Flexible supporting method for water distribution ring pipe

Abstract

The invention discloses a water distribution ring pipe flexible supporting method, a flexible supporting device is used, the flexible supporting device comprises a plurality of body supporting feet arranged at the bottom of a water distribution ring pipe body, supporting pieces are arranged below the body supporting feet respectively, and the supporting pieces make contact with the body supporting feet and can slide relative to the body supporting feet. A supporting bottom plate is arranged at the lower end of the supporting piece, and a tensioning assembly is further arranged between the supporting bottom plate and the body supporting feet. The method comprises the steps of segmenting according to transportation limitation, selecting supporting pieces according to weight, constructing a three-dimensional model and carrying out nonlinear finite element calculation, verifying by extracting bearing reaction and deformation, carrying out fine tuning iteration on a standard exceeding area, finally determining the area of a bottom plate, and forming a complete closed loop from pipe joint processing to load control. According to the method, empirical design is converted into accurate control based on data, the problems of large deformation difference and uneven load of all supporting positions of the large water distribution ring pipe can be solved in a targeted mode, and the blank that a traditional method lacks systematic quantification means in large unit supporting design is filled up.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of water distribution ring pipe flexible support method, belong to support tooling technical field. BACKGROUND

[0002] In the water turbine industry impulse unit, as key component, water distribution ring pipe needs to withstand high-pressure liquid action in pressure test, and the stability of its support structure directly affects the safety of experiment and equipment reliability.

[0003] In the existing impulse unit, the support of water distribution ring pipe is mostly designed with high rigidity connection: the support is rigidly fixed with the body of water distribution ring pipe to reduce deformation in the process of pressure test. It has certain applicability in the unit with small structure size: as the small water distribution ring pipe body has good rigidity, although it may cause higher local stress of each support pipe section and larger difference of load transmitted to concrete foundation by each support point, the above problems are within acceptable range due to the strong body rigidity, so it becomes the mainstream support structure form in the industry.

[0004] However, with the development of large-scale impulse unit, the structure size of water distribution ring pipe is significantly increased, and its body rigidity is greatly reduced. In this case, the limitations of traditional high-rigidity support are more prominent: due to the annular fork-shaped structure characteristics of large water distribution ring pipe, it has the tendency to stretch and straighten freely during pressure test, and the deformation amount of each support position is large and obviously different, which aggravates the problem of uneven deformation load transmitted to the support by pipe section; local high-rigidity constraint easily causes the pipe section to form uncontrollable local high-stress area, and the load transmitted to concrete foundation by some support points is far beyond the design threshold, which may cause the safety hazard that support bottom plate is pulled out of concrete foundation during pressure test, seriously threatening the safety and reliability of pressure test of large-scale impulse unit water distribution ring pipe. At present, there is no effective support design scheme for the above problems of large water distribution ring pipe. SUMMARY

[0005] The present application aims at the above-mentioned problems, and provides a kind of water distribution ring pipe flexible support method.

[0006] The technical scheme adopted by the present application is as follows: A kind of water distribution ring pipe flexible support method uses flexible support device, the flexible support device includes multiple body feet arranged at the bottom of water distribution ring pipe body, the lower side of the body foot is respectively provided with a support piece, the support piece is in contact with the body foot and can slide relatively, the lower end of the support piece is provided with a support bottom plate, and a tensioning assembly is further arranged between the support bottom plate and the body foot. The method comprises the following steps: S1, divide the water distribution ring pipe body into several pipe sections according to transportation restrictions; S2, select the size of support piece according to the weight of each pipe section; S3, a three-dimensional model of calculation with flexible support is initially constructed, a maximum pressing pressure is loaded on a surface of a pipe joint body, a fixed constraint is applied to an under surface of each support base plate, a component constraint is applied according to an actual bearing condition of the flexible support, and then a structural nonlinear finite element calculation is carried out; S4, a support reaction force at a fixed constraint of each flexible support base plate is extracted, a horizontal support reaction force and a vertical support reaction force are verified, and a maximum deformation at an outlet of a water distribution ring pipe is extracted and verified; S5, if the calculation result does not meet the requirement of S4, the support position and quantity are fine-tuned in a region exceeding the standard according to the result of S4, the step of S4 is repeated to calculate until the requirement is met; S6, a support base plate load of a final calculation model is extracted to determine the area of the base plate, so that the area meets the proportional requirement of the horizontal support reaction force and the vertical support reaction force.

