Bottom plate reinforcing steel bar supporting structure

Abstract

The utility model discloses a bottom plate reinforcing steel bar supporting structure which comprises a pile foundation, a reinforcing steel bar and a reinforcing steel bar, all the bearing ribs extend upwards from the top of the pile head of the pile foundation, each bearing rib comprises an outwards-extending section and a bearing section fixedly connected with one end of the outwards-extending section, each bearing section is bent outwards to be in a horizontal state, and all the bearing sections jointly bear the upper row of steel bars; the fastening device is of an annular structure, an annular body of the fastening device is fixedly connected with the middle of all or part of the outwards-extending section, the pile head serves as a supporting base, the bearing ribs with the horizontally-bent ends serve as a bearing structure of the upper row of steel bars, the upper row of steel bars can be effectively supported, the use amount of field horse stool ribs is reduced, and the construction cost is reduced. And the on-site steel bar processing amount is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of concrete bottom plate construction, more specifically, the utility model relates to a bottom plate steel bar support structure. BACKGROUND

[0002] The concrete bottom plate of a building, as the lowermost structure of the building, bears the important role of waterproofing the building, and in addition to needing to do a good job of building external waterproofing between the bottom surface of the bottom plate and the soil body, the concrete bottom plate also needs to have the ability of building self-waterproofing, so the thickness of a conventional bottom plate is generally above 400 mm, which is larger than the thickness of other types of plates, and in order to ensure the stress performance of the concrete bottom plate, an arrangement mode of two rows of steel bars above and below is adopted, wherein the lower row of steel bars can be directly placed on the waterproofing membrane through the mode of a cushion block, and the binding operation of the lower row of steel bars is relatively easy, but due to the excessively large spacing between the two rows of steel bars above and below, the upper row of steel bars cannot be supported by using a cushion block or a plate thickness control structure, and auxiliary measures need to be used to support the upper row of steel bars.

[0003] In the conventional method, after the lower row of steel bars is bound, a J-shaped stool bar is processed on site and is uniformly bound to the lower row of steel bars for supporting the upper row of steel bars, and the manufacturing process increases the processing amount of the steel bars, and the use of the stool bar requires the binding of iron wire to the lower layer of steel bar mesh, which increases the consumption of people, materials and machines, and increases the construction cost.

[0004] Therefore, a new support structure needs to be proposed, which can use the pile head cooperated with the concrete bottom plate to complete the support of the upper row of steel bars. SUMMARY

[0005] An object of the utility model is to provide a bottom plate steel bar support structure, which completes the support of the upper row of steel bars on the pile head, effectively reducing the amount of stool bar.

[0006] In order to achieve these objects and other advantages of the utility model, according to one aspect of the utility model, a bottom plate steel bar support structure is provided, which comprises: a pile foundation, the pile head of which is exposed to the bottom surface of a foundation pit; a plurality of supporting bars, each of which extends upward from the top of the pile head of the pile foundation, each of the supporting bars comprises an outward extending segment and a supporting segment fixedly connected to one end of the outward extending segment, each of the supporting segments is bent outward to a horizontal state, and all of the supporting segments collectively support the upper row of steel bars; and a fastening device in the form of a ring, the ring body of the fastening device is fixedly connected to the middle part of all or part of the outward extending segments.

[0007] Preferably, the pile foundation is a prefabricated pipe pile, a pile core steel bar cage is installed in the pile core of the pile foundation, the other end of each of the outward extending segments is one-to-one matched and connected to a longitudinal bar in the pile core steel bar cage, and the outward extending segments are arranged obliquely upward outside the pile foundation.

[0008] Preferably, the angle between the overhanging section and the horizontal plane is not less than 75°.

[0009] Preferably, the pile head of the pile foundation is provided with a horizontal pile foundation end plate, and one end of the overhanging section is welded to the pile foundation end plate.

