A three-dimensional posture adjustment system and adjustment method for arch column foot of large-span arch bridge

Abstract

The application discloses a three-dimensional posture adjusting system and adjusting method for a large-span arch bridge arch upstand column foot, the system comprises a support deck, a three-way displacement jack mechanism, a displacement adjusting platform and a column foot fixing kit, the system can adjust the translation and rotation in each direction respectively, so that the adjusting process is more refined and efficient. Through the adjustment of the system, the arch upstand column foot can quickly and accurately reach the target posture, and the adjustment accuracy of the bolted arch upstand column bolted column foot is met. The application proposes an accurate adjusting method based on the system, and the specific adjusting method steps are clear. After the adjusting steps are completed according to the requirements, the accurate control of the three-dimensional posture of the arch upstand column foot is completed, repeated adjustment is avoided, the installation and construction efficiency of the large-span arch bridge arch upstand column foot is improved, and the labor and safety management costs are saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge construction engineering, in particular to a large-span arch bridge arch column foot three-dimensional posture adjustment system and adjustment method. BACKGROUND

[0002] The arch column of a large-span arch bridge is an important component for transmitting the load of the driving lane to the main arch ring. The arch column is divided into a column foot and a column body. Bolt connection (referred to as "bolt connection") is a connection method between bridge components, which is favored by bridge engineers due to its standardization, rapid construction, and green construction. In the arch column of a large-span arch bridge, the upper part of the column foot needs to be bolted with the subsequent column body. Since the relative position relationship of the bolt hole groups is determined, if the three-dimensional posture of the arch column foot cannot reach the target value, the linear error of the subsequent column body will further diverge, which will easily cause the linear shape of the arch column to lose control. Therefore, in the construction process, it is of great engineering application value to quickly and accurately adjust the spatial three-dimensional posture of the arch column foot of the arch bridge to ensure the controllability of the linear shape of the subsequent column.

[0003] The existing arch column foot of an arch bridge is mainly adjusted in posture by means of external rope tensioning and relaxation, hand-operated hoists, and a small number of single-point jacks. However, the following problems exist in the process of fine adjustment of the three-dimensional posture of the arch column foot of a large-span arch bridge using the following methods:

[0004] 1. Due to the particularity of bolt connection, the three-dimensional precision of the arch column foot of a large-span arch bridge is required to be high to avoid difficulty in controlling the installation precision of the subsequent column body. However, the existing adjustment method lacks sufficient refinement, which makes it impossible to accurately complete the three-dimensional posture fine adjustment of the column foot;

[0005] 2. The existing adjustment method cannot adjust the translation and rotation in each direction separately, and the adjustment process is accidental and inefficient;

[0006] 3. The existing adjustment method has unclear implementation steps, and the operator needs to adjust back and forth according to the site measurement points, without a clear adjustment process, which cannot guarantee the construction precision and time.

[0007] Therefore, in view of the above problems, a new three-dimensional posture adjustment system and adjustment method for the arch column foot of a large-span arch bridge are needed to solve the problems of insufficient refinement of the existing adjustment method, unclear adjustment amount in each direction, and unclear implementation steps, so as to meet the requirements of accurate and rapid installation of the arch column foot of a large-span arch bridge. SUMMARY

[0008] In view of the deficiencies of the prior art, the present application provides a large-span arch bridge arch column foot three-dimensional posture adjustment system to solve the problems of unclear adjustment amount in each direction and unclear implementation steps of the prior adjustment method, meet the requirements of accurate and rapid installation of the large-span arch bridge arch column foot, thereby improving the construction efficiency, saving labor and safety management cost, ensuring the construction quality, and reducing the safety operation risk.

[0009] To solve the above technical problems, the present application adopts the following technical solutions:

[0010] A large-span arch bridge arch column foot three-dimensional posture adjustment system, comprising a support platform, a three-direction displacement jack mechanism, a displacement adjustment platform and a column foot fixing kit.

[0011] The support platform is fixedly connected to the main arch rib of the large-span arch bridge and provides structural support for the displacement adjustment platform and the column foot fixing kit; the displacement adjustment platform is installed above the support platform by the three-direction displacement jack mechanism, so that the displacement adjustment platform can have three-direction displacement in the horizontal transverse direction, the horizontal longitudinal direction and the vertical direction relative to the support platform, and the middle part of the displacement adjustment platform is provided with a through hole through which the column foot of the column passes; the column foot fixing kit is installed on the displacement adjustment platform by a rotating connection structure and located at a position directly above the through hole, and the rotating axis of the column foot fixing kit is vertically arranged and coincides with the central axis of the through hole, so that the column foot fixing kit can be fixedly connected with the column foot passing through the through hole.

[0012] In the above large-span arch bridge arch column foot three-dimensional posture adjustment system, as a preferred solution, the displacement adjustment platform is installed above the support platform by four three-direction displacement jack mechanisms, and the four three-direction displacement jack mechanisms support the four corners of the displacement adjustment platform, respectively.

[0013] Each three-direction displacement jack mechanism comprises a vertical jack, a horizontal jack and a longitudinal jack; wherein,

[0014] The base of the longitudinal jack is fixed on the support platform, the jacking end of the longitudinal jack is horizontally and longitudinally arranged and connected with a longitudinal sliding table on the support platform, and the longitudinal sliding table can reciprocate along the horizontal longitudinal direction under the driving of the jacking end of the longitudinal jack.

[0015] The base of the horizontal jack is fixed on the longitudinal sliding table, the jacking end of the horizontal jack is horizontally and transversely arranged and connected with a horizontal sliding table on the longitudinal sliding table, and the horizontal sliding table can reciprocate along the horizontal transverse direction under the driving of the jacking end of the horizontal jack.

[0016] The base of the vertical jack is fixed on the transverse sliding table, and the pushing end of the vertical jack is arranged vertically and connected with the displacement adjustment platform, so that the displacement adjustment platform can be lifted along the vertical direction under the driving of the pushing end of the vertical jack.

[0017] In the above large-span arch bridge arch column foot three-dimensional posture adjustment system, as a preferred solution, the upper surface of the displacement adjustment platform is also provided with two levels, and the arrangement directions of the two levels are perpendicular to each other along the upper surface of the displacement adjustment platform; the plane where the upper surface of the displacement adjustment platform is located is perpendicular to the central axis of the through hole.

[0018] In the above large-span arch bridge arch column foot three-dimensional posture adjustment system, as a preferred solution, the column foot fixing sleeve includes a column foot fixing sleeve with a rectangular cross section, and the cross section of the column foot fixing sleeve matches the cross section of the column foot, so that the column foot can be inserted into the column foot fixing sleeve; a plurality of connecting hole groups are arranged on the side wall of the column foot fixing sleeve, and the arrangement positions of the connecting hole groups can correspond to the positions of the bolt holes on the top of the column foot; a plurality of groups of pulley supports extending downward are arranged on the bottom of the column foot fixing sleeve, and the lower ends of the pulley supports are provided with rotatable pulleys.

[0019] In the above large-span arch bridge arch column foot three-dimensional posture adjustment system, as a preferred solution, the rotating connection structure between the column foot fixing sleeve and the displacement adjustment platform includes:

[0020] A circular ring groove is arranged on the upper surface of the displacement adjustment platform at a position outside the periphery of the through hole, and the center of the circular ring groove coincides with the central axis of the through hole; the column foot fixing sleeve can be embedded in the circular ring groove on the upper surface of the displacement adjustment platform through the pulley supports distributed on the bottom of the column foot fixing sleeve, so that the column foot fixing sleeve can rotate around the vertical rotation axis coinciding with the central axis of the through hole.

