Construction device and construction method for cast-in-situ cantilever coping beam of low pier on sea

Abstract

The present invention discloses a construction device and method for a cantilever cast-in-place cap beam of a low offshore bridge pier, and relates to the technical field of cap beam construction. The construction device comprises: a first cross beam, a second cross beam, a hanger, a longitudinal beam, a support and a template; two first cross beams are arranged on the pedestal in parallel and at intervals along the longitudinal direction of the bridge, and both ends of each first cross beam extend to the outside of the pedestal, and a second cross beam is arranged below both ends of each first cross beam and on both sides of the pedestal, and the second cross beam is connected to the first cross beam through a plurality of hangers, and the hangers can adjust the distance between the second cross beam and the first cross beam; a plurality of longitudinal beams are arranged in parallel and at intervals along the transverse direction of the bridge, and both ends of each longitudinal beam are respectively arranged on two second cross beams along the longitudinal direction of the bridge; the longitudinal beam is provided with a support, and the support is provided with a template for forming the cap beam. The construction device of the present invention is easy to install and remove, and has low construction cost.

Description

Technical Field

[0001] The present invention relates to the technical field of bent cap construction, and particularly relates to a construction device and a construction method for a cast-in-place cantilever bent cap of a low pier in the sea. Background Art

[0002] A bent cap, also known as a coping beam, refers to a reinforced concrete or under-reinforced concrete cross beam provided at the top of a row of pile piers or bridge piers to support, distribute, and transfer the loads of the upper structure. Its main function is to support the upper structure of the bridge and transfer all loads to the lower structure. Due to the crucial role played by the bent cap in the bridge, the construction of the bent cap in the bridge is a key part of bridge construction.

[0003] In the existing bent cap construction technologies, the construction methods for cast-in-place bent caps include: full hall formwork support method, hoop method, pin rod method, steel pipe pile method, etc. For the cast-in-place bent cap of a low pier in the sea (pier height less than or equal to 0.5 m), due to the particularity of its construction conditions, the above-mentioned construction methods all have obvious defects: the full hall formwork support must have a good foundation and is not suitable for the construction of a cast-in-place cantilever bent cap in the sea; the hoop method and the pin rod method are mainly suitable for the construction of a cast-in-place cantilever bent cap of a high pier and are not suitable for the construction of a cast-in-place cantilever bent cap of a low pier in the sea; the steel pipe pile method has a long construction period, faces the problem of difficult removal of steel pipe piles in the later stage, is inconvenient to disassemble and is not economical. Summary of the Invention

[0004] An embodiment of the present invention provides a construction device and a construction method for a cast-in-place cantilever bent cap of a low pier in the sea to solve the technical problems in the related technologies that the construction device is not suitable for the construction of a cast-in-place cantilever bent cap in the sea, or the construction device is inconvenient to install and disassemble and has a high construction cost.

[0005] In a first aspect, a construction device for a cast-in-place cantilever bent cap of a low pier in the sea is provided, including:

[0006] Two first cross beams are arranged on the pile cap in parallel at intervals along the longitudinal direction of the bridge, and both ends of each first cross beam extend outside the pile cap. Second cross beams are provided on both sides of the pile cap and below both ends of each first cross beam. The second cross beam is connected to the first cross beam by a plurality of suspension rods, and the suspension rods can adjust the distance between the second cross beam and the first cross beam;

[0007] A plurality of longitudinal beams are arranged in parallel at intervals along the transverse direction of the bridge, and both ends of each longitudinal beam are respectively arranged on two second cross beams along the longitudinal direction of the bridge; a support member is provided on the longitudinal beam, and a formwork for forming the bent cap is provided on the support member.

[0008] In some embodiments, the suspension rod includes a screw rod and nuts provided at both ends of the screw rod. The two ends of the screw rod respectively pass through the first cross beam and the second cross beam, and the first cross beam and the second cross beam are connected by nuts.

[0009] In some embodiments, the second cross beams below both ends of the same first cross beam are symmetrically arranged on both sides of the bearing platform.

[0010] In some embodiments, one end of each second cross beam close to the bearing platform abuts against the bearing platform.

