Supporting-free steel bar formwork reinforcing device for deep foundation pit concrete inner supporting beam

Abstract

The utility model relates to a supporting-free steel bar formwork reinforcing device for a deep foundation pit concrete inner supporting beam. The supporting-free steel bar formwork reinforcing device comprises in-beam steel bars. The templates comprise a left template and a right template, and the left template and the right template are arranged on the left side and the right side of the in-beam steel bar respectively; the lower end of the limiting piece is fixed in the concrete cushion layer, and the limiting piece is arranged on the inner side of the formwork and matched with the inner side of the formwork in a stopping mode. The steel pipes are arranged at intervals relative to the formwork and comprise the left steel pipe and the right steel pipe, and supporting structures are arranged between the steel pipes and the formwork. The split bolts extend in the left-right direction, penetrate through the left formwork and the right formwork and fix the left steel pipe and the right steel pipe. The positioning piece is correspondingly arranged below the steel pipe and is in insertion fit relative to the steel pipe; the length of the fastening tool is adjustable in the left-right direction, the fastening tool is arranged above the inner supporting beam, and the fastening tool forms a fastening structure which is inwards and oppositely pulled relative to the upper end of the left steel pipe and the upper end of the right steel pipe; the use amount of steel bars is saved, and the use amount of split bolts can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of deep foundation pit concrete inner support beam construction, in particular to a deep foundation pit concrete inner support beam support-free steel bar template reinforcement device. Background Art

[0002] With the continuous development and utilization of urban underground space, various large-scale deep foundation pits are increasing, such as underground parking lots, underground stations, etc. During the foundation pit excavation process, especially in areas with thick silt layers, reinforced concrete internal support beams are usually set up to ensure the safety of the foundation pit.

[0003] The template reinforcement device for supporting beams in deep foundation pits in the prior art is as follows Figure 1 As shown, it mainly includes wooden formwork 1, back ribs, steel pipes 4 and other components. A steel bar segment 2 is implanted on the concrete cushion layer. The steel bar segment 2 is arranged inside the lower end of the formwork to form a stop for the lower end of the formwork to prevent the lower part of the formwork from sinking inward. In addition, three layers of tension bolts 5 are usually arranged in the upper, middle and lower directions of the formwork to fasten the steel pipe 4. In order to prevent the upper and middle parts of the formwork from sinking inward, ordinary threaded steel bars are usually used as internal support steel bars 3 and placed in the beam formwork to support the wooden formworks 1 on both sides through the internal support steel bars 3. When pouring the concrete of the internal support beam, the support steel bars 3 will be buried in the concrete together, which is not beneficial to the stress of the structure and cannot be reused, resulting in a waste of steel bars on site. At the same time, the amount of tension screws used is too large, and holes will be left after the tension screws are removed and need to be sealed. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a deep foundation pit concrete inner support beam free support steel bar formwork reinforcement device to solve the technical problem of large amount of support steel bars and tension bolts causing material waste during the construction of the inner support beam in the prior art.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model of a deep foundation pit concrete inner support beam support-free steel bar formwork reinforcement device is:

[0006] A deep foundation pit concrete inner support beam support-free steel bar formwork reinforcement device, comprising:

[0007] Steel bars inside the beam: used to reinforce the inner support beam. Steel bars inside the beam are used to be set above the concrete cushion layer.

[0008] Formwork: including a left formwork and a right formwork, which are respectively arranged on the left and right sides of the steel bars in the beam to form a pouring space for the inner support beam between the left formwork and the right formwork;

[0009] Limiting piece: The lower end of the limiting piece is fixed in the concrete cushion layer, and the limiting piece is arranged on the inner side of the formwork and cooperates with the inner side stop of the formwork;

[0010] Steel pipe: It is set at intervals relative to the template, including the left steel pipe and the right steel pipe, and a supporting structure is set between the steel pipe and the template;

[0011] Tension bolts: extended in the left and right directions, and the tension bolts penetrate the left formwork and the right formwork;

[0012] Positioning piece: It is arranged below the steel pipe and is plugged into the steel pipe. The lower end of the positioning piece is fixed in the concrete cushion layer.

