HDPE pipe delivery track construction method

Abstract

This invention relates to the field of HDPE pipeline transportation technology, specifically to a method for constructing HDPE pipeline transportation tracks, comprising the following steps: S1. Leveling the site and filling in temporary wharves and cofferdams; S2. Constructing the track beam foundation; S31. Installing the horizontal section of the track beam; S32. Pouring the track beam on the land slope section; S33. Installing the track beam in the water entry section; S4. Installing a winch. This method effectively overcomes the shortcomings of high difficulty and low construction efficiency in constructing HDPE pipeline transportation tracks at the seaside.

Description

Technical Field

[0001] This invention relates to the field of HDPE pipeline transportation technology, and in particular to a method for constructing HDPE pipeline transportation tracks. Background Technology

[0002] Seawater cooling systems involve pumping seawater from intake pumping stations to onshore industrial facilities requiring significant heat exchange, such as oil refineries, before releasing it back into the ocean. HDPE (High Density Polyethylene) pipes are well-suited for this purpose due to their superior properties, including reliable connections, high impact resistance, excellent crack resistance, aging resistance, and corrosion resistance. However, the installation process for HDPE pipes is complex and involves numerous steps. First, welding and assembly are performed onshore to ensure secure connections between pipe sections. After onshore welding, the assembled pipe sections are transported from land to the sea before further offshore construction can commence, including floating, sinking, positioning, and final docking operations, until the entire pipe section installation is complete.

[0003] Currently, the common method for shipping HDPE pipes involves placing the pipes on a shipping trolley, which then moves along a shipping track, thus moving the HDPE pipes. During this process, it is crucial to ensure a smooth transition between pipe sections to avoid unnecessary damage. The construction of the HDPE pipe shipping track is key to maintaining smooth trolley operation. Because the HDPE pipe shipping track needs to be constructed near the coast, the unique geological conditions (loose surface soil of silt or clay) result in poor foundation bearing capacity. The track must not only support large-diameter (inner diameter exceeding 3m) and heavy-duty (pipe section length exceeding 5.5m, weight per meter exceeding 0.9t / m) HDPE pipes, but also ballast blocks and the shipping trolley. This places high demands on the load-bearing capacity of the shipping track. Furthermore, the track's slope continuously changes, making construction difficult, inefficient, and challenging to balance the tight construction schedule with high quality. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of high difficulty and low efficiency in constructing HDPE pipeline transport tracks at the seaside, and to provide a method for constructing HDPE pipeline transport tracks.

[0005] In a first aspect, the present invention provides a method for constructing an HDPE pipeline transport track, comprising the following steps:

[0006] S1. Level the site, fill temporary wharves on both sides of the track beam in the water inlet section, and fill temporary cofferdams between the two temporary wharves;

[0007] S2. Track beam foundation construction: Excavate the track beam foundation, compact it, and then replace it with crushed stone. For the land section, the track beam foundation is replaced with 1-1.5m thick stone. For the water section, the track beam foundation is replaced in two layers. First, a 0.5-0.75m thick layer of crushed stone is filled in, then a geotextile layer is laid on the crushed stone, and then another 0.5-0.75m thick layer of stone is filled in.

[0008] S31. Installation of horizontal track beams: The horizontal track beams are assembled from the first precast beams;

[0009] S32. Onshore slope section track beam pouring: The onshore slope section track beam adopts a variable slope ratio setting. First, the steel cage is tied in the foundation trench. After the steel cage is tied, the positioning steel plate is fixed on the top of the steel cage. The slope section track is welded on the positioning steel plate. The elevation of the slope section track is adjusted with the elevation of the positioning steel plate as a reference. After the track beam formwork is installed, the concrete is poured.

[0010] S33. Installation of track beams for water inlet section: The track beams for water inlet section are set with a fixed slope ratio and are spliced ​​together from second precast beams.

[0011] S4. Install the winch.

[0012] The HDPE pipe transport track construction method provided by this invention uses precast beams for both the horizontal section and the water inlet section. These beams can be prefabricated in the factory, reducing on-site construction workload and improving construction efficiency. After use, they can be dismantled and reused, saving construction costs.

[0013] Due to the variable slope design of the track beams on the land slope, using precast beams would be too costly and would require higher load-bearing capacity. Cast-in-place track beams offer better overall integrity, structural stability, and load-bearing capacity. Because of the variable slope design, positioning the track beams on the land slope is challenging. Therefore, a positioning steel plate is pre-fixed to the top of the reinforcing cage. This positioning plate acts as a marker, making it easier to control the slope ratio of the track beams during later concrete pouring, ensuring smooth track construction and preventing damage to the HDPE pipes due to track unevenness.

