Temporary stress structure of basement top plate

Abstract

The utility model provides a basement roof temporary stress structure which comprises a partition wall, existing support changing structures arranged on the edges of the two sides of the partition wall and new support changing structures placed in the partition wall, and the new support changing structures are connected with the existing support changing structures on the adjacent sides. According to the temporary stress structure of the basement top plate, the stress form of the basement top plate in the edge areas of the two sides of the partition wall is changed from full overhanging to fixing on one side and simply supporting on the other side, so that the basement top plate can bear large vertical loads in the edge areas of the partition wall, the stability of the partition wall is enhanced, and the service life of the partition wall is prolonged. The foundation pit supporting structure can stably and safely work cooperatively with the surrounding environment and the existing structure in the construction process, the influence on surrounding buildings and the geological environment is reduced, the construction safety is guaranteed, safety accidents such as foundation pit collapse are prevented, and the public safety of a construction area is maintained.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a temporary load-bearing structure for basement roof slabs. Background Technology

[0002] Currently, for large-scale land development, developers are constrained by factors such as funding and construction period, and generally divide the land into sections for phased development. For the development of underground space, partition walls are often used to achieve the function of each section. When the foundation pit is constructed using the open-cut method, the construction sequence during the basement backfilling stage is as follows: the basement structure of each section is constructed layer by layer upwards, the supporting structure is removed simultaneously, and replacement supports are installed. Finally, the horizontal forces of the basement structure between each section are transferred to the partition walls.

[0003] Please refer to Figure 1 Because newly constructed basement structures experience some settlement, a common method for replacing supports in the basement roof area involves placing a section of plain concrete between the structural beams of the roof slab and the partition wall. The support only extends to the edge of the partition wall, and the support structure is connected to the partition wall using simple rebar anchoring to prevent the basement's main structure settlement from affecting the enclosure structure. Figure 1 As shown, this results in a cantilever structure between the basement roof slab and the partition wall (forming a cantilever section). The structural body of the area where this cantilever structure is located cannot withstand large vertical loads, meaning it cannot be used for vehicle traffic or as a storage yard. When the area of ​​the foundation pit is small, it causes significant problems for site transportation organization during the later construction of the superstructure.

[0004] Therefore, how to improve the vertical load capacity of the cantilever section of the basement roof slab at the edge of the partition wall is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this utility model is to provide a temporary load-bearing structure for basement roof slabs to solve the problem that the cantilever section of the basement roof slab at the edge of the partition wall cannot withstand large vertical loads.

[0006] To solve the above-mentioned technical problems, this utility model provides a temporary load-bearing structure for basement roof slabs. The temporary load-bearing structure for basement roof slabs includes: a partition wall, an existing replacement support structure disposed on both sides of the partition wall, and a new replacement support structure placed inside the partition wall. The new replacement support structure is connected to the existing replacement support structure on the adjacent side.

[0007] Optionally, in the temporary load-bearing structure of the basement roof slab, the partition wall includes: a wall body and a groove formed at the top of the wall body, and the new support structure is disposed in the groove.

[0008] Optionally, the temporary load-bearing structure of the basement roof slab may further include: an EPS extruded polystyrene board, disposed on the surface of the bottom of the groove of the partition wall.

[0009] Optionally, in the temporary load-bearing structure of the basement roof slab, the thickness of the EPS extruded polystyrene board is 4cm.

[0010] Optionally, the temporary load-bearing structure of the basement roof slab may further include: an insulating membrane laid on the side wall surface of the groove of the partition wall.

[0011] Optionally, in the temporary load-bearing structure of the basement roof slab, the existing support structure includes: the existing roof slab and an existing structural beam disposed at the bottom of the existing roof slab.

[0012] Optionally, in the temporary load-bearing structure of the basement roof slab, the new support structure includes: a new roof slab and a new structural beam disposed at the bottom of the new roof slab, wherein the new roof slab is connected to the existing roof slab, and the new structural beam is connected to the existing structural beam.

[0013] Optionally, in the temporary load-bearing structure of the basement roof slab, the thickness of the new roof slab is equal to the thickness of the existing roof slab, and the thickness of the new structural beam is equal to the thickness of the existing structural beam.

