A method of pipe installation

Abstract

The application provides a pipeline construction method, and belongs to the technical field of pipeline construction, and comprises the following steps: excavating a trench; setting a cushion layer laying machine in the trench, the front end of the cushion layer laying machine being provided with a discharging assembly, and the rear end of the cushion layer laying machine being provided with a compaction assembly; setting a pipeline jacking mechanism in the trench and behind the cushion layer laying machine, and sequentially jacking a plurality of pipelines towards the direction of the cushion layer laying machine through the pipeline jacking mechanism, so that the cushion layer laying machine is driven to move towards the front by the pipeline jacking mechanism. The pipeline construction method provided by the application is characterized in that the pipeline jacking mechanism and the cushion layer laying machine are matched through the splicing and movement of the pipeline, the movement of the pipeline serves as the power of the cushion layer laying machine, the cushion layer construction and the pipeline laying are completed synchronously, the construction period is reduced, and the construction progress is accelerated.

Description

Technical Field

[0001] This invention relates to the field of pipeline construction technology, and more specifically to a pipeline construction method. Background Technology

[0002] Water supply and drainage pipeline construction mainly includes two types: trenching and trenchless construction. Trenchless construction methods have restrictions on the shape of the pipeline, the connection structure, as well as the rigidity and strength. Currently, trenching construction is more common for pipelines.

[0003] Trenching can meet the laying requirements of any type of pipeline, but currently the trench excavation and support, subbase construction and pipeline laying are independent of each other, resulting in slow construction progress, long construction period and low efficiency. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of existing technologies, such as trench excavation and support, subbase construction and pipeline laying, which are independent of each other, resulting in slow construction progress, long construction period and low efficiency, thereby providing a pipeline construction method.

[0005] To solve the above-mentioned technical problems, the present invention provides a pipeline construction method, comprising the following steps:

[0006] Excavate trenches;

[0007] A subgrade laying machine is placed in the trench. The front end of the subgrade laying machine has a discharge component, and the rear end of the subgrade laying machine has a compaction component.

[0008] The pipe jacking mechanism is set in the trench and located behind the subbase laying machine. The pipe jacking mechanism pushes multiple pipe sections toward the subbase laying machine in sequence, thereby driving the subbase laying machine to move forward.

[0009] Optionally, the rear end of the subbase laying machine has a push plate, and a pipe groove is provided on the push plate, with the front end of the pipe being engaged in the pipe groove.

[0010] Optionally, support structures are provided on both sides of the trench, and the support structures are provided with tracks for the movement of the subgrade laying machine, and the subgrade laying machine is slidably mounted on the tracks.

[0011] Optionally, the inner sidewalls on both sides of the support structure are provided with a first slide rail in the horizontal direction, and the discharge assembly is provided with a first slide groove that is adapted to the first slide rail.

[0012] Optionally, the support structure includes a plurality of support members connected sequentially along the length of the trench, and adjacent support members along the length of the trench are connected by plug-in connection.

[0013] Optionally, the support member includes two support plates arranged in parallel and spaced apart, and a support member supported between the two support plates;

[0014] The support plate is provided with a flow channel, and the outer wall of the support plate is provided with a slurry outlet hole that communicates with the flow channel.

[0015] Optionally, the front end of the support plate is provided with a vertical insert, the rear end of the support plate has a vertical slot that mates with the vertical insert, and a sealing element is provided between the vertical insert and the vertical slot.

[0016] Optionally, the discharge assembly includes:

[0017] The discharge bin has an inlet and an outlet, with the outlet facing the bottom of the trench;

[0018] A discharge device is installed at the discharge port.

[0019] Optionally, the compaction component includes:

[0020] A compaction frame is mounted on the discharge assembly;

[0021] The compaction component is connected to the compaction frame and compacts the cushion material.

[0022] Optionally, a first leveling component is provided between the discharge component and the compaction component; and a second leveling component is provided behind the compaction component along the laying direction of the subbase.

[0023] Optionally, a feeder is provided above the trench, and the outlet of the feeder is connected to the discharge component of the subgrade laying machine through a feed pipe. The feeder feeds the subgrade material into the discharge component through the feed pipe. During the movement of the discharge component, the subgrade material is sent to the bottom of the trench, and the compaction component compacts the subgrade material at the bottom of the trench.

[0024] Optionally, the feeder includes:

[0025] The feeding box has an inlet and an outlet, the outlet being connected to the discharging assembly via a feeding pipe;

[0026] A first conveyor is disposed in the feeding box, and the first conveyor is used to convey the padding material in the feeding box to the outlet;

[0027] A second conveying component is disposed in the feeding box, and the second conveying component is used to convey the padding material at the inlet to the feeding box;

[0028] A drive unit is connected to the first conveyor and the second conveyor.

[0029] Optionally, the feeding pipe is a flexible hose with a spiral conveyor inside. One end of the spiral conveyor is connected to the output end of the first conveyor, and the first conveyor drives the spiral conveyor to rotate so as to convey the padding material in the feeding pipe.

[0030] Optionally, the feeding tube has multiple sets, and the multiple sets of feeding tubes are detachably connected.

[0031] Optionally, a jacking well is provided at one end of the trench, and a reaction wall is provided in the jacking well. The reaction wall is used to install the pipe jacking mechanism.

[0032] The technical solution of this invention has the following advantages:

[0033] 1. The pipeline construction method provided by this invention includes the following steps: excavating a trench; placing a subbase laying machine in the trench, the front end of the subbase laying machine having a discharge component and the rear end having a compaction component; placing a pipeline jacking mechanism in the trench, located behind the subbase laying machine, and using the pipeline jacking mechanism to sequentially push multiple pipe sections towards the subbase laying machine, thereby driving the subbase laying machine to move forward. The pipeline jacking mechanism and the subbase laying machine cooperate through the splicing and movement of the pipes, the movement of the pipes serving as the power source for the subbase laying machine, and the subbase construction and pipeline laying are completed simultaneously, reducing the construction cycle and accelerating the construction progress.

