Adjusting device for steel pipe arch installation

Abstract

The utility model provides an adjusting device for installing a steel pipe arch, which is arranged on a temporary buttress, is used for adjusting the position and the angle of the steel pipe arch so as to facilitate the butt joint of adjacent steel pipe arches, and comprises a first supporting piece on which the steel pipe arch is supported; the first supporting piece comprises a three-dimensional lifting platform and a direction adjusting platform, the direction adjusting platform comprises a U-shaped base, a U-shaped bearing seat, a first stepping motor and a bearing roller, the U-shaped base is arranged on a moving platform of the three-dimensional lifting platform, and the two ends of the U-shaped bearing seat are rotationally connected with the two ends of the U-shaped base through rotating shafts; the two ends of the U-shaped base are each provided with a first stepping motor, and the output ends of the two first stepping motors are in transmission connection with the two rotating shafts correspondingly. The steel pipe arch is arranged in a groove of the U-shaped bearing seat and is in rolling connection with the plurality of bearing rollers; the problems that when traditional steel pipe arch sections are spliced, accumulative errors are large, the requirements can be met only after repeated measurement and adjustment are conducted for multiple times, construction efficiency is low, and the construction period is long are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction equipment, in particular to an adjusting device for installing a steel pipe arch. Background Art

[0002] The arch rib of the steel tube concrete simply supported arch is a form of steel-concrete structure. In analyzing its overall stress, it is concluded that fully filling the steel tube with concrete can improve the structural compressive stability as a new whole than a single steel tube or concrete structure. At the same time, it also enhances the durability and corrosion resistance of the steel tube. The steel tube wall acts as a hoop for the filled concrete, effectively enhancing the ductility and compressive strength of the concrete itself, making the arch bridge appear very reasonable when it is mainly subjected to stress.

[0003] The arch rib of a steel tube simply supported arch bridge (steel tube arch for short) is a secondary parabolic steel structure. Therefore, the arch rib is prone to elastic deformation and welding shrinkage deformation during erection, which affects the arch rib forming linearity, central axis and flatness of the arch rib. As the span of the arch rib increases, it is affected by its own weight and generally has more segments to assemble. After the traditional crawler crane is used to assemble the steel frame, the arch rib has a large cumulative error, which affects the quality of the arch rib joint. In order to ensure the construction quality and progress, the assembly accuracy of each segment of the arch rib must be guaranteed to reduce the cumulative error. In addition, the docking position is measured and adjusted multiple times during the assembly process to improve the accuracy, which is time-consuming and has great pressure on the construction period. Utility Model Content

[0004] The utility model aims to provide an adjusting device for steel pipe arch installation, which solves the problems that when assembling traditional steel pipe arch segments, the cumulative error is large and the requirements can only be met after repeated measurements and adjustments, resulting in low construction efficiency and long construction period.

[0005] The embodiment of the utility model is realized by the following technical scheme: an adjusting device for installing a steel pipe arch, which is arranged on a temporary pier and is used to adjust the position and angle of the steel pipe arch, thereby facilitating the docking of adjacent steel pipe arches, and comprises a first support member, on which the steel pipe arch is supported;

[0006] The first support member includes a three-dimensional lifting platform and an azimuth adjustment platform, wherein the azimuth adjustment platform is arranged on the mobile platform of the three-dimensional lifting platform, and the three-dimensional lifting platform is arranged on the temporary pier;

[0007] The azimuth adjustment platform comprises a U-shaped base, a U-shaped receiving seat, a first stepper motor and a receiving roller. The U-shaped base is arranged with its opening facing upward on the mobile platform of the three-dimensional lifting platform. The U-shaped receiving seat is coaxially arranged in the groove of the U-shaped base. The two ends of the U-shaped receiving seat are rotatably connected with the two ends of the U-shaped base through a rotating shaft. The first stepper motor is arranged at both ends of the U-shaped base. The output ends of the two first stepper motors are respectively connected to the two rotating shafts in a transmission manner.

[0008] The U-shaped receiving seat is rotatably provided with a plurality of receiving rollers, which are distributed in a semicircular shape, and the axial direction of the receiving rollers is perpendicular to the rotation direction of the U-shaped receiving seat; the steel pipe arch is placed in the groove of the U-shaped receiving seat and is rollingly connected with a plurality of receiving rollers.

[0009] Furthermore, it also includes a U-shaped fixing seat, which is connected to the U-shaped receiving seat in a circular shape, and a plurality of receiving rollers are rotatably arranged on the U-shaped fixing seat, and the plurality of receiving rollers on the U-shaped fixing seat are rollingly connected to the steel pipe arch.

[0010] Furthermore, it also includes a second support member, the second support member has the same structure as the first support member, and the first support member and the second support member are respectively connected to two ends of the steel pipe arch.