[0014] Optionally, in the temporary load-bearing structure of the basement roof slab, the existing replacement support structure is connected to the partition wall by rebar installation, and the existing replacement support structure is connected to the new replacement support structure by rebar installation.

[0015] Optionally, the temporary load-bearing structure of the basement roof slab may also include: a rubber waterstop strip, which is installed on the upper and lower sides of the cross-section of the existing support structure.

[0016] In the temporary load-bearing structure for basement roof slabs provided by this utility model, the temporary load-bearing structure for basement roof slabs includes: a partition wall, existing replacement support structures disposed on both sides of the partition wall, and a new replacement support structure placed within the partition wall. The new replacement support structure is connected to the existing replacement support structure on the adjacent side. Based on the temporary load-bearing structure for basement roof slabs of this utility model, the stress form of the basement roof slab in the area on both sides of the partition wall is changed from being entirely cantilevered to being fixed on one side and simply supported on the other side. This allows the basement roof slab to withstand larger vertical loads in the area on the edge of the partition wall, enhancing the stability of the partition wall. It can ensure that during construction, the foundation pit support structure can work stably and safely in coordination with the surrounding environment and existing structures, reducing the impact on surrounding buildings and the geological environment, ensuring construction safety, preventing safety accidents such as foundation pit collapse, and maintaining public safety in the construction area.

[0017] On the other hand, by opening a groove at the top of the partition wall and setting up a new support structure, the existing support structure, which was originally set against the edge of the partition wall, is now extended into the groove of the partition wall, thereby increasing the vertical bearing capacity of the basement roof slab in the area of ​​the partition wall edge.

[0018] On the other hand, EPS extruded polystyrene board is installed on the surface of the bottom of the groove of the partition wall. Since EPS extruded polystyrene board is a lightweight and high-strength material, it can effectively reduce the negative impact of structural settlement on the partition wall.

[0019] On the other hand, an isolation film is laid on the side wall surface of the partition wall groove. Based on the good waterproofness and adaptability of the isolation film, it can effectively isolate moisture, reduce the erosion of the structure by water, and at the same time provide convenience for the seamless connection of the new and old structures. Attached Figure Description

[0020] The above and other objects, features and advantages of this disclosure will become more apparent from the accompanying drawings, in which like reference numerals generally denote like parts.

[0021] Figure 1 This is a structural diagram of the existing basement roof slab area after the replacement of the supports.

[0022] Figure 2 This is a schematic diagram of the temporary load-bearing structure of the basement roof slab in one embodiment of the present invention;

[0023] Figure 3 yes Figure 2 Cross-sectional view along the AA direction.

[0024] In the picture:

[0025] 1-Partition wall; 10-Wall body; 11-Groove; 2-Existing replacement support structure; 3-New replacement support structure; 4-EPS extruded polystyrene board; 5-Isolation film; 6-Reinforcing steel bar; 7-Rubber waterstop. Detailed Implementation

[0026] The temporary load-bearing structure for the basement roof slab proposed in this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of this utility model will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0027] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0028] In the description of the utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of a utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In utility models, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the utility model according to the specific circumstances.

[0031] Please refer to Figure 2 The temporary load-bearing structure of the basement roof includes: a partition wall 1, an existing replacement support structure 2 set on both sides of the partition wall 1, and a new replacement support structure 3 placed inside the partition wall 1. The new replacement support structure 3 is connected to the existing replacement support structure 2 on the adjacent side.

[0032] By temporarily connecting the permanent structure (i.e., the new support structure 3) to the partition wall 1, the stability of the partition wall 1 is enhanced. This ensures that during construction, the foundation pit support structure can work stably and safely with the surrounding environment and existing structures, reducing the impact on surrounding buildings and the geological environment, ensuring construction safety, preventing foundation pit collapses and other safety accidents, and maintaining public safety in the construction area. Furthermore, compared to existing methods that require reinforcement of the cantilever structure after support replacement to utilize the cantilever segment space, the connection method of this invention is simpler, more effective, and easier to construct.

