Linear combination of variable wedge orifice sections

Abstract

The application discloses a linear combination shield construction method of a variable wedge-shaped pipe joint, and belongs to the technical field of urban pipeline construction, and comprises the following steps: according to construction requirements and a design curve, the wedge-shaped amount of a required pipe joint is calculated and determined; the wedge-shaped amount of the variable wedge-shaped pipe joint is adjusted through a screw rod adjusting device, so that the pipe joint meets the design curve requirements; the pipe joint with the adjusted wedge-shaped amount is jacked into the ground through a wellhead jacking system of a shield machine; in the pipe joint jacking operation, the shield machine is used as a main propelling device, and the wellhead jacking system is used in cooperation, so that the pipe joint can strictly follow a pre-planned linear combination path and accurately advance. The application can adapt to the construction requirements of complex linear combination such as straight line-curve-straight line and curve-straight line-curve, and the flexibility and adaptability of construction are improved.

Description

Technical Field

[0001] This invention relates to the field of urban pipeline construction technology, specifically to a linear combination top shield construction method using variable wedge-shaped pipe sections. Background Technology

[0002] With the acceleration of urbanization, the demand for urban underground pipeline systems is increasing. However, due to the complex and varied urban terrain, pipeline construction often faces challenges of various linear combinations, such as curves, bends, and diameter changes. Traditional pipeline construction methods, such as open-cut methods and tunnel boring machines, can meet construction requirements to a certain extent, but they have obvious limitations and shortcomings when dealing with these complex linear conditions.

[0003] Traditional pipeline construction methods typically rely on fixed pipe section shapes and sizes, making them difficult to adapt to varying construction routes. When traversing curves or making bends, it is often necessary to splice multiple pipe sections or use special connectors, which not only increases construction difficulty and cost but may also affect the sealing and stability of the pipeline system. Therefore, developing a new pipeline construction method that can adapt to complex linear combinations and improve construction efficiency and quality has become an urgent need in the industry. Summary of the Invention

[0004] This invention provides a linear combination top shield construction method for variable wedge-shaped pipe sections to solve the technical problem that traditional pipeline construction methods rely on fixed pipe section shapes and are difficult to adapt to construction of curved or bent sections.

[0005] According to one aspect of the present invention, a method for linear combination shield construction of variable wedge-shaped pipe sections is provided, comprising the following steps: calculating and determining the required wedge amount of the pipe section according to construction requirements and design curves; adjusting the wedge amount of the variable wedge-shaped pipe section using a screw adjustment device to ensure that the pipe section meets the wedge amount design requirements; jacking the adjusted wedge-shaped pipe section into the ground using the wellhead jacking system of the shield machine; during the jacking process of the shield machine, ensuring that the pipe section advances according to the predetermined linear combination requirements through the tail jacking system of the shield machine; repeating the steps of adjusting the wedge amount of the variable wedge-shaped pipe section and jacking the adjusted wedge-shaped pipe section into the ground until the entire shield construction is completed.

[0006] Optionally, before the step of adjusting the wedge amount of the variable wedge amount pipe section by means of the screw adjusting device, the following step is also included: installing the screw adjusting device at the corresponding position of the pipe section, the screw adjusting device including a support for mounting on the end face of the pipe section, the support being threadedly connected to an adjusting screw arranged along the axial direction of the pipe section, and a nut being provided at the end of the adjusting screw away from the support.

[0007] Optionally, the support seat includes a support plate, a support block, and anchoring steel bars. The support plate is disposed on the end face of the pipe section, the support block is connected and fixed to the outer side of the support plate, the anchoring steel bars are disposed inside the pipe section and connected and fixed to the inner side of the support plate, and the adjusting screw is threadedly engaged with the support block.

[0008] Optionally, adjusting the wedge amount of the variable wedge pipe section via the screw adjustment device includes the following steps: rotating the adjustment screw to change the length of the screw extension; the length of the screw extension is determined according to the design curve fitting; by making the extension length of the adjustment screws of different screw adjustment devices on the pipe section different, the purpose of adjusting the wedge amount of the pipe section is achieved, thereby realizing curve construction.

[0009] Optionally, the wellhead jacking system includes a backrest, a thrust cylinder, and a top iron. The backrest is fixedly installed inside the construction well, the thrust cylinder is located between the backrest and the top iron, and the top iron is used to contact the installed pipe section to transfer the thrust of the thrust cylinder to the pipe section.