[0013] Fastening tool: The length is adjustable in the left and right directions. The fastening tool is arranged above the inner support beam. The fastening tool forms a fastening structure that pulls inward relative to the upper ends of the left and right steel pipes.

[0014] Beneficial effects: In the utility model, a positioning piece is correspondingly arranged at the lower end of the steel pipe, and the positioning piece can position the lower end of the steel pipe to prevent the lower end of the steel pipe from moving away from the template, thereby replacing the tension bolts arranged at the lower end of the steel pipe to limit the outward displacement of the steel pipe and the template; a fastening tool is arranged at the upper end of the steel pipe, and the setting of the fastening tool can limit the distance between the left template and the right template to prevent the upper ends of the left template and the right template from moving outward. The setting of the positioning piece and the fastening tool can avoid the use of supporting steel bars, thereby saving the use of steel bars, and can also reduce the use of tension bolts, avoiding the subsequent blocking of holes left by more tension bolts.

[0015] Furthermore, the positioning member is a positioning steel bar whose lower end is fixed in the concrete cushion layer, and the positioning steel bar is plug-fitted with the lower end of the steel pipe.

[0016] Beneficial effect: The positioning piece has a simple structure and is easy to install compared to a steel pipe.

[0017] The fastening tool includes a first rod segment and a second rod segment. One end of the first rod segment facing the second rod segment is threadedly adapted to one end of the second rod segment facing the first rod segment, so as to adjust the length of the fastening tool in the left and right directions. One end of the first rod segment away from the second rod segment is provided with a movable plug-in structure adapted to the upper end of the steel pipe; one end of the second rod segment away from the first rod segment is vertically fixed with a clamp body, and the clamp body is plug-fitted with the upper end of the steel pipe.

[0018] Beneficial effect: The length of the fastening tool can be conveniently adjusted through the threaded adaptation between the first rod segment and the second rod segment.

[0019] An end of the first rod segment facing the second rod segment is provided with an external thread segment, and an end of the second rod segment facing the first rod segment is provided with an internal thread sleeve threadably matched with the external thread segment.

[0020] Beneficial effect: The first rod segment and the second rod segment have simple structures and are easy to process and manufacture.

[0021] The movable plug-in structure includes a plug-in hole opened at one end of the first rod section away from the second rod section. There are two plug-in holes, which are arranged vertically at 90 degrees. The movable plug-in structure also includes a pin that is plug-fitted with the plug-in hole, and the lower end of the pin is plug-fitted with the upper end of the steel pipe.

[0022] Beneficial effects: The movable plug-in structure has simple structure setting, convenient plug-in and strong plug-in stability.

[0023] The latch includes a blocking portion at the upper end and a plug-in portion at the lower end, the side of the plug-in portion facing the template is a vertical side extending in the up-down direction, and the side of the plug-in portion away from the template is an inclined side gradually approaching the template from top to bottom, so that the plug-in portion forms a structure with a large upper end and a small lower end.

[0024] Beneficial effect: The length of the fastening tool between the left steel pipe and the right steel pipe can be finely adjusted through the cooperation of the plug and the plug hole.

[0025] The clamp body and the second rod segment are integrally formed.

[0026] Beneficial effect: The connection strength between the clamp body and the second rod section is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a conventional reinforcement device for a beam formwork in the prior art;

[0028] Figure 2 It is a structural schematic diagram of a support-free steel bar formwork reinforcement device for a deep foundation pit concrete inner support beam of the utility model;

[0029] Figure 3 yes Figure 2 A schematic diagram of the structure of the fastening tool;

[0030] Figure 4 yes Figure 3 AA section view in;

[0031] Figure 5 yes Figure 3 BB section view in;

[0032] Figure 6 yes Figure 3 A front view of the latch in FIG.

[0033] Figure 7 yes Figure 3 Side view of the latch in FIG.

