Method for measuring the deflection size of prestressed buried pipes

Abstract

The invention relates to the technical field of wind power generation and discloses a method for measuring the deflection size of a prestressed buried pipe, comprising the following steps: selecting one of N prestressed buried pipes distributed circumferentially on the top surface of a wind turbine foundation as a measured prestressed buried pipe, selecting a first positioning point and a second positioning point on the inner edge of the upper opening and the inner edge of the lower opening of the measured prestressed buried pipe respectively; lowering a plumb bob from the first positioning point into the measured prestressed buried pipe, extending the plumb bob to a position at the lower opening of the measured prestressed buried pipe and marking it as an actual exit point; calculating the distance between the theoretical exit point of the plumb bob and the second positioning point according to the length and inclination angle of the measured prestressed buried pipe, and staking out the theoretical exit point using a measuring instrument; measuring the distance between the theoretical exit point and the actual exit point using the measuring instrument to obtain the deflection of the measured prestressed buried pipe. The invention can measure the deflection of the prestressed pipe, thereby facilitating judgment on whether the deflection of the prestressed pipe is within an allowable range and whether correction measures need to be taken for the prestressed pipe.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation, and in particular to a method for measuring the deflection size of a prestressed buried pipe. Background Art

[0002] To alleviate the environmental problems caused by the use of fossil energy, wind energy, as a developed clean energy, has been widely used in many fields. Among them, wind power generation is a rapidly developing field, and wind turbines are important equipment for achieving wind power generation.

[0003] The deflection of the prestressed buried pipes in the foundation of a mixed-tower wind turbine significantly impacts the construction of prestressed components and the application of prestressed loads. In severe cases, this can lead to wrinkles in the PE layer of the upper steel strands in the restraint ring, rupture of the lower PE layer in the restraint ring, or the inability of the PE layer to enter the anchor seal. Furthermore, buried pipe deflection can cause the protruding portion of the buried pipe to interfere with the bottom of the concrete tower. The prestressed steel strands and the buried pipes may also interfere, causing friction between the prestressed steel strands and the buried pipes, leading to loss of prestress and wear of the anti-corrosion coating, affecting the durability of the structure. Furthermore, the prestressed steel strands exert significant pressure on the pipe end vibration damping and clustering device, the buried pipes, and the surrounding concrete. The prestressed steel strands cannot be vertically anchored to the anchor pad, resulting in tensioning deviations. These problems pose significant difficulties for the hoisting of the mixed-tower tower and the installation and tensioning of the prestressed steel strands, and also pose significant safety risks to the operation of the mixed-tower tower. Summary of the Invention

[0004] In view of this, the present invention provides a method for measuring the deflection size of prestressed buried pipes to solve the problem that the deflection of prestressed buried pipes is difficult to detect, which has a significant impact on the construction of prestressed components and the effect of prestressed load application.

[0005] In a first aspect, the present invention provides a method for measuring the deflection size of a prestressed buried pipe, comprising the following steps:

[0006] One or more pre-buried pipes are selected from N pre-buried pipes distributed circumferentially on the top surface of the wind turbine foundation as the pre-buried pipe to be measured, and a first positioning point and a second positioning point are selected on the inner edge of the upper opening and the inner edge of the lower opening of the pre-buried pipe to be measured, respectively; a plumb bob is lowered from the first positioning point into the pre-buried pipe to be measured, and the position where the plumb bob extends out of the lower opening of the pre-buried pipe to be measured is marked as the actual exit point; the distance between the theoretical exit point of the plumb bob and the second positioning point is calculated based on the length and inclination angle of the pre-buried pipe to be measured, and the theoretical exit point is laid out using a measuring instrument; the distance between the theoretical exit point and the actual exit point is measured using the measuring instrument to obtain the deflection of the pre-buried pipe to be measured.

[0007] Beneficial effects: The obtained deflection amount can be used to easily determine whether it is necessary to correct the pre-buried pipe under test. If corrective measures are needed for the pre-buried pipe under test, the protruding part of the pre-buried pipe under test can be prevented from interfering with the bottom of the concrete tower and the prestressed steel strands, so that the prestressed steel strands will not rub against the pre-buried pipes, ensuring that the prestress of the prestressed steel strands will not be lost and the anti-corrosion coating will not be worn, which is beneficial to improving the structural durability of the prestressed steel strands. At the same time, the prestressed steel strands will not squeeze the pipe mouth vibration reduction clustering device, steel pipes and surrounding concrete, and the prestressed steel strands can be vertically anchored to the anchor plate without causing tension deviation.

