A sinking well inner joint pipe design device and checking method

Abstract

The utility model relates to a kind of sinking well inner design equipment and checking method of closing pipe, it relates to pipeline engineering technical field.Sliding block sliding connection is in support rotary disc, support rotary disc is equipped with support column, and sliding block one end is equipped with telescopic boom, the lower end of telescopic boom is equipped with horizontal angle dial, the bottom of telescopic boom is connected with single ear elbow through elbow hanger, the inner side of single ear elbow is movably connected with the outer side of double ear elbow, and the inner side of double ear elbow is installed on telescopic connecting rod.The utility model has beneficial effects: the device and method of the utility model can greatly improve closing pipe production level, while reducing the length of remaining stub, avoid the loss of material due to production failure, not only can standardize steel pipe pipeline, ductile cast iron pipeline and prestressed steel cylinder concrete pipe and other pipeline industry closing pipe design, manufacture, checking and other operations, and its precision is higher, can ensure pipeline accurate closing, effectively guarantee its construction period and reduce economic loss.

Description

Technical Field

[0001] This invention relates to the field of pipeline engineering technology, specifically to a design device and verification method for a closure pipe inside a caisson. Background Technology

[0002] Because basic parameters such as pipe axis, elevation, shape, and length cannot be clearly given during pipeline design, connecting pipes can only be fabricated on-site after the pipes on both sides are installed separately. Since multiple work faces are constructed simultaneously in open-cut pipe work, adjacent work faces must be connected using merging pipes. Furthermore, within each caisson of the pipe jacking project, a merging pipe must be fabricated at the end after the pipes on both sides have been jacked up.

[0003] Among them, the reasons for the closure of open-cut pipes are as follows: Figure 12 As shown: If construction proceeds from point a to point b, and simultaneously from point b to point c, a set of pipe fittings that need to be finally joined will inevitably be generated at point b. These pipe fittings are collectively referred to as the joining pipes.

[0004] The reasons for the pipe jacking closure are as follows: Figure 13 As shown: Caisson 1 is being jacked up towards caisson 2 and caisson 3 respectively. At this time, a merging pipe will inevitably be generated inside caisson 1.

[0005] Therefore, it is evident that closure pipes are unavoidable in pipeline installation projects. Furthermore, the actual installation axis direction, length, elevation, and other factors of the pipelines that need to be closed cannot be determined. Thus, they cannot be designed and manufactured in advance by the design unit. They can only be manufactured and installed on-site after the pipeline installation is completed.

[0006] However, the design and fabrication of the closure pipe still faces the following challenges:

[0007] 1. Designers need to have extremely strong design skills; otherwise, the closure pipe may become unusable, affecting the construction period and causing economic losses.

[0008] 2. It requires personnel to be familiar with various specifications and requirements, and the skill requirements are too high, which severely tests the design, manufacturing and installation skills of the relevant personnel;

[0009] 3. The design has a large discrepancy with the actual situation, which leads to a greater risk of failure and further affects the construction period. Summary of the Invention

[0010] The purpose of this invention is to address the shortcomings and defects of existing technologies by providing a design equipment and verification method for closure pipes within caissons. Using the equipment and method of this invention can significantly improve the quality of closure pipe manufacturing, while reducing the length of remaining material, avoiding delays and material losses due to manufacturing errors. It can not only standardize the design, manufacturing, and verification of closure pipes in the pipeline industry, including steel pipes, ductile iron pipes, and prestressed steel cylinder concrete pipes, but also achieve higher precision, ensuring accurate pipeline closure and effectively guaranteeing construction schedules and reducing economic losses.