[0021] Correspondingly, the application also provides a large-span arch bridge arch column foot three-dimensional posture adjustment construction method, which includes the following steps:

[0022] S1, marking the center coordinates of the target installation position of the arch column foot on the main arch rib of the large-span arch bridge, and fixing the support platform of the large-span arch bridge arch column foot three-dimensional posture adjustment system on the main arch rib, so that the adjustment range of the center coordinates and the transverse position of the large-span arch bridge arch column foot three-dimensional posture adjustment system after installation can cover the center coordinates and the transverse position of the target installation position of the arch column foot.

[0023] S2, hoist the column foot to be assembled and make it pass through the through hole in the middle of the displacement adjustment platform in the three-dimensional posture adjustment system of the arch column foot of the long-span arch bridge, and fix the column foot and the column foot fixing sleeve, so that the central axis of the column foot coincides with the central axis of the through hole;

[0024] S3, adjust the horizontal posture of the displacement adjustment platform in the three-dimensional posture adjustment system of the arch column foot of the long-span arch bridge, so that the central axis of the column foot is adjusted to a vertical state;

[0025] S4, adjust the three-dimensional spatial position of the displacement adjustment platform in the three-dimensional posture adjustment system of the arch column foot of the long-span arch bridge, so that the three-dimensional spatial position of the column foot is adjusted to the target installation position of the arch column foot marked on the main arch rib;

[0026] S5, weld the column foot and the main arch rib, and after the welding construction is completed, disassemble the three-dimensional posture adjustment system of the arch column foot of the long-span arch bridge.

[0027] In the above three-dimensional posture adjustment construction method of the arch column foot of the long-span arch bridge, as a preferred scheme, in S1, the process of installing the three-dimensional posture adjustment system of the arch column foot of the long-span arch bridge specifically includes:

[0028] S101, weld a support platform on the main arch rib of the long-span arch bridge, and take the center coordinates of the target installation position of the arch column foot marked on the main arch rib of the long-span arch bridge as the center point, so as to serve as the support pile cap of the three-dimensional posture adjustment system of the arch column foot of the long-span arch bridge;

[0029] S102, arrange a three-way displacement jack mechanism on the support pile cap, and weld the bottom of the three-way displacement jack mechanism and the support pile cap, then place an installation displacement adjustment platform on the three-way displacement jack mechanism, so that the displacement adjustment platform is installed above the support pile cap through the three-way displacement jack mechanism;

[0030] The displacement adjustment platform is installed above the support pile cap through four three-way displacement jack mechanisms, and the four three-way displacement jack mechanisms respectively support the four corners of the displacement adjustment platform; and the adjustment range of the central coordinates and the transverse position of the three-way displacement jack mechanism adjusting the central coordinates of the displacement adjustment platform can cover the central coordinates and the transverse position of the target installation position of the arch column foot;

[0031] S103, the column foot fixing sleeve is installed on the displacement adjustment platform through the rotating connection structure and is located at a position directly above the through hole, and the rotating axis of the column foot fixing sleeve is vertically arranged and coincides with the central axis of the through hole; thereby, the construction of the three-dimensional posture adjustment system of the column foot of the arch column of the long-span arch bridge is completed, and the adjustment range of the central coordinates and the transverse position of the three-dimensional posture adjustment system of the column foot of the arch column of the long-span arch bridge can cover the central coordinates and the transverse position of the target installation position of the column foot of the arch column.

[0032] In the three-dimensional posture adjustment construction method of the column foot of the arch column of the long-span arch bridge, as a preferred solution, the column foot fixing sleeve includes a column foot fixing sleeve with a rectangular cross section, and the cross-sectional rectangular size of the column foot fixing sleeve matches the cross-sectional rectangular size of the column foot of the arch column, so that the column foot of the arch column can be inserted into the column foot fixing sleeve; a plurality of connecting holes are arranged on the side wall of the column foot fixing sleeve, and the arrangement position of the connecting holes can correspond to the bolt hole group position on the top periphery of the column foot of the arch column.

[0033] In the S2, the specific way of fixing and connecting the column foot and the column foot fixing sleeve is that a plurality of bolt rods are inserted through the connecting hole group on the side wall of the column foot fixing sleeve and are respectively screwed and fixed on the bolt hole group on the top periphery of the column foot of the arch column, so that the column foot to be assembled and the column foot fixing sleeve are fixedly connected.

[0034] In the three-dimensional posture adjustment construction method of the column foot of the arch column of the long-span arch bridge, as a preferred solution, two levels are installed on the upper surface of the displacement adjustment platform, and the arrangement directions of the two levels are perpendicular to each other along the upper surface of the displacement adjustment platform; the central axis of the through hole of the displacement adjustment platform is perpendicular to the plane of the upper surface of the displacement adjustment platform.

[0035] The S3 is specifically adjusting the horizontal position of the displacement adjustment platform by adjusting the support height of each three-way displacement jack mechanism, so that when the two levels on the upper surface of the displacement adjustment platform are both in a horizontal state, it indicates that the central axis of the column foot has been adjusted to a vertical state.

[0036] In the three-dimensional posture adjustment construction method of the column foot of the arch column of the long-span arch bridge, as a preferred solution, the S4 specifically includes:

[0037] S401, a plurality of measuring points are selected on the column foot in advance, and based on the central coordinates and the transverse position of the target installation position of the column foot of the arch column, the positions of the measuring points when the column foot is installed to the target position are taken as the target positions of the measuring points, and the three-dimensional coordinate difference between the current positions of the measuring points and the target positions of the measuring points is calculated respectively.

[0038] S402, by adjusting the horizontal orientation of the column foot relative to the displacement adjustment platform, adjusting the horizontal orientation of the column foot, so that the horizontal orientation of the column foot is consistent with the horizontal orientation of the target installation position of the column foot;

[0039] S403, by adjusting the support height of each three-way displacement jack mechanism, adjusting the vertical attitude of the column foot, when the horizontal transverse x coordinate difference between each measuring point on the column foot fixing sleeve and its respective measuring point target position, the horizontal longitudinal y coordinate difference between each measuring point and its respective measuring point target position, and the vertical z coordinate difference between each measuring point and its respective measuring point target position are all equal, then it is indicated that the adjustment is in place;

[0040] S404, by adjusting each three-way displacement jack mechanism, the column foot as a whole performs translational displacement, when the horizontal transverse x coordinate difference, the horizontal longitudinal y coordinate difference and the vertical z coordinate difference between each measuring point on the column foot fixing sleeve and its respective measuring point target position are all 0, then it is indicated that the column foot has been adjusted to the target position, and the adjustment of the three-dimensional attitude of the column foot is completed.

[0041] Compared with the prior art, the present application has the following beneficial effects:

[0042] 1. The large-span arch bridge arch column foot three-dimensional attitude adjustment system provided by the present application has fewer components, simple structure, low installation precision requirement, and is convenient for on-site assembly and construction, so that it can be conveniently built and applied in the column foot attitude adjustment construction of the arch column.

[0043] 2. With the large-span arch bridge arch column foot three-dimensional attitude adjustment system, the column foot can be connected for translational and rotational adjustment in each direction, so that the arch column foot can quickly and accurately reach the target attitude and position, improve the installation and construction efficiency of the large-span arch bridge arch column foot, and help save labor and safety management cost.

[0044] 3. The large-span arch bridge arch column foot three-dimensional attitude adjustment method of the present application can quickly and accurately make the arch column foot reach the target attitude, meet the adjustment precision of the bolted arch column bolted column foot, and clearly show the specific adjustment method steps. BRIEF DESCRIPTION OF DRAWINGS

[0045] In order to make the purpose, technical scheme and advantages of the application clearer, the application will be further described in detail below with reference to the drawings, in which:

[0046] Figure 1 It is a front view schematic diagram of the installation state of the large-span arch bridge arch column foot three-dimensional attitude adjustment system of the present application.

[0047] Figure 2 Figure 9 is a side view of the installation state of the three-dimensional posture adjustment system of the column foot of the long-span arch bridge.

[0048] Figure 3 Figure 10 is a bottom view of the arrangement position of the three-dimensional displacement jack mechanism on the displacement adjustment platform.