[0008] In an optional embodiment, in the step of "selecting one or more of the N embedded pipes distributed circumferentially on the top surface of the wind turbine foundation as the embedded pipes to be tested, and selecting the first positioning point and the second positioning point on the inner edge of the upper opening and the inner edge of the lower opening of the embedded pipe to be tested respectively", the first positioning point is the closest point between the inner edge of the upper opening of the embedded pipe to be tested and the inner wall of the mixing tower ring segment, and the second positioning point is the closest point between the inner edge of the lower opening of the embedded pipe to be tested and the side wall of the wind turbine foundation cavity.

[0009] Beneficial effect: By setting the first positioning point and the second positioning point as the closest point between the inner edge of the upper end of the embedded pipe to be measured and the inner wall of the mixing tower ring and the closest point between the inner edge of the lower end of the embedded pipe to be measured and the side wall of the wind turbine foundation cavity, respectively, this is equivalent to establishing a measurement coordinate system similar to a coordinate system, so that the positional relationship between the first positioning point and the second positioning point can be determined, and then when the first positioning point and the second positioning point are used to assist in measurement, the accuracy of the measurement results can be improved.

[0010] In an optional embodiment, in the step of "selecting one or more of the N embedded pipes distributed circumferentially on the top surface of the wind turbine foundation as the embedded pipes to be tested, and selecting the first positioning point and the second positioning point on the inner edge of the upper opening and the inner edge of the lower opening of the embedded pipe to be tested respectively", the second positioning point is the closest point to the side wall of the wind turbine foundation cavity on the opening on the anchor plate that abuts the lower opening of the embedded pipe to be tested, and the opening on the anchor plate has the same cross-sectional size as the embedded pipe to be tested.

[0011] Beneficial effect: The second positioning point is specifically the point on the opening of the anchor plate that abuts the lower end of the embedded pipe to be measured that is closest to the side wall of the wind turbine foundation cavity. At the same time, the opening on the anchor plate has the same cross-sectional size as the embedded pipe to be measured. In this way, the opening on the anchor plate is equivalent to an extension of the embedded pipe to be measured, which will not affect the measurement structure.

[0012] In an optional embodiment, in the step of "lowering the plumb bob from the first positioning point into the embedded pipe to be measured, and extending the plumb bob to the position at the lower end of the embedded pipe to be measured and marked as the actual exit point", in order to ensure that the plumb bob can extend out of the lower end of the embedded pipe to be measured, the length of the plumb bob is greater than the length of the embedded pipe to be measured.

[0013] Beneficial effect: By setting the length of the plumb bob to be greater than the length of the embedded pipe to be measured, when the plumb bob is lowered from the first positioning point into the embedded pipe to be measured, the plumb bob can be fully extended from the embedded pipe to be measured, thereby facilitating observation by staff when marking the actual exit point.

[0014] In an optional embodiment, in the step of "calculating the distance between the theoretical exit point of the plumb bob and the second positioning point based on the length and inclination angle of the pre-buried pipe to be measured, and staking out the theoretical exit point by a measuring instrument", the inclination angle of the pre-buried pipe to be measured is the angle between the axial center line of the pre-buried pipe to be measured and the plumb line, and the distance between the theoretical exit point and the second positioning point can be calculated by the formula To calculate;

[0015] In the formula, L is the length of the buried pipe to be measured, is the inclination angle of the embedded pipe being tested.

[0016] Beneficial effects: Through the formula To calculate the distance between the theoretical exit point and the second positioning point, the calculated distance can be used to compare with the distance between the actual exit point and the second positioning point. The result obtained after the comparison is the deflection of the embedded pipe under test.

[0017] In an optional embodiment, in the step of "calculating the distance between the theoretical exit point of the plumb bob and the second positioning point according to the length and inclination angle of the pre-buried pipe to be measured, and staking out the theoretical exit point by means of a measuring instrument", the measuring instrument is a ruler or a tape measure, and the theoretical exit point can be measured by extending the distance between the theoretical exit point and the second positioning point in the radial direction of the pre-buried pipe to be measured from the ruler or the tape measure with the second positioning point as the base point. and mark the position where the ruler or tape measure extends as the theoretical exit point.