[0011] To achieve the above objectives, the present invention adopts the following technical solution: a design device and verification method for a caisson closure pipe, comprising a slider 1, a supporting rotating disk 2, a telescopic rod 4, an elbow hanger 6, a single-ear elbow 7, a double-ear elbow 8, and a telescopic connecting rod 9. The slider 1 is slidably connected to the supporting rotating disk 2, and a supporting column 3 is installed on the supporting rotating disk 2. A telescopic rod 4 is installed at one end of the slider 1. A horizontal angle scale 5 is provided at the lower end of the telescopic rod 4. The bottom of the telescopic rod 4 is connected to the single-ear elbow 7 through the elbow hanger 6. The inner side of the single-ear elbow 7 is movably connected to the outer side of the double-ear elbow 8, and the inner side of the double-ear elbow 8 is installed on the telescopic connecting rod 9.

[0012] Furthermore, there are two supporting rotating disks 2, and the two supporting rotating disks 2 are connected to each other through supporting columns 3.

[0013] Furthermore, the elbow hanger 6 includes a clamp 63, which cooperates with the elbow hanger 6. The top of the elbow hanger 6 is provided with a hanger slewing ring 61. One side of the hanger slewing ring 61 extends outward to form a hanger angle pointer 62, and the left and right ends of the elbow hanger 6 are provided with height difference adjustment reference surfaces 64.

[0014] Furthermore, the supporting rotating disk 2 is provided with rotating disk scale lines 2-1.

[0015] Furthermore, the slider 1 is provided with a rod positioning hole 1-1 for connecting and installing the telescopic rod 4, a locking screw hole 1-2 for installing the locking bolt, and a scale observation window 1-3 for observing the scale line 2-1 of the rotating disk.

[0016] Furthermore, the outer side of the horizontal angle dial 5 is provided with a horizontal scale line 5-1.

[0017] Furthermore, the elbow hanger 6 has an axial scale line observation groove 6-1 in the middle and a circumferential scale line observation groove 6-2 at the bottom. A positioning hole 6-3 is provided at the junction of the axial scale line observation groove 6-1 and the circumferential scale line observation groove 6-2.

[0018] Furthermore, the single-ear elbow 7 has an axial scale line 7-1 on its ring arm for displaying the axial value of the elbow and a circumferential scale line 7-2 on its ring for displaying the circumferential scale of the elbow, and an elbow angle scale line 7-3 on its lug for displaying the rotation angle of the elbow.

[0019] A design device and verification method for a caisson closure pipe, comprising the following specific methods and steps: drawing a side view, measuring the coordinates of parameter points 1, 2, 3, and 4, and L1 and L2 in the side view, and drawing in CAD to obtain the remaining parameters such as point a, point b, L1, L3, ∠1, ∠2, and H. Points 1 and 3 are measurement points on the edge of the pipe opening to be closed, generally the lowest point of the inner wall; point 2 is located on the same pipe section as point 1, and keeping point 2 as far away from point 1 as possible improves measurement accuracy; point 4 is located on the same pipe section as point 3, and keeping point 4 as far away from point 3 as possible improves measurement accuracy; point a is the left pipe axis and the caisson closure pipe... Point b is the intersection of the inner wall of the well and the right pipe axis with the inner wall of the well; L is the horizontal projection distance of the actual distance L0 between the pipe openings on the left and right sides; L1 is the horizontal distance from point 1 to point a; L2 is the horizontal distance from point 3 to point b; L3 is the horizontal distance between points a and b; H is the vertical relative height difference between points 1 and 3; ∠1 is the angle between the radius passing through point a and the left pipe axis; ∠2 is the angle between the radius passing through point b and the right pipe axis; adjust the horizontal net distance between the upper and lower sliders 1 according to the parameters above, so that the horizontal distance of the positioning hole of the elbow hanger 6 = L3, and lock the locking nuts of the upper and lower sliders 1; adjust according to the parameters above. The extension of the telescopic rod 4 adjusts the vertical distance H between the upper and lower elbow hangers 6 and the foundation surface, and locks the locking nuts of the two elbow hangers 6. Based on the angle ∠1, the left elbow hanger 6 is rotated horizontally to make its angle = ∠1; based on the angle ∠2, the right elbow hanger 6 is rotated horizontally to make its angle = ∠2. The locking nuts at the corresponding positions of the elbow hangers 6 are locked, at which point only the spatial positions of points a and b, and the direction of the left pipe axis are restricted. By adjusting the axial extension of the two single-ear elbows 7, the inflection points of the single-ear elbows 7 reach positions 1 and 3, and the clamps 63 on both sides of the elbow hangers 6 are locked, restricting... The single-ear elbow 7 moves left and right along the axis of the elbow hanger 6. At this time, the axis of the single-ear elbow 7 is determined, and the single-ear elbow 7 can rotate 360° along its axis. The single-ear elbow 7 and the double-ear elbow 8 can rotate around their elbow pins. Using the telescopic connecting rod 9, the rotation direction of the upper and lower single-ear elbows 7 along the axis and the rotation direction of the double-ear elbow 8 are adjusted so that both ends of the telescopic connecting rod 9 are completely inserted into the annular body of the double-ear elbow 8, that is, the upper and lower double-ear elbows 8 are concentric. At this time, all parameters of the closing tube have been solidified. The angle parameters are read on the scale lines on the elbow hanger 6 and the single-ear elbow 7, and the final closing tube length can be determined by measuring the telescopic connecting rod.

