Underground space building bottom plate structure

Abstract

The utility model discloses a bottom plate structure of an underground space building, which comprises a foundation beam group provided with a first bottom beam and a second bottom beam which are vertically arranged; the multiple prefabricated bottom plates are transversely and sequentially arranged, the ends of the multiple prefabricated bottom plates are arranged on the first bottom beam, the side portions of the prefabricated bottom plates arranged on the outer side are further arranged on the second bottom beam, first steel bar heads are arranged on the side faces of the prefabricated bottom plates in a protruding mode, and a first grouting joint is formed between every two adjacent prefabricated bottom plates; the bottom support structure is arranged at the bottom of the first grouting joint and connected with the first steel bar head; and the first prefabricated wall body is arranged on the second bottom beam, and a second grouting joint is formed between the prefabricated bottom plate and the side face of the first prefabricated wall body. According to the structure, through the arranged bottom support structure, the bottom of the first grouting joint can be sealed, leakage of sealing mortar is prevented, waste caused by leakage of the sealing mortar can be reduced, and the construction quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of building foundation slab construction design technology, and in particular to a building foundation slab structure. Background Technology

[0002] Underground spaces are constructed below ground level and are typically used for sunken garages, basements, and similar purposes. Generally, underground spaces have relatively simple structures without complex partitions, and ventilation and lighting equipment are usually ceiling-mounted. Therefore, some underground space building foundations are designed using prefabricated assembly structures. In the prefabrication construction of the building foundation, the following steps are taken: first, foundation beams are poured on the construction site according to the design plan; then, prefabricated foundation slabs (multiple slabs arranged sequentially on the foundation beams) are installed on the foundation beams; next, walls are installed on the foundation beams; and finally, sealing mortar is filled between adjacent prefabricated foundation slabs and between the prefabricated foundation slabs and the walls to achieve a seal.

[0003] The foundation slab typically rests beneath the subgrade soil, which is usually slightly lower than the bottom surface of the slab. The vertical joints between adjacent precast slabs are prone to leakage when filling with sealing mortar. This necessitates the use of excessive sealing mortar to ensure complete filling, resulting in significant mortar waste and increased construction costs. Another method involves inserting wooden strips into the joints. However, this requires manual insertion of the strips into the narrow joints and visual identification of their placement. This method makes it difficult to ensure accurate insertion, leading to poor sealing at the bottom of the joint and continued mortar leakage, further wasting mortar. Utility Model Content

[0004] The purpose of this utility model is to provide a base slab structure for underground space buildings that can reduce the waste of sealing mortar.

[0005] To achieve the above objectives, a foundation slab structure for an underground space building is provided, comprising: a foundation beam assembly having a vertically arranged first bottom beam and a second bottom beam; a precast foundation slab, comprising multiple precast foundation slabs arranged transversely, with the ends of the multiple precast foundation slabs resting on the first bottom beam, and the sides of the precast foundation slabs arranged on the outer side resting on the second bottom beam, each of the precast foundation slabs having a protruding first reinforcing bar head on its side, and a first grouting joint between adjacent precast foundation slabs; a bottom support structure, the bottom support structure being disposed at the bottom of the first grouting joint and connected to the first reinforcing bar head, and abutting against the side of the precast foundation slab; and a first precast wall, the first precast wall being disposed on the second bottom beam, and the first precast wall abutting against or having a gap with the first reinforcing bar head arranged on the outer precast foundation slab, thereby forming a second grouting joint between the side of the precast foundation slab and the first precast wall.

[0006] According to the aforementioned underground space building base slab structure, the base support structure includes a sleeve, bolts, connecting rods, and concrete strips. The sleeve is fitted onto the head of a first reinforcing bar. The bolts are threaded through the side wall of the sleeve and abut against the side wall of the first reinforcing bar. The concrete strip is located below the sleeve and abuts against the side of the precast base slab. The connecting rods are fixedly connected to the sleeve and the concrete strip respectively.

[0007] According to the aforementioned underground space building base slab structure, the top of both the first and second base beams is provided with sunken positioning steps, and the precast base slab is placed on the positioning steps.

[0008] According to the aforementioned underground space building base slab structure, the bottom of the first precast wall has a positioning part that is wider at the top and narrower at the bottom, and the top of the second bottom beam is recessed with a positioning groove to accommodate the positioning part, and the inner surface of the positioning groove is spaced apart from the positioning part.

[0009] According to the aforementioned underground space building base slab structure, among the plurality of prefabricated base slabs, a drainage structure is provided between two of the prefabricated base slabs.

[0010] According to the aforementioned underground space building foundation slab structure, the drainage structure includes a cast-in-place trough, the cast-in-place trough having a reinforcing cage, and the reinforcing cage being fixedly connected to a first reinforcing bar head.

[0011] According to the aforementioned underground space building base slab structure, the drainage structure includes a precast trough, the end of which is placed on a first bottom beam, and the bottom support structure is provided between the outer side of the precast trough and the precast base slab.

[0012] According to the aforementioned underground space building base slab structure, the top side edge of the prefabricated base slab has a chamfer.