[0049] Figure 4 Figure 11 is a front view of the installation state among the support platform, the three-dimensional displacement jack mechanism, and the displacement adjustment platform.

[0050] Figure 5 Figure 12 is a side view of the installation state among the support platform, the three-dimensional displacement jack mechanism, and the displacement adjustment platform.

[0051] Figure 6 Figure 13 is a top view of the displacement adjustment platform in the three-dimensional posture adjustment system of the column foot of the long-span arch bridge.

[0052] Figure 7 Figure 14 is a side view of the column foot fixing sleeve in the three-dimensional posture adjustment system of the column foot of the long-span arch bridge.

[0053] Figure 8 Figure 15 is a top view of the column foot fixing sleeve in the three-dimensional posture adjustment system of the column foot of the long-span arch bridge.

[0054] Figure 9 Figure 16 is a schematic view of the state of the column foot to be assembled and the column foot fixing sleeve connected.

[0055] Figure 10 Figure 17 is an example diagram of the selection of measuring points on the column foot to be assembled.

[0056] Reference signs:

[0057] Support platform 1, three-dimensional displacement jack mechanism 2, displacement adjustment platform 3, column foot fixing sleeve 4.

[0058] Vertical jack 21, horizontal jack 22, longitudinal jack 23, longitudinal sliding table 24, horizontal sliding table 25, longitudinal sliding rail 26, horizontal sliding rail 27.

[0059] Through hole 31, circular ring rail groove 32, level 33.

[0060] Column foot fixing sleeve 41, connecting hole group 42, pulley foot 43. DETAILED DESCRIPTION

[0061] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0062] The terms "first", "second", and similar terms used in the patent application and claims of the present application do not denote any order, quantity, or importance, but are used to distinguish different components. Similarly, the singular forms "a", "an", and "the" or similar terms do not denote a quantity limitation, but mean that at least one exists. The terms "include" or "contain" or similar terms mean that the components or objects appearing before "include" or "contain" cover the features, whole, steps, operations, elements, and / or components listed after "include" or "contain", and do not exclude the existence or addition of one or more other features, whole, steps, operations, elements, components, and / or their combinations. "Up", "down", "left", "right", and the like are only used to represent relative positional relationships, which may change accordingly when the absolute position of the described object changes.

[0063] The present application provides a three-dimensional posture adjustment system for a column foot on a column on a large-span arch bridge, as shown in Figure 1 and Figure 2 , which comprises a support platform 1, a three-way displacement jack mechanism 2, a displacement adjustment platform 3, and a column foot fixing kit 4. The support platform 1 is fixedly connected to the main arch rib of the large-span arch bridge and provides structural support for the displacement adjustment platform 3 and the column foot fixing kit 4. The displacement adjustment platform 3 is installed above the support platform 1 by the three-way displacement jack mechanism 2, so that the displacement adjustment platform 3 can have three-way displacement in the horizontal transverse, horizontal longitudinal, and vertical directions relative to the support platform 1, and the middle of the displacement adjustment platform 3 is provided with a through hole for the column foot of the column to pass through. The column foot fixing kit 4 is installed on the displacement adjustment platform 3 by a rotating connection structure and is located directly above the through hole, and the rotating axis of the column foot fixing kit 4 is vertically arranged and coincides with the central axis of the through hole, so that the column foot fixing kit 4 can be fixedly connected with the column foot passing through the through hole.

[0064] With the three-dimensional posture adjustment system for the column foot of the arch column of the long-span arch bridge provided by the application, the column foot three-dimensional posture adjustment system can be installed on the main arch rib of the long-span arch bridge during the construction of the arch column of the long-span arch bridge, and the system can be connected to the column foot for adjustment in each direction after the connection, so that the column foot of the arch column can reach the target posture and position more quickly and accurately, thereby better meeting the requirements of accurate and rapid installation of the column foot of the arch column of the long-span arch bridge, improving the installation and construction efficiency of the column foot of the arch column of the long-span arch bridge, ensuring the construction quality, saving labor and safety management costs, and reducing the safety risk of construction operation.

[0065] In specific implementation, the support platform 1 can adopt a plate-shaped installation platform or a support structure installation base, which provides structural support for the displacement adjustment platform 3 and the column foot fixing sleeve 4. The length L1 and the width B1 of the support platform 1 are comprehensively considered according to the installation and connection position of the support platform 1 on the main arch rib, the transverse length and width dimensions of the column foot to be assembled, the transverse adjustment space of the displacement adjustment platform 3 above, and the layout position design of the three-way displacement jack mechanism 2. If the support platform 1 adopts a plate-shaped structure material, it is better to adopt a hard metal material such as steel with good support strength, and the thickness H1 is determined according to the total weight of the column foot to be installed and the support system, and is recommended to be not less than 10 cm.

[0066] Specifically, in the three-dimensional posture adjustment system for the column foot of the arch column of the long-span arch bridge, the displacement adjustment platform 3 can be designed to be installed above the support platform 1 by four three-way displacement jack mechanisms 2, and the four three-way displacement jack mechanisms 2 support the four corners of the displacement adjustment platform 3, respectively. For example, the four three-way displacement jack mechanisms 2 arranged on the support platform 1 can be arranged at the No. 1, No. 2, No. 3 and No. 4 positions of the support platform 1. Figure 3 At the same time, considering the support stability of the three-way displacement jack mechanism 2 to the displacement adjustment platform 3 and the transverse adjustment space required above the displacement adjustment platform 3, the layout position of the three-way displacement jack mechanism is preferably not less than 10 cm from the edge of the support platform 1. For example, as shown in the figure, if the length direction spacing of the four three-way displacement jack mechanisms 2 is L2 and the width direction spacing is B2, the relationship between the length L1 and the width B1 of the support platform 1 is preferably L1-L2≥10 cm and B1-B2≥10 cm. Figure 3

[0067] For the structure design of each three-way displacement jack mechanism 2, as shown in the figures, the three-way displacement jack mechanism 2 can be designed to include a base plate 21, a first displacement adjusting mechanism 22, a second displacement adjusting mechanism 23 and a third displacement adjusting mechanism 24. Figure 4 Figure 5 ​​As shown, each three-way displacement jack mechanism 2 comprises a vertical jack 21, a horizontal transverse jack 22 and a horizontal longitudinal jack 23. Among them, the base of the horizontal longitudinal jack 23 is fixed on the support cap 1, the jacking end of the horizontal longitudinal jack 23 is arranged horizontally and longitudinally and is connected with a horizontal longitudinal sliding table 24 on the support cap 1, the horizontal longitudinal sliding table 24 can reciprocate along the horizontal longitudinal direction under the driving of the jacking end of the horizontal longitudinal jack 23; the base of the horizontal transverse jack 22 is fixed on the horizontal longitudinal sliding table 24, the jacking end of the horizontal transverse jack 22 is arranged horizontally and transversely and is connected with a horizontal transverse sliding table 25 on the horizontal longitudinal sliding table 24, the horizontal transverse sliding table 25 can reciprocate along the horizontal transverse direction under the driving of the jacking end of the horizontal transverse jack 22; the base of the vertical jack 21 is fixed on the horizontal transverse sliding table 25, the jacking end of the vertical jack 21 is arranged vertically and is connected with the displacement adjustment platform 3, so that the displacement adjustment platform 3 can ascend and descend along the vertical direction under the driving of the jacking end of the vertical jack 21. In specific implementation, in order to better ensure the smooth sliding of the horizontal longitudinal sliding table 24 on the support cap 1, a horizontal longitudinal sliding rail 26 can be arranged on the support cap 1, so that the horizontal longitudinal sliding table 24 reciprocates on the horizontal longitudinal sliding rail 26 to reduce the sliding friction; similarly, a horizontal transverse sliding rail 27 can also be arranged on the horizontal longitudinal sliding table 24, so that the horizontal transverse sliding table 25 reciprocates on the horizontal transverse sliding rail 27 to reduce the sliding friction, so as to better ensure the smooth sliding of the horizontal transverse sliding table 25 on the horizontal longitudinal sliding table 24.

