Closed supporting system and method for synchronous installation of electromechanical pipelines above post-cast strip

Abstract

The invention relates to the technical field of building construction, and provides a closed supporting system and method for synchronous installation of electromechanical pipelines above a post-cast strip. The electromechanical pipeline construction cavity is defined by a concrete retaining wall and a closed steel plate covering the post-cast strip and located over the post-cast strip. A municipal electromechanical pipe network comprehensive support installed on the closed steel plate through a base is arranged in the cavity and used for supporting pipelines. And a pouring reserved pipeline is arranged on the closed steel plate. The safe closed operation cavity is constructed above the suspended post-cast strip, so that municipal electromechanical pipe network installation and post-cast strip structure construction can be carried out synchronously, the construction period bottleneck and the safety risk when a pipeline passes through a post-cast strip area are solved, and the construction method is suitable for projects such as a large complex and a junction station yard.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, specifically relating to a closed support system and method for the synchronous installation of electromechanical pipelines above the post-pouring strip. Background Technology

[0002] In large-scale municipal complexes, transportation hubs, and above-ground parks with large underground spaces, a soil cover layer is typically designed above the basement roof slab for landscaping purposes. This layer also requires the laying of numerous municipal electromechanical pipelines, such as water supply, drainage, electricity, and communication lines. These pipelines usually need to crisscross and cover the entire site. Post-cast strips are structural joints designed to address issues such as differential settlement and concrete shrinkage. Traditionally, they should only be poured and sealed after the main structure has largely stabilized. During this period, the structural slab in the post-cast strip area is suspended, a support system must be maintained directly beneath it, and no backfilling or other loads may be applied directly above it.

[0003] Existing technologies (such as patent documents with publication numbers CN115787738A and CN216615983U) primarily focus on solving the problems of pre-filling and early waterproofing of post-cast strips. By setting precast cover plates and reserving pouring holes above the post-cast strip, backfilling and waterproofing can be carried out before pouring. However, these solutions share a common limitation: they only address backfilling and foundation waterproofing, but do not consider the complex situation where planned municipal electromechanical pipelines or main roads must pass directly above the post-cast strip. For example, in large-scale station projects, the paths of ring-shaped fire protection pipe networks and main cable trays connecting different functional areas may not be able to avoid the post-cast strip.

[0004] Traditionally, pipelines can only be laid in the area above the post-cast strip after it has been poured and reached sufficient strength. This would severely delay critical pipeline work, impacting overall commissioning and operation. Conversely, directly excavating trenches and installing pipelines above untreated, suspended post-cast strips poses a serious risk of structural collapse. Existing simple covering plates cannot provide a safe and stable working surface and supporting foundation for pipeline installation.

[0005] Therefore, there is an urgent need for a construction scheme that can safely and efficiently complete the laying of permanent municipal electromechanical pipelines directly above the post-cast strip concrete before the post-cast strip concrete is poured, while ensuring the absolute safety of the structure, thereby shortening the overall construction period. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of existing technologies and provide an integrated system and method for pre-sealing and supporting post-cast strips suitable for municipal electromechanical pipeline laying. This system not only achieves pre-sealing and backfilling of the post-cast strip, but more importantly, it constructs a robust and enclosed construction cavity for electromechanical pipelines directly above the post-cast strip, allowing the installation of municipal pipelines to be carried out simultaneously without relying on the sealed state of the post-cast strip.

[0007] To achieve the above objectives, the present invention provides the following technical solution: In a first aspect, the present invention proposes a closed support system for the synchronous installation of electromechanical pipelines above the post-pouring strip, including a support system and a device for pre-sealing the post-pouring strip; The support system is located below the basement roof slab and is distributed on both sides of the post-cast strip; The pre-sealing device for the post-cast strip includes a concrete retaining wall, a sealing steel plate, a pre-reserved concrete pouring pipe, and a comprehensive support for municipal electromechanical pipelines. The concrete retaining wall is located above the basement roof slab on both sides of the post-cast strip. The sealing steel plate covers the top of the post-cast strip, and the two side edges of the sealing steel plate are connected to the inner side of the concrete retaining wall, so that the sealing steel plate and the concrete retaining walls on both sides together enclose an electromechanical pipeline construction cavity located directly above the post-cast strip. At least one pre-reserved concrete pouring pipe is provided on the sealing steel plate, which penetrates the sealing steel plate and extends downward into the post-cast strip. The comprehensive support for municipal electromechanical pipelines is located inside the electromechanical pipeline construction cavity and is used to support the municipal electromechanical pipelines inside the electromechanical pipeline construction cavity.