[0010] Optionally, the tail jacking system includes a pipe jacking main unit, a steel transition section, and a pipeline relay room. The steel transition section is connected to the pipe jacking main unit and the pipeline relay room. The pipeline relay room is used to transfer the thrust of the pipe jacking main unit to the pipe section and provide additional thrust during the pipe jacking process.

[0011] Optionally, the main pipe jacking unit includes a front section and a rear section connected by a ball joint. The included angle between the front and rear sections of the main pipe jacking unit is adjusted by adjusting the hinge stroke, so that the included angle between the front and rear sections of the main pipe jacking unit matches the design curve of the shield machine.

[0012] Optionally, after the top shield construction is completed, the following steps are also included: welding and fixing the adjusting screw, and sealing the joint with cement mixed with adhesive.

[0013] Optionally, the backrest is made of steel, and the construction well opening for installing the backrest is supported by a wall made of sheet piles or I-beams.

[0014] Optionally, a flexible pad is provided at the contact area between the top iron and the pipe section.

[0015] In summary, this application includes at least one of the following beneficial technical effects:

[0016] 1. By adjusting the wedge size of the variable wedge pipe section, it is possible to adapt to the construction requirements of different linear combinations without relying on pipe sections with specific shapes and angles, thus improving the flexibility and adaptability of construction.

[0017] 2. By using the wellhead jacking system and the tail jacking system of the shield tunneling machine in conjunction with each other, precise and efficient jacking operations can be achieved, improving construction efficiency and quality;

[0018] 3. Through precise pipe section adjustment and the coordination of the jacking system, disturbance and damage to the surrounding soil can be reduced, which is beneficial to protecting the underground ecological environment. At the same time, by reducing the emission of pollutants such as noise and dust during construction, it also conforms to the green and environmentally friendly concepts of modern urban construction.

[0019] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0021] Figure 1 This is a schematic diagram of the pipe section and screw adjustment device of the present invention;

[0022] Figure 2 This is a schematic diagram of the installation of the straight pipe section of the present invention;

[0023] Figure 3 This is a schematic diagram of the left-turn installation of the pipe section of the present invention;

[0024] Figure 4 This is a schematic diagram of the right-turn installation of the pipe section of the present invention;

[0025] Figure 5 This is a schematic diagram of the shield machine system of the present invention;

[0026] Figure 6 This is a schematic diagram of the shield machine system of the present invention when turning.

[0027] Legend:

[0028] 1. Pipe section; 101. F-type water-stop socket steel ring; 102. Reserved hole; 103. Support steel plate; 104. F-type water-stop spigot steel ring; 105. Water-stop strip; 106. Anchoring steel bar; 107. Support plate; 108. Support block; 109. Nut; 110. Screw; 2. Backrest; 3. Push cylinder; 4. Top iron; 5. Pipe relay room; 501. Adjustable wedge-shaped pipe section screw adjustment device; 502. Grouting hole; 503. Push cylinder; 501. Screw adjustment device; 6. Pipe jacking main unit; 601. Ball joint; 602. Segment capping block; 7. Steel transition joint. Detailed Implementation

[0029] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0030] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0031] This application discloses a linear combination top shield construction method using variable wedge-shaped tube sections, comprising the following steps:

[0032] S100, calculate and determine the required wedge amount of pipe section 1 according to construction requirements and design curves.

[0033] S200, the wedge amount of the variable wedge amount pipe section 1 is adjusted by the screw 110 adjustment device so that the pipe section 1 meets the wedge amount design requirements.

[0034] S300 uses the shaft jacking system of the shield machine to push the adjusted wedge-shaped pipe section 1 underground.

[0035] S400, during the process of using the shield machine to jack up pipe section 1, the tail jacking system of the shield machine is used to ensure that pipe section 1 advances in accordance with the predetermined linear combination requirements.

[0036] S500, repeat the steps of adjusting the wedge amount of the variable wedge pipe section (1) and pushing the adjusted wedge pipe section 1 into the ground until the entire shield construction is completed.

[0037] The main function of step S100 is to ensure that the pipeline is laid precisely according to the design route during construction. By calculating the wedge amount, it can be ensured that the angle and position of each pipe section 1 meet the requirements of the design curve, thereby achieving precise construction. Pre-calculating the wedge amount can reduce adjustment time during construction and improve overall construction efficiency; determining the wedge amount in advance helps to reduce errors during construction and ensure construction quality.