[0013] Beneficial effects: As described above, the bottom support structure can seal the bottom of the first grouting joint, preventing leakage of sealing mortar and reducing waste caused by leakage, thus improving construction quality. Furthermore, the bottom support structure allows for the formation of a first grouting joint with a suitable width and good consistency between any adjacent precast slabs, improving the consistency of sealing construction. During the installation of precast slabs, there is no need to specifically measure and adjust the reserved joint width, which also facilitates the installation and positioning of precast slabs.

[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0016] Figure 1 This is a front view structural diagram of an embodiment of the present utility model;

[0017] Figure 2 for Figure 1 Enlarged view of part A;

[0018] Figure 3 This is a top view of an embodiment of the present utility model;

[0019] Figure 4 This is a front view structural diagram of another embodiment of the present utility model. Detailed Implementation

[0020] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0021] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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 this utility model.

[0022] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0023] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0024] Reference Figure 1-4An underground space building base slab structure includes a foundation beam group, a precast base slab 20, a base support structure 30, and a first precast wall 40. The foundation beam group has a first bottom beam 11 and a second bottom beam 12 arranged vertically. Both the first bottom beam 11 and the second bottom beam 12 have two parallel bottom beams. The first bottom beam 11 and the second bottom beam 12 are connected end to end to form a rectangular frame structure. Multiple precast base slabs 20 are arranged horizontally in sequence. The ends of the multiple precast base slabs 20 are placed on the first bottom beam 11, and the sides of the precast base slabs 20 arranged on the outer side are also placed on the second bottom beam 12. Each precast base slab 20 has a first reinforcing bar head 21 protruding from its side. There is a first grouting joint 22 between any two adjacent precast base slabs 20. The bottom support structure 30 is set at the bottom of the first grouting joint 22. The bottom support structure 30 is connected to the first reinforcing bar head 21, and the bottom support structure 30 also abuts against the side of the precast base slab 20. The first precast wall 40 is set on the second bottom beam 12. The first precast wall 40 abuts against the first reinforcing bar head 21 arranged on the outer precast base slab 20, thereby forming a second grouting joint 23 between the side of the precast base slab 20 and the first precast wall 40.

[0025] During construction, the foundation beam assembly is built first, then the first precast base slab 20 is laid, followed by the installation of the base support structure 30 on the first steel bar head 21 of the precast base slab 20, and then the second precast base slab 20 is laid. The sides of both precast base slabs 20 abut against the base support structure 30. Then the remaining precast base slabs 20 are laid. After the precast base slabs 20 are laid, the first precast wall 40 is installed. Sealing mortar is filled into the first grouting joint 22 and the second grouting joint 23 to seal the joints.

[0026] As described above, the bottom of the first grouting joint 22 can be sealed by the bottom support structure 30 to prevent leakage of sealing mortar, reduce waste caused by leakage of sealing mortar, and improve construction quality. Moreover, the bottom support structure 30 can form a first grouting joint 22 with appropriate width and good consistency between any adjacent precast base plates 20, improve the consistency of sealing construction, and eliminate the need to specially measure and adjust the reserved joint width when laying the precast base plates 20, which also facilitates the laying and positioning of the precast base plates 20.

[0027] During construction, sealing mortar is also filled between the bottom of the first precast wall 40 and the second bottom beam 12; the bottom of the second grouting joint 23 is the second bottom beam 12, so as to prevent the sealing mortar in the second grouting joint 23 from leaking out.

[0028] In some embodiments, the first precast wall 40 may also have a gap with the first reinforcing bar head 21 arranged on the outer side of the precast base slab 20.

[0029] In this embodiment, the base support structure 30 includes a sleeve 31, a bolt 32, a connecting rod 33, and a concrete strip 34. The sleeve 31 is fitted onto the first reinforcing bar head 21. The side wall of the sleeve 31 has a threaded hole that mates with the bolt 32. The bolt 32 passes through the threaded hole on the side wall of the sleeve 31, and its end abuts against the side wall of the first reinforcing bar head 21. The concrete strip 34 is positioned below the sleeve 31 and abuts against the side of the precast base plate 20. The connecting rod 33 is fixedly connected to both the sleeve 31 and the concrete strip 34. The concrete strip 34 abuts against the precast base plate 20 to seal the bottom of the first grouting joint 22. The sealing mortar can wrap around the first reinforcing bar head 21, the sleeve 31, and the connecting rod 33 to prevent them from rusting and corroding later.

[0030] In some embodiments, for the base support structure 30, the connecting rod 33 can also be directly welded to the first reinforcing bar head 21.

[0031] In this embodiment, the top of the first bottom beam 11 and the second bottom beam 12 are both provided with sunken positioning steps 13, and the precast base plate 20 is placed on the positioning steps 13 to facilitate the paving and positioning of the precast base plate 20 and to prevent the precast base plate 20 from shifting laterally.

