Fine adjustment and closure device for arch rib without matched cutting section and construction method of fine adjustment and closure device

Abstract

The invention relates to the technical field of bridge construction, in particular to a matching-cutting-section-free arch rib fine adjustment closure device and a construction method thereof.The construction method comprises the following steps that firstly, before formal lifting is conducted, in order to verify the safety of a structure and a jack system in the lifting process, trial lifting is conducted; 2, in the trial lifting process, key parts of the in-situ assembled arch rib and the low-position assembled arch rib are detected; step 3, in the test lifting process, if all conditions are normal; according to the matching-cutting-section-free arch rib fine adjustment closure device and the construction method of the matching-cutting-section-free arch rib fine adjustment closure device, compared with a traditional construction method and an arch rib overall lifting method, the installation height of an arch rib assembling support is reduced, the site construction operation risk is reduced, in addition, the construction period is shortened, matching-cutting-section-free overall lifting closure is adopted, and compared with a traditional closure mode that a closure section of 2 m is arranged for closure, the construction efficiency is improved. The on-site hoisting and welding workload is reduced, and the construction cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, in particular to a non-matching segment arch rib fine-tuning joint device and a construction method thereof. Background Art

[0002] As the volume and scale of bridge construction are getting larger and larger, some large-span bridges across rivers and streams emerge in an endless stream. At present, large-span bridges generally adopt suspension bridges, cable-stayed bridges, and arch bridges. Among them, arch bridges have gradually become the first choice of design units and construction units due to their reasonable structural force, small amount of steel and low cost. Arch bridges are generally divided into steel tube arch bridges, steel box arch bridges, truss arch bridges, etc. The main erection methods include scaffolding method, vertical rotation method, cable hoisting method, lifting method, etc. However, for large-span steel box arch bridges, due to the characteristics of high arch rib height, large arch rib cross-section, and heavy segment weight, the use of scaffolding method, vertical rotation and other methods often have complex site conditions, high safety risks, tight construction period, and high cost.

[0003] Therefore, it is urgent to design and develop a method for accurate closure of arch ribs without matching cut segments to improve the construction efficiency of large-span arch ribs. Summary of the invention

[0004] The object of the present invention is to provide a device for fine-tuning and closure of arch ribs without matching cutting segments and a construction method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides a device for fine-tuning and merging arch ribs without matching cutting segments, wherein the tension adjustment device comprises a fixed plate installed on the in-situ assembled arch ribs, an adjustment plate installed on the low-position assembled arch ribs, and a precision adjustment part, wherein the precision adjustment part is installed between the fixed plate and the adjustment plate, and an installation hole is provided on the fixed plate and at a position corresponding to the precision adjustment part, and a connecting hole is provided on the adjustment plate and at a position corresponding to the precision adjustment part.

[0006] The precision adjustment part includes a locking sleeve, a positioning sleeve, a locking part, a test piece and a positioning precision adjustment part. The locking sleeve passes through the mounting hole and the connecting hole respectively. The positioning sleeve is fixedly sleeved on one end of the locking sleeve, and the locking part is installed on the outside of the positioning sleeve. The locking part is connected to the fixing plate. The trial connection piece is installed between the locking sleeve and the fixed plate, and the trial connection piece assists the locking sleeve in connection with the connecting hole. The positioning precision adjustment piece is installed on the locking sleeve, and the positioning precision adjustment piece is used to perform precise adjustment on the adjustment plate.

[0007] Wherein, the locking member comprises a first limiting block, a second limiting block and a locking member, the first limiting block is larger in shape and size than the second limiting block, one side of the fixing plate is provided with two limiting grooves for moving the first limiting block and the second limiting block, and the two limiting grooves are connected with the mounting hole, and the fixing plate is also provided with an entry port connected with the limiting groove, and the first limiting block and the second limiting block respectively enter the limiting groove through the entry port; The locking piece is mounted on the fixing plate, and a locking hole is provided on the locking sleeve at a position corresponding to the locking piece, and the locking sleeve is detachably connected to the fixing plate through a locking piece.

[0008] Among them, the locking piece includes a locking rod, a locking plate and a locking spring, one end of the locking rod passes through the fixed plate and is engaged with the locking hole, and the end of the locking rod away from the fixed plate is fixedly connected to the locking plate, the locking rod is slidably connected to the fixed plate, the locking spring is sleeved on the outside of the locking rod, and the two ends of the locking spring are respectively fixedly connected to the fixed plate and the locking plate, and the locking hole is connected through the provided locking piece.

[0009] Among them, the trial connection piece includes a mounting plate, a connecting spring and a connecting block. There are two mounting plates, one end of each of which is detachably mounted on a fixing plate by bolts. One end of the connecting spring is fixedly connected to the mounting plate, and the other end of the connecting spring is fixedly connected to the connecting block. The connecting block is fixedly mounted on the outside of one end of a positioning sleeve. Through the trial connection piece, the positioning sleeve can be pressed so that the positioning sleeve can be quickly inserted into the connecting hole of the adjustment plate being lifted.