[0011] In some embodiments, one suspension rod is provided at each of the two ends and the middle of each second cross beam, and the distances from the suspension rods at both ends to the suspension rod in the middle are equal.

[0012] In some embodiments, the construction device further includes:

[0013] Four steel pipe piles, which are symmetrically arranged at the four corners of the bearing platform of the bridge pier, and every two steel pipe piles support one first cross beam.

[0014] In some embodiments, the support member is a triangular support truss, the triangular support truss is fixed on the longitudinal beam, the formwork includes a bottom formwork and side formworks arranged on both sides of the bottom formwork, the bottom formwork and the side formworks enclose a cavity for pouring the capping beam, and the bottom formwork and the side formworks are fixed on the triangular support truss.

[0015] In a second aspect, a construction method for a cast-in-situ capping beam with a cantilever of a low bridge pier on the sea is provided, including the following steps:

[0016] Arrange two first cross beams parallel to each other at intervals along the longitudinal direction of the bridge on the bearing platform. Both ends of each first cross beam extend outside the bearing platform, and arrange second cross beams parallel below both ends of each first cross beam. A plurality of suspension rods are arranged between the second cross beam and the first cross beam;

[0017] Arrange a plurality of longitudinal beams parallel to each other at intervals along the transverse direction of the bridge, and make both ends of each second cross beam be respectively arranged on two second cross beams along the longitudinal direction of the bridge. A support member is arranged on the longitudinal beam, a formwork is arranged on the support member, and the distance between the first cross beam and the second cross beam is adjusted by using the suspension rod so that the formwork reaches a preset position;

[0018] Pour concrete on the formwork. After the concrete solidifies to reach the preset strength to form the capping beam, use the suspension rod to lower the second cross beam to separate the formwork from the capping beam;

[0019] Remove the formwork, the support member, the longitudinal beam, the second cross beam, the suspension rod and the first cross beam.

[0020] In some embodiments, the suspension rod includes a screw rod and nuts provided at both ends of the screw rod. The two ends of the screw rod are respectively passed through the first cross beam and the second cross beam, and the first cross beam and the second cross beam are connected using the nuts, and the distance between the first cross beam and the second cross beam is adjusted by rotating the nuts so that the formwork reaches a preset position.

[0021] In some embodiments, one end of each second cross beam close to the bearing platform is abutted against the bearing platform.

[0022] The embodiment of the present invention provides a construction device and a construction method for a cast-in-place cantilever capping beam of a low pier at sea. By providing two first cross beams, each first cross beam spans across the bearing platform and both ends extend outside the bearing platform. Below both ends of each first cross beam and on both sides of the bearing platform, there are second cross beams. The second cross beams and the first cross beams are connected by a plurality of suspension rods, and the suspension rods can adjust the distance between the second cross beams and the first cross beams. A plurality of longitudinal beams are arranged on the second cross beams, support members are arranged on the longitudinal beams, and formworks for forming the capping beam are arranged on the support members. Before pouring concrete into the formwork, the suspension rods are adjusted to make the formwork stay in a suitable position. The entire construction device is convenient to install and use and is suitable for the construction of a cast-in-place cantilever capping beam at sea. When the capping beam in the formwork is formed, the suspension rods are adjusted to lower the second cross beams, longitudinal beams, support members, and formworks as a whole, and the formwork falls off from below the formed capping beam, and the form removal is also simple and convenient. The overall construction efficiency is high and the cost is low. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic structural diagram of the construction device for a cast-in-place cantilever capping beam of a low pier at sea provided by the embodiment of the present invention;

[0025] Figure 2 It is Figure 1 the sectional view of A-A of

[0026] Figure 3 It is Figure 1 the sectional view of B-B of

[0027] Figure 4 It is the top view of the steel pipe piles and the first cross beam assembled on the bearing platform provided by the embodiment of the present invention;

[0028] Figure 5 It is the flow chart of the construction method for a cast-in-place cantilever capping beam of a low pier at sea provided by the embodiment of the present invention;

[0029] In the figure: 1 is the first cross beam; 2 is the second cross beam; 3 is the suspension rod; 31 is the screw rod; 32 is the nut; 4 is the longitudinal beam; 5 is the support member; 6 is the formwork; 61 is the bottom formwork; 62 is the side formwork; 7 is the steel pipe pile. Specific implementation manner

[0030] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] The embodiments of the present invention provide a construction device for a cast-in-place cantilever capping beam of a low pier on the sea, which can solve the technical problems in the prior art that the construction device is not applicable to the construction of a cast-in-place cantilever capping beam on the sea, or the installation and disassembly of the construction device are inconvenient and the construction cost is high.

