Civil air defense wall secondary pouring formwork reinforcing structure in full reverse construction method

Abstract

The utility model provides a civil air defense wall secondary pouring formwork reinforcing structure in a full reverse building method, which comprises a primary beam, a civil air defense door arranged below the primary beam, a secondary pouring formwork assembly arranged between the primary beam and the civil air defense door, a vertical pouring hole reserved in the primary beam, and located above the secondary pouring formwork assembly. The civil air defense door is provided with a formwork supporting assembly used for supporting the secondary pouring formwork assembly. The structure can play a role in effective supporting, ensures the safety of a template system, reduces the construction difficulty, and is beneficial to improving the construction quality of the structure.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, and particularly relates to a formwork reinforcement structure for the secondary casting of civil air defense walls in the full top-down method. Background Technique

[0002] In top-down construction, after the retaining structure and engineering piles are completed, instead of large-scale excavation, the top slab of the underground structure is directly constructed, or the top slab of the underground structure and the intermediate columns are constructed after excavating a certain depth, and then the excavation of each layer below the ground is carried out layer by layer in turn, and the construction of each floor slab is carried out alternately. Each time, the excavation of the lower layer of soil is carried out only after the construction of the current floor slab is completed.

[0003] In full top-down construction, the columns, walls and beams of the civil air defense structure need to be formwork-supported and reinforced after the raft slab construction is completed. Affected by the structural form in parts such as the lintel beam, higher requirements are imposed on the stability of the formwork reinforcement, and at the same time, consideration also needs to be given to how to facilitate concrete pouring. The traditional reinforcement structures in the existing technology at present cannot meet the above requirements simultaneously. Summary of the Invention

[0004] In order to overcome the deficiencies of the existing technology, the utility model provides a formwork reinforcement structure for the secondary casting of civil air defense walls in the full top-down method, which can effectively support, ensure the safety of the formwork system, reduce the construction difficulty, and is beneficial to improving the construction quality of the structure.

[0005] To achieve the above object, the formwork reinforcement structure for the secondary casting of civil air defense walls in the full top-down method of the utility model includes a primary beam, a civil air defense door is arranged below the primary beam, a secondary casting formwork assembly is arranged between the primary beam and the civil air defense door, a vertical casting hole is reserved in the primary beam, the vertical casting hole is located above the secondary casting formwork assembly, and a formwork support assembly for supporting the secondary casting formwork assembly is arranged on the civil air defense door.

[0006] Further, the secondary casting formwork assembly includes bottom formworks which are arranged in parallel. First vertical formworks and second vertical formworks are respectively arranged at both ends of the bottom formworks. The first vertical formworks and the second vertical formworks are vertically arranged, and a first water-stop tie rod is arranged between the first vertical formworks and the second vertical formworks.

[0007] Further, a first horizontal formwork is arranged at the top of the second vertical formwork. The first horizontal formwork is horizontally arranged and is arranged on the side of the second vertical formwork away from the first vertical formwork. A third vertical formwork is arranged at one end of the first horizontal formwork away from the first vertical formwork. The third vertical formwork is vertically arranged, and a second water-stop tie rod is arranged between the first vertical formwork and the third vertical formwork.

[0008] Further, a second horizontal formwork is provided at the top of the third vertical formwork. The second horizontal formwork is horizontally arranged and is disposed on the side of the third vertical formwork close to the first vertical formwork. A fourth vertical formwork is provided on the side of the second horizontal formwork close to the first vertical formwork. The fourth vertical formwork is vertically arranged and extends upward. A diagonal bracing plate is further provided between the second horizontal formwork and the fourth vertical formwork.

[0009] Further, a protruding portion is provided at the bottom of the primary beam. The vertical pouring hole passes through the protruding portion. The fourth vertical formwork is attached to the side of the protruding portion. The width of the bottom formwork is the same as the width of the longitudinal beam. The height of the first vertical formwork is the sum of the heights of the second vertical formwork and the third vertical formwork. The width of the first horizontal formwork is the same as the width of the second horizontal formwork.

[0010] Further, a dustpan opening is provided at the top of the first vertical formwork. The dustpan opening includes an inclined guide plate that extends obliquely upward away from the fourth vertical formwork. A vertical guide plate is provided at the top of the inclined guide plate. The vertical guide plate is vertically arranged, and there is a gap between the top of the vertical guide plate and the bottom of the primary beam.

[0011] Further, a first double-steel pipe keel is provided at the bottom of the first horizontal formwork, and a second double-steel pipe keel is provided at the bottom of the second horizontal formwork. The formwork support assembly includes a horizontal formwork support provided on the air defense door. The horizontal formwork support is provided with a first vertical formwork support and a second vertical formwork support. The first vertical formwork support is supported at the bottom of the first double-steel pipe keel, and the second vertical formwork support is supported at the bottom of the second double-steel pipe keel.

