Reinforcing steel bar layered supporting structure of ultra-deep large-size raft foundation

Abstract

The utility model relates to a reinforcing steel bar layered supporting structure of an ultra-deep large-size raft foundation, which comprises a limiting connecting piece, an upper supporting arm piece and a lower supporting arm piece are respectively arranged on the limiting connecting piece, a limiting groove is arranged at the top of the upper supporting arm piece, a limiting groove is arranged at the bottom of the lower supporting arm piece, a nut is fixed at the center of the bottom of the upper supporting arm piece, and the limiting groove is arranged in the limiting groove. Nuts are fixed to the center of the top of the lower supporting arm piece, a double-thread screw is arranged in the two nuts in a penetrating mode, and the double-thread screw penetrates through the center of the limiting connecting piece. The limiting connecting piece comprises a fixing plate, a through hole is formed in the center of the fixing plate, clamping springs are arranged at the top and the bottom of the through hole, round sleeves are fixed to the four corners of the fixing plate, and the sleeves on the two diagonal lines are used for being connected with the upper supporting arm piece and the lower supporting arm piece correspondingly. Middle-layer supporting arms are arranged on the outer sides of the sleeves, and limiting grooves are formed in the outer sides of the middle-layer supporting arms; the middle of the double-thread screw is an installation section, the two ends of the double-thread screw are both threaded sections, the thread directions of the two threaded sections are opposite, and the installation section is rotationally connected with the fixing plate through a clamping spring arranged at the through hole of the fixing plate.

Description

Technical Field

[0001] The utility model relates to a steel bar layered support structure for a super-deep large-volume raft foundation, and is applied to the technical field of building support structures. Background Art

[0002] As is well known, in the contemporary construction field, with the continuous emergence of super high-rise buildings, large public buildings and underground space development, the super-deep large-volume raft foundation, as an important part of the building support system, its design and construction are particularly important. For example, in the case of a super-thick raft foundation, due to its large thickness and high construction height of steel bars, in addition to the traditional upper-layer steel bars and lower-layer steel bars, a layer of middle-layer steel bars will also be laid. During construction, a support frame with multi-layer simultaneous support is often erected to construct the steel bars in layers.

[0003] The utility model patent with the publication number of CN204959783U discloses a multi-layer steel bar mesh stool for a large super-thick raft foundation, and specifically discloses an L-shaped stool bar, < -shaped stool legs, a plurality of hanging hooks and a plurality of layers of steel bar meshes. The steel bar mesh includes transverse bars and longitudinal bars. The inflection point of the < -shaped stool legs is welded to the bottom of the L-shaped stool bar to form a chassis. The hanging hooks are arranged on the columns of the L-shaped stool bar. The distance between adjacent two of the hanging hooks is adapted to the distance between adjacent two layers of the steel bar meshes. The transverse bars and the longitudinal bars of the steel bar mesh are installed on the hanging hooks, and the transverse bars, the longitudinal bars and the L-shaped stool bar are bundled and fixed. However, the above structure and the existing multi-layer steel bar support frames all have the problems of thin structure, poor support stability and difficult quality assurance. Another utility model patent with the publication number of CN215858626U discloses a multi-layer steel bar support frame for a super-thick raft foundation, which has a large number of component intakes, a complex structure and a high consumable cost. Therefore, the above are not applicable to the multi-layer steel bar laying and support of a super-thick raft foundation. Summary of the Utility Model

[0004] In order to solve the above technical problems, the utility model provides a steel bar layered support structure for a super-deep large-volume raft foundation. By positioning and supporting each layer of steel bars, it is convenient for the installation of the stool bars for steel bar laying. After the stool bars are installed, the distance between the upper arm member and the lower arm member is shortened by adjusting the double-headed screw, and then the support device is withdrawn from the steel bar rack. This device supports the use between multi-layer steel bar racks, effectively reducing the construction difficulty; and it can be recycled and reused, reducing the construction consumable cost.

