High-precision mounting method for anchor belt of low-temperature storage tank

Abstract

The invention relates to the technical field of low-temperature tank foundation structures, in particular to a high-precision mounting method of a low-temperature storage tank anchor belt, which comprises the following steps: S1, manufacturing an anchor belt positioning base; s2, after column steel bars are bound to the position of a bearing platform and a bearing platform formwork is built, the mounting positions of inner and outer ring anchor belts are positioned, and anchor belt positioning bases are fixed to the mounting positions of the anchor belts; s3, bearing platform ring beam steel bars are bound, and the inner ring anchor belt and the outer ring anchor belt are installed in the corresponding anchor belt positioning bases; and S4, the position of the anchor belt is calibrated, and then the position of the anchor belt is fixed. By manufacturing the anchor belt positioning base and fixing the anchor belt positioning base at the mounting position of the anchor belt, the anchor belt positioning work is preposed, so that conflicts during mounting and binding of ring beam steel bars of a bearing platform can be reduced, the construction efficiency and flexibility are improved, reliable support can be provided for the bottom of the anchor belt, and the construction cost is reduced. The position of the anchor belt is slightly influenced by follow-up work.

Description

Technical Field

[0001] The present invention relates to the technical field of cryogenic tank foundation structures, and in particular to a high-precision installation method for a cryogenic storage tank anchor belt. Background Art

[0002] During the construction of the foundation platform for double-steel-walled cryogenic tanks, the old design of embedded anchor bolts was gradually replaced by the new design of embedded anchor straps. The anchor strap is the connector between the tank and the concrete foundation, and its main function is to securely fix the tank to the foundation platform. The anchor strap is usually made of high-strength materials, such as steel, to ensure that it can withstand the weight of the tank and various external forces that may be generated. The advantage of the anchor strap over the anchor bolt is that it is a flexible connection instead of a rigid connection. The anchor strap can move slightly as the inner tank contracts due to cooling, reducing the additional stress generated by the bottom ring tank wall and extending the service life of the equipment. The installation accuracy of the anchor strap is very high. Usually, the radius deviation of the outer anchor strap position does not exceed ±6mm, the height of the anchor strap extending from the concrete base does not exceed ±10mm, and the chord length deviation between any two anchor points does not exceed ±6mm.

[0003] When installing anchor belts, the existing technology usually involves making brackets to support the anchor belts on the outer ring beam of the foundation platform. This method often affects the installed anchor belts when people move around, materials are loaded and unloaded, and concrete is poured, causing position shifts, thereby affecting the subsequent wall panel installation and posing a great hidden danger. Summary of the Invention

[0004] The object of the present invention is to provide a high-precision installation method for a cryogenic storage tank anchor strap, which can at least solve some of the defects in the prior art.

[0005] To achieve the above objectives, the technical solution of the present invention is a high-precision installation method for a cryogenic storage tank anchor strap, comprising the following steps: S1. Make anchor belt positioning base; S2. After the column reinforcement is tied to the pedestal position and the pedestal formwork is completed, locate the installation positions of the inner and outer ring anchor belts and fix the anchor belt positioning base at the installation position of the anchor belts; S3. Tie the steel bars of the cap ring beam and install the inner and outer ring anchor belts in the corresponding anchor belt positioning bases; S4. Calibrate the position of the anchor belt and then fix the position of the anchor belt.

[0006] Furthermore, in step S2, when the installation position of the anchor belt is outside the column position, the anchor belt positioning base outside the column is used, and the anchor belt positioning base outside the column is fixed on the base template; when the installation position of the anchor belt is at the column position, the anchor belt positioning base inside the column is used, and the anchor belt positioning base inside the column is welded to the column steel bar.

[0007] Furthermore, the column outer anchor belt positioning base includes a concrete structure and a limiting structure, the bottom of the limiting structure is pre-embedded in the concrete structure, and the four sides of the concrete structure are fixed to the base template by capless iron nails.

[0008] Furthermore, the column inner anchor belt positioning base includes a steel bar structure and a limiting structure, the bottom of the limiting structure is welded to the steel bar structure, and the steel bar structure is welded to the column steel bar.

