Prefabricated valve well structure and construction method thereof

Abstract

The invention provides a prefabricated valve well structure and a construction method thereof, and relates to the field of municipal engineering. The prefabricated well chamber comprises a first prefabricated well chamber body and a second prefabricated well chamber body which are symmetrically arranged. A first mounting channel is formed between the side walls of the first prefabricated well chamber and the second prefabricated well chamber; a socket steel plate is inserted into the first mounting channel, and a plurality of first connecting steel bars are arranged in the first mounting channel; mounting ports are formed in the socket steel plate, and pipelines are connected into the two mounting ports. According to the device and method, through the structural form that the first prefabricated well chamber and the second prefabricated well chamber are prefabricated and assembled, the weight of the assembly well is reduced, transportation and installation are convenient, and efficient construction and installation of the large assembly type valve well can be achieved.

Description

Technical Field

[0001] This application relates to the field of municipal engineering, and in particular to a prefabricated assembled valve well structure and its construction method. Background Technology

[0002] Valve wells are key structures in underground pipeline systems. Their main function is to provide space for the operation, maintenance, and repair of valves, instruments, flow meters, and other equipment installed on the pipelines, while protecting these devices from external soil pressure, water pressure, and environmental erosion, thus ensuring the safe and stable operation of the pipeline system.

[0003] However, existing prefabricated manholes are very heavy, take up a lot of space, and are very inconvenient to transport and hoist. The sealing of pipe penetration holes often relies on manual operation on site, resulting in poor sealing reliability and making them a high-risk area for leakage. Summary of the Invention

[0004] One of the purposes of this application is to provide a prefabricated assembly valve well structure and its construction method, which aims to solve the problem of inconvenient construction of existing integral prefabricated assembly inspection wells. It can promote the development of valve well engineering towards industrialization, greening, and intelligence, which is in line with the national strategic policy of promoting the modernization of the construction industry and the construction of new urban infrastructure. It has significant technological advancement, economic benefits, and social benefits.

[0005] The technical solution of this application is: A prefabricated assembly valve well structure includes a first prefabricated well chamber and a second prefabricated well chamber arranged symmetrically; a first installation channel is provided between the side walls of the first prefabricated well chamber and the second prefabricated well chamber; a socket steel plate is inserted into the first installation channel and multiple first connecting steel bars are provided; the socket steel plate has an installation port, and two of the installation ports are connected to pipes.

[0006] As one technical solution of this application, multiple first connecting steel bars are welded from bottom to top between the side walls of the first prefabricated well chamber and the second prefabricated well chamber, and are distributed on the opposite sides of the socket steel plate.

[0007] As one technical solution of this application, the socket steel plate has T-shaped plug-in plates extending along the height direction on both opposite sides, and T-shaped grooves extending along the height direction are opened on the edge side plates of the first prefabricated well chamber and the second prefabricated well chamber, and the T-shaped plug-in plates are inserted into the T-shaped grooves.

[0008] As one technical solution of this application, a flange plate is provided on the outer peripheral wall of the pipeline, and the flange plate is welded to the socket steel plate.

[0009] As one technical solution of this application, the length of the socket steel plate is less than the height of the sidewalls of the first prefabricated well chamber and the second prefabricated well chamber.

[0010] As one technical solution of this application, a steel template is fitted onto the pipeline. The steel template is installed on the inner and outer walls of the first precast well chamber and the second precast well chamber by multiple fixing bolts. The steel template is provided with grouting holes for injecting concrete into the side walls of the first precast well chamber and the second precast well chamber.

[0011] As one technical solution of this application, a second installation channel is provided between the bottom plates of the first prefabricated well chamber and the second prefabricated well chamber, and multiple second connecting steel bars are provided in the second installation channel.

[0012] As one technical solution of this application, the bottom plate edges of the first precast well chamber and the second precast well chamber are both set as stepped structures, and together they form a stepped cavity, which is filled with micro-expansion concrete.

[0013] As one technical solution of this application, the upper part of the inner wall of the stepped cavity is provided with a water-swellable rubber strip.