[0038] The specific implementation process of step S100 includes the following steps:

[0039] S110: Obtain design data, construction requirements, and design curve data, including pipeline route, bending radius, diameter, length, etc.; obtain detailed data on geological conditions and construction site.

[0040] S120, Calculate the design curve, use CAD software or other design tools to draw the actual path and curve of the pipeline according to the design drawings; determine the specific position of pipe section 1 in the curve and the required angle adjustment;

[0041] S130, Determine the wedge amount: Based on the curvature of the curve and the length of pipe section 1, calculate the wedge amount required for each pipe section 1. The formula is generally based on geometric principles and involves parameters such as arc length, radius, and chord length. Assuming the length of pipe section 1 is L and the curve radius is R, the wedge amount Δθ can be calculated using the following formula: Δθ=L / R. If the curve changes unevenly, segmented calculation is required to ensure that each segment of pipe section 1 can accurately adapt to the curve.

[0042] S140, Verification Calculation: Verify the calculation results to ensure that the wedge amount of each pipe section 1 meets the design requirements, simulate the jacking process, and ensure that the pipe section 1 advances according to the predetermined curve.

[0043] Before adjusting the wedge amount of the variable wedge-shaped pipe section 1 using the screw 110 adjusting device, the following steps are also included: installing the screw 110 adjusting device at the corresponding position on the pipe section 1. The screw 110 adjusting device includes a support seat for mounting on the end face of the pipe section 1. The support seat is threadedly connected to an adjusting screw 110 arranged axially along the pipe section 1. A nut 109 is provided at the end of the adjusting screw 110 away from the support seat. The purpose of installing the screw 110 adjusting device is to achieve precise adjustment, improve construction flexibility, ensure construction quality, and simplify the adjustment process.

[0044] The specific steps for installing the adjusting screw 110 at the corresponding position of pipe section 1 are as follows: First, prepare the adjusting screw 110, support seat, nut 109, and other necessary installation tools and materials, and check the end face of pipe section 1 to ensure it is clean and undamaged for the installation of the support seat. Next, fix the support seat to the end face of pipe section 1. The support seat generally includes a support plate 107, a support block 108, and an anchoring steel bar 106. The support plate 107 directly contacts the end face of pipe section 1 to ensure a firm connection, usually using welding or bolt fixing. Next, install the nut 109 on the end of the adjusting screw 110 away from the support seat. The nut 109 is used to lock the position of the screw 110 and prevent the screw 110 from rotating or loosening during adjustment. Tighten the nut 109 using tools such as an open-end wrench, hydraulic wrench, or electric wrench to ensure it is fixed. Subsequently, according to the requirements of the design curve, the extension length of the adjusting screw 110 is changed by rotating it. During the adjustment process, the change in wedge shape is monitored in real time to ensure it meets the design requirements. The extension length of the adjusting screw 110 is determined by fitting the design curve. Finally, after adjustment, preliminary verification is performed to ensure that the adjusted wedge shape meets the design requirements. If necessary, calibration is performed, and the extension length of the screw 110 is further fine-tuned to achieve the best effect. By installing the adjusting device of screw 110 and making corresponding adjustments before construction, precise wedge shape adjustment of pipe section 1 can be achieved. This not only improves the flexibility and efficiency of construction but also ensures construction quality and adapts to the needs of complex linear combination construction.

[0045] Reference Figure 1The support base includes a support plate 107, a support block 108, and anchoring steel bars 106. The support plate 107 is disposed on the end face of the pipe section 1. The support block 108 is connected and fixed to the outer side of the support plate 107. The anchoring steel bars 106 are disposed inside the pipe section 1 and connected and fixed to the inner side of the support plate 107. The adjusting screw 110 is threadedly engaged with the support block 108. The design of the support base, including the support plate 107, support block 108, and anchoring steel bars 106, aims to provide a stable and adjustable platform to ensure that the adjusting device of the screw 110 can accurately adjust the wedge shape of the pipe section 1 to adapt to complex construction requirements. The specific function and implementation process are as follows:

[0046] The main function of the support is to provide a stable support structure so that the angle and shape of pipe section 1 can be precisely adjusted during construction. Support plate 107 is set on the end face of pipe section 1, serving as a basic support and providing a solid foundation for the entire adjustment device. Support block 108 is fixed to the outside of support plate 107, forming an integral unit with it, providing a connection and adjustment platform for screw 110. Anchor steel bars 106 are set inside pipe section 1 and connected and fixed to the inside of support plate 107. This design not only increases the strength and stability of the support but also ensures that pipe section 1 and the support structure will not shift or deform during adjustment, thus maintaining the accuracy of the adjustment.

