Prefabricated assembly type supporting beam

Abstract

The utility model discloses a prefabricated assembly type supporting beam which comprises a first steel plate, a second steel plate and an anchor piece, a force transmission steel cylinder is connected between the first steel plate and the second steel plate, the periphery of the force transmission steel cylinder is connected with a plurality of steel plate stiffening ribs, and a bolt hole is formed in the outer edge of the first steel plate; the anchor is fixedly connected to the side, away from the first steel plate, of the second steel plate. The two prefabricated assembly type supporting beams are symmetrical, the supporting beam on one side is a cast-in-place section embedded part, the supporting beam on the other side is a prefabricated section embedded part, a cast-in-place section reinforcement cage is arranged on the periphery of an anchor part of the cast-in-place section embedded part, and the anchor part of the prefabricated section embedded part is connected with prefabricated section concrete. The bolt holes of the cast-in-place section embedded part and the bolt holes of the prefabricated section embedded part are connected through high-strength bolts. The utility model relates to the technical field of deep foundation pit construction, and the precast section and the cast-in-place section are separated, so that the precast section of the support beam can be repeatedly used, and the use amount of concrete in the foundation pit construction process is reduced.

Description

Technical Field

[0001] This utility model relates to the field of deep foundation pit construction technology, and in particular to a prefabricated assembled support beam. Background Technology

[0002] In deep foundation pit engineering, diaphragm walls and support beams are common foundation pit support systems. Before large-scale excavation, the diaphragm walls are constructed first. As the excavation deepens, tunnel support beams, together with the diaphragm walls, form reliable foundation pit support, ensuring pit stability. After the underground foundation construction is completed, the support beams should be removed from bottom to top of the tunnel as the main structure construction progresses. For concrete support beams, static cutting combined with a jackhammer is typically used for removal. The removed supports are usually treated as construction waste and cannot be reused.

[0003] This patent introduces a prefabricated, removable concrete support beam structure system that can be reused in other foundation pits after dismantling, saving construction costs and reducing construction waste. Utility Model Content

[0004] The purpose of this utility model is to provide a prefabricated assembly support beam that separates the prefabricated section from the cast-in-place section. This allows the prefabricated support beam section to be reused, reducing the amount of concrete used during foundation pit construction and also reducing construction waste, thus improving the environmental friendliness and economy of the construction process.

[0005] This utility model is implemented as follows:

[0006] A prefabricated assembled support beam includes a first steel plate, a second steel plate, and an anchor. A force-transmitting steel cylinder is connected between the first and second steel plates. Multiple steel plate stiffening ribs are connected to the periphery of the force-transmitting steel cylinder. Bolt holes are provided on the outer edge of the first steel plate. The anchor is fixedly connected to the side of the second steel plate away from the first steel plate. Two prefabricated assembled support beams are symmetrically arranged. One support beam is a cast-in-place section embedded part, and the other support beam is a prefabricated section embedded part. A cast-in-place section reinforcement cage is provided around the anchor of the cast-in-place section embedded part. Prefabricated section concrete is connected to the anchor of the prefabricated section embedded part. The bolt holes of the cast-in-place section embedded part and the bolt holes of the prefabricated section embedded part are connected by high-strength bolts.

[0007] The first steel plate of a set of precast section embedded parts and the first steel plate of cast-in-place section embedded parts are equipped with clamps around their perimeters.

[0008] The clamp has connecting plates on both sides, and multiple connecting holes are provided on the connecting plates. Multiple sets of parallel precast section embedded parts and cast-in-place section embedded parts are connected by connecting bars. The two ends of the connecting bars are respectively inserted into the connecting holes of two adjacent sets of precast section embedded parts and cast-in-place section embedded parts.

[0009] The length and cross-sectional dimensions of the precast concrete section are designed according to the foundation pit conditions and retaining drawings.

[0010] Precast section embedded parts are provided at both ends of the precast section, and the two precast section embedded parts are respectively connected to the corresponding cast-in-place section embedded parts. The cast-in-place sections on both sides are respectively connected to the two sides of the diaphragm wall.

[0011] Compared with the prior art, this utility model has the following advantages:

[0012] 1. The prefabricated sections of the support beam in this utility model can be reused repeatedly, which reduces the amount of concrete used and the generation of construction waste, lowers construction costs, and conforms to the concept of green construction and sustainable development.

[0013] 2. This utility model effectively improves the structural stability of the support beam under tension and compression by adopting a double-layer steel plate structure combined with a force-transmitting steel cylinder and steel plate stiffening ribs, avoids the buckling problem of the embedded steel plate, and ensures the safety and reliability of the support beam under complex load conditions.

[0014] 3. This utility model adopts a combination of precast and cast-in-place sections for the support beam. The precast sections are manufactured in the factory, and only hoisting and connection are required on site, which reduces on-site construction time and improves construction efficiency.

[0015] 4. This utility model achieves effective connection between multiple sets of support beams through the design of clamps, connecting plates and connecting bars, which enhances the integrity and support strength of the concrete support beam structure system and further improves the structure's resistance to deformation and load-bearing capacity. Attached Figure Description

[0016] Figure 1 This is a three-dimensional drawing of the embedded parts in the prefabricated assembled support beam of this utility model;

[0017] Figure 2 This is a side view of the embedded parts in the prefabricated assembled support beam of this utility model;

[0018] Figure 3 This is a structural schematic diagram of the precast section and the cast-in-place section in this utility model;

[0019] Figure 4 This is a schematic diagram of the connecting ribs that strengthen the connection between multiple sets of support beams in this utility model.

