Dome tension platform foundation inclined screw positioning inspection and installation method

Abstract

This invention discloses a method for positioning, checking, and installing inclined screws on the foundation of a dome tensioning platform, belonging to the field of building construction. The positioning and checking method employs two coordinate transformations: the coordinate system is transformed to have the center point of the foundation on the dome as the origin, the direction parallel to the central axis of the screw as the H-axis, and the direction perpendicular to the central axis of the buttress column as the B-axis; then, the C-axis direction is determined according to the right-hand rule. Under this coordinate system, the installation position of the screw can be visually judged as qualified. The installation method uses the positioning and checking method of this invention, installing no less than four support rods, two first angle steels and two second angle steels, as well as a reinforcing frame and reinforcing bars on the dome pouring layer to achieve the positioning and installation of the screw. This installation method is simple, reliable, and can quickly, conveniently, and accurately install the screw.

Description

Technical Field

[0001] This invention patent belongs to the field of building construction technology, specifically relating to a method for positioning and installing inclined screws on the foundation of a dome tensioning platform. Background Technology

[0002] The inner safety shell and inner dome of the nuclear power plant reactor building are equipped with prestressed structures. During prestressing construction, a tensioning platform needs to be set up. The tensioning platform is fixed by bolts pre-embedded during construction. Some bolts located in the dome are parallel to the buttress columns, perpendicular to the tangent of the dome, and form a certain angle with the plane. The position of the buttress columns is at a certain angle with the coordinate system. Therefore, bolt adjustment is different from conventional planar bolt installation measurement and control. In traditional installation, the theoretical three-dimensional coordinates of the top need to be calculated in advance. During on-site installation and adjustment, repeated measurements and adjustments are required. It is not possible to intuitively provide values ​​that are easy to control and adjust, making the installation work time-consuming and labor-intensive, and the accuracy is not easy to guarantee. Summary of the Invention

[0003] The purpose of this invention is to solve the problems mentioned in the background art and to provide a method for checking and installing the inclined screw of the foundation of a dome tensioning platform. This method can intuitively determine whether the installation position of the foundation screw of the tensioning platform is correct and can effectively and reliably install the foundation screw of the tensioning platform into the correct position.

[0004] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows:

[0005] A method for locating and inspecting the inclined screws of a dome tensioning platform foundation includes a dome, buttresses located on the bottom surface of the dome and passing through the dome, tensioning platform foundation screws located on both sides of the buttresses and parallel to the vertical planes passing through the buttresses, and a foundation center point located on the upper surface of the dome for locating the screws. The screws are located on the dome, and the coordinates of the foundation center point are (X0, Y0, Z0). The method is characterized by: firstly, the horizontal plane coordinates (X, Y) of the three-dimensional coordinates (X, Y, Z) of the measurement points on the dome are determined using a formula...

[0006] A = (XX) q )cosα+(YY q sinα

[0007] B = -(XX) q )sinα+(YY q cosα

[0008] Convert to a two-dimensional coordinate system (A,B) with the center of the dome's base as the origin O′, the direction parallel to the buttress columns as the A axis, and the direction perpendicular to the buttress columns as the B axis.

[0009] Where X q Y qα is the horizontal coordinate of the center of the dome's base; α is the angle between the central axis of the buttress column and the positive direction of the X-axis; X and Y are the horizontal coordinates of the measurement point; A and B are the X and Y coordinates after transformation.

[0010] After the above transformation, the three-dimensional coordinates of the measurement point on the dome become (A, B, Z). Then, the vertical plane coordinates (A, Z) of the measurement point on the dome are obtained using the formula...

[0011]

[0012]

[0013] H=(Z-Z0)cosθ+(A-A0)sinθ

[0014] C = -(Z - Z0)sinθ + (A - A0)cosθ

[0015] Convert to: a two-dimensional coordinate system (C,H) with the orthographic projection of the base center point onto the vertical plane passing through the measurement point on the dome as the origin O″; the direction parallel to the screw's central axis as the H axis and the direction perpendicular to the screw's central axis as the C axis;

[0016] Where Z0 and A0 are the coordinates of the basic center point in the new coordinate system after the first coordinate transformation; Z and A are the coordinates of the measurement points on the dome in the new coordinate system after the first coordinate transformation. q Let β be the elevation of the dome's base surface, and let β be the angle between the line connecting the orthographic projection of the foundation center point in the AOˊZ plane and O′ and the A-axis. This angle β is also the angle formed by the screw's central axis and the horizontal plane; θ is the angle by which the Z-axis is rotated clockwise to the direction of the screw's central axis.

[0017] After the above two coordinate transformations, the coordinates of the foundation center point become (0, B0, 0), and the coordinates of the measuring point on the dome become (C, B, H), where B0 is the B-axis coordinate value of the foundation center point after the first coordinate transformation; the screw has a specified distance from the foundation center in the C, B, and H directions. By measuring the three-dimensional coordinates on the screw and then through the above two coordinate transformations, it is possible to intuitively determine whether the screw meets the installation requirements.