[0014] A construction method for a prefabricated assembled valve well structure as described above includes the following steps: Subbase construction: After the earthwork is compacted according to the design specifications, the subbase is poured. After the subbase reaches the specified strength, the installation edge line is marked on the subbase. Installation of prefabricated valve wells: After the first prefabricated well chamber and the second prefabricated well chamber are transported to the site, they are hoisted into place. The first prefabricated well chamber and the second prefabricated well chamber are finely adjusted according to the position of the installation edge line on the cushion layer. Socket steel plate installation: Install the pre-made socket steel plate into the T-shaped groove reserved on the first prefabricated manhole and the second prefabricated manhole; make fine adjustments to the socket steel plate according to the installation position of the pipeline, and temporarily fix the socket steel plate, the first prefabricated manhole and the second prefabricated manhole; Welding of the first connecting steel bar and the second connecting steel bar: The first connecting steel bar and the second connecting steel bar reserved on the first precast well chamber and the second precast well chamber are paired and welded together according to the lap length specified in the specification; Install pipes and valves: Install valves and fix them after welding the flanges to the socket steel plate on the pipes; Sealing the bottom plate of the well chamber: The bottom plate area of ​​the first precast well chamber and the second precast well chamber is roughened in advance. After installing water-swellable rubber strips on the stepped structure at the edge of the bottom plate, micro-expansion concrete is poured to seal the bottom plate of the first precast well chamber and the second precast well chamber. Enclosure of the manhole sidewall: Steel formwork is installed through the bolt mounting holes reserved in the first and second prefabricated manholes, and grouting is performed from the grouting holes at the bottom of the steel formwork until completion; after curing, the steel formwork is removed.

[0015] The beneficial effects of this application are: (1) This application provides a prefabricated assembly valve well structure, which reduces the weight of the assembly well by prefabricating and assembling the first prefabricated well chamber and the second prefabricated well chamber, making it easier to transport and install, and enabling efficient construction and installation of large prefabricated valve wells.

[0016] (2) This application provides a construction method based on a prefabricated assembled valve well structure. By adopting a construction process of prefabricating and assembling a first prefabricated well chamber and a second prefabricated well chamber, the weight of the assembled well is reduced, making it easier to transport and install. This enables efficient construction and installation of large assembled valve wells. At the same time, through a series of combined processes, including a stepped base plate, water-swellable rubber strips, pouring micro-expansion concrete, and installing socket steel plates and welding grouting to the pipe flange plates on the well chamber sidewalls, the sealing performance of the prefabricated valve well is guaranteed, the risk of leakage is reduced, and the overall seepage prevention performance of the structure is improved. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the prefabricated assembled valve well structure provided in the first embodiment of this application; Figure 2 This is a first-angle schematic diagram of the prefabricated assembled valve well structure provided in the first embodiment of this application; Figure 3 This is a second-angle schematic diagram of the prefabricated assembled valve well structure provided in the first embodiment of this application; Figure 4 This is a partial structural diagram of the prefabricated assembled valve well structure provided in the first embodiment of this application; Figure 5 This is a schematic diagram of the steel formwork structure provided in the first embodiment of this application; Figure 6 This is a schematic diagram of the socket steel plate structure provided in the first embodiment of this application; Figure 7 A schematic diagram of the base plates of the first prefabricated well chamber and the second prefabricated well chamber provided in the first embodiment of this application.

[0019] Icons: 1-First precast well chamber; 2-Second precast well chamber; 3-Socket steel plate; 4-First connecting steel bar; 5-Installation port; 6-Pipe; 7-T-shaped plug plate; 8-Steel formwork; 9-Grouting hole; 10-Second connecting steel bar; 11-Micro-expansion concrete; 12-Water-swellable rubber strip. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this application, it should be noted that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only used to facilitate the description of this application and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0024] Furthermore, in this application, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Moreover, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0027] First embodiment: Please refer to Figure 1 (Refer to) Figures 2 to 7 This embodiment provides a prefabricated assembled valve well structure, which is suitable for the construction and installation of valve well structures in water supply, drainage, gas, and heating pipeline systems, and is also suitable for the construction and installation of large valve well structures with steel pipes as the material of the pipes 6. It includes a first prefabricated well chamber 1 and a second prefabricated well chamber 2 arranged symmetrically. A first installation channel is provided between the side walls of the first prefabricated well chamber 1 and the second prefabricated well chamber 2. A socket steel plate 3 is inserted into the first installation channel, and multiple first connecting steel bars 4 are provided. The socket steel plate 3 has installation openings 5, and two installation openings 5 ​​are connected to pipes 6. A second installation channel is provided between the bottom plates of the first prefabricated well chamber 1 and the second prefabricated well chamber 2, and multiple second connecting steel bars 10 are provided in the second installation channel.