[0032] See Figure 1 As shown, a construction device for a cast-in-place cantilever capping beam of a low pier on the sea includes: a first cross beam 1, a second cross beam 2, a suspension rod 3, a longitudinal beam 4, a support member 5 and a formwork 6.

[0033] Two first cross beams 1 are arranged in parallel at intervals along the longitudinal direction of the bridge on the bearing platform, and both ends of each first cross beam 1 extend outside the bearing platform. Second cross beams 2 are provided on both sides of the bearing platform and below both ends of each first cross beam 1. The second cross beam 2 is connected to the first cross beam 1 by a plurality of suspension rods 3, and the suspension rod 3 can adjust the distance between the second cross beam 2 and the first cross beam 1.

[0034] A plurality of longitudinal beams 4 are arranged in parallel at intervals along the transverse direction of the bridge, and both ends of each longitudinal beam 4 are respectively arranged on two second cross beams 2 along the longitudinal direction of the bridge. Support members 5 are provided on the longitudinal beams 4, and formworks 6 for forming the capping beam are provided on the support members 5.

[0035] Compared with the prior art, in the construction device for the cast-in-place cantilever capping beam of a low pier at sea in the embodiment of the present invention, by arranging two first crossbeams 1, each first crossbeam 1 straddles the pile cap, and both ends extend to the outside of the pile cap. Below both ends of each first crossbeam 1 and on both sides of the pile cap, there are second crossbeams 2. The second crossbeams 2 and the first crossbeams 1 are connected by a plurality of suspension rods 3, and the suspension rods 3 can adjust the distance between the second crossbeams 2 and the first crossbeams 1. A plurality of longitudinal beams 4 are arranged on the second crossbeams 2, support members 5 are arranged on the longitudinal beams 4, and formwork 6 for forming the capping beam is arranged on the support members 5. Before pouring concrete into the formwork 6, adjust the suspension rods 3 to make the formwork 6 stay in a suitable position. The whole construction device is convenient to install and use, and is suitable for the construction of the cast-in-place cantilever capping beam at sea. When the capping beam in the formwork 6 is formed, adjust the suspension rods 3 to lower the second crossbeams 2, longitudinal beams 4, support members 5 and formwork 6 as a whole, and the formwork 6 falls off from below the formed capping beam, and the form removal is also simple and convenient. The overall construction efficiency is high and the cost is low.

[0036] As an optional implementation manner, referring to Figure 1 and Figure 3 shown, the suspension rod 3 includes a screw rod 31 and nuts 32 arranged at both ends of the screw rod 31. The two ends of the screw rod 31 respectively pass through the first crossbeam 1 and the second crossbeam 2, and the first crossbeam 1 and the second crossbeam 2 are connected by the nuts 32. By adjusting the nuts 32 at both ends of the screw rod 31, the distance between the first crossbeam 1 and the second crossbeam 2 can be quickly adjusted to adjust the position of the formwork 6. The structure is simple and easy to use. Preferably, the screw rod 31 is a precision rolled ribbed steel.

[0037] As an optional implementation manner, referring to Figure 1 shown, the second crossbeams 2 below both ends of the same first crossbeam 1 are symmetrically arranged on both sides of the pile cap, which is beneficial to the balanced force at both ends of the first crossbeam 1 and does not overturn to one side.

[0038] As an optional implementation manner, one end of each second crossbeam 2 close to the pile cap abuts against the pile cap, which can effectively utilize the supporting effect of the pile cap and also prevent large bending deformation of the first crossbeam 1 under the action of force.