[0032] In this embodiment, the bottom of the first precast wall 40 has a positioning part 41 that is wider at the top and narrower at the bottom, and the top of the second bottom beam 12 is recessed with a positioning groove 14 to accommodate the positioning part 41. The inner surface of the positioning groove 14 is spaced apart from the positioning part 41. During construction, sealing mortar is also filled between the positioning part 41 and the positioning groove 14 to improve the sealing effect. In addition, the positioning part 41 can also improve the anti-lateral thrust performance of the first precast wall 40 and improve the stability of the building.

[0033] Among the multiple precast base slabs 20, a drainage structure 50 is provided between two of them, with the bottom of the drainage structure 50 protruding from the bottom surface of the precast base slab 20. The drainage structure 50 can drain accumulated water; water, electricity and gas pipelines can also be laid within the drainage structure 50 without having to cut grooves in the precast base slab 20.

[0034] In some embodiments, the drainage structure 50 includes a cast-in-place trough 51, within which a reinforcing cage 52 is fixedly connected to a first reinforcing bar head 21. During construction, a certain width of space is left between the two precast base slabs 20. After the bottom formwork is installed in the foundation soil, the reinforcing cage 52 is placed, and then the reinforcing cage 52 is fixedly connected to the first reinforcing bar head 21. Finally, concrete is poured to form the cast-in-place trough 51.

[0035] In some embodiments, the drainage structure 50 includes a precast trough 53, the end of which is mounted on a first bottom beam 11, and a bottom support structure 30 is provided between the outer side of the precast trough 53 and the precast bottom slab 20, the bottom support structure 30 being connected to a first reinforcing bar head 21 on the side of the precast bottom slab 20. The joint between the precast trough 53 and the precast bottom slab 20 is also filled with sealing mortar.

[0036] In this embodiment, the top side edge of the precast base plate 20 has a chamfer so that the first grouting joint 22 and the second grouting joint 23 are wider at the top and narrower at the bottom, so as to facilitate the filling of mortar.

[0037] In addition, a second precast wall 60 is provided on the top of the first bottom beam 11, and a positioning part 41 is also provided on the bottom of the second precast wall 60. Correspondingly, a positioning groove 14 is also provided on the top of the first bottom beam 11. Sealing mortar is also filled between the second precast wall 60 and the first bottom beam 11. A second reinforcing bar head 24 is protruding from the end face of the precast base plate 20. The second precast wall 60 abuts against the second reinforcing bar head 24 or has a gap. A third grouting joint 25 is formed between the end face of the second precast wall 60 and the precast base plate 20. During construction, the third grouting joint 25 is also filled with sealing mortar.

[0038] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A foundation slab structure for an underground space building, characterized in that, include: A foundation beam assembly, wherein the foundation beam assembly has a first bottom beam and a second bottom beam arranged vertically; The precast base slab is configured as a plurality of precast base slabs arranged in a transverse sequence. The ends of the plurality of precast base slabs are placed on a first base beam, and the sides of the precast base slabs arranged on the outer side are also placed on a second base beam. Each of the precast base slabs has a first reinforcing bar protruding from its side, and there is a first grouting joint between two adjacent precast base slabs. A bottom support structure is provided at the bottom of the first grouting joint, connected to the first reinforcing bar head, and abutting against the side of the precast base plate; The first precast wall is disposed on the second bottom beam, and the first precast wall abuts against or has a gap with the first steel bar head arranged on the outer side of the precast base plate to form a second grouting joint between the precast base plate and the side of the first precast wall.

2. The underground space building foundation slab structure according to claim 1, characterized in that, The base support structure includes a sleeve, bolts, connecting rods, and a concrete strip. The sleeve is fitted onto the head of the first reinforcing bar. The bolts are threaded through the side wall of the sleeve and abut against the side wall of the first reinforcing bar. The concrete strip is located below the sleeve and abuts against the side of the precast base plate. The connecting rods are fixedly connected to the sleeve and the concrete strip respectively.

3. The underground space building foundation slab structure according to claim 1, characterized in that, The top of both the first and second bottom beams is provided with a recessed positioning step, and the precast base plate is placed on the positioning step.

4. The underground space building foundation slab structure according to claim 1, characterized in that, The bottom of the first precast wall has a positioning part that is wider at the top and narrower at the bottom, and the top of the second bottom beam is recessed with a positioning groove to accommodate the positioning part, and the inner surface of the positioning groove is spaced apart from the positioning part.

5. A foundation slab structure for an underground space building according to claim 1, 2, 3, or 4, characterized in that, Among the multiple precast base slabs, a drainage structure is provided between two of them.

6. The underground space building foundation slab structure according to claim 5, characterized in that, The drainage structure includes a cast-in-place trough, and the cast-in-place trough contains a reinforcing cage, which is fixedly connected to a first reinforcing bar head.

7. The underground space building foundation slab structure according to claim 5, characterized in that, The drainage structure includes a precast trough, the end of which is mounted on a first bottom beam, and the bottom support structure is provided between the outer side of the precast trough and the precast bottom plate.

8. The underground space building foundation slab structure according to claim 1, characterized in that, The top side edge of the precast base plate has a chamfer.

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