Long-distance water diversion pressure pipeline butt joint method

Abstract

The invention discloses a long-distance water diversion pressure pipeline butt joint method, which belongs to the technical field of pressure pipeline butt joint construction, and comprises the following steps: step 1, hoisting a to-be-mounted pipeline to a specified mounting position, adjusting the posture of the to-be-mounted pipeline, and preliminarily aligning the axis of the to-be-mounted pipeline with the axis of a mounted pipeline; the inserting end of the to-be-mounted pipeline is aligned with the bearing end of the mounted pipeline; secondly, the preliminarily aligned pipeline to be installed is placed on an external adjusting mechanism, and the plane position and the elevation of the pipeline to be installed are adjusted till the axis deviation of the pipeline to be installed and the axis deviation of the installed pipeline are both controlled within a preset value; and thirdly, the force application mechanism applies jacking force to the insertion end of the to-be-installed pipeline from the non-butt-joint end of the to-be-installed pipeline, and the insertion end of the to-be-installed pipeline is pushed to the bearing end of the installed pipeline till socket and spigot are completed. The method can effectively solve the problems that the deviation is difficult to correct and the precision is difficult to guarantee in the butt joint of large-diameter pipelines in a traditional method.

Description

Technical Field

[0001] This invention relates to the field of pressure pipeline connection construction technology, specifically to a method for connecting long-distance water diversion pressure pipelines. Background Technology

[0002] With the development of engineering construction in my country, in the fields of energy, water conservancy and other infrastructure construction, the transmission distance of water diversion pipelines is constantly extended, the pipe diameter is continuously increased, the working pressure is gradually increased, and the construction environment often involves complex terrain and other engineering scenarios, which puts forward more stringent requirements for the precision control of pipeline connection.

[0003] Traditional water diversion pressure pipeline connection construction generally relies on manual measurement and positioning, and rough mechanical adjustments, which presents numerous problems, especially in the construction of large-diameter pipelines. For example, in the measurement stage, the measurement accuracy of traditional leveling rods and ordinary theodolites is limited, and data acquisition has a lag of 5-10 minutes, making it difficult to capture the dynamic changes of the three-dimensional coordinates of the pipe opening in real time during the connection of large-diameter pipelines. This results in untimely detection of deviations and inaccurate adjustment directions.

[0004] Furthermore, traditional pipeline connection processes lack systematic digital management tools. Measurement data, parameter adjustments, and construction status information cannot be effectively integrated, making it difficult to achieve traceability and closed-loop control throughout the entire large-diameter pipeline connection process. This leads to high rework rates, project delays, and, in the long term, insufficient connection accuracy can cause pipeline stress concentration, joint leakage, and other malfunctions, potentially even resulting in pipeline rupture and water waste. Therefore, there is an urgent need to develop a modern pipeline connection solution that integrates high-precision measurement and control technology with a refined connection process adapted to large-diameter pipelines, specifically addressing the problems of difficult deviation correction and accuracy assurance in traditional methods for large-diameter pipeline connection. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides a method for connecting long-distance water diversion pressure pipelines, aiming to solve the problems of difficulty in correcting deviations and ensuring accuracy in connecting large-diameter pipelines using traditional methods. To achieve the above objectives, this invention provides the following technical solution: A method for connecting long-distance water diversion pressure pipelines includes the following steps: Step 1: Hoist the pipe to be installed to the designated installation position, adjust the posture of the pipe to be installed so that the axis of the pipe to be installed is initially aligned with the axis of the installed pipe, and the plug end of the pipe to be installed is aligned with the socket end of the installed pipe. Step 2: Place the initially aligned pipe to be installed on the external adjustment mechanism and adjust the planar position and elevation of the pipe to be installed until the axial deviation between the pipe to be installed and the installed pipe is controlled within the preset value. Step 3: The force-applying mechanism applies a jacking force from the non-connecting end of the pipe to be installed to the insertion end of the pipe to be installed, pushing the insertion end of the pipe to be installed toward the receiving end of the installed pipe until the insertion is completed.

[0006] Furthermore, in step one, adjusting the posture of the pipe to be installed includes: setting up a laser emitter inside the installed pipe, setting a laser target at the end of the pipe to be installed, adjusting the laser emitter so that the laser beam forms a visible reference line along the axis of the installed pipe; when adjusting the posture of the pipe to be installed, using the position of the laser spot on the laser target as a reference, so that the axis of the pipe to be installed is initially aligned with the laser reference line.