[0010] Preferably, the fastening device is at least one layer of tie rods arranged in a polygon horizontally, both ends of the tie rod are detachably connected to two overhanging sections respectively, and adjacent ends of any two adjacent tie rods on the same layer are detachably connected to one overhanging section.

[0011] Preferably, the tie rod comprises a rod body, two thread sleeves coaxially arranged at both ends of the rod body and having opposite threads, a threaded rod matched with the threads of the thread sleeves is sleeved in the thread sleeves, a hook is connected to the outer end of the threaded rod, and the hook is clamped on the corresponding overhanging section.

[0012] Preferably, a threaded hole is arranged on the hook, a fastening screw is sleeved in the threaded hole, and the inner wall of the hook and the end of the fastening screw clamp the corresponding overhanging section.

[0013] Preferably, the number of the supporting bars is not less than 6.

[0014] Preferably, the diameter of the supporting bar is not less than 16 mm.

[0015] Preferably, a stirrup is arranged below the upper row of steel bars and supports the upper row of steel bars.

[0016] The utility model at least has following beneficial effects:

[0017] The bottom plate steel bar supporting structure provided by the utility model uses the pile head as a supporting seat and uses the end horizontal bending supporting bar as the supporting structure of the upper row of steel bars, can effectively support the upper row of steel bars in the field construction, saves the field steel bar processing amount and saves the steel bar usage amount. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a construction overall schematic view in one of the technical schemes of the utility model;

[0019] Figure 2 It is an overall side schematic view in one of the technical schemes of the utility model;

[0020] Figure 3 It is a large-scale drawing of the method of connecting the supporting bar to the pile core steel bar cage in one of the technical schemes of the utility model;

[0021] Figure 4The utility model discloses a technical scheme of the pile core reinforcement cage connecting bearing bar method's schematic diagram.

[0022] Figure 5 The utility model discloses a technical scheme of the pile base end plate connecting bearing bar method's schematic diagram.

[0023] Figure 6 The utility model discloses a technical scheme of the pile base end plate connecting bearing bar method's schematic diagram.

[0024] Figure 7 The utility model discloses a technical scheme of the pile base end plate connecting bearing bar method's schematic diagram

[0025] Figure 8 The utility model discloses a technical scheme of the pile base end plate connecting bearing bar method's schematic diagram.

[0026] Figure 9 The utility model discloses a technical scheme of the pile base end plate connecting bearing bar method's schematic diagram.

[0027] Figure 10 The utility model discloses a technical scheme of the pile base end plate connecting bearing bar method's schematic diagram.

[0028] Figure 11 The utility model discloses a technical scheme of the pile base end plate connecting bearing bar method's schematic diagram.

[0029] Legend: 1 - lower row of reinforcement, 2 - upper row of reinforcement, 3 - pile foundation, 31 - pile foundation end plate, 310 - welding plate, 4 - tie rod, 41 - rod body, 42 - threaded sleeve, 43 - threaded rod, 44 - hook, 440 - threaded hole, 45 - fastening screw, 5 - bearing bar, 51 - overhanging section, 52 - bearing section, 6 - concrete cushion, 7 - pile core reinforcement cage. DETAILED DESCRIPTION

[0030] The utility model discloses a technical scheme of the pile core reinforcement cage connecting bearing bar method's schematic diagram.

[0031] It should be understood that the terms such as "have", "contain" and "include" used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0032] It should be noted that the experimental methods in the following embodiments are conventional methods unless otherwise specified, and the components can be obtained from commercial channels unless otherwise specified; in the description of the present application, it should be noted that unless otherwise specifically defined and limited, the terms "mounting", "connection", "setting" should be understood broadly, for example, it can be fixedly connected, set, or detachably connected, set, or integrally connected, set. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. The orientation or positional relationship indicated by the terms "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the present application.

