Multifunctional truss structure suitable for bearing platform construction and construction method

Abstract

The invention discloses a multifunctional truss structure suitable for bearing platform construction and a construction method. The multifunctional truss structure comprises suspended beams, outriggers, suspenders, stiffening plates and cushion blocks. The stiffening plate is arranged on the inner side of the wall body of the steel suspension box and is used for placing the suspended beam; the cushion block is arranged between the stiffening plate and the steel casing; the outrigger is placed on the suspended beam and is used for fixing the suspender; the hanging rod is located between the cantilever beam and the steel hanging box bottom plate main beam and used for transmitting the load of the bottom sealing concrete on the bottom plate to the steel pile casing. Through overall hoisting of the steel hoisting box and the multifunctional truss structure, the construction amount and the steel using amount are reduced, the construction progress is accelerated, and the construction precision is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pedestal construction, and more specifically, to a multifunctional truss structure and a construction method suitable for pedestal construction. Background Art

[0002] The steel hanging box serves as a water retaining and formwork structure during the construction of the foundation. It is usually composed of a wall, a bottom plate, an internal support, a tie rod, a cantilever beam, a hanging leg, a guide and other structures. Usually, an internal support is set inside the steel hanging box to support the wall so that the structural force of the steel hanging box meets the requirements under horizontal loads such as hydrostatic pressure; hanging legs are set on the inner wall plate of the steel hanging box. When the steel hanging box is lowered into place, the hanging legs are placed on the steel casing to limit the vertical position of the steel hanging box; before pouring the bottom concrete, a tie rod needs to be installed to connect the bottom plate with the steel casing, and the bottom concrete load is transferred to the steel casing by the tie rod; in order to ensure the plane position and accuracy requirements when the steel hanging box is lowered into place, a guide device needs to be set to limit the steel hanging box. In traditional structures and construction methods, the tie rod (hanging rod) is installed after the steel hanging box is lowered into place. It is necessary to weld the support on the steel casing and then install the hanging rod on site, which has the problem of occupying key lines and requiring divers to work underwater. In addition, the lower support of the traditional tie rod is too close to the bottom plate opening, which affects the installation of the blocking plate; the structural classification design of internal supports, cantilever beams, hanging legs, guides, etc. requires a large amount of steel. Summary of the invention

[0003] The purpose of the present invention is to provide a multifunctional truss structure and a construction method suitable for foundation construction, which reduces the construction workload and steel consumption, speeds up the construction progress and improves the construction accuracy through the overall lifting of the steel hanging box and the multifunctional truss structure.

[0004] The technical solution adopted by the present invention to solve this technical problem is: a multifunctional truss structure suitable for the construction of a cap, comprising: a hanging beam, a cantilever beam, a hanging rod, a stiffening plate, and a cushion block; The stiffening plate is arranged on the inner side of the steel hanging box wall to place the hanging beam; the pad is arranged between the stiffening plate and the steel casing; the cantilever beam is placed on the hanging beam to fix the hanging rod; the hanging rod is located between the cantilever beam and the main beam of the bottom plate of the steel hanging box to transfer the bottom concrete load on the bottom plate to the steel casing.

[0005] As a further solution of the present invention, the stiffening plate is an arc-shaped stiffening plate.

[0006] As a further solution of the present invention, the hanging beam is welded by steel sections; the hanging beam is a variable-section beam, and its side section height close to the steel hanging box wall is greater than the middle end section, that is, the middle section section of the hanging beam as a whole is small, and the end section of the hanging beam as a whole is large.

[0007] As a further solution of the present invention, the cushion block is welded between the stiffening plate and the steel casing.

[0008] The present invention also provides a construction method using a multifunctional truss structure suitable for foundation construction, comprising the following steps: Step 1: Weld the hanging beam, cantilever beam, suspender rod and stiffening plate of the multifunctional truss structure on the steel hanging box. The stiffening plate is an arc-shaped stiffening plate to adapt to the steel casing; Step 2: Lift and lower the steel hoisting box. During the lowering process, several arc-shaped stiffening plates of the multifunctional truss structure are opposite to the corresponding steel casings, and the arc-shaped stiffening plates play a guiding role; Step 3: The steel hanging box is lowered into place, and the multifunctional truss is placed on the steel casing; Step 4: Use pads to fill the gap between the arc section of the stiffening plate and the steel casing, and weld them securely with steel plates.

[0009] As a further solution of the present invention, the following steps are also included: Step 5: Install the blocking plate on the bottom plate of the steel hanging box and pour the bottom concrete; Step 6: After the bottom concrete reaches the strength, pump water to the top of the bottom, remove the hanger rods and cantilever beams, and retain the hanging beam structure. At this time, the hanging beam serves as the internal support of the top layer and supports the wall; Step 7: Cast the foundation and pier body.