[0018] Beneficial effect: The theoretical exit point is marked by using a ruler or a tape measure with the second positioning point as the reference and extending the length of the distance between the theoretical exit point and the second positioning point in the radial centripetal direction of the embedded pipe to be measured. In this way, the theoretical exit point can be marked to facilitate its continued use in subsequent measurements. At the same time, marking the theoretical exit point can intuitively observe the error between the theoretical exit point and the actual exit point, which is conducive to improving the efficiency of observing whether the embedded pipe to be measured has deflection.

[0019] In an optional embodiment, in the step of "measuring the distance between the theoretical exit point and the actual exit point by a measuring instrument to obtain the deflection of the embedded pipe under test", the measuring instrument is a ruler or a tape measure, and the distance between the theoretical exit point and the actual exit point can be measured by placing the ruler or tape measure against the anchor plate.

[0020] Beneficial effect: After the theoretical exit point and the actual exit point are marked, the distance between the theoretical exit point and the actual exit point can be measured by a ruler or a tape measure, and the measured result is the deflection of the embedded pipe being measured. During the measurement process, the ruler or tape measure can be placed against the anchor plate for measurement, thereby improving the measurement accuracy of the ruler or tape measure.

[0021] In an optional embodiment, the step of "measuring the distance between the theoretical exit point and the actual exit point by a measuring instrument to obtain the deflection of the embedded pipe under test" includes: if the distance between the theoretical exit point and the actual exit point is zero, then there is no deflection in the embedded pipe under test.

[0022] Beneficial effect: When measuring the distance between the theoretical exit point and the actual exit point, if the distance between the theoretical exit point and the actual exit point is zero, it indicates that there is no deflection of the measured embedded pipe, and thus the measured embedded pipe does not need to be adjusted.

[0023] In an optional embodiment, the step of "measuring the distance between the theoretical exit point and the actual exit point by a measuring instrument to obtain the deflection of the embedded pipe under test" further includes: if the distance between the theoretical exit point and the actual exit point is not zero, then there is a deflection in the embedded pipe under test, and it is necessary to further determine whether the deflection of the embedded pipe under test is within an allowable range. If it exceeds, corrective measures need to be taken.

[0024] Beneficial effect: When measuring the distance between the theoretical exit point and the actual exit point, if the distance between the theoretical exit point and the actual exit point is not zero, it indicates that the pre-buried pipe under test has a deflection, and thus the staff needs to judge whether the deflection of the pre-buried pipe under test is within the allowable range. If the deflection of the pre-buried pipe under test is within the allowable range, there is no need to correct the deflection of the pre-buried pipe under test. If the deflection of the pre-buried pipe under test exceeds the allowable range, it is necessary to take corrective measures for the pre-buried pipe under test, such as expanding the hole of the pre-buried pipe 4 under test to prevent interference between the prestressed steel strand and the pre-buried pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A top view of the pre-buried pipes and the layout points on the top surface of the wind turbine foundation according to a method for measuring the deflection size of prestressed buried pipes according to an embodiment of the present invention;

[0027] Figure 2 A cross-sectional view of a schematic diagram of laying out a prestressed buried pipe in a method for measuring the deflection size of a prestressed buried pipe according to an embodiment of the present invention;

[0028] Figure 3 A schematic diagram of positioning the theoretical outlet point of the lower pipe opening of a prestressed buried pipe in a method for measuring the deflection size of a prestressed buried pipe according to an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the deviation of the outlet point of the lower pipe of a prestressed buried pipe according to a method for measuring the deflection size of the prestressed buried pipe in an embodiment of the present invention.

[0030] Description of reference numerals:

[0031] 1-wind turbine foundation; 2-anchor plate; 3-plumb bob; 4-buried pipe under test; 41-first positioning point; 42-second positioning point; 43-actual outlet point; 44-theoretical outlet point; 5-mixed tower ring. DETAILED DESCRIPTION

[0032] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0033] The following combination Figures 1 to 4 , describing embodiments of the present invention.