[0068] In this way, through the three-way displacement jack mechanism design scheme, the vertical, horizontal transverse and horizontal longitudinal directions of the displacement adjustment platform 3 and the column foot fixing sleeve 4 supported thereon can be adjusted through the vertical jack 21, the horizontal transverse jack 22 and the horizontal longitudinal jack 23, so as to drive the flexible adjustment of the three-way installation position of the column foot, and the adjustment precision of the three-dimensional position of the column foot can be well ensured, the operation is simple and convenient for construction.

[0069] The displacement adjustment platform 3 is installed on the three-way displacement jack mechanism 2 and is used for supporting the column foot fixing sleeve 4. In specific implementation, as shown in Figure 6As shown, the displacement adjustment platform 3 can be made of a steel plate structure as a whole, and the overall shape can be designed as a rectangular plate. The thickness is determined according to the total weight of the column foot and the column foot fixing kit 4. It is recommended that the thickness H2 of the displacement adjustment platform 3 is not less than 10 cm. The length L4 and the width B4 of the displacement adjustment platform 3 are determined according to the support requirements of the column foot fixing kit 4. Because the column foot needs to pass through the displacement adjustment platform 3 to be welded with the main arch rib downward during the process of adjusting and installing the column foot connected to the column foot fixing kit 4, a through hole 31 for the column foot to pass through is designed in the middle of the displacement adjustment platform 3. The shape and size of the through hole 31 are preferably larger than the cross-sectional size of the column foot, so as to leave enough space for the rotation and horizontal position adjustment of the column foot during the construction process. The cross section of the column foot is usually rectangular, so the through hole 31 in the middle of the displacement adjustment platform 3 can also be designed as a whole rectangular shape. The length L4 and the width B4 of the through hole 31 are preferably 10-20 cm larger than the length and width of the cross section of the column foot, so that there is an adjustment gap space of 5-10 cm between the edge of the through hole 31 and the column foot passing through. For example, assuming that the length and width of the column foot are l and b respectively, the length L4 and the width B4 of the through hole 31 are L4=B4=max(l,b)+5-10 cm.

[0070] In addition, in specific implementation, in order to more conveniently adjust and observe the vertical state of the column foot, as shown in Figure 6 Two levels 33 can be designed and installed on the upper surface of the displacement adjustment platform 3, and the arrangement directions of the two levels 33 are perpendicular to each other along the upper surface of the displacement adjustment platform 3, for example, the two levels 33 are arranged at the opposite diagonal positions of the upper surface of the displacement adjustment platform 3 and are parallel to the length and width directions respectively. At the same time, the plane where the upper surface of the displacement adjustment platform 3 is designed to be perpendicular to the central axis of the through hole. In this way, by adjusting and observing the horizontal position of the upper surface of the displacement adjustment platform 3, the vertical state of the column foot connected to the column foot fixing kit 4 (the column foot passes through the through hole and the central axis coincides with the central axis of the through hole) can be adjusted and observed, and the construction operation is more convenient and fast.

[0071] In specific implementation, as shown in Figure 7 and Figure 8As shown, the structural design of the column foot fixing kit 4 includes a column foot fixing sleeve 41 with a rectangular cross section, and the cross-sectional rectangular size of the column foot fixing sleeve 41 matches the cross-sectional rectangular size of the column foot, for example, the cross-sectional rectangular length L5 and width B5 size of the column foot fixing sleeve 41 can be slightly larger than the cross-sectional rectangular length and width size of the column foot by 3-5 cm, so that the column foot can be inserted into the column foot fixing sleeve. The column foot fixing sleeve 41 is preferably also made of steel, and the sleeve side wall thickness D1, D2 is preferably 2-5 cm, and the height H3 of the column foot fixing sleeve 41 is preferably 40-60 cm. The cross-sectional rectangular length and width size of the column foot fixing sleeve 41, the sleeve side wall thickness, and the sleeve height can be determined according to the size and weight of the column foot to be assembled in actual construction, and sufficient support force can be provided. The side wall of the column foot fixing sleeve 41 is also provided with a connecting hole group 42, and the arrangement position of the connecting hole group 42 can correspond to the bolt hole group position on the top side of the column foot, which is to use a bolt rod to pass through the connecting hole group 42 and connect to the bolt hole group on the top side of the column foot to be assembled during construction. In the construction process, the bolt rod (for example, a fixed steel rod) is used to pass through the connecting hole group 42 and connect to the bolt hole group on the top side of the column foot to be assembled to fix the column foot fixing sleeve 41 and the column foot after connection. The state is as shown in Figure 9

[0072] In addition, as Figure 7 ​As shown, a plurality of groups of downwardly extending pulley supports 43 are also arranged on the bottom periphery of the column foot fixing kit 4, and the lower ends of the pulley supports 43 are provided with rotatable pulleys. The structure of the pulley supports 43 is designed to enable the column foot fixing kit 4 to rotate on the displacement adjustment platform 3 as a vertical shaft, so as to realize adjustment of the horizontal orientation of the column foot. Correspondingly, in the design of the rotating connection structure between the column foot fixing kit 4 and the displacement adjustment platform 3, a circular ring-shaped rail groove 32 can also be arranged on the upper surface of the displacement adjustment platform 3 at a position on the outer periphery of the through hole 31, and the center of the circular ring-shaped rail groove 32 coincides with the central axis of the through hole 31; the column foot fixing kit 4 can be embedded in the circular ring-shaped rail groove 32 on the upper surface of the displacement adjustment platform 3 through the groups of pulley supports 43 distributed on the bottom periphery of the column foot fixing sleeve 41, so as to enable the column foot fixing kit 4 to rotate as a vertical rotating shaft coinciding with the central axis of the through hole 31. In this way, through the cooperation of the pulley supports 43 and the circular ring-shaped rail groove 32, the column foot fixing kit 4 can rotate on the displacement adjustment platform 3 as a vertical shaft, and since the center of the circular ring-shaped rail groove 32 coincides with the central axis of the through hole 31, the vertical rotating shaft of the column foot fixing kit 4 during rotation can keep consistent with the central axis of the through hole 31, so as to more conveniently ensure that the vertical shaft of the column foot does not deviate during rotation adjustment of the horizontal orientation of the column foot. In the specific design, the pulley supports 43 distributed on the bottom periphery of the column foot fixing kit 4 are preferably uniformly distributed, for example, one group of pulley supports 43 is arranged at each of the four corners of the bottom of the column foot fixing kit 4, so as to enable the stress to be uniformly distributed; the pulley supports 43 can adopt a steel triangular support or the like structure to provide better support force. The pulleys at the bottom of the pulley supports 43 can adopt a steel universal ball wheel or the like structure, on the one hand, the rotating direction of the universal ball wheel structure is flexible, which is convenient for reducing the constraint on the installation orientation during installation; on the other hand, the structure of the central wheel seat of the universal ball wheel also has high structural support force, which is better in terms of construction load bearing capacity and durability. The inner diameter R1 and the width r1 of the circular ring-shaped rail groove 32 are determined according to the distribution size of the pulley supports 43 on the bottom periphery of the column foot fixing kit 4 and the size of the pulleys.

[0073] It can be seen that the large-span arch bridge arch column foot three-dimensional posture adjustment system provided by the present application has fewer components, simple structure, low installation precision requirement, and is convenient for on-site assembly and construction, so it can be conveniently built and applied in the posture adjustment construction of the arch column foot. Moreover, by means of the system, the column foot can be connected and adjusted in each direction, so that the arch column foot can quickly and accurately reach the target posture and position, improve the installation and construction efficiency of the large-span arch bridge arch column foot, and help save labor and safety management cost.