[0010] Among them, the precise positioning adjustment part includes an electric push rod, a pushing part, a front and rear return part and a fixing part. The electric push rod is fixedly installed inside the locking sleeve. The output end of the electric push rod is fixedly connected to the pushing part, and the pushing part is connected to the front and rear return part. The front and rear return part is used to adjust the position of the adjustment plate. The fixing part is located on the positioning sleeve, and the fixing part is used to lock the positioning sleeve and the connecting hole. Through the precise positioning adjustment part, the adjustment plate on the lifted low-position assembled arch rib and the fixed plate at the fixed in-situ assembled arch rib can be quickly connected.

[0011] Among them, the pushing member includes a first pushing block, a connecting frame, a pushing rod and a second pushing block, the output end of the electric push rod is fixedly connected to the first pushing block, and one end of the connecting frame is fixedly installed on the outside of the first pushing block, the other end of the connecting frame is fixedly connected to the pushing rod, and the other end of the pushing rod is connected to the second pushing block, the first pushing block and the second pushing block are both arranged on a side away from the electric push rod with a pushing inclined surface, and the two pushing inclined surfaces are connected to the front and rear return members, the fixing member is connected to the pushing rod, and the front and rear return members and the fixing member are pushed by the provided pushing member.

[0012] Wherein, the front and rear return parts include a first locking block and a second locking block, and the positioning sleeve is provided with a moving opening at positions corresponding to the first locking block and the second locking block, and the first locking block and the second locking block slide through the moving openings respectively, and the first locking block and the second locking block are respectively provided with a connecting inclined surface on one side close to the pushing inclined surface, and the connecting inclined surface is slidably connected with the pushing inclined surface; The first locking block and the second locking block are both provided with a moving opening, and a plurality of telescopic springs are fixedly connected inside the moving opening. One end of the plurality of telescopic springs is fixedly connected to the positioning sleeve, and the front and rear return parts are provided to realize the function of quickly adjusting the distance between the adjustment plate and the fixed plate, thereby further realizing the rapid and precise adjustment of the joint opening.

[0013] wherein the fixing member comprises a support plate, a fixed support rod and a pushing support rod, wherein the support plate is provided with a plurality of, the plurality of support plates are arranged around the outer side of the positioning sleeve, and each of the support plates is provided with two fixed support rods on a side close to the positioning sleeve, one end of the fixed support rod is rotatably connected to the support plate through a hinge support, and the other end of the fixed support rod is rotatably connected to the positioning sleeve through a hinge support, one end of the pushing support rod is rotatably connected to the support plate through a hinge support, and pushing openings are provided on the positioning sleeve and at positions corresponding to the plurality of pushing support rods, and the pushing support rod slides through the pushing openings, and the other end of the pushing support rod is rotatably connected to the pushing rod through a hinge support, and through the fixing member provided, the positioning sleeve can be fixed relative to the connecting hole of the adjustment plate, and at the same time, the adjustment plate is locked.

[0014] The present invention also provides a method for fine-tuning and closure construction of arch ribs without matching cutting segments, comprising the following steps: Step 1: Conduct trial lifting, monitor the key parts of the in-situ and low-position assembled arch ribs and complete safety verification; Step 2: Start the formal lifting. Under the condition of continuous meteorological monitoring, keep the horizontal cable stable and carry out cyclic lifting. The lifting height of each cycle is 250mm and the lifting speed is 5m / h. After reaching the position, perform the high-altitude temporary locking and closure adjustment. Step 3: Measure the size of the joint groove and make deviation corrections. Adjust the vertical elevation by lifting the jack and set the jacking device to perform displacement fine-tuning: when the deviation is greater than 10mm, use the horizontal cable tensioning adjustment; when the deviation is less than 10mm, use the pulling adjustment device and the code plate to coordinate the adjustment; Step 4: After completing the gap and misalignment adjustment of the joint mouth, perform temporary locking, joint welding and arch rib parallel joint installation welding in sequence; Step 5: Build a lifting control system based on digital twin technology to implement real-time monitoring and display of vertical lifting cable force, horizontal tensioning cable force, lifting height and synchronization accuracy.

[0015] The present invention has at least the following beneficial effects: (1) Compared with the traditional construction method, the overall arch rib lifting method of the present invention reduces the installation height of the arch rib assembly bracket, reduces the risk of on-site construction operations, and shortens the construction period.

[0016] (2) The present invention adopts the method of lifting and closing the joint without cutting the matching segments for the first time. Compared with the traditional method of setting up 2m closing segments for closing the joint, the workload of on-site lifting and welding is reduced, thereby reducing the construction cost.

[0017] (3) The present invention provides an arch rib assembly bracket and a lifting tower above the main beam, eliminating the need for foundation construction on the ground, thereby reducing construction difficulty and being more economical and reasonable.