[0034] According to an embodiment of the present invention, on the one hand, a method for measuring the deflection size of a prestressed buried pipe is provided, such as Figures 1 to 4As shown, the method includes the following steps: selecting one or more of the N pre-buried pipes distributed circumferentially on the surface of the wind turbine foundation 1 as the pre-buried pipe 4 to be measured, and selecting a first positioning point 41 and a second positioning point 42 on the inner edge of the upper opening and the inner edge of the lower opening of the pre-buried pipe 4 to be measured, respectively; lowering a hanging bob 3 from the first positioning point 41 into the pre-buried pipe 4 to be measured, and extending the hanging bob 3 to the position of the lower opening of the pre-buried pipe 4 to be measured is marked as an actual exit point 43; calculating the distance between a theoretical exit point 44 of the hanging bob 3 and the second positioning point 42 according to the length and inclination angle of the pre-buried pipe 4 to be measured, and staking out the theoretical exit point 44; and measuring the distance between the theoretical exit point 44 and the actual exit point 43 by a measuring instrument to obtain the deflection of the pre-buried pipe 4 to be measured.

[0035] The above-mentioned method for measuring the deflection size of prestressed buried pipes is to select one or more of the N prestressed buried pipes distributed in the circumferential direction of the pier in the wind turbine foundation 1 as the detection object, and select a first positioning point 41 and a second positioning point 42 on the inner edge of the upper end and the inner edge of the lower end of the prestressed buried pipe 4 to assist in the measurement. After the first positioning point 41 and the second positioning point 42 are selected, the hanging bob 3 can be lowered from the first positioning point 41 into the prestressed buried pipe 4 to be measured. After the hanging bob line extends out of the prestressed buried pipe 4 to be measured, the hanging bob 3 is extended out of the position of the lower end of the prestressed buried pipe 4 to be measured and marked as the actual exit point 43. Then, according to the length and inclination angle of the prestressed buried pipe 4 to be measured, the distance between the theoretical exit point 44 of the hanging bob line and the second positioning point 42 is calculated, and the theoretical exit point 44 is further laid out. Finally, the distance between the theoretical exit point 44 and the actual exit point 43 can be measured by a measuring instrument to obtain the deflection of the prestressed buried pipe 4 to be measured.

[0036] The obtained deflection amount is used to determine whether the pre-buried pipe 4 under test needs to be corrected; if necessary, corrective measures are taken on the pre-buried pipe 4 under test in a timely manner to prevent the protruding part of the pre-buried pipe 4 from interfering with the bottom of the concrete tower and preventing it from interfering with the prestressed steel strand, so that the prestressed steel strand will not rub against the pre-buried pipe; this can ensure that the prestress will not be lost and the anti-corrosion coating will not be worn, which is beneficial to improving the structural durability of the prestressed steel strand. At the same time, the prestressed steel strand will not squeeze the pipe mouth vibration reduction and clustering device, the steel pipe and the surrounding concrete, and the prestressed steel strand can be vertically anchored to the anchor plate 2 without causing tension deviation.

[0037] In one embodiment, Figure 1 and Figure 2As shown, in the step of "selecting one or more of the N embedded pipes distributed circumferentially on the surface of the wind turbine foundation 1 as the embedded pipe 4 to be tested, and selecting a first positioning point 41 and a second positioning point 42 on the inner edge of the upper opening and the inner edge of the lower opening of the embedded pipe 4 to be tested respectively", the first positioning point 41 is the closest point between the inner edge of the upper opening of the embedded pipe 4 to be tested and the inner wall of the mixing tower ring 5, and the second positioning point 42 is the closest point between the inner edge of the lower opening of the embedded pipe 4 to be tested and the side wall of the cavity of the wind turbine foundation 1.

[0038] The above-mentioned method for measuring the deflection size of prestressed buried pipes is to set the first positioning point 41 and the second positioning point 42 as the closest point between the inner edge of the upper end of the measured buried pipe 4 and the inner wall of the mixing tower ring 5 and the closest point between the inner edge of the lower end of the measured buried pipe 4 and the side wall of the cavity of the wind turbine foundation 1, respectively. In this way, it is equivalent to establishing a measurement coordinate system similar to a coordinate system, so that the positional relationship between the first positioning point 41 and the second positioning point 42 can be determined, and then when the first positioning point 41 and the second positioning point 42 are used to assist in measurement, the accuracy of the measurement results can be improved.

[0039] In one embodiment, Figure 2 As shown, in the step of "selecting one or more of the N embedded pipes distributed circumferentially on the top surface of the wind turbine foundation 1 as the embedded pipe 4 to be tested, and selecting the first positioning point 41 and the second positioning point 42 on the inner edge of the upper opening and the inner edge of the lower opening of the embedded pipe 4 to be tested respectively", the second positioning point 42 is the closest point to the inner wall of the cavity of the wind turbine foundation 1 on the opening of the hole on the anchor plate 2 that abuts the lower opening of the embedded pipe 4 to be tested, and the opening on the anchor plate 2 has the same cross-sectional size as the embedded pipe 4 to be tested.