[0018] A method for positioning and installing inclined screws on the foundation of a dome tensioning platform, characterized in that: using the positioning inspection method described in the claims, at least four support rods are fixed on the reinforcing steel skeleton of the dome casting layer, the support rods being parallel to the inclined direction of the screw; a first angle steel is fixed between the support rods, the back of the first angle steel facing upwards, a second angle steel is fixed on the upper surface of the first angle steel, the back of the second angle steel facing downwards, the screw is fixed on the upper surface of the lower side of the second angle steel, and the position of the reinforcing steel skeleton of the dome casting layer is staggered from the screw, the first angle steel and the second angle steel.

[0019] Preferably, the support rod is located around the screw, and a first angle steel is fixed between adjacent support rods in the B-axis or C-axis direction.

[0020] Preferably, the upper side of the first angle steel is perpendicular to the support rod, and the absolute value of the H coordinate of the upper surface of the upper side of the first angle steel is equal to the H coordinate of the bottom end face of the screw plus the thickness of the second angle steel.

[0021] Preferably, the upper surface H coordinate of the lower side of the second angle steel is equal to the H coordinate of the bottom end face of the screw, and the edge of the screw is in contact with the upper side of the second angle steel.

[0022] Preferably, the upper side of the first angle steel is perpendicular to the upper side of the second angle steel.

[0023] Preferably, the screw is fixed on the lower side of the second angle steel at a preset distance from the center point of the foundation.

[0024] Preferably, at the contact point between the screw and the upper surface of the dome, a reinforcing steel bar is provided parallel to the upper side of the second angle steel and abuts against the edge of the screw. The reinforcing steel bar and the second angle steel are located on opposite sides of the screw.

[0025] Preferably, a reinforcing frame is provided at the bottom of the screw, the reinforcing frame has a square opening slot, the side length of the square opening slot is equal to the outer diameter of the screw, and the reinforcing frame is fixed to the two sides of the second angle steel.

[0026] Preferably, the square opening slot is provided with a positioning steel plate that matches its shape, and the square opening slot and the positioning steel plate are slidably engaged, with the positioning steel plate used to position the square opening slot.

[0027] The beneficial effects of this invention are:

[0028] 1. The problem of intuitively determining the spatial and planar positions of the screws in the three-dimensional structure of the dome was solved through the first coordinate transformation;

[0029] 2. The second coordinate transformation solved the problem of intuitively judging the spatial and elevation positions of the screws in the three-dimensional structure of the dome;

[0030] 3. By installing support rods, angle steel, and reinforcing frames, the problem of not being able to directly locate and measure the spatial position of the tensioning platform foundation bolts inside the dome and achieve precise positioning and installation was effectively solved;

[0031] 4. By setting the positioning steel plate, the position of the reinforcement frame can be directly located, thereby positioning the bottom end of the screw. This is much simpler and more convenient than positioning the bottom end of the screw on the angle steel. It not only improves work efficiency but also ensures the accuracy of screw positioning and guarantees construction quality.

[0032] 5. Coordinate transformation reduces the workload of surveyors in indoor calculations and increases work efficiency several times over, providing an effective guarantee for construction quality.

[0033] 6. This patent facilitates measurement work, optimizes project progress, ensures stable and reliable measurement quality, and allows for flexible inspection and convenient measurement. Attached Figure Description

[0034] Figure 1 Top view of screw arrangement;

[0035] Figure 2 A top view of the screw arrangement after the first coordinate transformation;

[0036] Figure 3 A front sectional view of the screw arrangement at the foundation center point e after the first coordinate transformation;

[0037] Figure 4 A front sectional view of the screw arrangement at the foundation center point e after the second coordinate transformation;

[0038] Figure 5 Schematic diagram of screw installation in the dome pouring layer;

[0039] Figure 6 A partially enlarged schematic diagram of the screw arrangement;

[0040] Figure 7 Schematic diagram of screw mounting bracket and reinforcement method from the top;

[0041] Figure 8 Schematic diagram of the top surface of the screw mounting bracket and reinforcement method 2;

[0042] Figure 9 A schematic diagram of the screw mounting bracket and reinforcement from the front;

[0043] Figure 10 Schematic diagram of screw mounting bracket and reinforcement side;

[0044] Figure 11 Schematic diagram of the reinforced frame;

[0045] Figure 12 1. Schematic diagram of positioning steel plate.

[0046] The following are the reference numerals in the instruction manual: 1. Screw, 2. Support rod, 3. First angle steel, 4. Second angle steel, 5. Reinforcing steel bar, 6. Reinforcing frame, 7. Square opening slot, 8. Positioning steel plate, 9. Foundation center point, 10. Top surface of the dome, 11. Bottom surface of the dome, 12. Buttress column, 13. Secondary grid. Detailed Implementation

[0047] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0048] It should be noted that the terms such as "upper", "lower", "left", "right", "front", and "back" used in the invention are only for clarity of description and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0049] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings:

