Test method suitable for novel pile foundation stand column type output single-point land rotation test

Abstract

The invention discloses a test method suitable for a novel pile foundation stand column type output single point land rotation test, and relates to the technical field of ocean engineering, the method is based on a balancing weight and a forklift, and external driving force is provided for the novel pile foundation stand column type output single point; according to the method, a chain block or a hanging belt and a tension meter are used as flexible connection to connect external driving force with the novel pile foundation stand column type output single point, and then land rotation of the novel single point device is achieved; in the rotation test process, the method can help technicians to successfully collect the values of the starting torque and the running torque most concerned by the novel single-point device in each test stage; by means of the method, the novel pile foundation stand column type output single point can smoothly complete rotation tests under three working conditions on the land, the test period is greatly shortened while the project quality is guaranteed, and the method has the advantages of being low in test cost, short in test period, high in safety, small in affected factor, high in applicability and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ocean engineering, and particularly relates to a test method suitable for a new pile column type single-point land rotation test of an external transport. BACKGROUND

[0002] A conventional crude oil external transport single-point device is a kind of offshore equipment for crude oil external transport, which mainly comprises a mooring buoy, a slip ring, a bearing and a rotating platform. For the conventional crude oil external transport single-point device, a floating state is mainly realized through a buoy system, and 360-degree free rotation around the buoy can be realized. Generally, the conventional crude oil external transport single-point device mainly performs related performance evaluation through offshore rotation. The new single-point device is a pile column type external transport single-point device, which is a new external transport single-point structure combining an upper facility similar to a traditional floating type external transport single-point device with a pile foundation structure. After the assembly integration of the slip ring, the bearing and the rotating platform system is completed on land, the assembly integration effect needs to be evaluated in time, and therefore, the land rotation test needs to be carried out. At present, there is no suitable land rotation test method for the new single-point device. SUMMARY

[0003] In order to solve the technical problem that the new single-point device has no suitable land rotation test method in the prior art, the present application provides a test method suitable for a new pile column type external transport single-point land rotation test.

[0004] The test method suitable for the new pile column type external transport single-point land rotation test provided by the present application adopts the following technical scheme:

[0005] The test method suitable for the new pile column type external transport single-point land rotation test comprises the following steps:

[0006] S1: core component inspection: the bearing, the slip ring and the driving arm in the new single-point device are comprehensively inspected, and installation, welding and inspection qualified certificates confirmed by all parties should be provided;

[0007] S2: support tool stability calculation: the stability of the support tool of the new single-point device on land is calculated to ensure that the stability of the single-point device can meet the test requirements in the rotation test process;

[0008] S3: device weighing and gravity balancing: the new single-point device is weighed and balanced to ensure that the gravity center is located at the center of the overall structure, the weight is consistent with the actual weight during offshore installation, and the error should meet the requirements of the design specification book. The purpose of this step is to simulate the equipment state of the new single-point device during offshore installation;

[0009] S4: Safety clearance radius calculation: According to the length of the soft connection composed of the chain or sling, and the tensiometer, combined with the drag angle, the minimum safety test clearance radius around the new single-point device is calculated, and the area is effectively isolated;

[0010] S5: Division of test stage of rotary table: According to the equipment structure and test outline, the outer contour of the circular rotary table of the new single-point device is evenly divided into several arcs based on a certain central angle, and marked, and a point is selected as an observation point at a suitable position on the ground. The arc intervals crossed by the observation point during rotation are the test stages of the rotation test;

[0011] S6: Interference investigation of clearance area: interference check is carried out within the clearance radius, that is, the equipment, cables, canvas, scaffolding and tower, etc. affecting the rotation of the new single-point device are removed. If part of the scaffolding cannot be completely removed, personnel need to be arranged for monitoring during the rotation test;

[0012] S7: Rotary table rotatable state preparation: After confirming that the slip ring is connected with the driving arm, rough centering of the slip ring and the flange face of the outlet pipeline is started. Finally, the temporary support of the new single-point device needs to be removed, and the pins of the rotary table locking system are pulled out one by one, so that the rotary table is in a rotatable state;