[0040] In the above-mentioned method for measuring the deflection size of prestressed buried pipes, the second positioning point 42 is specifically the point on the opening of the anchor plate 2 that abuts the lower end of the buried pipe 4 to be measured, which is closest to the inner wall of the cavity of the wind turbine foundation 1. At the same time, the opening on the anchor plate 2 has the same cross-sectional size as the buried pipe 4 to be measured. In this way, the opening on the anchor plate 2 is equivalent to an extension of the buried pipe 4 to be measured, which will not affect the measurement structure.

[0041] In one embodiment, Figure 2 and Figure 4 As shown, in the step of "lowering the plumb bob 3 from the first positioning point 41 into the embedded pipe 4 to be tested, and extending the plumb bob 3 to the position of the lower end of the embedded pipe 4 to be tested and marked as the actual exit point 43", in order to ensure that the plumb bob 3 can extend out of the lower end of the embedded pipe 4 to be tested, the length of the plumb bob 3 is greater than the length of the embedded pipe 4 to be tested.

[0042] The above-mentioned method for measuring the deflection size of prestressed buried pipes is to set the length of the plumb bob 3 to be greater than the length of the pre-buried pipe 4 to be measured, so that when the plumb bob 3 is lowered from the first positioning point 41 into the pre-buried pipe 4 to be measured, the plumb bob 3 can be fully extended from the pre-buried pipe 4 to be measured, thereby facilitating observation by staff when marking the actual exit point 43.

[0043] In one embodiment, Figure 2 As shown, in the step of "calculating the distance between the theoretical exit point 44 of the plumb bob 3 and the second positioning point 42 according to the length and inclination angle of the pre-buried pipe 4 to be measured, and staking out the theoretical exit point 44 by a measuring instrument", the inclination angle of the pre-buried pipe 4 to be measured is the angle between the axial center line of the pre-buried pipe 4 to be measured and the plumb line, and the distance between the theoretical exit point 44 and the second positioning point 42 can be calculated by the formula To calculate; in the formula, L is the length of the embedded pipe 4 to be tested, is the inclination angle of the embedded pipe 4 to be tested.

[0044] The above-mentioned method for measuring the deflection size of prestressed buried pipes is based on the formula The distance between the theoretical exit point 44 and the second positioning point 42 is calculated, and then the theoretical exit point 44 is further laid out. The distance between the actual exit point 43 and the theoretical exit point 44 is measured to obtain the deflection of the embedded pipe 4 under test.

[0045] In one embodiment, Figure 3 As shown, in the step of "calculating the distance between the theoretical exit point 44 of the hanging wire bob 3 and the second positioning point 42 according to the length and the inclination angle of the embedded pipe 4 to be measured, and staking out the theoretical exit point 44 by a measuring instrument", the measuring instrument is a ruler or a tape measure, and the theoretical exit point 44 can be extended by the ruler or the tape measure along the radial centripetal direction of the embedded pipe 4 to be measured with the second positioning point 42 as the base point to the length of the distance between the theoretical exit point 44 and the second positioning point 42, and the length position where the ruler or the tape measure is extended is marked as the theoretical exit point 44.

[0046] The above-mentioned method for measuring the deflection size of the prestressed buried pipe is to mark the theoretical exit point 44 by using a ruler or a tape measure with the second positioning point 42 as the reference and extending the length of the distance between the theoretical exit point 44 and the second positioning point 42 in the radial centripetal direction of the pre-buried pipe 4 to be measured. In this way, the theoretical exit point 44 can be marked to facilitate its continued use in subsequent measurements. At the same time, marking the theoretical exit point 44 can intuitively observe the error between the theoretical exit point 44 and the actual exit point 43, which is conducive to improving the efficiency of observing whether the pre-buried pipe 4 to be measured has a deflection.

[0047] In one embodiment, Figure 3 and Figure 4As shown, in the step of "measuring the distance between the theoretical exit point 44 and the actual exit point 43 by a measuring instrument to obtain the deflection of the embedded pipe 4 under test", the measuring instrument is a ruler or a tape measure, and the distance between the theoretical exit point 44 and the actual exit point 43 can be measured by placing the ruler or tape measure against the anchor plate 2.