[0047] In the specific implementation process, firstly, the support plate 107 is installed on the end face of the pipe section 1, and its connection is ensured by welding or bolting. Next, the support block 108 is fixed to the outside of the support plate 107. The support block 108 is usually fixed by bolts or welding to ensure that its connection with the support plate 107 is tight and stable. Then, the anchoring steel bar 106 is installed inside the pipe section 1 and fixed to the inside of the support plate 107, usually by welding, to ensure that the steel bar can provide sufficient support and stability. The adjusting screw 110 is fixed to the support block 108 by a threaded connection. The adjusting screw 110 is set along the axial direction of the pipe section 1 and can rotate at the threaded connection. A nut 109 is installed on the other end of the adjusting screw 110. The nut 109 is used to lock the position of the screw 110 and prevent the screw 110 from rotating or loosening on its own during the adjustment process.

[0048] Adjusting the wedge shape of the variable wedge pipe section 1 using the screw 110 adjustment device includes the following steps: rotating the adjustment screw 110 to change the extension length of the screw 110; the extension length of the adjustment screw 110 is determined according to the design curve fitting; by making the extension length of the adjustment screw 110 of different screw 110 adjustment devices on the pipe section 1 different, the purpose of adjusting the wedge shape of the pipe section 1 is achieved, thereby realizing curve construction.

[0049] The specific implementation steps of this process are as follows: First, according to the requirements of the construction design curve, the required wedge amount for each pipe section 1 is calculated. This wedge amount determines the required extension length of the screw 110. Specifically, the screw 110 adjustment devices at different positions will have different extension lengths to make the entire pipe section 1 form the required wedge angle, thereby accurately following the design curve. Next, actual adjustment is performed. By rotating the adjustment screw 110, the extension length of the screw 110 can be changed. The extension length of the adjustment screw 110 is determined by fitting the previously calculated design curve. Through the threaded connection, the adjustment screw 110 can rotate within the support block 108, thereby gradually extending or retracting to change its length. There may be multiple screw 110 adjustment devices on each pipe section 1, and the position and number of these devices are determined according to the size of the pipe section 1 and the required adjustment accuracy. By adjusting these screws 110 one by one, it is ensured that the extension length of the screw 110 at each adjustment point is different, thereby adjusting the wedge amount of the entire pipe section 1. The specific operating steps are as follows: Preparation and Inspection: Ensure all adjusting screws 110, support seats, and related tools are ready, and check that the screw 110 adjusting device is working properly. Preliminary Adjustment: Based on design calculations, rotate each adjusting screw 110 to initially set the extension length of the screw 110. Use tools such as open-end wrenches, hydraulic wrenches, or electric wrenches for rotation. Precise Adjustment: Perform precise adjustment by measuring the extension length of each adjusting screw 110 to ensure it conforms to design requirements. This process may require repeated measurements and adjustments to ensure that the extension length of all screws 110 reaches the predetermined value. Fixing and Locking: After adjusting to the appropriate length, use nuts 109 to lock the screws 110 to prevent loosening or positional changes during jacking. Ensure that all nuts 109 are tightened and securely fixed. Verification and Calibration: After adjustment, perform preliminary verification by measuring the angle and position of pipe section 1 to ensure it meets the requirements of the design curve. If necessary, further fine-tune the extension length of the screws 110 until optimal conditions are achieved. Record the final extension length and corresponding position of each adjusting screw 110 for inspection and adjustment during construction. Through the above steps, the screw 110 adjusting device can precisely adjust the wedge shape of pipe section 1 to adapt to the complex curve construction requirements, ensuring that pipe section 1 can be laid smoothly according to the design curve. This not only improves the accuracy and quality of construction, but also enhances the flexibility and adaptability of construction, reduces possible errors during construction, and ensures the stability and sealing of the entire pipeline system.

