Supporting structure for cantilever beam plates on two sides of middle partition wall of deep foundation pit

Abstract

The utility model discloses a supporting structure for cantilever beam plates on two sides of a middle partition wall of a deep foundation pit, which relates to the technical field of supporting structures for cantilever beam plates on two sides of a middle partition wall of a deep foundation pit, and adopts the technical scheme that the supporting structure comprises a foundation slab arranged on a cantilever beam plate on one side of the middle partition wall, and prefabricated embedded parts and I-shaped steel on a top plate of the foundation slab; the prefabricated embedded part comprises a steel supporting plate, four steel bars are welded to the four corners of the steel supporting plate, and four connectors are welded to the four corners of the steel supporting plate. Compared with the prior art, the structure has the advantages that a stable supporting point is provided for the cantilever beam plate through the prefabricated embedded part and the I-shaped steel supporting structure, structural deformation or damage caused by the dead weight of the cantilever beam plate and external loads is effectively prevented, connection is reliable, the structure of the cantilever beam plate is effectively protected, and the service life of the cantilever beam plate is prolonged. And the safety in the construction process and the stability of the structure are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of support structures for cantilever beam-slab on both sides of the middle partition wall in deep foundation pits, and particularly relates to a support structure for cantilever beam-slab on both sides of the middle partition wall in deep foundation pits. Background Technique

[0002] Deep foundation pit engineering plays an increasingly important role in modern urbanization construction, especially in soft soil areas. With the continuous development and utilization of urban underground space, the construction technology of deep foundation pits is also constantly progressing. Traditional deep foundation pit construction methods mainly include two ways: full excavation and sectional excavation. Although full excavation construction is simple, it has a greater impact on the surrounding environment and a longer construction period. Sectional excavation divides the large foundation pit into several small foundation pits by setting a middle partition wall in the foundation pit and excavates them in stages, thereby reducing the impact on the surrounding environment and shortening the construction period. However, during the implementation of sectional excavation, due to the non-through basement main body on the side of the middle partition wall in the previously excavated foundation pit area, the situation of beam-slab disconnection and cantilever often occurs. The support problem of such cantilever beam-slab has always been a technical problem in deep foundation pit construction.

[0003] In the existing deep foundation pit construction, the technical means to solve the support problem of cantilever beam-slab mainly include the support of disc buckle formwork and the support of temporarily cast reinforced concrete structural columns. Although the support of disc buckle formwork can provide the necessary support force, it occupies a large space, limits the operation space of mechanical equipment, and is not conducive to the demolition of the middle partition wall and the construction of the secondary structure of the basement. In addition, the demolition and re-erection of the disc buckle formwork also increase the complexity and cost of construction. While the reinforced concrete structural column can provide relatively stable support, it needs to be demolished later, which not only increases the construction difficulty but also causes unnecessary economic losses.

[0004] When the existing technical means are used to solve the support problem of cantilever beam-slab, the following main deficiencies exist:

[0005] Space occupation problem: The support of disc buckle formwork needs to occupy a large space, which limits the flexibility of the construction operation surface and the operation space of mechanical equipment.

[0006] Construction efficiency problem: The process of erecting and demolishing the disc buckle formwork is cumbersome, increasing the construction period and affecting the project progress.

[0007] Economy problem: The demolition of the reinforced concrete structural column not only increases the construction cost but also generates construction waste, which is not conducive to environmental protection.

[0008] Structural stability problem: When the existing technology supports the cantilever beam-slab, it is often difficult to ensure the long-term stability of the structure. Especially in soft soil areas, the instability of the foundation will further increase the construction risk.

[0009] The existence of these problems makes it difficult for the existing technology to achieve an ideal effect when solving the support problem of cantilevered beam-slab structures. Especially in soft soil areas, the instability of the foundation makes the support problem of cantilevered beam-slab structures more prominent, and the existing support methods are difficult to meet the construction requirements.