[0050] like Figure 1 As shown, the dome of a nuclear power plant reactor building has the following coordinates in the initial coordinate system: the horizontal coordinates of the center of the dome's base are (3000, 7000). Note that the unit of these coordinates is mm. The inner diameter of the dome is 22m, the thickness of the cast-in-place layer is 1m, and the elevation of the bottom of the dome is +48.600m. The lower right end of buttress 12 is located at 120° on the X-axis of the initial coordinate system. Buttress 12 is a square column with a base side length of 1.947m. Screws 1 are located on both sides of the central axis along the length of buttress 12. The screw rod 1 is symmetrically arranged at both ends; it is parallel to the vertical plane passing through the central axis of the buttress column 12 and has a certain angle with the horizontal plane. Due to the inclined state of the screw rod 1, the installation measurement control, measurement data indoor calculation, and field measurement deviation calculation cannot be intuitively determined, which affects the installation accuracy and progress of the screw rod. To solve these problems, the following will solve the installation measurement difficulties through two coordinate transformations, installation of support rods, angle steel, reinforcement bars and reinforcement frames. The perfection of the measurement control work will directly affect the project quality and construction progress.

[0051] First, the horizontal coordinates (X, Y) of the three-dimensional coordinates (X, Y, Z) of the measurement point on the dome are obtained using the formula...

[0052] A = (XX) q )cosα+(YY q sinα

[0053] B = -(XX) q )sinα+(YY q cosα

[0054] Convert to a two-dimensional coordinate system (A, B) with the center of the dome's base as the origin O′, the direction parallel to buttress 12 as the A-axis, and the direction perpendicular to buttress 12 as the B-axis.

[0055] Where X q Y q Let X be the horizontal coordinate of the center of the dome's base. q Y q3000 and 7000 respectively; α is the angle between the central axis of the buttress column 12 and the positive direction of the X-axis, which is 300° in this embodiment; X and Y are the horizontal coordinates of the measurement point, and A and B are the X and Y coordinates after transformation;

[0056] After the above transformation, the three-dimensional coordinates of the measurement point on the dome become (A, B, Z), and the XOY coordinate system is transformed as follows: Figure 2 The AOB coordinate system shown;

[0057] Then, as Figure 3 The vertical plane coordinates (A, Z) of the measurement point on the dome shown are obtained using the formula...

[0058]

[0059]

[0060] H=(Z-Z0)cosθ+(A-A0)sinθ

[0061] C = -(Z - Z0)sinθ + (A - A0)cosθ

[0062] Convert to Figure 4 As shown: The coordinate origin O″ is the orthographic projection of the foundation center point onto the vertical plane passing through the measurement point on the dome; the direction parallel to the screw's central axis is the H-axis, and the direction perpendicular to the screw's central axis is the C-axis; the two-dimensional coordinates (C,H) are:

[0063] Where Z0 and A0 are the coordinates of the basic center point in the new coordinate system after the first coordinate transformation; Z and A are the coordinates of the measurement points on the dome in the new coordinate system after the first coordinate transformation. q The elevation of the dome's base is +48.600m in this embodiment. β is the angle between the line connecting the orthographic projection of the base center point in the AOˊZ plane and O′, and the A-axis. This angle β is also the angle between the screw's central axis and the horizontal plane. θ is the angle by which the Z-axis is rotated counterclockwise to the direction of the screw's central axis.

[0064] The following example of screw installation illustrates the coordinate system transformation. A schematic diagram of screw 1's installation in the dome's cast-in-place layer is shown below. Figure 5 As shown;

[0065] Before explaining the specific installation steps, let's first introduce the positioning rules for screw 1. The installation of screw 1 depends on the center point 9 of the foundation, such as... Figure 2 As can be seen, several foundation center points 9 are set on the upper surface of the dome, and the screw 1 is at a fixed distance from the foundation center points 9;

[0066] like Figure 6-8 As shown, with Figure 1Taking the foundation center point 9 on the upper right side as an example, there are 4 foundation center points 9, namely points e, f, g, and h. The distances of these four points from the central axis of the buttress column 12 and their relative elevations to the ground are 4.027m and +66.661m; 4.827m and +66.536m; 5.067m and +66.978m; and 5.517m and +67.535m, respectively. The positioning method for screw 1 at points e and f is as follows: the foundation center point 9 is located at the midpoint of the median of the base of an isosceles triangle, the central axis of screw 1 passes through the three vertices of the triangle, the height corresponding to the base of the triangle is 250mm, and the base length is 250mm. The positioning method for screw 1 at points g and h is as follows: with the foundation center point 9 as the center point of a rectangle, the length and width of the rectangle at point g are 450mm and 300mm respectively, the longer side is parallel to the central axis of the buttress column 12, and the rectangle at point h is a square with a side length of 370mm, its left and right sides are parallel to the central axis of the buttress column 12, and the central axis of screw 1 passes through the four vertices of the rectangle. Note that... Figure 6 Except for elevation, which is in meters (m), all other length units are in millimeters (mm).

[0067] The following example, using point e in the aforementioned foundation center point 9, illustrates the positioning and installation method of the screw (positional errors in all directions must be controlled within 2mm):

[0068] Step 1: Determining the theoretical three-dimensional coordinates of the foundation center point 9:

[0069] The foundation center point 9 is 4.027m from the center axis of the buttress column 12, with an elevation of +66.661m. The elevation of the dome bottom surface is +48.600m. The bolt 1 has a diameter of 28mm, is embedded 250mm into the dome concrete layer, and has a length of 125mm protruding from the upper surface of the dome.