[0034] Figure numerals: 1-wooden formwork; 2-steel bar segment; 3-supporting steel bar; 4-steel pipe; 5-tension bolt; 6-limiting steel bar segment; 7-steel bar in beam; 8-formwork; 9-positioning block; 10-back rib; 11-steel pipe; 12-positioning steel bar; 13-tension bolt; 14-first rod segment; 15-second rod segment; 16-latch pin; 17-plug-in hole; 18-externally threaded segment; 19-internally threaded sleeve; 20-clamp body; 21-sealing part; 22-plug-in part. DETAILED DESCRIPTION

[0035] The following is a further detailed description of a deep foundation pit concrete inner support beam free support steel bar formwork reinforcement device of the utility model in conjunction with the accompanying drawings and specific embodiments:

[0036] like Figure 2-Figure 7 As shown, the utility model is a deep foundation pit concrete inner support beam without supporting steel bar formwork reinforcement device, which is convenient to use when pouring the inner support beam; the inner support beam is arranged above the concrete cushion layer; the inner support beam reinforcement device includes an inner beam steel bar 7 arranged inside the inner support beam, and the inner beam steel bar 7 is used to form the inner support beam after pouring concrete, so as to reinforce the inner support beam, and the inner beam steel bar 7 is arranged above the concrete cushion layer.

[0037] A left template and a right template are respectively arranged on the left and right sides of the steel bar 7 in the beam. In this embodiment, the left template is spaced apart from the left side of the steel bar 7 in the beam, and the right template is spaced apart from the right side of the steel bar 7 in the beam. In order to ensure the distance between the left template and the right template and the steel bar 7 in the beam, a positioning block 9 is fixed between the left template and the left side of the steel bar 7 in the beam, and a positioning block 9 is fixed between the right template and the right side of the steel bar 7 in the beam. The left template and the right template are respectively arranged on the left and right sides of the steel bar 7 in the beam to form a casting space for the inner support beam between the left template and the right template.

[0038] A limiting member is provided on the inner side of the formwork. In the present embodiment, the limiting member is a limiting steel bar segment 6. The lower end of the limiting steel bar segment 6 is fixed in the concrete cushion layer. The limiting steel bar segment 6 is provided on the inner side of the formwork and cooperates with the inner stopper of the formwork, thereby preventing the lower ends of the left formwork and the right formwork from being sunken inwards.

[0039] A steel pipe 11 is arranged outside the template 8, and the steel pipe 11 is arranged at intervals relative to the template 8. In this embodiment, the steel pipe 11 includes a left steel pipe and a right steel pipe, and the left steel pipe and the right steel pipe are both extended in the up-down direction. A supporting structure is arranged between the steel pipe 11 and the template 8. In this embodiment, the supporting structure is a back rib 10. In this embodiment, the left steel pipe is arranged at intervals on the left side of the left template, and the right steel pipe is arranged at intervals on the right side of the right template.

[0040] Tension bolts 13 are arranged at intervals in the vertical direction of the steel pipe 11, and the tension bolts 13 extend in the left-right direction, and the tension bolts 13 penetrate the left template and the right template, and fix the left steel pipe and the right steel pipe. In this embodiment, two tension bolts 13 are arranged at intervals in the vertical direction.

[0041] A positioning piece is provided below the steel pipe 11, and the positioning piece is plugged into the steel pipe 11. The lower end of the positioning piece is fixed in the concrete cushion. In this embodiment, the positioning piece is a positioning steel bar 12 whose lower end is fixed in the concrete cushion. The positioning steel bar 12 is plugged into the lower end of the steel pipe 11. The positioning piece can replace the bottom tension bolt 13 to limit the outward displacement of the template 8 and the steel pipe 11.

[0042] A fastening tool is arranged at intervals above the inner support beam, and the length of the fastening tool in the left-right direction is adjustable to form a fastening structure that pulls the upper ends of the left and right steel pipes inward. In this embodiment, the fastening tool includes a first rod segment 14 and a second rod segment 15, and one end of the first rod segment 14 facing the second rod segment 15 is threadedly adapted to one end of the second rod segment 15 facing the first rod segment 14, so as to facilitate the adjustment of the length of the fastening tool in the left-right direction, and one end of the first rod segment 14 facing the second rod segment 15 is provided with an external thread segment 18, and one end of the second rod segment 15 facing the first rod segment 14 is provided with an internal thread sleeve 19 threadedly adapted to the external thread segment 18; that is, the right side of the first rod segment 14 is provided with an external thread segment 18, and the left side of the second rod segment 15 is provided with an internal thread sleeve 19, and the external thread segment 18 and the internal thread sleeve 19 are threadedly adapted to facilitate the adjustment of the length of the fastening tool formed by the first rod segment 14 and the second rod segment 15 in the left-right direction. In this embodiment, the first rod section 14 and the second rod section 15 of the fastening tool are both made of aluminum alloy.