[0074] Next, the specific method of installing and constructing the column foot of the column on the arch of the long-span arch bridge using the three-dimensional posture adjustment system of the column on the arch of the long-span arch bridge is described. Specifically, it includes the following steps:

[0075] S1, mark the center coordinates of the target installation position of the column foot of the column on the arch of the long-span arch bridge on the main arch rib, and fixedly connect the support platform of the three-dimensional posture adjustment system of the column on the arch of the long-span arch bridge on the main arch rib, so that the adjustment range of the center coordinates and the transverse position of the three-dimensional posture adjustment system of the column on the arch of the long-span arch bridge after installation can cover the center coordinates and the transverse position of the target installation position of the column foot of the column on the arch.

[0076] In actual construction, the installation connection position of the support platform 1 on the main arch rib is determined according to the to-be-installed position of the column foot, and then the three-direction displacement jack mechanism 2, the displacement adjustment platform 3 and the column foot fixing sleeve 4 are installed in sequence. The installation process specifically includes:

[0077] S101, a support platform is welded on the main arch rib of the long-span arch bridge, and the support platform takes the center coordinates of the target installation position of the column foot of the column on the arch of the long-span arch bridge marked on the main arch rib as the center point, which is used as the support platform 1 of the three-dimensional posture adjustment system of the column on the arch of the long-span arch bridge;

[0078] S102, the three-direction displacement jack mechanism 2 is arranged on the support platform 1, and the bottom of the three-direction displacement jack mechanism 2 is welded and fixed with the support platform 1, and then the installation displacement adjustment platform 3 is placed on the three-direction displacement jack mechanism 2, so that the displacement adjustment platform 3 is installed above the support platform 1 through the three-direction displacement jack mechanism 2;

[0079] The displacement adjustment platform 3 is installed above the support platform 1 through four three-direction displacement jack mechanisms 2, and the four three-direction displacement jack mechanisms 2 form supports for the four corners of the displacement adjustment platform 3 respectively; and the adjustment range of the center coordinates and the transverse position of the displacement adjustment platform 3 adjusted by the three-direction displacement jack mechanism 2 can cover the center coordinates and the transverse position of the target installation position of the column foot of the column on the arch;

[0080] S103, the column foot fixing sleeve 4 is installed on the displacement adjustment platform 3 through the rotating connection structure and located at the position directly above the through hole 31, and the rotating axis of the column foot fixing sleeve 4 is vertically arranged and coincides with the central axis of the through hole 31; thereby, the construction of the three-dimensional posture adjustment system of the column on the arch of the long-span arch bridge is completed, and the adjustment range of the center coordinates and the transverse position of the three-dimensional posture adjustment system of the column on the arch of the long-span arch bridge can cover the center coordinates and the transverse position of the target installation position of the column foot of the column on the arch.

[0081] After the three-dimensional posture adjustment system of the column foot on the arch column of the long-span arch bridge is installed, the column foot is prepared to be connected and installed.

[0082] S2, the column foot to be assembled is lifted and passed through the through hole 31 in the middle of the displacement adjustment platform 3 in the three-dimensional posture adjustment system of the column foot on the arch column of the long-span arch bridge, and the column foot is fixedly connected with the column foot fixing sleeve 4, so that the central axis of the column foot coincides with the central axis of the through hole 31.

[0083] In the column foot fixing sleeve 4 designed in the application, the column foot fixing sleeve 41 with a rectangular cross section is arranged, and the size of the rectangular cross section of the column foot fixing sleeve 41 matches the size of the rectangular cross section of the column foot, so that the column foot can be inserted into the column foot fixing sleeve 41; a plurality of connecting holes 42 are arranged on the side wall of the column foot fixing sleeve 41, and the arrangement positions of the connecting holes 42 can correspond to the positions of the bolt holes on the top periphery of the column foot. When the column foot is fixedly connected with the column foot fixing sleeve 4, a plurality of bolt rods are inserted through the connecting holes 42 on the side wall of the column foot fixing sleeve 41 and are screwed into the bolt holes on the top periphery of the column foot, so that the column foot to be assembled is fixedly connected with the column foot fixing sleeve 4, as shown in the figure. The installation mode is convenient to operate, and the connection between the column foot and the column foot fixing sleeve 4 is stable and firm, which facilitates subsequent adjustment of the three-dimensional posture of the column foot. Figure 9

[0084] S3, the horizontal posture of the displacement adjustment platform 3 in the three-dimensional posture adjustment system of the column foot on the arch column of the long-span arch bridge is adjusted, so that the central axis of the column foot is adjusted to a vertical state.

[0085] On the displacement adjustment platform 3 designed in the application, two levels 33 are installed, and the arrangement directions of the two levels 33 are perpendicular to each other along the upper surface of the displacement adjustment platform 3, and the central axis of the through hole 31 of the displacement adjustment platform 3 is perpendicular to the plane in which the upper surface of the displacement adjustment platform 3 lies; therefore, when the horizontal posture of the displacement adjustment platform 3 is adjusted, the operation can be specifically as follows: the horizontal positions of the displacement adjustment platform 3 are adjusted by adjusting the support heights of the three-direction displacement jack mechanisms 2, so that when the two levels 33 on the upper surface of the displacement adjustment platform 3 are both in a horizontal state, it is indicated that the central axis of the column foot has been adjusted to a vertical state. When the initial adjustment is performed, the central axis of the column foot is kept in a vertical posture, which can balance the force applied to the displacement adjustment platform 3 by the column foot fixing sleeve 4 after the column foot is connected with the column foot fixing sleeve 4, and also facilitates subsequent establishment of three-dimensional coordinates of the column foot measuring point and calculation of the three-dimensional coordinate difference between the column foot measuring point and the target position.

[0086] ​S4, adjust the three-dimensional space position of the displacement adjustment platform 3 in the large-span arch bridge arch upstand column foot three-dimensional posture adjustment system, so that the three-dimensional space position of the column foot is adjusted to the arch upstand column foot target installation position marked on the main arch rib.

[0087] The column foot adjustment process of this step needs to go through vertical posture adjustment, horizontal orientation posture adjustment, and horizontal displacement adjustment, so that the three-dimensional space position of the column foot is adjusted to the target installation position. Specifically, the following steps are included:

[0088] S401, a plurality of measuring points are selected on the column foot in advance, and the three-dimensional coordinate difference between the current position of each measuring point and the target position of the measuring point is calculated based on the center coordinates and the transverse position of the column foot target installation position.

[0089] The number of measuring points selected on the column foot is at least 3, and preferably 4, to facilitate more accurate positioning. For example, the four corner positions at the upper end of the column foot can be selected as the four measuring points, such as the I, II, III, and IV positions shown in Figure 10 .

[0090] The technology of selecting measuring points on the construction object to establish a three-dimensional coordinate system and determine the spatial three-dimensional coordinates of the construction object is a common technology in the construction process. For example, a mirror or prism can be placed on the measuring point, and a binocular camera or a three-dimensional laser scanner can be used to determine the three-dimensional coordinates of the measuring point. This is a prior art and will not be described in detail. In the current column foot construction, the positioning of the three-dimensional coordinates of the measuring points is also used to determine the installation position of the column foot. However, the operation precision of the simple hoisting and manual positioning construction installation is difficult to meet the requirements.

[0091] S402, adjust the horizontal orientation posture of the column foot by adjusting the rotation of the column foot fixing kit 4 relative to the displacement adjustment platform 3, so that the horizontal orientation posture of the column foot is consistent with the horizontal orientation posture of the target installation position of the column foot.