[0070] After the first coordinate transformation, the B coordinate of the base center point 9 is 4.027, and the Z coordinate is 66.661.

[0071] The coordinates of A are then determined:

[0072] The radius R1 of the circle of the vertical section at a distance of 4.027m from the center axis of the buttress 12 from the dome:

[0073] R1 = SQRT(23) 2 -4.027 2 ) = 22.6447m

[0074] The distance A1 from the base center point 9 to the B-axis is:

[0075] A0 = SQRT(22.6447) 2 -(66.661-48.6) 2 ) = 13.6595m;

[0076] The three-dimensional coordinates of the foundation center point 9 are (±13.6595, 4.027, 66.661).

[0077] Step 2: Selection of measurement control points and their coordinate transformation:

[0078] Three secondary grid points 13 with a line of sight were selected as control points, and their initial coordinates in the horizontal plane are:

[0079] SC04(3035.2537, 6947.7935),

[0080] SC01(3037.1331,7039.4180),

[0081] SC02(2971.5175,7047.5366)

[0082] SC04 performs horizontal coordinate transformation:

[0083] A=(3035.2537-3000)COS300°+(6947.7935-7000)SIN300°=62.8390

[0084] B=-(3035.2537-3000)SIN300°+(6947.7935-7000)COS300°=4.4273

[0085] Similarly, convert SC01 and SC02.

[0086] The transformed coordinates are:

[0087] SC04 (62.8390, 4.4273),

[0088] SC01 (-15.5704, 51.8672),

[0089] SC02 (-55.4092, -0.8983)

[0090] Note that the coordinate units for the secondary grid points above are all in meters after conversion, while the coordinate units before conversion are in millimeters.

[0091] Step 3: Measurement of coordinates for positioning the foundation center point 9:

[0092] Set up a total station at control point SC02, input the coordinates of the station and target after horizontal transformation, then aim at control point SC01, set the instrument elevation, and set up a prism at the center point 9 of the foundation to be set. Measure the coordinates (-13.0151, 3.5654, 66.0576).

[0093] Step 4: Determine the foundation centerline along axis A:

[0094] B-axis positional deviation: δB = 4.027 - 3.5654 = 0.4616

[0095] Move 0.4616m in the positive direction of the B-axis to obtain the position in the parallel direction, and remeasure; the coordinates are (-13.0178, 4.0283, 66.0667);

[0096] New coordinate B position offset: δB = 4.027 - 4.0283 = -0.0013

[0097] The error is less than 2mm, which meets the requirements. Mark point B11 in direction B.

[0098] Select another point along the positive direction of the B-axis from the original center point 9. Measure the coordinates of this point: (-13.2565, 4.0012, 65.8766).

[0099] δB = 4.027 - 4.0012 = 0.015

[0100] Move 0.015 units away from the buttress column 12 to obtain the parallel direction point, and remeasure; the coordinates are (-13.2577, 4.0273, 65.8769);

[0101] Position deviation at point B: δB = 4.027 - 4.0273 = -0.0003

[0102] The error is less than 2mm, which meets the requirements. Mark point B12 in direction B.

[0103] The line drawn connecting points B11 and B12 is the foundation center point 9, the foundation center line in the direction of axis A;

[0104] Step 5: Vertical plane position coordinate transformation to determine the foundation centerline in the B-axis direction:

[0105] A measurement point is randomly selected in the negative direction of the B-axis at the base center point 9. The coordinates of the measurement point are (-13.1394, 3.6024, 65.9385).

[0106] β=artg((66.661-48.6) / 13.6595)=52.8999°

[0107] The coordinate system transformation angle θ = 3 / 2 × 180° + 52.8999° = 322.8999°

[0108] Z0 = 66.661, A0 = -13.6595

[0109] H=(65.9385-66.661)COS322.8999°+(-13.1394-(-13.6595))SIN322.8999°=-0.8900

[0110] C=-(65.9385-66.661)SIN322.8999°+(-13.1394-(-13.6595))COS52.8999°=-0.0210

[0111] Moving 0.0210 units along axis A towards the center of the dome, the coordinates of the point are remeasured to obtain (-13.1574, 3.6102, 65.9996).

[0112] H=(65.9996-66.661)COS322.8999°+(-13.1574-(-13.6595))SIN322.8999°=-0.8304

[0113] C=-(65.9996-66.661)SIN52.8999°+(-13.1574-(-13.6595))COS52.8999°=0.0015

[0114] Mark point C11 in direction C;

[0115] At the base center point 9, select another point on the positive direction of the B-axis and measure its coordinates (-13.1576, 4.5021, 65.9974).

[0116] H=(65.9974-66.661)COS322.8999°+(-13.1576-(-13.6595))SIN322.8999°=-0.8320

[0117] C=-(65.9974-66.661)SIN52.8999°+(-13.1576-(-13.6595))COS52.8999°=0.0017

[0118] Mark point C12 in direction C;

[0119] The line drawn connecting points C11 and C12 is the basic center point 9, the basic center line in the direction of axis B;

[0120] The line connecting the centers of the foundation along axes C and B is the positioning crosshair for foundation center point 9, and the intersection of the crosshairs is the location of foundation center point 9.

