Support changing structure and support changing method of prefabricated support changing plate

Abstract

The invention relates to the technical field of building construction, in particular to a support changing structure and method of a prefabricated support changing plate. The support changing structure comprises a basement building body, a supporting wall and an inner supporting beam, a cast-in-place continuous support changing plate strip is arranged between a basement bottom plate and the supporting wall, the opposite faces of a basement outer wall and the supporting wall are provided with corresponding supports for bearing prefabricated support changing plates, and a top support adjusting part is arranged on a main plate body; the support changing method comprises the steps of pouring the bottom plate, the plate strip, the outer wall and the top plate, installing the prefabricated support changing plate, dismantling the supporting beam, backfilling the fertilizer groove and dismantling the prefabricated support changing plate. The inner supporting beam can be dismantled in advance, the construction period is shortened, the prefabricated supporting plate can be recycled, and the construction economic benefit and the resource utilization efficiency are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and specifically to a replacement bracing structure and method for precast replacement bracing plates. Background Art

[0002] In the field of building construction, especially in deep foundation pit operations, as a commonly used retaining method, the demolition efficiency of the internal support beam and slab structure of the support retaining structure greatly affects the overall progress of basement construction.

[0003] For traditional internal support demolition, it is necessary to wait until the waterproof construction of the basement exterior wall is completed, the backfill of the fat groove reaches the design elevation and is compacted to the standard. This will undoubtedly affect the construction of the superstructure and lengthen the construction period. To solve this problem, a replacement bracing structure and method for precast replacement bracing plates are proposed. Summary of the Invention

[0004] The present invention aims to solve the above problems, and thus provides a replacement bracing structure and method for precast replacement bracing plates.

[0005] To solve the above problems, the present invention adopts the following technical solutions: A replacement bracing structure for precast replacement bracing plates, comprising a basement building main body composed of a basement floor slab, a basement exterior wall, and a basement roof slab, a retaining wall, an internal support beam, and a waist beam arranged outside the basement building main body, a cast-in-place continuous replacement bracing plate belt arranged between the basement floor slab and the retaining wall, a first support integrally formed on the opposite surfaces of the basement exterior wall and the retaining wall, a second support arranged on the opposite surfaces of the retaining wall and the basement exterior wall, the second support being opposite to the first support in position, a same precast replacement bracing plate arranged above the first support and the second support, the precast replacement bracing plate being arranged at the same height as the basement roof slab, and the precast replacement bracing plate comprising a main plate body and a top support adjustment part arranged on one side of the main plate body.

[0006] Further, a raised stepped structure is arranged on one side of the top surface of the second support close to the retaining wall, and the side surface of the stepped structure away from the retaining wall is a surface that abuts against the precast replacement bracing plate; this prevents the stress area of the retaining wall from being too small and causing damage to the wall body. At the same time, a certain distance is left between the installation position of the precast replacement bracing plate and the retaining wall to provide space for installation and disassembly.

[0007] Furthermore, the top support adjusting part includes a first support rod and a second support rod both with an external thread structure at one end, and the external threads of the two support rods have opposite helix directions. A double-threaded internal thread sleeve is arranged between the first support rod and the second support rod. A rotating handwheel is sleeved on the double-threaded internal thread sleeve, and the rotating handwheel is clamped with the double-threaded internal thread sleeve. A top plate is arranged at the far ends of the first support rod and the second support rod. The far ends of the second support rod and the first support rod are buried in the main board body, and a limiting plate is connected to the end; by rotating the handwheel, using the opposite helix directions of the external threads of the first support rod and the second support rod and the cooperation of the double-threaded internal thread sleeve, the extended lengths of the two support rods can be conveniently adjusted, so that the top plate at the end of the support rod is in close contact with the supporting wall or the external wall of the basement, thereby realizing the stable support of the precast replacement support plate and facilitating the installation.