[0033] As shown in Figures 1-11 The technical scheme of the present application provides a bottom plate steel bar support structure, comprising: a pile foundation 3, the pile head of which is exposed to the bottom surface of the foundation pit; a plurality of supporting bars 5, each of which extends upward from the top of the pile head of the pile foundation 3, each of the supporting bars 5 comprises an outward extending section 51 and a supporting section 52 fixedly connected to one end of the outward extending section, each of the supporting sections 52 is bent outward to a horizontal state, and all of the supporting sections 52 collectively support the upper row of steel bars 2; a fastening device in the form of a ring, the ring body of the fastening device is fixedly connected to the middle part of all or part of the outward extending sections 51.

[0034] In the technical solution, the pile foundation 3 is a prefabricated pipe pile that has been driven into place, or a concrete bored pile that has had the pile head broken off, and has good bearing capacity, and the pile head part has been treated, and can be poured together with the concrete bottom plate, the bottom of the foundation pit has been constructed with a concrete cushion 6, and the laying of the bottom plate waterproof coiled material has been completed, and the lower row of steel bars 1 in the concrete bottom plate have been tied and raised by the cushion block, the supporting steel bars 5 can be the original steel bars in the pile foundation 3, which are bent into a horizontal shape by artificial bending of the end portion after being extended outward from the pile head of the pile foundation 3, the supporting steel bars 5 can also be a steel bar section that is added based on the original steel bars or structure of the pile head through lap joint, sleeve connection, welding, etc., all the supporting steel bars 5 are arranged in a ring shape with the shaft of the pile foundation 3 as the center, the outward extension sections 51 of all the supporting steel bars 5 have the same inclination angle, the supporting sections 52 have uniform heights, all the supporting sections 52 jointly bear the subsequent upper row of steel bars 2 and are tied with the upper row of steel bars 2, the fastening device can be a circular hoop, a ring-shaped steel plate, a rope chain, etc., which can be connected with the contacted outward extension sections 51 through tying, clamping or welding, and the fastening device is used to horizontally constrain all or part of the outward extension sections 51 in the middle to avoid the outward extension sections 51 from being bent downward when the supporting sections 52 are subjected to excessive stress.

[0035] In the technical solution, from the perspective of stress analysis of the concrete bottom plate, if the supporting steel bars 5 are post-connected steel bars on the pile foundation 3, they can be considered as measure bars and do not need to be considered for additional stress, the supporting steel bars 5 can be plain round steel bars or ribbed steel bars, if the supporting steel bars 5 are part of the designed stress steel bars in the pile foundation 3 or subsequent pouring, the connection method, steel bar anchoring length, steel bar type and category need to be considered to meet the existing local design specifications, such as Figures 7-8 In the technical solution, the pile foundation 3 is in the form of a prefabricated pipe pile, part of the longitudinal bars in the pile core steel bar cage 7 are vertically extended out of the pile foundation 3 as the external steel bars 5, and are bent to form the supporting sections 52, in this embodiment, the fastening device can be a hoop, and can also not be provided.

[0036] In the technical solution, as shown in Figure 1 The upper row of steel bars 2 in the concrete top plate is supported by the supporting steel bars 5 connected to the pile heads of the several pile foundations 3, which facilitates the positioning and construction of the upper row of steel bars 2, and can effectively save the processing amount of the horse stool, and optionally, when the pile foundation design position has a large pile spacing, a horse stool can be appropriately added in the span to avoid the downward deflection of the upper row of steel bars 2.