[0043] An end of the first rod segment 14 away from the second rod segment 15 is provided with a movable plug structure adapted to the upper end of the steel pipe 11, that is, the right end of the first rod segment 14 is provided with a movable plug structure; the movable plug structure includes a plug hole 17 opened at the end of the first rod segment 14 away from the second rod segment 15, and there are two plug holes 17, which are arranged vertically at 90°, and the two plug holes 17 both penetrate the first rod segment 14 radially, so that when the first rod segment 14 rotates 90°, one plug hole 17 faces upward.

[0044] The movable plug-in structure also includes a plug pin 16 plugged and matched with the plug hole 17, and the lower end of the plug pin 16 plugs and matches with the upper end of the steel pipe 11. In this embodiment, the plug pin 16 includes a blocking portion 21 at the upper end and a plug-in portion 22 at the lower end. The side of the plug-in portion 22 facing the template 8 is a vertical side extending in the up-down direction, and the side of the plug-in portion 22 away from the template 8 is an inclined side gradually approaching the template 8 from top to bottom, so that the plug-in portion 22 forms a structure with a large upper end and a small lower end. When the plug pin 16 is inserted into the upper end of the steel pipe 11, the vertical side of the plug pin 16 is blocked and matched with the inner wall surface of the steel pipe 11.

[0045] In order to prevent the latch 16 from being lost, in this embodiment, the latch 16 is connected to the right end of the first rod section 14 by a steel wire rope.

[0046] A clamp body 20 is vertically fixed to one end of the second rod segment 15 away from the first rod segment 14, and the clamp body 20 is plugged into the upper end of the steel pipe 11, so that the right end of the fastening tool is hooked with the steel pipe 11. In order to ensure the connection stability between the clamp body 20 and the second rod segment 15, in this embodiment, the clamp body 20 and the second rod segment 15 are integrally formed.

[0047] When the utility model is used, the limiting steel bar segment 6 is fixed on the concrete cushion layer to limit the lower ends of the left and right templates to prevent the lower ends of the left and right templates from sinking inwards, and then the positioning steel bar 12 is implanted in the concrete cushion layer according to the erection point of the steel pipe 11, and the positioning steel bar 12 is inserted into the lower end of the beam template steel pipe to fix it, and the clamp body 20 at the right end of the fastening tool is inserted into the upper end of the right steel pipe, and the first rod segment 14 is rotated relative to the second rod segment 15 to adjust the length of the fastening tool. After the length is adjusted to a suitable position, ensure that the plug hole 17 is aligned with the upper end of the left steel pipe, and insert the pin 16 from the plug hole 17 into the upper end of the left steel pipe, so that the steel pipes 11 on both sides can be fastened by the fastening tool. In addition, the fastening tool will not be buried by concrete during pouring. After the inner support beam is poured, the fastening tool can be removed with the template 8 and transferred to the next place for use.

[0048] In the present invention, by using fastening tools and positioning pieces to reinforce the template 8 and the steel pipe 11, the supporting steel bars fixed between the left template and the right template in the conventional system can be eliminated, and a set of tension bolts 13 can be reduced at the lower end of the steel pipe 11. Therefore, the use of supporting steel bars and tension bolts 13 can be saved during the casting of the inner support beam, reducing the material cost.

[0049] In the above embodiments, the positioning member is a positioning steel bar whose lower end is fixed in the concrete cushion layer, and the positioning steel bar is plugged into and matched with the lower end of the steel pipe; in other embodiments, the positioning member can also be other positioning support sections.