[0011] Furthermore, it also includes a second stepper motor, the U-shaped receiving seat is provided with the second stepper motor, and the output end of the second stepper motor is drivingly connected to one of the receiving rollers.

[0012] Furthermore, there are a plurality of second stepper motors.

[0013] Furthermore, the receiving roller is covered with a rubber sleeve.

[0014] Furthermore, it also includes a compensation pier, which is arranged at the bottom of the first support member or the second support member.

[0015] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0016] 1. When installing some steel tube arches with smaller size and weight, only the first support member can be set on the temporary pier, the steel tube arch is placed in the U-shaped receiving seat and fixed by the U-shaped fixing seat, the steel tube arch is initially set in an approximate position, and then the three-dimensional lifting platform is used to drive the steel tube arch to move forward and backward, left and right, and up and down, and the first stepper motor is used to drive the U-shaped fixing seat and the U-shaped receiving seat to rotate, thereby driving the two ends of the steel tube arch to tilt up and down within the range of one end, and the second stepper motor can also be used to adjust the arc position of the steel tube arch, usually making the notch of the steel tube arch vertically downward and collinear with other steel tube arches to form a bridge arch, combined with total station measurement, to achieve fine adjustment of the steel tube arch, the adjustment method is simple and fast, which greatly improves the installation efficiency, and the easy-to-adjust method also greatly improves the overall assembly accuracy.

[0017] 2. When the steel tube arch is relatively heavy, in addition to the first support member, a second support member is also provided on the temporary pier. The second support member has the same structure as the first support member. The first support member and the second support member are respectively connected to the two ends of the steel tube arch to preliminarily realize the positioning of the steel tube arch. Then, the first support member and the second support member cooperate with each other to make fine adjustments to adjust the spatial position and orientation of the steel tube arch. Combined with the total station measurement, the position of the steel tube arch can be quickly adjusted, which greatly improves the installation accuracy and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the structure of a steel pipe arch installation adjustment device provided by the utility model, which is arranged on each temporary pier when installing the steel pipe arch;

[0020] Figure 2 A structural schematic diagram of a first embodiment of a steel pipe arch installation adjusting device provided by the utility model;

[0021] Figure 3 for Figure 1 A magnified schematic diagram of the structure at center A;

[0022] Figure 4 This is a structural schematic diagram of a second embodiment of a steel pipe arch installation adjustment device provided by the utility model;

[0023] Icons: 1. Temporary pier, 2. Steel pipe arch, 3. First support member, 31. Three-dimensional lifting platform, 32. Azimuth adjustment platform, 321. U-shaped base, 322. U-shaped receiving seat, 323. First stepper motor, 324. Receiving roller, 325. Rotating shaft, 326. U-shaped fixed seat, 327. Second stepper motor, 328. Rubber ring, 4. Second support member, 5. Compensating pier. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Embodiment 1:

[0027] Reference Figure 1 to Figure 2 As shown, this embodiment provides a steel pipe arch installation adjustment device, which is arranged on a temporary pier 1 and is used to adjust the position and angle of the steel pipe arch 2, thereby facilitating the docking of adjacent steel pipe arches 2, and includes a first support member 3, on which a steel pipe arch 2 is supported, and the first support member 3 is arranged at the center of gravity of the steel pipe arch 2;

[0028] More specifically, the first support member 3 includes a three-dimensional lifting platform 31 and an azimuth adjustment platform 32. The azimuth adjustment platform 32 is arranged on a mobile platform of the three-dimensional lifting platform 31. The three-dimensional lifting platform 31 is arranged on the temporary pier 1. The three-dimensional lifting platform 31 drives the steel pipe arch 2 to move in the space in horizontal, horizontal and vertical directions.

[0029] like Figure 2As shown, the azimuth adjustment platform 32 includes a U-shaped base 321, a U-shaped receiving seat 322, a first stepper motor 323 and a receiving roller 324. The U-shaped base 321 is opened upward and is arranged on the mobile platform of the three-dimensional lifting platform 31. The U-shaped receiving seat 322 is coaxially arranged in the groove of the U-shaped base 321. The two ends of the U-shaped receiving seat 322 are rotatably connected with the two ends of the U-shaped base 321 through a rotating shaft 325. The two ends of the U-shaped base 321 are both provided with a first stepper motor 323, and the output ends of the two first stepper motors 323 are respectively connected to the two rotating shafts 325.

[0030] The U-shaped receiving seat 322 is rotatably provided with a plurality of receiving rollers 324, which are distributed in a semicircle, and the axial direction of the receiving rollers 324 is perpendicular to the rotation direction of the U-shaped receiving seat 322; the steel pipe arch 2 is placed in the groove of the U-shaped receiving seat 322 and is rollingly connected with the plurality of receiving rollers 324, so that the steel pipe arch 2 can rotate along its axis.