[0009] Furthermore, a shear groove is provided on the top of the limiting structure; an anchor plate is provided at the bottom of the anchor belt, and a shear key is provided on the bottom surface of the anchor plate; in step S3, the anchor plate is installed on the top surface of the limiting structure, and the shear key is inserted into the shear groove.

[0010] Furthermore, the limiting structure includes a straight steel bar and at least two pairs of inverted L-shaped steel bars symmetrically arranged on both sides of the straight steel bar, and each of the inverted L-shaped steel bars is welded to the straight steel bar, and the shear groove is formed between the inverted L-shaped steel bars on both sides of the straight steel bar.

[0011] Furthermore, the method for calibrating the position of the anchor belt in step S4 is: setting up a total station in the center of the platform, re-measuring the radial position of the inner ring anchor belt one by one, and calibrating the chord length of the inner ring anchor belt and the radial position and chord length of the outer ring anchor belt by using an anchor belt calibration fixture.

[0012] Furthermore, the anchor band calibration fixture is provided with an inner ring anchor band positioning groove for positioning the inner ring anchor band and an outer ring anchor band positioning groove for positioning the outer ring anchor band on both radial side surfaces.

[0013] Furthermore, in step S4, the position of the anchor belt is fixed by placing four short steel bars on four sides of the anchor belt respectively, and welding the intersections of adjacent short steel bars and the intersections of the short steel bars and the steel bars of the cap ring beam.

[0014] Furthermore, step S4 further includes step S5: tying the steel bars of the foundation platform, and then calibrating the position of the anchor belt again.

[0015] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention manufactures an anchor belt positioning base and fixes the anchor belt positioning base at the installation position of the anchor belt, thereby putting the anchor belt positioning work in front, reducing the conflict with the installation and binding of the steel bars of the cap ring beam, and improving construction efficiency and flexibility; (2) The method of the present invention is simple and quick, greatly reducing the work of measures and alleviating the physical burden of the installers. It does not require reliance on large tools, thus improving the flexibility of the operation and the adaptability to the site. (3) The anchor belt fixed by the method of the present invention has high installation accuracy, is firm and reliable, and the position of the anchor belt is less affected by subsequent work. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only 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.

[0017] Figure 1 A schematic structural diagram of a concrete foundation for installing a cryogenic storage tank according to an embodiment of the present invention; Figure 2 A schematic diagram of the arrangement of the anchor belt on the cap ring beam according to an embodiment of the present invention; Figure 3 A schematic diagram of the installation of a cryogenic storage tank anchor strap according to an embodiment of the present invention; Figure 4 A schematic structural diagram of an outer column anchor belt positioning base provided by an embodiment of the present invention; Figure 5 for Figure 4 AA view; Figure 6 for Figure 4 BB view; Figure 7 A schematic structural diagram of an anchor belt positioning base in a column according to an embodiment of the present invention; Figure 8 for Figure 7 CC view; Figure 9 for Figure 7 DD view; Figure 10 A schematic structural diagram of a positioning plate provided in an embodiment of the present invention; In the figure: 11. Pile foundation; 12. Cushion; 13. Column; 14. Column reinforcement; 15. Cap; 16. Cap ring beam reinforcement; 17. Cap formwork; 18. Spacer; 19. Steel pipe support; 21. Concrete structure; 22. Inverted L-shaped reinforcement; 23. Straight reinforcement; 24. Long straight reinforcement; 25. Shear groove; 26. Nail without cap; 31. Anchor strap; 32. Anchor plate; 33. Shear key; 41. Anchor strap calibration fixture; 42. Inner ring anchor strap positioning groove; 43. Outer ring anchor strap positioning groove; 44. Radial control line; 45. Circumferential control line; 46. Positioning point; 47. Hollow area; 5. Short reinforcement. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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 ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0020] like Figure 1 As shown, the concrete foundation for installing a cryogenic storage tank includes a pile foundation 11, a cushion layer 12, columns 13, and a cap 15. The cushion layer 12 is arranged on the pile foundation 11. The cap 15 is arranged above the cushion layer 12 through the columns 13. The cap 15 includes a cap platform and a cap ring beam arranged around the outermost circle of the cap platform. Two inner and outer ring anchor bands 31 are arranged on the cap ring beam to fix the inner and outer tank walls respectively. The inner and outer ring anchor bands 31 each include a plurality of anchor bands 31 evenly spaced along the circumference, and the inner and outer ring anchor bands 31 correspond to each other one by one, as shown in FIG. Figure 2 shown.