[0007] Furthermore, in step two, the external adjustment mechanism includes an adjustment bracket and an adjustment component, the adjustment component being used to adjust the planar position and elevation of the pipe to be installed placed on the adjustment bracket.

[0008] Furthermore, the adjustment component is a hydraulic jack.

[0009] Furthermore, in step two, adjusting the planar position and elevation of the pipe to be installed includes: measuring the coordinates of characteristic points of the plug end of the pipe to be installed and the receiving end of the installed pipe in real time using a measuring instrument, and controlling the horizontal extension and elevation extension of the adjustment component according to the measurement data, until the axial deviation of the pipe to be installed and the installed pipe are both controlled within the preset value.

[0010] Furthermore, the measuring instrument is a total station.

[0011] Furthermore, the preset value is ±5mm.

[0012] Furthermore, before step one, there is a pipe section status verification step, which includes: checking the actual size of the pipe to be installed; if it exceeds the allowable deviation range, the pipe to be installed is reshaped before step one is executed.

[0013] Furthermore, before step three, there is also a docking pretreatment step, which includes: treating the inner wall of the installed pipe receiving end and the outer wall of the pipe to be installed insertion end, and marking the insertion depth on the pipe to be installed insertion end.

[0014] Furthermore, in step three, the force-applying mechanism is a pipe-pulling machine, and the clamping assembly of the pipe-pulling machine is evenly arranged with at least three force-bearing points along the circumference of the non-connected end of the pipe to be installed; or, the force-applying mechanism is a double-sided synchronous hydraulic jack, and an arc-shaped pressure-bearing pad is provided between the force-applying end of the jack and the non-connected end of the pipe to be installed, and the curvature of the pad matches the curvature of the outer wall of the pipe.

[0015] The beneficial effects of this invention are: 1. This invention utilizes the automatic tracking and measurement function of an automated total station, eliminating the need for manual instrument setup and data reading, and enabling real-time transmission and adjustment guidance of measurement data. The application of laser collimation technology quickly assists in pipe alignment, shortening the initial positioning time. In the refined docking process, the external adjustment support combined with hydraulic jacks for fine-tuning replaces the crude operation of manual prying and repeated calibration with hoisting equipment. The stable jacking design of a dedicated pipe pulling machine or dual-sided synchronous hydraulic jacks ensures that the pipe axis remains consistent throughout the jacking process, avoiding secondary adjustments caused by the "tail-lifting" phenomenon.

[0016] 2. This invention, by constructing a multi-level high-precision measurement system, achieves real-time capture and accurate feedback of the three-dimensional coordinates of the pipe joints during the pipe connection process, enabling the pipe axis deviation to be stably controlled within ±5mm. Simultaneously, by verifying the diameter and ellipticity of the socket and spigot of each pipe section before hoisting, personalized adjustments based on the specific pipe are made, effectively avoiding potential connection problems caused by deviations in the pipe's own dimensions. Attached Figure Description

[0017] Figure 1 A flowchart of a long-distance water diversion pressure pipeline docking method provided by the present invention; Figure 2 This is a schematic diagram of the total station layout provided by the present invention; Figure 3 A schematic diagram illustrating the pipe section status adjustment provided by the present invention; Figure 4 A schematic diagram of the external adjustment mechanism provided by the present invention; The attached diagram is labeled as follows: 1. Laser emitter; 2. Adjustment bracket; 3. Adjustment assembly; 4. Total station; 5. Baseline; 6. Pipeline to be installed. Detailed Implementation

[0018] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore merely examples and should not be used to limit the scope of protection of the present invention. Those skilled in the art should understand that the present invention can be implemented even without certain specific details. In some other embodiments, methods, means, equipment, and steps well known to those skilled in the art are not described in detail in order to highlight the spirit of the present invention.

[0019] Unless otherwise specified, in this invention, terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," "x-direction," "y-direction," and "z-direction" 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 this invention and 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, the terms used to describe orientation or positional relationships in this invention are for illustrative purposes only and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the accompanying drawings and according to the specific circumstances.

[0020] Example 1 See attached Figures 1-4 This embodiment provides a method for connecting long-distance water diversion pressure pipelines, which can be applied to long-distance water diversion projects. For example, the pipeline uses a DN2000 reinforced concrete socket-type pressure pipe, and the installation environment is an open trench.

