A process for the relocation of underground pipelines

Abstract

The application discloses a kind of for underground pipeline's improvement construction process, it is related to pipeline construction technical field.It includes the following steps:S1, check pipeline condition;S2, flatten site, high-pressure rotary jet pile is constructed on site;S3, insert and drive steel sheet pile, and excavate foundation pit;S4, remove old pipeline, transport pipeline meeting standard to new pipeline;S5, first section of pipeline is in foundation pit and is installed in place;S6, positioning plate is arranged on the side of first section of pipeline, positioning plate extends to the position of second section of steel pipe, and inclined support is arranged between positioning plate and foundation pit;S7, second section of pipeline is placed between two positioning plates and is connected with first section of pipeline;S8, second section of pipeline is fixed, and positioning plate and inclined support are removed;S9, continue to install according to the steps of S6 to S8;S10, backfilling by layers.The application places pipeline on positioning plate when butt joint pipeline by setting positioning plate on the side of pipeline, so that two sections of pipeline can be coaxial quickly, reduce butt joint difficulty, and improve construction efficiency.

Description

Technical Field

[0001] This invention relates to the field of pipeline construction technology, and in particular to a relocation construction process for underground pipelines. Background Technology

[0002] Urban underground pipelines mainly include water supply and drainage pipelines, gas pipelines, and power and communication pipelines within the city, and are important infrastructure to ensure the operation of the city. However, with the acceleration of urbanization and the increasing number of underground facilities such as underground passages and subways, existing underground pipelines have become an unavoidable challenge, usually requiring relocation of existing underground pipelines to make room for other underground facilities.

[0003] When relocating underground pipelines, it is necessary to connect the pipelines. This requires hoisting equipment to lift the pipelines and manual assistance to connect them. However, since the pipelines are located in trenches, the operators of the hoisting equipment often cannot observe the situation in the trenches well, which makes it easy for the pipelines to be misaligned during connection and difficult to connect quickly. In addition, the pipelines are also easily affected by natural winds during hoisting, causing them to sway and increasing the difficulty of connection. Summary of the Invention

[0004] The main objective of this invention is to provide a construction process for relocating underground pipelines to solve the above-mentioned problems.

[0005] To achieve the above objectives, the present invention provides a construction process for relocating underground pipelines, comprising the following steps:

[0006] S1. Based on the drawings, verify the quantity, direction, burial depth and construction method of existing underground pipelines and determine whether there are any undiscovered pipelines.

[0007] S2. Level the site and install high-pressure jet grouting piles on the new site to reinforce the foundation to a certain depth.

[0008] S3. Drive steel sheet piles according to the location of the new pipeline and the depth of the foundation pit. After the steel sheet pile construction is completed, excavate the foundation pit.

[0009] S4. Remove the old pipeline and inspect the pipes in the old pipeline. Transport the pipes that meet the standards to the new pipeline.

[0010] S5. Lower the first section of pipe into the pit and install the first section of pipe in place;

[0011] S6. Positioning plates inclined towards the same side of the sheet piles are installed on both sides of the first section of the pipe. The bottom of the positioning plate is fixedly connected to the bottom of the foundation pit and extends to the position of the second section of the steel pipe. An inclined support is set between the positioning plate and the foundation pit.

[0012] S7. Place the second section of pipe between the two positioning plates and move the second section of pipe horizontally to connect it with the first section of pipe;

[0013] S8. Fix the second section of pipe in the foundation pit and remove the positioning plate and diagonal support;

[0014] S9. Install the subsequent pipes following the steps from S6 to S8;

[0015] S10. Backfill and compact the soil in layers.

[0016] Further, in step S6, the positioning plate is fixed to the bottom of the pit by a connector; the positioning plate includes a horizontal part and a rotating part fixed to the bottom of the pit, the horizontal part is provided with fixing holes on both sides, the rotating part is disposed above the horizontal part and rotatably connected to the horizontal part, the rotating part is provided with a groove adapted to the positioning plate, and threaded holes are symmetrically provided on both sides of the groove.

[0017] Furthermore, the positioning plate is provided with an opening located at the connection between the two pipe sections, and the size of the opening is adapted to the pipe diameter.

[0018] Furthermore, the lower side of the positioning plate is provided with multiple connection ports for installing pipe supports.

[0019] Furthermore, in step S10, fine soil is first used to backfill to 500mm above the top of the pipe, and then the original soil is used to backfill to the ground. During backfilling, light compaction equipment is used to compact the cavity on both sides of the pipe and within 500mm above the top of the pipe, and a road roller is used to compact the ground.

[0020] Furthermore, the positioning plate is coated with pigment, and the pipeline to be installed is coated with pigment of the same color as the positioning plate. The pigment colors on the positioning plates of different pipelines in the same construction site are different.