[0013] S8: First rotation test: According to S5, the following parameters need to be measured and recorded in each test stage of the rotation test: torque value, first, the starting torque of the new single-point facility is measured by using the mode of counterweight plus chain and tensiometer. The starting torque can be recorded and read by tensiometer. After confirming that the starting torque meets the requirements of the specification, the running torque during rotation of the new single-point facility can be measured by using the mode of forklift plus sling and tensiometer, and the running torque is also recorded and read by tensiometer; offset, the offset of the slip ring and the outlet pipeline needs to be measured, as follows: measure the offset values a and b of the slip ring flange face and the outlet pipeline flange face in the vertical and horizontal directions; measure the vertical distances A' and B' from points A and B on the outlet pipeline flange face in the horizontal direction to the slip ring flange face. Before the rotation test starts, the initial values of each parameter need to be recorded, and the offset during the test should not exceed the requirements of the specification; when the single-point device rotates 180 degrees, the plug-in test of the rotary table locking system needs to be carried out;

[0014] S9: After the first rotation test, the new single-point facility needs to be checked comprehensively;

[0015] S10: Install the expansion joint between the slip ring and the outlet pipeline, and select a pipeline section containing the slip ring. Install blind plates at both ends of the pipeline section. After the above work is completed, the pipeline section is filled with water and pressurized to the rated working pressure;

[0016] S11: Perform the second rotation test: According to S5, the following parameters need to be measured and recorded during the test phase of each rotation test: torque value, first measure the starting torque of the new single-point facility using the mode of counterweight plus chain and tension gauge, the starting torque can be recorded and read by the tension gauge, after confirming that the starting torque meets the specification requirements, the running torque during the rotation of the new single-point facility can be measured using the mode of forklift plus sling and tension gauge, and the running torque is also recorded and read by the tension gauge; pressure monitoring, the pressure monitoring of the water injection and pressure charging pipeline segment needs to be continuously monitored, and the pressure decay value during this period needs to meet the specification requirements;

[0017] S12: After the completion of the second rotation test, the new single-point facility needs to be comprehensively inspected;

[0018] S13: Continue to inject water into the pipe segment and charge to the design pressure;

[0019] S14: Perform the third rotation test: According to S5, the following parameters need to be measured and recorded during the test phase of each rotation test: torque value, first measure the starting torque of the new single-point facility using the mode of counterweight plus chain and tension gauge, the starting torque can be recorded and read by the tension gauge, after confirming that the starting torque meets the specification requirements, the running torque during the rotation of the new single-point facility can be measured using the mode of forklift plus sling and tension gauge, and the running torque is also recorded and read by the tension gauge; pressure monitoring, the pressure monitoring of the water injection and pressure charging pipeline segment needs to be continuously monitored, and the pressure decay value during this period needs to meet the specification requirements;

[0020] S15: After the completion of the third rotation test, the new single-point facility needs to be comprehensively inspected;

[0021] S16: After the completion of the rotation test, the pipe segment is depressurized, the temporary flange blind plate is removed, and the site is cleaned.

[0022] Further, between steps S8 and S9, the following requirements should also be met: the rotation speed should not exceed the requirements of the specification; the tension direction needs to be within a certain angle range of the tangent direction of the hanging point; the test needs to be carried out in the clockwise 360° and counterclockwise 360° rotation process.

[0023] Further, between steps S8 and S9, the running state of the slip ring, bearing and driving arm should also be monitored, any abnormal sound, vibration, jamming, etc. can stop the rotation test, and record it.

[0024] Further, between steps S10 and S11, the water injection and pressure charging pipe segment should also be pressure maintained for a period of time, and S11 can be carried out after the pressure maintenance test meets the specification requirements.

[0025] Further, between the steps S11 to S12, the following requirements should also be met: the rotating speed should not exceed the requirements of the specification; the tension direction should be within a certain angle range of the tangent direction of the hanging point; and the test should be carried out in the clockwise 360° and counterclockwise 360° rotation process.

[0026] Further, between the steps S11 to S12, the running state of the slip ring, bearing, driving arm and expansion joint should also be monitored, and any abnormal sound, vibration, jamming and the like can stop the rotation test and be recorded.

[0027] Further, between the steps S13 to S14, the pipe section subjected to water injection and pressure should be pressure-kept for a period of time, and the S14 can be carried out after the pressure-keeping test meets the requirements of the specification.

[0028] Further, between the steps S14 to S15, the following requirements should also be met: the rotating speed should not exceed the requirements of the specification; the tension direction should be within a certain angle range of the tangent direction of the hanging point; and the test should be carried out in the clockwise 360° and counterclockwise 360° rotation process.