[0020] After adopting the above technical solution, the beneficial effects of the present invention are as follows: the equipment and method of the present invention can greatly improve the level of pipe closure manufacturing, while reducing the length of the remaining material head, avoiding delays and material losses caused by manufacturing errors. It can not only standardize the design, manufacturing, and verification of pipe closures in the pipeline industry such as steel pipes, ductile iron pipes, and prestressed steel cylinder concrete pipes, but also has higher precision, which can ensure accurate pipeline closure, effectively guarantee the construction period and reduce economic losses. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the present invention.

[0023] Figure 2 This is a schematic diagram showing the connection status of the single-ear elbow 7, the double-ear elbow 8, and the telescopic connecting rod 9 in this invention.

[0024] Figure 3 This is a schematic diagram of the slider 1 in this invention.

[0025] Figure 4 This is a schematic diagram of the structure of the elbow hanger 6 and the single-ear elbow 7 in this invention.

[0026] Figure 5 This is a schematic diagram of the single-ear elbow 7 in this invention.

[0027] Figure 6 This is a schematic diagram of the elbow hanger 6 in this invention.

[0028] Figure 7 yes Figure 6 Enlarged structural diagram at point A in the middle.

[0029] Figure 8 This is a schematic diagram of the structure supporting the rotating disk 2 in this invention.

[0030] Figure 9 This is a schematic diagram showing the connection status of the telescopic rod 4, the elbow hanger 6, and the single-ear elbow 7 in this invention.

[0031] Figure 10 This is the top view of the measurement in this invention.

[0032] Figure 11 This is the side view of the measurement in this invention.

[0033] Figure 12 This is a schematic diagram illustrating the reasons for the closure of open-cut pipes in existing technologies.

[0034] Figure 13 This is a schematic diagram illustrating the reasons for pipe jacking closure in existing technologies.

[0035] Explanation of reference numerals in the attached diagram: 1. Slider; 2. Support rotating disk; 3. Support column; 4. Telescopic hanger; 5. Horizontal angle scale; 6. Elbow hanger; 7. Single-ear elbow; 8. Double-ear elbow; 9. Telescopic connecting rod; 61. Hanger rotating ring; 62. Hanger angle pointer; 63. Clamp; 64. Height difference adjustment reference surface; 1-1. Hanger positioning hole; 1-2. Locking screw hole; 1-3. Scale observation window; 2-1. Rotating disk scale line; 5-1. Horizontal scale line; 6-1. Axial scale line observation groove; 6-2. Circumferential scale line observation groove; 6-3. Positioning hole; 7-1. Axial scale line of elbow; 7-2. Circumferential scale line of elbow; 7-3. Angle scale line of elbow. Detailed Implementation