[0007] Alternatively, the support member is a support jack, an upper end of the support jack is supported on the body support leg and is not welded with the body support leg and can slide relative to the body support leg, and a lower end of the support jack is welded with the support base plate.

[0008] Alternatively, a bottom of the support jack is provided with a height adjusting nut.

[0009] Alternatively, the position of the support member arranged for each pipe joint is away from the gravity center of the pipe joint and is uniformly arranged along the gravity center of the pipe joint.

[0010] Alternatively, the tensioning assembly comprises a tensioning screw rod, the tensioning screw rod is arranged outside the support member, and a pre-tightening nut located above the body support leg is arranged on the tensioning screw rod.

[0011] Alternatively, the support base plate is embedded in a concrete foundation and an upper surface thereof is exposed to a concrete surface.

[0012] Alternatively, when the specifications of the jack are selected in S2, the number of support members arranged for each pipe joint is not less than 3, and the theoretical lifting weight of the support member is not less than 3 times the weight of the pipe joint.

[0013] Alternatively, when the structural nonlinear finite element calculation is carried out in S3, the pressure loaded in the water distribution ring pipe is a strength test pressure.

[0014] Alternatively, in S4, the horizontal support reaction force Fh of each flexible support is less than 200 kN, the vertical support reaction force Fv of each flexible support is less than 500 kN, and the deformation of the outlet of the water distribution ring pipe is less than 4 mm.

[0015] Alternatively, when the support position and quantity are fine-tuned in S5, only the region with excessive load or deformation is locally adjusted.

[0016] Alternatively, Fh / A < 0.7 MPa and Fv / A < 2 MPa in S6, wherein Fh is a horizontal support reaction force, Fv is a vertical support reaction force, and A is a base plate area.

[0017] In summary, due to the adoption of the technical solutions described above, the present application has the following beneficial effects: 1. The flexible support method for a water distribution ring pipe provided by the present application allows the water distribution ring pipe to freely slide with deformation during pressing, avoiding uncontrollable high stress caused by local high rigidity constraints, as the body feet are in contact with the support members and can slide relative to the support members; the support base plate cooperates with the tensioning assembly to control the load at each support point by adjustment, preventing the support base plate from being pulled out due to excessively high individual support load.

[0018] The unique support logic suitable for the load transmission and deformation release of the large water distribution ring pipe is formed according to the annular fork structure and deformation characteristics of the large water distribution ring pipe.

[0019] 2. The flexible support method for a water distribution ring pipe provided by the present application forms a complete closed loop from pipe section processing according to transportation restrictions, to selection of support members according to weight, to construction of a three-dimensional model for nonlinear finite element calculation, to verification by extraction of support reaction force and deformation, to fine adjustment and iteration of areas exceeding the standard, and finally to determination of the base plate area, filling the gap of the lack of systematic quantitative means in the design of support for large units in the traditional method. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a method flowchart.

[0021] Figure 2 is a schematic view of a water distribution ring pipe body and body feet.

[0022] Figure 3 is a schematic view of a flexible support device.

[0023] Figure 4 is a schematic view of a pipe section and a flexible support device.

[0024] Figure 5 is a schematic view of a water distribution ring pipe body and a flexible support device.

[0025] Markings in the figure: 1 - water distribution ring pipe body, 2 - support base plate, 3 - support jack, 4 - tensioning screw, 5 - height adjustment nut, 6 - pre-tightening nut, 7 - body foot. DETAILED DESCRIPTION

[0026] The present application will be described in detail below with reference to the accompanying drawings.