[0008] Furthermore, the post-cast strip pre-sealing device also includes a concrete cover plate, which covers the concrete retaining walls on both sides to seal the electromechanical pipeline construction cavity; the upper end of the pre-reserved pipe for concrete pouring passes through the concrete cover plate.

[0009] Furthermore, the upper end of the pre-reserved pipe for concrete pouring is provided with a removable pipe cover.

[0010] Furthermore, the system also includes a first backfill layer and a second backfill layer. The first backfill layer is backfilled above the basement roof slab and wraps around the perimeter of the pre-sealing device for the post-cast strip. The second backfill layer covers the first backfill layer and the pre-sealing device for the post-cast strip.

[0011] Furthermore, the upper surface of the first backfill layer is lower than the upper surface of the reserved pipe for concrete pouring.

[0012] Furthermore, the post-pouring strip pre-sealing device also includes an electromechanical support frame base pre-embedded and fixed on the sealing steel plate. The electromechanical support frame base is equipped with a height adjustment component and is connected to the municipal electromechanical pipeline integrated support through the height adjustment component to adjust the height of the municipal electromechanical pipeline integrated support.

[0013] Furthermore, the municipal electromechanical pipeline integrated support includes a portal frame and a pipeline installation channel set on the portal frame; the lower end of the portal frame is connected to the electromechanical support frame base, and the pipeline installation channel is used to support the municipal electromechanical pipelines passing through it.

[0014] Furthermore, the support system is a disc-lock scaffolding support system, comprising multiple support units. Each support unit includes multiple disc-lock uprights arranged in a rectangular array. The bottom of the disc-lock uprights is supported on the ground or the lower structure, and the top is supported below the basement roof slab by a top support.

[0015] Furthermore, the multiple uprights of each support unit are connected by crossbars; each support unit also includes a template beam assembly disposed at the upper end of the multiple uprights, the template beam assembly including a main support beam disposed at the upper end of the top support, a secondary support beam disposed at the upper end of the main support beam, and a support template laid at the upper end of the secondary support beam; a pad is disposed at the lower end of each upright.

[0016] Secondly, the present invention also proposes a construction method, implemented using the aforementioned system, the method comprising the following steps: The support system is constructed under the basement roof slab on both sides of the post-pouring strip; Concrete retaining walls for the pre-sealing device of the post-cast strip are built above the basement roof slab on both sides of the post-cast strip. The sealing steel plate is covered on the top of the post-cast strip and connected to the concrete retaining walls on both sides to form the electromechanical pipeline construction cavity. Inside the electromechanical pipeline construction cavity, the municipal electromechanical pipeline integrated support is installed on the closed steel plate, and the municipal electromechanical pipeline is laid. A first-stage backfill is performed above the basement roof slab to wrap around the perimeter of the pre-sealing device for the post-pouring strip, forming the first backfill layer. After the basement structure has settled and stabilized, concrete is poured into the post-cast strip through the concrete pouring pre-reserved pipe on the closed steel plate. After the concrete in the post-cast strip has set, the construction cavity for the electromechanical pipeline is sealed with a concrete cover plate, and the upper end of the reserved pipeline for concrete pouring is sealed with a pipe cover. The second stage of backfilling is then carried out to cover the first backfill layer and the pre-sealing device for the post-cast strip, forming the second backfill layer.

[0017] The beneficial effects of this invention are as follows: A closed-bottom construction cavity for electromechanical pipelines is formed by enclosing a steel plate and two concrete retaining walls on either side, located directly above the post-cast strip. This cavity completely physically isolates the suspended and vulnerable post-cast strip area from the upper working space. This ensures that the forces exerted by construction personnel, installation equipment, and pipeline loads are all transferred through the rigid closed steel plate to the solid concrete retaining walls on both sides and the completed roof structure below, completely avoiding the suspended post-cast strip below. Before the concrete pouring of the post-cast strip, an absolutely safe and permanent pipeline installation working surface is created directly above it, achieving simultaneous municipal pipeline construction and structural post-cast strip construction. The support system distributed on both sides of the post-cast strip reliably supports the main structure of the basement roof slab. The electromechanical pipeline construction cavity, as a rigid whole, transfers the pipelines, construction live loads, and part of the overburden load within the cavity to the supported roof slabs on both sides through the closed steel plate and retaining walls. The suspended area of ​​the post-cast strip does not bear any construction loads, ensuring the structural safety of the post-cast strip area during construction and completely eliminating the structural risks that may exist in traditional methods. Meanwhile, phased backfilling (the first backfill layer only wraps the outer perimeter, and the second backfill layer is carried out after the structure is closed) further controls the lateral pressure of the backfill soil on the suspended area and the risk of accidental overload. The sealing steel plate integrates pre-reserved pipes for concrete pouring while providing pre-sealing. The post-pouring strip area is pre-installed with standard structures such as vertical and horizontal waterstop steel plates, wire mesh, and bidirectional double-layer reinforcement. The pre-reserved pipes ensure that self-compacting concrete can be poured directly without damaging the completed upper backfill layer and pipelines. This satisfies the fundamental requirement of delayed closure of the post-pouring strip to release settlement stress, while the pre-reserved channels ensure the convenience and compactness of subsequent concrete pouring, which is beneficial to the construction quality of the post-pouring strip itself. The presence of the sealing steel plate also provides a continuous waterproof base layer for the top of the post-pouring strip, facilitating connection with the overall waterproof layer and improving the long-term waterproof reliability of this weak point. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the system of the present invention.