[0036] See Figures 1-11 As shown, the technical solution adopted in this specific embodiment is as follows: it includes a slider 1, a supporting rotating disk 2, a telescopic rod 4, an elbow hanger 6, a single-ear elbow 7, a double-ear elbow 8, and a telescopic connecting rod 9. The slider 1 is slidably connected to the supporting rotating disk 2. A supporting column 3 is installed on the supporting rotating disk 2, and a telescopic rod 4 is installed at one end of the slider 1. A horizontal angle scale 5 is provided at the lower end of the telescopic rod 4. The bottom of the telescopic rod 4 is connected to the single-ear elbow 7 through the elbow hanger 6. The inner side of the single-ear elbow 7 is movably connected to the outer side of the double-ear elbow 8, and the inner side of the double-ear elbow 8 is installed on the telescopic connecting rod 9.

[0037] More specifically, there are two supporting rotating disks 2, and the two supporting rotating disks 2 are connected to each other by supporting columns 3. The two supporting rotating disks 2 are located at the upper and lower ends of the caisson, respectively, which can better support and place the internal structure. The use of supporting columns 3 to connect the two supporting rotating disks 2 not only ensures the stability of the supporting rotating disks 2, but also makes it easy for the staff to make vertical adjustments to the supporting rotating disks 2 according to the actual height of the caisson.

[0038] More specifically, the elbow hanger 6 includes a clamp 63, which cooperates with the elbow hanger 6. The top of the elbow hanger 6 is provided with a hanger swivel ring 61. One side of the hanger swivel ring 61 extends outward to form a hanger angle pointer 62, and the left and right ends of the elbow hanger 6 are provided with height difference adjustment reference surfaces 64. When suspending the single-ear elbow 7, the elbow hanger 6 should be installed on the single-ear elbow 7 first, and then the elbow hanger 6 and the single-ear elbow 7 should be fixed by the clamp 63. The hanger swivel ring 61 facilitates the connection and installation of the telescopic hanger 4, and the horizontal angle is determined by the hanger angle pointer 62 in conjunction with its horizontal angle scale 5. During installation and adjustment, the height difference adjustment reference surface 64 can be used for judgment and determination, and it should be ensured that the height difference adjustment reference surface 64 remains balanced.

[0039] More specifically, the supporting rotating disk 2 is provided with rotating disk scale lines 2-1. The supporting rotating disk 2 serves as a circular track for the movement of the slider 1. Its outer edge has rotating disk scale lines 2-1 evenly distributed along the center of the circle from 0 to 360°. The positioning hole 1-1 of the slider 1, which is precisely matched with it, can ensure that the positioning hole of the elbow hanger 6 is always located above the center line of the supporting rotating disk 2, and the supporting rotating disk 2 can be vertically adjusted according to the actual height of the caisson.

[0040] More specifically, the slider 1 is provided with a rod positioning hole 1-1 for connecting and installing the telescopic rod 4, a locking screw hole 1-2 for installing the locking bolt, and a scale observation window 1-3 for observing the scale line 2-1 of the rotating disk.

[0041] More specifically, a horizontal scale line 5-1 is provided on the outer side of the horizontal angle dial 5. The horizontal scale line 5-1 works in conjunction with the hanger angle pointer 62 to facilitate the observation and recording of the horizontal angle of the single-ear elbow 7 by the staff.

[0042] More specifically, the elbow hanger 6 has an axial scale observation slot 6-1 in the middle and a circumferential scale observation slot 6-2 at the bottom. A positioning hole 6-3 is located at the junction of the axial scale observation slot 6-1 and the circumferential scale observation slot 6-2. The axial scale observation slot 6-1 facilitates the observation and recording of the axial scale line 7-1 of the elbow by workers, while the circumferential scale observation slot 6-2 is used to observe and record the value of the circumferential scale line 7-2 of the elbow. The elbow hanger 6 is positioned and installed through the positioning hole 6-3.