[0034] 2. The pipeline construction method provided by the present invention has a push plate at the rear end of the subbase laying machine, and a pipe groove is provided on the push plate. The front end of the pipeline is locked in the pipe groove. When the pipeline moves, the push plate is pushed to drive the subbase laying machine to move as a whole. During the movement, it is subjected to a more uniform thrust. The cooperation between the pipe groove and the pipeline improves the stability during the movement.

[0035] 3. The pipeline construction method provided by the present invention has a support structure on both sides of the trench, and a track for the movement of the bedding layer laying machine is provided on the support structure. The bedding layer laying machine is slidably installed on the track, so that the discharge component maintains a horizontal movement state during the movement and is not affected by the unevenness of the bottom of the trench. This achieves rapid and uniform filling of the bedding layer without the need for manual compaction and leveling, thus improving the efficiency of bedding layer laying.

[0036] The inner walls on both sides of the support structure are provided with first slide rails in the horizontal direction, and the discharge component is provided with first slide grooves that are adapted to the first slide rails. The support structure is relatively long, and it is simpler to set slide rails on it than to open grooves. The matching and installation of the first slide rails and the first slide grooves is quick and simple, and ensures the horizontal state of the discharge component during movement.

[0037] 4. The pipeline construction method provided by the present invention includes a support structure comprising multiple support components connected sequentially along the length of the trench. Adjacent support components along the length of the trench are connected by plug-in joints. During installation, multiple sets of support components connected by plug-in joints form a support structure. The structure can be prefabricated in a modular manner in advance and quickly assembled according to the trench excavation dimensions. After construction, it can be recycled and disassembled for easy reuse and to save engineering costs.

[0038] 5. The pipeline construction method provided by the present invention includes two parallel and spaced support plates and a support member supported between the two support plates; the support plates are provided with flow guiding channels, and the outer side wall of the support plates is provided with slurry outlet holes communicating with the flow guiding channels. During the contact and movement of the support plates with the trench sidewall, lubricating mud is injected into the trench sidewall through the flow guiding channels and slurry outlet holes, which reduces the jacking friction resistance and plays a protective role, improves the installation efficiency of the support structure, and makes the installation simple and quick.

[0039] 6. The pipeline construction method provided by the present invention has a vertical insert at the front end of the support plate and a vertical slot at the rear end of the support plate that mates with the vertical insert. A sealing element is provided between the vertical insert and the vertical slot. Adjacent support plates are connected by the vertical insert and the vertical slot, which facilitates installation. The sealing element can achieve a good water-stopping effect.

[0040] 7. The pipeline construction method provided by the present invention includes a discharge assembly comprising a discharge bin and a discharge device. The discharge device is located at the discharge port of the discharge bin. The discharge device can discharge the material in the discharge bin at a controlled rate and continuously and evenly feed it into the bottom of the trench, thereby improving the uniformity of feeding and further improving the subsequent compaction effect.

[0041] 8. The pipeline construction method provided by the present invention includes a compaction assembly comprising a compaction frame and a compaction component. The compaction frame is mounted on the discharge assembly and moves forward together with the discharge assembly. The discharge assembly transports the bedding material to the bottom of the trench. Under the action of the compaction component, the bedding is compacted. The compacted bedding enhances the foundation load and improves the foundation stability, protecting the pipeline from damage.

[0042] 9. In the pipeline construction method provided by the present invention, a first leveling component is provided between the discharge component and the compaction component. The first leveling component levels the bedding material falling from the discharge component, which facilitates the subsequent compaction process and makes the compaction more uniform. Along the bedding laying direction, a second leveling component is provided behind the compaction component. After the bedding is compacted, the second leveling component can scrape away the material protruding from the surface of the compacted bedding, so as to avoid it causing unevenness to the subsequent pipeline laying.

[0043] 10. The pipeline construction method provided by the present invention includes a feeder installed above the trench. The feeder delivers the bedding material to the discharge assembly. The feeder includes a feeding box, a first conveying component, a second conveying component, and a driving component. The first conveying component delivers the bedding material in the feeding box to the outlet. The second conveying component delivers the bedding material at the inlet to the feeding box. The cooperation between the first and second conveying components ensures that the bedding material entering from the inlet smoothly and evenly enters the feeding pipe, avoiding the accumulation of bedding material and avoiding excessive burden on the feeding pipe.

[0044] 11. The pipeline construction method provided by the present invention has a flexible hose structure for the feeding pipe and a spiral conveying component inside the feeding pipe. The spiral conveying component rotates to smoothly and evenly feed the padding material into the discharge hopper. Moreover, the spiral conveying is less prone to jamming or blockage. The flexible hose structure also prevents the cross bracing of the support structure from interfering with the movement of the discharge component.

[0045] 12. The pipeline construction method provided by the present invention has multiple sets of feeding pipes, which are detachably connected. During the movement of the discharge component, the feeder does not need to move and can be set up near the top well. For every unit distance the discharge component moves, an additional set of feeding pipes is added, which avoids instability to the trench slope during the movement of the feeder and improves work efficiency.

[0046] 13. The pipeline construction method provided by the present invention includes a jacking well at one end of the trench, a reaction wall in the jacking well, and the reaction wall is used to install the pipeline jacking mechanism to provide reaction support when the pipeline jacking mechanism applies force, which is more conducive to the transmission of force. Attached Figure Description

[0047] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0048] Figure 1 This is a schematic diagram of a specific implementation of the pipeline construction method provided in the embodiments of the present invention;

[0049] Figure 2 for Figure 1 Schematic diagram of the intermediate support structure;

[0050] Figure 3 for Figure 1 Schematic diagram of the structure of the discharge assembly;

[0051] Figure 4 for Figure 1 Schematic diagram of the middle unloader;

[0052] Figure 5 for Figure 1 Schematic diagram of the structure of the intermediate support component;

[0053] Figure 6 for Figure 5 Schematic diagram of the structure of the middle support plate;

[0054] Figure 7 for Figure 5 Top view of the middle support plate;

[0055] Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure of the middle BB;

[0056] Figure 9 for Figure 7 Schematic diagram of the sectional structure of the middle AA section;

[0057] Figure 10 for Figure 5 Schematic diagram of the middle support component;

[0058] Figure 11 for Figure 10 A schematic diagram of the structure of the first support component;

[0059] Figure 12 for Figure 10 Structural diagram of the third support component;

[0060] Figure 13 for Figure 5 A top view of the vertical insert structure;

[0061] Figure 14 for Figure 5 A schematic diagram of the connection structure between the vertical plug and the vertical slot;

[0062] Figure 15 This is a top view of the excavation and support construction device provided in this invention.

