Transition structure at height difference joint of rafts
Through the cavity structure formed by the raft foundation, load-bearing structure and reinforced truss floor bearing plate units, the problems of high pouring costs and complex construction at the junction of the basement raft slabs are solved, and the construction effect with low cost and high stability is achieved.
Patent Information
- Application Number
- CN202420367697.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-27
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-02-27
AI Technical Summary
When there is one more layer in the basement, the concrete pouring at the junction of the raft requires a large volume, resulting in high construction costs, complex processes and easy cracking.
The cavity structure formed by the raft foundation, load-bearing structure and steel truss floor bearing plate unit is used to replace large-volume concrete pouring, and secondary pouring is carried out through the steel truss floor bearing plate unit to reduce construction difficulty and cost.
It reduces construction costs, avoids component cracking, simplifies construction technology, and improves structural stability and construction efficiency.
Smart Images
Figure CN222161339U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of building structures, in particular to a transition structure at a raft slab height difference junction. Background Art
[0002] There are many reasons why a basement has an extra floor in some parts of the building, including the influence of geological conditions, later reconstruction and other factors, or to meet the functional requirements of the basement, such as placing tall supporting equipment or other special purposes. The designer may add a floor in certain areas to meet actual needs.
[0003] When there is an extra layer in a part of the basement, the intersection of the raft slabs of the two basements is generally sloped, firstly to facilitate construction and ensure construction quality, and secondly to ensure the gradual continuity of the force on the bearing layer at the variable elevation. When pouring concrete on the raft slab, in order to maintain the shape of the building, the traditional method is to pour large volumes of concrete. With the increase in the amount of concrete and steel bars, the cost also increases; secondly, pouring large volumes of concrete on the raft slab requires special measures, and the construction process becomes complicated; thirdly, pouring large volumes of concrete will release a lot of hydration heat, which will cause the components to crack easily.
[0004] In view of the above situation, it is necessary to provide a raft structure with small casting volume, low cost and guaranteed construction quality to solve the above technical problems. Utility Model Content
[0005] The main purpose of the utility model is to provide a transition structure at the intersection of the height difference of the raft plate to solve the technical problems in the prior art.
[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0007] A transition structure at a raft slab height difference intersection, comprising:
[0008] Raft foundation;
[0009] A load-bearing structure is cast vertically on the raft foundation;
[0010] The basement top slab is cast vertically on the top of the load-bearing structure;
[0011] The steel truss floor deck unit is post-cast between the load-bearing structure and the raft foundation;
[0012] The cavity is surrounded by the raft foundation, load-bearing structure and reinforced truss floor deck units.
[0013] As a further improvement of the present invention, the transition structure at the intersection of the raft slab height difference further includes a cushion layer, and the cushion layer is laid on the bottom surface of the load-bearing structure.
[0014] As a further improvement of the utility model, the raft foundation comprises a first raft, a transition plate and a second raft connected in sequence; the first raft and the second raft are staggered and arranged in parallel along the up-down direction.
[0015] As a further improvement of the present invention, the load-bearing structure includes a shear wall cast at the junction of the transition plate and the second raft plate and perpendicular to the plane of the second raft plate.
[0016] As a further improvement of the present invention, the transition structure at the intersection of the raft slab height difference also includes a first ear unit located at the intersection of the transition plate and the steel truss floor deck unit, and a second ear unit located at the intersection of the shear wall and the steel truss floor deck unit.
[0017] As a further improvement of the present invention, the steel bar truss floor deck unit includes a floor deck arranged on the first cantilever unit and the second cantilever unit, and multiple groups of truss bars are fixedly arranged along the length direction of the floor deck. A third concrete layer is cast on the floor deck, and multiple groups of truss bars are located in the third concrete layer.
[0018] As a further improvement of the present invention, the first ear unit includes a first additional rib and a first concrete layer adapted to the junction of the transition plate and the floor decking plate. A first point rib is arranged at a right angle to the first concrete layer. The first additional rib is bent 90° around the first point rib and both ends extend into the transition plate.
[0019] As a further improvement of the present invention, the second ear unit includes a second additional reinforcement and a second concrete layer adapted to the junction of the shear wall and the floor decking plate. A second point reinforcement is arranged on the upper part of one end of the second concrete layer away from the shear wall. One end of the second additional reinforcement is bent downward by 90° after wrapping around the second point reinforcement, and the other end of the second additional reinforcement is extended into the shear wall and bent downward by 90°.
[0020] As a further improvement of the utility model, a plurality of first beard bars are buried in the basement top plate, and one end of each of the first beard bars extends out of the basement top plate and is located between two adjacent groups of truss bars.