[0039] As an optional implementation manner, referring to Figure 1 shown, each second crossbeam 2 is provided with a suspension rod 3 at both ends and in the middle, and the distances from the suspension rods 3 at both ends to the suspension rod 3 in the middle are equal. Equivalently, the same second crossbeam 2 is lifted by three suspension rods 3, and the suspension rods 3 are distributed along the length direction of the second crossbeam 2. The suspension rods 3 at both ends of the second crossbeam 2 are symmetrically arranged with respect to the suspension rod 3 in the middle of the second crossbeam 2, so that the second crossbeam 2 is in balanced force.

[0040] As an optional implementation manner, referring to Figure 1 、 Figure 2 and Figure 4As shown, the construction device further includes four steel pipe piles 7, which are symmetrically arranged at the four corners of the bearing platform of the bridge pier. Each two steel pipe piles 7 support a first cross beam 1. The steel pipe piles 7 can be adjusted and elevated to meet the construction requirements. At the same time, each two steel pipe piles 7 supporting a first cross beam 1 can ensure the force balance of the first cross beam 1. Specifically, the diameter of the steel pipe pile 75 is larger than the width of the first cross beam 1 to ensure that the steel pipe pile 7 can fully support the first cross beam 1.

[0041] As an alternative embodiment, refer to Figure 1 As shown, the support member 5 is a triangular support truss, which is fixed on the longitudinal beam 4. The formwork 6 includes a bottom formwork 61 and side formworks 62 arranged on both sides of the bottom formwork 61. The bottom formwork 61 and the side formworks 62 enclose a cavity for pouring the capping beam, and the bottom formwork 61 and the side formworks 62 are fixed on the triangular support truss. During actual construction, there are convex platforms on the bearing platform for supporting the formed capping beam, and through holes adapted to the convex platforms will be provided in the middle of the bottom formwork 61.

[0042] As an alternative embodiment, each first cross beam 1 and second cross beam 2 includes two H-shaped steels arranged side by side. The double H-shaped steels can ensure that the first cross beam 1 and the second cross beam 2 have sufficient support strength, and through holes are provided between the two H-shaped steels for installing the suspender 3.

[0043] Refer to Figure 5 As shown, the embodiment of the present invention also provides a construction method for a cast-in-situ capping beam with a cantilever of a low bridge pier at sea, including the following steps:

[0044] Step S1, two first cross beams 1 are arranged in parallel at intervals along the longitudinal direction of the bridge on the bearing platform. Both ends of each first cross beam 1 extend outside the bearing platform, and second cross beams 2 are arranged in parallel below both ends of each first cross beam 1. A plurality of suspenders 3 are arranged between the second cross beam 2 and the first cross beam 1.

[0045] Step S2, a plurality of longitudinal beams 4 are arranged in parallel at intervals along the transverse direction of the bridge, and both ends of each second cross beam 2 are respectively arranged on two second cross beams 2 along the longitudinal direction of the bridge. A support member 5 is arranged on the longitudinal beam 4, and a formwork 6 is arranged on the support member 5. The distance between the first cross beam 1 and the second cross beam 2 is adjusted by using the suspender 3 to make the formwork 6 reach the preset position.

[0046] Step S3, concrete is poured on the formwork 6. After the concrete solidifies to reach the preset strength to form the capping beam, the second cross beam 2 is lowered by using the suspender 3 to separate the formwork 6 from the capping beam.

[0047] Step S4, the formwork 6, the support member 5, the longitudinal beam 4, the second cross beam 2, the suspender 3 and the first cross beam 1 are removed.