[0019] Figure 2 This is a structural diagram of a support unit of the support system under one side of the post-cast strip.

[0020] Figure 3 for Figure 1 An enlarged structural diagram of the concrete cover plate after it has been concealed.

[0021] Figure 4 This is a schematic diagram of the structure of the integrated support for municipal electromechanical pipelines of the present invention.

[0022] Figure 5 A schematic diagram of a structure in which a closed steel plate is laid on top of the post-cast strip.

[0023] Figure 6 This is a schematic diagram showing the backfill height of the first and second backfill layers of the present invention.

[0024] In the picture: 1-Support system, 11-Support template, 12-Support secondary beam, 13-Support main beam, 14-Top support, 15-Disc buckle upright, 16-Disc buckle horizontal bar, 17-Disc buckle pin, 18-Plate; 2-Post-cast strip structure, 21-Vertical waterstop steel plate, 22-Horizontal waterstop steel plate, 23-Basement roof slab, 24-Wire mesh, 25-Double-layer steel reinforcement; 3-Post-pouring strip pre-sealing device, 31-Sealing steel plate, 32-Mechanical and electrical support frame base, 33-Concrete pouring reserved pipe, 34-Water pipe, 35-Municipal mechanical and electrical pipeline integrated support, 36-Municipal mechanical and electrical pipeline, 37-Concrete retaining wall, 38-Concrete cover plate, 39-Pipe cover; 4-First backfill layer; 5-Second backfill layer. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figures 1 to 6 As shown, the closed support system for synchronous installation of electromechanical pipelines above the post-pouring strip provided by the present invention mainly includes a support system 1 and a post-pouring strip pre-sealing device 3.

[0027] Support system 1 is a disc-lock scaffolding support system, supporting the basement roof slab 23 that has been poured on both sides of the post-pouring strip. In this embodiment, multiple independent support units are set below each side of the post-pouring strip. Each support unit includes nine disc-lock uprights 15, arranged in a 3×3 rectangular array at 1.2m intervals. The bottom of the disc-lock uprights 15 is provided with a pad 18, and the top is equipped with an adjustable top support 14. The uprights are connected to each other to form a stable frame through disc-lock crossbars 16 and pins 17. The main support beam 13 (made of 100mm×100mm square steel pipe) is erected on the top support 14, and the secondary support beams 12 (made of 50mm×100mm timber) are laid horizontally on the main beam 13. The top layer is covered with wooden or steel support formwork 11, which together form a stable roof support platform.

[0028] The post-cast strip structure 2 serves as the object and environment for the system's operation. It includes conventional design features: between the two sides of already poured concrete (in this embodiment, the poured concrete is the basement roof slab 23), vertical and horizontal water-stop steel plates 21 and 22 are installed to enhance joint waterproofing. The post-cast strip is reinforced with bidirectional, double-layered steel bars 25. Wire mesh 24 is typically installed at both ends of the post-cast strip to intercept concrete during pouring. These are standard structural features that ensure the function and quality of the post-cast strip itself.

[0029] The post-cast strip pre-sealing device 3 includes the following parts: The concrete retaining wall 37, constructed of brick or cast concrete, is formed above the basement roof slab 23 on both sides of the post-cast strip structure 2, serving as the sidewall and retaining structure of the construction cavity. A water pipe 34 can be pre-embedded at the bottom of the concrete retaining wall 37 to connect the inside and outside of the cavity and drain any accidental water accumulation.

[0030] The enclosing steel plate 31 is made of Q355B steel, 10mm thick, and has an anti-corrosion treatment. This enclosing steel plate 31 precisely covers the top of the post-cast strip, and its left and right edges are firmly connected to the inner surfaces of the two concrete retaining walls 37 by welding or high-strength bolts. Thus, the enclosing steel plate 31 serves as the bottom plate of the construction chamber, together with the two concrete retaining walls 37, forming an open-topped electromechanical pipeline construction chamber. This chamber completely conceals the suspended post-cast strip below, providing a safe and dry space for pipeline installation.