[0121] Step Six: Tie the lower reinforcement bars of the dome

[0122] That is, to tie the reinforcing bars of the dome pouring layer located below screw rod 1. Before tying, first determine the position of screw rod 1:

[0123] At the selected foundation center point e, the installation method for the screw has been explained before the installation steps, such as... Figure 6 As shown, the central axes of the two screw rods 1 located on the base of the triangle are both 0.125m away from the foundation center point 9 in the B-axis and C-axis directions; the screw rod 1 located at the vertex of the triangle is 0.125m away from the foundation center point 9 in the C-axis direction and 0m away in the B-axis direction; the screw rod 1 is embedded 0.250m deep into the upper surface of the dome, and the length exposed on the outer surface of the dome is 0.125m; according to the coordinates of the center of the bottom face of the three screw rods 1 after the second conversion, they are (0.125, 4.027, -0.250), (-0.125, 3.902, -0.250), and (-0.125, 4.152, -0.250), with an error of 0 to -2mm; the position of the reinforcing steel bar avoids the position of the screw rod 1;

[0124] Step 7: Install the prestressed pipes in the intermediate layer of the reinforcing bars and check that they meet the requirements;

[0125] The following steps are as follows Figure 8-10 As shown,

[0126] Step 8: Install support rod 2

[0127] Four support rods 2 are inserted according to the position. The support rods 2 are steel cylinders. The central axis of the support rod 2 is parallel to the central axis of the screw rod. The plane determined by the central axes of the two adjacent support rods 2 is parallel to the BO″H plane. The plane determined by the central axes of the two adjacent support rods 2 is parallel to the CO″H plane. The four support rods 2 are located on the periphery of the screw rod 1 and are welded to the reinforcing steel of the dome pouring layer. The specific positioning method is to first measure the center coordinates of the bottom and top ends, and then use the coordinate system transformed twice to repeatedly adjust in the corresponding axis direction so that the center coordinates B of the top end of the adjacent support rods 2 on the left and right are equal to the center coordinates B of the bottom end, and the center coordinates C of the top end of the adjacent support rods 2 on the front and back are equal to the center coordinates C of the bottom end. The specific positioning method can refer to the positioning method of the foundation center point 9.

[0128] Step 9: Install the first angle steel 3, the angle steel model is ∠50×5

[0129] The first angle steel 3 is welded to two adjacent support rods 2 on the left and right sides (in this embodiment, it is welded to the two adjacent support rods 2 on the left and right sides, but it can also be welded to the two adjacent support rods 2 on the front and back). Two first angle steels 3 are installed, with the back of the first angle steel 3 facing up and the side welded to the support rod 2. The relative elevation error between the upper surface of the first angle steel 3 and the center point 9 of the foundation is controlled within 0 to -2 mm. The following explains how to locate the installation position of the first angle steel 3 on the support rod 2:

[0130] Select one of the contact points between the upper surface of the first angle steel 3 and the support rod 2, and measure the coordinates (-13.3023, 3.8095, 66.5600).

[0131] Perform a second coordinate transformation:

[0132] H=(66.5600-66.661)COS322.8999°+(-13.3023-(-13.6595))SIN322.8999°=-0.2960

[0133] C=-(66.5600-66.661)SIN52.8999°+(-13.3023-(-13.6595))COS52.8999°=0.02240

[0134] ΔH=HH bottom=-0.2960-(-0.255)=-0.041

[0135] Where H_base is the distance from the bottom end face of screw 1 to the center point 9 of the foundation in the H direction + the thickness of the second angle steel 4. In this embodiment, the thickness of the second angle steel is 5mm. Since H_base represents the distance from the center point 9 of the foundation in the negative direction of the H axis, it should be a negative value, that is, H_base = -(0.250 + 0.005) = -0.255.

[0136] ΔH does not meet the 2mm error range and needs further adjustment;

[0137] The first angle steel measuring point 3 was moved 0.041mm towards the top of the dome, and the coordinates of the measuring point were obtained again (-13.3270, 3.8178, 66.5927). Coordinate transformation was then performed.

[0138] H=(66.5927-66.661)COS322.8999°+(-13.3270-(-13.6595))SIN322.8999°=-0.2550

[0139] C=-(66.5927-66.661)SIN52.8999°+(-13.3270-(-13.6595))COS52.8999°=0.02240

[0140] ΔH=HH bottom=-0.2550-(-0.255)=0.000

[0141] Mark point H11 at this measurement point.

[0142] Repeat the above steps. On the two first angle steels 3, select a point to measure and adjust until the H value meets the error requirements. Make three other marking points H12, H21, and H22. Through these four marking points, the relative elevation of the upper surface of the two first angle steels 3 and the center point 9 of the foundation is adjusted and fixed. Weld the first angle steels 3 with the adjusted relative elevation to the support rod 2.