[0050] Reference Figure 1In one specific embodiment, the end of the last pipe section 1 is provided with an F-type water-stop socket steel ring 101. Each pipe section 1 has a reserved hole 102 at its end for cooperating with the screw 110 adjustment device. A support steel plate 103 is provided at the bottom of the reserved hole 102. An F-type water-stop socket steel ring 104 and a water-stop strip 105 are provided at the end of the pipe section 1 near the screw 110 adjustment device.

[0051] Reference Figure 2 , Figure 3 and Figure 4 When installing the straight section pipe section 1, the extension lengths of the screws 110 of the two sets of screw 110 adjustment devices on pipe section 1 are the same. When it is necessary to turn to the left, the extension length of the right screw 110 on pipe section 1 is greater than the extension length of the left screw 110; when it is necessary to turn to the right, the extension length of the left screw 110 on pipe section 1 is greater than the extension length of the right screw 110.

[0052] Reference Figure 5 and Figure 6The wellhead jacking system includes a backrest 2, a thrust cylinder 3, and a top plate 4. The backrest 2 is fixedly installed inside the construction well. The thrust cylinder 3 is located between the backrest 2 and the top plate 4. The top plate 4 is used to contact the installed pipe section 1, transferring the thrust of the thrust cylinder 3 to the pipe section 1. The main function of the wellhead jacking system is to provide stable and continuous thrust to accurately push the pipe section 1 underground, ensuring smooth construction. The specific implementation process is as follows: The backrest 2 is fixedly installed inside the construction well, providing a robust reaction support to counteract the reaction force of the thrust cylinder 3, ensuring the stability of the entire jacking system under thrust. The thrust cylinder 3, installed between the backrest 2 and the top plate 4, is the power source of the entire system, providing thrust through hydraulic or mechanical action. The top plate 4 is connected to the front end of the thrust cylinder 3, contacting the installed pipe section 1, and evenly transferring the thrust generated by the thrust cylinder 3 to the pipe section 1, thereby pushing the pipe section 1 forward. The specific operating steps are as follows: First, install the backrest 2 inside the construction well, ensuring it is firmly fixed to the well wall to withstand the enormous reaction force generated during the jacking process. This is typically achieved using concrete or steel structures for fixation. Then, install the thrust cylinder 3 between the backrest 2 and the jacking iron 4, ensuring the cylinder can operate stably under the support of the backrest 2. Connect the cylinder to the hydraulic pump via a hydraulic connection to ensure the normal operation of the hydraulic system. Next, install the jacking iron 4 at the front end of the thrust cylinder 3, ensuring close contact with the rear end of the already laid pipe section 1 to ensure effective thrust transmission. During the actual jacking process, the operator starts the hydraulic pump, controlling the flow of hydraulic oil to drive the thrust cylinder 3, generating thrust. The thrust cylinder 3 pushes the jacking iron 4, which then evenly transmits the thrust to the pipe section 1, propelling it forward. Throughout the process, the operating status of the jacking system needs to be monitored in real time to ensure uniform and stable thrust, preventing uneven stress on the pipe section 1 that could lead to deformation or damage. After each advance, the machine is stopped and the connection between the thrust cylinder 3 and the jacking iron 4 is checked to ensure there is no loosening or damage before continuing the next round of advance. Through the above steps, the wellhead jacking system can continuously provide stable thrust, ensuring that the pipe section 1 advances precisely along the designed route, improving the accuracy and efficiency of construction, while reducing the risks and errors in the construction process.

[0053] The backrest 2 is made of steel, and the opening of the construction well for installing the backrest 2 is supported by a wall formed by sheet piles or I-beams. This design and construction method serves several purposes: First, it provides robust support. The steel backrest 2 has high strength and durability, capable of withstanding the enormous reaction forces generated during jacking, ensuring that the backrest 2 will not deform or shift when the propulsion cylinder 3 applies thrust, thus maintaining system stability. Second, it ensures structural stability. The use of sheet piles or I-beams to form a wall at the construction well opening further enhances its stability. Sheet piles and I-beams effectively resist soil pressure and various forces generated during construction, preventing the well opening from collapsing or deforming, and ensuring construction safety.