[0033] Specifically, such as Figure 2As shown, the partition wall 1 includes a wall body 10 and a groove 11 formed at the top of the wall body 10, with the new support structure 3 disposed in the groove 11. The existing support structure 2 includes an existing roof slab and an existing structural beam disposed at the bottom of the existing roof slab; the new support structure 3 includes a new roof slab and a new structural beam disposed at the bottom of the new roof slab, the new roof slab being connected to the existing roof slab, and the new structural beam being connected to the existing structural beam. Specifically, the existing support structure 2 is connected to the partition wall 1 via rebar anchoring, and the existing support structure 2 is connected to the new support structure 3 via rebar anchoring. Specifically, the reinforcing bars 66 in the new support structure 3 should extend to the end face of the groove 11, and a first-level sleeve equal to 100% of the diameter of the reinforcing bar 6 should be reserved at the end of the longitudinal reinforcing bars 6 of the new structural beam. This reserved measure is to ensure a stable connection between the new structural beam and the existing structural beam, improving the overall load-bearing capacity and ductility of the structure.

[0034] The partition wall 1, also known as the diaphragm wall, is typically embedded deep in the soil to provide sufficient stability and prevent slippage at the base, while also being able to withstand significant vertical loads. A new support structure 3 (i.e., a new roof slab and a new structural beam) is placed in the partition wall 1 through a groove 11, slightly larger than the structural beam. This extends the support structure from the edge of the partition wall 1 into its interior, with the partition wall 1 below the groove 11 serving as a support point / temporary resting point for the new support structure 3. By using the partition wall 1 as a fulcrum, the stress distribution of the basement roof slab near the edge of the partition wall 1 is changed from entirely cantilevered to one side fixed and the other simply supported, solving the problem that the roof slab cannot withstand significant vertical loads near the partition wall 1. In other words, partition wall 1 in the temporary load-bearing structure of the basement roof slab not only serves to transmit horizontal forces but also bears vertical loads, significantly improving the vertical load-bearing capacity of the area between the basement roof slab and the edge of partition wall 1. This provides vehicle access and material storage space for the small excavation pit sections, significantly reducing the difficulty of site traffic organization and storage yard layout. At the same time, the basement structure itself also provides horizontal support for the top of partition wall 1, ensuring safety and stability during the excavation of other sub-excavations.

[0035] Preferably, the thickness of the new roof slab is equal to the thickness of the existing roof slab, and the thickness of the new structural beam is equal to the thickness of the existing structural beam.

[0036] Furthermore, the temporary load-bearing structure of the basement roof slab also includes an EPS extruded polystyrene board 4 disposed on the surface of the bottom of the groove 11 of the partition wall 1. EPS, as a lightweight and high-strength material, can withstand large vertical loads, allowing the basement roof slab structure to have a certain vertical settlement deformation space, thus avoiding the impact of the basement main body settlement on the stability of the enclosure structure. In this embodiment, the thickness of the EPS extruded polystyrene board 4 is preferably 4 cm.

[0037] Preferably, the temporary load-bearing structure of the basement roof slab further includes: a rubber waterstop 7, which is installed on the upper and lower sides of the cross-section of the existing replacement support structure 2 and the new replacement support structure 3. Specifically, the rubber waterstop 7 is a 30mm*30mm rubber waterstop 7. This waterstop has excellent elasticity and durability, can adapt to minor deformations of the structure, ensure long-term effective water-stopping effect, and prevent leakage problems.

[0038] Preferably, the temporary load-bearing structure of the basement roof slab further includes: an isolation membrane 5, which is laid on the side wall surface of the groove 11 of the partition wall 1. The isolation membrane 5 has good waterproofness and adaptability, can effectively isolate moisture, reduce the erosion of the structure by water, and at the same time provide convenience for the seamless connection of the new and old structures (i.e., the new replacement support structure 3 and the existing replacement support structure 2).

[0039] To better understand the temporary load-bearing structure of the basement roof slab of this utility model, the following will be combined with... Figure 2 and Figure 3 A detailed explanation of the construction process of the temporary load-bearing structure for the basement roof slab:

[0040] First, the concrete at the top of partition wall 1 needs to be removed to create groove 11. This concrete replacement and removal process must be executed precisely. The removal dimensions must match the location of the newly constructed structural beam and maintain a consistent width, ensuring the removal height is 40mm below the bottom of the new structural beam, extending from the top of the existing replacement structure 2. Similarly, for the new roof slab, the removal height should also extend from the top of the existing replacement structure 2 to 40mm below the bottom of the new roof slab to ensure structural alignment accuracy.