[0063] Figure 16 for Figure 15 A schematic diagram of the top iron structure in the middle;

[0064] Figure 17 for Figure 15 A schematic diagram of the front structure of the excavation unit.

[0065] Figure 18 for Figure 15 Schematic diagram of the rear structure of the excavation unit;

[0066] Figure 19 for Figure 15 A schematic diagram of the spiral soil conveying pipe in the diagram;

[0067] Figure 20 for Figure 15 A schematic diagram of the middle shell structure.

[0068] Figure 21 for Figure 1 Schematic diagram of the intermediate pressure frame;

[0069] Figure 22 for Figure 1 Schematic diagram of the structure of the medium-pressure solid component;

[0070] Figure 23 for Figure 1 A schematic diagram of the structure of the feed pipe connection.

[0071] Explanation of reference numerals in the attached figures:

[0072] 1. Discharge assembly; 2. Compaction assembly; 3. Pipe jacking mechanism; 4. Pipe; 5. Jacking plate; 6. Pipe groove; 7. First slide rail; 8. First chute; 9. Support component; 10. Support plate; 11. Flow guide channel; 12. Slurry outlet; 13. Vertical insert; 14. Vertical slot; 15. Sealing component; 16. Discharge hopper; 17. Inlet; 18. Outlet; 19. Unloader; 20. Compaction frame; 21. Compaction component; 22. First leveling component; 23. Second leveling component; 24. Feed pipe; 25. Feed box; 26. Inlet; 27. Outlet; 28. First conveyor component; 29. ​​Second conveyor component 30. Feeding drive component; 31. Screw conveyor component; 32. Jacking shaft; 33. Reaction wall; 34. Inner plate; 35. Outer plate; 36. Mounting cavity; 37. Grouting pipe; 38. Connecting plate; 39. Support component; 40. Clamping plate; 41. First support component; 42. Second support component; 43. Third support component; 44. Groove; 45. Sealing protrusion; 46. First mounting cavity; 47. Excavation device; 48. Jacking drive component; 49. Pad block; 50. Top iron; 51. Shell; 52. Panel; 53. Screw soil conveying pipe; 54. Front shell; 55. Rear shell; 56. Support plate; 57. Pipe through groove. Detailed Implementation

[0073] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0074] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0075] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0076] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0077] Water supply and drainage pipeline construction mainly includes two types: trenching and trenchless construction. Common trenchless construction methods include pipe jacking and horizontal directional drilling, which have been rapidly promoted due to their advantages such as not excavating the ground surface and having little impact on traffic. Trenching construction methods mainly include slope protection, transverse sheet pile support, and steel sheet pile support.

[0078] Trenchless construction methods impose limitations on the shape, connection structure, rigidity, and strength of the pipelines. While trenching can accommodate any type of pipeline, the current trench excavation and support, as well as the construction of the bedding layer and pipeline laying, are independent processes, resulting in slow progress, large site requirements, and long construction cycles. Furthermore, current trenching techniques have numerous drawbacks. For example, in trench support: the transverse plate support method has a high material wastage rate, and manual operation of internal supports poses significant safety hazards; the steel sheet pile support method makes it difficult to control the trench alignment, and the internal support structure requires on-site installation, making the process cumbersome and complex. In trench excavation: the method of using excavating machinery to excavate from top to bottom while moving is inefficient.

[0079] The pipeline construction method provided in this embodiment involves simultaneous trench excavation and support, achieving integrated subgrade construction and pipeline laying, reducing the construction cycle and accelerating the construction progress.

[0080] like Figure 1 As shown, a specific implementation of the pipeline construction method provided in this embodiment includes the following steps:

[0081] Excavate a trench; at both ends of the trench, construct a jacking shaft 32 and a receiving shaft, and install a reaction wall 33 in the jacking shaft 32;

[0082] A subgrade laying machine is placed in the trench. The front end of the subgrade laying machine has a discharge component 1, and the rear end of the subgrade laying machine has a compaction component 2.

[0083] The pipe jacking mechanism 3 is set in the trench and located behind the subbase laying machine. The pipe jacking mechanism pushes multiple pipe sections 4 sequentially toward the subbase laying machine, thereby driving the subbase laying machine to move forward.

[0084] The pipeline jacking mechanism 3 and the subbase laying machine cooperate by splicing and moving the pipeline. The movement of the pipeline serves as the power for the subbase laying machine. The subbase construction and pipeline laying are completed simultaneously, which reduces the construction cycle and speeds up the construction progress.

[0085] like Figures 1 to 3 As shown, the pipeline construction method provided in this embodiment includes support structures on both sides of the trench. These support structures are equipped with tracks for the movement of the bedding layer laying machine, which is slidably mounted on these tracks. This ensures that the discharge assembly 1 remains horizontal during movement, unaffected by unevenness at the bottom of the trench. This achieves rapid and uniform filling of the bedding layer, eliminating the need for manual compaction and leveling, and integrating discharge and compaction to improve bedding layer laying efficiency. Specifically, the tracks can be prefabricated on the support structures or installed separately after the support structures are installed, ensuring the tracks remain level during installation.

[0086] like Figure 2 and Figure 3 As shown, in the pipeline construction method provided in this embodiment, first slide rails 7 are provided on the inner sidewalls of both sides of the support structure in a horizontal direction, and a first sliding groove 8 adapted to the first slide rails 7 is provided on the discharge assembly 1. Since the support structure is relatively long, providing slide rails on it is more convenient than creating sliding grooves. The installation of the first slide rails 7 and the first sliding groove 8 is quick and simple, and ensures the horizontal state of the discharge assembly 1 during movement. Alternatively, as an alternative implementation, the first slide rails 7 can be provided on the discharge assembly 1, and the first sliding groove 8 can be provided on the support structure.