[0012] The utility model solves the problem of the formwork reinforcement structure for the secondary concrete pouring of the air defense structure in the top-down construction, can effectively support, ensure the safety of the formwork system, reduce the construction difficulty, and is beneficial to improving the construction quality of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The following further describes and elaborates the utility model with reference to the drawings.

[0014] Figure 1 is a schematic diagram of the formwork reinforcement structure for the secondary pouring of the air defense wall in the full top-down construction of the preferred embodiment of the utility model.

[0015] Reference numerals: 1, primary beam; 11, vertical pouring hole; 12, protruding portion; 2, air defense door; 31, bottom formwork; 32, first vertical formwork; 33, second vertical formwork; 34, first horizontal formwork; 35, third vertical formwork; 36, second horizontal formwork; 37, fourth vertical formwork; 38, diagonal bracing plate; 41, first water-stop tie rod; 42, second water-stop tie rod; 51, inclined guide plate; 52, vertical guide plate; 61, first double-steel pipe keel; 62, second double-steel pipe keel; 63, horizontal formwork support; 64, first vertical formwork support; 65, second vertical formwork support. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The technical solution of the present utility model will be more clearly and completely elaborated below in conjunction with the drawings and through the description of the preferred embodiments of the present utility model.

[0017] As Figure 1 shown, the secondary pouring formwork reinforcement structure of the civil air defense wall in the full inverse construction method of the preferred embodiment of the present utility model includes a primary beam 1, and a civil air defense door 2 is arranged below the primary beam 1. A vertical pouring hole 11 is reserved in the primary beam 1, and a protruding part 12 is arranged at the bottom of the primary beam 1. The vertical pouring hole 11 passes through the protruding part 12.

[0018] A secondary pouring formwork assembly is arranged between the primary beam 1 and the civil air defense door 2. The secondary pouring formwork assembly includes a bottom formwork 31, the bottom formwork 31 is arranged in parallel, and a first vertical formwork 32 and a second vertical formwork 33 are respectively arranged at both ends of the bottom formwork 31. The first vertical formwork 32 and the second vertical formwork 33 are vertically arranged, and a first water-stop tie rod 41 is arranged between the first vertical formwork 32 and the second vertical formwork 33. A first horizontal formwork 34 is arranged at the top of the second vertical formwork 33. The first horizontal formwork 34 is horizontally arranged, and the first horizontal formwork 34 is arranged on the side of the second vertical formwork 33 away from the first vertical formwork 32. A third vertical formwork 35 is arranged at one end of the first horizontal formwork 34 away from the first vertical formwork 32. The third vertical formwork 35 is vertically arranged, and a second water-stop tie rod 42 is arranged between the first vertical formwork 32 and the third vertical formwork 35. A second horizontal formwork 36 is arranged at the top of the third vertical formwork 35. The second horizontal formwork 36 is horizontally arranged, and the second horizontal formwork 36 is arranged on the side of the third vertical formwork 35 close to the first vertical formwork 32. A fourth vertical formwork 37 is arranged on the side of the second horizontal formwork 36 close to the first vertical formwork 32. The fourth vertical formwork 37 is vertically arranged and extends upward. An inclined support plate 38 is also arranged between the second horizontal formwork and the fourth vertical formwork 37. The fourth vertical formwork 37 is attached to the side of the protruding part 12. The width of the bottom formwork 31 is the same as the width of the longitudinal beam. The height of the first vertical formwork 32 is the sum of the heights of the second vertical formwork 33 and the third vertical formwork 35. The width of the first horizontal formwork 34 is the same as the width of the second horizontal formwork 36.

[0019] A dustpan opening is arranged at the top of the first vertical formwork 32. The dustpan opening includes an inclined guide plate 51, the inclined guide plate 51 extends obliquely upward in a direction away from the fourth vertical formwork 37, and a vertical guide plate 52 is arranged at the top of the inclined guide plate 51. The vertical guide plate 52 is vertically arranged, and a gap is left between the top of the vertical guide plate 52 and the bottom of the primary beam 1.

[0020] The air defense door 2 is provided with a formwork support assembly for supporting the secondary casting formwork assembly. The bottom of the first horizontal formwork 34 is provided with a first double-steel pipe keel 61, and the bottom of the second horizontal formwork 36 is provided with a second double-steel pipe keel 62. The formwork support assembly includes a horizontal formwork support 63 arranged on the air defense door 2. The horizontal formwork support 63 is provided with a first vertical formwork support 64 and a second vertical formwork support 65. The first vertical formwork support 64 supports the bottom of the first double-steel pipe keel 61, and the second vertical formwork support 65 supports the bottom of the second double-steel pipe keel 62.

[0021] Specific implementation process:

[0022] Structures such as air defense wall columns and beams need to be cast in two times. Taking the relatively complex beam structure of formwork support as an example, during the reverse construction, the air defense beam is first cast with a primary beam 1 of 350 mm, and vertical casting holes 11 are reserved in the primary beam 1 at an interval of 1.5 m. During the secondary casting, first set up the formwork support assembly, lay the bottom formwork 31, then lay each vertical formwork and horizontal formwork, pass the water-stop tie rods, and fix the inclined support plates 38 at the parts that cannot be reinforced. Since there may be non-compact situations during casting, a hopper mouth is supported on the side of the formwork, arranged at intervals longitudinally, and at the same time as the concrete casting observation port.