[0092] This step first adjusts the horizontal orientation posture of the column foot to be consistent with the horizontal orientation posture of the target installation position of the column foot, which facilitates the adjustment of the horizontal transverse x, horizontal longitudinal y, and vertical z coordinate differences in the later adjustment. During the adjustment of the horizontal orientation posture of the column foot, the central axis of the column foot is temporarily kept vertical, which helps to balance the force and facilitate the rotation operation. However, the subsequent installation of the bridge deck, bridge deck pavement, and other structures will affect the column foot axis offset, so the column foot axis needs to be pre-offset during the installation of the column foot. Therefore, the axis of the target position of the column foot during installation is not necessarily vertical, and therefore the inclination of the central axis of the column foot needs to be adjusted to the target state in the subsequent steps.

[0093] S403, adjust the vertical posture of the column foot by adjusting the support height of each three-way displacement jack mechanism 2, and when the horizontal transverse x coordinate difference between each measuring point on the column foot fixing sleeve 4 and its respective measuring point target position, the horizontal longitudinal y coordinate difference between each measuring point and its respective measuring point target position, and the vertical z coordinate difference between each measuring point and its respective measuring point target position are all equal, it is indicated that the adjustment is complete.

[0094] This step adjusts the support height of each three-way displacement jack mechanism 2 to make the inclination angle of the column foot central axis reach the target state; when the horizontal transverse x coordinate difference between each measuring point on the column foot fixing sleeve 4 and its respective measuring point target position, the horizontal longitudinal y coordinate difference between each measuring point and its respective measuring point target position, and the vertical z coordinate difference between each measuring point and its respective measuring point target position are all equal, it is indicated that the inclination angle of the column foot central axis has reached the target state.

[0095] S404, adjust the three-way displacement jack mechanism 2 to make the column foot as a whole perform a horizontal displacement; when the horizontal transverse x coordinate difference, the horizontal longitudinal y coordinate difference, and the vertical z coordinate difference between each measuring point on the column foot fixing sleeve 4 and its respective measuring point target position are all 0, it is indicated that the column foot has been adjusted to the target position, and the adjustment of the three-dimensional posture of the column foot is completed.

[0096] In this way, the adjustment of the three-dimensional spatial position of the column foot is programmed and standardized, the column foot posture adjustment operation link is clearer, and the accuracy of the adjustment of the three-dimensional spatial position of the column foot is better guaranteed, and problems such as repeated adjustment, low construction efficiency, and poor adjustment accuracy caused by unclear operation steps and accidentalness in the column foot adjustment construction process are avoided.

[0097] S5, weld the column foot and the main arch rib, and after the welding construction is completed, remove the three-dimensional posture adjustment system of the column foot of the arch column of the long-span arch bridge.

[0098] The removal process of the three-dimensional posture adjustment system of the column foot of the arch column of the long-span arch bridge is the reverse process of the installation, the bolt rod between the column foot and the column foot fixing sleeve 4 can be removed first, the column foot fixing sleeve 4 and the displacement adjustment platform 3 sleeved on the outer periphery of the column foot are taken out upward in sequence, then the three-way displacement jack mechanism 2 is removed, and finally the support platform 1 is removed from the main arch rib.

[0099] It can be seen that the present application provides a large-span arch bridge arch upstand column foot three-dimensional posture adjustment system and adjustment method, which adjusts the bolted foot through the self-designed arch upstand column foot three-dimensional posture adjustment system. The system can adjust the translation and rotation in each direction respectively, so that the adjustment process is more refined and efficient. Through the adjustment of the system, the arch upstand column foot can quickly and accurately reach the target posture, and the adjustment accuracy of the bolted arch upstand column bolted foot is met. The present application proposes an accurate adjustment method based on the system, and clearly shows the specific adjustment method steps. After completing the adjustment steps according to the requirements, the accurate control of the arch upstand column foot three-dimensional posture is completed, and repeated adjustment is avoided.

[0100] Embodiment

[0101] The present application is further described through an embodiment.

[0102] The specific steps of the present application are demonstrated by taking the arch upstand column foot of a certain bridge as an example. It should be noted that the various size parameters in this embodiment are the design values of the construction, and the tolerances are not taken into account. In actual construction application, manufacturing and installation tolerances within a reasonable range are allowed. The following will be described in detail.

[0103] The height of the arch upstand column foot to be installed is 2.5 m, the width in the transverse direction of the bridge is 1.95 m, the length in the longitudinal direction of the bridge is 1.95 m, the wall thickness is 2 cm, the bolt hole diameter is 28 mm, and the hole depth is 20 mm.

[0104] Step (1): The center coordinates of the column foot are laid out on the main arch rib, and the large-span arch bridge arch upstand column foot three-dimensional posture adjustment system is installed. The mileage and transverse position of the center coordinates of the system need to be the same as those of the center coordinates of the column foot. The system is composed of a support platform 1, a four-group three-way displacement jack mechanism 2, an intermediate rotary displacement adjustment platform 3, and a column foot fixing kit 4. The dimensions of the large-span arch bridge arch upstand column foot three-dimensional posture adjustment system are L1=B1=3.014 m, H1=10 cm, L2=B2=2.914 m, H2=10 cm, L3=B3=4.6 m, L4=B4=2 m, R1=2.1 m, r1=2 cm, L5=B5=2.814 m, D1=D2=2 cm, and H3=50 cm.

[0105] 1.1) The bottom support platform 1 is placed on the lowermost part of the three-dimensional posture adjustment system of the arch column foot of the long-span arch bridge, and is connected to the main arch rib by welding. The length L1=3.014 m and the width B1=3.014 m of the support platform 1 are comprehensively considered according to the arrangement of the four groups of three-way displacement jack mechanisms. The three-way displacement jack mechanism arrangement position is not less than 10 cm from the edge of the platform, that is, L1-L2=3.014 m-2.914 m≥10 cm; B1-B2=3.014 m-2.914 m≥10 cm. The thickness H1=10 cm of the support platform 1 is determined according to the total weight of the to-be-installed column foot and the support system, and is recommended to be not less than 10 cm.

[0106] 1.2) The three-way displacement jack mechanism 2 is used to adjust the position and angle of the intermediate rotary displacement adjustment platform 3. The three-way displacement jack mechanism 2 is composed of vertical jacks 21, horizontal jacks 22, longitudinal jacks 23 and their supporting counterforce frames. The bottom of the jacks and the supporting counterforce frames is welded to the bottom support platform, and the intermediate rotary displacement adjustment platform 3 is placed above the three-way displacement jack mechanism 2. The distance length L2=2.914 m of the three-way displacement jack mechanism 2 group and the length L5=2.814 m of the column foot fixing sleeve 4 satisfy the relationship L2-L5=2.914 m-2.814 m=10 cm, and the distance width B2=2.914 m of the three-way displacement jack mechanism 2 group and the width B5=2.814 m of the column foot fixing sleeve 4 satisfy the relationship B2-B5=2.914 m-2.814 m=10 cm. 22

[0107] 1.3) The intermediate rotary displacement adjustment platform 3 is placed on the four groups of three-way displacement jack mechanisms 2, and is used to support the column foot fixing sleeve 4. The intermediate rotary displacement adjustment platform 3 includes a displacement adjustment platform 3, two sets of horizontal rulers 33, a platform self-provided circular ring groove 32, a through hole 31, etc.

[0108] Two sets of high-precision horizontal rulers 33 are magnetically fixed to the upper surface of the displacement adjustment platform 3, and the two sets of horizontal rulers 33 are perpendicular to each other and arranged at opposite corners of the platform. The through hole 31 serves as a channel for placing the column foot to the main arch rib. The length and width of the through hole 31 are related to the size of the column foot. Assuming that the length and width of the column foot are l and b respectively, then the length L4 and the width B4 of the through hole 31 are L4=B4=max(l,b)+5 cm=1.95 m+5 cm=2 m. The inner diameter of the platform circular ring groove 32 is R1=2.1 m, and the width of the platform circular ring groove 32 is r1=2 cm, so the outer diameter of the platform circular ring groove 32 is R1+r1, and the concave depth is 2 cm. The length L3 and the width B3 of the displacement adjustment platform 3 are related to the length L5 and the width B5 of the column foot fixing sleeve 41, and the specific size is L3=B3=2R1+40 cm=4.6 m.