[0021] This embodiment provides a high-precision installation method for a cryogenic storage tank anchor strap 31, comprising the following steps: S1. Make anchor belt positioning base; S2. After the column reinforcement 14 is tied to the position of the cap 15 and the cap formwork 17 is completed, locate the installation positions of the inner and outer ring anchor belts 31 and fix the anchor belt positioning base at the installation position of the anchor belt 31; S3, tie the cap ring beam reinforcement 16, and install the inner and outer ring anchor belts 31 in the corresponding anchor belt positioning bases; S4. Calibrate the position of the anchor belt 31 and then fix the position of the anchor belt 31.

[0022] This embodiment makes an anchor belt positioning base and fixes the anchor belt positioning base at the installation position of the anchor belt 31, thereby putting the positioning work of the anchor belt 31 in front, which not only reduces the conflict with the installation and binding of the base ring beam steel bars 16, improves construction efficiency and flexibility, but also provides reliable support for the bottom of the anchor belt 31, and the position of the anchor belt 31 is less affected by subsequent work; and the method of the present invention is simple and fast, greatly reduces the work of measures, reduces the physical burden of the installers, does not need to rely on large tools, and improves the flexibility of the operation and the adaptability of the site.

[0023] Furthermore, in step S2, when the anchor band 31 is installed outside the column, an anchor band positioning base is used outside the column and fixed to the base plate 17. When the anchor band 31 is installed at the column, an anchor band positioning base is used inside the column and welded to the column reinforcement 14. This embodiment uses different anchor band positioning bases and fixing methods for the anchor bands 31 outside the column and at the column to prevent the anchor bands 31 from shifting during subsequent material loading and unloading and concrete pouring.

[0024] In some embodiments, the column outer anchor belt positioning base includes a concrete structure 21 and a limiting structure, wherein the bottom of the limiting structure is pre-buried in the concrete structure 21, and the four sides of the concrete structure 21 are fixed to the base template 17 by capless iron nails 26. The limiting structure is used to limit and position the position of the anchor belt 31. Since there is a base template 17 outside the column position to support it, the limiting structure is fixed by designing the concrete structure 21, and the concrete structure 21 is fixed to the base template 17 by capless iron nails 26, thereby fixing the limiting structure at the designed position outside the column range and ensuring the stability and firmness of the limiting structure. The column outer anchor belt positioning base is not only simple in structure, easy to process and low in cost, but also can improve the anti-interference ability of the anchor belt 31 and ensure the accuracy of the anchor belt 31.

[0025] like Figure 3-Figure 6 As shown, the concrete structure 21 of this embodiment is a rectangular parallelepiped structure, and six capless iron nails 26 are arranged at intervals along the circumferential direction around it, and the bottoms of the capless iron nails 26 are fixed to the positioning points of the base template 17; specifically, the capless iron nails 26 can be 50 mm long capless iron nails 26, two capless iron nails 26 are arranged on each side of the long side of the concrete structure 21, and one capless iron nail 26 is arranged on each side of the short side.

[0026] In some embodiments, the column anchor band positioning base includes a steel bar structure and a limiting structure. The bottom of the limiting structure is welded to the steel bar structure, and the steel bar structure is welded to the column reinforcement 14. The limiting structure is used to limit and locate the position of the anchor band 31. Because there is no bottom supporting template at the column position, the steel bar structure is fixed to the bottom of the limiting structure and connected to the column reinforcement 14 through the steel bar structure. This fixes the limiting structure at the designed position within the column range, ensuring the accuracy of the anchor band 31.

[0027] like Figure 7-Figure 9 As shown, the reinforcement structure of this embodiment includes two long straight steel bars 24, which are arranged in parallel and spaced apart. They are spot-welded to the bottom of the limiting structure, ensuring simultaneous spot-welding with the column reinforcement 14. Specifically, the column stirrups at the installation location of the column anchor band positioning base are fixed to the column formwork with spacers 18, and the column stirrups are spot-welded to the column main reinforcement to ensure that the anchor band 31 does not slide down after installation. The two long straight steel bars 24 of the column anchor band positioning base are then placed on the stirrups and spot-welded.