[0010] The utility model aims to solve the support problem of cantilevered beam-slab structures on both sides of the middle partition wall in deep foundation pits. The support of cantilevered beam-slab structures not only needs to provide sufficient strength and stability to ensure construction safety and structural safety, but also needs to consider the convenience and economy of construction. The deficiencies of the existing technical means in these aspects often lead to problems such as low efficiency, increased costs, and great construction difficulty during the construction process. Therefore, there is an urgent need for a new support structure that can not only provide reliable support, but also reduce the occupation of construction space, improve construction efficiency, and reduce economic costs. The utility model precisely aims at these problems and proposes a new support structure for cantilevered beam-slab structures on both sides of the middle partition wall in deep foundation pits, with the expectation of improving construction efficiency and reducing economic costs while ensuring construction safety and structural safety. Summary of the Utility Model

[0011] In order to achieve the above-mentioned utility model purpose and address the above-mentioned technical problems, the utility model provides a support structure for cantilevered beam-slab structures on both sides of the middle partition wall in deep foundation pits.

[0012] Its technical solution is as follows: it includes a foundation slab, precast embedded parts, and I-beams on the cantilevered beam-slab structure on one side of the middle partition wall and the top slab of this layer;

[0013] The precast embedded parts include steel bearing plates, 4 steel bars are welded at the four corners of the steel bearing plates, and 4 couplers are welded at the four corners;

[0014] During the construction of the main structure, a disc buckle scaffold is erected on the foundation slab.

[0015] The steel bearing plate of the precast embedded part is 20 mm thick, and the diameter of the steel bars is 16 mm.

[0016] Both the bottom and top of the I-beam are welded with steel bearing plates to the I-beam, and 2 corner strengthening steel plates are welded on each side at the connection between the flange of the I-beam and the steel bearing plate.

[0017] 4 reserved holes are opened at the four corners of the steel bearing plate. The steel bearing plates at both ends of the I-beam are aligned with the precast embedded parts, and bolt connections are made through the reserved holes and reserved couplers.

[0018] The steel bearing plates at the bottom and top of the I-beam are 20 mm thick, and the thickness of the corner strengthening steel plates is 6 mm.

[0019] Ear plates are welded at the edge of the flange of each section of the I-beam. The thickness of the ear plates is 6 mm, and 2 through holes are opened on each ear plate. After assembling the I-beams, the ear plates are connected with butt joint plates with a thickness of 6 mm and high-strength bolts.

[0020] This utility model patent includes precast embedded parts and I-beam supports. The precast embedded parts are embedded in the bottom and top floor beams and slabs of this layer.

[0021] The I-beam is in two sections, with ear plates welded in the middle part, and butt splints are used and connected with high-strength bolts.

[0022] Steel bearing plates are welded on the I-beam and are connected to the precast embedded parts with bolts.

[0023] Replace the support of the disc buckle scaffold with an I-beam support, and the entire disc buckle scaffold can be removed.

[0024] The beneficial effects brought by the technical solution provided by the embodiment of this utility model are as follows:

[0025] (1) Support the cantilever part: Through the precast embedded parts and the I-beam support structure, this solution provides a stable support point for the cantilever beam and slab, effectively preventing structural deformation or damage caused by the self-weight of the cantilever beam and slab and external loads. The connection is reliable, effectively protecting the cantilever beam and slab structure, and ensuring the safety during construction and the stability of the structure.

[0026] (2) Increase the mechanical demolition space of the middle partition wall in the basement: By using the support structure in this solution, the space occupied by the traditional support system can be reduced, thereby providing a larger operating space for the mechanical demolition of the middle partition wall, improving the construction efficiency and flexibility.

[0027] (3) More economical and cost-saving: Compared with the traditional support system, the precast embedded parts and the I-beam support structure adopted in this solution have lower material costs and construction costs. At the same time, due to its recyclable characteristics, the long-term economic investment is reduced, achieving cost savings.

[0028] (4) Simple structure and small space occupation: The design of this solution simplifies the complexity of the support structure, reduces the difficulty and time of on-site construction. At the same time, due to the compactness of the structure, the occupation of the construction space is reduced, providing convenience for other construction operations.

[0029] (5) Facilitate the demolition of the middle partition wall: The fast installation and demolition characteristics of the support structure make the demolition work of the middle partition wall more convenient, reduce the potential damage to the surrounding structure during the demolition process, and speed up the construction progress.

[0030] (6) Reliable connection and formation of a support system: The bolt connection method between the precast embedded parts and the I-beam provides a reliable mechanical connection, ensuring the stability and reliability of the entire support system, and effectively protecting the cantilever beam and slab structure.

[0031] (7) Economical and environmentally friendly, and can be reused: The materials in this solution are all recyclable materials. After the support structure is demolished, it can be cleaned and maintained and reused for other projects, reducing resource waste and conforming to the construction concept of environmental protection.