[0014] Because the foundation of the track beam in the water-entry section is more susceptible to the effects of seawater, its ground stability is worse. This method ensures the stability of the track foundation by replacing the gravel and stone in layers. In particular, a geotextile layer is laid in the water-entry section. This geotextile layer forms an isolation between the gravel and stone, preventing the gravel from sinking or the stone from floating, effectively enhancing the stability and bearing capacity of the track foundation. This allows it to reliably support large-diameter, heavy HDPE pipes and transport trolleys, preventing track settlement or deformation under load.

[0015] Preferably, S1 includes the following steps:

[0016] The site for the land section track beams was leveled according to the elevations of the horizontal section track beams and the land slope section track beams, and the foundation trench for the land section track beams was excavated.

[0017] Temporary wharves were built on both sides of the track beam in the water inlet section, geotextile was laid and facing stones were laid.

[0018] Starting from the filled temporary wharf, a temporary cofferdam is filled between the two temporary wharves. Stone blocks are laid on the outside of the temporary cofferdam for protection, and geotextile is laid on the inside of the temporary cofferdam for slope protection. The temporary cofferdam will temporarily enclose the sea side of the track beam in the water section.

[0019] Dewatering was carried out within the temporary cofferdam. After the water level dropped, the foundation trench for the track beams entering the water section was excavated.

[0020] By setting up temporary wharves on both sides of the track beam in the water-entry section, a safe and stable support was provided for the construction of the track in the water-entry section, and the direct impact of waves or tides on the construction area was reduced. A temporary cofferdam was built between the two temporary wharves to effectively prevent seawater intrusion, reduce the impact of waves on the construction site, and provide more stable construction conditions in the water. Dewatering operations were carried out within the cofferdam to ensure a lower water level, which facilitated trench excavation in a dry environment. This method of controlling the water level reduced construction difficulty and improved visibility and safety for workers. After the transport track was completed, excavators could be deployed to remove the temporary cofferdam and recover the rubble. The temporary wharves could be used as a berthing site for subsequent construction vessels and as a transport site for other structural construction, saving operating costs and reducing demolition costs.

[0021] Preferably, after excavating the track beam foundation in S2, the track beam foundation is compacted and a compaction test is conducted. The compaction degree of the track beam foundation is 85%-90%.

[0022] The compaction degree of the track beam foundation is required to reach 85%-90% and tests are conducted to ensure that the foundation compaction degree meets the design requirements. This helps to maintain the uniformity and density of the foundation and reduce the risk of uneven settlement in the future.

[0023] Preferably, the stone in S2 is 60-300KG stone, and the crushed stone is 1-8 inches in size.

[0024] This graded material selection method ensures that the base materials at different levels have sufficient load-bearing capacity and can effectively fill small gaps, reducing the risk of subsidence.

[0025] Preferably, S31 includes the following steps:

[0026] The first precast beam includes a first foundation and a first track fixedly connected to the top of the first foundation. One end of the first foundation is configured as a first tongue and groove, and the other end of the first foundation is configured as a second tongue and groove. Both the first tongue and groove and the second tongue and groove are provided with a first steel plate.

[0027] Connect two adjacent sections of the first foundation with tongue and groove joints, and weld the first force transmission steel bar to the first steel plate of the adjacent first tongue and groove joint and the second tongue and groove joint;

[0028] The first precast beams are spliced ​​together in sequence to form a horizontal track beam.

[0029] The adjacent first foundations are connected by a tongue and groove joint, ensuring a tight fit between two adjacent first foundations and forming a strong and continuous connection. This method is more stable than traditional simple splicing, effectively reducing loosening and displacement between the first precast beams, thereby improving the overall load-bearing capacity and deformation resistance of the track beam structure, and ensuring the safety and stability of the horizontal track beam section.

[0030] Preferably, a first embedded steel plate is fixedly installed on the top of the first foundation, and the first track is fixedly connected to the first foundation through the first embedded steel plate.

[0031] The first embedded steel plate facilitates the welding of the first track to the first embedded steel plate; the first embedded steel plate also facilitates alignment during the later assembly of the first precast beam, ensuring the accurate installation position of the first track and reducing alignment errors during later installation.

[0032] Preferably, S33 includes the following steps:

[0033] The second precast beam includes a second foundation and a second track fixedly connected to the top of the second foundation. One end of the second foundation is configured as a third tongue and groove, and the other end of the second foundation is configured as a fourth tongue and groove. Both the third tongue and groove and the fourth tongue and groove are provided with a second steel plate.