[0018] (4) The present invention can fine-tune the height difference of the joint mouth through the single action and linkage action of the vertical lifting jack; adjust the joint gap through the tensioning action of the horizontal cable; and achieve high-precision joint closure by adjusting the lateral deviation through the jack.

[0019] (5) The present invention can meet the requirements of lifting construction for arch ribs of different spans, can reasonably divide the segment positions and bracket arrangements according to on-site construction conditions, and has strong applicability.

[0020] (6) The present invention uses intelligent detection technology and digital twin technology to develop an overall lifting control and display system, which realizes intelligent monitoring of stress, cable force and deformation during the overall lifting of the arch rib, thereby ensuring construction safety.

[0021] (7) When the present invention is in use, by means of the provided pulling adjustment device, after the middle long span arch rib is lifted into place, the mounting plate on the middle long span arch rib can be quickly and accurately connected through the precise adjustment parts on the fixed plate, while the connection position of the joint mouth can be ensured, thereby further realizing the rapid and precise joint adjustment of the arch rib without matching cutting sections. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a layout diagram of the arch rib assembly bracket of the present invention; Figure 2 This is a schematic diagram of the arch rib lifting state of the present invention; Figure 3 It is a structural schematic diagram of the closure state of the arch rib of the present invention; Figure 4 It is a front view of the closure state of the arch rib of the present invention; Figure 5 It is a structural schematic diagram of the pull adjustment device of the present invention; Figure 6 This is a schematic diagram of the fixing plate structure of the present invention; Figure 7 It is a schematic diagram of the structure of the locking member of the present invention; Figure 8 This is a schematic diagram of the locking hole structure of the present invention; Fig. 9 It is a schematic diagram of the cross-sectional structure of the adjustment plate of the present invention; Fig.10 This is a schematic diagram of the support plate structure of the present invention; Fig.11 It is a schematic diagram of the side cross-sectional structure of the positioning sleeve of the present invention; Fig.12 It is a schematic diagram of the structure of the front and rear return parts of the present invention.

[0023] In the figure: 1, pull adjustment device; 2, fixing plate; 21, limit groove; 22, entry port; 23, mounting hole; 3, adjustment plate; 31, connection hole; 4, precision adjustment member; 5, locking sleeve; 6, positioning sleeve; 61, locking hole; 62, push port; 7, locking member; 71, first limit block; 72, second limit block; 73, locking member; 731, locking rod; 732, locking plate; 733, locking spring; 8, test piece; 81, mounting plate; 82, connection spring; 83. Connecting block; 9. Positioning precision adjustment member; 91. Electric push rod; 92. Pushing member; 921. First pushing block; 922. Connecting frame; 923. Pushing rod; 924. Second pushing block; 925. Pushing inclined plane; 93. Front and rear returning members; 931. First locking block; 932. Second locking block; 933. Connecting inclined plane; 934. Moving port; 935. Telescopic spring; 94. Fixing member; 941. Opening plate; 942. Fixing support rod; 943. Pushing support rod. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Embodiment 1 The present invention is achieved through the following technical solutions: S1: According to the working performance of the beam erecting crane and the on-site construction conditions, the arch rib is divided into two parts: the in-situ assembly section and the low-position assembly section, and the beam erecting crane is used to assemble and erect from the arch foot position at one end to the other end; S2: Arch rib assembly brackets are divided into two types: in-situ assembly brackets and low-position assembly brackets. They are arranged according to the segmented position of the arch ribs. Each segment of the arch rib has no less than one assembly bracket. The assembly brackets are arranged at the top plate of the upper chord member and adopt a prefabricated truss structure. The assembly bracket columns are designed as double-column and three-column structures, using φ325×8mm steel pipes, with a double-column spacing of 3m; the straight web and diagonal web use φ114×4mm steel pipes. The bracket height is determined by lofting according to the arch rib assembly rise, ranging from 6.2 to 27.5m. The standard section length is divided into three modules of 2.5m, 4.5m, and 6.5m. In order to improve the on-site construction efficiency and assembly quality, the standard section of the bracket is connected by flange bolts. In order to ensure the longitudinal and transverse stability of the bracket, the column bracket is set with transverse and longitudinal connection systems according to the calculated structure.

[0026] S3: The lifting bracket is arranged at the positions corresponding to the nodes of the upper chord members at both ends of the arch rib of the low-position assembly section. The lifting bracket adopts a tube truss portal structure, with a truss height of 42m and a width of 16.5m. It is composed of a bottom distribution beam, a column, a crossbeam connection system and a top distribution beam, and is provided with stability measures such as a cable wind rope. The bracket column adopts a φ630×14mm steel pipe double-column structure, which is divided into four sections in the height direction, and the columns are connected by flange bolts. A transverse box-type distribution beam is set at the bottom of the column and welded to the upper chord. A space truss distribution beam is set at the top of the column for the arrangement of the vertical lifting jack. In order to increase the stability of the lifting bracket, 4 transverse connection systems are set between the columns on both sides, and the height spacing of each is 9m.