[0041] Next, during the demolition of partition wall 1 and the connection between the old and new structures (existing replacement structure 2 and new replacement structure 3), precise chiseling is required at a distance of 0.1 times the beam length (L) from the beam end at the center of the beam span. Furthermore, 30mm*30mm rubber waterstops 7 need to be installed on both the upper and lower sides of the top slab section. These waterstops possess excellent elasticity and durability, can adapt to minor structural deformations, ensure long-term effective water sealing, and prevent leakage.

[0042] This utility model has the following advantages:

[0043] 1) The temporary load-bearing structure for the basement roof slab based on this utility model changes the load-bearing form of the basement roof slab at the edge areas of the partition wall from being entirely cantilevered to being fixed on one side and simply supported on the other side. This allows the basement roof slab to withstand larger vertical loads at the edge areas of the partition wall, enhancing the stability of the partition wall. It can ensure that during construction, the foundation pit support structure can work stably and safely in coordination with the surrounding environment and existing structures, reducing the impact on surrounding buildings and the geological environment, ensuring construction safety, preventing safety accidents such as foundation pit collapse, and maintaining public safety in the construction area.

[0044] 2) Based on the groove opened at the top of the partition wall and the setting of the new replacement support structure, the existing replacement support structure is changed from being set against the edge of the partition wall to extending into the groove of the partition wall, thereby increasing the vertical bearing capacity of the basement roof slab in the area of ​​the partition wall edge.

[0045] 3) Install EPS extruded polystyrene board on the bottom surface of the groove of the partition wall. EPS extruded polystyrene board is a lightweight and high-strength material that can effectively reduce the negative impact of structural settlement on the partition wall.

[0046] 4) Lay an isolation film on the side wall surface of the partition wall groove. The isolation film has good waterproofness and adaptability, which can effectively isolate moisture, reduce the erosion of the structure by water, and facilitate the seamless connection of the new and old structures.

[0047] The above description is only a description of the preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A temporary load-bearing structure for a basement roof slab, characterized in that, include: The partition wall, the existing support structure located on both sides of the partition wall, and the new support structure placed inside the partition wall, wherein the new support structure is connected to the existing support structure on the adjacent side.

2. The temporary load-bearing structure for the basement roof slab as described in claim 1, characterized in that, The partition wall includes a wall body and a groove formed at the top of the wall body, wherein the new support structure is disposed in the groove.

3. The temporary load-bearing structure for the basement roof slab as described in claim 2, characterized in that, Also includes: EPS extruded polystyrene board is placed on the surface of the bottom of the groove in the partition wall.

4. The temporary load-bearing structure for the basement roof slab as described in claim 3, characterized in that, The thickness of the EPS extruded board is 4cm.

5. The temporary load-bearing structure for the basement roof slab as described in claim 2, characterized in that, Also includes: An insulating film is laid on the sidewall surface of the groove of the partition wall.

6. The temporary load-bearing structure for the basement roof slab as described in claim 1, characterized in that, The existing support structure includes: an existing roof slab and an existing structural beam located at the bottom of the existing roof slab.

7. The temporary load-bearing structure for the basement roof slab as described in claim 6, characterized in that, The new support structure includes a new top plate and a new structural beam disposed at the bottom of the new top plate. The new top plate is connected to the existing top plate, and the new structural beam is connected to the existing structural beam.

8. The temporary load-bearing structure for the basement roof slab as described in claim 7, characterized in that, The thickness of the new roof slab is equal to the thickness of the existing roof slab, and the thickness of the new structural beam is equal to the thickness of the existing structural beam.

9. The temporary load-bearing structure for the basement roof slab as described in any one of claims 1 to 8, characterized in that, The existing replacement support structure is connected to the partition wall by rebar installation, and the existing replacement support structure is connected to the new replacement support structure by rebar installation.

10. The temporary load-bearing structure for the basement roof slab as described in any one of claims 1 to 8, characterized in that, Also includes: Rubber waterstops are installed on the upper and lower sides of the cross-section of the existing support structure.

Images