[0021] As a further improvement of the utility model, a plurality of second beard bars are embedded in the first raft slab, and one end of each of the second beard bars extends out of the first raft slab and is located between two adjacent groups of truss bars.
[0022] The utility model replaces the large-volume concrete pouring in the prior art with a cavity structure formed by a raft foundation, a load-bearing structure and a steel truss floor deck unit, thereby reducing construction costs and avoiding technical problems such as component cracking and wasted manpower and material resources caused by large-volume concrete pouring. At the same time, the utility model uses a steel truss floor deck unit for secondary pouring, without the need for demolding, thereby reducing the difficulty of construction. The triangular structure formed by the raft foundation, the load-bearing structure and the steel truss floor deck unit can not only form a cavity, but also has better stability. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is an overall schematic diagram of the utility model;
[0024] Figure 2 It is a cross-sectional schematic diagram of the utility model;
[0025] Figure 3 This is a schematic diagram of the position of the truss reinforcement in the utility model;
[0026] Figure 4 This is a schematic diagram of the steel truss floor deck formwork structure;
[0027] Figure 5 for Figure 2 Enlarged view of point A in the middle;
[0028] Figure 6 for Figure 2 Enlarged view of point B in the middle;
[0029] Figure 7 It is a schematic diagram of the position of the beard ribs in the utility model.
[0030] Figure numerals: 1. raft foundation; 11. first raft; 12. transition plate; 13. second raft; 2. cushion layer; 3. load-bearing structure; 31. shear wall; 4. basement top plate; 5. reinforced truss floor deck unit; 51. third concrete layer; 52. truss reinforcement; 53. floor deck; 6. cavity; 7. first cantilever unit; 71. first additional reinforcement; 72. first concrete layer; 73. first point reinforcement; 8. second cantilever unit; 81. second additional reinforcement; 82. second concrete layer; 83. second point reinforcement; 9. first beard reinforcement; 10. second beard reinforcement. DETAILED DESCRIPTION
[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0032] The terms "first", "second" and "third" in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second" and "third" can explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. All directional indications in the embodiments of the present application (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.
[0033] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.
[0034] like Figure 1 As shown, this embodiment provides a transition structure at the intersection of raft slab height differences, including: a raft slab foundation 1, a load-bearing structure 3, a basement top slab 4, a steel truss floor deck unit 5 and a cavity 6:
[0035] Among them, the load-bearing structure 3 is vertically cast on the raft foundation; the basement top plate 4 is vertically cast on the top of the load-bearing structure 3; the steel truss floor deck unit 5 is post-cast between the load-bearing structure 3 and the raft foundation 1; the raft foundation 1, the load-bearing structure 3 and the steel truss floor deck unit 5 surround to form a cavity 6.
[0036] In the prior art, when pouring concrete on the raft, in order to maintain the building shape, a large volume of concrete is poured; and the amount of steel bars used in the pouring of large volume concrete is large, resulting in an increase in the cost; and the construction process of pouring large volume concrete is complicated, requiring a large amount of manpower and material resources; and the pouring of large volume concrete will release a large amount of hydration heat, which will cause the components to crack easily. The utility model replaces the large volume concrete pouring in the prior art by forming a cavity 6 with a raft foundation 1, a load-bearing structure 3 and a steel truss floor deck unit 5, thereby reducing the construction cost and avoiding the technical problems of component cracking and manpower and material consumption caused by the pouring of large volume concrete. At the same time, the utility model adopts the steel truss floor deck unit 5 for secondary pouring, without the need to remove the mold, reducing the construction difficulty. And the triangular structure formed by the raft foundation 1, the load-bearing structure 3 and the steel truss floor deck unit 5 can not only form a cavity 6, but also has better stability.
[0037] Preferably, if Figure 1 As shown, the transition structure at the intersection of the raft slab height difference also includes a cushion layer 2, and the cushion layer 2 is laid on the bottom surface of the load-bearing structure 3.
[0038] Specifically, the cushion layer 2 is cast with plain concrete, and the casting of the cushion layer 2 facilitates the formwork casting work of the raft foundation 1 and can protect the raft foundation 1 .
[0039] Preferably, if Figure 2 As shown, the raft foundation 1 comprises a first raft 11, a transition plate 12 and a second raft 13 connected in sequence; the first raft 11 and the second raft 13 are staggered and arranged in parallel along the up-down direction.
[0040] Specifically, the angle between the transition plate 12 and the plane where the first raft plate 11 or the second raft plate 13 is located is 45° or 60°; the top surface of the first raft plate 11, the basement top plate 4 and the steel truss floor deck unit 5 are at the same elevation.
[0041] Preferably, if Figure 2 As shown, the load-bearing structure 3 includes a shear wall 31 cast at the junction of the transition plate 12 and the second raft slab 13 and perpendicular to the plane of the second raft slab 13 .