[0027] S4: The horizontal box-type distribution beam at the bottom of the column adopts a welded box structure with a structural dimension of 800×1000×16000mm. The two distribution beams are connected into a whole with a horizontal brace. The spacing is the same as the spacing between the double columns of the lifting bracket, which is 4m.

[0028] S5: The column top distribution beam adopts a spatial truss structure with a structural size of 3150×5200*16500mm. The upper and lower chords of the truss are both 650×600mm welded box beams, the web members are φ325×12mm steel pipes, and the horizontal braces are [18 channel steel. The column top distribution beam is connected to the support column by welding, and a diagonal brace is installed at the cantilever position for reinforcement. An 800×800mm welded box distribution beam is arranged on the upper part of the column top distribution beam to support the lifting jack.

[0029] S6: In order to improve construction efficiency and reduce the risk of high-altitude operations, the arch rib assembly brackets and arch rib lifting brackets are assembled into large sections under the bridge and then hoisted as a whole or in large sections.

[0030] S7: The vertical lifting system is mainly composed of lifting lugs and anchor beams, vertical lifting cables, distribution beams, guide frames, through-hole jacks, pump stations, control centers and other structures and equipment. During the factory processing, the arch ribs are welded with lifting lugs according to the lifting point positions and connected through anchor beams to form a lifting cable anchoring structure.

[0031] S8: The weight of the lifting arch rib is 1100t. Considering the 1.2 times uneven coefficient and impact load, the single-point lifting load is 330t. Four 560t core-penetrating jacks are used for synchronous lifting. 33 φ15.2mm (1860MPa) steel strands are used for the single lifting point.

[0032] S9: Based on the structural stress calculation results, in order to ensure the structural stress requirements, an internal partition is added inside the arch rib in the anchor area for reinforcement.

[0033] S10: The arch rib lifting steel anchor beam A adopts a welded box structure, which consists of an anchor beam box, an anchor pad, a lower ear plate, a pin shaft and other structures, with a structural size of 700×1490×1700mm. The upper and lower flange plates of the anchor beam box are provided with lifting cable strand threading holes (5×7 rows, φ20mm), and an anchor pad is set on the lower flange plate. The lower ear plate of the anchor beam is arranged on both sides according to the size of the arch rib web plate, and the single-side ear plate adopts a double-ply plate form, which is connected to the arch rib lifting ear through a φ143mm pin shaft (made of 40CrNiMo).

[0034] S11: In order to control the deformation of the arch rib during lifting, a horizontal cable tensioning system is set on the outer side of the arch rib web. The stability of the arch rib during lifting is controlled by applying horizontal tensioning force, and the chord length of the arch section can be adjusted by releasing the horizontal cable, thereby adjusting the accuracy of the joint.

[0035] S12: The horizontal tensioning system consists of φ15.2mm steel strand, 350t core jack, reaction seat, anchor, hydraulic pump station and control system.

