dimensions of the lower crossbeam. The bottom formwork 7 is fixed with nails or other means. After the bottom formwork 7 is laid, the reinforcing bars and side formwork of the adjacent double lower crossbeams are installed, and concrete is poured. After the concrete strength meets the design requirements, the support system of side formwork and bottom formwork is removed.

[0042] In a preferred but non-limiting embodiment of this utility model, when dismantling the bottom formwork support system, first loosen the high-strength bolts of the steel clamp 2 to lower it to a certain height, thereby allowing the bottom formwork support system to detach from the bottom of the lower crossbeam. Then, from top to bottom, dismantle the bottom formwork, secondary beam 6, longitudinal beam support main beam 5, transverse support main beam 3, steel clamp 2, and round steel lifting rod 1 in sequence to complete the construction of the double lower crossbeams of the high-pile wharf. This cast-in-place formwork support system has a simple structure, high strength, high rigidity, and good safety. It is convenient to install and dismantle, and can construct both lower crossbeams at once, resulting in high construction efficiency.

[0043] The round bar suspension bar is used to suspend the transverse support main beam and is welded to the transverse support main beam for fixation. However, bolt fixing and other connections can also achieve this utility model. Therefore, welding connection is the alternative solution.

[0044] In other words, the principle of this utility model is as follows: For high-pile wharves using steel berthing components, the pile foundation consists of front-end berthing steel pipe piles and PHC pipe piles, typically with a diameter smaller than that of the PHC pipe piles. The cast-in-place formwork support device uses two adjacent lower crossbeams as a group, supported by steel clamps and suspended by round steel lifting bars. The steel clamps are installed on the PHC pipe piles, and the round steel lifting bars are installed on the steel pipe piles. The round steel lifting bars are evenly hung on the steel pipe piles, suspending the transverse support main beam. A longitudinal support main beam is installed on top of the steel clamps, and the front end of the longitudinal support main beam is installed on the transverse support main beam, ensuring the support main beam is tightly attached to the pile foundation during installation. Both ends of the longitudinal support main beam extend more than 0.5m beyond the lower crossbeam, with the excess portion reserved as a construction work platform. Secondary beams are installed at equal intervals on the longitudinal support main beam and secured with binding to prevent displacement. Both ends of the secondary beams extend more than 1m beyond the lower crossbeam, with the excess portion reserved as a construction work platform. The bottom formwork is fully laid on the secondary beam, with its width and length matching the dimensions of the lower crossbeam. The bottom formwork is then secured using nails or similar methods. After the bottom formwork (7) is laid, the reinforcing bars and side formwork for the adjacent double lower crossbeams are installed, and concrete is poured. Once the concrete strength meets the design requirements, the side formwork and bottom formwork support system are removed.

[0045] When dismantling the bottom formwork support system, first loosen the high-strength bolts of the steel clamps to lower it to a certain height, thus allowing the bottom formwork support system to detach from the bottom of the lower crossbeam. Then, dismantle the bottom formwork, secondary beams, longitudinal beam support main beams, transverse support main beams, steel clamps, and round steel lifting bars in sequence from top to bottom, completing the construction of the double lower crossbeams of the high-pile wharf. This cast-in-place formwork support system has a simple structure, high strength, high rigidity, and good safety. It is convenient to install and dismantle, and can construct both lower crossbeams at once, resulting in high construction efficiency.

[0046] The core solution of this utility model is:

[0047] A cast-in-place formwork support device for double lower crossbeams of a high-pile wharf includes steel clamps, round steel lifting bars, transverse support main beams, longitudinal support main beams, secondary beams, and bottom formwork. The steel clamps are installed on PHC pipe piles, tightly attached to the pile foundation. The round steel lifting bars are installed on the leading steel pipe piles, suspending the transverse support main beams. The two ends of the transverse support main beams are suspended by round steel lifting bars on the leading steel pipe piles of two adjacent frames. The front end of the longitudinal support main beam is installed on the transverse support main beam, and the remaining part is installed on top of the steel clamps. The secondary beams are installed at equal intervals on the longitudinal support main beams, and the bottom formwork is fully laid on the secondary beams, forming a cast-in-place formwork support system for double lower crossbeams.

[0048] This utility model has the following functions:

[0049] 1. The construction of two lower crossbeams can be completed in one go, resulting in high construction efficiency.

[0050] 2. The entire formwork support system is easy to manufacture, install, and dismantle, and has low construction costs.

