Modular river crossing pipeline foundation and method of assembly thereof

Abstract

This invention discloses a modular river-crossing pipeline foundation and its assembly method, relating to the field of pipeline engineering technology. It enhances the support and fixation of the river-crossing pipeline, enabling the rapid modular construction of the pipeline in riverbeds or soft soil areas. The modular river-crossing pipeline foundation includes: precast node piles, a load-bearing precast slab, a precast pile extension section, a pipeline connection end, and a mechanical sleeve. The precast node piles are columnar with a central annular platform. The load-bearing precast slab is a plate-shaped body with a through hole at its center, the through hole matching the transverse cross-section of the precast node pile. The lower end of the precast node pile passes through the through hole of the load-bearing precast slab, which is located below the annular platform. The precast pile extension section is columnar, with its lower end connected to the upper end of the precast node pile via a mechanical sleeve. The pipeline connection end is connected to the upper end of the precast pile extension section.

Description

Technical Field

[0001] This invention relates to the field of pipeline engineering technology, and in particular to a modular river-crossing pipeline foundation and its assembly method. Background Technology

[0002] River-crossing pipelines are transportation systems that cross rivers or other bodies of water to transport liquids (such as water and oil), gases (such as natural gas), or other media. They are widely used in municipal water supply and sewage and rainwater pipe networks, as well as in the petrochemical and natural gas industries.

[0003] There are generally four methods for constructing existing river-crossing pipelines: First, burying the pipeline below the riverbed to reduce the impact of water erosion, and using concrete blocks or riprap on the upper part to prevent the pipeline from floating; second, using horizontal directional drilling technology to lay the pipeline without excavation below the riverbed, which can effectively avoid damage to the riverbed ecosystem; third, erecting the pipeline above the river using a steel truss structure or suspension structure on the riverbank; and fourth, utilizing existing buildings and structures along the river, fixing the pipeline to the side of the existing buildings and structures using fixed supports.

[0004] However, the above four methods have many disadvantages and limitations. The first method, open-cut direct burial, requires measures such as intercepting dams and water-stopping supports, which damages the riverbank greening environment, affects the normal flow of the river, and seriously disturbs the river's aquatic environment. Moreover, the excavation is difficult, the river operation has a high risk factor, the river closure period is long, and the cost is high and efficiency is low. The second method, horizontal directional drilling, has strict requirements on the elevation of the pipeline crossing the river: because a layer of anti-buoyancy soil needs to be retained above the pipeline, the pipeline elevation should be about 1 meter below the riverbed elevation, reducing the burial depth and increasing the overall cost of pipeline construction. At the same time, horizontal directional drilling also requires high geological conditions: geological exploration and comprehensive geophysical exploration along the pipeline route are required, the construction space needs to extend to the riverbank, there needs to be ample space for directional drilling machinery on the ground, and clear pipeline network conditions are required underground. The third method, truss erection, requires foundations to be set up on the bank or in the water. The steel truss hoisting equipment is relatively heavy, increasing the construction difficulty. The fourth method of utilizing existing buildings and structures requires the approval of the ownership unit, and some of these existing buildings and structures are old and have poor structural stability, making it impossible to effectively fix the pipes. Summary of the Invention

[0005] This invention provides a modular river-crossing pipeline foundation and its assembly method, which eliminates the need for intercepting dams and water-stopping supports, thus not affecting the normal flow of water in the river and protecting the river's water environment. It does not have strict requirements on the river elevation and has a wide range of applications. The split-type clamps are installed on the river-crossing pipeline, reducing the difficulty of construction. It enhances the support and fixation of the river-crossing pipeline and enables the rapid modular construction method to erect the river-crossing pipeline in the river or soft soil area.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] The first aspect of the present invention provides a modular river-crossing pipeline foundation, comprising: node precast piles, load-bearing precast slabs, precast pile extension sections, pipeline connection ends, and mechanical sleeves;

[0008] The precast piles at the nodes are columnar with a ring-shaped platform in the middle.

[0009] The load-bearing precast slab is a plate-shaped body with a through hole at the center. The through hole matches the transverse section of the node precast pile. The lower end of the node precast pile passes through the through hole of the load-bearing precast slab. The load-bearing precast slab is located below the annular platform.