[0109] ​1.4) Column foot fixing kit 4 is supported on the intermediate rotary displacement adjustment platform 3 by the rotating guide wheel, and the lower part of the kit has a bolt group with the same distance as the bolted column foot. The length L5 and width B5 of the column foot fixing sleeve 41 are = 2.814 m, the height H3 of the column foot fixing sleeve 41 is 50 cm, and the thickness D1 = D2 of the side wall of the column foot fixing sleeve 41 is 2 cm. The center length direction distance of the rotating guide wheel is L5 = 2.814 m, the center width direction distance of the rotating guide wheel is B = 2.814 m, and the wheel diameter and wheel width of the rotating guide wheel are both r1 = 2 cm and H3 = 50 cm.

[0110] Step (2): Arranging column foot measuring points, screwing the fixed steel rod through the bolt holes of the column foot fixing kit 4 and the top surface of the column foot, so that the to-be-installed column foot is connected with the column foot three-dimensional posture adjustment system on the arch column of the long-span arch bridge. The fixed steel rod is a bolt rod that fits the bolt holes of the column foot and the adjustment system, and the length is not less than 40 cm.

[0111] The column foot measuring points are arranged at the four corner points of the column foot top surface, as shown in Figure 10 , the fixed steel rods are arranged in the longitudinal or transverse direction, and for safety, two rows are arranged, with two rods at the edge of each row. The arrangement should take into account the height of the column foot, so that during the column foot posture adjustment process, the column foot is in a suspended state and does not interfere with the position of the main arch rib. At this time, the connection state of the column foot is as shown in Figure 9 .

[0112] Step 3: Adjusting through the three-way displacement jack mechanism 2 to make the two sets of levels 33 of the intermediate rotary displacement adjustment platform 3 in a horizontal state. This is to try to keep the column foot center axis in a vertical posture, on the one hand to make the column foot fixing kit 4 connected to the column foot exert a more balanced force on the displacement adjustment platform 3, and on the other hand, it is also more convenient for subsequent establishment of the three-dimensional coordinates of the column foot measuring points and calculation of the three-dimensional coordinate difference between them and the target position.

[0113] Step 4: First measure the three-way coordinates of the column foot measuring points, all in meters. Let the theoretical coordinates of No. 1 measuring point be , the theoretical coordinates of No. 2 measuring point be , the theoretical coordinates of No. 3 measuring point be , and the theoretical coordinates of No. 4 measuring point be . At this time, after the column foot is fixed by the steel rod, the first three-way coordinate measurement of the column foot measuring points is carried out. Let the first actual measurement coordinates of No. 1 measuring point be , the first actual measurement coordinates of No. 2 measuring point be , the first actual measurement coordinates of No. 3 measuring point be , and the first actual measurement coordinates of No. 4 measuring point be .

[0114] It can be seen that the actual measurement of the column foot connection axis is not an absolute value state, which may be caused by certain engineering errors in the connection process, but within the acceptable tolerance range, it can be overcome through subsequent attitude adjustment.

[0115] Step 5: Column foot attitude rotation adjustment. By pushing the fixed steel rod, the column foot fixing kit 4 drives the column foot to rotate around the platform's built-in circular track 32. During the process, the three-dimensional coordinates of the four measuring points of the column foot are measured. After rotation, the second column foot coordinate measurement is performed. The second measured coordinates of No. 1 measuring point are , the second measured coordinates of No. 2 measuring point are , the second measured coordinates of No. 3 measuring point are , and the second measured coordinates of No. 4 measuring point are When the following formula is satisfied:

[0116]

[0117]

[0118]

[0119]

[0120] When the above conditions are met, it indicates that the horizontal orientation attitude of the column foot is consistent with the horizontal orientation attitude of the target installation position of the column foot, and the column foot attitude rotation adjustment is in place.

[0121] Step 6: Adjust the relative height difference of the column foot through the vertical jack 21 of the three-dimensional displacement jack mechanism 2. Calculate the theoretical height difference of No. 1 measuring point with No. 2 measuring point, No. 3 measuring point, and No. 4 measuring point. That is

[0122]

[0123]

[0124]

[0125] And the second time, the measured height difference of No. 1 measuring point with No. 2 measuring point, No. 3 measuring point, and No. 4 measuring point is:

[0126]

[0127]

[0128]

[0129] After adjusting the vertical jack 21 of the three-way displacement jack mechanism 2, the third time measurement of the coordinates of the measuring points is carried out. The third time measured coordinates of the No. 1 measuring point are , the third time measured coordinates of the No. 2 measuring point are , the third time measured coordinates of the No. 3 measuring point are , and the third time measured coordinates of the No. 4 measuring point are . The third time measured coordinates satisfy the following formula:

[0130]

[0131]

[0132]

[0133] At this time, the relative height difference adjustment of the column foot is completed, indicating that the inclination angle of the central axis of the column foot has been adjusted to the target state.

[0134] Step 7: The column foot is adjusted in a whole translation by the four three-way displacement jack mechanisms 2. The difference between the third time measured coordinates of the No. 1 point and the theoretical value is:

[0135]

[0136] The difference between the third time measured coordinates of the No. 2 point and the theoretical value is:

[0137]

[0138] The difference between the third time measured coordinates of the No. 3 point and the theoretical value is:

[0139]

[0140] The difference between the third time measured coordinates of the No. 4 point and the theoretical value is:

[0141]

[0142] At this time, it is known that:

[0143]

[0144] Therefore, the column foot is adjusted in a whole translation by the four three-way displacement jack mechanisms 2. After adjusting the vertical jack 21 of the three-way displacement jack mechanism 2, the fourth time measurement of the coordinates of the measuring points is carried out. The fourth time measured coordinates of the No. 1 measuring point are , the fourth time measured coordinates of the No. 2 measuring point are , the fourth time measured coordinates of the No. 3 measuring point are , and the third time measured coordinates of the No. 4 measuring point are . The fourth time measured coordinates satisfy the following formula:​

[0145]

[0146]

[0147]

[0148]

[0149] At this time, the column foot three-dimensional posture adjustment is completed, indicating that the column foot has been adjusted to the target position.

[0150] Step 8: Perform column foot and main arch rib welding work, and remove the large-span arch bridge arch column foot three-dimensional posture adjustment system after welding.

[0151] In summary, the present application has the following technical advantages:

[0152] 1. The large-span arch bridge arch column foot three-dimensional posture adjustment system provided by the present application has fewer components, simple structure, low installation precision requirement, and is convenient for on-site assembly and construction, so it can be conveniently built and applied in the column foot posture adjustment construction of the arch column.

[0153] 2. With the large-span arch bridge arch column foot three-dimensional posture adjustment system, the column foot can be connected and adjusted in each direction, so that the arch column foot can quickly and accurately reach the target posture and position, improving the installation and construction efficiency of the large-span arch bridge arch column foot, and helping to save labor and safety management costs.

[0154] 3. The large-span arch bridge arch column foot three-dimensional posture adjustment method of the present application can quickly and accurately make the arch column foot reach the target posture, meet the adjustment precision of the bolted arch column bolted column foot, and clearly show the specific adjustment method steps.

[0155] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application and not to limit the technical solutions. Those skilled in the art should understand that modifications or equivalent replacements to the technical solutions of the present application without departing from the spirit and scope of the present application should be covered in the scope of the claims of the present application.

Claims

1. A three-dimensional posture adjustment system for a large-span arch bridge arch column column base, characterized in that, The support platform is used for fixed connection with the main arch rib of the large-span arch bridge, and provides structural support for the displacement adjustment platform and the column foot fixing kit. The support platform is used for fixed connection with the main arch rib of the large-span arch bridge, and provides structural support for the displacement adjustment platform and the column foot fixing kit. The column foot fixing kit is installed on the displacement adjustment platform through a rotating connection structure and is located directly above the through hole, and the rotating axis of the column foot fixing kit is vertically arranged and coincides with the central axis of the through hole, so that the column foot fixing kit can be fixedly connected with the column foot passing through the through hole. The column foot fixing kit includes a column foot fixing sleeve with a rectangular cross section, and the cross-sectional rectangular size of the column foot fixing sleeve matches the cross-sectional rectangular size of the column foot of the stand column, so that the column foot of the stand column can be inserted into the column foot fixing sleeve.