[0036] S13: The horizontal cable anchoring structure is a welded box structure with a reserved steel strand threading hole in the middle, which is welded to the outside of the arch rib web. The horizontal cable steel anchor beam B is set at the outside web of the arch section on both sides of the lifting arch rib. It adopts a welded box structure with a structural size of 700×800×900mm. It is welded to the outside web of the arch rib, and a horizontal cable threading hole is set in the center of the box. Two bundles of horizontal cables are set on the single-side arch rib. Each bundle of horizontal cables consists of 31 φ15.2 steel strands and is equipped with a 350t through-hole jack for single-end tensioning; See also Figures 1 to 4 A method for fine-tuning and closure construction of arch ribs without matching cutting segments comprises the following steps: Step 1: Before the formal lifting, a trial lift should be conducted to verify the safety of the structure and the jack system during the lifting process. The method of trial lifting is as follows: 20% initial tension of horizontal cable → 20% application of lifting cable → 40% initial tension of horizontal cable → 40% application of lifting cable → alternating (five levels in total, 20% increase each level) until the arch rib is 10cm away from the bracket, lock the jack and leave it still for observation. During the static period, observe the deformation of the structure, check the node position, check the pressure retention of the jack and the deformation of the lifting frame; Step 2: During the trial lifting process, the key parts of the in-situ assembled arch ribs and the low-position assembled arch ribs are inspected. The main inspection items are: ① Through the stress elements pre-buried in the key parts of the arch ribs, the stress on the middle arch ribs, the displacement of the arch crown and arch foot, the deviation of the axis, and the change of the temporary cable force under the lifting state are detected; ② The lifting system is run without load, and the components of the lifting equipment such as jacks, oil pumps, anchors, etc. are checked to see if they are operating normally, and whether the computer control system is operating normally; ③ Whether the data collection, processing, display and output processes of the digital twin system are operating normally. ④ The quality, wear, wire breakage, steering arrangement, friction, etc. of the steel strands, and whether the cable threading is correct; ⑤ Check the anchoring structure, the stress of the hanging point, and measure whether the deformation meets the requirements; Step 3: During the trial lifting, if everything is normal, you can start the formal lifting. Continue to observe the weather. When the conditions for arch rib lifting are met, keep the horizontal cable stable, and carry out cyclic lifting of the arch rib. The lifting height of each cycle is 250mm, and the lifting speed is 5m / h. After the arch rib is lifted into place, it is temporarily locked at high altitude, and then the arch rib joint is adjusted. If the misalignment of the interface is large, adjust it by starting the single-point lifting jack, and then use the pulling adjustment device 1 and the code plate for fine adjustment. After the interface is adjusted, immediately arrange welding personnel to weld the interface; In order to ensure that the low-position assembled arch ribs can be smoothly lifted into place and accurately closed, the joint ring seam of the closed section is designed to be wedge-shaped; Step 4: After the arch rib is lifted into place, measure the size of the joint bevel and make precise adjustments to the out-of-tolerance items. The fine-tuning items of the arch rib joint mainly include vertical elevation, longitudinal spacing, and lateral deviation to ensure that the size of the joint bevel meets the review specification requirements. The vertical elevation of the joint is adjusted by lifting and lowering a single lifting jack; a jacking device is set at the joint to fine-tune the displacement of the joint. If the deviation is greater than 10mm, adjust it by releasing the horizontal cable; if the deviation is less than 10mm, use the tensioning adjustment device 1 and the code plate to fine-tune the joint; Step 5: After the gap and misalignment of the arch rib joint are adjusted in place, temporary locking and joint welding are carried out in time. A 300×400mm manhole is reserved on the arch rib top plate, and the bottom plate groove is opened on the inside of the box body for horizontal welding; the web grooves on both sides are opened on the outside of the box body for vertical welding; the top plate groove is opened on the outside of the box body, and the final welding is carried out after the box body welds and flaw detection are qualified. After the arch rib joint welding is completed, the arch rib flat joint is installed and welded; Step six: Develop an overall lifting control system, use digital twin technology to monitor the vertical lifting cable force, horizontal tensioning cable force, lifting height and synchronous lifting accuracy in real time, and display them in real time on the display screen.

[0037] A device for fine-tuning and merging arch ribs without matching cutting segments, wherein the tension adjustment device 1 comprises a fixed plate 2 installed on the in-situ assembled arch rib, an adjustment plate 3 installed on the low-position assembled arch rib and a precision adjustment part 4, wherein the precision adjustment part 4 is installed between the fixed plate 2 and the adjustment plate 3, a mounting hole 23 is provided on the fixed plate 2 and at a position corresponding to the precision adjustment part 4, and a connecting hole 31 is provided on the adjustment plate 3 and at a position corresponding to the precision adjustment part 4.

[0038] See also Figures 5 to 12 The precision adjustment member 4 includes a locking sleeve 5, a positioning sleeve 6, a locking member 7, a test piece 8 and a positioning precision adjustment member 9. The locking sleeve 5 passes through the mounting hole 23 and the connecting hole 31 respectively. The positioning sleeve 6 is fixedly sleeved on one end of the locking sleeve 5, and the locking member 7 is installed on the outside of the positioning sleeve 6. The locking member 7 is connected to the fixing plate 2. The trial connection piece 8 is installed between the locking sleeve 5 and the fixed plate 2 , and the trial connection piece 8 assists the locking sleeve 5 to connect with the connecting hole 31 . The positioning precision adjustment piece 9 is installed on the locking sleeve 5 , and the positioning precision adjustment piece 9 is used to perform precise adjustment on the adjustment plate 3 .

[0039] The locking member 7 includes a first limiting block 71, a second limiting block 72 and a locking member 73. The first limiting block 71 is larger in shape and size than the second limiting block 72. By setting the first limiting block 71 and the second limiting block 72 to be different in shape and size, the specific angle between the locking sleeve 5 and the positioning sleeve 6 inserted into the connecting hole 31 and the mounting hole 23 can be further limited. One side of the fixing plate 2 is provided with two limiting grooves 21 for moving the first limiting block 71 and the second limiting block 72, and the two limiting grooves 21 are connected to the mounting hole 23. The fixing plate 2 is also provided with an entry port 22 connected to the limiting groove 21. The first limiting block 71 and the second limiting block 72 respectively enter the limiting groove 21 through the entry port 22. The locking member 73 is mounted on the fixing plate 2 , and a locking hole 61 is provided on the locking sleeve 5 at a position corresponding to the locking member 73 .