[0037] In another technical solution, the supporting reinforcement extends upward from the top of the pile head. Specifically, the pile foundation 3 is a precast pipe pile, and a core reinforcement cage 7 is installed inside the pile core. The other end of each extended section 51 is matched and connected to the longitudinal reinforcement in the core reinforcement cage 7. The extended sections 51 are inclined upward outside the pile foundation 3. In this technical solution, the pile foundation 3 is a precast pipe pile with the cut surface treated, or a precast pipe pile that does not require cutting. The core reinforcement cage 7 needs to be inserted into the pile foundation 3 to form a core concrete area that meets design requirements during subsequent concrete pouring. The core reinforcement cage 7 is fixed in the pile foundation 3 by adding conventional reinforcement. The extended sections 51 can be connected to the longitudinal reinforcement in the core reinforcement cage 7 by lap splicing, sleeve connection, welding, or other methods. Figures 3-4 As shown, when making the core reinforcement cage 7, the steel bar segments extending from the pile head of the pile foundation 3 are first bent to form the overhanging section 51 to meet the bending and anchoring requirements of the core reinforcement cage 7 in the concrete base slab. Then, they are bent to form the horizontal support section 52. At this time, since the inclined overhanging section 51 is more prone to deflection, a fastening device must be added. The fastening device can be a stirrup.

[0038] In another technical solution, the angle between the extended section 51 and the horizontal plane is not less than 75°, which can meet the anchorage angle requirements of the core steel bars in the concrete base slab while improving the deflection resistance of the extended section 51.

[0039] In another technical solution, the supporting reinforcement 5 extends upward from the top of the pile head of the pile foundation 3. Specifically, the pile head of the pile foundation 3 is equipped with a horizontal pile end plate 31, and one end of the extended section 51 is welded to the pile end plate 31. In this technical solution, the pile head of the pile foundation 3 can fix the pile end plate 31. Especially for precast pipe piles that have not been cut, the existing end steel plate can be used as the pile end plate 31. Figures 5-6 As shown, the extended section 51 is connected to the pile foundation end plate 31 by welding. Optionally, the supporting bars 5 can be cut into pieces and then bent according to the design requirements. Then, rectangular welding plates 310 are cut out. The supporting bars 5 are welded to the welding plates 310 one by one according to the designed inclination angle of the extended section 51. After the pile foundation end plate 31 is completed, the welding plates 310 with supporting bars 5 are welded to the pile foundation end plate 31. This saves construction time and facilitates on-site welding operations.

[0040] In another technical solution, the fastening device is at least one layer of tie rods 4 arranged in a polygon horizontally, two ends of the tie rod 4 are detachably connected with two outer extensions 51, wherein the adjacent ends of any two adjacent tie rods 4 on the same layer are detachably connected with one outer extension 51, in this technical solution, the tie rod 4 can be a rod body structure, or other rod body structures with self-tightening function, such as Figure 10 As shown, the tie rods 4 need to form a regular polygon structure at the same height, and the center point is located in the middle of all outer extensions 51, so that when the support section 52 is subjected to downward force, the outer extension 51 is constrained from displacement under the action of the tie rod 4, and the outer extension 51 does not bend when the upper row of steel bars 2 bear the conventional construction load.

[0041] In another technical solution, the tie rod 4 includes a rod body 41, two ends of the rod body 41 are coaxially provided with two thread sleeves 42 with opposite threads, a threaded rod 43 is sleeved in the thread sleeves 42 with matching threads, an outer end of the threaded rod 43 is connected with a hook 44, and the hook 44 is clamped on the corresponding outer extension 51, in this technical solution, the rod body 41 is a rectangular ring structure, and the inner teeth of the symmetrically arranged thread sleeves 42 at both ends are opposite, so that after the hooks 44 at both ends hook the outer extensions 51, the rod body 41 can be manually rotated, as shown in Figure 10 (a), in a conventional case, the number of longitudinal reinforcement of the pile core reinforcement cage 7 is 6, and the number of support reinforcement 5 is also 6, three tie rods 4 can be arranged in a triangular shape, the two ends of the tie rod 4 are hooked on three outer extensions 51 that are not adjacent, after clamping, the rod body 4 is rotated one by one to shrink the hooks 44 at both ends to form a pre-tightening force, and further improve the bending resistance of the outer extension 51, and optionally, as shown in Figure 10 (b), two layers of triangularly arranged tie rods 4 are provided, so that each outer extension 51 can form a good pre-tightening and limiting effect.