[0021] This invention uses positioning plates on both sides of the pipe to quickly make the two pipe sections coaxial when connecting them by placing the pipes on the positioning plates, thus reducing the difficulty of connection. At the same time, the workers can observe the connection from both sides of the positioning plates. The positioning plates also protect the workers and prevent accidents such as pipes falling to the sides during hoisting from causing the pipes to slip and cause safety accidents. Attached Figure Description

[0022] Figure 1 This is a schematic diagram inside the foundation pit of a construction process for relocating underground pipelines according to the present invention.

[0023] Figure 2 This is a schematic diagram of a construction process for relocating underground pipelines according to the present invention. Figure 1 .

[0024] Figure 3 This is a schematic diagram of a construction process for relocating underground pipelines according to the present invention. Figure 2 .

[0025] Figure 4 This is a schematic diagram of a connector used in the relocation construction process of underground pipelines according to the present invention.

[0026] Wherein, 1-first section of pipe; 2-positioning plate; 201-diagonal support; 202-opening; 203-connection port; 3-connector; 301-horizontal part; 302-rotating part; 303-fixing hole. Detailed Implementation

[0027] To achieve the above objectives and effects, the technical means and structure adopted by the present invention will be described in detail with reference to the accompanying drawings, focusing on the features and functions of the preferred embodiments of the present invention.

[0028] like Figure 1-4 As shown, this invention provides a construction process for relocating underground pipelines, including the following steps:

[0029] S1. Verify the quantity, direction, burial depth, and construction method of pipelines according to the drawings, and determine whether there are any undiscovered pipelines.

[0030] In practice, the underground pipelines are first non-destructively detected using ground-penetrating radar to record data such as the pipeline diameter, depth, and direction. Then, exploratory boreholes are excavated manually using a Luoyang shovel to verify the detected data.

[0031] S2. Level the site and install high-pressure jet grouting piles on the site to reinforce the foundation to a certain depth using jet grouting.

[0032] S3. Drive steel sheet piles according to the pipeline location and the depth of the foundation pit. After the steel sheet pile construction is completed, excavate the foundation pit.

[0033] S4. Remove the old pipeline and inspect the pipes in the old pipeline. Transport the pipes that meet the standards to the new pipeline.

[0034] In practice, non-destructive testing is performed on the pipes in the old pipeline to assess whether their appearance and wall thickness have changed, whether there is corrosion, and whether their structure is intact. Pipes that meet the standards or are repaired to meet the standards are transported to the new pipeline and become part of the new pipeline.

[0035] S5. Lower the first section of pipe 1 into the foundation pit and install the first section of pipe 1 into place;

[0036] S6. Positioning plates 2 inclined towards the same side of the sheet piles are arranged on both sides of the first section of pipe 1. The bottom of the positioning plate 2 is fixedly connected to the bottom of the foundation pit through the connector 3 and extends to the position of the second section of steel pipe. An inclined support 201 is set between the positioning plate 2 and the foundation pit. One end of the inclined support 201 is connected to the positioning plate 2, and the other end abuts against the corner of the foundation pit and is fixedly connected to the foundation pit.

[0037] The connector 3 includes a horizontal part 301 and a rotating part 302 fixed to the bottom of the pit. The horizontal part 301 has fixing holes 303 on both sides. The rotating part 302 is located above the horizontal part 301 and is rotatably connected to the horizontal part 301. The rotating part 302 has a groove that is compatible with the positioning plate 2. Threaded holes are symmetrically arranged on both sides of the groove.

[0038] In practice, firstly, anchor bolts are installed at the preset positions at the bottom of the foundation pit on both sides of the pipeline. Then, the fixing holes 303 on the connector 3 are fitted onto the anchor bolts, and the nuts are fitted and tightened to fix the connector 3. Then, the positioning plate 2 is inserted into the groove, and the bolts are inserted and tightened into the threaded holes to fix the positioning plate 2 and the connector 3. Next, the positioning plate 2 is rotated upward to make it contact the pipeline. An inclined support 201 is set between the positioning plate 2 and the foundation pit. One end of the inclined support 201 is threaded to the positioning plate 2, and the other end is abutted at the corner of the foundation pit and connected to the foundation pit to fix the positioning plate 2.

[0039] S7. Place the second section of pipe between the two positioning plates 2 and move the second section of pipe horizontally to connect it with the first section of pipe 1.

[0040] In practice, the second section of pipe is placed between two positioning plates 2 using hoisting equipment. Since both positioning plates 2 are tangent to the first section of pipe 1 and the second section of pipe, the two sections of pipe are coaxial. Then, the second section of pipe is moved horizontally to connect the joints of the two sections of pipe.

[0041] S8. Fix the second section of pipe in the pit and remove the positioning plate 2, connector 3 and diagonal support 201.

[0042] S9. Install the subsequent pipelines following the steps from S6 to S8.