[0034] Connect two adjacent sections of the second foundation tongue and groove, and weld the second force transmission steel bars to the second steel plates of the adjacent third and fourth tongue and groove sections;

[0035] A second embedded steel plate is fixedly installed on the top of the second foundation, and the second track is fixedly connected to the second foundation through the second embedded steel plate;

[0036] The second precast beams are spliced ​​together in sequence to form the track beam for the water inlet section.

[0037] The adjacent second foundations are connected by a tongue and groove joint, allowing the two adjacent second foundations to fit together tightly, forming a strong and continuous connection. This method is more stable than the traditional simple splicing, effectively reducing loosening and displacement between the second precast beams, thereby improving the overall load-bearing capacity and deformation resistance of the track beam structure, and ensuring the safety and stability of the track beam in the water section. The second embedded steel plate facilitates welding of the second track to the second embedded steel plate. The embedded second embedded steel plate also facilitates alignment during the later assembly of the second precast beams, ensuring that the slope ratio of the second track remains constant, thereby reducing alignment errors during later installation.

[0038] Preferably, the second precast beam further includes a C-shaped steel plate and a connecting system. The C-shaped steel plate is embedded in the second foundation, and the connecting system is used to connect the second foundations arranged side by side. The connecting system is connected to the second foundation through the C-shaped steel plate.

[0039] Two parallel track beams are installed in the water section to support the transport trolley. Since the underwater section is subject to lateral loads caused by wind and waves, a connecting system is added between the second foundations installed in parallel underwater. This enhances the lateral stiffness of the track beam structure and effectively prevents the foundations from lateral displacement or swaying caused by wind, waves or fluid impact underwater, ensuring the stability of the track system in the marine environment.

[0040] Preferably, S4 includes the following steps:

[0041] S41. Pre-embedded anchor blocks serve as the foundation for the winch;

[0042] S42. An anchoring steel plate is fixedly installed on the top of the anchor block as the base platform of the winch, and anchoring round steel is welded on the anchoring steel plate;

[0043] S43. Based on the installation location of the winch, construct a winch pad layer on one side of the anchor block, then install the winch on the winch pad layer and ensure that the winch is connected to the anchor round steel.

[0044] By pre-embedding anchor blocks in the foundation to provide stable foundation support for the winch, the tensile and impact forces generated during winch operation can be effectively dispersed. Installing anchoring steel plates on top of the anchor blocks and welding anchoring round steel tightly connects the winch base platform to the anchoring structure, which helps to resist the high-load tensile forces during winch operation. Pre-constructing a pad layer according to the location of the winch can provide a stable and firm installation platform for the winch, making the installation process more convenient.

[0045] Preferably, the slope ratio of the track beam in the water section is greater than the slope ratio of the track beam in the adjacent land slope section.

[0046] Setting the slope ratio of the track beam in the water inlet section to be greater than that of the track beam in the adjacent land slope section, that is, the slope of the track beam in the water inlet section is steeper than that of the track beam in the nearest land slope section, can reduce the prefabrication difficulty of the second precast beam and save construction costs.

[0047] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0048] 1. The HDPE pipe transport track construction method provided by this invention uses precast beams for both the horizontal section track beam and the water inlet section track beam. These beams can be prefabricated in the factory, reducing on-site construction workload and improving construction efficiency. After use, they can be dismantled and reused, saving construction costs.

[0049] 2. The HDPE pipe transport track construction method provided by this invention addresses the issue that, due to the variable slope ratio of the track beams on the land slope section, using precast beams would be too costly and require higher load-bearing capacity. Cast-in-place track beams offer better overall integrity, structural stability, and load-bearing capacity. Furthermore, the variable slope ratio of the track beams on the land slope section makes positioning difficult. Therefore, a positioning steel plate is pre-fixed at the top of the reinforcing cage. This positioning steel plate acts as a marker, making it easier to control the slope ratio of the track beams during subsequent concrete pouring, ensuring smooth track construction and preventing damage to the HDPE pipes due to uneven track surfaces.

[0050] 3. The HDPE pipe transport track construction method provided by this invention ensures the stability of the track foundation by replacing crushed stone and stone in layers. In particular, a geotextile layer is laid in the water inlet section. This geotextile layer forms an isolation between the crushed stone and stone, preventing the crushed stone from sinking or the stone from floating, effectively enhancing the stability and bearing capacity of the track foundation. This allows it to reliably support large-diameter, heavy HDPE pipes and transport trolleys, preventing the track from settling or deforming under load. Attached image description:

[0051] Figure 1 This is a diagram showing the location relationship between the temporary dock and the temporary cofferdam.