[0031] The pre-reserved pipe 33 for concrete pouring is a steel pipe with a diameter of 250mm, which is vertically welded to the closed steel plate 31, passes through the closed steel plate 31 and extends downward into the post-pouring strip, with the upper end protruding above the concrete retaining wall 37.

[0032] The electromechanical support frame base 32 is a sleeve with an embedded adjusting nut, vertically pre-embedded and fixed on the enclosed steel plate 31, located within the construction cavity. The electromechanical support frame base 32 also includes a vertically arranged adjusting screw, which threadedly engages with the adjusting nut inside the sleeve. A bearing seat is provided at the upper end of the adjusting screw, supporting the municipal electromechanical pipeline integrated support 35. A radially arranged handle is also fixed on the adjusting screw. By rotating the handle, the depth of the adjusting screw's insertion into the sleeve is adjusted, thereby adjusting the height of the municipal electromechanical pipeline integrated support 35. The electromechanical support frame base 32 can utilize existing technology.

[0033] The municipal electromechanical pipeline integrated support system 35 is a combined hot-dip galvanized steel support. For example... Figure 4 As shown, it includes a portal frame and a pipe network installation channel (rectangular channel) set on the crossbeam of the portal frame. This municipal electromechanical pipe network integrated support 35 is used to support and fix municipal electromechanical pipes 36 such as ring fire-fighting steel pipes and cable trays.

[0034] The pipe cap 39 is a threaded, removable cap that is installed on top of the pre-reserved pipe 33 in the concrete pouring process to prevent debris from falling in during construction.

[0035] The concrete cover 38 is a precast reinforced concrete slab. After the pipeline installation and post-pouring strip are completed, it covers the top of the concrete retaining walls 37 on both sides to permanently seal the upper opening of the electromechanical pipeline construction cavity and is flush with the surrounding finished surface.

[0036] The first backfill layer 4 is graded sand and gravel or plain soil, backfilled above the basement roof slab 23, wrapping around the perimeter of the pre-sealing device 3 for the post-pouring strip, with its upper surface lower than the upper opening of the reserved pipe 33 for concrete pouring. The second backfill layer 5 is planting soil or subgrade material, covering the first backfill layer 4 and the concrete cover slab 38, up to the landscaping or road design elevation.

[0037] The construction method implementation steps of the system of this invention are as follows: Erecting supports and forming the construction cavity: Erect the support system 1 below the basement roof slab 23 on both sides of the post-cast strip. Concrete retaining walls 37 are built on the basement roof slab 23. The closed steel plate 31 is hoisted and positioned, and reliably connected to the concrete retaining wall 37 to form the construction cavity for electromechanical pipelines.

[0038] Pipeline installation: Construction workers work inside the formed construction cavity, install and level the municipal electromechanical pipeline integrated support 35 through the electromechanical support frame base 32, and then lay and fix various municipal electromechanical pipelines 36.

[0039] First stage backfilling: Earthwork is backfilled on the outside of the concrete retaining wall 37 to form the first backfill layer 4, which is then compacted. At this point, the main pipelines have been installed, and the pressure of the backfill soil acts on the concrete retaining wall 37, not directly on the suspended post-cast strip area.

[0040] Pouring the post-pouring strip: After the main structure has settled and stabilized, open the pipe cover 39 and pump self-compacting concrete into the post-pouring strip through the reserved pipe 33 to complete the structural closure.

[0041] Final sealing and backfilling: After the concrete in the post-cast strip has set, install a concrete cover plate 38 to seal the top of the construction cavity and cover it with a pipe cover 39. Finally, carry out the second stage of backfilling to form the second backfill layer 5 to the design elevation.

[0042] This system and method successfully shortened the laying time of critical municipal pipelines by several months, and the entire operation was carried out in a safe, enclosed space without the need for secondary excavation in sensitive areas, achieving a balance between safety, quality, and schedule.