[0008] A replacement support method for a replacement support structure of a precast replacement support plate is carried out according to the following steps: S1. Pour the basement floor and the continuous replacement support plate belt; S2. Pour the external wall and the top plate of the basement: After the basement floor and the continuous replacement support plate belt reach a certain strength, carry out the pouring construction of the external wall and the top plate of the basement; when pouring the external wall of the basement, integrally form a first support on the opposite surface of the external wall of the basement and the supporting wall to ensure the accurate position and firm structure of the first support; at the same time, a second support is arranged on the opposite surface of the supporting wall and the external wall of the basement to ensure that the first support and the second support are opposite in position; S3. Install the precast replacement support plate: After the strength of the external wall and the top plate of the basement reaches the standard, start to install the precast replacement support plate; use a lifting device to hoist the precast replacement support plate above the first support and the second support, and slowly lower it so that the precast replacement support plate is stably placed on the two supports; adjust the top support adjusting part, adjust the first support rod and the second support rod with an external thread structure through the double-threaded internal thread sleeve, rotate the handwheel, and make the top plates of the first support rod and the second support rod in close contact with the supporting wall or the external wall of the basement to realize the stable support of the precast replacement support plate; S4. Demolish the support beam: After the precast replacement support plate is stably installed, carry out the demolition work of the internal support beam; S5. Backfill the fat groove: After the internal support beam is demolished, carry out the backfill of the fat groove; adopt the method of layered backfill and layered compaction to ensure that the backfill soil of the fat groove can effectively transfer the side wall pressure of the foundation pit; S6. Demolish the precast replacement support plate: After the basement construction is completed and the backfill soil of the fat groove reaches the design strength, carry out the demolition work of the precast replacement support plate; by rotating the handwheel, reversely adjust the top support adjusting part to release the support of the precast replacement support plate; then, use a lifting device to slowly lift the precast replacement support plate and stably transport it away from the construction site for turnover use to realize the recycling of resources.