[0010] The precast pile extension section is columnar, and its lower end is connected to the upper end of the node precast pile through a mechanical sleeve;

[0011] The pipe connection end is connected to the upper end of the precast pile extension section.

[0012] Furthermore, the modular river-crossing pipeline foundation includes:

[0013] The precast pile at the node is cylindrical, and correspondingly, the central through hole of the load-bearing precast slab is a circular through hole.

[0014] Furthermore, the modular river-crossing pipeline foundation includes:

[0015] The pipe connection end includes a transition joint and a split clamp. The transition joint is connected to the upper end of the precast pile extension section. The split clamp is composed of two semi-circular ring components spliced ​​together, and has ear plates with bolt holes symmetrically provided on both sides.

[0016] Furthermore, the modular river-crossing pipeline foundation includes:

[0017] The split-type clamp is composed of two semi-circular ring components joined together by bolts or clip fasteners.

[0018] Furthermore, the modular river-crossing pipeline foundation includes:

[0019] The inner side of the split-type clamp is covered with a rubber or polyurethane cushioning layer.

[0020] A second aspect of the present invention provides a method for assembling a modular river-crossing pipeline foundation, comprising:

[0021] Determine the locations for the foundations of multiple modular river-crossing pipelines;

[0022] Based on the riverbed elevation and the thickness of the soft soil layer, select the corresponding height of the node precast pile;

[0023] The precast load-bearing slabs in the modular river-crossing pipeline foundation are sequentially hoisted to their corresponding locations, so that each precast load-bearing slab sinks to the riverbed.

[0024] The node precast pile is inserted into the through hole corresponding to the load-bearing precast slab along the downward end direction, and pressure is applied to the upper end of the node precast pile so that its lower end is inserted into the soft soil layer.

[0025] Determine the precast pile extension section, and connect the lower end of each precast pile extension section to the upper end of the corresponding node precast pile using a mechanical sleeve;

[0026] Once the elevation of the upper end of the precast pile extension section reaches the preset height, multiple pipe connection ends are fixed to the upper end of the corresponding precast pile extension section.

[0027] Furthermore, the assembly method for the modular river-crossing pipeline foundation, which determines the layout locations of multiple modular river-crossing pipeline foundations, includes:

[0028] Using a line-laying tool, a line is laid out above the river channel of the river-crossing pipeline to determine the number of modular river-crossing pipeline foundations to be laid out and to mark the laying locations.

[0029] Furthermore, the assembly method for the modular river-crossing pipeline foundation, including the determination of the precast pile extension section, comprises:

[0030] The precast pile extension section is determined based on the elevation of the upper end of the precast pile at the node and the matching elevation of the river-crossing pipeline.

[0031] This invention provides a modular river-crossing pipeline foundation and its assembly method. It eliminates the need for intercepting dams and water-stopping supports, thus not affecting the normal flow of water in the river and protecting the river's aquatic environment. It has no strict requirements on river elevation, making it widely applicable. The use of split-type clamps for installation on the river-crossing pipeline reduces construction difficulty. It enhances the support and fixation of the pipeline, enabling rapid modular construction to erect the pipeline in riverbeds or areas with weak soil. The construction components are lightweight, simplifying mechanical construction and accelerating foundation construction. This saves on the costs of cast-in-place concrete formwork support and curing, reduces construction waste, and lowers labor costs and project costs. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. The drawings are only used to illustrate the implementation methods and are not intended to limit the present invention.

[0033] Figure 1 This is a schematic diagram of the basic structure of a modular river-crossing pipeline in an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of a node precast pile structure in an embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of a precast slab structure subjected to stress in an embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram of a precast pile extension structure in an embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of a pipe connection end structure according to an embodiment of the present invention;

[0038] Figure 6 This is a schematic diagram of a modular river-crossing pipeline foundation assembly method in an embodiment of the present invention.