[0052] Figure 2 Schematic diagram of the HDPE pipe shipping track;

[0053] Figure 3 This is a schematic diagram of the cross-section of the first precast beam;

[0054] Figure 4 This is a basic assembly diagram;

[0055] Figure 5 This is a schematic diagram of the cross-section of the track beam on the land slope section;

[0056] Figure 6 This is a schematic diagram of the cross-section of the second precast beam;

[0057] Figure 7 This is a schematic diagram of the second basic assembly;

[0058] Figure 8 A schematic diagram showing the connection of two parallel second foundations in the connecting system;

[0059] Figure 9 Section 1 is the connection between the connecting system and the C-shaped steel plate;

[0060] Figure 10 Section two is the connection between the connecting system and the C-shaped steel plate;

[0061] Figure 11 This is a schematic diagram of the anchor block cross-section;

[0062] Figure 12 A schematic diagram of the laying of the winch bedding layer.

[0063] Marked in the image:

[0064] 1-Horizontal section track beam, 11-First precast beam, 111-First foundation, 1111-First tongue and groove joint, 1112-Second tongue and groove joint, 112-First track, 113-First steel plate, 114-First force transmission reinforcement, 115-First embedded steel plate, 2-Land slope section track beam, 21-Reinforcing cage, 22-Positioning steel plate, 23-Slope section track, 3-Water entry section track beam, 31-Second precast beam, 311-Second foundation, 3111- Third tongue and groove, 3112-Fourth tongue and groove, 312-Second track, 313-Second steel plate, 314-Second force transmission steel bar, 315-Second embedded steel plate, 316-C-shaped steel plate, 317-Connecting system, 4-Wind, 5-Anchor block, 51-Anchoring steel plate, 52-Anchoring round steel, 53-I-beam, 6-Wind cushion layer, 101-Temporary wharf, 102-Temporary cofferdam, 201-Stone, 202-Crushed stone, 203-Geotextile layer. Detailed Implementation

[0065] The present invention will now be described in further detail with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0066] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of the present invention is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the present invention or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a particular device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on the present invention.

[0067] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but that it can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0068] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing between identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0069] Furthermore, in the description of the embodiments of the present invention, "several", "more than", and "a number of" represent at least two. The number can be any number, such as 2, 3, 4, 5, 6, 7, 8, or 9, and can even exceed nine.

[0070] Furthermore, in the description of the technical solution of this invention, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0071] Example 1

[0072] This embodiment provides a method for constructing HDPE pipeline transport tracks, used for constructing HDPE pipeline transport tracks at the seaside, including the following steps:

[0073] S1. Level the site, fill temporary wharves 101 on both sides of the track beam 3 in the water inlet section, and fill temporary cofferdam 102 between the two temporary wharves 101.

[0074] Specifically, such as Figure 1 As shown, S1 includes the following steps:

[0075] The land section of the track beam can be leveled according to the elevation of the horizontal section track beam 1 and the land slope section track beam 2, and the foundation trench of the land section track beam can be excavated.

[0076] Earthwork equipment was used to push and fill temporary wharves 101 on the north and south sides of track beam 3 in the water inlet section, geotextile was laid, and excavators were used to lay facing stones.

[0077] The excavator starts from the filled temporary wharf 101 and fills the temporary cofferdam 102 between the two temporary wharves 101. The top width of the temporary cofferdam 102 can be about 10m. The outer side of the temporary cofferdam 102 is covered with rubble for protection, and the inner side of the temporary cofferdam 102 is covered with geotextile for slope protection. The temporary cofferdam 102 temporarily encloses the sea side of the track beam 3 in the water entry section.

[0078] Water pumps were arranged inside the temporary cofferdam 102 to carry out dewatering. After the water level dropped, excavators could be arranged to excavate the foundation trench and repair the slope of the track beam 3 in the water entry section.

[0079] By setting up temporary wharves 101 on both sides of the track beam 3 in the water-entry section, a safe and stable support was provided for the construction of the track in the water-entry section, and the direct impact of waves or tides on the construction area was reduced. The temporary cofferdam 102, constructed between the two temporary wharves 101, effectively prevented seawater intrusion, reduced the impact of waves on the construction site, and provided more stable construction conditions in the water. Dewatering operations were carried out within the cofferdam to ensure a lower water level, which facilitated trench excavation in a dry environment. This method of controlling the water level reduced construction difficulty and improved visibility and safety for workers. After the track was completed, excavators could be deployed to remove the temporary cofferdam 102 and recover the rubble. The temporary wharves 101 could be used as a berthing site for subsequent construction vessels and as a transport site for other structural construction, saving operating costs and reducing demolition costs.