[0009] The present invention adopting the above technical solution, compared with the prior art, its prominent features are: In the present invention, first and second supports are provided at corresponding positions on the opposite faces of the basement exterior wall and the retaining wall, and a precast replacement bracing plate is arranged above the two supports to support the retaining wall, enabling the internal support beam to be removed in advance without waiting for the backfilling of the side trench. This effectively shortens the construction period, speeds up the overall progress of the basement construction, and saves time for the construction of the superstructure. After the precast replacement bracing plate is removed, it can be recycled, which not only ensures the construction progress but also realizes the recycling of resources, improving the economic benefits of construction and the resource utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic diagram of the main structure of an embodiment of the present invention; Figure 2 is a schematic diagram of the pouring structure of the basement floor slab and the continuous replacement bracing plate belt of an embodiment of the present invention; Figure 3 is a schematic diagram of the pouring structure of the basement exterior wall and the roof slab of an embodiment of the present invention; Figure 4 is a schematic diagram of the installation structure of the precast replacement bracing plate of an embodiment of the present invention; Figure 5 is a schematic diagram of the removal structure of the support beam of an embodiment of the present invention; Figure 6 is a schematic diagram of the side trench backfilling structure of an embodiment of the present invention; Figure 7 is a schematic diagram of the removal structure of the fabricated replacement bracing plate of an embodiment of the present invention; Figure 8 is an embodiment of the present invention Figure 1 partial enlarged structure schematic diagram of part A in; In the figure, the markings are: cast-in-place continuous replacement bracing plate belt 1, retaining wall 2, second support 3, precast replacement bracing plate 4, backfill soil 5, waist beam 6, internal support beam 7, basement roof slab 8, first support 9, basement exterior wall 10, basement floor slab 11, first brace 41, second brace 42, bidirectional internal thread sleeve 43, rotary handwheel 44, roof slab 45, limit plate 46. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0011] The present invention will be further described below in conjunction with embodiments, and the purpose is only to better understand the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0012] See Figures 1-8A prefabricated bracing plate replacement structure includes a basement building body consisting of a basement floor 11, a basement outer wall 10 and a basement roof 8, a supporting wall 2 and an inner supporting beam 7 and a waist beam 6 arranged on the periphery of the basement building body, a cast-in-place continuous bracing plate belt 1 is arranged between the basement floor 11 and the supporting wall 2, a first support 9 is integrally formed on the opposite surface of the basement outer wall 10 and the supporting wall 2, a second support 3 is arranged on the opposite surface of the supporting wall 2 and the basement outer wall 10, the second support 3 is opposite to the first support 9, the same prefabricated bracing plate 4 is arranged above the first support 9 and the second support 3, the prefabricated bracing plate 4 is arranged at the same height as the basement roof 8, and the prefabricated bracing plate 4 includes a main body and a top support adjustment part arranged on one side of the main body. A raised step structure is provided on the side of the top surface of the second support 3 close to the supporting wall 2, and the side of the step structure away from the supporting wall 2 is the abutment surface with the prefabricated replacement support plate 4; this prevents the supporting wall 2 from having a force-bearing area that is too small to cause damage to the wall body. At the same time, a certain distance is left between the installation position of the prefabricated replacement support plate 4 and the supporting wall 2 to leave space for installation and disassembly. The top support adjustment part includes a first support rod 41 and a second support rod 42 with an external thread structure at one end, and the external threads of the two support rods are rotated in opposite directions. A two-way internal thread sleeve 43 is arranged between the first support rod 41 and the second support rod 42, and a rotating hand wheel 44 is mounted on the two-way internal thread sleeve 43. The rotating hand wheel 44 is clamped with the two-way internal thread sleeve 43. A top plate 45 is arranged at the distal ends of the first support rod 41 and the second support rod 42. The distal ends of the second support rod 42 and the first support rod 41 are buried in the main body, and the ends are connected to the limit plate 46. By rotating the hand wheel 44, using the opposite rotation directions of the external threads of the first support rod 41 and the second support rod 42 and the cooperation of the two-way internal thread sleeve 43, the extension length of the two support rods can be conveniently adjusted, so that the top plate 45 at the end of the support rod is in close contact with the supporting wall 2 or the basement outer wall 10, thereby realizing stable support for the prefabricated replacement support plate 4, which is convenient for installation. A method for replacing a support structure of a prefabricated support plate replacement structure is performed according to the following steps: S1, basement floor 11 and continuous support strip 1 casting; S2. Pouring of the basement exterior wall 10 and the roof slab 8: After the basement floor slab 11 and the continuous replacement support slab band 1 reach a certain strength, the pouring construction of the basement exterior wall 10 and the roof slab 8 is carried out; when pouring the basement exterior wall 10, the first support 9 is integrally formed on the opposite surface of the basement exterior wall 10 and the retaining wall 2 to ensure the accurate position and firm structure of the first support 9; at the same time, the second support 3 is set on the opposite surface of the retaining wall 2 and the basement exterior wall 10 to ensure that the positions of the first support 9 and the second support 3 are opposite to each other. S3. Installation of the precast replacement support slab 4: After the basement exterior wall 10 and the roof slab 8 reach the qualified strength, the installation of the precast replacement support slab 4 is started; the precast replacement support slab 4 is hoisted by a lifting device to above the first support 9 and the second support 3 and slowly lowered to place the precast replacement support slab 4 stably on the two supports; the top support adjusting part is adjusted, and the two first struts 41 and the second strut 42 with external thread structures are adjusted through the bidirectional internal thread sleeve 43, and the handwheel 44 is rotated to make the roof slabs 45 of the first strut 41 and the second strut 42 in close contact with the retaining wall 2 or the basement exterior wall 10 to realize the stable support of the precast replacement support slab 4. S4. Demolition of the support beam 7: After the precast replacement support slab 4 is installed stably, the demolition work of the internal support beam 7 is carried out. S5. Backfilling of the side trench: After the demolition of the internal support beam 7 is completed, the side trench is backfilled; the method of layered backfilling and layered compaction is adopted to ensure that the backfill soil 5 of the side trench can effectively transfer the side wall pressure of the foundation pit. S6. Demolition of the precast replacement support slab 4: After the basement construction is completed and the backfill soil 5 of the side trench reaches the design strength, the demolition work of the precast replacement support slab 4 is carried out; by rotating the handwheel 44, the top support adjusting part is adjusted in the reverse direction to release the support of the precast replacement support slab 4; then, the precast replacement support slab 4 is slowly hoisted by a lifting device and smoothly transported away from the construction site for turnover use to realize the recycling of resources.

