Method for connecting new pipeline with old well chamber under continuous flow of old pipeline

Abstract

This invention discloses a method for connecting a new pipeline to an old manhole without interrupting the flow of wastewater in an existing pipeline. The method includes the following steps: S1, constructing a working well around the old manhole; S2, constructing the new pipeline by pipe jacking; S3, providing a partition plate and installing it inside the old manhole to divide it into a dry working area and a flow area; S4, breaking down the outer wall of the old manhole to connect the new pipeline to the dry working area; S5, temporarily sealing the upstream / downstream old pipeline and removing the partition plate; S6, permanently sealing the upstream / downstream old pipeline after the new pipeline is connected. This invention, by using a partition plate inside the old manhole to divide it into a dry working area and a flow area, significantly reduces the risk of upstream sewage backflow and waterlogging in the old sewage pipeline.

Description

Technical Field

[0001] This invention relates to the field of connecting old and new pipelines, and specifically to a method for connecting a new pipeline to an old manhole without interrupting the flow of the old pipeline. Background Technology

[0002] With the continuous advancement of urban infrastructure construction, the upgrading, expansion, and relocation projects of municipal sewage pipe networks are increasing. As a core component of the urban drainage system, the quality of sewage pipeline relocation directly affects the stability of urban sewage discharge, environmental protection, and the normal production and lives of surrounding residents. In municipal sewage pipeline relocation projects, the connection between old and new pipelines is a crucial process. The safety, efficiency, and environmental impact of the connection operation are important indicators for evaluating the quality of the relocation project. Currently, the industry generally uses traditional dry-work connection methods for connecting old and new sewage pipelines. The core idea of ​​this method is to use airbags to block the upstream and downstream sections of the old pipeline, cutting off the sewage flow and creating a waterless working environment at the connection point of the old and new pipelines. Then, a manhole is built at the connection point, and construction workers enter the manhole to cut the old pipeline to connect the old and new pipelines, thus completing the connection operation. In actual municipal construction scenarios, for some main sewage pipelines that play an important drainage role, if the connection is carried out by blocking and cutting off the flow throughout, it may lead to upstream sewage backflow, water accumulation and flooding, and thus cause a series of problems such as environmental pollution and public health safety. Summary of the Invention

[0003] This invention discloses a method for connecting a new pipeline to an old manhole without interrupting the flow of wastewater in an existing pipeline. By installing a partition plate inside the old manhole, the old manhole is divided into a dry working area and a flow area. During construction to connect the new pipeline to the dry working area, the upstream and downstream old pipelines are connected within the connection area. The old pipeline is in constant operation, and only a brief temporary blockage is required when connecting the new and old pipelines. This significantly reduces the risk of upstream sewage backflow and waterlogging in the old sewage pipeline.

[0004] This invention discloses a method for connecting a new pipeline to an old manhole without interrupting the flow of an existing pipeline. The upstream and downstream existing pipelines are connected through the old manhole. The method comprises the following steps: S1. An opening is made outward from the old well chamber to form a working well surrounding the old well chamber; S2. The new pipeline is jacked into the working well until the opening of the new pipeline reaches the outer wall of the old well chamber. S3. Provide a partition plate and install the partition plate in the old manhole to divide the old manhole into a dry working area and a flow area. The upstream old pipe and the downstream old pipe are both connected to the flow area. The side of the old manhole closer to the new pipe is the dry working area. After installing the partition plate, remove the residual sewage in the dry working area. S4. Break down the outer wall of the old manhole where it abuts the new pipeline, so as to connect the new pipeline to the dry working area; S5. Temporarily seal the upstream old pipeline / downstream old pipeline and remove the partition plate to connect the new pipeline with the downstream old pipeline / upstream old pipeline to form a new pipeline; S6. After the new pipeline is connected, the upstream old pipeline / downstream old pipeline shall be permanently sealed.

[0005] A further improvement of the present invention is that, after the new pipe is pushed against the outer wall of the old manhole in step S2, the portion of the new pipe located in the working well is fully enclosed by means of full encapsulation and rebar installation, and the full encapsulation is completed to form a sealed connection with the outer wall of the old manhole.

[0006] A further improvement of the present invention is that, after the partition plate is installed in step S3, the gap between the partition plate and the inner wall of the old well chamber is sealed with water.

[0007] A further improvement of the present invention is that, in step S6, after the new pipeline is connected, the permanent sealing of the upstream old pipeline / downstream old pipeline specifically includes the following steps: S61. Reinstall the partition plate in the old well chamber, at which time the new pipe and the downstream old pipe / upstream old pipe connected to it are separated into the flow area, and the upstream old pipe / downstream old pipe is located in the dry working area; S62. Construction personnel enter the dry work area and fill the upstream / downstream old pipeline with concrete. After the concrete is formed, the upstream / downstream old pipeline is permanently sealed. A further improvement of the present invention is that a ladder is also provided, which is installed on the side of the partition plate near the dry working area. When performing step S4 to break the outer wall of the dry working area where the new pipe abuts, the construction personnel enter the dry working area through the ladder and break the outer wall of the old manhole.