[0039] In the figure, 1. Precast pile node, 11. Ring platform, 2. Load-bearing precast slab, 3. Precast pile extension section, 4. Pipe connection end, 41. Transition joint, 42. Split clamp, 421. Ear plate, 5. Mechanical sleeve. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0041] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art; the terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the terms “comprising” and “having” and any variations thereof in the specification, claims and foregoing drawings, but is intended to cover non-exclusive inclusion.

[0042] In the description of the embodiments of this invention, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this invention, "multiple" means two or more, unless otherwise explicitly defined.

[0043] In the description of the embodiments of this invention, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0044] In the description of the embodiments of the present invention, the term "multiple" refers to two or more (including two), similarly, "multiple groups" refers to two or more (including two groups), and "multiple pieces" refers to two or more (including two pieces).

[0045] In the description of the embodiments of the present invention, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and are not intended to 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 the embodiments of the present invention.

[0046] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present invention can be understood according to the specific circumstances.

[0047] Example 1

[0048] This invention provides a modular river-crossing pipeline foundation, such as... Figure 1 As shown, it includes: node precast pile 1, load-bearing precast slab 2, precast pile extension section 3, pipe connection end 4, and mechanical sleeve 5.

[0049] In this embodiment of the invention, the node precast pile 1, the load-bearing precast slab 2, and the precast pile extension section 3 are all precast components, that is, they are not poured or processed on the construction site, but are produced in the factory in advance and transported to the site for direct assembly.

[0050] The precast pile 1 at the node is columnar, with a ring platform 11 in the middle.

[0051] like Figure 2As shown, the precast pile 1 at the node is columnar, with its height significantly greater than its diameter. The upper end of the precast pile 1 has an external thread that matches the internal thread of the mechanical sleeve 5, allowing for connection between the precast pile 1 and the mechanical sleeve 5. A ring-shaped platform 11 is integrally formed with the precast pile 1 in the middle. The precast pile 1 serves as the lower vertical load-bearing structure for the entire modular river-crossing pipeline foundation, effectively improving overturning resistance when inserted into soft soil layers.

[0052] It should be noted that the height and diameter of the precast pile 1 and the diameter of the ring platform 11 are determined by the riverbed elevation and the thickness of the soft soil layer, and can also be precast according to actual needs.

[0053] The precast slab 2 is a plate-shaped body with a through hole at the center. The through hole matches the transverse section of the node precast pile 1. The lower end of the node precast pile 1 passes through the through hole of the precast slab 2. The precast slab 2 is located below the annular platform 11.

[0054] like Figure 3 As shown, the precast load-bearing slab 2 is a plate-shaped body with a through hole at its center. It serves as the bottom load-bearing and load-amplifying component of the modular river-crossing pipeline foundation, increasing the contact area with the ground and evenly distributing the upper load to the soft soil layer at the riverbed. The through hole at the center of the precast load-bearing slab 2 matches the transverse section of the node precast pile 1, allowing the precast load-bearing slab 2 to be smoothly fitted onto the node precast pile 1. After the lower end of the node precast pile 1 passes through the through hole of the precast load-bearing slab 2, the precast load-bearing slab 2 is supported below the annular platform 11, which bears its vertical load, achieving positioning and load-bearing to control the settlement of the river-crossing pipeline.

[0055] The precast pile extension section 3 is columnar, and its lower end is connected to the upper end of the node precast pile 1 through a mechanical sleeve 5.

[0056] like Figure 4 As shown, the precast pile extension section 3 is columnar and is used to extend the vertical support height to adapt to different river topography and pipeline laying elevations. Both the upper and lower ends of the precast pile extension section 3 are provided with external threads. Its lower end is connected to the upper end of the node precast pile 1 via a mechanical sleeve 5, forming a detachable and adjustable vertical extension structure. This allows for adjustment of the upper elevation of the modular river-crossing pipeline foundation according to the relationship between the riverbed elevation and the pipeline elevation.

[0057] The pipe connection end 4 is connected to the upper end of the precast pile extension section 3.