[0080] S2. Track Beam Foundation Construction: Excavators can be used to excavate the track beam foundation. Care must be taken to control the cross-sectional width during excavation to avoid requiring excessive aggregate for backfilling. After excavation, the track beam foundation should be watered and compacted using a small roller, followed by a compaction test. The compaction degree should be 85%-90% to ensure it meets design requirements, helping to maintain the uniformity and density of the foundation and reducing the risk of uneven settlement in the future.

[0081] After the track beam foundation is compacted, it is replaced with crushed stone, such as... Figure 2 As shown, the foundation of the land section track beam (horizontal section track beam 1 + land slope section track beam 2) is replaced with 1-1.5m thick stone material 201, specifically using stone material with a specification of 60-300KG; the foundation of the water section track beam 3 is replaced in two layers. First, a 0.5-0.75m thick layer of crushed stone 202 can be filled in, specifically using crushed stone with a specification of 1-8 inches; then a geotextile layer 203 is laid on the filled crushed stone 202, and then a 0.5-0.75m thick layer of stone material 201 is filled in.

[0082] S31. For example Figure 2 , Figure 3 , Figure 4 As shown, the horizontal section track beam 1 is installed: the horizontal section track beam 1 is spliced ​​together from the first precast beam 11;

[0083] Specifically, S31 includes the following steps:

[0084] The first precast beam 11 includes a first foundation 111 and a first track 112 fixedly connected to the top of the first foundation 111. One end of the first foundation 111 is set as a first tongue and groove joint 1111, and the other end of the first foundation 111 is set as a second tongue and groove joint 1112. Both the first tongue and groove joint 1111 and the second tongue and groove joint 1112 are provided with a first steel plate 113.

[0085] The two adjacent sections of the first foundation 111 are connected by a tongue and groove joint, and the first steel plate 113 of the adjacent first tongue and groove joint 1111 and second tongue and groove joint 1112 is welded with the first force transmission steel bar 114; Figure 4 For example, Figure 4 The first force transmission steel bar 114 is welded at the tongue and groove joint of the two first foundations 111.

[0086] Furthermore, a first embedded steel plate 115 is fixedly installed on the top of the first foundation 111, and the first track 112 is fixedly connected to the first foundation 111 through the first embedded steel plate 115.

[0087] by Figure 4 For example, Figure 4For the same first base 111, its left side is the first tongue-and-groove 1111, which is aligned with the top of the first base 111; for the same first base 111, its right side is the second tongue-and-groove 1112, which is aligned with the bottom of the first base 111. When Figure 4 When the two first foundations 111 on the left and right are connected, the second tongue and groove joint 1112 of the first foundation 111 on the left is connected to the first tongue and groove joint 1111 of the first foundation 111 on the right. The first precast beams 11 are spliced ​​together in sequence to form the horizontal section track beam 1.

[0088] The adjacent first foundations 111 are connected by a tongue and groove joint, allowing two adjacent first foundations 111 to fit together tightly, forming a strong and continuous connection. This method is more stable than the traditional simple splicing, effectively reducing loosening and displacement between the first precast beams 11, thereby improving the overall load-bearing capacity and deformation resistance of the track beam structure, and ensuring the safety and stability of the horizontal section track beam 1. The first embedded steel plate 115 facilitates welding of the first track 112 to the first embedded steel plate 115; the embedded first embedded steel plate 115 also facilitates alignment during the later assembly of the first precast beams 11, ensuring the accurate installation position of the first track 112, thereby reducing alignment errors during later installation.

[0089] S32. Casting of Track Beam 2 on the Land Slope Section: Track beam 2 on the land slope section adopts a variable slope ratio design, for example... Figure 2 As shown, the slope ratio can be gradually varied from 1:100 to 1:15.5. Figure 5 As shown, the cross-section of the track beam 2 on the land slope section is similar to that of the first precast beam 11. First, a reinforcing cage 21 can be tied in the foundation trench. After the reinforcing cage 21 is tied, a positioning steel plate 22 is fixed to the top of the reinforcing cage 21. The track 23 of the slope section is then welded onto the positioning steel plate 22. The elevation of the track 23 of the slope section is adjusted with reference to the elevation of the positioning steel plate 22. After installing the track beam formwork, concrete is poured.