[0027] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0028] A flexible support method for a water distribution ring, as shown in Figures 1-5 The flexible support device comprises a plurality of body feet 7 arranged at the bottom of the water distribution ring body 1, a support member is arranged below each body foot 7, the support member is in contact with the body foot 7 and can slide relative to the body foot 7, and a support bottom plate 2 is arranged at the lower end of the support member, and a tensioning assembly is further arranged between the support bottom plate 2 and the body foot 7. The plurality of body feet 7 at the bottom of the water distribution ring body 1 provide uniformly distributed stress points for load transmission, and transmit the weight of the water distribution ring and the load generated during pressing to the support structure below. The support member below the body foot 7 directly receives the load, and the design that the support member is in contact with the body foot 7 and can slide relative to the body foot 7 allows the relative displacement between the support member and the body foot 7 when the water distribution ring naturally deforms due to the action of high-pressure liquid during pressing, thereby avoiding local high stress concentration caused by excessive constraint in traditional rigid connection. The support bottom plate 2 at the lower end of the support member serves as a load-bearing foundation to stably transmit the dispersed load to the concrete foundation, ensuring that the load can be uniformly borne. The tensioning assembly between the support bottom plate 2 and the body foot 7 can balance the stress of each support point through adjustment, thereby avoiding abnormality of individual supports due to excessive load. The sliding design releases the stress generated by the deformation of the water distribution ring, preventing local stress from being too high; the distributed arrangement of multiple support members allows the load to be uniformly dispersed at multiple points; and the tensioning assembly further adjusts the stress balance, reducing the load difference of each support point. Thus, the problems of uneven stress on local pipe sections and easy pulling out of the support bottom plate 2 due to load concentration in the background art are effectively solved, and the safety and stability of the pressing process of the water distribution ring are improved.

[0029] The method comprises the following steps: S1, dividing the water distribution ring body 1 into a plurality of pipe sections according to the transportation limit; S2, selecting the specifications of the support members according to the weight of each pipe section; S3, initially constructing a three-dimensional model with flexible support, loading the maximum pressing pressure on the surface of the pipe section body, applying a fixed constraint to the lower surface of each support bottom plate 2, and then carrying out structural nonlinear finite element calculation after applying component constraints according to the actual load bearing of the flexible support; S4, extracting the support reaction force at the fixed constraint of each flexible support bottom plate 2 to verify the horizontal support reaction force and the vertical support reaction force, and extracting the maximum deformation at the outlet of the water distribution ring to verify the deformation; S5, if the calculation result does not meet the requirement of S4, fine-tune the support position and quantity in the exceeding area according to the result of S4, repeat the calculation of S4 step until the requirement is met; S6, extract the support base plate 2 load of the final calculation model, determine the base plate area, and make the area meet the proportion requirement of horizontal support reaction force and vertical support reaction force.

[0030] S1 divides the water distribution ring pipe body 1 into sections according to the transportation limit, facilitates the transportation and on-site assembly of large pipe body, provides basis for subsequent targeted support design, and avoids the problem that the support design is difficult to accurately adapt due to the large overall structure. S2 selects the support piece specification according to the pipe section weight, ensures that the carrying capacity of the support piece matches the pipe section weight, and avoids the problem that the support piece cannot bear the load due to insufficient specification from the source. S3 carries out finite element calculation by constructing a three-dimensional model and loading the maximum pressing pressure under actual working conditions, which can simulate the stress and deformation of the support before actual application, accurately predict potential problems. S4 extracts the support reaction force and deformation for verification, which is a preliminary test of the support performance, ensures that the horizontal and vertical support reaction forces and deformations are within a reasonable range, and prevents excessive load or excessive deformation. S5 solves the problem of exceeding the standard by iteratively fine-tuning the support position and quantity, optimizes the support design, and avoids abnormal stress caused by improper position or quantity of local support. S6 determines the base plate area according to the final load and meets the proportion requirement, ensures that the contact area between the support base plate 2 and the concrete foundation is sufficient, and avoids excessive unit area load. From pipe section disassembly to support piece selection, to simulation calculation verification and optimization, and finally to determine the base plate area, a systematic design process is formed. Section processing makes the support design more targeted, support piece specification matching ensures the foundation carrying capacity, finite element calculation and iterative optimization can accurately control the support reaction force and deformation, avoid local high stress and uneven load, and reasonable determination of the base plate area prevents the base plate from being pulled out. Thus, the problems of uneven stress of local high stress pipe section, easy pulling out of support base plate 2, etc. of traditional high rigidity support on large water distribution ring pipe in the background technology are effectively solved, and the safety and reliability of the pressing process are improved.