[0042] Preferably, if Figure 2 As shown, the transition structure at the intersection of the raft slab height difference also includes a first lug unit 7 located at the intersection of the transition plate 12 and the steel truss floor deck unit 5, and a second lug unit 8 located at the intersection of the shear wall 31 and the steel truss floor deck unit 5.
[0043] Specifically, the first ear unit 7 and the second ear unit 8 play a supporting role, which not only facilitates the template erection of the steel truss floor deck unit 5, but also serves as a supporting point of the steel truss floor deck unit 5, thereby improving the stability and safety of the steel truss floor deck unit 5.
[0044] Preferably, if Figure 3 , 4 As shown, the steel bar truss floor decking unit 5 includes a floor decking 53 arranged on the first cantilever unit 7 and the second cantilever unit 8, a plurality of groups of truss bars 52 are fixedly arranged along the length direction of the floor decking 53, a third concrete layer 51 is cast on the floor decking 53, and the plurality of groups of truss bars 52 are located in the third concrete layer 51.
[0045] Specifically, multiple groups of truss bars 52 are evenly arranged along the length direction of the floor deck 53, each group of truss bars 52 is perpendicular to the floor deck 53 and its bottom is welded to the upper surface of the floor deck 53; the floor deck 53 is a rectangular thin steel plate. During construction, after the bottom of each group of truss bars 52 perpendicular to the floor deck 53 is welded to the upper surface of the floor deck 53, the third concrete layer 51 is poured and the multiple groups of truss bars 52 are covered therein. Thus, the steel truss floor deck unit 5 formed by the floor deck 53, the multiple groups of truss bars 52 and the third concrete layer 51 is cast for the second time without the need to remove the formwork, thus avoiding the inconvenience of the traditional formwork casting method and reducing the construction difficulty.
[0046] Preferably, if Figure 5 As shown, the first ear unit 7 includes a first additional rib 71 and a first concrete layer 72 adapted to the junction of the transition plate 12 and the floor decking plate 53. A first point rib 73 is arranged at a right angle to the first concrete layer 72. The first additional rib 71 is bent 90° around the first point rib 73 and both ends extend into the transition plate 12.
[0047] Specifically, the cross section of the first ear unit 7 is triangular, and the top elevation is the same as the bottom elevation of the steel truss floor deck unit 5. The first point reinforcement 73 and the first additional reinforcement 71 are arranged to improve the strength of the first concrete layer 72 and prevent cracks therefrom. The first ear unit 7 formed by the first additional reinforcement 71, the first point reinforcement 73 and the first concrete layer 72 supports one end of the steel truss floor deck unit 5, which is not only convenient for the template erection of the steel truss floor deck unit 5, but also can serve as a support point at one end of the steel truss floor deck unit 5, thereby improving the stability and safety of the steel truss floor deck unit 5.
[0048] Preferably, if Figure 6As shown, the second ear unit 8 includes a second additional reinforcement 81 and a second concrete layer 82 adapted to the junction of the shear wall 31 and the floor decking slab 53. A second point reinforcement 83 is arranged on the upper part of one end of the second concrete layer 82 away from the shear wall 31. One end of the second additional reinforcement 81 is bent downward by 90° after wrapping around the second point reinforcement 83, and the other end of the second additional reinforcement 81 is extended into the shear wall 31 and then bent downward by 90°.
[0049] Specifically, the second ear unit 8 is arranged on the side of the load-bearing structure 3 close to the cavity 6, and its cross-section is rectangular, and the top surface elevation is the same as the bottom elevation of the steel truss floor deck unit 5. The arrangement of the second point reinforcement 83 and the second additional reinforcement 81 facilitates the improvement of the strength of the second concrete layer 82 and prevents cracks therefrom. The second ear unit 8 formed by the second additional reinforcement 81, the second point reinforcement 83 and the second concrete layer 82 supports the other end of the steel truss floor deck unit 5, which is not only convenient for the template erection of the steel truss floor deck unit 5, but also can serve as a support point for the other end of the steel truss floor deck unit 5. The arrangement of the first ear unit 7 and the second ear unit 8 facilitates the improvement of the overall stability and safety of the steel truss floor deck unit 5.
[0050] Preferably, if Figure 7 As shown, a plurality of first truss bars 9 are embedded in the basement top plate 4 , and one end of each first truss bar 9 extends out of the basement top plate 4 and is located between two adjacent groups of truss bars 52 .
[0051] Preferably, if Figure 7 As shown, a plurality of second ribs 10 are embedded in the first raft 11 , and one end of each second rib 10 extends out of the first raft 11 and is located between two adjacent groups of truss bars 52 .