[0054] The tail-end jacking system includes a pipe jacking main unit 6, a steel transition section 7, and a pipeline relay station 5. The steel transition section 7 connects to the pipe jacking main unit 6 and the pipeline relay station 5. The pipeline relay station 5 is used to transfer the thrust of the pipe jacking main unit 6 to pipe section 1 and provide additional thrust during pipe jacking. First, the pipe jacking main unit 6 provides the main jacking thrust, ensuring that the entire pipeline system can advance along the predetermined route. The pipe jacking main unit 6 is the power source of the entire system, capable of generating strong thrust to propel pipe section 1 forward. Second, the steel transition section 7 plays a connecting and transmission role. The steel transition section 7 evenly transmits the thrust of the pipe jacking main unit 6 to the pipeline relay station 5, and further to pipe section 1, ensuring that the thrust is not lost or deformed during transmission. The design of the pipeline relay station 5 is crucial. It not only transmits the thrust of the pipe jacking main unit 6 to pipe section 1, but also provides additional thrust during advancement, ensuring that pipe section 1 can advance stably and continuously. Especially in long-distance or complex terrain construction, the relay station can overcome the problem of insufficient thrust through additional thrust compensation. The pipeline relay station 5 is equipped with an adjustable wedge-shaped pipe section 1 screw 110 adjustment device, a grouting hole 502, and a propulsion cylinder 503. Furthermore, the pipeline relay station 5 provides a buffering effect during the jacking process, reducing the impact and vibration on pipe section 1 during thrust transmission, protecting pipe section 1 and connecting components, and extending their service life. During actual construction, the pipe jacking main unit 6 generates thrust through a hydraulic system. This thrust is transmitted to the pipeline relay station 5 through a steel transition joint 7, and the pipeline relay station 5 then evenly distributes the thrust onto pipe section 1, while providing necessary additional thrust to ensure stable advancement of pipe section 1. The entire system monitors the thrust transmission in real time, ensuring uniform and stable thrust transmission at each stage. Through this multi-level, multi-node thrust transmission system, the tail jacking system can maintain efficient operation under various complex construction conditions, improving construction quality and safety, and ensuring the smooth completion of pipeline construction as planned.

[0055] The pipe jacking unit 6 comprises a front section and a rear section connected by a ball joint 601. The angle between the front and rear sections of the pipe jacking unit 6 is adjusted by changing the hinge stroke, ensuring that the angle matches the design curve of the shield machine. The rear section of the pipe jacking unit 6 is equipped with a segment capping block 602. The ball joint 601 allows the front and rear sections of the pipe jacking unit 6 to rotate flexibly, enabling it to adapt to different curves and turning angles in complex construction environments. Adjusting the hinge stroke precisely controls the angle between the front and rear sections, ensuring that the front end of the pipe jacking unit 6 accurately matches the design curve of the shield machine, thus ensuring the pipeline advances along the predetermined path and avoiding construction errors caused by path deviations. This design allows the pipe jacking unit 6 to better adapt to various complex terrains and construction conditions, such as curved sections and slope variations, improving the accuracy and reliability of pipe jacking construction. Simultaneously, the flexible hinge design reduces thrust loss during transmission, maintaining thrust effectiveness and ensuring smooth pipeline advancement. Flexible padding is installed at the contact point between the top iron 4 and the pipe section 1. The main function of the flexible padding at the contact point between the top iron 4 and the pipe section 1 is to reduce and disperse the thrust impact, protect the pipe section 1 and its connection parts, and improve the safety and efficiency of the overall construction.

[0056] After the top shield construction is completed, the following steps are included: welding and fixing the adjusting screw 110, and sealing the joint with cement mixed with adhesive. The main purpose is to ensure the stability and sealing of pipe section 1 in the later stages of construction, preventing the adjusting screw 110 from loosening due to vibration or external forces during use, thus affecting the structural integrity and sealing effect of the entire pipeline system. Specifically, the adjusting screw 110 is first fixed to its final adjustment position by welding. The welding process must ensure that the weld points are firm and fully covered to prevent any possible loosening or displacement. Then, the connection between the screw 110 and pipe section 1 is sealed with cement mixed with adhesive. The cement not only fills the gaps and prevents water, mud, and other impurities from entering, but also provides a certain degree of flexibility and buffering, absorbing minor vibrations and displacements, thereby further improving the sealing effect and structural stability. Throughout the process, it is necessary to ensure that the caulking material is evenly distributed and tightly adheres to the surrounding surface of pipe section 1. Finally, necessary curing and inspection are carried out to ensure that the quality of welding and caulking meets the expected standards, thus providing a reliable guarantee for the long-term operation of the pipeline system.