[0028] In this embodiment, before the pedestal ring beam reinforcement 16 is tied, the installation position of each anchor belt 31 is first located by a total station, and the installation position of the anchor belt 31 located outside the column position is marked on the pedestal template 17, and the installation position of the anchor belt 31 located at the column position is marked on the column reinforcement 14, and then the column outer anchor belt positioning base is fixed to the pedestal template 17 by capless iron nails 26 at the mark of the pedestal template 17, and the column inner anchor belt positioning base is fixed to the column stirrups by spot welding at the mark of the column reinforcement 14.

[0029] Furthermore, a shear groove 25 is provided at the top of the limiting structure; an anchor plate 32 is provided at the bottom of the anchor belt 31, and a shear key 33 is provided on the bottom surface of the anchor plate 32; in step S3, the anchor plate 32 is installed on the top surface of the limiting structure, and the shear key 33 is inserted into the shear groove 25. By inserting the shear key 33 at the bottom of the anchor belt 31 into the shear groove 25 at the top of the limiting structure, not only can the anchor belt 31 be accurately installed on the anchor belt positioning base, but the shear resistance of the structure can also be improved, preventing the anchor belt 31 from being damaged when subjected to shear forces, thereby extending the service life and safety of the structure.

[0030] In this embodiment, the top surface of the limiting structure is horizontal so that the anchor plate 32 at the bottom of the anchor belt 31 can be directly seated on it; and the width of the shear groove 25 where the shear key 33 is installed is consistent with the width of the shear key 33 at the bottom of the anchor belt 31, ensuring that the shear key 33 at the bottom of the anchor belt 31 can be smoothly inserted into the shear groove 25 of the limiting structure and form a tight fit, thereby ensuring the precise installation of the anchor belt 31 and improving the stability and shear resistance of the connection.

[0031] In some embodiments, the limiting structure includes a straight steel bar 23 and at least two pairs of inverted L-shaped steel bars 22 symmetrically arranged on either side of the straight steel bar 23. Each of the inverted L-shaped steel bars 22 is welded to the straight steel bar 23, and the shear grooves 25 are formed between the inverted L-shaped steel bars 22 on either side of the straight steel bar 23. The shear grooves 25 are formed by the symmetrically arranged pairs of inverted L-shaped steel bars 22, and all the inverted L-shaped steel bars 22 are spot-welded to the straight steel bars 23, thereby ensuring the integrity and stability of the limiting structure.

[0032] like Figure 5 and Figure 8 As shown, two pairs of inverted L-shaped steel bars 22 are symmetrically arranged on either side of the straight steel bars 23. The two inverted L-shaped steel bars 22 on each side are spaced apart. The horizontal portions of all inverted L-shaped steel bars 22 are aligned and flush, allowing the anchor plate 32 at the bottom of the anchor band 31 to rest directly on them. Furthermore, the bottoms of the vertical portions of all inverted L-shaped steel bars 22 at the outer column anchor band positioning base are pre-embedded in the concrete structure 21. The straight steel bars 23 at the inner column anchor band positioning base are perpendicularly arranged and spot-welded to the two long straight steel bars 24 of the reinforced concrete structure. Preferably, the anchor plate 32 at the bottom of the anchor band 31 is welded to the two pairs of inverted L-shaped steel bars 22, with at least two weld points.

[0033] In step S1, the method for making the anchor belt positioning base is: first, according to the design drawings, calculate the number of installation positions of the inner and outer ring anchor belts 31 located outside the column position and at the column position, and obtain the required number of outer column anchor belt positioning bases and inner column anchor belt positioning bases; then, according to the number of outer column anchor belt positioning bases and inner column anchor belt positioning bases, calculate and cut the inverted L-shaped steel bars 22, long straight steel bars 24 and straight steel bars 23, and then make the outer column anchor belt positioning base and the inner column anchor belt positioning base respectively.

[0034] Specifically, the process of making the column external anchor belt positioning base is as follows: the inverted L-shaped steel bars 22 are symmetrically arranged on both sides of the straight steel bars 23, and are spot-welded to the straight steel bars 23 respectively, and then the whole is placed in the template groove. After the size correction is completed, the concrete structure 21 is poured, and it is corrected again before initial setting. After the pouring is completed, the necessary concrete curing work is carried out. After the strength exceeds 70%, it can be put into use. The concrete of all the column external anchor belt positioning bases can be poured together.