[0040] The locking member 73 includes a locking rod 731, a locking plate 732 and a locking spring 733. One end of the locking rod 731 passes through the fixing plate 2 and is clamped with the locking hole 61, and the end of the locking rod 731 away from the fixing plate 2 is fixedly connected to the locking plate 732. The locking rod 731 is slidably connected to the fixing plate 2. The locking spring 733 is sleeved on the outside of the locking rod 731, and the two ends of the locking spring 733 are fixedly connected to the fixing plate 2 and the locking plate 732 respectively. The test piece 8 includes a mounting plate 81, a connecting spring 82 and a connecting block 83. Two mounting plates 81 are provided. One end of each of the two mounting plates 81 is detachably mounted on the fixing plate 2 by bolts. One end of the connecting spring 82 is fixedly connected to the mounting plate 81, and the other end of the connecting spring 82 is fixedly connected to the connecting block 83. The connecting block 83 is fixedly mounted on the outer side of one end of the positioning sleeve 6. Specific implementation process: During the process of lifting the low-position assembled arch rib, the staff inserts one end of the positioning sleeve 6 into the mounting hole 23 on the fixing plate 2, and at the same time, fixes the two mounting plates 81 on one side of the positioning sleeve 6 on the fixing plate 2 by bolts. At this time, the positioning sleeve 6 is relatively connected to the fixing plate 2 through the two connecting springs 82 on its outer side. At the same time, the locking sleeve 5 is not connected to the mounting hole 23. In this state, the locking sleeve 5 can be pressed to move the positioning sleeve 6 relative to the mounting hole 23. When the locking rib 71 is in the closed position, the staff will press the locking sleeve 5 quickly, so that the positioning sleeve 6 can be quickly inserted into the connecting hole 31 of the adjusting plate 3 of the low-position assembled arch rib, until the locking sleeve 5 is inserted into the mounting hole 23, and at the same time, the first limit block 71 and the second limit block 72 on the locking sleeve 5 are respectively aligned with the two entrance openings 22, and then, the locking sleeve 5 is rotated, so that the first limit block 71 and the second limit block 72 are respectively engaged with the two limit grooves 21, and at the same time, the locking rod 731 is engaged with the locking hole 61 of the locking sleeve 5 under the connecting action of the locking spring 733, so that the locking sleeve 5 and the fixing plate 2 are further relatively fixed. At this time, the locking sleeve 5 is connected with the adjusting plate 3, further assisting the low-position assembled arch rib to be quickly connected with the original-position assembled arch rib, and preventing the low-position assembled arch rib from continuing to shake due to untimely connection when it is lifted to the closed position.