[0042] In another technical solution, a threaded hole 440 is arranged on the hook 44, and a fastening screw 45 is sleeved in the threaded hole 440, wherein the inner wall of the hook 44 and the end of the fastening screw 45 clamp the corresponding clamped outer extension 51, as shown in Figure 11 The threaded hole 440 can be directly punched and threaded on the hook 44, or a nut can be welded on the hook, and the fastening screw 45 can be matched and screwed into the threaded hole 440, and the end head can be used to press against the outer extension 51 to prevent the tie rod 4 from sliding downward.

[0043] In another technical solution, the number of support reinforcement 5 is not less than 6.

[0044] In another technical solution, the diameter of the support reinforcement 5 is not less than 16 mm.

[0045] The number of components and process steps are illustrative only and not limiting of the present application.

[0046] While this application has been disclosed with reference to the embodiments described above, it is not confined to the details thereof, but is susceptible of various modifications and embodiments, and alternative constructions, as will be readily apparent to those skilled in the art. The present application is therefore not to be limited to the specific embodiments disclosed, but is intended to cover any and all adaptations of the present application within the scope and spirit of the claims, and equivalents thereof.

Claims

1. A floor reinforcement support structure, characterized by, The utility model relates to a pile foundation (3), the pile head of which is exposed to the bottom surface of a foundation pit, a plurality of supporting bars (5) each of which extends upward from the top of the pile head of the pile foundation (3), each of the supporting bars (5) comprising an overhanging section (51) and a supporting section (52) fixedly connected to one end of the overhanging section (51), each of the supporting sections (52) being bent outward to a horizontal state, all of the supporting sections (52) collectively supporting an upper row of steel bars (2), a fastening device in the form of a ring, the fastening device being arranged horizontally, the ring body of the fastening device being fixedly connected to the middle part of all or part of the overhanging sections (51). The pile foundation (3) is a prefabricated pipe pile, a pile core steel bar cage (7) being installed in the pile core of the pile foundation (3), the other end of each of the overhanging sections (51) being one-to-one matchedly connected to a longitudinal bar in the pile core steel bar cage (7), the overhanging sections (51) being arranged obliquely upward outside the pile foundation (3). The angle between the overhanging sections (51) and the horizontal plane is not less than 75°. The pile head of the pile foundation (3) is provided with a horizontal pile foundation end plate (31), one end of the overhanging section (51) being weldedly connected to the pile foundation end plate (31).

2. The floor rebar support structure of claim 1, wherein, The fastening device is at least one layer of tie rods (4) arranged in a polygon horizontally, both ends of the tie rod (4) being detachably connected to two overhanging sections (51), wherein the adjacent ends of any two adjacent tie rods (4) on the same layer are detachably connected to one overhanging section (51).

3. The floor rebar support structure of claim 2, wherein, The tie rod (4) comprises a rod body (41), two thread sleeves (42) coaxially arranged at both ends of the rod body (41) and having opposite threads, a threaded rod (43) being sleeved in the thread sleeves (42) in a matched thread manner, a hook (44) being connected to the outer end of the threaded rod (43), the hook (44) being clamped on the corresponding overhanging section (51).

4. The floor rebar support structure of claim 1, wherein, A threaded hole (440) is arranged on the hook (44), a fastening screw (45) being sleeved in the threaded hole (440), wherein the inner wall of the hook (44) and the end part of the fastening screw (45) clamp the corresponding overhanging section (51).

5. The floor rebar support structure of claim 1, wherein, The number of the supporting bars (5) is not less than 6.

6. The floor rebar support structure of claim 5, wherein, The diameter of the supporting bars (5) is not less than 16 mm.

7. The floor rebar support structure of claim 6, wherein, ​ 8. The floor rebar support structure of claim 1, wherein, ​ 9. The floor rebar support structure of claim 1, wherein, ​

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