[0005] The technical solution of the utility model is as follows:

[0006] A steel bar layered support structure for a super-deep large-volume raft foundation, including a limit connecting piece, on which an upper support arm piece and a lower support arm piece are respectively arranged. A limit groove is arranged at the top of the upper support arm piece, and a limit groove is arranged at the bottom of the lower support arm piece. A nut is fixed at the center of the bottom of the upper support arm piece, and a nut is fixed at the center of the top of the lower support arm piece. A double-headed screw passes through the two nuts, and the double-headed screw passes through the center of the limit connecting piece; the limit connecting piece includes a fixing plate, a through hole is opened at the center of the fixing plate, snap rings are arranged at the top and bottom of the through hole, and circular sleeves are fixed at the four corners of the fixing plate. The sleeves on the two diagonals are respectively used to connect the upper support arm piece and the lower support arm piece; limit grooves are arranged on the outer sides of the sleeves; the middle part of the double-headed screw is an installation section, both ends of the double-headed screw are threaded sections, and the thread directions of the two threaded sections are opposite. The installation section is rotatably connected to the fixing plate through the snap ring arranged at the through hole of the fixing plate.

[0007] The nuts fixed on the upper support arm piece and the lower support arm piece have opposite thread directions and are adapted to the threaded sections of the double-headed screw.

[0008] Both the upper support arm piece and the lower support arm piece are in a "J" shape structure. The opening of the upper support arm piece faces upward, and the opening of the lower support arm piece faces downward. The upper support arm piece and the lower support arm piece are arranged alternately, and the bottom rod of the upper support arm piece and the top rod of the lower support arm piece are in a vertical structure.

[0009] Limit grooves are symmetrically arranged on both sides of the top of the upper support arm piece, and limit grooves are symmetrically arranged on both sides of the bottom of the lower support arm piece. The feet of the upper support arm piece face upward, and its limit groove is in contact with the upper layer of steel bar support. The feet of the lower support arm piece face downward, and its limit groove is in contact with the lower layer of steel bar support.

[0010] The limit groove on the middle support arm is in contact with the middle layer of steel bar support.

[0011] The fixing plate is in a square structure, and the fixing plate is slidably connected to the upper support arm piece and the lower support arm piece respectively through the sleeves.

[0012] The sizes of the limit grooves arranged on the upper support arm piece, the lower support arm piece and the middle support arm are respectively adapted to the diameters of the steel bars of the corresponding raft foundation.

[0013] The utility model has the following beneficial effects:

[0014] 1. The device of the present utility model is not used as a traditional steel bar support structure, but as a temporary support. During the steel bar laying stage, by positioning and supporting each layer of steel bars, it facilitates the installation of the supporting stools for the steel bars. After the supporting stools are installed, the distance between the upper support arm and the lower support arm is shortened by adjusting the double-headed screw, and then the support device is withdrawn from the steel bar rack. This device can be used between multiple layers of steel bar racks, effectively reducing the construction difficulty; and it can be recycled and reused, reducing the cost of construction consumables;

[0015] 2. The present utility model includes an upper support arm and a lower support arm that are orthogonally connected in a staggered manner, which is a three-dimensional structure. With the structural design of each limiting groove, it has strong supporting force and good stability; the device adjusts the distance between the upper support arm and the lower support arm by setting a double-headed screw, always taking the middle limiting connecting piece as the adjustment midpoint, and can ensure that the distance between the upper and lower layers of steel bars and the middle layer of steel bars is consistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 is a schematic diagram of the usage state of the present utility model;

[0018] The reference numerals in the drawings are shown as:

[0019] 1. Upper support arm; 2. Lower support arm; 3. Limiting connecting piece; 31. Sleeve; 32. Fixed plate; 4. Middle layer support arm; 5. Double-headed screw; 51. Installation section; 52. Thread section; 6. Nut; 7. Snap ring; 8. Limiting groove; 9. Upper layer steel bar; 10. Middle layer steel bar; 11. Lower layer steel bar; 12. Supporting stool. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The present utility model will be described in detail below with reference to the drawings and specific embodiments.