[0028] The socket steel plate 3 is a 2mm thick steel plate, with T-shaped insertion plates 7 extending along the height direction on both opposite sides. T-shaped grooves extending along the height direction are formed on the edge side plates of the first precast manhole 1 and the second precast manhole 2, and the T-shaped insertion plates 7 are inserted into these grooves. A flange plate is provided on the outer peripheral wall of the pipe 6, and the flange plate is welded to the socket steel plate 3. The length of the socket steel plate 3 is slightly less than the height of the side walls of the first precast manhole 1 and the second precast manhole 2, so that the socket steel plate 3 can have a protective layer after the side wall grouting is completed. In addition, a steel template 8 is fitted onto the pipe 6. The steel template 8 is installed on the inner and outer walls of the first precast well chamber 1 and the second precast well chamber 2 by multiple fixing bolts. The steel template 8 is provided with grouting holes 9 for injecting concrete into the side walls of the first precast well chamber 1 and the second precast well chamber 2, thereby sealing the well chamber wall by grouting.

[0029] It should be noted that multiple first connecting steel bars 4 are welded from bottom to top between the side walls of the first precast well chamber 1 and the second precast well chamber 2, and are distributed on the opposite sides of the socket steel plate 3.

[0030] Meanwhile, the bottom slab edges of both the first precast well chamber 1 and the second precast well chamber 2 are designed with a stepped structure, which together form a stepped cavity filled with micro-expansion concrete 11; and a water-swellable adhesive strip 12 is provided on the upper part of the inner wall of the stepped cavity. The bottom slabs of the first precast well chamber 1 and the second precast well chamber 2 are sealed by the water-swellable adhesive strip 12 and the cast-in-place micro-expansion concrete 11.

[0031] The first prefabricated well chamber 1 and the second prefabricated well chamber 2 are prefabricated structures, symmetrically arranged, and identical in structure and specifications. This prefabricated assembly structure of the first and second prefabricated well chambers 1 and 2 reduces the weight of the assembled well, facilitating transportation and installation, and enabling efficient construction and installation of large prefabricated valve wells. Simultaneously, a series of combined processes, including a stepped base plate, water-swellable rubber strips 12, pouring micro-expansion concrete 11, and grouting the welded flanges of the pipes 6 onto the well chamber sidewalls, ensure the sealing performance of the prefabricated valve well, reduce the risk of leakage, and improve the overall seepage prevention performance of the structure. Furthermore, the well chambers are prefabricated structures, with bolt mounting holes in the walls for connecting to steel formwork 8, allowing the steel formwork 8 to be reused, making it environmentally friendly.

[0032] Second embodiment: In this embodiment, a construction method based on the prefabricated assembled valve well structure in the first embodiment is provided, which includes the following steps: Subbase construction: After the earthwork is compacted according to the design specifications, the subbase is poured. The subbase must be flat and clean. After the subbase reaches the specified strength, the installation edge line is marked on the subbase. Installation of prefabricated valve wells: After transporting the first prefabricated well chamber 1 and the second prefabricated well chamber 2 to the site, they are hoisted into place. According to the position of the installation edge line on the subbase, the first prefabricated well chamber 1 and the second prefabricated well chamber 2 are finely adjusted. Installation of socket steel plate 3: Install the pre-made socket steel plate 3 into the T-shaped grooves reserved on the first prefabricated manhole 1 and the second prefabricated manhole 2; make minor adjustments to the socket steel plate 3 according to the installation position of the pipeline 6 so that the pipeline 6 can be installed smoothly in the future; after the socket steel plate 3 is installed, temporarily fix the socket steel plate 3, the first prefabricated manhole 1, and the second prefabricated manhole 2; Welding of the first connecting steel bar 4 and the second connecting steel bar 10: The first connecting steel bar 4 and the second connecting steel bar 10 reserved on the first precast well chamber 1 and the second precast well chamber 2 are paired and welded together according to the lap length specified in the specification. Install pipe 6 and valve: Install flange plate on pipe 6, and weld the flange plate to the socket steel plate 3, then install and fix the valve; Sealing the bottom plate of the well chamber: The bottom plate areas of the first precast well chamber 1 and the second precast well chamber 2 are roughened in advance. After installing water-swellable rubber strips 12 on the stepped structure at the edge of the bottom plate, micro-expansion concrete 11 is poured to seal the bottom plate of the first precast well chamber 1 and the second precast well chamber 2. Enclosure of the manhole sidewall: Steel formwork 8 is installed through the bolt mounting holes reserved in the first precast manhole 1 and the second precast manhole 2, and grouting is carried out from the grouting hole 9 at the bottom of the steel formwork 8 until completion; after curing, the steel formwork 8 is removed.

[0033] In summary, this application provides a construction method based on a prefabricated assembled valve well structure. By employing a construction process that prefabricates and assembles a first prefabricated well chamber 1 and a second prefabricated well chamber 2, the weight of the assembled well is reduced, facilitating transportation and installation, and enabling efficient construction and installation of large prefabricated valve wells. Simultaneously, through a series of combined processes including a stepped base plate, water-swellable rubber strips 12, pouring micro-expansion concrete 11, and grouting the flange plates of the pipes 6 and the socketed steel plates installed on the well chamber sidewalls, the sealing performance of the prefabricated valve well is ensured, the risk of leakage is reduced, and the overall seepage prevention performance of the structure is improved.