[0143] Step 10: Install the second angle steel 4, the angle steel model is ∠50×5

[0144] like Figure 10 As shown, the back of the second angle steel 4 is facing down, and the upper surface of the first angle steel 3 is welded to the lower surface of the second angle steel 4. The upper side of the first angle steel 3 and the upper side of the second angle steel 4 are perpendicular to each other. The relative elevation error between the lower surface of the second angle steel 4 and the center point 9 of the foundation is controlled within 0 to -2 mm. The bottom end face of the screw 1 is fixed to the upper surface of the lower side of the second angle steel 4. The edge of the screw 1 abuts against the upper side of the second angle steel 4, and the upper sides of both second angle steels 4 are located on the left side of the screw 1.

[0145] The method for positioning the lower surface of the second angle steel 4 to be welded to the upper surface of the first angle steel 3 is as follows.

[0146] The approximate location of the orthographic projection point of the axis of the foundation center point 9 onto the plane containing the upper surface of the first angle steel 3 was selected as the measurement point, and the coordinates (-13.4885, 3.8098, 66.4681) were obtained. Coordinate transformation was then performed.

[0147] H=(66.4681-66.661)COS322.8999°+(-13.4885-(-13.6595))SIN322.8999°=-0.2570

[0148] C=-(66.4681-66.661)SIN52.8999°+(-13.4885-(-13.6595))COS52.8999°=0.0200

[0149] The measurement point was moved 0.0200 along the negative direction of the A-axis, and the coordinates were measured again (-13.5040, 3.8122, 66.4570). Coordinate transformation was then performed.

[0150] H=(66.4570-66.661)COS322.8999°+(-13.5040-(-13.6595))SIN322.8999°=-0.2565

[0151] C=-(66.4570-66.661)SIN52.8999°+(-13.5040-(-13.6595))COS52.8999°=0.0010

[0152] Marked as point C1;

[0153] Repeat the above steps, select another measurement point in the opposite direction of the C-axis of the above measurement point, determine the deviation value movement until the C coordinate meets the error requirement, and mark C2; the straight line obtained by connecting C1 and C2 is the B-axis. Draw two parallel lines 0.125m on both sides of this straight line. The C coordinate values ​​of these two parallel lines are the C coordinate values ​​of the central axis of screw 1. Since the screw diameter is 28mm, the angle steel thickness is 5mm, and the upper side of the second angle steel 4 is on the left side of screw 1, the left edge line of the second angle steel 4 should be at the parallel lines 0.106mm and 0.144mm away from the B-axis on the upper surface of the first angle steel 3, respectively. Place the second angle steel 4 according to these two positioning lines. Before welding and fixing, proceed to step eleven.

[0154] Step 11: Check the relative elevation between the upper surface of the lower side of the second angle steel 4 and the center point 9 of the foundation.

[0155] The coordinates of the measured point are (-13.3473, 3.8322, 66.5823).

[0156] H=(66.5823-66.661)COS322.8999°+(-13.3473-(-13.6595))SIN322.8999°=-0.2511

[0157] C=-(66.5823-66.661)SIN52.8999°+(-13.3473-(-13.6595))COS52.8999°=0.02015

[0158] ΔH=HH′ 底 =-0.2511-(-0.250)=-0.0011, which meets the 2mm requirement. Note H′ 底 It is the distance from the bottom end face of screw 1 to the center point 9 of the foundation in the H direction.

[0159] Repeat the above steps and select two measuring points on the lower side surface of each second angle steel 4 to check whether its relative elevation to the foundation center point 9 is qualified. The elevation deviation can be adjusted by placing shims on the contact surface between the second angle steel 4 and the first angle steel 3. After both are qualified, weld and fix the second angle steel 4.

[0160] Step 12: Fix the bottom end of screw 1

[0161] The bottom end of the screw 1 is fixed by a reinforcing frame 6. The reinforcing frame 6 is a rectangular frame with a square opening slot 7 with a side length of 28mm inside. The bottom end of the screw 1 is placed in the square opening slot 7. The thickness of the reinforcing frame 6 is 5mm and the height of the reinforcing frame is 10mm. The opening end of the reinforcing frame 6 is fixed to the upper side of the second angle steel 4, and the bottom end of the reinforcing frame 6 is fixed to the lower side of the second angle steel 4.

[0162] The reinforcement frame 6 can be fixed using the positioning method described above, determining its position by measuring the points at its edge line or outer corner; this embodiment uses a simpler method:

[0163] Set a positioning steel plate 8 with dimensions matching the square opening slot 7. The positioning steel plate is a square with a side length of 28mm and a height of 5mm. Mark its center. Place the positioning steel plate on the upper surface of the lower side of the second angle steel 4 and measure the coordinates of its center. The coordinates of the circular hole should be the coordinates of the center of the bottom end face of the screw 1. Repeatedly adjust and measure for any deviations until it is within the error range. At this time, put the reinforcing frame 6 around the positioning steel plate 8 and fix the reinforcing frame 6. Then remove the positioning steel plate 8 and continue to position other reinforcing frames 6. The specific measurement data is as follows:

[0164] The center position was checked, and the coordinates of the measured point were (-13.7089, 4.0271, 66.9320).