[0057] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A linear combination top shield construction method for variable wedge-shaped tube sections, characterized in that, Includes the following steps: Calculate and determine the required wedge shape of pipe section (1) based on construction requirements and design curves; The wedge amount of the variable wedge tube section (1) is adjusted by the screw (110) adjustment device so that the tube section (1) meets the wedge amount design requirements; The pipe section (1) with the adjusted wedge shape is pushed into the ground through the wellhead jacking system of the shield machine; During the process of using the shield machine to jack the pipe section (1), the tail jacking system of the shield machine is used to ensure that the pipe section (1) advances in accordance with the predetermined linear combination requirements. Repeat the steps of adjusting the wedge amount of the variable wedge pipe section (1) and pushing the adjusted wedge pipe section (1) into the ground until the entire shield construction is completed; The adjustment of the wedge amount of the variable wedge pipe section (1) by adjusting the screw (110) includes the following steps: rotating the adjusting screw (110) to change the extension length of the screw (110). The extension length of the adjusting screw (110) is determined according to the design curve fitting. By making the extension length of the adjusting screw (110) of different screw (110) adjusting devices on the pipe section (1) different, the purpose of adjusting the wedge amount of the pipe section (1) is achieved, thereby realizing the curve construction.

2. The linear combination top shield construction method of variable wedge-shaped tube sections according to claim 1, characterized in that: Before the step of adjusting the wedge amount of the variable wedge tube section (1) via the screw (110) adjusting device, the following steps are also included: A screw (110) adjustment device is installed at the corresponding position of the pipe section (1). The screw (110) adjustment device includes a support seat for installation on the end face of the pipe section (1). The support seat is threadedly connected to an adjustment screw (110) arranged along the axial direction of the pipe section (1). A nut (109) is provided on the end of the adjustment screw (110) away from the support seat.

3. The linear combination top shield construction method of variable wedge-shaped tube sections according to claim 2, characterized in that: The support base includes a support plate (107), a support block (108), and an anchoring steel bar (106). The support plate (107) is disposed on the end face of the pipe section (1). The support block (108) is connected and fixed to the outside of the support plate (107). The anchoring steel bar (106) is disposed inside the pipe section (1) and connected and fixed to the inside of the support plate (107). The adjusting screw (110) is threadedly engaged with the support block (108).

4. The linear combination top shield construction method of variable wedge-shaped tube sections according to claim 1, characterized in that: The wellhead jacking system includes a backrest (2), a thrust cylinder (3), and a top iron (4). The backrest (2) is fixedly installed inside the construction well. The thrust cylinder (3) is located between the backrest (2) and the top iron (4). The top iron (4) is used to contact the installed pipe section (1) and transmit the thrust of the thrust cylinder (3) to the pipe section (1).

5. The linear combination top shield construction method of variable wedge-shaped tube sections according to claim 4, characterized in that: The tail jacking system includes a jacking host (6), a steel transition section (7), and a pipeline relay room (5). The steel transition section (7) is connected to the jacking host (6) and the pipeline relay room (5). The pipeline relay room (5) is used to transfer the thrust of the jacking host (6) to the pipe section (1) and provide additional thrust during the jacking process.

6. The linear combination top shield construction method of variable wedge-shaped tube sections according to claim 5, characterized in that: The pipe jacking host (6) includes a front section and a rear section connected by a ball joint (601). The included angle between the front section and the rear section of the pipe jacking host (6) is adjusted by adjusting the hinge stroke so that the included angle between the front section and the rear section of the pipe jacking host (6) matches the design curve of the shield machine fitting.

7. The linear combination top shield construction method of variable wedge-shaped tube sections according to claim 1, characterized in that: After the top shield construction is completed, the following steps are also included: The adjusting screw (110) is welded and fixed, and the joint is sealed with cement mixed with adhesive.

8. The linear combination top shield construction method of variable wedge-shaped tube sections according to claim 4, characterized in that: The backrest (2) is made of steel, and the construction well opening for installing the backrest (2) is supported by a wall made of sheet piles or I-beams.

9. The linear combination top shield construction method of variable wedge-shaped tube sections according to claim 4, characterized in that: Flexible padding is provided at the contact area between the top iron (4) and the pipe section (1).

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