[0090] S33. For example Figure 2 , Figure 6 , Figure 7 As shown, the installation of the water inlet section track beam 3 is carried out: the water inlet section track beam 3 adopts a fixed slope ratio setting. Specifically, the slope ratio of the water inlet section track beam 3 is greater than the slope ratio of the adjacent land slope section track beam 2, so as to... Figure 2 For example, the slope ratio of the track beam 3 in the water entry section can be 1:14.5, and the slope ratio of the track beam 2 on the land slope section adjacent to the track beam 3 in the water entry section is 1:15.5; the track beam 3 in the water entry section is spliced ​​from the second precast beam 31.

[0091] Specifically, S33 includes the following steps:

[0092] The second precast beam 31 includes a second foundation 311 and a second track 312 fixedly connected to the top of the second foundation 311. One end of the second foundation 311 is configured as a third tongue and groove joint 3111, and the other end of the second foundation 311 is configured as a fourth tongue and groove joint 3112. Both the third tongue and groove joint 3111 and the fourth tongue and groove joint 3112 are provided with a second steel plate 313.

[0093] The two adjacent sections of the second foundation 311 are connected by tongue and groove, and the second steel plate 313 of the adjacent third tongue and groove 3111 and fourth tongue and groove 3112 is welded with the second force transmission steel bar 314.

[0094] The second foundation 311 is fixedly installed on the top of the second foundation 311, and the second track 312 is fixedly connected to the second foundation 311 through the second embedded steel plate 315.

[0095] The second precast beam 31 is spliced ​​together in sequence to form the track beam 3 of the water inlet section.

[0096] The adjacent second foundations 311 are connected by a tongue and groove joint, allowing the two adjacent second foundations 311 to fit together tightly, forming a strong and continuous connection. This method is more stable than the traditional simple splicing, effectively reducing loosening and displacement between the second precast beams 31, thereby improving the overall load-bearing capacity and deformation resistance of the track beam structure, and ensuring the safety and stability of the track beam 3 in the water entry section. The second embedded steel plate 315 facilitates welding of the second track 312 to the second embedded steel plate 315. The embedded second embedded steel plate 315 plays a role in facilitating alignment during the later assembly of the second precast beams 31, ensuring that the slope ratio of the second track 312 remains constant, thereby reducing alignment errors during later installation.

[0097] Furthermore, in order to improve the underwater stability of the track beam 3 in the water-entry section, such as... Figure 8 , Figure 9 , Figure 10 As shown, it can be understood that the HDPE pipe transport track construction method provided in this embodiment constructs a track for the transport trolley to run on, with the transport tracks arranged side by side (the wheels of the transport trolley run smoothly within the first track 112, the ramp section track 23, and the second track 312 arranged side by side). Therefore, the second precast beam 31 also includes a C-shaped steel plate 316 and a connecting system 317. The second foundation 311 pre-embeds the C-shaped steel plate 316, and the connecting system 317 is used to connect the second foundation 311 arranged side by side. The connecting system 317 is connected to the second foundation 311 through the C-shaped steel plate 316, as shown. Figure 10 As shown, connection system 317 can use double I-beam connecting beams.

[0098] Two parallel track beams 3 are set up in the water section to support the transport trolley. Since the lateral load caused by wind and waves is more common underwater, a connecting system 317 is added between the second foundations 311 set up in parallel underwater. This enhances the lateral stiffness of the track beam structure and effectively prevents the foundation from lateral displacement or swaying caused by wind, waves or fluid impact underwater, ensuring the stability of the track system in the marine environment.

[0099] S4. Install winch 4. In this embodiment, a 15T winch can be used. Winch 4 can be installed on the crossbeam connected to the outgoing track beam to ensure the stability of winch 4. Specifically, three sets of winches 4 can be symmetrically installed on both sides of each outgoing track.

[0100] Furthermore, such as Figure 11 , Figure 12 As shown, S4 includes the following steps:

[0101] S41. The pre-embedded anchor block 5 serves as the foundation for the winch 4. In this embodiment, the anchor block 5 measures 3m in length, 1.9m in width, and 1.7m in height. Based on the measured location, an excavator is used to excavate on the existing soil surface, forming a small foundation pit measuring 3.8m in length, 3m in width, and 1.7m in height. After excavation, a small road roller is used to water and compact the bottom, and as follows... Figure 12 Two anchor blocks 5 are placed vertically as shown. After the anchor blocks 5 are embedded, the gaps around the foundation pit are backfilled, and water is sprayed and compacted at the corresponding locations.

[0102] S42. Anchor steel plate 51 is fixedly installed on the top of anchor block 5 as the base platform of winch 4. In this embodiment, the thickness of anchor steel plate 51 is 2CM. The same size position can be cut at the lifting point position of anchor block 5 using gas welding. 20# I-beam 53 is vertically inserted into the cut lifting point position and concrete grouting is performed. After the concrete has solidified, the embedded I-beam 53 and anchor steel plate 51 are fully welded together to fasten the anchor steel plate 51 to the embedded anchor block 5.