[0031] As another specific embodiment, the support is a support jack 3, the upper end of which is supported on the body leg 7 and is not welded to the body leg 7 and can slide relative to the body leg 7, and the lower end of which is welded to the support bottom plate 2. The support jack 3 as a support, the lower end of which is welded to the support bottom plate 2, can ensure that the vertical direction pressure is stably transmitted to the concrete foundation, provides rigid foundation guarantee for the support, and avoids loosening or deviation in the load transmission process. The design that the upper end is not welded to the body leg 7 and can slide relative to the body leg 7 is exactly suitable for the horizontal deformation trend when the water distribution ring pipe is pressed. When the pipe section is stretched and straightened due to the action of high-pressure liquid, the relative sliding of the jack and the body leg 7 can release the horizontal force generated by the deformation, avoid the local high stress concentration caused by forced constraint in the traditional rigid connection, and make the pipe section bear force more uniformly. The welding of the lower end ensures the stability of the bearing, and the sliding of the upper end gives the support adaptability to deformation, which meets the rigid demand of load transmission and avoids local stress out of control through flexible release.

[0032] As another specific embodiment, the support jack 3 is provided with a height adjusting nut 5 at the bottom. The height adjusting nut 5 at the bottom of the support jack 3 can change the overall height of the jack by screwing, so as to accurately adapt to the height requirement of the body leg of the water distribution ring pipe 1. In the process of dividing the water distribution ring pipe into sections according to the transportation limit and on-site assembly and welding, the pipe sections may have height deviation due to manufacturing or installation errors. The height adjusting nut 5 can flexibly compensate for the deviation, ensure that the upper end of the jack is in close contact with the body leg 7, ensure the stability of the load transmission, and avoid local stress concentration caused by poor contact. In combination with the sliding characteristics of the support jack 3 and the body leg 7 and the pre-tightening adjustment function of the tensioning screw 4, the height adjusting nut 5 further improves the adaptability of the support system, so that each support point can be flexibly adjusted in height according to the actual working condition, and the stress of each support point is more uniform.

[0033] As another specific embodiment, the position of the support of each pipe section is away from the center of gravity of the pipe section and is evenly arranged along the center of gravity. The position of the support of each pipe section away from the center of gravity and evenly arranged along the center of gravity can form a more stable force balance system by increasing the distance between the support point and the center of gravity. Being away from the center of gravity can enhance the resistance to the overturning moment generated by the deformation of the pipe section due to the pressure, reduce the inclination or load deviation of the pipe section due to the local stress deviation, and evenly arranging along the center of gravity can make the load borne by each support more balanced, avoiding excessive stress in a certain area due to concentrated support. Combined with the stretching and straightening trend of the annular fork structure of the distribution ring pipe during pressure, the load generated by deformation can be dispersed. The design away from the center of gravity improves the anti-deformation stability of the support system, and the uniform arrangement ensures that the load difference of each support point is minimized. The combined effect of the two can further reduce the local stress concentration of the pipe section and reduce the risk of the individual support base plate 2 being pulled out due to excessive load. The sliding characteristics and load adjustment function of the flexible support form a synergy, more accurately adapt to the characteristics of large distribution ring pipe with poor rigidity and large deformation, and enhance the safety and reliability of the support system.