[0087] like Figure 5As shown, the pipeline construction method provided in this embodiment includes a support structure comprising multiple support members 9 connected sequentially along the length of the trench. Adjacent support members 9 along the length of the trench are connected by plug-in joints. During installation, the multiple sets of sequentially plugged-in support members 9 form a support structure. This structure can be prefabricated modularly in advance, quickly assembled according to the trench excavation dimensions, and can be recycled and disassembled after construction, facilitating reuse and saving project costs.

[0088] like Figure 5 As shown, the pipeline construction method provided in this embodiment includes a support member 9 comprising two parallel and spaced support plates 10 and a support member 39 supported between the two support plates 10. Each support plate 10 has a flow channel 11, and its outer side wall has a slurry outlet hole 12 communicating with the flow channel 11. During the contact and movement of the support plate 10 with the trench sidewall, lubricating mud is injected into the trench sidewall through the flow channel 11 and the slurry outlet hole 12. This reduces the jacking friction and acts as a wall protector, improving the installation efficiency of the support structure and making installation simple and quick.

[0089] The grout outlet 12 is equipped with a filter screen to prevent soil and rocks on the trench sidewall from entering the grout outlet 12 and causing blockage during the installation of the support plate 10. Blockage would affect lubrication during subsequent movement and reduce installation efficiency. The filter screen is a metal filter screen, which has better stress resistance.

[0090] Specifically, such as Figure 5 As shown, there are multiple sets of slurry outlet holes 12, and the array of multiple sets of slurry outlet holes 12 is arranged on the support plate 10, so that the lubricating mud is injected into the outer wall of the support plate 10 more evenly, avoiding the situation of large local resistance during movement. Specifically, the slurry outlet holes 12 are in a square array. Alternatively, as an alternative embodiment, the slurry outlet holes 12 can also be in a circular array.

[0091] like Figures 6 to 9As shown, the support plate 10 includes an inner plate 34 and an outer plate 35 spaced apart. An installation cavity 36 is formed between the inner plate 34 and the outer plate 35, and a grouting pipe 37 is disposed within the installation cavity 36. A flow channel is formed inside the grouting pipe 37. A grout outlet 12 is disposed on the outer plate 35. Several connecting plates 38 are provided between the inner plate 34 and the outer plate 35 for fixed connection. The outer plate 35 is used to contact the trench sidewall. Lubricating slurry is injected through the grout outlet 12 on the outer plate 35. The inner plate 34 provides protection for the grouting pipe 37, and the connecting plates 38 improve the stability of the support plate 10. Specifically, multiple sets of connecting plates 38 can be provided and connected at multiple locations for better stability. Alternatively, as an alternative implementation, the support plate 10 can be a split structure or an integrated structure. There is no limitation on whether the installation cavity 36 is closed or open. The installation cavity 36 can also be one or more sets, adapted to the number of grouting pipes 37. Each set of grouting pipes 37 is installed in the corresponding installation cavity 36. Each row of grout outlet holes 12 is connected to a set of grouting pipes 37. Multiple sets of grouting pipes 37 are connected to the main pipe set on the ground through pipes. A one-way valve is installed on the grouting pipe 37.

[0092] like Figure 6 As shown, the bottom of the support plate 10 has a pointed structure, which reduces resistance during the movement of the support plate and improves installation efficiency. The pointed structure can be an equilateral triangle or a right triangle. Alternatively, as an alternative embodiment, the bottom of the support plate 10 can also be a planar structure.

[0093] like Figures 10 to 12 As shown, the support member 39 includes multiple detachable sections. Different numbers of these sections can be selected and connected according to the width of different grooves. It has strong versatility and can be prefabricated for on-site assembly.

[0094] Specifically, the support member 39 includes a first support member 41, a second support member 42, and a third support member 43. The first support member 41 is connected to the inner wall of one of the support plates 10; the second support member 42 is connected to the inner wall of another support plate 10; and the third support member 43 is connected between the first support member 41 and the second support member 42. The third support member 43 has multiple detachable segments, and the number of third support members 43 is selected according to the actual width of the trench. The first support member 41, the second support member 42, and the third support member 43 can be hollow cylindrical structures.

[0095] The first support member 41 and the second support member 42 are respectively connected to the support plate 10 by threads, and the multiple sections of the third support member 43 are connected by flanges. The threaded holes in the threaded connection can be prefabricated, eliminating the need for subsequent positioning during the selection process. The flange connection facilitates installation and disassembly. Depending on the actual trench width, different numbers of third support members 43 can be selected for modular assembly. Alternatively, as an alternative implementation, the first support member 41 and the second support member 42 can also be connected to the support plate 10 via flanges.

[0096] like Figure 6 , Figure 7 , Figure 13 and Figure 14 As shown, in the pipeline construction method provided in this embodiment, the front end of the support plate 10 is provided with a vertical insert 13, and the rear end of the support plate 10 has a vertical slot 14 that mates with the vertical insert 13. A sealing element 15 is provided between the vertical insert 13 and the vertical slot 14. Adjacent support plates 10 are connected by the vertical insert 13 and the vertical slot 14, which facilitates installation. The sealing element 15 provides a good water-stopping effect. The vertical slot 14 can be formed between the inner plate 34 and the outer plate 35, and the position of the vertical insert 13 is restricted by the clamping plate 40. Alternatively, the vertical slot 14 can be provided separately. The inlet of the vertical slot 14 is provided with a flared opening to facilitate the insertion of the vertical insert 13. The vertical slot 14 has an open structure at both ends to facilitate subsequent removal. An elastic pad is attached to the surface of the clamping plate 40 that contacts the vertical insert 13, which can play a buffering role during the jacking process.