[0023] The utility model solves the problem of the formwork support and reinforcement structure for the secondary casting of the concrete of the air defense structure during the reverse construction method, can play an effective supporting role, ensure the safety of the formwork system, reduce the construction difficulty, and is beneficial to improving the construction quality of the structure.

[0024] The above specific implementation manners only describe the preferred implementation manners of the utility model, rather than limiting the protection scope of the utility model. Without departing from the design concept and spirit scope of the utility model, various deformations, substitutions and improvements made by those of ordinary skill in the art to the technical solutions of the utility model according to the text description and drawings provided by the utility model shall all fall within the protection scope of the utility model. The protection scope of the utility model is determined by the claims.

Claims

1. A secondary pouring formwork reinforcement structure for a civil air defense wall in a full reverse construction method, characterized in that: It comprises a primary beam (1), a civil air defense door (2) is arranged below the primary beam (1), a secondary casting formwork assembly is arranged between the primary beam (1) and the civil air defense door (2), a vertical casting hole (11) is reserved in the primary beam (1), the vertical casting hole (11) is located above the secondary casting formwork assembly, and a formwork assembly for supporting the secondary casting formwork assembly is arranged on the civil air defense door (2).

2. The secondary pouring formwork reinforcement structure for civil air defense walls in the full reverse construction method according to claim 1 is characterized in that: The secondary casting formwork assembly comprises a bottom formwork (31), the bottom formwork (31) is arranged in parallel, and a first vertical formwork (32) and a second vertical formwork (33) are respectively arranged at two ends of the bottom formwork (31), the first vertical formwork (32) and the second vertical formwork (33) are arranged vertically, and a first water-stop tension screw (41) is arranged between the first vertical formwork (32) and the second vertical formwork (33).

3. The secondary pouring formwork reinforcement structure for civil air defense walls in the full reverse construction method according to claim 2 is characterized in that: A first horizontal formwork (34) is provided on the top of the second vertical formwork (33), the first horizontal formwork (34) is horizontally arranged, the first horizontal formwork (34) is arranged on a side of the second vertical formwork (33) away from the first vertical formwork (32), a third vertical formwork (35) is provided on an end of the first horizontal formwork (34) away from the first vertical formwork (32), the third vertical formwork (35) is vertically arranged, and a second water-stop tension screw (42) is provided between the first vertical formwork (32) and the third vertical formwork (35).

4. The secondary pouring formwork reinforcement structure for civil air defense walls in the full reverse construction method according to claim 3 is characterized in that: A second horizontal template (36) is provided on the top of the third vertical template (35), the second horizontal template (36) is arranged horizontally, and the second horizontal template (36) is arranged on a side of the third vertical template (35) close to the first vertical template (32). A fourth vertical template (37) is provided on a side of the second horizontal template (36) close to the first vertical template (32), and the fourth vertical template (37) is arranged vertically and extends upwards. A diagonal support plate (38) is also provided between the second horizontal template (36) and the fourth vertical template (37).

5. The secondary pouring formwork reinforcement structure for civil air defense walls in the full reverse construction method according to claim 4 is characterized in that: A protrusion (12) is provided at the bottom of the primary beam (1), the vertical casting hole (11) passes through the protrusion (12), the fourth vertical template (37) is attached to the side of the protrusion (12), the width of the bottom template (31) is the same as the width of the longitudinal beam, the height of the first vertical template (32) is the sum of the height of the second vertical template (33) and the height of the third vertical template (35), and the width of the first horizontal template (34) is the same as the width of the second horizontal template (36).

6. The secondary pouring formwork reinforcement structure for civil air defense walls in the full reverse construction method according to claim 5 is characterized in that: A dustpan opening is provided at the top of the first vertical template (32), and the dustpan opening comprises an inclined guide plate (51), and the inclined guide plate (51) extends upwardly and obliquely away from the fourth vertical template (37), and a vertical guide plate (52) is provided at the top of the inclined guide plate (51), and the vertical guide plate (52) is vertically arranged, and a gap is left between the top of the vertical guide plate (52) and the bottom of the primary beam (1).

7. The secondary pouring formwork reinforcement structure for civil air defense walls in the full reverse construction method according to claim 6 is characterized in that: A first double steel tube keel (61) is provided at the bottom of the first transverse formwork (34), and a second double steel tube keel (62) is provided at the bottom of the second transverse formwork (36). The formwork assembly comprises a transverse formwork frame (63) arranged on the civil air defense door (2), and a first vertical formwork frame (64) and a second vertical formwork frame (65) are provided on the transverse formwork frame (63). The first vertical formwork frame (64) is supported at the bottom of the first double steel tube keel (61), and the second vertical formwork frame (65) is supported at the bottom of the second double steel tube keel (62).

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