[0021] Before docking, a construction control network was established along the work area, using a high-precision total station 4 and an electronic level to ensure the accuracy of the control points themselves. The positions of total stations KZ1, KZ2, and KZ3 were set as follows: Figure 2 As shown. For example, the total station model 4 is Leica TS60, and the electronic level model is Trimble Dini 03.

[0022] Before hoisting the pipeline, a pipe section condition verification procedure must be performed. Specifically, a steel tape measure can be used to measure the actual length of the pipe to be installed (6). An inside micrometer can be used to evenly select four measuring points at three locations: the spigot end, the middle, and the non-butt end, to check the inner diameter of the pipe. An outside micrometer can be used to check the outer diameter of the spigot end. If the outer diameter of a pipe section's spigot end exceeds the allowable deviation, it can be reshaped by mechanical grinding. After grinding, it can be checked again until the dimensions meet the requirements. At the same time, the appearance of the pipeline should be checked to ensure there are no defects such as cracks or exposed reinforcement.

[0023] During hoisting, the pipe to be installed (6) is slowly hoisted to the designated installation position within the trench using hoisting equipment, ensuring the pipe axis aligns with the trench's direction. A laser emitter (1), for example a ZDL700 model with a laser range ≥100m and accuracy ±0.1mm / m, is installed inside the installed pipe, a distance from the receiving end. The laser emitter (1) is adjusted so that the laser beam forms a visible red reference line (5) along the axis of the installed pipe. A circular laser target is fixed to the inner wall of the non-connecting end of the pipe to be installed (6), with a crosshair marked on the target center. The posture of the pipe to be installed (6) is finely adjusted using the hoisting equipment, and the position of the laser spot on the target is observed. When the center of the laser spot initially coincides with the crosshair on the target center, preliminary alignment is achieved, and the insertion end of the pipe to be installed (6) is directly opposite the receiving end of the installed pipe. It is understood that existing technology can be used for the hoisting equipment.

[0024] After initial alignment, pre-treatment is performed on the pipe to be installed (6) and the already installed pipe. Specifically, the pre-treatment steps include: removing dust, debris, and loose rust from the inner walls of the plug end of the pipe to be installed (6) and the receiving end of the already installed pipe, and checking for any damage; marking the insertion depth line on the outer wall of the plug end. At the same time, check the rubber sealing ring installation groove of the receiving end to ensure it is undamaged, and after evenly applying lubricant to the compliant rubber sealing ring, accurately embed it into the installation groove.

[0025] After the pre-treatment, the pipe 6 to be installed is precisely aligned. Specifically, two sets of external adjustment mechanisms are installed below the pipe 6 in the trench. Each set of adjustment mechanisms includes an adjustment bracket 2 and an adjustment component 3. For example, the adjustment bracket 2 can be made of welded steel, and an arc-shaped support can be installed on the top of the bracket, with the arc matching the outer wall of the pipe. The support is lined with a rubber pad. The adjustment component 3 can be four hydraulic jacks, for example, two in the horizontal direction and two in the vertical direction. The surveyor uses a total station 4 to measure the coordinates of characteristic points in real time, for example, to monitor the center position and elevation of the pipe 6 to be installed and the pipe opening of the installed pipe. Based on the measurement data, the extension and retraction of the horizontal jacks are adjusted through the hydraulic control system to correct the left and right offset of the pipe 6 to be installed; the extension and retraction of the vertical jacks are adjusted to correct the vertical tilt of the pipe. The adjustments are repeated until the total station 4 shows that the axial deviation between the pipe 6 to be installed and the installed pipe is ≤±5mm, meeting the preset value requirements.

[0026] After precise alignment, the pipe to be installed (6) is smoothly jacked in. Specifically, a pipe pulling machine or dual-sided synchronous hydraulic jacks can be used as the force application mechanism. For example, a hydraulic jack of model YQ32-200 can be used. An arc-shaped pressure-bearing pad is wrapped around the outer wall of the non-butt end of the pipe to be installed (6), and a rubber buffer pad is pasted between the pad and the outer wall of the pipe. Two hydraulic jacks are symmetrically installed on steel supports on both sides of the trench, so that the force application end of the jack is directly opposite the center of the arc-shaped pressure-bearing pad, ensuring that the force application direction is consistent with the pipe axis. The hydraulic control system is started to apply the jacking force synchronously and uniformly. During the process, the position of the laser target spot is observed to ensure that the axis deviation is always within the preset range. At the same time, the rubber ring is observed through the observation hole reserved at the receiving end using an endoscope to ensure that there is no edge chipping, overturning, or other phenomena. The insertion depth mark of the insertion end of the pipe to be installed (6) is also observed. When the mark line coincides with the end face of the already installed pipe's receiving end, the force application is stopped, and the pipe insertion is completed. At this point, the final center and elevation of the pipeline can be checked again and recorded.