[0010] The present invention has at least the following beneficial effects: 1) This multifunctional truss structure is an integrated structure of cantilever beams, hanging beams, hangers and stiffening plates, which are welded to the steel hanging box as a whole. During the lowering process, the stiffening plates can be used as guides for the lowering of the steel hanging box, and can be lowered and positioned at the same time; after the bottom concrete reaches the required strength, the hanging beams can also be used as the top internal support of the steel hanging box. This structure greatly saves the amount of steel.

[0011] 2) In the construction method of the present application, before the steel hanging box is lowered, the hanging rod is installed in advance, the upper support of the hanging rod is fixed on the cantilever beam, and the lower support of the hanging rod is fixed on the main beam of the base plate. The early installation of the hanging rod can reduce the workload on the construction site, save construction time, and is easy to operate.

[0012] 3) Based on the gap measured on site, a pad is placed between the arc-shaped stiffening plate and the steel casing. This not only limits the position of the steel hanging box, but also improves the stress.

[0013] 4) The hanger can be set at a place far away from the steel casing, avoiding the problem of interference between the lower support of the hanger and the blocking plate.

[0014] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic plan view of the multifunctional truss structure of an embodiment of the present application; Figure 2 This is a schematic elevation diagram of a multifunctional truss structure according to an embodiment of the present application; Figure 3 This is a schematic diagram of the local structure of the multifunctional truss structure of an embodiment of the present application.

[0016] Among them, 1- hanging beam, 2- cantilever beam, 3- hanger rod, 4- stiffening plate, 5- pad, 6- steel casing, 7- steel hanging box, 8- steel hanging box bottom plate main beam, 9- bottom sealing concrete, 10- pedestal. DETAILED DESCRIPTION

[0017] The present invention is described in detail and completely below in conjunction with the accompanying drawings. A person of ordinary skill in the art will be able to implement the present invention based on these descriptions. Before describing the present invention in conjunction with the accompanying drawings, it should be particularly pointed out that the technical solutions and technical features provided in each part of the present invention, including the following description, can be combined with each other without conflict.

[0018] In addition, the embodiments of the present invention involved in the following description are generally only a part of the embodiments of the present invention, rather than all the embodiments. Therefore, based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings and implementations, and its specific implementation process is as follows: like Figures 1 to 3 As shown, the present invention provides a multifunctional truss structure suitable for foundation construction, comprising: a hanging beam 1, a cantilever beam 2, a hanging rod 3, a stiffening plate 4, and a cushion block 5; The stiffening plate 4 is arranged on the inner side of the wall of the steel hanging box 7, and is used to place the hanging beam 1; the pad 5 is arranged between the stiffening plate 4 and the steel casing 6; the cantilever beam 2 is placed on the hanging beam 1, and is used to fix the hanging rod 3; the hanging rod 3 is located between the cantilever beam 2 and the main beam of the bottom plate of the steel hanging box 7, and is used to transfer the bottom concrete load on the bottom plate to the steel casing 6.

[0020] In the above technical solution, an arc-shaped stiffening plate 4 is arranged near the lower side of the wall of the steel hanging box 7 as the hanging leg of the hanging beam 1. The stiffening plate 4 is a force-bearing member of the hanging beam 1. During the lowering process of the steel hanging box 7, the stiffening plate 4 and the steel casing 6 can also play a guiding role. The cantilever beam 2 is placed on the hanging beam 1 to fix the hanging rod 3; the hanging rod 3 is located between the cantilever beam 2 and the main beam of the bottom plate of the steel hanging box 7, and is used to transfer the bottom concrete load on the bottom plate to the steel casing 6. The pad 5 is welded on site with steel plates to connect the arc-shaped stiffening plate 4 of the hanging beam 1 and the steel casing 6 to improve the force of the hanging beam 1.

[0021] The technical solution may also include the following technical details to better achieve the technical effect: the stiffening plate 4 is an arc-shaped stiffening plate 4 .

[0022] The present technical solution may also include the following technical details to better achieve the technical effect: the hanging beam 1 is made of welded steel sections; the hanging beam 1 is a variable-section beam, and its side section height close to the wall of the steel hanging box 7 is greater than the middle end section, that is, the middle section section of the hanging beam 1 as a whole is small, and the end section of the hanging beam 1 as a whole is large.

[0023] This technical solution may also include the following technical details to better achieve the technical effect: the pad 5 is welded between the stiffening plate 4 and the steel casing 6 .