[0035] Specifically, the process of making the anchor belt positioning base in the column is: arrange the inverted L-shaped steel bars 22 symmetrically on both sides of the straight steel bars 23, and spot weld them to the straight steel bars 23 respectively; arrange two long straight steel bars 24 at intervals below the straight steel bars 23 and perpendicular to the straight steel bars 23, and spot weld them to the straight steel bars 23.

[0036] In this embodiment, the concrete structure 21 has the same strength as the concrete of the cap 15 and can be cast on-site using C40 concrete. The inverted L-shaped bars 22 and the long straight bars 24 use ø12mm steel, while the straight bars 23 use ø25mm steel. Spot welding is performed by certified welders, with a weld length of at least 10mm. Welding quality is controlled, and the base height error is controlled within 1mm. If the vertical main reinforcement of some columns conflicts with the anchor strap 31 and its locating seat, the main reinforcement can be bent or cut. If cut, a new main reinforcement will need to be added to the column.

[0037] Furthermore, the method for calibrating the position of the anchor band 31 in step S4 is as follows: a total station is set up in the center of the cap 15, the radial position of each inner ring anchor band 31 is re-measured one by one, and the chord length of the inner ring anchor band 31, as well as the radial position and chord length of the outer ring anchor band 31, is calibrated using an anchor band calibration fixture 41. Specifically, after the cap ring beam reinforcement 16 and the column stirrups at the cap 15 are tied, a total station is set up in the center of the cap 15, the radial position of each inner ring anchor band 31 is re-measured one by one, and any anchor band 31 whose position deviation exceeds the required range is fine-tuned using an F wrench until it meets the requirement. One end of the anchor band calibration fixture 41 is clamped onto two adjacent inner ring anchor bands 31 whose radial positions have been calibrated, and the other end is clamped onto two adjacent outer ring anchor bands 31. The chord length of the inner ring anchor band 31, as well as the radial position and chord length of the outer ring anchor band 31, is calibrated. Anchor bands 31 whose position deviation exceeds the required range are fine-tuned using an F wrench until they meet the requirement, and then the position of the anchor band 31 is fixed.

[0038] like Figure 10 As shown, the anchor band calibration fixture 41 is provided with inner ring anchor band positioning grooves 42 for positioning the inner ring anchor band 31 and outer ring anchor band positioning grooves 43 for positioning the outer ring anchor band 31 on both radial side surfaces. In this embodiment, the inner ring anchor band positioning grooves 42 and outer ring anchor band positioning grooves 43 are provided on both radial side surfaces of the anchor band calibration fixture 41, respectively. The chord length between the two inner ring anchor band positioning grooves 42 is the designed chord length between adjacent inner ring anchor bands 31, and the chord length between the two outer ring anchor band positioning grooves 43 is the designed chord length between adjacent outer ring anchor bands 31. By clamping the anchor band calibration fixture 41 between adjacent anchor bands 31 on the inner and outer rings, both front and rear anchor bands 31 can be calibrated simultaneously, ensuring that the chord length between the two anchor bands 31 is within the designed range, thereby improving installation accuracy. The fixture has a simple structure, low cost, and a simple calibration method.

[0039] In this embodiment, the width of the inner ring anchor belt positioning groove 42 and the outer ring anchor belt positioning groove 43 matches the width of the anchor belt 31. Preferably, each side of the inner ring anchor belt positioning groove 42 and the outer ring anchor belt positioning groove 43 expands outward by 1 mm to provide a larger fault tolerance space for the installation of the anchor belt 31.

[0040] Furthermore, the anchor belt calibration fixture 41 is also provided with a radial control line 44 and a circumferential control line 45. Figure 10 As shown, the anchor strap calibration fixture 41 is provided with radial control lines 44 extending radially along the anchor strap calibration fixture 41 at the corresponding inner ring anchor strap positioning grooves 42 and outer ring anchor strap positioning grooves 43 of the front and rear rings. Circumferential control lines 45 extending circumferentially along the anchor strap calibration fixture 41 are provided at the inner ring anchor strap positioning grooves 42 and outer ring anchor strap positioning grooves 43 of the same ring. These two radial control lines 44 and two circumferential control lines 45 ensure precise positioning of the anchor strap 31 in the radial and circumferential directions, improving installation accuracy and efficiency. Preferably, a hollow area 47 is provided in the center of the anchor strap calibration fixture 41.