[0029] Further, between the steps S14 to S15, the running state of the slip ring, bearing, driving arm and expansion joint should also be monitored, and any abnormal sound, vibration, jamming and the like can stop the rotation test and be recorded.

[0030] In summary, the beneficial effects of the present application are:

[0031] 1. The method of the present application is based on the counterweight and the forklift, and provides an external driving force for the new pile column type single-point external conveying device; the method uses a chain or a sling, a tension meter as a soft connection to connect the external driving force and the new pile column type single-point external conveying device, thereby realizing the land rotation of the new single-point device.

[0032] 2. The use of the method of the present application can help the technical personnel to successfully collect the values of the starting torque and the running torque of the new single-point device in each test stage.

[0033] 3. The method of the present application enables the new pile column type single-point external conveying device to successfully complete the rotation test under three working conditions on land, greatly shortens the test period while ensuring the engineering quality, and has the advantages of low test cost, short test period, high safety, small affected factors and high applicability.

[0034] 4. The method of the present application carries out the land rotation test of the new pile column type single-point external conveying device, thereby completing the evaluation of the total assembly integration effect of the new single-point device, greatly shortens the test period while ensuring the engineering quality. BRIEF DESCRIPTION OF DRAWINGS

[0035] Fig. 1 Schematic diagram for dividing a test phase of a rotation test of the present application;

[0036] Fig. 2 Schematic diagram for torque measurement of the rotation test of the present application;

[0037] Fig. 3 Schematic diagram for offset collection point of the rotation test of the present application under working condition 1. DETAILED DESCRIPTION

[0038] The present application will be further described in conjunction with specific embodiments, and the schematic embodiments and descriptions of the present application are used to explain the present application, but not as a limitation of the present application.

[0039] An embodiment: a test method suitable for a new pile foundation column type single-point land rotation test as shown in Fig. 1 , Fig. 2 , Fig. 3 .

[0040] The main purpose of the present application is to carry out land rotation test for a new pile foundation column type single-point device, and then complete the evaluation work of the overall integration effect of the new single-point device, while ensuring the engineering quality, and greatly shortening the test period.

[0041] Referring to Figs. 1-3 , the present application discloses a test method suitable for a new pile foundation column type single-point land rotation test, comprising the following steps:

[0042] First step: before formal test, it is necessary to ensure that the bearings, slip rings and driving arms in the new single-point device are completed overall assembly, and have installation, welding and inspection qualified certificates confirmed by all parties. At the same time, the stability of the supporting tooling of the new single-point device on land is calculated to ensure that the stability of the single-point device can meet the test requirements in the rotation test process, avoid test interruption due to component installation defects, save the complex floating state stability debugging process compared with traditional offshore test, and greatly shorten the preparation period. Finally, the new single-point device is weighed and balanced to ensure that its center of gravity is located at the center of the overall structure, its weight is consistent with the actual weight during offshore installation, and its error should meet the requirements of the design specification. The purpose of this step is to simulate the equipment state of the new single-point device during offshore installation, to ensure that the land test can truly simulate the offshore rotation working condition, and the data can directly guide the offshore installation.

[0043] Second step: according to the length of the soft connection composed of the chain or sling, tension meter, and combined with the dragging angle, the minimum safe test clear radius around the new single-point device is calculated, and the area is effectively isolated to eliminate the risk of personnel and equipment interference through physical isolation.

[0044] Third step: According to the device structure and test outline, the new single-point device circular table outer contour is evenly divided into several arcs with a 30° central angle as the reference, and is marked at the same time. A point is selected as an observation point on the ground at a suitable position. The arc intervals crossed by the observation point during rotation are the test stages of the rotation test. The technical personnel can accurately capture the torque mutation point of each angle, which greatly reduces the error rate compared with the traditional continuous recording.

[0045] Fourth step: Interference check is carried out within the clear radius. The equipment, cables, canvas, scaffolding and tower, etc. affecting the rotation of the new single-point device are removed. If part of the scaffolding cannot be completely removed, personnel need to be arranged to monitor during the rotation test to avoid mechanical collision during rotation and ensure test safety.

[0046] Fifth step: After confirming that the slip ring is connected with the driving arm, rough centering of the slip ring and the flange face of the outlet pipeline is started. Finally, the temporary support of the new single-point device needs to be removed, and the bolts of the turntable locking system are pulled out one by one, so that the turntable is in a rotatable state.