[0021] See Figures 1 to 2The described steel bar layered support structure for a super-deep and large-volume raft foundation includes a limit connecting piece 3. An upper support arm piece 1 and a lower support arm piece 2 are respectively arranged on the limit connecting piece 3. A limit groove 8 is arranged at the top of the upper support arm piece 1, and a limit groove 8 is arranged at the bottom of the lower support arm piece 2. A nut 6 is fixed at the center of the bottom of the upper support arm piece 1, and a nut 6 is fixed at the center of the top of the lower support arm piece 2. A double-headed screw rod 5 passes through the two nuts 6, and the double-headed screw rod 5 passes through the center of the limit connecting piece 3; the limit connecting piece 3 includes a fixing plate 32. A through hole is opened at the center of the fixing plate 32. Snap rings 7 are arranged at the top and bottom of the through hole. Circular sleeves 31 are fixed at the four corners of the fixing plate 32. The sleeves 31 on the two diagonals are respectively used to connect the upper support arm piece 1 and the lower support arm piece 2; A middle support arm 4 is arranged on the outer side of each sleeve 31, and a limit groove 8 is arranged on the outer side of the middle support arm 4; The middle part of the double-headed screw rod 5 is an installation section 51, and both ends of the double-headed screw rod 5 are threaded sections 52. The thread directions of the two threaded sections 52 are opposite. The installation section 51 is rotatably connected to the fixing plate 32 through the snap ring 7 arranged at the through hole of the fixing plate 32.

[0022] The nuts 6 fixed on the upper support arm piece 1 and the lower support arm piece 2 have opposite thread directions and are adapted to the threaded sections 52 of the double-headed screw rod 5. The nut 6 is used for screwing with the double-headed screw rod 5 to realize the adjustment of the height distance between the upper support arm piece 1 and the lower support arm piece 2.

[0023] Both the upper support arm piece 1 and the lower support arm piece 2 are in a "J" shape structure. The opening of the upper support arm piece 1 faces upward, and the opening of the lower support arm piece 2 faces downward. The upper support arm piece 1 and the lower support arm piece 2 are arranged alternately. The bottom rod of the upper support arm piece 1 and the top rod of the lower support arm piece 2 are arranged in a vertical structure.

[0024] Limit grooves 8 are symmetrically arranged on both sides of the top of the upper support arm piece 1, and limit grooves 8 are symmetrically arranged on both sides of the bottom of the lower support arm piece 2. The feet of the upper support arm piece 1 face upward, and its limit groove 8 is in supporting contact with the upper layer of steel bars 9. The feet of the lower support arm piece 2 face downward, and its limit groove 8 is in supporting contact with the lower layer of steel bars 11.

[0025] The limit groove 8 on the middle support arm 4 is in supporting contact with the middle layer of steel bars 10.

[0026] The fixing plate 32 is in a square structure. The fixing plate 32 is respectively slidably connected to the upper support arm piece 1 and the lower support arm piece 2 through the sleeves 31.

[0027] The sizes of the limit grooves 8 arranged on the upper support arm piece 1, the lower support arm piece 2 and the middle support arm 4 are respectively adapted to the diameters of the corresponding steel bars of the raft foundation. During use, the limit grooves 8 can play a positioning role by engaging with the steel bars.

[0028] The threaded sections 52 at both ends of the double-headed screw 5 are respectively screwed with two nuts 6 on the upper support arm member 1 and the lower support arm member 2. When the double-headed screw 5 rotates, the two nuts 6 approach or move away from each other. Furthermore, the misalignment of the upper support arm member 1 and the lower support arm member 2 can be controlled by rotating the double-headed screw 5, thereby controlling the support height of the entire device to be applicable to the laying of different multi-layer steel bar spacings.

[0029] Working principle of the present utility model:

[0030] When using the present utility model, first lay the lower layer of steel bars 11, then install and set the designed spacing of each layer of steel bars. By rotating the double-headed screw 5, adjust the height of the upper support arm member 1 and the lower support arm member 2 and the support spacing between the two. When the double-headed screw 5 is rotated forward, the upper support arm member 1 and the lower support arm member 2 approach each other. When the double-headed screw 5 is rotated backward, the upper support arm member 1 and the lower support arm member 2 move away from each other. After the support spacing is adjusted to an appropriate distance, then place this device on the lower layer of steel bars 11, so that the lower layer of steel bars 11 abuts against the limit groove 8 on the lower support arm member 2, and lay the middle layer of steel bars 10 and the upper layer of steel bars 9 on this support device respectively. The middle layer of steel bars 10 is supported by the limit groove 8 provided on the middle support arm 4, and the upper layer of steel bars 9 is supported by the limit groove 8 on the upper support arm member 1; after all the steel bars are laid, place the stirrup bars 12 between the lower layer of steel bars 11 and the middle layer of steel bars 10, and between the middle layer of steel bars 10 and the upper layer of steel bars 9, and weld and fix the feet of the stirrup bars 12 to the steel bar framework. After the top of the stirrup bars 12 is tied and fixed to the steel bar framework, shorten the distance between the upper support arm member 1 and the lower support arm member 2 by adjusting the double-headed screw 5, and then remove this support structure and replace it with the stirrup bars 12 to support and fix the steel bar framework, which not only saves costs but also ensures the stability of the steel bar framework.