[0027] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications and substitutions should be covered within the scope of the claims of the present invention. Technical aspects, shapes, and structures not described in detail in this invention are all well-known technologies.

Claims

1. A method for connecting long-distance water diversion pressure pipelines, characterized in that, Includes the following steps: Step 1: Hoist the pipe to be installed to the designated installation position, adjust the posture of the pipe to be installed so that the axis of the pipe to be installed is initially aligned with the axis of the installed pipe, and the plug end of the pipe to be installed is aligned with the socket end of the installed pipe. Step 2: Place the initially aligned pipe to be installed on the external adjustment mechanism and adjust the planar position and elevation of the pipe to be installed until the axial deviation between the pipe to be installed and the installed pipe is controlled within the preset value. Step 3: The force-applying mechanism applies a jacking force from the non-connecting end of the pipe to be installed to the insertion end of the pipe to be installed, pushing the insertion end of the pipe to be installed toward the receiving end of the installed pipe until the insertion is completed.

2. The method for connecting long-distance water diversion pressure pipelines according to claim 1, characterized in that, In step one, adjusting the posture of the pipe to be installed includes: setting up a laser emitter inside the installed pipe, setting a laser target at the end of the pipe to be installed, adjusting the laser emitter so that the laser beam forms a visible reference line along the axis of the installed pipe; when adjusting the posture of the pipe to be installed, using the position of the laser spot on the laser target as a reference, so that the axis of the pipe to be installed is initially aligned with the laser reference line.

3. The method for connecting long-distance water diversion pressure pipelines according to claim 1, characterized in that, In step two, the external adjustment mechanism includes an adjustment bracket and an adjustment component. The adjustment component is used to adjust the planar position and elevation of the pipe to be installed, which is placed on the adjustment bracket.

4. The method for connecting long-distance water diversion pressure pipelines according to claim 3, characterized in that, The adjustment component is a hydraulic jack.

5. The method for connecting long-distance water diversion pressure pipelines according to claim 3, characterized in that, In step two, adjusting the planar position and elevation of the pipe to be installed includes: measuring the coordinates of characteristic points of the plug end of the pipe to be installed and the receiving end of the installed pipe in real time using a measuring instrument, and controlling the horizontal and vertical expansion and contraction of the adjustment component according to the measurement data until the axial deviation of the pipe to be installed and the installed pipe are both controlled within the preset value.

6. The method for connecting long-distance water diversion pressure pipelines according to claim 5, characterized in that, The measuring instrument is a total station.

7. The method for connecting long-distance water diversion pressure pipelines according to claim 5, characterized in that, The preset value is ±5mm.

8. The method for connecting long-distance water diversion pressure pipelines according to claim 1, characterized in that, Before step one, there is also a pipe section status verification step, which includes: checking the actual size of the pipe to be installed. If the size exceeds the allowable deviation range, the pipe to be installed is reshaped before step one is executed.

9. The method for connecting long-distance water diversion pressure pipelines according to claim 1, characterized in that, Before step three, there is also a docking pretreatment step, which includes: treating the inner wall of the installed pipe receiving end and the outer wall of the pipe to be installed insertion end, and marking the insertion depth on the pipe to be installed insertion end.

10. The method for connecting long-distance water diversion pressure pipelines according to claim 1, characterized in that, In step three, the force-applying mechanism is a pipe-pulling machine, and the clamping assembly of the pipe-pulling machine is evenly arranged with at least three force-bearing points along the circumference of the non-connected end of the pipe to be installed; or, the force-applying mechanism is a double-sided synchronous hydraulic jack, and an arc-shaped pressure-bearing pad is set between the force-applying end of the jack and the non-connected end of the pipe to be installed, and the curvature of the pad matches the curvature of the outer wall of the pipe.

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