[0034] As another specific embodiment, the tensioning assembly includes a tensioning screw 4 arranged outside the support, and a pre-tightening nut 6 arranged above the body foot 7 of the tensioning screw 4. The tensioning screw 4 is arranged outside the support jack 3, which can form a force division with the jack. The jack mainly bears the downward vertical pressure and horizontal friction load, while the tensioning screw 4 specially bears the upward tension of the distribution ring pipe, avoiding stress concentration caused by complex multi-directional load of a single support component. The pre-tightening nut 6 arranged above the body foot 7 can adjust the pre-tightening force of the tensioning screw 4 by tightening or loosening, thereby controlling the pressure acting on the support jack 3 and accurately adjusting the horizontal load at each support position. When the distribution ring pipe is pressed to produce horizontal deformation, the adjustment of the pre-tightening force can balance the stress difference of each support point, preventing individual supports from exceeding the design range due to excessive load.

[0035] As another specific embodiment, the support base plate 2 is embedded in the concrete foundation and the upper surface is exposed to the concrete surface. The support base plate 2 is embedded in the concrete foundation, which can enhance the connection strength with the foundation by the wrapping of the concrete, so that the base plate and the concrete form an integral force structure, effectively resisting the vertical and horizontal load transmitted when the water distribution ring is pressed, and avoiding the base plate from loosening or displacement due to excessive stress. The upper surface is exposed to the concrete surface, which provides a stable connection foundation for the support jack 3, facilitating the welding and fixation of the jack and the base plate, ensuring that the pressure borne by the jack can be directly transmitted to the base plate, and then transmitted to the concrete through the embedded part, forming a complete force transmission path. The part embedded in the concrete improves the uplift capacity of the base plate, preventing it from being pulled out of the concrete under high load, while the exposed upper surface ensures reliable connection with the upper support component, making the load transmission more direct and efficient. In cooperation with the sliding characteristics of the support jack 3 and the pre-tightening adjustment function of the tensioning screw 4, it can better disperse the load generated by the deformation of the water distribution ring, reduce local stress concentration, further adapt to the characteristics of large water distribution ring with poor rigidity and large deformation, and enhance the safety and stability of the support system during the pressing process.

[0036] As another specific embodiment, when selecting the specifications of the jacks in S2, the number of support components configured for each pipe section is not less than 3, and the theoretical lifting weight of the support components is not less than 3 times the weight of the pipe section. The number of support components configured for each pipe section is not less than 3, which can form a multi-point distributed support structure. With the stability of three or more supports, the risk of gravity shift that may occur when supporting with a single point or two points is avoided, allowing the weight of the pipe section and the load generated by the deformation during pressing to be more evenly distributed to each support point, reducing local stress concentration caused by insufficient support points, especially adapting to the characteristics of large water distribution ring with poor rigidity and large deformation, and enhancing the anti-overturning capacity of the support system. The theoretical lifting weight of the support components is not less than 3 times the weight of the pipe section, which is to cope with the complex stress situation during the pressing of the water distribution ring. The pipe section not only bears its own weight, but also generates additional dynamic load and additional force due to the action of high-pressure liquid. Reserving 3 times the carrying capacity can effectively resist these superimposed loads, prevent the support components from failing under instantaneous high load, and ensure stable load bearing even in extreme conditions. The combination of multi-point distribution in quantity and safety margin in weight not only reduces local stress through uniform distribution, but also copes with complex loads through redundant bearing. In cooperation with the sliding characteristics of the support jack 3, the adjustment function of the tensioning assembly, and the optimization process of finite element calculation, the stress of each support point can be more accurately controlled, further reducing the risk of the support base plate 2 being pulled out, and enhancing the support safety and reliability during the pressing process of the large water distribution ring.