[0043] In practice, after the second section of pipe is installed, the connector 3 at the third section of pipe can be installed first. After the connector 3 is installed, the bolts fixing the positioning plate 2 and the diagonal support 201 are removed, and the positioning plate 2 is moved horizontally to both sides of the second and third sections of pipe. When moving the positioning plate 2, the connector 3 at the third section of pipe is rotated to a preset angle so that the positioning plate 2 can be directly inserted into the groove of the connector 3 during movement. After the positioning plate 2 is moved to the preset position, the connector 3 that is no longer needed is removed, and subsequent construction steps are continued. This simplifies the removal and installation steps of the positioning plate 2 and improves the construction speed. When the pipe diameter is too large, resulting in a large positioning plate 2, hoisting equipment can be used to assist in the installation of the positioning plate 2; when the pipe diameter is small, and the positioning plate 2 is small, the positioning plate 2 can be moved manually to the next position.

[0044] S10. Backfill and compact the soil in layers.

[0045] In practice, fine soil is first used to backfill to 500mm above the top of the pipe, and then the original soil is used to backfill to the ground level. During backfilling, light compaction equipment is used to compact the area on both sides of the pipe and within 500mm above the top of the pipe, and a road roller is used to compact the ground. After the backfilling is completed, the sheet piles are pulled out.

[0046] As a preferred embodiment, based on the above embodiment, one or more openings 202 can be provided on the positioning plate 2. The openings 202 are located at the connection between the two pipe sections, and the size of the openings 202 is adapted to the pipe diameter. This allows operators to easily observe whether the pipe connection is intact from both sides of the positioning plate 2. When the pipe is connected by a flange, the flange can also extend out of the positioning plate 2 through the opening 202, allowing workers to connect the pipe from both sides of the positioning plate 2. This protects workers and prevents injury from accidental rolling of the pipe to both sides before it is fully secured.

[0047] As a preferred embodiment, based on the above embodiment, one or more connection ports 203 can be provided on the lower side of the positioning plate 2, and workers can install pipe supports at the connection ports 203 to support and fix the pipes.

[0048] As a preferred embodiment, based on the above embodiments, the positioning plate 2 can also be coated with paint, and the pipe to be installed can be coated with paint of the same color as the positioning plate 2. This facilitates workers in quickly identifying the location to be moved when transporting the old pipe to the new pipe location. When there are multiple relocated pipelines at the same construction site, the color of the paint on the positioning plate 2 for different pipelines is different, thereby avoiding workers from moving the pipeline to the wrong location due to unfamiliarity with the site or communication errors, thus increasing working time.

[0049] The above description is only a preferred embodiment of the present invention and not all embodiments. Anyone should know that structural changes made under the guidance of the present invention, and any technical solutions that are the same as or similar to the present invention, are within the protection scope of the present invention.

Claims

1. A construction technique for relocating underground pipelines, characterized in that, Includes the following steps: S1. Based on the drawings, verify the quantity, direction, burial depth and construction method of existing underground pipelines and determine whether there are any undiscovered pipelines. S2. Level the site and install high-pressure jet grouting piles on the new site to reinforce the foundation to a certain depth. S3. Drive steel sheet piles according to the location of the new pipeline and the depth of the foundation pit. After the steel sheet pile construction is completed, excavate the foundation pit. S4. Remove the old pipeline and inspect the pipes in the old pipeline. Transport the pipes that meet the standards to the new pipeline. S5. Lower the first section of pipe into the pit and install the first section of pipe in place; S6. Positioning plates inclined towards the same side of the sheet piles are installed on both sides of the first section of the pipe. The bottom of the positioning plate is fixedly connected to the bottom of the foundation pit and extends to the position of the second section of the steel pipe. An inclined support is set between the positioning plate and the foundation pit. S7. Place the second section of pipe between the two positioning plates and move the second section of pipe horizontally to connect it with the first section of pipe; S8. Fix the second section of pipe in the foundation pit and remove the positioning plate and diagonal support; S9. Install the subsequent pipes following the steps from S6 to S8; S10. Backfill and compact the soil in layers; The positioning plate is fixed to the bottom of the pit by a connector; the connector includes a horizontal part and a rotating part fixed to the bottom of the pit, the horizontal part is provided with fixing holes on both sides, the rotating part is provided above the horizontal part and rotatably connected to the horizontal part, the rotating part is provided with a groove adapted to the positioning plate, and threaded holes are symmetrically provided on both sides of the groove. The positioning plate is provided with one or more openings, which are located at the connection between two pipe sections, and the size of the openings is adapted to the pipe diameter.

2. The relocation construction process for underground pipelines as described in claim 1, characterized in that, The lower side of the positioning plate is also provided with one or more connection ports for installing pipe supports.

3. The relocation construction process for underground pipelines as described in claim 1, characterized in that, In step S10, fine soil is first used to backfill to 500mm above the top of the pipe, and then the original soil is used to backfill to the ground. During backfilling, light compaction equipment is used to compact the cavity on both sides of the pipe and within 500mm above the top of the pipe, and a road roller is used to compact the ground.

4. A construction process for relocating underground pipelines as described in any one of claims 1-3, characterized in that, The positioning plate is coated with pigment, and the pipeline to be installed is coated with pigment of the same color as the positioning plate. The pigment color on the positioning plate of different pipelines in the same construction site is different.

Images