[0058] like Figure 5As shown, the pipe connection end 4 includes a transition joint 41 and a split clamp 42. The transition joint 41 is cylindrical with an internal thread on its inner wall. This internal thread matches the external thread at the upper end of the precast pile extension section 3, so that the pipe connection end 4 can be connected to the upper end of the precast pile extension section 3. The split clamp 42 is composed of two semi-circular ring components spliced ​​together, forming an open ring structure. It has symmetrical ear plates 421 with bolt holes on both sides. The split clamp 42 can be opened, closed, and clamped by fasteners (such as bolts). The inner diameter of the split clamp 42 matches the outer diameter of the river-crossing pipe, so that it can tightly wrap around the outer wall of the river-crossing pipe.

[0059] This invention provides a modular foundation for a river-crossing pipeline. It eliminates the need for intercepting dams and water-stopping supports, thus not affecting the normal flow of water and protecting the river's aquatic environment. It has no strict requirements on river elevation, making it widely applicable. The use of split-type clamps on the pipeline reduces construction difficulty. It enhances the support and fixation of the pipeline, enabling rapid modular construction to erect the pipeline in riverbeds or areas with weak soil. The construction components are lightweight, simplifying mechanical construction and accelerating foundation construction. This saves on the costs of cast-in-place concrete formwork support and curing, reduces construction waste, and lowers labor costs and overall project cost.

[0060] Example 2

[0061] This invention provides a modular river-crossing pipeline foundation, such as... Figure 1 As shown, it includes: node precast pile 1, load-bearing precast slab 2, precast pile extension section 3, pipe connection end 4, and mechanical sleeve 5.

[0062] The precast pile 1 at the node is cylindrical, with a ring platform 11 in the middle.

[0063] Among them, the precast pile 1 of the node is cylindrical, which allows the precast pile 1 of the node to be subjected to more uniform force when bearing vertical and horizontal loads. It can transmit the load more stably in the soft soil layer of the riverbed and avoid damage caused by local stress concentration in the pile body of the precast pile 1 of the node.

[0064] The upper end of the precast pile 1 is provided with an external thread, which is used to match the internal thread of the mechanical sleeve 5 to achieve the connection with the precast pile extension section 3. The threaded connection method facilitates quick assembly, disassembly and adjustment on site, and ensures the firmness of the connection part, so as to ensure that the load can be stably transmitted.

[0065] The precast pile 1 at the node has a ring platform 11 in the middle. The core function of the ring platform 11 is to support the precast slab 2 and transfer the load borne by the precast slab 2 to the precast pile 1. At the same time, it can limit the vertical position of the precast slab 2 and prevent vertical displacement of the precast slab 2 during use, thus ensuring the stability of the modular river crossing pipeline foundation structure.

[0066] The central axis of the annular platform 11 coincides with the central axis of the precast pile 1. This design ensures uniform stress distribution and avoids problems such as tilting of the precast pile 1 or uneven settlement of the modular river-crossing pipeline foundation caused by eccentric loads. The diameter of the annular platform 11 is larger than that of the precast pile 1 to meet the requirements of bearing the load-bearing precast slab 2. Its diameter is determined by the size of the circular through hole of the precast slab 2 and the size of the load to be borne. The height of the annular platform 11 needs to be adapted to the thickness of the precast slab 2, and combined with the overall structural strength design of the precast pile 1, to ensure that no structural damage occurs when bearing loads.

[0067] Preferably, the material of the precast pile 1 at the node is concrete or steel, depending on the actual needs: when the load of the pipeline crossing the river is small and the geological conditions of the riverbed are relatively good, concrete, which has a lower cost, can be selected; when the pipeline load is large, the thickness of the soft soil layer at the riverbed is large, and the requirements for the strength and deformation resistance of the precast pile 1 at the node are higher, steel can be selected.

[0068] The diameter and height of the precast pile 1 at the node are determined by the riverbed elevation and the thickness of the soft soil layer: the riverbed elevation determines the depth to which the precast pile 1 at the node needs to be driven into the riverbed to ensure the stability of the modular river-crossing pipeline foundation; the greater the thickness of the soft soil layer, the higher the height of the precast pile 1 at the node needs to be, and the diameter also needs to be increased accordingly, so as to ensure the bearing capacity of the precast pile 1 at the node and avoid the problems of instability and excessive settlement of the precast pile 1 at the node in the soft soil layer.