[0037] As another specific embodiment, in the structure nonlinear finite element calculation in S3, the pressure loaded inside the water distribution ring is the strength test pressure. In the structure nonlinear finite element calculation, the water distribution ring is loaded with the strength test pressure inside, which is to simulate the stress state of the water distribution ring under the most severe working condition. The strength test pressure is the highest pressure that the water distribution ring may bear in the pressure test process, which can truly reflect the deformation trend of the pipe under the action of high-pressure liquid, the load transfer law, and the stress response of the support system. Especially for the characteristics of large water distribution ring with poor rigidity and large deformation, the potential problems such as stress concentration and uneven load distribution of each support point under high pressure can be accurately captured. Based on the calculation results under the strength test pressure, reliable basis can be provided for subsequent support reaction verification (S4) and support position and quantity adjustment (S5), so as to ensure that the optimized support system can control the horizontal / vertical support reaction and deformation within the design range even under the highest pressure in the actual pressure test. Through the simulation and optimization under the limit condition in advance, the risk of support failure caused by not considering the influence of the highest pressure in the traditional design is avoided, and the safety and reliability of the support system in the pressure test process of the large water distribution ring are further improved. Together with the structure design of flexible support, a complete protection system for high-pressure environment is formed.

[0038] As another specific embodiment, in S4, the horizontal support reaction of each flexible support Fh<200kN, the vertical support reaction of each flexible support Fv<500kN, and the deformation of the water distribution ring outlet <4mm. The upper limit of the horizontal and vertical support reactions is directly aimed at the problem of large load difference of each support point in the traditional support. By controlling the horizontal and vertical forces borne by a single support, stress concentration caused by excessive load of local support is avoided, and the risk of bottom plate being pulled out is reduced by preventing the unit area load of the support bottom plate 2 from exceeding the bearing capacity of concrete. The limitation of the deformation of the water distribution ring outlet focuses on the structural stability of the pipe itself, ensuring that the deformation at the outlet is within a controllable range under high pressure, avoiding excessive deformation affecting the overall structural integrity of the pipe or the cooperation precision with other components. Specific verification standards are provided for the finite element calculation results, so that the subsequent adjustment of support position and quantity (S5) has a specific direction, ensuring that the optimized support system can accurately control the load and deformation. By converting the abstract safety requirements into specific numerical values, the limitations of relying on experience in the traditional design are avoided, so that the large water distribution ring can release stress through the sliding and adjusting functions of the flexible support in the pressure test process, and the stress within a safe range is ensured through the explicit threshold control, further improving the scientificity and reliability of the support design, and effectively solving the safety hazards of the traditional high-rigidity support in large units.

[0039] As another specific embodiment, in S5, the fine-tuning of the support position and quantity is only performed on the region where the load or deformation exceeds the standard. In S5, the support position and quantity are only adjusted locally on the region where the load or deformation exceeds the standard, which can accurately focus on the problem point and avoid indiscriminate changes to the overall support system. Through targeted adjustment, the design redundancy can be reduced, the cost of repeated calculation and optimization can be reduced, and the problem of affecting the support region that meets the standard due to overall changes can be avoided, ensuring efficient and accurate optimization process. Local adjustment combined with the accurate analysis of finite element calculation can quickly locate and solve the problem of local high stress or load concentration, so that the stress and deformation of each support point gradually approach the design requirements. Combined with the flexible sliding characteristics of the support member and the load adjustment function of the tensioning assembly, the load distribution can be further refined to ensure that the overall stress of the pipe joint is more uniform and the load of the support base plate 2 is more controllable.

[0040] As another specific embodiment, in S6, Fh / A < 0.7 MPa and Fv / A < 2 MPa, where Fh is the horizontal support reaction force, Fv is the vertical support reaction force, and A is the area of the base plate. By controlling the unit area load on the contact surface between the support base plate 2 and the concrete foundation, it is ensured that the concrete foundation can stably bear the horizontal and vertical forces during the pressing process of the water distribution ring pipe. The Fh / A limit in the horizontal direction can prevent the horizontal support reaction force from generating excessive pressure on the contact surface between the base plate and the concrete, preventing the concrete from cracking or the base plate from sliding due to the horizontal force; the Fv / A limit in the vertical direction can prevent the vertical support reaction force from causing excessive local pressure on the concrete foundation, which can damage the concrete foundation, or the support base plate 2 can be pulled out of the concrete. Based on the support reaction force obtained by finite element calculation in the previous steps and combined with the accurate calculation of the base plate area, the abstract load control is converted into specific foundation design parameters, ensuring that the load capacity of the concrete foundation matches the load transmitted by the support base plate 2. It not only verifies the support reaction force of S4 and the local adjustment results of S5, but also provides a foundation guarantee for the final safety of the support system, effectively solving the problem of foundation damage or base plate pulling out caused by not quantifying the contact pressure between the base plate and the concrete in traditional high-rigidity support.