[0050] In the above embodiment, an external threaded section is provided at one end of the first rod segment facing the second rod segment, and an internal threaded sleeve is provided at one end of the second rod segment facing the first rod segment, which is threadably matched with the external threaded section; in other embodiments, the fastening tool includes a first rod segment, a second rod segment, and a sleeve threadably matched with the first rod segment and the second rod segment, respectively, the sleeve is provided between the first rod segment and the second rod segment, an external threaded section is provided at one end of the first rod segment facing the sleeve, and an external threaded section is provided at one end of the second rod segment facing the sleeve, and the external threaded section of the first rod segment and the external threaded section of the second rod segment are threadably matched with the sleeve, respectively.

[0051] In the above embodiments, the clamp body and the second rod segment are integrally formed; in other embodiments, the clamp body and the second rod segment are connected by welding.

[0052] In the above embodiment, two plug holes are provided, and the two plug holes are vertically arranged at 90 degrees. In other embodiments, one plug hole may be provided.

Claims

1. A deep foundation pit concrete inner support beam free support steel bar formwork reinforcement device, characterized in that: include: Steel bars inside the beam: used to reinforce the inner support beam. Steel bars inside the beam are used to be set above the concrete cushion layer. Formwork: including a left formwork and a right formwork, which are respectively arranged on the left and right sides of the steel bars in the beam to form a pouring space for the inner support beam between the left formwork and the right formwork; Limiting piece: The lower end of the limiting piece is fixed in the concrete cushion layer, and the limiting piece is arranged on the inner side of the formwork and cooperates with the inner side stop of the formwork; Steel pipe: It is set at intervals relative to the template, including the left steel pipe and the right steel pipe, and a supporting structure is set between the steel pipe and the template; Tension bolts: Extended in the left and right directions, the tension bolts penetrate the left formwork and the right formwork, and fix the left steel pipe and the right steel pipe; Positioning piece: It is arranged below the steel pipe and is plugged into the steel pipe. The lower end of the positioning piece is fixed in the concrete cushion layer. Fastening tool: The length is adjustable in the left and right directions. The fastening tool is arranged above the inner support beam. The fastening tool forms a fastening structure that pulls inward relative to the upper ends of the left and right steel pipes.

2. A deep foundation pit concrete inner support beam support-free steel bar formwork reinforcement device according to claim 1, characterized in that: The positioning piece is a positioning steel bar whose lower end is fixed in the concrete cushion layer, and the positioning steel bar is plug-fitted with the lower end of the steel pipe.

3. A deep foundation pit concrete inner support beam support-free steel bar formwork reinforcement device according to claim 1 or 2, characterized in that: The fastening tool includes a first rod segment and a second rod segment. One end of the first rod segment facing the second rod segment is threadedly adapted to one end of the second rod segment facing the first rod segment, so as to adjust the length of the fastening tool in the left and right directions. One end of the first rod segment away from the second rod segment is provided with a movable plug-in structure adapted to the upper end of the steel pipe; one end of the second rod segment away from the first rod segment is vertically fixed with a clamp body, and the clamp body is plug-fitted with the upper end of the steel pipe.

4. A deep foundation pit concrete inner support beam support-free steel bar formwork reinforcement device according to claim 3, characterized in that: An end of the first rod segment facing the second rod segment is provided with an external thread segment, and an end of the second rod segment facing the first rod segment is provided with an internal thread sleeve threadably matched with the external thread segment.

5. A deep foundation pit concrete inner support beam support-free steel bar formwork reinforcement device according to claim 4, characterized in that: The movable plug-in structure includes a plug-in hole opened at one end of the first rod section away from the second rod section. There are two plug-in holes, which are arranged vertically at 90 degrees. The movable plug-in structure also includes a pin that is plug-fitted with the plug-in hole, and the lower end of the pin is plug-fitted with the upper end of the steel pipe.

6. A deep foundation pit concrete inner support beam support-free steel bar formwork reinforcement device according to claim 5, characterized in that: The latch includes a blocking portion at the upper end and a plug-in portion at the lower end, the side of the plug-in portion facing the template is a vertical side extending in the up-down direction, and the side of the plug-in portion away from the template is an inclined side gradually approaching the template from top to bottom, so that the plug-in portion forms a structure with a large upper end and a small lower end.

7. A deep foundation pit concrete inner support beam support-free steel bar formwork reinforcement device according to claim 3, characterized in that: The clamp body and the second rod segment are integrally formed.

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