[0165] H=(66.9320-66.661)COS322.8999°+(-13.7089-(-13.6595))SIN322.8999°=-0.2459

[0166] C=-(66.9320-66.661)SIN52.8999°+(-13.7089-(-13.6595))COS52.8999°=0.1241

[0167] δC = 0.1241 - 0.1250 = -0.0009

[0168] δB = 4.027 - 4.0271 = -0.0001

[0169] δH = -0.2459 - (-0.250 + 0.005) = -0.0009, elevation including the 5mm thick positioning steel plate.

[0170] The coordinates are (0.1241, 4.0271, -0.2459).

[0171] If it meets the requirements, install and secure the reinforcing frame 6.

[0172] Repeat the above steps to locate the positions of the other reinforcing frames 6 using the positioning steel plate 8. The specific data is as follows:

[0173] The measured coordinates are (-13.7795, 3.9017, 66.4122) and (-13.7802, 4.1513, 66.4125), and the transformed coordinates are (-0.1260, 3.9017, -0.2458) and (-0.1254, 4.1513, -0.2461).

[0174] Step 13: Binding the reinforcing steel bars on the upper surface of the dome

[0175] A reinforcing bar 5 is installed at the upper end of the screw rod 1. The reinforcing bar 5 is located on the other side of the upper side of the second angle steel 4, that is, on the right side of the screw rod 1. Then the theoretical distance between the reinforcing bar 8 and the center point 9 of the foundation is 0.125±0.014, where 0.125 is the distance between the screw rod 1 and the center point 9 of the foundation, and 0.014 is the radius of the screw rod 1. That is, the left reinforcing bar should be 0.111 away from the center point 9 of the foundation, and the right reinforcing bar should be 0.139 away from the center point 9 of the foundation. Note that for the sake of simplicity in this demonstration, the diameter of the reinforcing bar is ignored. In actual situations, the diameter of the reinforcing bar should be taken into account.

[0176] The reinforcing steel bar 5 of the left screw 1 was selected for measurement, and the coordinates of the measurement point were obtained as (-13.5136, 3.9011, 66.6524).

[0177] H=(66.6524-66.661)COS322.8999°+(-13.5136-(-13.6595))SIN322.8999°=-0.09487

[0178] C=-(66.6524-66.661)SIN52.8999°+(-13.5136-(-13.6595))COS52.8999°=0.1100

[0179] δC = 0.111 - 0.1100 = 0.0010, which meets the requirements. Mark the location: C31.

[0180] Repeat the above steps, marking C32, C41, and C42, and tie and fix the reinforcing steel bars 5.

[0181] Step 14: Recheck the position of reinforcement frame 6;

[0182] Place the positioning steel plate 8 into the square opening slot 7 of the fixed reinforcing frame 6, measure its center point position, and convert the coordinates as follows:

[0183] The coordinates are (0.1243, 4.0269, -0.2457), (-0.1255, 3.9027, -0.2453), (-0.1251, 4.1521, -0.2463). After meeting the requirements, insert screw 1 into the reinforcing frame 5 and fix it slightly.

[0184] Step 15: Measure and inspect the position of the upper end face of screw 1.

[0185] Measure the coordinates of the center of the circle on the upper end face of one of the screws 1: (-13.6349, 4.0263, 66.8368).

[0186] Perform coordinate transformation

[0187] H=(66.8368-66.661)COS322.8999°+(-13.6349-(-13.6595))SIN322.8999°=0.1254

[0188] C=-(66.8368-66.661)SIN52.8999°+(-13.6349-(-13.6595))COS52.8999°=0.1257

[0189] δH=0.125-0.1254=-0.0004,

[0190] δC=0.125-0.1257=-0.0007,

[0191] δB=4.027-4.0263=0.0007,

[0192] If the requirements are met, repeat the above steps to determine the position of the upper end face of other screws 1, adjust according to the deviation value, and fix after re-measuring and calculating if qualified.

[0193] The transformed coordinates are (0.1254, 4.0263, 0.1257), (-0.1258, 3.9032, 0.1257), (-0.1258, 4.1532, 0.1265);

[0194] At the same time, the relative spacing between the screws is measured. After passing the measurement, the screws are bound and welded to fix them, thus completing the entire positioning and installation of screw 1.