[0031] It also includes a U-shaped fixing seat 326, which is connected to the U-shaped receiving seat 322 in a circular shape. One end of the U-shaped fixing seat 326 is hinged to the U-shaped receiving seat 322, and the other end is fixed to each other by bolts. A plurality of receiving rollers 324 are rotatably arranged on the U-shaped fixing seat 326. The plurality of receiving rollers 324 on the U-shaped fixing seat 326 are rollingly connected to the steel pipe arch 2, thereby fixing the steel pipe arch 2 to the U-shaped receiving seat 322.

[0032] It also includes a second stepper motor 327. The U-shaped receiving seat 322 is provided with the second stepper motor 327. The output end of the second stepper motor 327 is transmission-connected to a receiving roller 324. At the same time, there are several second stepper motors 327, which are used to drive the steel tube arch 2 to rotate along its axis, and then adjust the orientation of the end of the steel tube arch 2 so that the steel tube arch 2 is in line with the steel tube arches 2 at both ends.

[0033] More specifically, a rubber sleeve 328 is sleeved on the receiving roller 324 to protect the steel pipe arch 2 and increase the friction force in contact with the steel pipe arch 2 .

[0034] To sum up, in the specific implementation, when installing some steel tube arches 2 with smaller size and weight, only the first support member 3 can be set on the temporary pier 1, and the steel tube arch 2 is placed in the U-shaped receiving seat 322 and fixed by the U-shaped fixing seat 326. The steel tube arch 2 is initially set at an approximate position, and then the three-dimensional lifting platform 31 is used to drive the steel tube arch to move forward and backward, left and right, and up and down, and the first stepper motor 323 is used to drive the U-shaped fixing seat 326 and the U-shaped receiving seat 322 to rotate, thereby driving the two ends of the steel tube arch 2 to tilt up and down within the range of one end. At the same time, the arc position of the steel tube arch 2 can also be adjusted by the second stepper motor 327, usually making the notch of the steel tube arch 2 vertically downward and collinear with other steel tube arches 2 to form a bridge arch, combined with total station measurement, to achieve fine adjustment of the steel tube arch 2, the adjustment method is simple and fast, which greatly improves the installation efficiency, and the easy-to-adjust method also greatly improves the overall assembly accuracy.

[0035] Embodiment 2:

[0036] As another implementation of Example 1, Figure 1 , 3 As shown in 4, when the steel tube arch 2 is relatively thick and heavy, in addition to the first support member 3, the temporary pier 1 is also provided with a second support member 4. The second support member 4 has the same structure as the first support member 3. The first support member 3 and the second support member 4 are respectively connected to the two ends of the steel tube arch 2 to preliminarily realize the positioning of the steel tube arch 2. Then, the first support member 3 and the second support member 4 cooperate to make fine adjustments to adjust the spatial position and orientation of the steel tube arch 2. Combined with the total station measurement, the position of the steel tube arch 2 can be quickly adjusted, which greatly improves the installation accuracy and efficiency.

[0037] It should be noted that when using the second embodiment, the U-shaped receiving seat 322 can be roughly adjusted to a state perpendicular to the contact point of the steel tube arch through the second stepper motor 327, so as to facilitate the temporary placement of the steel tube arch 2. Although there is no U-shaped fixing portion 326, the steel tube arch 2 has its own weight and the structure supported on both sides, and it is installed from both sides to the middle during installation, that is, the upper steel tube arch 2 is limited at the oblique bottom of the current steel tube arch 2, and it will not fall if adjusted within a reasonable range. At the same time, after the current steel tube arch 2 is hoisted up, the connection with the crane hook needs to be removed after the current steel tube arch 2 is installed to prevent the steel tube arch 2 from slipping.

[0038] More specifically, Figure 1 As shown, it also includes a compensation pier 5, which is arranged at the bottom of the first support member 3 or the second support member 4, and is used to compensate for the height of the first support member 3 or the second support member 4 when the steel tube arch 2 is installed with relatively large inclination angles on both sides, thereby achieving support for both ends of the steel tube arch 2.

[0039] Installation of steel tube arch 2: Install the first two sections of steel tube arch in the direction of large mileage, at this time the crawler crane is located outside the ramp. Set up the remaining temporary piers 1, install the third section of steel tube arch 2 in the direction of small mileage, at this time the crawler crane is located between the two ramps. Install the third section of steel tube arch 2 in the direction of large mileage, at this time the crawler crane is located in the direction of large mileage of the bridge outside the ramp. Install the closing section steel tube arch 2, at this time the crawler crane is located in the direction of large mileage of the bridge outside the ramp. Leave a gap between the closing section and the front end of the arch sections on both sides according to the design requirements, install a code plate in the main chord tube at the gap for temporary positioning and locking, and finally implement electric welding consolidation. The construction sequence of the closing section is: accurately measure the net distance between the front ends of the arch sections on both sides → cut and correct the length of the processed closing section according to the measurement data → lift it into place → install the circumferential butt lining ring → temporarily consolidate when the temperature is stable → weld and close.