[0008] A further improvement of the present invention is that a temporary airbag is provided, in which the temporary airbag is used to temporarily block the upstream old pipe / downstream old pipe in step S5; after the new pipe is connected to the downstream old pipe / upstream old pipe, the temporary airbag is removed.

[0009] This invention discloses a method for connecting a new pipeline to an old manhole without interrupting the flow of wastewater in an existing pipeline. By installing a partition plate inside the old manhole, the old manhole is divided into a dry working area and a flow area. During construction to connect the new pipeline to the dry working area, the upstream and downstream old pipelines are connected within the connection area. The old pipeline operates normally, requiring only a brief temporary blockage when connecting the new and old pipelines. This significantly reduces the risk of upstream sewage backflow and waterlogging in the old sewage pipeline. Attached Figure Description

[0010] Figure 1 This is a plan view during step S2 of the present invention; Figure 2 For the present invention Figure 1 Cross-sectional view of aa in the middle; Figure 3 For the present invention Figure 1 Cross-sectional view of the middle section; Figure 4 This is a plan view during step S3 of the present invention; Figure 5 For the present invention Figure 4 Cross-sectional view of aa in the middle; Figure 6 For the present invention Figure 4 Cross-sectional view of the middle section; Figure 7 This is a plan view during step S4 of the present invention; Figure 8 For the present invention Figure 7 Cross-sectional view of aa in the middle; Figure 9 For the present invention Figure 7 Cross-sectional view of the middle section; Figure 10 This is a plan view of the site during the temporary closure. Figure 11 For the present invention Figure 10 Cross-sectional view of aa in the middle; Figure 12 For the present invention Figure 10 Cross-sectional view of the middle section; 1. Upstream old pipeline; 2. Downstream old pipeline; 3. New pipeline; 4. Working shaft; 5. Old manhole; 6. Full enclosure; 7. Waterproof casing; 71. Divider plate; 72. Ladder; 8. Waterproof sealing filler tape; 9. Temporary airbag. Detailed Implementation

[0011] like Figures 1-12 The diagram illustrates a method for connecting a new pipeline to an old manhole without interrupting flow in the old pipeline. The upstream and downstream old pipelines are connected through the old manhole. The connection method includes the following steps: S1. A working well 4 is formed by opening outward from the old well chamber 5 to surround the old well chamber 5; S2. The new pipe 3 is jacked into the working well 4 until the pipe opening of the new pipe 3 reaches the outer wall of the old well chamber 5. In this embodiment, the area of ​​the outer wall of the old well chamber 5 within the dry working area is greater than the area of ​​the area where the new pipeline 3 abuts.

[0012] S3. Provide a partition plate 71 and install the partition plate 71 in the old well chamber 5 to divide the old well chamber 5 into a dry working area and a flow area. The upstream old pipe 1 and the downstream old pipe 2 are both connected to the flow area. The side of the old well chamber 5 closest to the new pipe 3 is the dry working area. After installing the partition plate 71, remove the residual sewage in the dry working area. S4. Break the outer wall of the old well chamber 5 at the point where it abuts the new pipeline 3, so as to connect the new pipeline 3 to the dry working area; S5. Temporarily seal the upstream old pipeline 1 / downstream old pipeline 2 and remove the partition plate 71 to connect the new pipeline 3 with the downstream old pipeline 2 / upstream old pipeline 1 to form a new pipeline; S6. After the new pipeline is connected, the upstream old pipeline 1 and the downstream old pipeline 2 shall be permanently sealed.

[0013] In this embodiment, the new pipeline 3 is connected to the downstream old pipeline 2 to form a new pipeline. like Figures 1-3 As shown, in step S2, the portion of the new pipe 3 located inside the working well 4 is fully enclosed using reinforced concrete, and the full enclosure 6 is sealed to the outer wall of the old well chamber. By setting the full enclosure 6, the connection between the new pipe 3 and the old well chamber 5 is completely sealed, preventing water from leaking out from the connection between the new pipe 3 and the old well chamber 5 after the new pipe 3 is connected to the network.

[0014] like Figures 4-12 As shown, after installing the partition plate 71 in step S3, the gap between the partition plate and the inner wall of the old well chamber is sealed with water.

[0015] like Figures 10-12 As shown, in step S6, after the new pipeline is connected, the permanent sealing of the upstream old pipeline 1 / downstream old pipeline 2 specifically includes the following steps: S61. Reinstall the partition plate 71 in the old well chamber 4. At this time, the new pipe 3 and the downstream old pipe 2 / upstream old pipe 1 connected to it are separated into the flow area. The upstream old pipe 1 / downstream old pipe 2 are located in the dry working area. S62. Construction personnel enter the dry work area and fill the upstream old pipeline 1 / downstream old pipeline 2 with concrete. After the concrete is formed, the upstream old pipeline 1 / downstream old pipeline 2 is permanently sealed. like Figures 10-12 As shown, a ladder 72 is also provided. The ladder 72 is installed on the side of the partition plate 71 near the dry working area. When performing step S4 to break the outer wall of the dry working area where the new pipe 3 is abutting, the construction personnel enter the dry working area through the ladder 72 and break the outer wall of the old well chamber 5.