[0047] Sixth step: The first rotation test (working condition 1) is carried out. The whole process needs to meet the following requirements: the rotation speed should not exceed 1 degree per minute; the tension direction needs to be controlled within 10 degrees of the tangent direction of the hanging point; the test needs to be rotated clockwise and counterclockwise for 360°. According to the third step, the following parameters need to be measured and recorded in each test stage of the rotation test: 1. Torque value. First, the starting torque of the new single-point facility is measured by using the mode of counterweight plus chain and tension gauge. The starting torque can be recorded and read by the tension gauge. After confirming that the starting torque meets the specification requirements, the running torque during rotation of the new single-point facility can be measured by using the mode of forklift plus sling and tension gauge, and the running torque is also recorded and read by the tension gauge; 2. Offset. The offset of the slip ring and the outlet pipeline needs to be measured, which is as follows: the offset values a and b of the slip ring flange face and the outlet pipeline flange face in the vertical and horizontal directions are measured; the vertical distances A' and B' from points A and B (located on the two points of the outlet pipeline flange face in the horizontal direction) to the slip ring flange face are measured. Before the rotation test starts, the initial values of each parameter need to be recorded, and the offset should not exceed 10 mm during the test. The sealing performance of the flange faces of the slip ring and the pipeline is ensured to avoid the risk of leakage due to excessive offset. 3. State monitoring. The running state of the slip ring, bearing and driving arm needs to be monitored during the test. Any abnormal sound, vibration, jamming, etc. needs to stop the rotation test and be recorded; 4. When the single-point device rotates 180 degrees, the plug-in test of the turntable locking system needs to be carried out.

[0048] Step 7: After the first rotation test, the new single-point facility needs to be checked comprehensively;

[0049] Step 8: Install the expansion joint between the slip ring and the outlet pipeline, and select a pipeline section containing the slip ring. Install blind plates at both ends of the pipeline section. After the above work is completed, the pipeline section is water-filled and pressurized to the rated working pressure. After the pressurization is completed, it needs to be pressure maintained for 30 minutes. After the pressure maintenance meets the specification requirements, the next step can be performed;

[0050] Step 9: Perform the second rotation test (working condition 2). The entire process needs to meet the following requirements: the rotation speed should not exceed 1 degree per minute; the tension direction needs to be controlled within 10 degrees of the tangent direction of the hanging point; the test needs to be rotated clockwise 360° and counterclockwise 360°. According to the third step, the following parameters need to be measured and recorded during each rotation test: 1. Torque value. First, use the mode of counterweight plus chain and tension gauge to measure the starting torque of the new single-point facility. The starting torque can be recorded and read by the tension gauge. After confirming that the starting torque meets the specification requirements, use the mode of forklift plus sling and tension gauge to measure the running torque during the rotation of the new single-point facility. The running torque is also recorded and read by the tension gauge; 2. Pressure monitoring. The pressure of the water-filled and pressurized pipeline section needs to be monitored continuously. During this period, the pressure decay value needs to meet the specification requirements; 3. State monitoring. The running state of the slip ring, bearing, drive arm, and expansion joint needs to be monitored during this period. Any abnormal sound, vibration, or jamming needs to be stopped and recorded;

[0051] Step 10: After the second rotation test, the new single-point facility needs to be checked comprehensively;

[0052] Step 11: Continue to water-fill the pipeline section and pressurize it to the design pressure. After the pressurization is completed, it needs to be pressure maintained for 30 minutes. After the pressure maintenance meets the specification requirements, the next step can be performed;

[0053] Twelfth step: the third rotation test (working condition 3) is carried out, and the whole process needs to meet the following requirements: the rotation speed should not be more than 1 degree per minute; the tension direction needs to be controlled within 10 degrees of the tangent direction of the hanging point; the test needs to be carried out in the clockwise 360° and counterclockwise 360° rotation process. According to the third step, the following parameters need to be measured and recorded in each rotation test test phase: 1, torque value. First, the starting torque of the new single-point facility is measured by using the mode of counterweight plus chain and tension gauge, the starting torque can be recorded and read by the tension gauge, after confirming that the starting torque meets the specification requirements, the running torque of the new single-point facility in the rotation process can be measured by using the mode of forklift plus sling and tension gauge, and the running torque is also recorded and read by the tension gauge; 2, pressure monitoring. The pressure monitoring of the water injection and pressure charging pipeline section needs to be carried out continuously, and the pressure decay value needs to meet the specification requirements during this period; 3, state monitoring. The running state of the slip ring, bearing, driving arm and expansion joint needs to be monitored during the period, and any abnormal sound, vibration, jamming and the like needs to be stopped and recorded;

[0054] Thirteenth step: after the completion of the third rotation test, the new single-point facility needs to be comprehensively checked;

[0055] Fourteenth step: after the completion of the rotation test, the pipe section is depressurized, the temporary flange blind plate is removed, and the site is cleaned.