[0041] Furthermore, in step S4, the position of the anchor band 31 is fixed by placing four short steel bars 5 on the four sides of the anchor band 31 and welding the intersections of adjacent short steel bars 5 and the intersections of the short steel bars 5 with the cap ring beam reinforcement 16. In this embodiment, the anchor band 31 is fixed by placing the four short steel bars 5 on the four sides of the anchor band 31. At the same time, the intersections of the four short steel bars 5 and the intersections of the four short steel bars 5 with the cap ring beam reinforcement 16 are welded, so that the short steel bars 5 and the cap ring beam reinforcement 16 form a whole to restrict the position of the anchor band 31. This not only has a simple structure, is easy to install, and has a low cost, but also provides reliable support for the upper part of the anchor band 31, ensuring that the anchor band 31 will not move during the subsequent concrete pouring process. Among them, the short steel bars 5 specifically fix the position of the anchor band 31 on the top surface of the upper reinforcement of the cap ring beam. The short steel bars 5 are welded to the upper reinforcement of the cap ring beam, but the short steel bars 5 are not welded to the anchor band 31.

[0042] Furthermore, after step S4, step S5 is further included: tying the steel bars of the cap platform, and then recalibrating the position of the anchor straps 31. The method for recalibrating the position of the anchor straps 31 is the same as the method in step S4. The position of the anchor straps 31 that do not meet the requirements is adjusted, and then the concrete of the column and cap 15 is poured at the same time.

[0043] The following describes in detail the high-precision installation method of the low-temperature storage tank anchor belt 31 of the present invention through a specific embodiment.

[0044] A high-precision installation method for a cryogenic storage tank anchor strap 31 comprises the following steps: 1. Make the anchor belt positioning base: First, calculate the number of inner and outer ring anchor belts 31 located outside the column position and at the column position according to the design drawings, and obtain the required number of column outer anchor belt positioning bases and column inner anchor belt positioning bases; then calculate and cut the inverted L-shaped steel bars 22, long straight steel bars 24 and straight steel bars 23 according to the required number of column outer anchor belt positioning bases and column inner anchor belt positioning bases, and then make the column outer anchor belt positioning base and column inner anchor belt positioning base respectively, as shown in the figure. Figure 4-Figure 9 As shown; 2. After the pile foundation 11 and cushion layer 12 are constructed, the column reinforcement 14 is tied to the cushion layer 12, and the cap formwork 17 is built. After the column stirrups are tied to the cap 15 and the cap formwork 17 is built, the installation positions of the inner and outer ring anchor straps 31 are located using a total station, and the installation positions of the anchor straps 31 outside the column position are marked on the cap formwork 17. The installation positions of the anchor straps 31 at the column position are marked on the column reinforcement 14, and the anchor strap positioning bases are fixed at the installation positions of the anchor straps 31. When the installation position of the anchor belt 31 is outside the column position, the column outer anchor belt positioning base is used, and the column outer anchor belt positioning base is fixed to the base cap template 17 by the capless iron nail 26 at the mark of the base cap template 17; When the installation position of the anchor belt 31 is at the column position, the column anchor belt positioning base is used, and the two long straight steel bars 24 of the column anchor belt positioning base are fixed to the column stirrups by spot welding at the mark of the column steel bar 14; 3. Lay the upper and lower layers of steel bars of the cap ring beam and the column stirrups at the cap ring beam position, and promptly position the inner and outer ring anchor belts 31, inserting the shear key 33 at the bottom of the anchor belt 31 into the shear groove 25 of the anchor belt positioning base; 4. Set up a total station in the center of the cap 15, re-measure the radial position of each inner ring anchor band 31, and calibrate the chord length of the inner ring anchor band 31 and the radial position and chord length of the outer ring anchor band 31 using the anchor band calibration fixture 41. Use an F wrench to fine-tune the anchor band 31 whose position deviation exceeds the required range until it meets the requirements. Then, attach four short steel bars 5 to the four sides of the anchor band 31, and weld the intersections of adjacent short steel bars 5 and the intersections of the short steel bars 5 and the cap ring beam steel bars 16 to secure the position of the anchor band 31. 5. Tie the steel bars of the cap platform and recalibrate the position of the anchor straps 31. If the position deviation of the anchor straps 31 exceeds the required range, use an F wrench to fine-tune it until it meets the requirements. Then, pour concrete for the columns and cap 15 to complete the foundation platform construction.