[0069] Furthermore, the central axis of the precast pile 1 refers to the central axis of symmetry of the cylindrical pile body, which is a straight line running through the top and bottom of the precast pile 1; the central axis of the annular platform 11 refers to the central axis of symmetry of its annular structure, which is a straight line passing through the center of the annular platform 11 and perpendicular to the plane of the annular platform 11. The coincidence of the two central axes means that the annular platform 11 is coaxially set in the middle of the precast pile 1, with the central axis of the precast pile 1 as the reference, and the annular center of the annular platform 11 and the cylindrical center of the precast pile 1 are on the same straight line.

[0070] The precast slab 2 is a plate-shaped body with a through hole at the center. The through hole matches the transverse section of the node precast pile 1. The lower end of the node precast pile 1 passes through the through hole of the precast slab 2. The precast slab 2 is located below the annular platform 11.

[0071] Preferably, the precast load-bearing slab 2 is a cuboid, with the length greater than the height and the width greater than the height. The reason for this design is as follows:

[0072] First, it increases the load distribution area: the flat cuboid can significantly increase the contact area with the soft soil layer at the bottom of the river. Under the same load, the larger the contact area, the smaller the pressure on the soft soil layer at the bottom of the river. This can effectively prevent the soft soil layer at the bottom of the river from being over-compressed due to excessive pressure, thereby preventing the modular river-crossing pipeline foundation from experiencing excessive settlement.

[0073] Secondly, it enhances its own stability: the flat rectangular shape has a lower center of gravity, making it less prone to swaying or displacement when subjected to water flow or other external forces at the bottom of the river, thus ensuring the overall stability of the modular river-crossing pipeline foundation.

[0074] Third, it is suitable for riverbed construction environment: the rectangular shape is more convenient for factory prefabrication and on-site transportation and installation. At the same time, when placed on the riverbed, it is less likely to tip over due to unevenness compared to other shapes such as circles.

[0075] The central through hole of the precast slab 2 is a circular through hole, which matches the transverse section of the precast pile 1. The purpose of this design is to: achieve the fitting installation of the precast slab 2 and the precast pile 1, allowing the precast slab 2 to pass exactly through the precast pile 1, enabling quick positioning of the precast slab 2 during on-site installation without additional adjustment procedures, thus improving construction efficiency; and ensure the rationality of load transfer. The matching of the circular through hole with the transverse section of the precast pile 1 allows the load to be evenly transferred to the annular platform 11 and the precast pile 1, preventing the precast slab 2 from shaking due to an excessively large circular through hole, thereby avoiding the problem of local stress concentration.

[0076] The lower end of the node precast pile 1 passes through the through hole of the load-bearing precast slab 2, which is located below the annular platform 11. This installation provides stable vertical support: the annular platform 11 provides vertical support for the load-bearing precast slab 2, transferring the load on the load-bearing precast slab 2 to the node precast pile 1, ensuring that the load can be stably transferred to the stable soil layer deep in the riverbed; the annular platform 11 can restrict the upward displacement of the load-bearing precast slab 2, preventing vertical displacement of the load-bearing precast slab 2 when impacted by water flow or pushed upward by the river-crossing pipeline, thus ensuring the stability of the modular river-crossing pipeline foundation structure.

[0077] In addition, the central axis of the precast pile 1 coincides with the central axis of the precast slab 2. The core function of this design is to ensure uniform stress and avoid eccentric loads.

[0078] When the axes coincide, the load on the precast slab 2 is evenly distributed along the central axis to the annular platform 11 and the node precast pile 1, preventing the load from being biased to one side. This avoids eccentric pressure on the node precast pile 1 and prevents local stress concentration, tilting, or even fracture of the pile. Simultaneously, the coincident axis design also ensures that the reaction force from the soft soil layer at the riverbed on the precast slab 2 is evenly distributed, preventing tilting and uneven settlement of the modular river-crossing pipeline foundation and guaranteeing the stability of the entire modular river-crossing pipeline foundation.

[0079] The precast pile extension section 3 is columnar, and its lower end is connected to the upper end of the node precast pile 1 through a mechanical sleeve 5.