[0048] The above-mentioned method for measuring the deflection size of the prestressed buried pipe, after the theoretical exit point 44 and the actual exit point 43 are marked, can use a ruler or tape measure to measure the distance between the theoretical exit point 44 and the actual exit point 43, and the measured result is the deflection of the measured pre-buried pipe 4. During the measurement process, the ruler or tape measure can be placed against the anchor plate 2 for measurement, so that the measurement accuracy of the ruler or tape measure can be improved.

[0049] In one embodiment, Figure 3 and Figure 4 As shown, the step of "measuring the distance between the theoretical exit point 44 and the actual exit point 43 by a measuring instrument to obtain the deflection of the embedded pipe 4 under test" includes: if the distance between the theoretical exit point 44 and the actual exit point 43 is zero, then there is no deflection of the embedded pipe 4 under test.

[0050] In the above-mentioned method for measuring the deflection size of the prestressed buried pipe, when measuring the distance between the theoretical exit point 44 and the actual exit point 43, if the distance between the theoretical exit point 44 and the actual exit point 43 is zero, it indicates that there is no deflection of the measured buried pipe 4 and there is no need to adjust the measured buried pipe 4.

[0051] In one embodiment, Figure 4 As shown, the step of "measuring the distance between the theoretical exit point 44 and the actual exit point 43 by a measuring instrument to obtain the deflection of the embedded pipe 4 under test" also includes: if the distance between the theoretical exit point 44 and the actual exit point 43 is not zero, then the embedded pipe 4 under test has a deflection, and it is necessary to further determine whether the deflection of the embedded pipe 4 under test is within the allowable range. If it exceeds, corrective measures need to be taken.

[0052] In the above-mentioned method for measuring the deflection size of prestressed buried pipes, when measuring the distance between the theoretical exit point 44 and the actual exit point 43, if the distance between the theoretical exit point 44 and the actual exit point 43 is not zero, it indicates that the measured pre-buried pipe 4 has a deflection, and thus the staff needs to determine whether the deflection of the measured pre-buried pipe 4 is within the allowable range. If the deflection of the measured pre-buried pipe 4 is within the allowable range, there is no need to correct the deflection of the measured pre-buried pipe 4. If the deflection of the measured pre-buried pipe 4 exceeds the allowable range, it is necessary to take corrective measures for the measured pre-buried pipe 4, such as: expanding the hole of the measured pre-buried pipe 4 to prevent interference between the prestressed steel strand and the pre-buried pipe.

[0053] Specifically, the allowable range of the deflection of the pre-buried pipe 4 to be tested needs to be determined based on various data during the construction process of the mixed tower fan. Due to various errors in the construction process of the mixed tower fan, the pre-buried pipe 4 to be tested has an allowable range of deflection during installation. This application only provides a method for measuring the deflection size of the pre-buried pipe 4 to be tested, so as to determine whether corrective measures need to be taken on the pre-buried pipe.

[0054] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A method for measuring the deflection size of a prestressed buried pipe, characterized in that: The steps include: One or more of the N pre-buried pipes distributed circumferentially on the top surface of the wind turbine foundation (1) are selected as the pre-buried pipe (4) to be tested, and a first positioning point (41) and a second positioning point (42) are selected from the inner edge of the upper opening and the inner edge of the lower opening of the pre-buried pipe (4) to be tested, respectively; a plumb bob (3) is lowered from the first positioning point (41) into the pre-buried pipe (4) to be tested, and the position where the plumb bob (3) extends out of the lower opening of the pre-buried pipe (4) to be tested is marked as the actual exit point (43); the distance between the theoretical exit point (44) of the plumb bob (3) and the second positioning point (42) is calculated according to the length and inclination angle of the pre-buried pipe (4) to be tested, and the theoretical exit point (44) is laid out by a measuring instrument; the distance between the theoretical exit point (44) and the actual exit point (43) is measured by a measuring instrument to obtain the deflection of the pre-buried pipe (4) to be tested; In the step of "selecting one or more of the N pre-buried pipes distributed in the annular direction on the top surface of the fan foundation (1) as the pre-buried pipe to be tested (4), and selecting a first positioning point (41) and a second positioning point (42) on the inner edge of the upper opening and the inner edge of the lower opening of the pre-buried pipe to be tested (4), respectively", the first positioning point (41) is the closest point between the inner edge of the upper opening of the pre-buried pipe to be tested (4) and the inner wall of the mixing tower ring (5), and the second positioning point (42) is the closest point between the inner edge of the lower opening of the pre-buried pipe to be tested (4) and the side wall of the cavity of the fan foundation (1); In the step of "selecting one or more of the N pre-buried pipes distributed circumferentially on the top surface of the wind turbine foundation (1) as the pre-buried pipe (4) to be tested, and selecting a first positioning point (41) and a second positioning point (42) on the inner edge of the upper opening and the inner edge of the lower opening of the pre-buried pipe (4) to be tested respectively", the second positioning point (42) is the closest point on the opening of the anchor plate (2) that abuts the lower opening of the pre-buried pipe (4) to the side wall of the cavity of the wind turbine foundation (1), and the opening on the anchor plate (2) has the same cross-sectional size as the pre-buried pipe (4) to be tested.