[0045] Before the secondary adjustment using the method of this embodiment, the qualified rate of the radial deviation of the anchor belt 31 of ±6mm is 96%, and the qualified rate of the chord length deviation of ±6mm is 100%; after the secondary adjustment, the qualified rate of the radial deviation of the anchor belt 31 of ±6mm and the qualified rate of the chord length deviation of ±6mm before concrete pouring both reach 100%.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high-precision installation method for a cryogenic storage tank anchor strap, characterized in that: The steps include: S1. Make anchor belt positioning base; S2. After the column reinforcement is tied to the pedestal position and the pedestal formwork is completed, locate the installation positions of the inner and outer ring anchor belts and fix the anchor belt positioning base at the installation position of the anchor belts; S3. Tie the steel bars of the cap ring beam and install the inner and outer ring anchor belts in the corresponding anchor belt positioning bases; S4. Calibrate the position of the anchor belt and then fix the position of the anchor belt.

2. The high-precision installation method for a cryogenic storage tank anchor strap according to claim 1, characterized in that: In step S2, when the installation position of the anchor belt is outside the column position, the outer column anchor belt positioning base is used, and the outer column anchor belt positioning base is fixed on the base template; when the installation position of the anchor belt is at the column position, the inner column anchor belt positioning base is used, and the inner column anchor belt positioning base is welded to the column steel bar.

3. The high-precision installation method for a cryogenic storage tank anchor strap according to claim 2, characterized in that: The column outer anchor belt positioning base includes a concrete structure and a limiting structure. The bottom of the limiting structure is pre-embedded in the concrete structure, and the four sides of the concrete structure are fixed to the base template by capless iron nails.

4. The high-precision installation method for a cryogenic storage tank anchor strap according to claim 2, characterized in that: The column inner anchor belt positioning base includes a steel bar structure and a limiting structure. The bottom of the limiting structure is welded to the steel bar structure, and the steel bar structure is welded to the column steel bar.

5. The high-precision installation method for a cryogenic storage tank anchor strap according to claim 3 or 4, characterized in that: A shear groove is provided on the top of the limiting structure; an anchor plate is provided at the bottom of the anchor belt, and a shear key is provided on the bottom surface of the anchor plate; in step S3, the anchor plate is installed on the top surface of the limiting structure, and the shear key is inserted into the shear groove.

6. The high-precision installation method for a cryogenic storage tank anchor strap according to claim 5, characterized in that: The limiting structure includes a straight steel bar and at least two pairs of inverted L-shaped steel bars symmetrically arranged on both sides of the straight steel bar, and each of the inverted L-shaped steel bars is welded to the straight steel bar, and the shear groove is formed between the inverted L-shaped steel bars on both sides of the straight steel bar.

7. The high-precision installation method for a cryogenic storage tank anchor strap according to claim 1, characterized in that: The method for calibrating the position of the anchor belt in step S4 is: setting up a total station in the center of the platform, re-measure the radial position of the inner ring anchor belt one by one, and calibrate the chord length of the inner ring anchor belt and the radial position and chord length of the outer ring anchor belt by using an anchor belt calibration fixture.

8. The high-precision installation method for a cryogenic storage tank anchor strap according to claim 7, characterized in that: The two radial side surfaces of the anchor belt calibration fixture are both provided with an inner ring anchor belt positioning groove for positioning the inner ring anchor belt and an outer ring anchor belt positioning groove for positioning the outer ring anchor belt.

9. The high-precision installation method for a cryogenic storage tank anchor strap according to claim 1, characterized in that: In step S4, the position of the anchor belt is fixed by placing four short steel bars on the four sides of the anchor belt respectively and welding the intersections of adjacent short steel bars and the intersections of the short steel bars and the steel bars of the cap ring beam.

10. The high-precision installation method for a cryogenic storage tank anchor strap according to claim 1, characterized in that: After step S4, the method further includes step S5: tying the steel bars of the foundation platform, and then calibrating the position of the anchor belt again.

Images