[0080] The precast pile extension section 3 is columnar because columnar structures provide a more uniform stress distribution when subjected to vertical and horizontal loads (such as river water impact), avoiding localized stress concentration. Simultaneously, its diameter matches that of the node precast pile 1, ensuring consistent overall stress distribution after connection and preventing excessive localized stress due to abrupt diameter changes, thus improving the overall load-bearing stability of the node precast pile 1. The columnar shape, consistent with the shape of the node precast pile 1, ensures that the mechanical sleeve 5 can simultaneously accommodate both components, achieving a stable connection. It also ensures that the central axis of the entire node precast pile 1 coincides after connection, preventing eccentric loads.

[0081] The precast pile extension section 3 is columnar, and its lower end is connected to the upper end of the node precast pile 1 through the mechanical sleeve 5, so as to realize the flexible adjustment of the pile length of the node precast pile 1.

[0082] The pipe connection end 4 is connected to the upper end of the precast pile extension section 3. The pipe connection end 4 includes a transition joint 41 and a split clamp 42. The transition joint 41 is connected to the upper end of the precast pile extension section 3. The split clamp 42 is composed of two semi-circular ring components spliced ​​together, and its two sides are symmetrically provided with ear plates 421 with bolt holes. The split clamp 42 is composed of two semi-circular ring components spliced ​​together by bolts or fasteners. A rubber or polyurethane buffer pad is pasted on the inner side of the split clamp 42.

[0083] Among them, the pipeline connection end 4 is the transition component that realizes the connection between the river-crossing pipeline and the modular river-crossing pipeline foundation. It can stably transfer the load of the river-crossing pipeline to the node precast pile 1, and at the same time play a role in fixing and protecting the river-crossing pipeline, preventing the pipeline from being displaced or damaged when impacted by water flow or when its own load changes, thus ensuring the long-term stable operation of the river-crossing pipeline.

[0084] The inner wall of the transition joint 41 is provided with internal threads. This structure is designed to be compatible with the external threads at the upper end of the precast pile extension section 3, thereby achieving the connection between the two. The engagement connection between the transition joint 41 and the upper thread of the precast pile extension section 3 allows the transition joint 41 to fit tightly against the precast pile extension section 3, enabling it to withstand the vertical and horizontal loads transmitted by the river-crossing pipeline and preventing loosening or displacement at the connection point.

[0085] The split clamp 42 is made up of two semi-circular ring components spliced ​​together by bolts or clip fasteners. The advantage of this design is that it does not require the split clamp 42 to be inserted from one end of the pipe. The two semi-circular ring components can be directly fastened to the designated position of the river crossing pipeline on site, which greatly improves the convenience of installation. It is especially suitable for river crossing pipelines that have been partially laid or installation scenarios with limited space.

[0086] The split-type clamp 42 has symmetrical ear plates 421 with bolt holes on both sides. The two semi-circular components can be fastened together by bolts or clip fasteners to fix the river-crossing pipeline.

[0087] The inner side of the split clamp 42 is covered with a rubber or polyurethane buffer pad, which can buffer the vibration generated by the river crossing pipeline during operation and the displacement stress caused by the water flow impact, and prevent the outer wall of the river crossing pipeline from being damaged by the rigid compression of the split clamp 42; at the same time, the rubber or polyurethane buffer pad has a large frictional force, which can prevent the river crossing pipeline from sliding inside the split clamp 42 and improve the fixed stability of the river crossing pipeline.

[0088] It should be noted that the detailed description of each component structure in this embodiment can be found in other embodiments, and will not be repeated here.

[0089] This invention provides a modular foundation for a river-crossing pipeline. It eliminates the need for intercepting dams and water-stopping supports, thus not affecting the normal flow of water and protecting the river's aquatic environment. It has no strict requirements on river elevation, making it widely applicable. The use of split-type clamps on the pipeline reduces construction difficulty. It enhances the support and fixation of the pipeline, enabling rapid modular construction to erect the pipeline in riverbeds or areas with weak soil. The construction components are lightweight, simplifying mechanical construction and accelerating foundation construction. This saves on the costs of cast-in-place concrete formwork support and curing, reduces construction waste, and lowers labor costs and overall project cost.