[0056] The method of the present application is based on counterweight and forklift, which provides external driving force for the new pile column type single-point; the method uses chain or sling, tension gauge as soft connection to connect the external driving force and the new pile column type single-point, and then realizes the land rotation of the new single-point device. The use of the method can help the technical personnel to successfully collect the values of the starting torque and the running torque of the new single-point device in each test phase. The method enables the new pile column type single-point to successfully complete the rotation test under three working conditions on land, which greatly shortens the test period while ensuring the engineering quality, and has the advantages of low test cost, short test period, high safety, small influencing factors and high applicability.

[0057] The basic principles and main features of the present application are shown and described, and the advantages of the present application are shown and described. The various components mentioned in the present application are common techniques in the prior art, and those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A test method suitable for a new type of pile foundation column type external transmission single point land rotation test, characterized in that: The following steps are involved: S1: Core component review: Conduct a comprehensive inspection of the bearings, slip rings and drive arms in the new single-point device, which should be equipped with installation, welding and inspection certificates confirmed by all parties; S2: Support fixture stability calculation: The stability of the support fixture of the new single-point device on land is calculated to ensure that the stability of the single-point device can meet the test requirements during the rotation test; S3: Device weighing and center of gravity balancing: Weigh and balance the new single-point device to ensure that its center of gravity is located at the center of the overall structure. Its weight is consistent with the actual weight during offshore installation, and the error should meet the requirements of the design specifications. The purpose of this step is to simulate the equipment status of the new single-point device during offshore installation. S4: Safe Clearance Radius Calculation: Based on the length of the flexible connection consisting of the fall chain or sling and dynamometer, and the drag angle, the minimum safe test clearance radius around the new single-point device is calculated, and the area is effectively isolated; S5: Turntable test phase division: Based on the equipment structure and test outline, the outer contour of the circular turntable of the new single-point device is evenly divided into several arcs with a certain center angle as the reference. At the same time, a point is selected at a suitable position on the ground as an observation point. Each arc interval crossed by the observation point during the rotation process is a test phase of the rotation test; S6: Clear area interference check: Conduct interference checks within the clear radius, i.e. remove equipment, cables, canvas, scaffolding, towers, etc. that may affect the rotation of the new single-point device. If some scaffolding cannot be completely removed, personnel will need to be arranged to monitor the rotation test. S7: Prepare the turntable for rotation: After confirming that the connection between the slip ring and the drive arm is complete, begin rough alignment between the slip ring and the flange surface of its outlet pipeline. Finally, remove the temporary support of the new single-point device and pull out the pins of the turntable locking system one by one to put the turntable into a rotatable state. S8: Carry out the first rotation test: According to S5, the following parameters need to be measured and recorded in each test phase of the rotation test: Torque value, first use the counterweight block plus fall chain and dynamometer mode to measure the starting torque of the new single-point facility, and the starting torque can be recorded and read by the dynamometer. After confirming that the starting torque meets the requirements of the specification, the forklift plus sling and dynamometer mode can be used to measure the operating torque of the new single-point facility during the rotation process, and the operating torque is also recorded and read by the dynamometer; Offset, the offset of the slip ring and the outlet pipeline needs to be measured, specifically as follows: Measure the vertical and horizontal offset values ​​a and b between the slip ring flange surface and the outlet pipeline flange surface; Measure the vertical distances A' and B' from two points A and B in the horizontal direction of the outlet pipeline flange surface to the slip ring flange surface. Before the rotation test begins, the initial value of each parameter needs to be recorded, and the offset during the test must not exceed the requirements of the specification; After the single-point device rotates 180 degrees, the turntable locking system needs to be plugged in and out tested; S9: After the first rotation test is completed, the new single-point facility needs to be fully inspected; S10: Install the expansion joint between the slip ring and the outlet pipeline. At the same time, select a pipeline section including the slip ring and install blind plates at both ends. After the above work is completed, fill the pipeline section with water and pressurize it to the rated working pressure. S11: Conduct a second rotation test: According to S5, the following parameters need to be measured and recorded during each test phase of the rotation test: Torque value: First, the starting torque of the new single-point facility is measured using a counterweight block, a fall chain, and a dynamometer. The starting torque can be recorded and read using a dynamometer. After confirming that the starting torque meets the requirements of the specification, the operating torque of the new single-point facility during the rotation process can be measured using a forklift, a sling, and a dynamometer. The operating torque is also recorded and read using a dynamometer. Pressure monitoring: The water injection and pressurization pipeline section needs to be continuously pressure monitored, and its pressure decay value during this period must meet the requirements of the specification. S12: After the second rotation test is completed, a comprehensive inspection of the new single-point facility is required; S13: Continue to inject water into the pipe section and pressurize it to the design pressure; S14: Conduct the third rotation test: According to S5, the following parameters need to be measured and recorded during each test phase of the rotation test: Torque value: First, the starting torque of the new single-point facility is measured using a counterweight block, a fall chain, and a dynamometer. The starting torque can be recorded and read using a dynamometer. After confirming that the starting torque meets the requirements of the specification, the operating torque of the new single-point facility during the rotation process can be measured using a forklift, a sling, and a dynamometer. The operating torque is also recorded and read using a dynamometer. Pressure monitoring: The water injection and pressurization pipeline section needs to be continuously monitored for pressure, and its pressure decay value during this period must meet the requirements of the specification. S15: After the third rotation test is completed, a comprehensive inspection of the new single-point facility is required; S16: After the rotation test is completed, the pipe section is depressurized, the temporary flange blind plate is removed, and the site is cleaned.