[0195] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A method for positioning and inspecting the inclined screws of a dome tensioning platform foundation, comprising a dome, buttresses located on the bottom surface of the dome and passing through the dome, tensioning platform foundation screws located on both sides of the buttresses and parallel to the vertical planes passing through the buttresses, and a foundation center point located on the upper surface of the dome for positioning the screws, wherein the screws are located on the dome, and the coordinates of the foundation center point are (X0, Y0, Z0), characterized in that: First, the horizontal coordinates (X, Y) of the three-dimensional coordinates (X, Y, Z) of the measurement point on the dome are obtained using the formula... A=(XX q )cosα+(YY q )sinα B=-(X-X q )sinα+(Y-Y q )cosα Convert to a two-dimensional coordinate system (A,B) with the center of the dome's base as the origin O′, the direction parallel to the buttress columns as the A axis, and the direction perpendicular to the buttress columns as the B axis. Where X q Y q α is the horizontal coordinate of the center of the dome's base; α is the angle between the central axis of the buttress column and the positive direction of the X-axis; X and Y are the horizontal coordinates of the measurement point; A and B are the X and Y coordinates after transformation. After the above transformation, the three-dimensional coordinates of the measurement point on the dome become (A, B, Z). Then, the vertical plane coordinates (A, Z) of the measurement point on the dome are obtained using the formula... H=(Z-Z0)cosθ+(A-A0)sinθ C = -(Z - Z0)sinθ + (A - A0)cosθ Convert to: a two-dimensional coordinate system (C,H) with the orthographic projection of the base center point onto the vertical plane passing through the measurement point on the dome as the origin O″; the direction parallel to the screw's central axis as the H axis and the direction perpendicular to the screw's central axis as the C axis; Where Z0 and A0 are the coordinates of the basic center point in the new coordinate system after the first coordinate transformation; Z and A are the coordinates of the measurement points on the dome in the new coordinate system after the first coordinate transformation. q Let β be the elevation of the dome's base surface, and let β be the angle between the line connecting the orthographic projection of the foundation center point in the AOˊZ plane and O′ and the A-axis. This angle β is also the angle formed by the screw's central axis and the horizontal plane; θ is the angle by which the Z-axis is rotated clockwise to the direction of the screw's central axis. After the above two coordinate transformations, the coordinates of the foundation center point become (0, B0, 0), and the coordinates of the measuring point on the dome become (C, B, H), where B0 is the B-axis coordinate value of the foundation center point after the first coordinate transformation; the screw is at a specified distance from the foundation center in the C, B, and H directions, and the three-dimensional coordinates on the screw are measured. After the above two coordinate transformations, it can be intuitively determined whether the screw meets the installation requirements.

2. A method for positioning and installing inclined screws on the foundation of a dome tensioning platform, characterized in that: Using the positioning inspection method described in claim 1, at least four support rods (2) are fixed on the steel reinforcement skeleton of the dome casting layer, the support rods (2) being parallel to the inclined direction of the screw (1); a first angle steel (3) is fixed between the support rods (2), the back of the first angle steel (3) facing upwards, a second angle steel (4) is fixed on the upper surface of the first angle steel (3), the back of the second angle steel (4) facing downwards, the screw is fixed on the upper surface of the lower side of the second angle steel (4), and the position of the steel reinforcement skeleton of the dome casting layer is offset from the screw (1), the first angle steel (3), and the second angle steel (4).

3. The method for positioning and installing inclined screws on the foundation of a dome tensioning platform according to claim 2, characterized in that: The support rod (2) is located outside the screw (1), and a first angle steel (3) is fixed between adjacent support rods (2) in the direction of B axis or C axis.

4. The method for positioning and installing inclined screws on the foundation of a dome tensioning platform according to claim 3, characterized in that: The upper side of the first angle steel (3) is perpendicular to the support rod (2), and the absolute value of the H coordinate of the upper surface of the upper side of the first angle steel (3) is equal to the H coordinate of the bottom end face of the screw (1) plus the thickness of the second angle steel (4).

5. The method for positioning and installing inclined screws on the foundation of a dome tensioning platform according to claim 4, characterized in that: The upper surface H coordinate of the lower side of the second angle steel (4) is equal to the bottom end face H coordinate of the screw (1), and the edge of the screw (1) is in contact with the upper side of the second angle steel (4).

6. The method for positioning and installing inclined screws on the foundation of a dome tensioning platform according to claim 5, characterized in that: The upper side of the first angle steel (3) is perpendicular to the upper side of the second angle steel (4).

7. The method for positioning and installing inclined screws on the foundation of a dome tensioning platform according to claim 6, characterized in that: The screw (1) is fixed on the lower side of the second angle steel (4) at a preset distance from the center point (9) of the foundation.

8. The method for positioning and installing inclined screws on the foundation of a dome tensioning platform according to claim 7, characterized in that: At the point where the screw (1) contacts the upper surface of the dome, a reinforcing steel bar (5) is provided parallel to the upper side of the second angle steel (4) and abuts against the edge of the screw (1). The reinforcing steel bar (5) and the second angle steel (4) are located on opposite sides of the screw (1).

9. The method for positioning and installing inclined screws on the foundation of a dome tensioning platform according to claim 8, characterized in that: The bottom end of the screw (1) is provided with a reinforcing frame (6), the reinforcing frame is provided with a square opening slot (7), the side length of the square opening slot (7) is equal to the outer diameter of the screw (1), the bottom end of the screw (1) is placed in the square opening slot (7), and the opening end and bottom end of the reinforcing frame (6) are respectively fixed to the upper side and lower side of the second angle steel (4).

10. The method for positioning and installing inclined screws on the foundation of a dome tensioning platform according to claim 9, characterized in that: The square opening slot (7) is provided with a positioning steel plate (8) that matches its shape. The square opening slot (7) and the positioning steel plate (8) are slidably engaged. The positioning steel plate (8) is used to position the square opening slot (7).

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