[0090] Example 3

[0091] This invention provides a modular method for assembling a river-crossing pipeline foundation, such as... Figure 6 As shown, it includes:

[0092] S601. Determine the layout locations of multiple modular river-crossing pipeline foundations.

[0093] Using a line-laying tool, lines are laid out above the river channel for the river-crossing pipeline to determine the number of foundations for each modular river-crossing pipeline and to mark the laying locations.

[0094] Specifically, professional surveying tools such as total stations and laying ropes can be used for laying out the lines. The lines are laid out and positioned above the river according to the pre-designed pipeline route (the pipeline laying path). The number of modular pipeline foundations is determined based on the total load of the pipeline, the bearing capacity of each modular pipeline foundation, and the geological conditions of the river, ensuring that the load of each modular pipeline foundation is within its bearing capacity. The positions of the modular pipeline foundations are usually marked using positioning piles, buoys, etc., to provide accurate positioning for subsequent hoisting construction.

[0095] S602. Based on the riverbed elevation and the thickness of the soft soil layer, select the corresponding height of the node precast pile.

[0096] The riverbed elevation refers to the actual height of the riverbed, which determines the depth to which the precast piles for the nodes need to be driven into the riverbed, ensuring that the precast piles can penetrate the surface soil layer and reach the stable soil layer. The thickness of the soft soil layer refers to the thickness of the soft soil layer (soil layer with low bearing capacity) at the riverbed. The thicker the soft soil layer, the higher the required height of the precast piles for the nodes needs to be, and the diameter of the precast piles also needs to be increased accordingly. This ensures that the precast piles can penetrate the soft soil layer and transfer the load to the stable soil layer below, avoiding excessive settlement and instability of the modular river-crossing pipeline foundation.

[0097] S603. The precast load-bearing slabs in the modular river-crossing pipeline foundation are hoisted sequentially to their corresponding locations, so that each precast load-bearing slab sinks to the riverbed.

[0098] Specifically, using cranes and other hoisting equipment, the precast slabs are lifted sequentially to the marked positions. In the underwater environment, positioning equipment is needed to ensure that the precast slabs can be accurately sunk into the corresponding positions. After the precast slabs sink into the riverbed, they will make initial contact with the soft soil layer of the riverbed, providing a bearing platform for the subsequent installation of precast piles.

[0099] S604. Insert the precast pile at the node into the through hole of the corresponding precast slab along the downward end direction, and apply pressure to the upper end of the precast pile at the node so that its lower end is inserted into the soft soil layer.

[0100] In this context, the downward end of the precast pile refers to its lower end. The precast pile is inserted into the circular through-hole of the precast slab along its lower end towards the riverbed, ensuring complete contact between the annular platform of the precast pile and the top surface of the precast slab. This allows the load of the precast slab to be stably transferred to the precast pile, while also restricting the horizontal displacement of the precast slab and ensuring structural stability. Specifically, a pile driver and hydraulic pressing equipment are used to hammer or press the upper end of the precast pile, ensuring full contact between the bottom surface of the precast slab and the soft soil layer of the riverbed, and further driving the precast pile into the riverbed.

[0101] S605. Determine the precast pile extension section, and connect the lower end of each precast pile extension section to the upper end of the corresponding node precast pile using a mechanical sleeve.

[0102] Specifically, the extension section of the precast pile is determined based on the matching elevation of the upper end of the precast pile at the node and the elevation of the pipeline crossing the river.

[0103] The elevation of the top of the precast pile at the node refers to the actual height of the top of the precast pile at the node, while the required elevation of the pipeline crossing the river is the height at which the pipeline needs to be installed. By calculating the height difference between the two, the precast pile extension section with the corresponding height is selected. Using mechanical sleeves for connection can ensure the firmness of the connection and at the same time ensure that the center axis of the precast pile extension section coincides with that of the node precast pile, thus avoiding eccentric loads.

[0104] S606. After the elevation of the upper end of the precast pile extension section reaches the preset height, fix the multiple pipe connection ends to the upper end of the corresponding precast pile extension section respectively.