2. The method for measuring the deflection size of prestressed buried pipes according to claim 1, characterized in that: In the step of "lowering the plumb bob (3) from the first positioning point (41) into the pre-buried pipe (4) to be tested, and extending the plumb bob (3) to the position of the lower end of the pre-buried pipe (4) to be tested, and marking it as the actual exit point (43)", in order to ensure that the plumb bob (3) can extend to the lower end of the pre-buried pipe (4) to be tested, the length of the plumb bob (3) needs to be greater than the length of the pre-buried pipe (4) to be tested.

3. The method for measuring the deflection size of a prestressed buried pipe according to claim 2, characterized in that: In the step of "calculating the distance between the theoretical exit point (44) of the plumb bob (3) and the second positioning point (42) based on the length and the inclination angle of the pre-buried pipe (4) to be measured, and staking out the theoretical exit point (44) by a measuring instrument", the inclination angle of the pre-buried pipe (4) to be measured is the angle between the axial center line of the pre-buried pipe (4) to be measured and the plumb line, and the distance between the theoretical exit point (44) and the second positioning point (42) can be calculated by the formula To calculate; In the formula, L is the length of the embedded pipe (4) to be measured, is the inclination angle of the embedded pipe (4) to be tested.

4. The method for measuring the deflection size of a prestressed buried pipe according to claim 3, characterized in that: In the step of "calculating the distance between the theoretical exit point (44) of the plumb bob (3) and the second positioning point (42) according to the length and the inclination angle of the pre-buried pipe (4) to be measured, and staking out the theoretical exit point (44) by means of a measuring instrument", the measuring instrument is a ruler or a tape measure, and the theoretical exit point (44) can be measured by the ruler or the tape measure with the second positioning point (42) as the base point along the radial direction of the pre-buried pipe (4) to be measured, and the distance between the theoretical exit point (44) and the second positioning point (42) is calculated. and mark the position where the ruler or tape measure extends as the theoretical exit point (44).

5. The method for measuring the deflection size of prestressed buried pipes according to claim 1, characterized in that: In the step of "measuring the distance between the theoretical exit point (44) and the actual exit point (43) by a measuring instrument, the deflection amount of the measured embedded pipe (4) can be obtained", the measuring instrument is a ruler or a tape measure, and the distance between the theoretical exit point (44) and the actual exit point (43) can be measured by placing the ruler or the tape measure against the anchor plate (2).

6. The method for measuring the deflection size of prestressed buried pipes according to claim 5, characterized in that: The step of "measuring the distance between the theoretical exit point (44) and the actual exit point (43) by a measuring instrument to obtain the deflection of the pre-buried pipe (4) under test" includes: if the distance between the theoretical exit point (44) and the actual exit point (43) is zero, then the pre-buried pipe (4) under test does not have any deflection.

7. The method for measuring the deflection size of a prestressed buried pipe according to claim 6, characterized in that: The step of "measuring the distance between the theoretical exit point (44) and the actual exit point (43) by a measuring instrument to obtain the deflection amount of the pre-buried pipe (4) under test" further includes: if the distance between the theoretical exit point (44) and the actual exit point (43) is not zero, then the pre-buried pipe (4) under test has a deflection amount, and it is necessary to further determine whether the deflection amount of the pre-buried pipe (4) under test is within an allowable range. If it exceeds the allowable range, correction measures need to be taken.

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