[0016] like Figures 10-12 As shown, a temporary airbag 9 is also provided. In step S5, the temporary airbag 9 is used to temporarily block the upstream old pipe 1 / downstream old pipe 2. After the new pipe 3 is connected to the downstream old pipe 2 / upstream old pipe 1, the upstream old pipe 1 / downstream old pipe 2 is abandoned and the temporary airbag 9 is removed.

[0017] Preferably, in this embodiment, as Figures 4-12 As shown, a steel casing 7 is also provided, and a partition plate 71 is fixed below the steel casing 7. The shape and size of the steel casing 7 are adapted to the inner wall of the old manhole 5. When installing the partition plate 71, the steel casing 7 is installed into the old manhole 5, ensuring that the outer wall of the steel casing 7 is tightly attached to the inner wall of the old manhole 5, and the bottom of the steel casing 7 is supported above the upstream old pipe 1 and the downstream old pipe 2. At this time, it is ensured that the bottom of the partition plate 71 can be tightly attached to the bottom of the old manhole 5, and that the dry working area and the flow area can be completely separated. By setting the steel casing 7, which is supported above the upstream old pipe 1 and the downstream old pipe 2 and is tightly attached to the old manhole 5, the installation of the partition plate 71 is made more stable, preventing the partition plate 71 from shifting due to water flow disturbance and other factors, which would cause water in the flow area to seep into the dry working area and affect subsequent construction.

[0018] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for connecting a new pipeline to an old manhole without interrupting flow in an existing pipeline, wherein the upstream and downstream existing pipelines are connected through the existing manhole, characterized in that, The connection method includes the following steps: S1. An opening is made outward from the old well chamber to form a working well surrounding the old well chamber; S2. The new pipe is driven into the working well using a pipe jacking method until the opening of the new pipe reaches the outer wall of the old well chamber. S3. Provide a partition plate and install the partition plate in the old manhole to divide the old manhole into a dry working area and a flow area. The upstream old pipe and the downstream old pipe are both connected to the flow area. The side of the old manhole closer to the new pipe is the dry working area. After installing the partition plate, remove the residual sewage in the dry working area. S4. Break down the outer wall of the old manhole where it abuts the new pipeline, so as to connect the new pipeline to the dry working area; S5. Temporarily seal the upstream old pipeline / downstream old pipeline and remove the partition plate to connect the new pipeline with the downstream old pipeline / upstream old pipeline to form a new pipeline; S6. After the new pipeline is connected, the upstream old pipeline / downstream old pipeline shall be permanently sealed.

2. The method for connecting a new pipeline to an old manhole without interrupting flow in the old pipeline as described in claim 1, characterized in that, After the new pipe is pushed against the outer wall of the old manhole in step S2, the portion of the new pipe located inside the working manhole is fully enclosed by adding reinforcing bars, and the full enclosed portion is sealed to the outer wall of the old manhole.

3. The method for connecting a new pipeline to an old manhole without interrupting flow in the old pipeline as described in claim 1, characterized in that, After installing the partition plate in step S3, the gap between the partition plate and the inner wall of the old well is sealed with a water-proof seal.

4. The method for connecting a new pipeline to an old manhole without interrupting flow in the old pipeline as described in claim 1, characterized in that, In step S6, after the new pipeline is connected, the permanent sealing of the upstream / downstream old pipeline specifically includes the following steps: S61. Reinstall the partition plate in the old well chamber, at which time the new pipe and the downstream old pipe / upstream old pipe connected to it are separated into the flow area, and the upstream old pipe / downstream old pipe is located in the dry working area; S62. Construction personnel enter the dry work area and fill the upstream / downstream old pipeline with concrete. After the concrete is formed, the upstream / downstream old pipeline is permanently sealed.

5. The method for connecting a new pipeline to an old manhole without interrupting flow in the old pipeline as described in claim 1, characterized in that, A ladder is also provided, which is installed on the side of the partition plate near the dry working area. When performing step S4 to break the outer wall of the dry working area where the new pipeline abuts, the construction personnel enter the dry working area through the ladder and break the outer wall of the old manhole.

6. The method for connecting a new pipeline to an old manhole without interrupting flow in the old pipeline as described in claim 1, characterized in that, A temporary airbag is also provided. In step S5, the temporary airbag is used to temporarily block the upstream old pipe / downstream old pipe. After the new pipe is connected to the downstream old pipe / upstream old pipe, the temporary airbag is removed.

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