[0032] In summary, this solution not only has innovation in technology, but also shows significant advantages in economy and environmental protection, and can provide a more efficient, safe and economical construction plan for construction projects. Description of the Drawings

[0033] Figure 1 It is the front view and side view of the precast embedded parts in the embodiment of the present utility model.

[0034] Figure 2 It is the front view of the I-beam in the embodiment of the present utility model.

[0035] Figure 3 It is the top view of the I-beam in the embodiment of the present utility model.

[0036] Figure 4 It is a schematic diagram of setting up the disc buckle scaffold during the construction of the main structure in the embodiment of the present utility model.

[0037] Figure 5 It is a schematic diagram of placing the I-beam support during the construction of the main structure in the embodiment of the present utility model.

[0038] Figure 6 It is a schematic diagram of demolishing the disc buckle scaffold during the construction of the main structure in the embodiment of the present utility model.

[0039] Among them, the reference numerals are: 7, middle partition wall; 8, foundation floor slab; 9, top slab; 1, precast embedded part; 2, I-beam; 3, steel support plate; 101, steel bar; 102, coupler; 10, disc buckle scaffold; 4, corner strengthening steel plate; 301, reserved hole; 5, ear plate; 501, through hole; 6, docking splint. Detailed Embodiment

[0040] In order to make the purpose, technical solution and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. Of course, the specific embodiments described here are only used to explain the present utility model and are not used to limit the present utility model.

[0041] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0042] In the description of the creation of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the creation of the present utility model 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. Therefore, it should not be construed as a limitation to the creation of the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the creation of the present utility model, unless otherwise stated, the meaning of "a plurality" is two or more.

[0043] In the description of the creation of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the creation of the present utility model can be understood through specific circumstances.

[0044] Embodiment 1

[0045] See Figures 1 to 6 , the present utility model provides a support structure for cantilever beam slabs on both sides of the middle partition wall in a deep foundation pit, including a foundation slab 8 of the cantilever beam slab on one side of the middle partition wall 7 and precast embedded parts 1 and I-beams 2 on the top slab 9 of this layer;

[0046] The precast embedded part 1 includes a steel support plate 3, and 4 steel bars 101 are welded at the four corners of the steel support plate 3, and 4 couplers 102 are welded at the four corners;

[0047] During the construction of the main structure, a disc buckle scaffold 10 is erected on the foundation slab 8.

[0048] The steel support plate 3 of the precast embedded part 1 is 20 mm thick, and the steel bars 101 have a diameter of 16 mm.

[0049] Both the bottom and the top of the I-beam 2 are welded to the I-beam 2 using steel support plates 3, and 2 corner reinforcement steel plates 4 are welded on each side at the connection between the flange of the I-beam 2 and the steel support plate 3.

[0050] Four reserved holes 301 are opened at the four corners of the steel bearing plate 3. The steel bearing plates 3 at both ends of the I-beam 2 are aligned with the precast embedded parts 1, and bolt connections are made through the reserved holes 301 and the reserved connectors 102.

[0051] The steel bearing plates 3 at the bottom and top of the I-beam 2 are 20 mm thick, and the corner reinforcement steel plates 4 are 6 mm thick.

[0052] Lugs 5 are welded to the edges of the flanges of each section of the I-beam 2. The lugs 5 are 6 mm thick, and two through holes 501 are opened in each lug 5. After assembling the I-beams 2, the lugs 5 are connected by butt splints 6 with a thickness of 6 mm and high-strength bolts.

[0053] The utility model patent includes a precast embedded part 1 and an I-beam 2 support. The precast embedded part 1 is pre-embedded in the bottom and top floor beams and slabs of this layer.

[0054] The I-beam 2 is in two sections, with lugs 5 welded in the middle part, and connected by butt splints 6 with high-strength bolts.

[0055] The I-beam 2 is welded with a steel bearing plate 3 and bolt-connected to the precast embedded part 1.

[0056] Replace the support of the disk buckle frame 10 with the support of the I-beam 2, and the disk buckle frame 10 can be completely removed.

[0057] During the construction of the main structure, such as Figure 3 , place the precast embedded part 1 at the corresponding position on the steel bars of the foundation slab 8 or the floor slab 8 of this layer, and then pour concrete; set out and position the disk buckle frame 10 on the foundation slab 8, and set up the formwork of the lower support of the precast embedded part 1 separately. Set the precast embedded part 1 at the corresponding position on the top slab 9 of this layer, and then pour concrete, so as to set the precast embedded part 1 in the beam and slab.