[0051] 3. Select steel clamp support or round steel hanger for reverse suspension according to the different diameter of the pile foundation. Steel clamp support is used for piles with conventional diameter. For small diameter steel pipe piles that are not common, round steel hanger is used for reverse suspension to save the cost of making additional steel clamps.

[0052] The beneficial effects of this utility model are as follows: Compared with the prior art, the cast-in-place formwork support device for the double lower crossbeams of the high-pile wharf, comprising steel clamps, round steel lifting bars, transverse support main beams, longitudinal support main beams, secondary beams, and bottom formwork, is simple to manufacture, has high overall strength, high rigidity, and good safety. The steel clamps are connected by high-strength bolts, the support main beams are lapped and fixed, the secondary beams are bundled and fixed, and the bottom formwork is fixed with iron nails. The support system is simple and convenient to install and dismantle, and can complete the double lower crossbeams in one go, saving construction costs and increasing construction efficiency.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model without departing from the spirit and scope of this utility model. Any modifications or equivalent substitutions should be covered within the protection scope of the claims of this utility model.

Claims

1. A cast-in-place formwork support device for double-span lower crossbeams of a high-pile wharf, characterized in that, include: Round steel hangers, steel clamps, transverse support main beams, longitudinal support main beams and leading steel pipe piles; The round steel lifting bars are hung on the first leading steel pipe piles of the two adjacent frames of the high-pile wharf, and the transverse support main beam is suspended in reverse. Specifically, the two ends of the transverse support main beam are suspended in reverse by the round steel lifting bars on the leading steel pipe piles of the two adjacent frames. The front end of the longitudinal support beam is installed on the transverse support beam, and the rest of the longitudinal support beam is installed on the top of the steel clamp.

2. The cast-in-place formwork support device for the double lower crossbeams of a high-pile wharf according to claim 1, characterized in that, The round steel suspension bar consists of three round steel bars, which are evenly arranged on the first leading steel pipe pile. The two ends of the round steel suspension bar pass through the transverse support main beam and are welded and fixed.

3. The cast-in-place formwork support device for the double lower crossbeams of a high-pile wharf according to claim 2, characterized in that, The steel clamps are fixed to the PHC pipe piles with high-strength bolts.

4. The cast-in-place formwork support device for the double lower crossbeams of a high-pile wharf according to claim 3, characterized in that, The top of the steel clamp is equipped with longitudinally supporting double main beams and longitudinally supporting main beams.

5. The cast-in-place formwork support device for the double lower crossbeams of a high-pile wharf according to claim 4, characterized in that, The front end of the longitudinally supported double-span main beam is installed on the transversely supported main beam, and the rear end of the longitudinally supported double-span main beam is installed on the top of the steel clamp.

6. The cast-in-place formwork support device for the double lower crossbeams of a high-pile wharf according to claim 5, characterized in that, The longitudinally supported double-span main beams are connected to the longitudinally supported main beams to form a whole.

7. The cast-in-place formwork support device for the double lower crossbeams of a high-pile wharf according to claim 6, characterized in that, The secondary beam consists of the secondary beam body and the fixed beam; the secondary beam body is installed at equal intervals on the longitudinally supported double-span main beam and the longitudinally supported main beam, and a continuous fixed beam is arranged at each end of the secondary beam body.

8. The cast-in-place formwork support device for the double lower crossbeams of a high-pile wharf according to claim 7, characterized in that, The wharf's pile foundation consists of front steel pipe piles, steel columns, and PHC pipe piles arranged in a row.

9. The cast-in-place formwork support device for the double lower crossbeams of a high-pile wharf according to claim 8, characterized in that, During the installation of the cast-in-place formwork support device for the double lower crossbeams of the high-pile wharf, steel clamps were installed on the PHC pipe piles, and round steel lifting bars were installed on the front steel pipe piles. The round steel lifting bars were evenly hung on the front steel pipe piles to support the transverse main beam. The steel clamps were installed on the top of the longitudinal main beam, and the front end of the longitudinal main beam was installed on the transverse main beam. The secondary beam body was installed at equal intervals on the longitudinal main beam and tied and fixed. A continuous fixed beam was arranged at each end of the secondary beam body. The secondary beam body and the fixed beam formed the secondary beam. The bottom formwork was fully laid on the secondary beam and fixed with iron nails. After the bottom formwork was laid, the steel bars and side formwork of the adjacent double lower crossbeams were installed, and concrete was poured.

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