[0043] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A closed support system for the synchronous installation of electromechanical pipelines above a post-cast strip, characterized in that, This includes the support system and the device for pre-sealing the post-pouring strip; The support system is located below the basement roof slab and is distributed on both sides of the post-cast strip; The pre-sealing device for the post-cast strip includes a concrete retaining wall, a sealing steel plate, a pre-reserved concrete pouring pipe, and a comprehensive support for municipal electromechanical pipelines. The concrete retaining wall is located above the basement roof slab on both sides of the post-cast strip. The sealing steel plate covers the top of the post-cast strip, and the two side edges of the sealing steel plate are connected to the inner side of the concrete retaining wall, so that the sealing steel plate and the concrete retaining walls on both sides together enclose an electromechanical pipeline construction cavity located directly above the post-cast strip. At least one pre-reserved concrete pouring pipe is provided on the sealing steel plate, which penetrates the sealing steel plate and extends downward into the post-cast strip. The comprehensive support for municipal electromechanical pipelines is located inside the electromechanical pipeline construction cavity and is used to support the municipal electromechanical pipelines inside the electromechanical pipeline construction cavity.

2. The enclosed support system for synchronous installation of electromechanical pipelines above the post-cast strip according to claim 1, characterized in that, The post-cast strip pre-sealing device also includes a concrete cover plate, which covers the concrete retaining walls on both sides to seal the electromechanical pipeline construction cavity; the upper end of the pre-reserved pipe for concrete pouring passes through the concrete cover plate.

3. The enclosed support system for synchronous installation of electromechanical pipelines above the post-cast strip according to claim 2, characterized in that, The upper end of the pre-reserved pipe for concrete pouring is equipped with a removable pipe cover.

4. The enclosed support system for synchronous installation of electromechanical pipelines above the post-cast strip according to claim 2, characterized in that, The system also includes a first backfill layer and a second backfill layer. The first backfill layer is backfilled above the basement roof slab and wraps around the perimeter of the pre-sealing device for the post-cast strip. The second backfill layer covers the first backfill layer and the pre-sealing device for the post-cast strip.

5. The enclosed support system for synchronous installation of electromechanical pipelines above the post-cast strip according to claim 4, characterized in that, The upper surface of the first backfill layer is lower than the upper surface of the reserved pipe in the concrete pouring.

6. The enclosed support system for synchronous installation of electromechanical pipelines above the post-cast strip according to claim 1, characterized in that, The post-pouring strip pre-sealing device also includes an electromechanical support frame base pre-embedded and fixed on the sealing steel plate. The electromechanical support frame base is equipped with a height adjustment component and is connected to the municipal electromechanical pipeline integrated support through the height adjustment component to adjust the height of the municipal electromechanical pipeline integrated support.

7. The enclosed support system for synchronous installation of electromechanical pipelines above the post-cast strip according to claim 6, characterized in that, The municipal electromechanical pipeline integrated support includes a portal frame and a pipeline installation channel set on the portal frame; the lower end of the portal frame is connected to the electromechanical support frame base, and the pipeline installation channel is used to support the municipal electromechanical pipelines passing through it.

8. The enclosed support system for synchronous installation of electromechanical pipelines above the post-cast strip according to claim 1, characterized in that, The support system is a disc-lock scaffolding support system, which includes multiple support units. Each support unit includes multiple disc-lock uprights arranged in a rectangular array. The bottom of the disc-lock uprights is supported on the ground or the lower structure, and the top is supported under the basement roof slab by a top support.

9. The enclosed support system for synchronous installation of electromechanical pipelines above the post-cast strip according to claim 8, characterized in that, The multiple uprights of each support unit are connected by crossbars; each support unit also includes a template beam assembly disposed at the upper end of the multiple uprights, the template beam assembly including a main support beam disposed at the upper end of the top support, a secondary support beam disposed at the upper end of the main support beam, and a support template laid at the upper end of the secondary support beam; a pad is disposed at the lower end of each upright.

10. A construction method, implemented using the system described in any one of claims 1-9, characterized in that, The method includes the following steps: The support system is constructed under the basement roof slab on both sides of the post-pouring strip; Concrete retaining walls for the pre-sealing device of the post-cast strip are built above the basement roof slab on both sides of the post-cast strip. The sealing steel plate is covered on the top of the post-cast strip and connected to the concrete retaining walls on both sides to form the electromechanical pipeline construction cavity. Inside the electromechanical pipeline construction cavity, the municipal electromechanical pipeline integrated support is installed on the closed steel plate, and municipal electromechanical pipelines are laid. A first-stage backfill is performed above the basement roof slab to wrap around the perimeter of the pre-sealing device for the post-pouring strip, forming the first backfill layer. After the basement structure has settled and stabilized, concrete is poured into the post-cast strip through the concrete pouring pre-reserved pipe on the closed steel plate. After the concrete in the post-cast strip has set, the construction cavity for the electromechanical pipeline is sealed with a concrete cover plate, and the upper end of the reserved pipeline for concrete pouring is sealed with a pipe cover. The second stage of backfilling is then carried out to cover the first backfill layer and the pre-sealing device for the post-cast strip, forming the second backfill layer.

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