[0097] Specifically, the vertical insert 13 has a groove 44 around its perimeter, and the sealing member 15 is fitted into the groove 44. A sealing protrusion 45 is provided on the outer wall of the sealing member 15, and there is an angle between the sealing protrusion 45 and the sealing member 15. The sealing member 15 is a rubber sealing ring, and the sealing protrusion 45 is provided on the sealing member 15. During the insertion of adjacent vertical inserts 13 into the vertical slot 14, the sealing protrusion 45 is constantly under stress, maintaining a seal between the inner and outer sides of the groove. Furthermore, the sealing protrusion 45 creates a gap between the inner wall of the vertical slot 14 and the outer wall of the vertical insert 13. Combined with the cushioning effect of the elastic pad on the retaining plate 40, this allows for relative attitude adjustment between adjacent support plates 10.

[0098] like Figure 15As shown, the support structure is installed using an excavation support construction device, which includes a jacking device and an excavation device 47. The jacking device is used to push the support member 9 along the length of the trench, or to push the support structure. The tail of the excavation device 47 is connected to the support member or the support structure, and its head is used to move forward and excavate along the trench. The jacking device pushes the support member 9 and the excavation device 47 forward simultaneously, realizing the forward segmental splicing and installation of the support plate 10 while excavating. The installation is simple and quick, eliminating the need for large excavation equipment to move and excavate from top to bottom. Large equipment excavation occupies a long section of the road surface and is inefficient. This invention only requires the installation of the equipment near the jacking well 32 and the receiving well, without occupying a long route, resulting in high construction efficiency. In particular, a first guide rail is set in the jacking well 32 along the length of the trench. The excavation device 47 is pushed forward along the first guide rail, ensuring the accuracy of the direction of the excavation device 47 during the initial excavation. The output end of the jacking device is connected to the vertical slot 14 of the support member, and the tail of the excavation device 47 is connected to the vertical plug 13 of the support member 9.

[0099] like Figure 15 As shown, the jacking device includes a jacking drive component 48, which is set perpendicular to the reaction wall 33. The jacking drive component 48 is a horizontally set jack, and a jack fixing bracket is set to realize the installation of the jack.

[0100] like Figure 15 and Figure 16 As shown, the output end of the jacking drive 48 is provided with a pad 49 and a top iron 50, and the top iron 50 is adapted to the tail of the support plate 10. The pad 49, placed at the front end of the jacking drive 48, increases the force-bearing area and jacking length, ensuring the normal operation of the jacking drive 48. The top iron 50 ensures that the jacking force is evenly transmitted to the support, guaranteeing the jacking effect. The top iron 50 has load-bearing blocks at both ends, which are connected by connecting blocks. When jacking, the load-bearing blocks are pushed into the vertical slots 14 of the support, thereby pushing the support plate 10 to move. The jacking drive 48 acts symmetrically on the load-bearing blocks, and the resultant force point of the jacking drive 48 is located near the centroid of the support. The structure of the pad 49 is similar to that of the top iron 50.

[0101] like Figures 17 to 20As shown, the excavation device 47 includes a housing 51, a panel 52, an excavation drive component, and a spiral conveying pipe 53. The housing 51 has a rectangular structure, and its rear end has a port adapted to the head of the support plate 10. The panel 52 has at least one set, located at the front end of the housing 51, with a cutterhead mounted on its front side. The excavation drive component is mounted on the panel 52 and connected to the cutterhead. The spiral conveying pipe 53 is connected to the bottom of the housing 51. The rectangular structure of the housing 51 is adapted to the shape of the trench. During excavation, the excavation drive component drives the cutterhead to rotate, and the excavated soil is transported to the outside through the spiral conveying pipe 53, ensuring normal cutting operation of the cutterhead. The bottom of the panel 52 has at least one set of outlet ports for installing the spiral conveying pipe 53, which contains a flexible spiral. The height of the housing 51 is slightly higher than the ground to ensure that the required trench depth can be achieved and that no soil falls. The excavation drive is a rotary motor, which is located on the rear side of the panel 52. The output end of the excavation drive passes through the panel 52 and is connected to the cutter head to drive the cutter head to rotate.

[0102] The panel 52 and the housing 51 are detachably connected. Each panel 52 and cutterhead are independently configured. The cutterhead is a variable-diameter type, allowing for different numbers of panels 52 to be set according to the actual cutting conditions, accommodating various trench excavation widths and depths. The housing 51 includes a front housing 54 and a rear housing 55, with the rear housing 55 located behind the front housing 54. A deviation correction device is installed inside the rear housing 55 and connected to the front housing 54. Multiple sets of deviation correction devices are provided at the junction of the front housing 54 and the rear housing 55, meeting the deviation correction requirements during trench excavation.

[0103] like Figures 1 to 3 As shown in this embodiment, the pipeline construction method includes a push plate 5 at the rear end of the subbase laying machine. A pipe groove 6 is provided on the push plate 5, and the front end of the pipe 4 is engaged in the pipe groove 6. When the pipe moves, the push plate drives the entire subbase laying machine to move, resulting in a more uniform thrust during movement. The cooperation between the pipe groove and the pipe improves stability during movement. Specifically, the bottom of the push plate 5 is arc-shaped, and the arc matches the maximum cross-section of the pipe 4, further enhancing stability during the pushing process.

[0104] like Figures 1 to 4As shown, the pipeline construction method provided in this embodiment includes a discharge assembly 1 comprising a discharge bin 16 and a discharge device 19. The discharge bin 16 has an inlet 17 and an outlet 18, with the outlet 18 facing the bottom of the trench. The discharge device 19 is disposed at the outlet 18. The discharge device 19 can discharge the material in the discharge bin 16 at a controlled rate and continuously and evenly feed it into the bottom of the trench, improving the uniformity of feeding and further enhancing the subsequent compaction effect. The discharge device 19 is a star-shaped discharge device, which has stable performance and provides uniform and continuous discharge. The discharge device 19 can rotate in both directions. The width of the discharge bin 16 is basically the same as the width of the trench, requiring only space for the drive installation of the discharge device 19. The wider discharge width also improves the uniformity of the bedding layer.