[0048] Compared with the prior art, in the construction method of the cast-in-situ cantilever capping beam of low piers at sea in the embodiment of the present invention, by arranging two first crossbeams 1, each first crossbeam 1 spans across the pile cap, and both ends extend to the outside of the pile cap. Below both ends of each first crossbeam 1 and on both sides of the pile cap, there are second crossbeams 2. The second crossbeams 2 and the first crossbeams 1 are connected by a plurality of suspension rods 3, and the suspension rods 3 can adjust the distance between the second crossbeams 2 and the first crossbeams 1. A plurality of longitudinal beams 4 are arranged on the second crossbeams 2, support members 5 are arranged on the longitudinal beams 4, and formworks 6 for forming the capping beam are arranged on the support members 5. Before pouring concrete into the formworks 6, adjust the suspension rods 3 to make the formworks 6 stay in a suitable position. The entire construction device is convenient to install and use. When the capping beam is formed in the formworks 6, adjust the suspension rods 3 to lower the second crossbeams 2, longitudinal beams 4, support members 5 and formworks 6 as a whole, and the formworks 6 fall off from below the formed capping beam, and the form removal is also simple and convenient. The overall construction efficiency is high and the cost is low.

[0049] As an optional implementation manner, the suspension rod 3 includes a screw rod 31 and nuts 32 arranged at both ends of the screw rod 31. Pass the two ends of the screw rod 31 through the first crossbeam 1 and the second crossbeam 2 respectively, use the nuts 32 to connect the first crossbeam 1 and the second crossbeam 2, and adjust the distance between the first crossbeam 1 and the second crossbeam 2 by rotating the nuts 32 to make the formworks 6 reach the preset position. The structure is simple and convenient to use.

[0050] As an optional implementation manner, abut one end of each second crossbeam 2 close to the pile cap against the pile cap, which can effectively utilize the supporting effect of the pile cap and also prevent large bending deformation of the first crossbeam 1 under the action of force.

[0051] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" 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 of the present invention. Unless otherwise clearly specified and defined, the terms "installation", "connection" and "connection" 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 a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it 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 according to specific circumstances.

[0052] It should be noted that in the present invention, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0053] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features of the present invention disclosed herein.

Claims

1. A construction device for a cast-in-place cantilever capping beam of a low pier at sea, characterized in that Including: Two first cross beams (1), which are arranged in parallel at intervals along the longitudinal direction of the bridge on the bearing platform. Both ends of each first cross beam (1) extend outside the bearing platform. Below both ends of each first cross beam (1) and on both sides of the bearing platform, there are second cross beams (2). The second cross beams (2) are connected to the first cross beams (1) through a plurality of suspender bars (3), and the suspender bars (3) can adjust the distance between the second cross beams (2) and the first cross beams (1). Specifically, each suspender bar (3) includes a screw rod (31) and nuts (32) provided at both ends of the screw rod (31). Both ends of the screw rod (31) respectively penetrate through the first cross beam (1) and the second cross beam (2), and the first cross beam (1) and the second cross beam (2) are connected through the nuts (32). One end of each second cross beam (2) close to the bearing platform abuts against the bearing platform. A plurality of longitudinal beams (4), which are arranged in parallel at intervals along the transverse direction of the bridge, and both ends of each longitudinal beam (4) are respectively arranged on two second cross beams (2) along the longitudinal direction of the bridge; a support member (5) is provided on the longitudinal beam (4), and a formwork (6) for forming a capping beam is provided on the support member (5). One suspender bar (3) is provided at both ends and in the middle of each second cross beam (2), and the distances from the suspender bars (3) at both ends to the suspender bar (3) in the middle are equal. The second cross beams (2) below both ends of the same first cross beam (1) are symmetrically arranged on both sides of the bearing platform.

2. The construction device for the cast-in-place cantilever capping beam of a low pier at sea according to claim 1, characterized in that, Further including: Four steel pipe piles (7), which are symmetrically arranged at the four corners of the bearing platform of the bridge pier, and each two steel pipe piles (7) support one first cross beam (1).

3. The construction device for a cast-in-situ capping beam of a low bridge pier at sea according to claim 1, characterized in that: The support member (5) is a triangular support truss, the triangular support truss is fixed on the longitudinal beam (4), the formwork (6) includes a bottom formwork (61) and side formworks (62) arranged on both sides of the bottom formwork (61), the bottom formwork (61) and the side formworks (62) enclose a cavity for pouring the capping beam, and the bottom formwork (61) and the side formworks (62) are fixed on the triangular support truss.

Images