[0105] Specifically, a threaded engagement method is typically used to connect the transition joints of each pipe connection end to the upper end of the corresponding precast pile extension section. The internal thread of the transition joint matches the external thread of the upper end of the precast pile extension section. After connection, the central axes of the two can be aligned, and the connection is firm. After the connection is completed, the pipe connection end is fixed on the pile body of node precast pile 1. Subsequently, the river-crossing pipeline can be fixed by a split clamp to realize the connection between the pipeline and the modular river-crossing pipeline foundation.

[0106] This invention provides a modular method for assembling a foundation for a river-crossing pipeline. It eliminates the need for intercepting dams and water-stopping supports, thus avoiding disruption to normal river flow and benefiting the river's aquatic environment. It does not impose strict requirements on river elevation, making it widely applicable. The use of split-type clamps on the pipeline reduces construction difficulty. It enhances the support and fixation of the pipeline, enabling rapid modular construction to erect the pipeline in riverbeds or areas with weak soil. The construction components are lightweight, simplifying mechanical construction and accelerating foundation construction. This saves on the costs of cast-in-place concrete formwork support and curing, reduces construction waste, and lowers labor and project costs.

[0107] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A modular river-crossing pipeline foundation, characterized in that, include: Precast piles at nodes, precast slabs for load-bearing, precast pile extension sections, pipe connection ends, and mechanical sleeves; The precast piles at the nodes are columnar with a ring-shaped platform in the middle. The load-bearing precast slab is a plate-shaped body with a through hole at the center. The through hole matches the transverse section of the node precast pile. The lower end of the node precast pile passes through the through hole of the load-bearing precast slab. The load-bearing precast slab is located below the annular platform. The precast pile extension section is columnar, and its lower end is connected to the upper end of the node precast pile through a mechanical sleeve; The pipe connection end is connected to the upper end of the precast pile extension section.

2. The modular river-crossing pipeline foundation according to claim 1, characterized in that, include: The precast pile at the node is cylindrical, and correspondingly, the central through hole of the load-bearing precast slab is a circular through hole.

3. The modular river-crossing pipeline foundation according to claim 1, characterized in that, include: The pipe connection end includes a transition joint and a split clamp. The transition joint is connected to the upper end of the precast pile extension section. The split clamp is composed of two semi-circular ring components spliced ​​together, and has ear plates with bolt holes symmetrically provided on both sides.

4. The modular river-crossing pipeline foundation according to claim 3, characterized in that, include: The split-type clamp is composed of two semi-circular ring components joined together by bolts or clip fasteners.

5. The modular river-crossing pipeline foundation according to claim 4, characterized in that, include: The inner side of the split-type clamp is covered with a rubber or polyurethane cushioning layer.

6. A method for assembling a modular river-crossing pipeline foundation as described in claim 1, characterized in that, include: Determine the locations for the foundations of multiple modular river-crossing pipelines; Based on the riverbed elevation and the thickness of the soft soil layer, select the corresponding height of the node precast pile; The precast load-bearing slabs in the modular river-crossing pipeline foundation are sequentially hoisted to their corresponding locations, so that each precast load-bearing slab sinks to the riverbed. The node precast pile is inserted into the through hole corresponding to the load-bearing precast slab along the downward end direction, and pressure is applied to the upper end of the node precast pile so that its lower end is inserted into the soft soil layer. Determine the precast pile extension section, and connect the lower end of each precast pile extension section to the upper end of the corresponding node precast pile using a mechanical sleeve; Once the elevation of the upper end of the precast pile extension section reaches the preset height, multiple pipe connection ends are fixed to the upper end of the corresponding precast pile extension section.

7. The assembly method for the modular river-crossing pipeline foundation according to claim 6, characterized in that, Determine the locations for the foundations of multiple modular river-crossing pipelines, including: Using a line-laying tool, a line is laid out above the river channel of the river-crossing pipeline to determine the number of modular river-crossing pipeline foundations to be laid out and to mark the laying locations.

8. The assembly method for the modular river-crossing pipeline foundation according to claim 6, characterized in that, Determine the precast pile extension section, including: The precast pile extension section is determined based on the elevation of the upper end of the precast pile at the node and the matching elevation of the river-crossing pipeline.

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