[0041] The positioning precision adjustment member 9 includes an electric push rod 91, a pushing member 92, a front-rear return member 93 and a fixing member 94. The electric push rod 91 is fixedly installed inside the locking sleeve 5. The output end of the electric push rod 91 is fixedly connected to the pushing member 92, and the pushing member 92 is connected to the front-rear return member 93. The front-rear return member 93 is used to adjust the position of the adjustment plate 3. The fixing member 94 is located on the positioning sleeve 6, and the fixing member 94 is used to lock the positioning sleeve 6 with the connecting hole 31. The push member 92 includes a first push block 921, a connecting frame 922, a push rod 923 and a second push block 924. The output end of the electric push rod 91 is fixedly connected to the first push block 921, and one end of the connecting frame 922 is fixedly installed on the outside of the first push block 921, and the other end of the connecting frame 922 is fixedly connected to the push rod 923, and the other end of the push rod 923 is connected to the second push block 924. The first push block 921 and the second push block 924 are both provided with a push inclined surface 925 on one side away from the electric push rod 91, and the two push inclined surfaces 925 are connected to the front and rear return members 93, and the fixing member 94 is connected to the push rod 923; The front and rear return member 93 includes a first locking block 931 and a second locking block 932. A moving opening 934 is provided on the positioning sleeve 6 at positions corresponding to the first locking block 931 and the second locking block 932. The first locking block 931 and the second locking block 932 slide through the moving opening 934 respectively. A connecting inclined surface 933 is provided on the side of the first locking block 931 and the second locking block 932 close to the push inclined surface 925 respectively. The connecting inclined surface 933 is slidably connected to the push inclined surface 925. The first locking block 931 and the second locking block 932 in the present invention are both provided with a pushing end on the side close to the adjustment plate 3, and the pushing end is used to push the adjustment plate 3. The first locking block 931 and the second locking block 932 are both provided with a moving opening 934, and a plurality of telescopic springs 935 are fixedly connected inside the moving opening 934, and one end of the plurality of telescopic springs 935 is fixedly connected to the positioning sleeve 6; The fixing member 94 includes a support plate 941, a fixed support rod 942 and a pushing support rod 943. There are multiple support plates 941, and the multiple support plates 941 are arranged around the outer side of the positioning sleeve 6. The support plates 941 are arranged in an arc shape. At the same time, there are multiple anti-slip grooves on the support plate 941. Two fixed support rods 942 are arranged on the side of each support plate 941 close to the positioning sleeve 6. One end of the fixed support rod 942 is rotatably connected to the support plate 941 through a hinge support, and the other end of the fixed support rod 942 is rotatably connected to the positioning sleeve 6 through a hinge support. One end of the pushing support rod 943 is rotatably connected to the support plate 941 through a hinge support. Pushing ports 62 are provided on the positioning sleeve 6 and at positions corresponding to the multiple pushing support rods 943, and the pushing support rod 943 slides through the pushing port 62, and the other end of the pushing support rod 943 is rotatably connected to the pushing rod 923 through a hinge support. Specific implementation process: After the positioning sleeve 6 is inserted into the connection hole 31 of the adjustment plate 3 of the low-position assembled arch rib, and the positioning sleeve 6 and the fixed plate 2 are relatively fixed, then at this time, the electric push rod 91 is operated, and the first push block 921, the connecting frame 922, the push rod 923 and the second push block 924 are further moved inside the positioning sleeve 6: When the push rod 923 moves, the multiple push rods 943 on the outside are synchronously driven to rotate and move. At the same time, the opening plate 941 connected to the other end of the push rod 943 moves along the inner wall of the connecting hole 31 under the limiting action of the two fixed rods 942 until the multiple opening plates 941 are relatively fixed to the connecting hole 31. When the plurality of expansion plates 941 are connected to the connection holes 31, the first pushing block 921 and the second pushing block 924 are pushed by the pushing inclined surfaces 925 on one side, so that the first locking block 931 and the second locking block 932 are moved through the connecting inclined surfaces 933 thereon, that is, the first locking block 931 and the second locking block 932 are respectively moved along the outer side of the moving opening 934, and when the first locking block 931 and the second locking block 932 are moved, due to the limit of the pushing end, the position of the adjustment plate 3 is further adjusted, and when the position of the adjustment plate 3 is adjusted, the joint of the low-position assembled arch rib at the adjustment plate 3 and the original assembled arch rib is further adjusted accurately and quickly, and when the plurality of expansion plates 941 are fixed to the connection holes 31, the first locking block 931 and the second locking block 932 synchronously lock the position of the adjustment plate 3.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for fine-tuning and closure of arch ribs without matching cut segments, comprising a tension adjustment device (1), characterized in that: The tension adjustment device (1) comprises a fixing plate (2) mounted on the in-situ assembled arch rib, an adjustment plate (3) mounted on the low-position assembled arch rib, and a precision adjustment member (4); the precision adjustment member (4) is mounted between the fixing plate (2) and the adjustment plate (3); a mounting hole (23) is provided on the fixing plate (2) at a position corresponding to the precision adjustment member (4); and a connection hole (31) is provided on the adjustment plate (3) at a position corresponding to the precision adjustment member (4).

2. The device for fine-tuning and closure of arch ribs without matching cut segments according to claim 1 is characterized in that: The precision adjustment member (4) comprises a locking sleeve (5), a positioning sleeve (6), a locking member (7), a test piece (8) and a positioning precision adjustment member (9), wherein the locking sleeve (5) respectively passes through between the mounting hole (23) and the connecting hole (31), the positioning sleeve (6) is fixedly sleeved on one end of the locking sleeve (5), and the locking member (7) is mounted on the outside of the positioning sleeve (6), and the locking member (7) is connected to the fixing plate (2); The trial connection piece (8) is installed between the locking sleeve (5) and the fixing plate (2), and the trial connection piece (8) assists the locking sleeve (5) in connecting with the connecting hole (31). The positioning precision adjustment piece (9) is installed on the locking sleeve (5), and the positioning precision adjustment piece (9) is used to perform precise adjustment on the adjustment plate (3).

3. The device for fine-tuning and closure of arch ribs without matching cutting segments according to claim 2 is characterized in that: The locking member (7) comprises a first limiting block (71), a second limiting block (72) and a locking member (73); the first limiting block (71) is larger in shape and size than the second limiting block (72); one side of the fixing plate (2) is provided with two limiting grooves (21) for moving the first limiting block (71) and the second limiting block (72); the two limiting grooves (21) are connected to the mounting hole (23); the fixing plate (2) is also provided with an entry port (22) connected to the limiting groove (21); the first limiting block (71) and the second limiting block (72) respectively enter the limiting groove (21) through the entry port (22); The locking piece (73) is mounted on the fixing plate (2), and a locking hole (61) is provided on the locking sleeve (5) at a position corresponding to the locking piece (73).

4. The device for fine-tuning and closure of arch ribs without matching cutting segments according to claim 3 is characterized in that: The locking member (73) comprises a locking rod (731), a locking plate (732) and a locking spring (733); one end of the locking rod (731) passes through the fixing plate (2) and is engaged with the locking hole (61); one end of the locking rod (731) away from the fixing plate (2) is fixedly connected to the locking plate (732); the locking rod (731) is slidably connected to the fixing plate (2); the locking spring (733) is sleeved on the outside of the locking rod (731); and two ends of the locking spring (733) are respectively fixedly connected to the fixing plate (2) and the locking plate (732).