2. The three-dimensional attitude adjustment system for the column foot of the upright column on the arch of the long-span arch bridge according to claim 1, characterized in that, The rotating connection structure between the column foot fixing kit and the displacement adjustment platform includes a circular ring-shaped track groove provided on the upper surface of the displacement adjustment platform at a position outside the periphery of the through hole, and the center of the circular ring-shaped track groove coincides with the central axis of the through hole. The displacement adjustment platform is installed above the support platform through four three-way displacement jack mechanisms, and the four three-way displacement jack mechanisms support the four corners of the displacement adjustment platform, respectively. Each three-way displacement jack mechanism includes a vertical jack, a horizontal jack and a longitudinal jack. The base of the longitudinal jack is fixed on the support platform, the top pushing end of the longitudinal jack is horizontally and longitudinally arranged and is connected with a longitudinal sliding table on the support platform, and the longitudinal sliding table can reciprocate along the horizontal and longitudinal direction under the driving of the top pushing end of the longitudinal jack. The base of the horizontal jack is fixed on the longitudinal sliding table, the top pushing end of the horizontal jack is horizontally and transversely arranged and is connected with a horizontal sliding table on the longitudinal sliding table, and the horizontal sliding table can reciprocate along the horizontal and transverse direction under the driving of the top pushing end of the horizontal jack. The base of the vertical jack is fixed on the horizontal sliding table, the top pushing end of the vertical jack is vertically arranged and is connected with the displacement adjustment platform, so that the displacement adjustment platform can be lifted along the vertical direction under the driving of the top pushing end of the vertical jack.

3. The three-dimensional attitude adjustment system for the column foot of the upright column on the arch of the long-span arch bridge according to claim 1, characterized in that, The upper surface of the displacement adjustment platform is also provided with two levels, and the arrangement directions of the two levels are perpendicular to each other along the upper surface of the displacement adjustment platform; and the plane where the upper surface of the displacement adjustment platform is located is perpendicular to the central axis of the through hole.

4. A three-dimensional posture adjustment construction method for a large-span arch bridge arch column foot, characterized in that, The method comprises the following steps: S1, marking the center coordinates of the target installation position of the column foot on the main arch rib of the long-span arch bridge, and fixing the support platform of the long-span arch bridge column foot three-dimensional posture adjustment system of claim 1 on the main arch rib, so that the adjustment range of the center coordinates and the transverse position of the long-span arch bridge column foot three-dimensional posture adjustment system after installation can cover the center coordinates and the transverse position of the target installation position of the column foot; S2, hoisting the column foot to be assembled and making it pass through the through hole in the middle of the displacement adjustment platform in the long-span arch bridge column foot three-dimensional posture adjustment system, and fixing the column foot and the column foot fixing sleeve, so that the central axis of the column foot coincides with the central axis of the through hole; S3, adjusting the horizontal posture of the displacement adjustment platform in the long-span arch bridge column foot three-dimensional posture adjustment system, so that the central axis of the column foot is adjusted to a vertical state; S4, adjusting the three-dimensional spatial position of the displacement adjustment platform in the long-span arch bridge column foot three-dimensional posture adjustment system, so that the three-dimensional spatial position of the column foot is adjusted to the target installation position of the column foot marked on the main arch rib; S5, welding the column foot and the main arch rib, and after the welding construction is completed, the long-span arch bridge column foot three-dimensional posture adjustment system is removed.

5. The method according to claim 4, wherein the method is characterized by, In the S1, the process of installing the long-span arch bridge column foot three-dimensional posture adjustment system specifically comprises: S101, welding a support platform on the main arch rib of the long-span arch bridge, and taking the center coordinates of the target installation position of the column foot marked on the main arch rib of the long-span arch bridge as the center point, so as to serve as the support platform of the long-span arch bridge column foot three-dimensional posture adjustment system; S102, arranging a three-way displacement jack mechanism on the support platform, and welding and fixing the bottom of the three-way displacement jack mechanism with the support platform, and then placing the displacement adjustment platform on the three-way displacement jack mechanism, so that the displacement adjustment platform is installed above the support platform through the three-way displacement jack mechanism; The displacement adjustment platform is installed above the support platform through four three-way displacement jack mechanisms, and the four three-way displacement jack mechanisms form supports for the four corners of the displacement adjustment platform respectively; and the adjustment range of the center coordinates and the transverse position of the displacement adjustment platform adjusted by the three-way displacement jack mechanism can cover the center coordinates and the transverse position of the target installation position of the column foot. S103, the column foot fixing sleeve is installed on the displacement adjustment platform through the rotating connection structure and is located at a position directly above the through hole, and the rotating axis of the column foot fixing sleeve is vertically arranged and coincides with the central axis of the through hole; thus, the construction of the three-dimensional posture adjustment system of the column foot on the arch of the long-span arch bridge is completed, and the adjustment range of the central coordinates and the transverse positions of the three-dimensional posture adjustment system of the column foot on the arch of the long-span arch bridge can cover the central coordinates and the transverse positions of the target installation position of the column foot on the arch.

6. The method according to claim 4, wherein In S2, the specific way of fixing and connecting the column foot and the column foot fixing sleeve is that a plurality of bolt rods are passed through the connecting hole groups on the side wall of the column foot fixing sleeve and are respectively screwed and fixed on the bolt hole groups on the top of the column foot, so that the column foot to be assembled and the column foot fixing sleeve are fixedly connected.

7. The method according to claim 4, wherein the method is characterized by, The upper surface of the displacement adjustment platform is also provided with two levels, and the arrangement directions of the two levels are perpendicular to each other along the upper surface of the displacement adjustment platform; the central axis of the through hole of the displacement adjustment platform is perpendicular to the plane of the upper surface of the displacement adjustment platform; S3 is specifically adjusting the horizontal position of the displacement adjustment platform by adjusting the support height of each three-way displacement jack mechanism, so that the two levels on the upper surface of the displacement adjustment platform are both in a horizontal state, indicating that the central axis of the column foot has been adjusted to a vertical state.

8. The method according to claim 4, wherein the method is characterized by, S4 specifically includes: S401, a plurality of measuring points are selected on the column foot in advance, and based on the central coordinates and the transverse positions of the target installation position of the column foot, the three-dimensional coordinate differences between the current positions of the measuring points and the target positions of the measuring points are calculated when the column foot is installed to the target position; S402, the horizontal orientation posture of the column foot is adjusted by adjusting the rotation of the column foot fixing sleeve relative to the displacement adjustment platform, so that the horizontal orientation posture of the column foot is consistent with the horizontal orientation posture of the target installation position of the column foot; S403, the vertical posture of the column foot is adjusted by adjusting the support height of each three-way displacement jack mechanism, so that the horizontal transverse x coordinate differences between the measuring points on the column foot fixing sleeve and the target positions of the measuring points are all equal, the horizontal longitudinal y coordinate differences between the measuring points and the target positions of the measuring points are all equal, and the vertical z coordinate differences between the measuring points and the target positions of the measuring points are all equal, indicating that the adjustment is completed; S404, the column foot is translated by adjusting each three-way displacement jack mechanism, so that the horizontal transverse x coordinate differences, the horizontal longitudinal y coordinate differences and the vertical z coordinate differences between the measuring points on the column foot fixing sleeve and the target positions of the measuring points are all 0, indicating that the column foot has been adjusted to the target position, and the adjustment of the three-dimensional posture of the column foot is completed.

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