[0034] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A pre-fabricated valve pit structure, characterized by, The first prefabricated well chamber and the second prefabricated well chamber are oppositely arranged, and a first installation channel is arranged between the sidewalls of the first prefabricated well chamber and the second prefabricated well chamber; a socket steel plate is inserted into the first installation channel, and a plurality of first connecting steel bars are arranged in the first installation channel; the socket steel plate is provided with installation openings, and two installation openings are connected with a pipeline.

2. The precast valved manhole structure of claim 1, wherein, The plurality of first connecting steel bars are welded from bottom to top between the sidewalls of the first prefabricated well chamber and the second prefabricated well chamber, and are distributed on opposite sides of the socket steel plate.

3. The pre-fabricated valve chamber structure according to claim 1, wherein, The socket steel plate is provided with a T-shaped insertion plate extending in the height direction on each of the opposite sides, and the first prefabricated well chamber and the second prefabricated well chamber are each provided with a T-shaped groove extending in the height direction on the edge side plate.

4. The pre-fabricated valve chamber structure according to claim 1, wherein, The pipeline is provided with a flange plate on the outer peripheral wall, and the flange plate is welded with the socket steel plate.

5. The pre-fabricated valve chamber structure according to claim 1, wherein, The length of the socket steel plate is less than the height of the sidewalls of the first prefabricated well chamber and the second prefabricated well chamber.

6. The pre-fabricated valve chamber structure according to claim 1, wherein, A steel formwork is sleeved on the pipeline, and the steel formwork is installed on the inner sidewall and the outer sidewall of the first prefabricated well chamber and the second prefabricated well chamber by a plurality of fixing bolts, and a grouting hole is formed in the steel formwork for pouring concrete into the sidewall of the first prefabricated well chamber and the second prefabricated well chamber.

7. The prefabricated valve chamber structure according to claim 1, characterized in that, A second installation channel is arranged between the bottom plates of the first prefabricated well chamber and the second prefabricated well chamber, and a plurality of second connecting steel bars are arranged in the second installation channel.

8. The pre-fabricated valve chamber structure according to claim 1, wherein, The bottom plate edges of the first prefabricated well chamber and the second prefabricated well chamber are arranged in a stepped structure, and together form a stepped cavity, and the stepped cavity is filled with micro-expanding concrete.

9. The pre-fabricated valve chamber structure according to claim 8, wherein, The upper part of the inner sidewall of the stepped cavity is provided with a water-swelling adhesive tape.

10. A method of construction based on the prefabricated valve well structure according to any one of claims 1 to 9, characterized by The method comprises the following steps: Paving a cushion layer: compacting the earthwork according to the design specification, and then pouring the cushion layer; after the cushion layer reaches the specified strength, the installation boundary line is laid out on the cushion layer; Prefabricated valve well installation: after the first prefabricated well chamber and the second prefabricated well chamber are transported to the site, they are hoisted and positioned; according to the position of the installation boundary line on the cushion layer, the first prefabricated well chamber and the second prefabricated well chamber are fine-tuned; Socket steel plate installation: the socket steel plate prepared in advance is installed in the T-shaped groove reserved on the first prefabricated well chamber and the second prefabricated well chamber; according to the installation position of the pipeline, the socket steel plate is fine-tuned, and the socket steel plate, the first prefabricated well chamber and the second prefabricated well chamber are temporarily fixed; First connecting steel bar and second connecting steel bar welding: the first connecting steel bar and the second connecting steel bar reserved on the first prefabricated well chamber and the second prefabricated well chamber are paired and welded according to the specified lap length; Pipeline and valve installation: the flange plate is arranged on the pipeline, and after the flange plate and the socket steel plate are welded and connected, the valve is installed and fixed; Well chamber bottom plate sealing: the first prefabricated well chamber and the second prefabricated well chamber are subjected to roughening treatment in advance, and micro-expansion concrete is poured after water-swelling adhesive strips are installed on the stepped structures at the edges of the bottom plates, so as to seal the bottom plates of the first prefabricated well chamber and the second prefabricated well chamber; Well chamber side wall sealing: steel formworks are installed through bolt mounting holes reserved in the first prefabricated well chamber and the second prefabricated well chamber, grouting is performed from grouting holes in the lower parts of the steel formworks until completion, and the steel formworks are removed after curing is completed.

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