[0041] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. The present application extends to any novel features or any new combinations disclosed in the specification and any modifications, equivalent replacements and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application. It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the details of the technical features not disclosed in the embodiments, such as specific structures, can be obtained from the prior art. The connection mode can be fixed connection, detachable connection or integral; it can be fixed connection, movable connection or hinged connection, and it can be directly connected or indirectly connected through an intermediate medium. Those skilled in the art can understand the specific mode of the above terms in the embodiments of the present application according to the specific circumstances, and the embodiments of the present disclosure do not specifically limit the above terms.

Claims

1. A method of flexible support of a water distribution ring, characterized in that: The flexible support device comprises a plurality of body feet arranged at the bottom of the water distribution ring pipe body, a support member is arranged below each body foot, the support member is in contact with the body foot and can slide relative to the body foot, a support bottom plate is arranged at the lower end of the support member, and a tensioning assembly is further arranged between the support bottom plate and the body foot. The method comprises the following steps: S1, dividing the water distribution ring pipe body into a plurality of pipe sections according to the transportation limit; S2, selecting the support member specifications according to the weight of each pipe section; S3, initially constructing a three-dimensional model with flexible support, loading the maximum pressing pressure on the surface of the pipe section body, applying a fixed constraint to the lower surface of each support bottom plate, and then carrying out structural nonlinear finite element calculation according to the actual load bearing condition of the flexible support and the constraint between components; S4, extracting the support reaction force at the fixed constraint of each flexible support bottom plate, verifying the horizontal support reaction force and the vertical support reaction force, and extracting the maximum deformation at the outlet of the water distribution ring pipe to verify the deformation; S5, if the calculation result does not meet the requirement of S4, adjusting the support position and quantity in the over-standard area according to the result of S4, repeating the calculation of S4 until the requirement is met; S6, extracting the support bottom plate load of the final calculation model to determine the area of the bottom plate, so that the area meets the proportion requirement of the horizontal support reaction force and the vertical support reaction force.

2. The water distribution loop flexible support method of claim 1, wherein: The support member is a support jack, the upper end of the support jack is supported on the body foot and is not welded with the body foot and can slide relative to the body foot, and the lower end of the support jack is welded with the support bottom plate.

3. The water distribution loop flexible support method of claim 2, wherein: The bottom of the support jack is provided with a height adjusting nut.

4. The water distribution loop flexible support method of claim 1, wherein: The position of the support member arranged on each pipe section is away from the center of gravity of the pipe section and is uniformly arranged along the center of gravity of the pipe section.

5. The water distribution loop flexible support method of claim 1, wherein: The tensioning assembly comprises a tensioning screw arranged outside the support member, and a pre-tightening nut is arranged above the body foot on the tensioning screw.

6. The water distribution loop flexible support method of claim 1, wherein: The support bottom plate is embedded in the concrete foundation and the upper surface is exposed above the concrete surface.

7. The water distribution loop flexible support method of claim 1, wherein: When selecting the jack specifications in S2, the number of support members arranged on each pipe section is not less than 3, and the theoretical lifting weight of the support member is not less than 3 times the weight of the pipe section.

8. The water distribution loop flexible support method of claim 1, wherein: When carrying out the structural nonlinear finite element calculation in S3, the pressure loaded in the water distribution ring pipe is the strength test pressure.

9. The water distribution loop flexible support method of claim 1, wherein: When adjusting the support position and quantity in S5, only the area with excessive load or deformation is adjusted locally.

10. The water distribution loop flexible support method of claim 1, wherein: In S6, Fh / A<0.7MPa and Fv / A<2MPa, wherein Fh is the horizontal support reaction force, Fv is the vertical support reaction force, and A is the area of the bottom plate.

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