[0105] Specifically, the outlet end of the feeding pipe 24 is slidably mounted on the inlet 17 via a second slide rail structure, which is arranged along the width direction of the groove. A first driving member is provided on the outlet hopper 16, and the output end of the first driving member is connected to the outlet end of the feeding pipe 24 to drive the outlet end of the feeding pipe 24 to move along the second slide rail structure. During feeding, the first driving member can control the feeding pipe 24 to reciprocate at a uniform speed in the width direction of the groove, ensuring uniformity of material output in the width direction. Specifically, a second chute is provided at the inlet 17, and a second slide rail or sliding buckle is provided on the outlet end of the feeding pipe 24. The second slide rail or sliding buckle is fitted into the second chute to realize relative movement between the outlet end of the feeding pipe 24 and the inlet 17. The first driving member can be a linear module or a telescopic motor. The inlet 17 has a rectangular structure, which can accommodate material feeding over a longer length, allowing the padding material to enter the outlet hopper 16 evenly.

[0106] like Figure 3 As shown, a support plate 56 is provided on the outside of the feed inlet 17, and a pipe groove 57 is provided on the support plate 56. The outlet end of the feeding pipe 24 passes through the pipe groove 57 and is located at the feed inlet 17, so that the axis of the outlet end of the feeding pipe 24 is parallel to the center line of the feed inlet 17, ensuring that the padding material can enter the discharge bin vertically and smoothly, and avoiding folding or other issues at the discharge end of the feeding pipe 24 at the feed inlet 17 that affect the feeding state.

[0107] like Figure 1 As shown, the lower part of the discharge bin 16 has a constricted structure, which facilitates the discharge of the padding material inside the discharge bin 16. The lower part can be an inverted pyramidal structure or an inverted conical structure.

[0108] like Figure 1 , Figure 21 and Figure 22As shown, the pipeline construction method provided in this embodiment includes a compaction assembly 2 comprising a compaction frame 20 and a compaction element 21. The compaction frame 20 is disposed on the discharge assembly 1; the compaction element 21 is connected to the compaction frame 20 and compacts the subbase material. Under the action of the compaction element 21, the subbase is compacted, the compacted subbase enhances the foundation load, improves foundation stability, and protects the pipeline from damage.

[0109] Specifically, the compaction frame 20 is movably connected to the discharge assembly 1. This movable connection allows the compaction component 21 to compact to different thicknesses depending on the amount of material falling from the front cushion layer. Specifically, a connecting plate is provided behind the discharge assembly 1, with a rectangular groove formed on the connecting plate. A U-shaped ring is installed in the rectangular groove, and the compaction frame 20 is connected to the U-shaped ring.

[0110] like Figure 21 and Figure 22 As shown, the compaction element 21 has a cylindrical structure, and the compaction frame 20 has a first mounting cavity 46. The compaction element 21 is rotatably disposed in the first mounting cavity 46. The axial direction of the compaction element 21 is parallel to the width direction of the groove. During the compaction process, the compaction element 21 moves and rotates simultaneously, resulting in a better compaction effect. The compaction frame 20 has a rectangular frame structure, with the first mounting cavity 46 disposed inside. The length dimension of the compaction frame 20 is consistent with the width dimension of the groove, allowing for the installation of longer compaction elements 21 and ensuring the compaction range. Alternatively, as an alternative embodiment, the compaction element 21 can also be of other shapes, such as a rectangular block structure. The rectangular block structure compacts by its own weight and is not designed to rotate.

[0111] like Figure 1 As shown in the embodiment, the pipeline construction method provided in this embodiment includes a first leveling component 22 between the discharge component 1 and the compaction component 2; and a second leveling component 23 positioned behind the compaction component 2 along the bedding layer laying direction. The first leveling component 22 levels the bedding layer material falling from the discharge component 1, facilitating the subsequent compaction process and making the compaction more uniform. The second leveling component 23 can scrape away any protruding material on the surface of the compacted bedding layer, preventing it from causing unevenness in the subsequent pipeline laying. It also controls the thickness of the compacted bedding layer, ensuring the flatness after compaction. The first leveling component 22 and the second leveling component 23 can be either flat or curved structures.

[0112] like Figure 1As shown in the embodiment, the pipeline construction method provided in this case includes a feeding machine installed above the trench. The outlet of the feeding machine is connected to the discharge assembly 1 of the subgrade laying machine via a feeding pipe 24. The feeding machine feeds subgrade material into the discharge assembly 1 through the feeding pipe 24. During its movement, the discharge assembly 1 delivers the subgrade material to the bottom of the trench. The compaction assembly 2 compacts the subgrade material at the bottom of the trench. The feeding machine is installed on the ground near the jacking shaft 32.

[0113] like Figure 1 As shown, the pipeline construction method provided in this embodiment includes a feeding machine comprising a feeding box 25, a first conveying component 28, a second conveying component 29, and a feeding drive component 30. The feeding box 25 has an inlet 26 and an outlet 27, the outlet 27 being connected to the discharge assembly 1 via a feeding pipe 24. The first conveying component 28 is disposed in the feeding box 25 and is used to convey the underlay material in the feeding box 25 to the outlet 27. The second conveying component 29 is disposed in the feeding box 25 and is used to convey the underlay material at the inlet 26 into the feeding box 25. The feeding drive component 30 is connected to the first conveying component 28 and the second conveying component 29. The cooperative use of the first conveying component 28 and the second conveying component 29 ensures that the underlay material entering from the inlet 26 smoothly and evenly enters the feeding pipe 24, avoiding the accumulation of underlay material and preventing excessive burden on the feeding pipe 24. The feeding box 25 has a rectangular structure, the feeding drive 30 is a motor, the feeding drive 30 is located on the top of the feeding box 25, and the first conveyor 28 is horizontally located inside the feeding box 25. The feeding drive 30 drives the first conveyor 28 to rotate through belt drive or chain drive.

[0114] Specifically, the first conveyor 28 and the second conveyor 29 are spiral conveyor shaft structures, and the feeding drive 30 simultaneously drives the first conveyor 28 and the second conveyor 29 to rotate. Specifically, the first conveyor 28 and the second conveyor 29 are arranged parallel to each other. Alternatively, as an alternative embodiment, the first conveyor 28 and the second conveyor 29 can also be other conveying structures, such as belt conveyors or chute conveyors. Two sets of drives are connected to the output shaft of the feeding drive 30, respectively connected to the first conveyor 28 and the second conveyor 29, to achieve simultaneous driving of both.