[0031] The above are only the embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be similarly included within the patent protection scope of the present utility model.

Claims

1. A reinforced layered support structure for an ultra-deep and large-volume raft foundation, characterized in that: The invention comprises a limit connecting member (3), wherein an upper arm member (1) and a lower arm member (2) are respectively arranged on the limit connecting member (3), a limit groove (8) is arranged at the top of the upper arm member (1), and a limit groove (8) is arranged at the bottom of the lower arm member (2), a nut (6) is fixed at the center of the bottom of the upper arm member (1), and a nut (6) is fixed at the center of the top of the lower arm member (2), a double-headed screw (5) is passed through the two nuts (6), and the double-headed screw (5) passes through the center of the limit connecting member (3); the limit connecting member (3) comprises a fixing plate (32), a through hole is opened at the center of the fixing plate (32), and the top and bottom of the through hole are A retaining spring (7) is provided, and circular sleeves (31) are fixed at the four corners of the fixing plate (32), and the sleeves (31) on the two diagonal lines are respectively used to connect the upper support arm (1) and the lower support arm (2); a middle support arm (4) is provided on the outer side of the sleeve (31), and a limiting groove (8) is provided on the outer side of the middle support arm (4); the middle part of the double-headed screw (5) is a mounting section (51), and both ends of the double-headed screw (5) are threaded sections (52), and the thread directions of the two threaded sections (52) are opposite. The mounting section (51) is rotatably connected to the fixing plate (32) through a retaining spring (7) provided at the through hole of the fixing plate (32).

2. The steel layered support structure for an ultra-deep and large-volume raft foundation according to claim 1, characterized in that: The nuts (6) fixed on the upper support arm (1) and the lower support arm (2) have opposite thread directions and are compatible with the threaded section (52) of the double-headed screw (5).

3. The steel layered support structure for an ultra-deep and large-volume raft foundation according to claim 1, characterized in that: The upper arm member (1) and the lower arm member (2) are both of "J"-shaped structure, the opening of the upper arm member (1) faces upward, and the opening of the lower arm member (2) faces downward, the upper arm member (1) and the lower arm member (2) are arranged in a staggered manner, and the bottom rod of the upper arm member (1) and the top rod of the lower arm member (2) are arranged in a vertical structure.

4. The steel layered support structure for an ultra-deep and large-volume raft foundation according to claim 1, characterized in that: The upper arm member (1) has limit grooves (8) symmetrically arranged on both sides of the top, and the lower arm member (2) has limit grooves (8) symmetrically arranged on both sides of the bottom. The upper arm member (1) has its support legs facing upwards, and its limit grooves (8) are in support contact with the upper steel bars (9). The lower arm member (2) has its support legs facing downwards, and its limit grooves (8) are in support contact with the lower steel bars (11).

5. The steel layered support structure for an ultra-deep and large-volume raft foundation according to claim 1, characterized in that: The limiting groove (8) on the middle-layer support arm (4) is in supporting contact with the middle-layer steel bars (10).

6. The steel bar layered support structure of the ultra-deep and large-volume raft foundation according to claim 1, characterized in that: The fixing plate (32) is a square structure, and the fixing plate (32) is respectively slidably connected with the upper supporting arm member (1) and the lower supporting arm member (2) through the sleeve (31).

7. The steel bar layered support structure of the ultra-deep and large-volume raft foundation according to claim 1, characterized in that: The sizes of the limiting grooves (8) provided on the upper supporting arm member (1), the lower supporting arm member (2) and the middle supporting arm (4) are respectively adapted to the diameters of the steel bars of the corresponding raft foundations.

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