[0043] More specifically, the single-ear elbow 7 has an axial scale line 7-1 on its ring arm for displaying the axial value of the elbow and an circumferential scale line 7-2 on its ring for displaying the circumferential scale of the elbow, and the single-ear elbow 7 has an angle scale line 7-3 on its lug for displaying the rotation angle of the elbow.

[0044] A design device and verification method for the closure pipe inside a caisson, comprising the following specific methods and steps:

[0045] S1, Draw the side view, i.e. Figures 10-11 This allows for the measurement of the coordinates of points 1, 2, 3, and 4 in the side view, as well as L1 and L2. The remaining parameters, such as a, b, L1, L3, ∠1, ∠2, and H, can be obtained by drawing in CAD. Points 1 and 3 are the measurement points on the edges of the pipe openings to be joined, generally the lowest points on the inner wall. Point 2 is located on the same pipe section as point 1; keeping point 2 as far away from point 1 as possible improves measurement accuracy. Similarly, point 4 is located on the same pipe section as point 3; keeping point 4 as far away from point 3 as possible improves measurement accuracy. To improve measurement accuracy; point a is the intersection of the left pipe axis and the inner wall of the caisson, and point b is the intersection of the right pipe axis and the inner wall of the caisson; L is the horizontal projection distance of the actual distance L0 between the pipe openings on the left and right sides, L1 is the horizontal distance from point 1 to point a, L2 is the horizontal distance from point 3 to point b, L3 is the horizontal distance between points a and b, and H is the vertical relative height difference between points 1 and 3; ∠1 is the angle between the radius passing through point a and the left pipe axis; ∠2 is the angle between the radius passing through point b and the right pipe axis.

[0046] S2, adjust the horizontal clearance between the upper and lower sliders 1 in sequence according to the parameters in S1, so that the horizontal distance of the positioning hole of the elbow hanger 6 is L3, and lock the locking nuts of the upper and lower sliders 1.

[0047] S3, adjust the extension of the telescopic rod 4 according to the parameters in S1, so that the vertical distance between the upper and lower elbow hangers 6 and the foundation surface is adjusted to H, and lock the locking nuts of the two elbow hangers 6.

[0048] S4, based on the angle value of ∠1, rotate the left elbow hanger 6 horizontally so that its angle = ∠1;

[0049] S5, based on the angle value of ∠2, rotate the right elbow hanger 6 horizontally so that its angle = ∠2;

[0050] S6, locking nuts at the corresponding positions of the elbow hanger 6, at this time only restrict the spatial position of points a and b, and the direction of the left pipe axis;

[0051] S7, by adjusting the axial extension and contraction of the two single-ear elbows 7 respectively, the inflection point of the single-ear elbow 7 reaches the positions of point 1 and point 3, locking the clamps 63 on both sides of the elbow hanger 6, restricting the single-ear elbow 7 from moving left and right along the axial direction of the elbow hanger 6. At this time, the axis of the single-ear elbow 7 is determined, and the single-ear elbow 7 can rotate 360° along its axis. The single-ear elbow 7 and the double-ear elbow 8 can rotate around their elbow pins.

[0052] S8. Using the telescopic connecting rod 9, adjust the rotation direction of the upper and lower single-ear elbows 7 along the axis and the rotation direction of the double-ear elbows 8 so that both ends of the telescopic connecting rod 9 are completely inserted into the annular body of the double-ear elbows 8, that is, the upper and lower double-ear elbows 8 are concentric. At this time, all parameters of the closing tube have been solidified.

[0053] S9. Read the various angle parameters on the scale lines on the elbow hanger 6 and the single-ear elbow 7, and then measure the telescopic connecting rod to know the final closing tube length.