[0052] Specifically, one end of the first beard bar 9 and the second beard bar 10 are respectively buried in the basement top plate 4 and the first raft plate 11 in advance, and the other end of the first beard bar 9 and the second beard bar 10 are exposed and located between two adjacent groups of truss bars 52. The arrangement of the first beard bar 9 and the second beard bar 10 is conducive to improving the integrity between the steel truss floor deck unit 5 and the basement top plate 4 and the first raft plate 11, so that the horizontal force can be better transmitted.
[0053] In summary, the structure of the cavity 6 formed by the raft foundation 1, the load-bearing structure 3 and the steel truss floor deck unit 5 replaces the large-volume concrete pouring in the prior art, thereby reducing the construction cost and avoiding the technical problems of component cracking and wasting manpower and material resources caused by the large-volume concrete pouring. At the same time, the steel truss floor deck unit 5 is used for secondary pouring, and there is no need to remove the mold, which reduces the construction difficulty. The triangular structure formed by the raft foundation 1, the load-bearing structure 3 and the steel truss floor deck unit 5 can not only form the cavity 6, but also has better stability. In addition, the setting of the beard rib can ensure the transmission of horizontal force, so that the structure of the transition structure at the intersection of the raft height difference is stable.
[0054] The above detailed description of the specific implementation of the utility model is only used as an example, and the utility model is not limited to the specific implementation described above. For those skilled in the art, any equivalent modification or substitution of the utility model is also within the scope of the utility model. Therefore, the equalization, modification, improvement, etc. made without departing from the spirit and principle of the utility model should be included in the scope of the utility model.
Claims
1. A transition structure at the intersection of raft height differences, It is characterized in that include: Raft foundation; A load-bearing structure is cast vertically on the raft foundation; The basement top slab is cast vertically on the top of the load-bearing structure; The steel truss floor deck unit is post-cast between the load-bearing structure and the raft foundation; The cavity is surrounded by the raft foundation, load-bearing structure and reinforced truss floor deck units.
2. The transition structure at the intersection of the raft plate height difference according to claim 1, It is characterized in that The transition structure at the intersection of the raft slab height difference also includes a cushion layer, which is laid on the bottom surface of the load-bearing structure.
3. The transition structure at the intersection of the raft height difference according to claim 1, It is characterized in that The raft foundation comprises a first raft, a transition plate and a second raft which are connected in sequence; the first raft and the second raft are staggered and arranged in parallel along the up-down direction.
4. The transition structure at the intersection of the raft plate height difference according to claim 3, It is characterized in that The load-bearing structure comprises a shear wall cast at the junction of the transition plate and the second raft plate and perpendicular to the plane of the second raft plate.
5. The transition structure at the intersection of the raft plate height difference according to claim 4, It is characterized in that The transition structure at the intersection of the raft slab height difference also includes a first ear unit located at the intersection of the transition slab and the steel truss floor deck unit, and a second ear unit located at the intersection of the shear wall and the steel truss floor deck unit.
6. The transition structure at the intersection of the raft plate height difference according to claim 5, It is characterized in that The steel bar truss floor deck unit includes a floor deck arranged on the first cantilever unit and the second cantilever unit, and multiple groups of truss bars are fixedly arranged along the length direction of the floor deck. A third concrete layer is poured on the floor deck, and multiple groups of truss bars are located in the third concrete layer.
7. The transition structure at the intersection of the raft plate height difference according to claim 5, It is characterized in that The first ear unit includes a first additional rib and a first concrete layer adapted to the junction of the transition plate and the floor decking plate. A first point rib is arranged at a right angle to the first concrete layer. The first additional rib is bent 90° around the first point rib and both ends extend into the transition plate.
8. The transition structure at the intersection of the raft plate height difference according to claim 5, It is characterized in that The second ear unit includes a second additional reinforcement and a second concrete layer adapted to the junction of the shear wall and the floor decking plate. A second point reinforcement is arranged on the upper part of one end of the second concrete layer away from the shear wall. One end of the second additional reinforcement is bent downward by 90° after wrapping around the second point reinforcement, and the other end of the second additional reinforcement is extended into the shear wall and bent downward by 90°.
9. The transition structure at the intersection of the raft plate height difference according to claim 6, It is characterized in that A plurality of first beard bars are embedded in the basement top plate, and one end of each of the first beard bars extends out of the basement top plate and is located between two adjacent groups of truss bars.
10. The transition structure at the intersection of the raft plate height difference according to claim 6, It is characterized in that A plurality of second beard bars are embedded in the first raft slab, and one end of each of the second beard bars extends out of the first raft slab and is located between two adjacent groups of truss bars.