[0058] Before removing the disk buckle frame 10 in the basement, first remove the formwork of the lower support of the precast embedded part 1 pre-embedded in the corresponding position, do not process the formwork of the support in other positions, and perform a series of treatments such as cleaning and rust removal on the surface of the precast embedded part 1.

[0059] Such as Figure 4 , place the I-beam 2 support at the middle position between the top slab 9 and the bottom slab 8. Align the lower steel bearing plate 3 of the I-beam 2 support with the precast embedded part 1 on the floor slab 8 of the floor, and fixedly connect the other steel bearing plate 3 with the precast embedded part 1 on the top slab 9. The I-beam support is connected in two sections with a No. 16 I-beam. Lugs 5 are welded to the edges of the flanges of each section of the I-beam 2. The lugs 5 are 6 mm thick, and two through holes 501 are opened in each lug 5. After assembling the I-beams 2, the lugs 5 are connected by butt splints 6 with a thickness of 6 mm and high-strength bolts;

[0060] Such as Figure 5, the disk button scaffold 10 can be completely demolished. After placing the I-beam 2 in the floor to form a vertical force transmission support, it plays a protective role for the cantilever slabs on both sides of the middle partition wall 7. It creates a construction operation surface for the demolition of the middle partition wall 7. Mechanical equipment can demolish the middle partition wall 7. After the demolition, the basement structure is rebuilt. After the cast-in-place concrete reaches the design strength, the I-beam 2 structure can be demolished. After the bolts of the I-beam 2 support are removed, it can be demolished layer by layer. The demolished I-beam 2 support can be recycled, which is green and environmentally friendly, saves construction costs, and provides an operation space for the demolition of the middle partition wall 7.

[0061] Embodiment 2

[0062] Based on Embodiment 1, it is not limited to the beam-slab at the middle partition wall 7 and can be used for multiple cantilever beam-slab structures.

[0063] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A cantilevered beam-slab support structure on both sides of the partition wall in a deep foundation pit, characterized in that: It comprises a prefabricated embedded part (1) and an I-beam (2) arranged on a base bottom plate (8) of a cantilevered beam plate on one side of a middle partition wall (7) and a top plate (9) of the layer; The prefabricated embedded part (1) comprises a steel support plate (3), four steel bars (101) are welded at the four corners of the steel support plate (3), and four connectors (102) are welded at the four corners; During the construction of the main structure, a buckle frame (10) is set up on the foundation bottom plate (8).

2. The cantilevered beam-slab support structure on both sides of the partition wall in the deep foundation pit according to claim 1 is characterized in that: The steel support plate (3) of the prefabricated embedded part (1) is 20 mm thick, and the steel bar (101) has a diameter of 16 mm.

3. The cantilevered beam-slab support structure on both sides of the partition wall in the deep foundation pit according to claim 1 is characterized in that: The bottom and top of the I-beam (2) are both welded to the I-beam (2) by a steel support plate (3), and two corner reinforcement steel plates (4) are welded on each side of the connection between the wing plate of the I-beam (2) and the steel support plate (3).

4. The cantilevered beam-slab support structure on both sides of the partition wall in the deep foundation pit according to claim 3 is characterized in that: Four reserved holes (301) are provided at the four corners of the steel support plate (3); the steel support plates (3) at both ends of the I-beam (2) are aligned with the prefabricated embedded parts (1) and are bolted together through the reserved holes (301) and the reserved connectors (102).

5. The cantilevered beam-slab support structure on both sides of the partition wall in the deep foundation pit according to claim 4 is characterized in that: The steel support plates (3) at the bottom and top of the I-beam (2) are 20 mm thick, and the corner reinforcement steel plates (4) are 6 mm thick.

6. The cantilevered beam-slab support structure on both sides of the partition wall in the deep foundation pit according to claim 3 is characterized in that: The edge of the wing plate of each section of I-beam (2) is welded with an ear plate (5), the ear plate (5) is 6 mm thick, and each ear plate (5) is provided with two through holes (501). After assembling the I-beam (2), the ear plates (5) are connected by a 6 mm thick butt clamp (6) and high-strength bolts.

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