[0054] The working principle of this invention: According to Figures 10-11 This allows us to determine the relevant parameters such as L / L1 / L2 / L3 / H and ∠1, ∠2. Then, we adjust the upper and lower elbow telescopic rods 4 so that the vertical distance between the two height difference adjustment reference surfaces 64 on the elbow hanger 6 is H. We then lock the locking nuts on the elbow telescopic rods 4. Here, H represents only the vertical relative distance between the two elbow axes on the horizontal plane. We adjust the upper and lower sliders 1 so that the horizontal distance between the positioning holes 6-3 on the elbow hanger 6 is L3, and lock the locking nuts on the sliders 11. Finally, we rotate the upper elbow hanger horizontally. Mount the upper elbow hanger 6, aligning the hanger angle pointer 62 of the upper elbow hanger 6 with the angle shown on the horizontal angle scale of the upper elbow telescopic hanger 4 as ∠1, and lock the corresponding locking nut on the telescopic hanger 4. Rotate the lower elbow hanger 6 horizontally, aligning the hanger angle pointer 62 of the lower elbow hanger 6 with the angle shown on the horizontal angle scale of the lower elbow telescopic hanger 4 as ∠2, and lock the corresponding locking nut on the hanger angle pointer 62. Then, move the upper single-ear elbow 7 horizontally, aligning the single-ear elbow 7 with the dimension relative to the scale line on the elbow hanger 6 as ∠1. L1, and lock the clamps 63 located on both sides of the elbow hanger 6. At this time, the upper single-ear elbow 7 can still rotate around its own axis. By moving the lower single-ear elbow 7 horizontally, make the dimension of the lower single-ear elbow 7 relative to the scale line on the lower elbow hanger 6 equal to L2, and lock the clamps 63 located on both sides of the lower elbow hanger 6. At this time, the lower single-ear elbow 7 can still rotate around its own axis. At this time, all measurement parameters have been completely copied onto this equipment. Rotate the upper and lower double-ear elbows 8 respectively to make their axes nearly aligned, roughly measure their distance, and select... With the appropriate telescopic connecting rod 9 inserted into the double-ear elbow 8, the accurate elbow angle and installation angle can be obtained by reading the elbow angle scale line 7-3 and the elbow circumferential scale line 7-2 on the single-ear elbow 7. The locking devices used in this equipment are all locking nuts. The purpose of the locking nuts is to restrict the free movement or rotation of the corresponding components after they have been adjusted to the appropriate position, so that the components whose positions have been determined will not move or rotate when adjusting other components later.

[0055] The above is only used to illustrate the technical solution of the present invention and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A design device for a caisson closure pipe, characterized in that: It includes a slider (1), a support rotating disk (2), a telescopic rod (4), an elbow hanger (6), a single-ear elbow (7), a double-ear elbow (8), and a telescopic connecting rod (9). The slider (1) is slidably connected to the support rotating disk (2). A support column (3) is installed on the support rotating disk (2). A telescopic rod (4) is installed at one end of the slider (1). A horizontal angle scale (5) is provided at the lower end of the telescopic rod (4). The bottom of the telescopic rod (4) is connected to the single-ear elbow (7) through the elbow hanger (6). The inner side of the single-ear elbow (7) is movably connected to the outer side of the double-ear elbow (8). The inner side of the double-ear elbow (8) is installed on the telescopic connecting rod (9). The elbow hanger (6) includes a clamp (63), which cooperates with the elbow hanger (6). The top of the elbow hanger (6) is provided with a hanger slewing ring (61). One side of the hanger slewing ring (61) extends outward to form a hanger angle pointer (62). The left and right ends of the elbow hanger (6) are provided with height difference adjustment reference surfaces (64). The slider (1) is provided with a rod positioning hole (1-1) for connecting and installing the telescopic rod (4), a locking screw hole (1-2) for installing the locking bolt, and a scale observation window (1-3) for observing the scale line (2-1) of the rotating disk; The elbow hanger (6) has an axial scale line observation groove (6-1) in the middle and a circumferential scale line observation groove (6-2) at the bottom. A positioning hole (6-3) is provided at the junction of the axial scale line observation groove (6-1) and the circumferential scale line observation groove (6-2). The single-ear elbow (7) has an axial scale line (7-1) for displaying the axial value of the elbow and a circumferential scale line (7-2) for displaying the circumferential scale of the elbow on its ring arm, and an elbow angle scale line (7-3) for displaying the rotation angle of the elbow on its lug.