[0115] A feed tank is provided at the inlet of the feeding box 25. The feed tank has a bottom-narrowing structure. The feed tank can provide cushioning for the padding material entering the feeding box 25. The padding material is first sent into the feed tank for storage, and then evenly fed into the feeding box 25 under the action of the second conveyor 29.

[0116] like Figure 1As shown in the embodiment, the pipeline construction method provided in this embodiment uses a flexible hose as the feeding pipe 24. A spiral conveyor 31 is installed inside the feeding pipe 24. One end of the spiral conveyor 31 is connected to the output end of the first conveyor 28. The first conveyor 28 drives the spiral conveyor 31 to rotate, thereby conveying the bedding material in the feeding pipe 24. The rotation of the spiral conveyor 31 smoothly and evenly feeds the bedding material into the discharge hopper 16. During spiral conveying, it is less prone to jamming or clogging. The flexible hose structure also prevents interference from the cross bracing of the support structure during the movement of the discharge assembly. The spiral conveyor 31 contacts the inner wall of the feeding pipe 24, preventing material jamming in gaps.

[0117] like Figure 23 As shown, the pipeline construction method provided in this embodiment has multiple sets of feeding pipes 24, which are detachably connected. During the movement of the discharge assembly 1, the feeder does not need to move and can be placed near the top well 32. For every unit distance the discharge assembly 1 moves, an additional set of feeding pipes 24 is added, which avoids instability to the trench slope during the movement of the feeder and improves work efficiency.

[0118] like Figure 1 As shown in the embodiment, the pipeline construction method provided in this case includes a jacking well 32 at one end of the trench, and a reaction wall 33 within the jacking well 32. The reaction wall 33 is used to install the pipeline jacking mechanism 3. The reaction wall provides reaction support when the pipeline jacking mechanism 3 applies force, which is more conducive to the transmission of force. The pipeline jacking mechanism 3 has a structure similar to the jacking device. During pipeline laying, a second guide rail adapted to the pipeline is installed in the jacking well 32 to guide the movement of the pipeline.

[0119] The pipeline construction method provided in this embodiment is achieved through two parts: trench construction and pipeline laying. In the trench construction section, a jacking excavator 47 is used to excavate the soil to form a trench. A specially designed support system, matched to the excavator 47, is assembled as the excavator 47 moves forward, achieving synchronous support for the trench sidewalls. The jacking system provides power for the forward movement of the excavator 47 and the support system. In the pipeline laying section, a bedding layer laying machine connected to the support system and capable of moving freely along the trench's extension direction is used to fill and compact the bedding layer material. During the laying process, a feeding system continuously transports the bedding layer material, and the jacking laying system provides the propulsion power for the bedding layer laying system, simultaneously completing the pipeline laying. The pipeline laying section is connected to the trench construction section, completing the simultaneous laying of the bedding layer and pipeline based on the trench construction.

[0120] Specifically, the pipeline construction method includes the following steps: Select and assemble an excavation device 47 of appropriate size according to the designed pipeline trench excavation width and depth; Assemble the prefabricated support plate 10 and support component 39 into a support system of matching size;

[0121] Select the appropriate top iron 50 and multiple sets of pads 49;

[0122] Construct jacking shaft 32 and receiving shaft at both ends of the trench. Jacking shaft 32 can be constructed at the location of a redesigned maintenance shaft. Temporary receiving shafts can be constructed simply, only needing to meet the space requirements for the excavation device 47 to be lifted out.

[0123] The excavation device 47 is hoisted into the first guide rail in the jacking shaft 32 to ensure that the height of the shell 51 of the excavation device 47 is higher than the ground.

[0124] The output end of the jacking drive 48 extends out, jacking the excavation device 47 into the soil. At the same time, the cutting and soil discharge functions of the excavation device 47 are activated. The cut soil is simultaneously discharged to the ground on both sides of the excavated trench via the spiral soil conveying pipe 53.

[0125] The support component 9 is hoisted into the jacking shaft 32. The main pipe is laid on the ground on both sides of the support component at a relatively close position. The grouting pipe 37 on the support component 9 is connected to the main pipe. The one-way valve installed on the grouting pipe 37 is opened. The lubricating mud is injected into the trench sidewall through the grout outlet 12, which reduces the jacking friction and plays a protective role. At the same time, the output end of the jacking drive component 48 extends out and pushes the vertical insert 13 of the support component 9 into the vertical slot 14 at the rear end of the excavation device 47 and continues to push forward.

[0126] Retract the output end of the jacking drive component 48, and hoist each set of support components 9 into the well in sequence for docking and jacking. Repeat the connection of the grouting pipe 37 and the opening of the one-way valve in the previous step. When the grouting volume of the side wall is sufficient, the one-way valve on the subsequent trench support component can be left unopened. Grouting can be activated when needed. During the jacking process, the jacking route is controlled by the deviation correction device.

[0127] After jacking to the designed distance, the excavation device 47 is hoisted out;

[0128] Install the pipe jacking mechanism 3 in the jacking shaft 32, then install the second guide rail, hoist the subbase laying machine into the shaft, install it on the support structure through the first slide rail structure, and install the feeding machine on the ground near the jacking shaft 32.

[0129] Add cushioning material to the feeding box 25, start the feeding drive 30, and the first conveyor 28 and the second conveyor 29 rotate to convey the cushioning material to the feeding pipe 24. Under the action of the screw conveyor 31 in the feeding pipe 24, the cushioning material is sent to the discharge bin 16. During this period, control the outlet end of the feeding pipe 24 to reciprocate at the inlet 17 of the discharge bin 16 to ensure the uniformity of feeding in the width direction of the trench. When the cushioning material basically fills the discharge bin 16, the pipe pushing mechanism 3 extends and pushes the discharge assembly 1 forward through the matching top iron. At the same time, start the unloader 19 to evenly spread the cushioning material at the bottom of the trench. During the process, continuously replenish the cushioning material to the feeding box 25. The control of the compacted thickness of the cushioning is achieved by adjusting the pushing speed, the rotation speed of the unloader 19, and the weight of the compaction component 21.