[0024] The present invention also provides a construction method using a multifunctional truss structure suitable for foundation construction, comprising the following steps: Step 1: Weld the hanging beam 1, cantilever beam 2, suspender rod 3 and stiffening plate 4 of the multifunctional truss structure on the steel hanging box 7. Before the steel hanging box 7 is lowered, the suspender rod 3 is installed in advance, the upper support of the suspender rod 3 is fixed on the cantilever beam 2, and the lower support of the suspender rod 3 is fixed on the main beam 8 of the bottom plate of the steel hanging box. The suspender rod can be set away from the steel casing to avoid the problem of interference between the lower support of the suspender rod and the blocking plate.

[0025] The stiffening plate 4 is an arc-shaped stiffening plate 4 to adapt to the steel casing 6. In this embodiment, the stiffening plate 4 is arranged along the inner wall of the steel hanging box 7 corresponding to the steel casing 6. The number of stiffening plates 4 can be adjusted according to the on-site conditions, so that the stiffening plate 4 has two functions, one is to support the hanging beam 1, and the other is to guide the steel hanging box 7 during the lowering process; Step 2: Lift and lower the steel hanging box 7, during which the arc-shaped stiffening plates 4 of the multifunctional truss structure and the corresponding steel casings 6 are relative to each other and guided; Step 3: The steel hanging box 7 is lowered into place, and the multifunctional truss is placed on the steel casing 6; Step 4: Use the spacer 5 to fill the gap between the arc section of the stiffening plate 4 and the steel casing 6, and weld them firmly with steel plates.

[0026] Step 5: Install the blocking plate on the bottom plate of the steel hanging box 7 and pour the bottom concrete 9; Step 6: After the bottom concrete reaches the strength, pump water to the top of the bottom, remove the hanger 3 and the cantilever beam 2, and retain the hanging beam 1 structure. At this time, the hanging beam 1 serves as the internal support of the top layer and supports the wall; Step 7: Casting the cap 10 and the pier body.

[0027] The construction method adopted in the present application adopts an overall lifting process. The hanger 3 is installed in place first, and there is no need to weld the corbels on the steel casing 6 to install the hanger 3. The multifunctional truss is fixed on the wall of the steel hanging box 7. The hanger 3 connects the bottom plate main beam and the multifunctional truss structure. After the steel hanging box 7 and the multifunctional truss structure are lowered into place, the multifunctional truss structure is placed on the steel casing 6, and the load of the steel hanging box 7 and the bottom concrete is transferred to the steel casing 6, avoiding the situation that the load of the steel hanging box 7 itself and the load of the bottom concrete are ultimately borne by the steel casing 6.

[0028] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the embodiments shown and described herein.

Claims

1. A multifunctional truss structure suitable for foundation construction, characterized in that: include: Hanging beams, cantilever beams, suspenders, stiffening plates, and pads; The stiffening plate is arranged on the inner side of the steel hanging box wall to place the hanging beam; the pad is arranged between the stiffening plate and the steel casing; the cantilever beam is placed on the hanging beam to fix the hanging rod; the hanging rod is located between the cantilever beam and the main beam of the bottom plate of the steel hanging box to transfer the bottom concrete load on the bottom plate to the steel casing.

2. The multifunctional truss structure suitable for platform construction according to claim 1, characterized in that: The stiffening plate is an arc-shaped stiffening plate.

3. The multifunctional truss structure suitable for foundation construction according to claim 1 or 2, characterized in that: The hanging beam is welded from section steel; the hanging beam is a variable-section beam, and the height of the side section close to the steel hanging box wall is greater than the middle end section.

4. The multifunctional truss structure suitable for platform construction according to claim 1, characterized in that: The pad is welded between the stiffening plate and the steel casing.

5. A construction method using the multifunctional truss structure suitable for cap construction as claimed in any one of claims 1 to 4, characterized in that: The following steps are involved: Step 1: Weld the hanging beam, cantilever beam, suspender rod and stiffening plate of the multifunctional truss structure on the steel hanging box. The stiffening plate is an arc-shaped stiffening plate to adapt to the steel casing; Step 2: Lift and lower the steel hoisting box. During the lowering process, several arc-shaped stiffening plates of the multifunctional truss structure are opposite to the corresponding steel casings, and the arc-shaped stiffening plates play a guiding role; Step 3: The steel hanging box is lowered into place, and the multifunctional truss is placed on the steel casing; Step 4: Use pads to fill the gap between the arc section of the stiffening plate and the steel casing, and weld them securely with steel plates.

6. The construction method according to claim 5, characterized in that: The following steps are also included: Step 5: Install the blocking plate on the bottom plate of the steel hanging box and pour the bottom concrete; Step 6: After the bottom concrete reaches the strength, pump water to the top of the bottom, remove the hanger and cantilever beam, and retain the hanging beam structure. At this time, the hanging beam serves as the internal support of the top layer and supports the wall; Step 7: Cast the foundation and pier body.

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