2. A test method for a land rotation test of a new type of pile foundation column type external transmission single point device according to claim 1, characterized in that: The following requirements must also be met between steps S8 and S9: the rotation speed must not exceed the requirements of the specification; the direction of the pulling force must be within a certain angle range of the tangent direction of the hanging point; and the test must be performed in a 360° clockwise and 360° counterclockwise rotation process.

3. A test method for a land rotation test of a new type of pile foundation column type external transmission single point device according to claim 1, characterized in that: The operating status of the slip ring, bearing, and drive arm should also be monitored between steps S8 and S9. The rotation test may be stopped and recorded if any abnormal noise, vibration, or jamming occurs.

4. A test method for a land rotation test of a new type of pile foundation column type external transmission single point device according to claim 1, characterized in that: Between steps S10 and S11, the pipe section to be pressurized with water should be pressure-maintained for a period of time, and S11 can be carried out only after the pressure-maintaining test meets the requirements of the specification.

5. The test method for a new type of pile foundation column type external transmission single point device land rotation test according to claim 1, characterized in that: The following requirements should also be met between steps S11 and S12: the rotation speed does not exceed the requirements of the specification; the direction of the pulling force must be within a certain angle range of the tangent direction of the hanging point; and the test must be carried out in a 360° clockwise and 360° counterclockwise rotation process.

6. A test method for a new type of pile foundation column type external transmission single point device land rotation test according to claim 1, characterized in that: The operating status of the slip ring, bearing, drive arm and expansion joint should also be monitored between steps S11 and S12. The rotation test may be stopped and recorded if any abnormal noise, vibration, or jamming occurs.

7. The test method for a new type of pile foundation column type external transmission single point device land rotation test according to claim 1, characterized in that: Between steps S13 and S14, the pipe section to be pressurized with water should be pressure-maintained for a period of time, and S14 can be carried out only after the pressure-maintaining test meets the requirements of the specification.

8. The test method for a new type of pile foundation column type external transmission single point device land rotation test according to claim 1, characterized in that: The following requirements should also be met between steps S14 and S15: the rotation speed does not exceed the requirements of the specification; the direction of the pulling force must be within a certain angle range of the tangent direction of the hanging point; and the test must be carried out in a 360° clockwise and 360° counterclockwise rotation process.

9. The test method for a new type of pile foundation column type external transmission single point device land rotation test according to claim 1, characterized in that: The operating status of the slip ring, bearing, drive arm and expansion joint should also be monitored between steps S14 and S15. The rotation test can be stopped and recorded if any abnormal noise, vibration, or jamming occurs.

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