[0013] In the present invention, the first and second supports with corresponding positions are set on the opposite surfaces of the basement exterior wall and the retaining wall, and the precast replacement support slab is arranged above the two supports to support the retaining wall, so that the internal support beam can be demolished in advance without waiting for the backfilling of the side trench, effectively shortening the construction period, accelerating the overall progress of the basement construction, and saving time for the construction of the superstructure. After the precast replacement support slab is demolished, it can be used for turnover, which not only ensures the construction progress but also realizes the recycling of resources, improving the economic benefits of construction and the resource utilization efficiency. The above are only the preferred and feasible embodiments of the present invention, and thus do not limit the scope of the rights of the present invention. Any equivalent changes made by using the content of the specification and drawings of the present invention are included within the scope of the rights of the present invention.

Claims

1. A replacement bracing structure for prefabricated replacement bracing plates, comprising a basement building main body composed of a basement floor slab, an exterior basement wall, and a basement roof slab, a retaining wall, an internal bracing beam, and a waist beam arranged on the periphery of the basement building main body, characterized in that: A cast-in-place continuous replacement support slab belt is arranged between the basement floor slab and the retaining wall. A first support is integrally formed on the opposite surfaces of the basement exterior wall and the retaining wall. A second support is arranged on the opposite surfaces of the retaining wall and the basement exterior wall. The second support is opposite to the first support in position. The same precast replacement support slab is arranged above the first support and the second support. The precast replacement support slab is arranged at the same height as the basement top slab. The precast replacement support slab includes a main board body and a top support adjusting part arranged on one side of the main board body.

2. The replacement bracing structure of a prefabricated replacement bracing plate according to claim 1, characterized in that: On one side of the top surface of the second support close to the retaining wall, a protruding stepped structure is arranged. The side surface of the stepped structure away from the retaining wall is the abutting surface against the precast replacement support slab.

3. The replacement bracing structure of a precast replacement bracing plate according to claim 1, wherein: The top support adjusting part includes two first support rods and second support rods with external thread structures at one end. The external threads of the two support rods have opposite helix directions. A double-threaded internal thread sleeve is arranged between the first support rod and the second support rod. A rotating handwheel is sleeved on the double-threaded internal thread sleeve. The rotating handwheel is clamped with the double-threaded internal thread sleeve. A top plate is arranged at the far ends of the first support rod and the second support rod. The far ends of the second support rod and the first support rod are buried in the main board body, and a limiting plate is connected to the end.

4. A method for replacing struts of a strut replacement structure of a precast strut replacement plate as described in any one of claims 1-3, characterized in that, Proceed according to the following steps: S1. Pour the basement floor slab and the continuous replacement support slab belt; S2. Pour the basement exterior wall and the top slab: After the basement floor slab and the continuous replacement support slab belt reach a certain strength, carry out the pouring construction of the basement exterior wall and the top slab; when pouring the basement exterior wall, integrally form a first support on the opposite surfaces of the basement exterior wall and the retaining wall to ensure the accurate position and firm structure of the first support; at the same time, arrange a second support on the opposite surfaces of the retaining wall and the basement exterior wall to ensure that the first support and the second support are opposite to each other in position; S3. Install the precast replacement support slab: After the strength of the basement exterior wall and the top slab meets the standard, start to install the precast replacement support slab; use a lifting device to hoist the precast replacement support slab above the first support and the second support, and slowly lower it to make the precast replacement support slab stably placed on the two supports; adjust the top support adjusting part, adjust the two first support rods and second support rods with external thread structures through the double-threaded internal thread sleeve, rotate the rotating handwheel to make the top plates of the first support rod and the second support rod closely contact the retaining wall or the basement exterior wall, and realize the stable support of the precast replacement support slab; S4. Demolish the support beam: After the precast replacement support slab is stably installed, carry out the demolition work of the internal support beam; S5. Backfill the fat groove: After the demolition of the internal support beam is completed, backfill the fat groove; adopt the method of layered backfilling and layered compaction to ensure that the backfill soil in the fat groove can effectively transfer the side wall pressure of the foundation pit; S6. Demolish the precast replacement support slab: After the basement construction is completed and the backfill soil in the fat groove reaches the design strength, carry out the demolition work of the precast replacement support slab; reverse-adjust the top support adjusting part by rotating the rotating handwheel to release the support of the precast replacement support slab; then, use a lifting device to slowly lift the precast replacement support slab and stably transport it away from the construction site for turnover use to realize the recycling of resources.

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