2. The design equipment for the caisson closure pipe according to claim 1, characterized in that: There are two supporting rotating disks (2), and the two supporting rotating disks (2) are connected to each other through supporting columns (3).

3. The design equipment for the caisson closure pipe according to claim 1, characterized in that: The supporting rotating disk (2) is provided with rotating disk scale lines (2-1).

4. The design equipment for the caisson closure pipe according to claim 1, characterized in that: The horizontal angle dial (5) has horizontal scale lines (5-1) on its outer side.

5. A verification method for a caisson internal closure pipe design device, applicable to any one of the caisson internal closure pipe design devices according to claims 1-4, characterized in that: It includes the following specific methods and steps: S1. Draw the side view, and measure the coordinates of points 1, 2, 3, and 4 in the side view, as well as L1 and L2. Then, draw the drawing in CAD to obtain the parameters of the remaining points a, b, L1, L3, ∠1, ∠2, and H. Points 1 and 3 are measurement points on the edge of the pipe opening to be closed, generally the lowest point on the inner wall. Point 2 is located on the same pipe section as point 1; moving point 2 away from point 1 improves measurement accuracy. Point 4 is located on the same pipe section as point 3; moving point 4 away from point 1 improves measurement accuracy.

3. Improves measurement accuracy; Point a is the intersection of the left pipe axis and the inner wall of the caisson, and point b is the intersection of the right pipe axis and the inner wall of the caisson; L is the horizontal projection distance of the actual distance L0 between the pipe openings on the left and right sides, L1 is the horizontal distance from point 1 to point a, L2 is the horizontal distance from point 3 to point b, L3 is the horizontal distance between points a and b, and H is the vertical relative height difference between points 1 and 3; ∠1 is the angle between the radius passing through point a and the left pipe axis; ∠2 is the angle between the radius passing through point b and the right pipe axis. S2, adjust the horizontal net distance between the upper and lower sliders (1) according to the parameters in S1, so that the horizontal distance of the positioning hole of the elbow hanger (6) is L3, and lock the locking nuts of the upper and lower sliders (1). S3, adjust the extension of the telescopic rod (4) according to the parameters in S1, so that the vertical distance of the foundation surface is adjusted by the height difference between the upper and lower elbow hangers (6) = H, and lock the locking nuts of the two elbow hangers (6). S4, based on the angle value of ∠1, rotate the left elbow hanger (6) horizontally so that its angle = ∠1; S5, based on the angle value of ∠2, rotate the right elbow hanger (6) horizontally so that its angle = ∠2; S6, locking the locking nut at the corresponding position of the elbow hanger (6), at this time only restricts the spatial position of point a and point b, and the direction of the left pipe axis; S7, by adjusting the axial extension and contraction of the two single-ear elbows (7) respectively, the inflection point of the single-ear elbow (7) reaches the positions of point 1 and point 3, locking the clamps (63) on both sides of the elbow hanger (6), restricting the single-ear elbow (7) from moving left and right along the axial direction of the elbow hanger (6). At this time, the axis of the single-ear elbow (7) is determined, and the single-ear elbow (7) can rotate 360° along its axis. The single-ear elbow (7) and the double-ear elbow (8) can rotate around their elbow pins. S8. Using the telescopic connecting rod (9), adjust the rotation direction of the upper and lower single-ear elbows (7) along the axis and the rotation direction of the double-ear elbows (8) so that both ends of the telescopic connecting rod (9) are completely inserted into the annular body of the double-ear elbows (8), that is, the upper and lower double-ear elbows (8) are concentric. At this time, all parameters of the closing tube have been solidified. S9, read the various angle parameters on the scale lines on the elbow hanger (6) and the single-ear elbow (7), and then measure the telescopic connecting rod to know the final closing tube length value.

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