[0040] When the total station is used to measure the coordinates of the steel tube arch 2, the control target is to monitor the spatial coordinates of the arch rib to ensure that the arch rib axis is close to the design state linear shape after the bridge is completed. The arch rib linear monitoring section selects the eighth point position of the two arch ribs, and the measuring points are arranged horizontally on the outer side of the upper and lower steel tubes for easy observation.

[0041] The instrument is set up on the front and rear piers of the beam span, looking back at the reference control point, and then aiming at the prism of the corresponding measuring point on the arch rib to measure the three-dimensional coordinates of the arch rib measuring point. Since the linear shape is sensitive to temperature and sunshine, the measurement time should be selected before sunrise when the temperature is relatively constant, that is, the observation work should be completed before sunrise in the morning, and the measurement time should be controlled within 2 hours, and detailed records should be made; after the installation of each segment of the arch rib is completed, the construction of the next segment can be carried out only after the monitoring work is completed and the results are confirmed to be correct, and the arch rib linear shape is measured regularly, and the arch rib linear shape diagram is drawn and compared with the designed arch rib linear shape to guide the on-site adjustment. Strictly follow the "forecast-measurement-identification-correction-forecast" cycle control process to ensure the safety of the structure during construction, reasonable internal force and beautiful appearance.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A steel pipe arch installation adjustment device, arranged on a temporary pier (1), for adjusting the position and angle of a steel pipe arch (2), thereby facilitating the docking of adjacent steel pipe arches (2), characterized in that: It comprises a first support member (3), on which the steel pipe arch (2) is supported; The first support member (3) comprises a three-dimensional lifting platform (31) and an azimuth adjustment platform (32), wherein the azimuth adjustment platform (32) is arranged on a mobile platform of the three-dimensional lifting platform (31), and the three-dimensional lifting platform (31) is arranged on the temporary buttress (1); The azimuth adjustment platform (32) comprises a U-shaped base (321), a U-shaped receiving seat (322), a first stepper motor (323) and a receiving roller (324); the U-shaped base (321) is arranged with its opening facing upward on the mobile platform of the three-dimensional lifting platform (31); the U-shaped receiving seat (322) is coaxially arranged in a groove of the U-shaped base (321); the two ends of the U-shaped receiving seat (322) are rotatably connected to the two ends of the U-shaped base (321) via a rotating shaft (325); the first stepper motor (323) is arranged at both ends of the U-shaped base (321); the output ends of the two first stepper motors (323) are respectively transmission-connected to the two rotating shafts (325); The U-shaped receiving seat (322) is rotatably provided with a plurality of receiving rollers (324), the plurality of receiving rollers (324) are distributed in a semicircular shape, and the axial direction of the receiving rollers (324) is perpendicular to the rotation direction of the U-shaped receiving seat (322); the steel pipe arch (2) is placed in the groove of the U-shaped receiving seat (322) and is rollingly connected with a plurality of receiving rollers (324).

2. The steel pipe arch installation adjustment device according to claim 1, characterized in that: It also includes a U-shaped fixing seat (326), wherein the U-shaped fixing seat (326) is connected to the U-shaped receiving seat (322) in a circular shape, and a plurality of receiving rollers (324) are rotatably arranged on the U-shaped fixing seat (326), and the plurality of receiving rollers (324) on the U-shaped fixing seat (326) are rollingly connected to the steel pipe arch (2).

3. The adjusting device for installing a steel pipe arch according to claim 1, characterized in that: It also comprises a second support member (4), the second support member (4) having the same structure as the first support member (3), and the first support member (3) and the second support member (4) are respectively connected to two ends of the steel tube arch (2).

4. A steel pipe arch installation adjustment device according to any one of claims 2 or 3, characterized in that: It also includes a second stepper motor (327). The U-shaped receiving seat (322) is provided with the second stepper motor (327). The output end of the second stepper motor (327) is drivingly connected to one of the receiving rollers (324).

5. The adjusting device for installing a steel pipe arch according to claim 4, characterized in that: There are a plurality of second stepping motors (327).

6. The adjusting device for installing a steel pipe arch according to claim 5, characterized in that: The receiving roller (324) is sleeved with a rubber sleeve (328).

7. The steel pipe arch installation adjustment device according to claim 3, characterized in that: It also comprises a compensation pier (5), which is arranged at the bottom of the first support member (3) or the second support member (4).

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