[0103] Then, anchoring round steel 52 is welded onto anchoring steel plate 51. In this embodiment, the diameter of anchoring round steel 52 is 100mm. After the anchoring round steel 52 is welded, diagonal bracing can also be welded around it.

[0104] S43. After the anchor block 5 is constructed, according to the installation position of the winch 4, construct the winch pad 6 on one side of the anchor block 5. For example, an excavation with a depth of 10cm and a size of 2m*3m can be carried out in front of the anchor block 5. After compacting the soil foundation, a C20 concrete pad with a thickness of 10cm is laid. Then, the winch 4 is installed on the winch pad 6 and the winch 4 is connected to the anchor round steel 52.

[0105] By pre-embedding anchor blocks 5 in the foundation to provide stable foundation support for the winch 4, the tensile and impact forces generated during the operation of the winch 4 can be effectively dispersed. Anchoring steel plates 51 are installed on the top of the anchor blocks 5 and anchoring round steel 52 is welded to tightly connect the base platform of the winch 4 with the anchoring structure, which helps to resist the high load tensile force during the operation of the winch 4. The pre-construction of the pad layer according to the location of the winch 4 can provide a stable and firm installation platform for the winch 4, making the installation process more convenient.

[0106] The HDPE pipeline transport track construction method provided in this embodiment uses precast beams for both the horizontal section track beam 1 and the water inlet section track beam 3. These beams can be prefabricated in the factory, reducing on-site construction workload and improving construction efficiency. After use, they can be dismantled and reused, saving construction costs.

[0107] Because the track beam 2 on the land slope section adopts a variable slope ratio, using precast beams would be too costly and would require a high load-bearing capacity. Cast-in-place track beams offer better overall integrity, structural stability, and load-bearing capacity. Due to the variable slope ratio, positioning the track beam 2 on the land slope section is difficult. Therefore, a positioning steel plate 22 is pre-fixed to the top of the reinforcing cage 21. The positioning steel plate 22 acts as a marker, making it easier to control the slope ratio of the track beam 2 on the land slope section during later concrete pouring. This ensures smooth construction of the track 23 on the slope and prevents damage to the HDPE pipes due to uneven track surfaces.

[0108] Because the foundation of track beam 3 in the water-entry section is more susceptible to the influence of seawater, its foundation stability is worse. This method ensures the stability of the track foundation by replacing the crushed stone 202 and stone 201 in layers. In particular, a geotextile layer 203 is laid in the water-entry section. This geotextile layer forms an isolation between the crushed stone 202 and stone 201, preventing the crushed stone 202 from sinking or the stone 201 from floating. This effectively enhances the stability and bearing capacity of the track foundation, enabling it to reliably support the weight of large-diameter, heavy HDPE pipes, ballast blocks, and transport trolleys, preventing track settlement or deformation under heavy load conditions.