[0130] When the jacking distance reaches the length of a single pipe section, the pipe jacking mechanism 3 is retracted, material replenishment and conveying are suspended, and the material discharge work is suspended; the feeding pipe 24 is extended and connected, and the pipe 4 is hoisted into the jacking shaft 32. The pipe jacking mechanism 3 extends and pushes the pipe 4 forward, pushing the pipe opening into the pipe groove 6 on the jacking plate 5; the material replenishment, conveying and unloading work is restarted, and the pipe jacking mechanism 3 continues to extend to carry out the bedding layer paving and pipe laying;

[0131] Each time the jacking distance reaches the length of a single pipe section, the pipe jacking mechanism 3 is retracted, material replenishment and conveying are suspended, and unloading is halted; the feeding pipe 24 is extended and connected, and pipe 4 is hoisted into the jacking shaft 32 to complete the connection between the front and rear pipes 4; material replenishment, conveying, unloading, and jacking operations are restarted. The above operations are repeated until the subbase construction and pipe laying work in the section are completed;

[0132] Equipment dismantling and jacking shaft construction were carried out.

[0133] The backfill inside the trench is compacted. When the backfill reaches an appropriate height, the support component 39 is removed. After continuing backfilling, the support structure is pulled out section by section with the help of pipe pullers and similar mechanical equipment. The backfilled soil in the hollow area is compacted, and the road surface in the construction area is restored.

[0134] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A pipeline construction method, characterized in that, Includes the following steps: Excavate trenches; The subbase laying machine is placed in the trench. The front end of the subbase laying machine has a discharge component (1), and the rear end of the subbase laying machine has a compaction component (2). The pipe jacking mechanism (3) is set in the trench and located behind the subbase laying machine. The pipe jacking mechanism pushes multiple pipe sections (4) toward the subbase laying machine in sequence, thereby driving the subbase laying machine to move forward.

2. The pipeline construction method according to claim 1, characterized in that, The rear end of the subbase laying machine has a push plate (5), and a pipe groove (6) is provided on the push plate (5). The front end of the pipe (4) is stuck in the pipe groove (6).

3. The pipeline construction method according to claim 1, characterized in that, Support structures are provided on both sides of the trench, and the support structures are equipped with tracks for the movement of the subbase laying machine, which is slidably mounted on the tracks.

4. The pipeline construction method according to claim 3, characterized in that, The inner sidewalls on both sides of the support structure are provided with a first slide rail (7) in the horizontal direction, and the discharge assembly (1) is provided with a first slide groove (8) that is adapted to the first slide rail (7).

5. The pipeline construction method according to claim 3, characterized in that, The support structure includes a plurality of support members (9) connected sequentially along the length of the trench, and adjacent support members (9) along the length of the trench are connected by plug-in connection.

6. The pipeline construction method according to claim 5, characterized in that, The support member (9) includes two support plates (10) arranged in parallel and spaced apart, and a support member (39) supported between the two support plates (10); The support plate (10) is provided with a flow channel (11), and the outer wall of the support plate (10) is provided with a slurry outlet hole (12) that communicates with the flow channel (11).

7. The pipeline construction method according to claim 6, characterized in that, The front end of the support plate (10) is provided with a vertical insert (13), and the rear end of the support plate (10) has a vertical slot (14) that mates with the vertical insert (13). A sealing element (15) is provided between the vertical insert (13) and the vertical slot (14).

8. The pipeline construction method according to claim 1, characterized in that, The discharge assembly (1) includes: The discharge hopper (16) has an inlet (17) and an outlet (18) facing the bottom of the trench; A discharge device (19) is provided at the discharge port (18).

9. The pipeline construction method according to claim 1, characterized in that, The compaction component (2) includes: A compaction frame (20) is disposed on the discharge assembly (1); The compaction element (21) is connected to the compaction frame (20) and compacts the cushion material.

10. The pipeline construction method according to claim 1, characterized in that, A first leveling component (22) is provided between the discharge component (1) and the compaction component (2); a second leveling component (23) is provided behind the compaction component (2) along the laying direction of the subbase.

11. The pipeline construction method according to claim 1, characterized in that, A feeder is provided above the trench. The outlet of the feeder is connected to the discharge assembly (1) of the subgrade laying machine through a feed pipe (24). The feeder feeds the subgrade material into the discharge assembly (1) through the feed pipe (24). The discharge assembly (1) sends the subgrade material into the bottom of the trench during the movement process. The compaction assembly (2) compacts the subgrade material at the bottom of the trench.

12. The pipeline construction method according to claim 11, characterized in that, The feeder includes: The feeding box (25) has an inlet (26) and an outlet (27), the outlet (27) being connected to the discharge assembly (1) via a feeding pipe (24); A first conveying member (28) is disposed in the feeding box (25), and the first conveying member (28) is used to convey the padding material in the feeding box (25) to the outlet (27); A second conveying member (29) is disposed in the feeding box (25). The second conveying member (29) is used to convey the padding material at the inlet (26) to the feeding box (25). The feeding drive (30) is connected to the first conveyor (28) and the second conveyor (29).

13. The pipeline construction method according to claim 12, characterized in that, The feeding pipe (24) is a flexible tube structure. A spiral conveyor (31) is provided inside the feeding pipe (24). One end of the spiral conveyor (31) is connected to the output end of the first conveyor (28). The first conveyor (28) drives the spiral conveyor (31) to rotate so as to convey the padding material in the feeding pipe (24).

14. The pipeline construction method according to claim 12, characterized in that, The feeding tube (24) has multiple sets, and the multiple sets of feeding tubes (24) are detachably connected.

15. The pipeline construction method according to any one of claims 1-14, characterized in that, A jacking well (32) is provided at one end of the trench, and a reaction wall (33) is provided in the jacking well (32). The reaction wall (33) is used to install the pipe jacking mechanism (3).

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