[0020] In the figure, 1 is the first steel plate, 2 is the second steel plate, 3 is the steel plate stiffening rib, 4 is the force transmission steel cylinder, 5 is the bolt hole, 6 is the anchor, 7 is the high-strength bolt, 8 is the precast concrete section, 9 is the cast-in-place steel cage, 10 is the clamp, 11 is the connecting plate, 12 is the connecting hole, and 13 is the connecting bar. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] Please see the appendix Figure 1 and attached Figure 2 A prefabricated assembled support beam includes a first steel plate 1, a second steel plate 2 and an anchor 6. A force transmission steel cylinder 4 is connected between the first steel plate 1 and the second steel plate 2. A plurality of steel plate stiffening ribs 3 are connected to the periphery of the force transmission steel cylinder 4. The anchor 6 is fixedly connected to the side of the second steel plate 2 away from the first steel plate 1.

[0023] In the foundation pit retaining system, the support beams are compression members in most cases. However, due to the complex and uncertain nature of the soil load at the edge of the foundation pit, and based on the existing foundation pit monitoring data, a small portion of the support beams are subjected to tensile loads. To ensure that the embedded steel plates do not buckle under tension in the support beams, a double-layer steel plate structure of the first steel plate 1 and the second steel plate 2 is adopted, in combination with the force transmission steel cylinder 4 and the steel plate stiffening rib 3, to replace the ordinary steel plates as the plates in the embedded parts.

[0024] Please see the appendix Figure 1 To be continued Figure 3 During the construction process, based on the foundation pit conditions and retaining drawings, the length, cross-section and other dimensions of the precast concrete section 8 of the support beam were determined, and the precast support beam section was fabricated in the prefabrication site.

[0025] The precast beam segments are transported and hoisted to the designated location in the foundation pit. The bolt holes 5 of the cast-in-place segment embedded parts are fixedly connected to the bolt holes 5 of the precast segment embedded parts using high-strength bolts 7, thereby achieving a fixed connection between the precast and cast-in-place segments. This allows for the sequential connection of the cast-in-place segment reinforcement cage 9, the cast-in-place segment embedded parts, the precast segment embedded parts, and the precast segment. On-site formwork is then erected for the casting of the cast-in-place segment. Precast segment embedded parts are installed at both ends of the precast segment, and each of the two precast segment embedded parts is connected to a corresponding cast-in-place segment embedded part. The cast-in-place segments on both sides are connected to the two sides of the diaphragm wall.

[0026] For preferred options, please refer to the appendix. Figure 4 A set of precast section embedded parts and cast-in-place section embedded parts are provided with a clamp 10 around the first steel plate 1. The clamp 10 is provided with a connecting plate 11 on both sides. The connecting plate 11 is provided with a plurality of connecting holes 12. Multiple sets of parallel precast section embedded parts and cast-in-place section embedded parts are connected by connecting bars 13. The two ends of the connecting bars 13 are respectively inserted into the connecting holes 12 of two adjacent sets of precast section embedded parts and cast-in-place section embedded parts. The connection between multiple sets of parallel support beams is realized through the connecting bars 13, thereby strengthening the overall support strength of the concrete support beam structure system.

[0027] During dismantling, the high-strength bolts 7 connecting the precast section embedded parts and the cast-in-place section embedded parts are loosened to separate the precast and cast-in-place sections. The precast sections are then hoisted to a temporary storage area for reuse in other subsequent foundation pits. The cast-in-place sections are mechanically chiseled away to remove the support beams. This structural approach allows the precast support beam sections to be reused, reducing the amount of concrete used during foundation pit construction and also reducing construction waste, thus improving the environmental friendliness and economy of the construction process.

[0028] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the utility model. Therefore, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A pre-fabricated support beam, characterized by: This type of prefabricated assembled support beam includes a first steel plate (1), a second steel plate (2), and an anchor (6). A force transmission steel cylinder (4) is connected between the first steel plate (1) and the second steel plate (2). Multiple steel plate stiffening ribs (3) are connected around the force transmission steel cylinder (4). Bolt holes (5) are opened on the outer edge of the first steel plate (1). The anchor (6) is fixedly connected to the side of the second steel plate (2) away from the first steel plate (1). The two prefabricated assembled support beams are symmetrically arranged. One side of the support beam is a cast-in-place section embedded part, and the other side of the support beam is a prefabricated section embedded part. The anchor (6) of the cast-in-place section embedded part is surrounded by a cast-in-place section steel cage (9). Prefabricated section concrete (8) is connected to the anchor (6) of the prefabricated section embedded part. The bolt holes (5) of the cast-in-place section embedded part and the bolt holes (5) of the prefabricated section embedded part are connected by high-strength bolts (7).

2. The pre-fabricated support beam according to claim 1, characterized in that: A clamp (10) is provided around the first steel plate (1) of a set of precast section embedded parts and the first steel plate (1) of cast-in-place section embedded parts.

3. The pre-fabricated support beam according to claim 2, characterized in that: The clamp (10) has connecting plates (11) on both sides. Multiple connecting holes (12) are provided on the connecting plates (11). Multiple sets of parallel precast section embedded parts and cast-in-place section embedded parts are connected by connecting bars (13). The two ends of the connecting bars (13) are respectively inserted into the connecting holes (12) of the two adjacent sets of precast section embedded parts and cast-in-place section embedded parts.

4. The pre-fabricated support beam according to claim 1, characterized in that: The length and cross-sectional dimensions of the precast concrete section (8) are designed according to the foundation pit conditions and retaining drawings.

5. The pre-fabricated support beam according to claim 1, characterized in that: Precast section embedded parts are provided at both ends of the precast section, and the two precast section embedded parts are respectively connected to the corresponding cast-in-place section embedded parts. The cast-in-place sections on both sides are respectively connected to the two sides of the diaphragm wall.

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