[0109] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements 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 of constructing a HDPE pipe haul track, characterized in that, Includes the following steps: S1. Level the site, fill temporary wharves (101) on both sides of the track beam (3) in the water inlet section, and fill temporary cofferdam (102) between the two temporary wharves (101). S2. Track beam foundation construction: Excavate the track beam foundation, compact it, and then replace the track beam foundation with crushed stone. The track beam foundation on land is replaced with 1-1.5m thick stone (201). The track beam (3) foundation in the water section is replaced in two layers. First, 0.5-0.75m thick crushed stone (202) is filled in. Then, a geotextile layer (203) is laid on the filled crushed stone (202), and then 0.5-0.75m thick stone (201) is filled in. S31. Installation of horizontal section track beam (1): The horizontal section track beam (1) is spliced ​​from the first precast beam (11); S32. Construction of the track beam (2) on the land slope section: The track beam (2) on the land slope section adopts a variable slope ratio setting. First, the steel cage (21) is tied in the foundation trench. After the steel cage (21) is tied, the positioning steel plate (22) is fixed on the top of the steel cage (21) in advance. The positioning steel plate (22) serves as a target. The track (23) on the slope section is welded on the positioning steel plate (22). The elevation of the track (23) on the slope section is adjusted with reference to the elevation of the positioning steel plate (22) in order to control the slope ratio of the track beam (2) on the land slope section and ensure that the construction of the track (23) on the slope section is smooth. After the track beam template is installed, the concrete is poured. S33. Installation of the track beam (3) in the water inlet section: The track beam (3) in the water inlet section adopts a fixed slope ratio and is spliced ​​from the second precast beam (31); S33 includes the following steps: The second precast beam (31) includes a second foundation (311) and a second track (312) fixedly connected to the top of the second foundation (311). One end of the second foundation (311) is configured as a third tongue and groove (3111), and the other end of the second foundation (311) is configured as a fourth tongue and groove (3112). Both the third tongue and groove (3111) and the fourth tongue and groove (3112) are provided with a second steel plate (313). The two adjacent sections of the second foundation (311) are connected by tongue and groove, and the second steel plate (313) of the adjacent third tongue and groove (3111) and the fourth tongue and groove (3112) are welded with the second force transmission steel bar (314). A second embedded steel plate (315) is fixedly installed on the top of the second foundation (311), and the second track (312) is fixedly connected to the second foundation (311) through the second embedded steel plate (315); The second precast beam (31) is spliced ​​together in sequence to form the track beam (3) of the water inlet section; The track beams (3) of the water inlet section are arranged side by side. The second precast beam (31) also includes a C-shaped steel plate (316) and a connecting system (317), and the second foundation (311) pre-embeds the C-shaped steel plate (316). The connection system (317) uses double I-beam connecting beams to connect the second foundations (311) arranged side by side. The connecting system (317) is connected to the second foundation (311) via the C-shaped steel plate (316); S4. Install the winch (4), including the following steps: S41. Anchor blocks (5) are pre-embedded as the foundation of the winch (4); S42. Cut the anchor block (5) at the lifting point position, insert the I-beam (53) vertically into the cut lifting point position, and grout concrete; after the concrete has solidified, fix the anchoring steel plate (51) on the top of the anchor block (5) as the base platform of the winch (4), and fully weld the pre-embedded I-beam (53) and the anchoring steel plate (51); weld the anchoring round steel (52) on the anchoring steel plate (51); S43. Based on the installation position of the winch (4), construct the winch pad (6) on one side of the anchor block (5), then install the winch (4) on the winch pad (6) and ensure that the winch (4) is connected to the anchor round steel (52).

2. A method of constructing a HDPE pipe delivery track according to claim 1, characterized in that, S1 includes the following steps: The land section track beams were leveled according to the elevations of the horizontal section track beams (1) and the land slope section track beams (2), and the foundation trenches for the land section track beams were excavated. Temporary wharves (101) were built on both sides of the track beam (3) in the water inlet section, geotextile was laid and facing stones were laid; Starting from the filled temporary wharf (101), a temporary cofferdam (102) is filled between the two temporary wharves (101). Stone blocks are laid on the outside of the temporary cofferdam (102) for protection, and geotextile is laid on the inside of the temporary cofferdam (102) for slope protection. The temporary cofferdam (102) temporarily encloses the sea side of the track beam (3) in the water entry section. Dewatering was carried out within the temporary cofferdam (102), and after the water level dropped, the foundation trench for the track beam (3) of the water inlet section was excavated.

3. A method of constructing a HDPE pipe shipping track according to claim 1, characterized in that, After excavating the track beam foundation in S2, the track beam foundation is compacted and a compaction test is conducted. The compaction degree of the track beam foundation is 85%-90%.

4. A method of constructing a HDPE pipe shipping track according to claim 1, characterized in that, S2 stone (201) has a size of 60-300KG stone; crushed stone (202) has a size of 1-8 inches crushed stone.

5. A method of constructing a HDPE pipe shipping track as claimed in claim 1, wherein, S31 includes the following steps: The first precast beam (11) includes a first foundation (111) and a first track (112) fixedly connected to the top of the first foundation (111). One end of the first foundation (111) is configured as a first tongue and groove (1111), and the other end of the first foundation (111) is configured as a second tongue and groove (1112). Both the first tongue and groove (1111) and the second tongue and groove (1112) are provided with a first steel plate (113). The first foundation (111) of two adjacent sections is connected by tongue and groove, and the first steel plate (113) of the adjacent first tongue and groove (1111) and second tongue and groove (1112) is welded with the first force transmission steel bar (114). The first precast beam (11) is spliced ​​together in sequence to form a horizontal section track beam (1).

6. A method of constructing a HDPE pipe shipping track according to claim 5, characterized in that, A first embedded steel plate (115) is fixedly installed on the top of the first foundation (111), and the first track (112) is fixedly connected to the first foundation (111) through the first embedded steel plate (115).

7. A method of constructing a HDPE pipe shipping track in accordance with claim 1, characterized in that, The slope ratio of the water entry section track beam (3) is greater than the slope ratio of the immediately adjacent land slope section track beam (2).

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