5. The device for fine-tuning and closure of arch ribs without matching cutting segments according to claim 2 is characterized in that: The test piece (8) comprises a mounting plate (81), a connecting spring (82) and a connecting block (83), wherein two mounting plates (81) are provided, one end of each of the two mounting plates (81) is detachably mounted on the fixing plate (2) by means of bolts, one end of the connecting spring (82) is fixedly connected to the mounting plate (81), and the other end of the connecting spring (82) is fixedly connected to the connecting block (83), and the connecting block (83) is fixedly mounted on the outside of one end of the positioning sleeve (6).

6. The device for fine-tuning and closure of arch ribs without matching cut segments according to claim 2 is characterized in that: The positioning precision adjustment member (9) comprises an electric push rod (91), a pushing member (92), a front-rear return member (93) and a fixing member (94); the electric push rod (91) is fixedly mounted inside the locking sleeve (5); the output end of the electric push rod (91) is fixedly connected to the pushing member (92), and the pushing member (92) is connected to the front-rear return member (93); the front-rear return member (93) is used to adjust the position of the adjustment plate (3); the fixing member (94) is located on the positioning sleeve (6), and the fixing member (94) is used to lock the positioning sleeve (6) with the connecting hole (31).

7. The device for fine-tuning and closure of arch ribs without matching cut segments according to claim 6 is characterized in that: The pushing member (92) comprises a first pushing block (921), a connecting frame (922), a pushing rod (923) and a second pushing block (924); the output end of the electric push rod (91) is fixedly connected to the first pushing block (921), and one end of the connecting frame (922) is fixedly mounted on the outside of the first pushing block (921); the other end of the connecting frame (922) is fixedly connected to the pushing rod (923), and the other end of the pushing rod (923) is connected to the second pushing block (924); the first pushing block (921) and the second pushing block (924) are both provided with a pushing inclined surface (925) on one side away from the electric push rod (91), and the two pushing inclined surfaces (925) are connected to the front and rear return members (93); and the fixing member (94) is connected to the pushing rod (923).

8. The device for fine-tuning and closure of arch ribs without matching cutting segments according to claim 7 is characterized in that: The front-rear return member (93) comprises a first locking block (931) and a second locking block (932); a moving opening (934) is provided on the positioning sleeve (6) at positions corresponding to the first locking block (931) and the second locking block (932); the first locking block (931) and the second locking block (932) respectively slide through the moving opening (934); a connecting inclined surface (933) is provided on one side of the first locking block (931) and the second locking block (932) close to the pushing inclined surface (925); and the connecting inclined surface (933) is slidably connected to the pushing inclined surface (925); The first locking block (931) and the second locking block (932) are both provided with a moving opening (934), a plurality of telescopic springs (935) are fixedly connected inside the moving opening (934), and one end of the plurality of telescopic springs (935) is fixedly connected to a positioning sleeve (6).

9. The device for fine-tuning and closure of arch ribs without matching cutting segments according to claim 7 is characterized in that: The fixing member (94) comprises an opening plate (941), a fixing support rod (942) and a pushing support rod (943). A plurality of opening plates (941) are provided. The plurality of opening plates (941) are arranged around the outside of the positioning sleeve (6). Two fixing support rods (942) are arranged on a side of each opening plate (941) close to the positioning sleeve (6). One end of the fixing support rod (942) is rotatably connected to the opening plate (941) via a hinge support, and the other end of the fixing support rod (942) is rotatably connected to the positioning sleeve (6) via a hinge support. One end of the pushing support rod (943) is rotatably connected to the opening plate (941) via a hinge support. Pushing openings (62) are provided on the positioning sleeve (6) at positions corresponding to the plurality of pushing support rods (943), and the pushing support rod (943) slides through the pushing openings (62). The other end of the pushing support rod (943) is rotatably connected to the pushing rod (923) via a hinge support.

10. A method for fine-tuning and closure construction of arch ribs without matching cutting segments, characterized in that: The following steps are involved: Step 1: Conduct trial lifting, monitor the key parts of the in-situ and low-position assembled arch ribs and complete safety verification; Step 2: Start the formal lifting. Under the condition of continuous meteorological monitoring, keep the horizontal cable stable and carry out cyclic lifting. The lifting height of each cycle is 250mm and the lifting speed is 5m / h. After reaching the position, perform the high-altitude temporary locking and closure adjustment. Step 3: Measure the size of the joint groove and make deviation corrections. Adjust the vertical elevation by lifting the jack and set the jacking device to perform displacement fine-tuning: when the deviation is greater than 10mm, use the horizontal cable tensioning adjustment; when the deviation is less than 10mm, use the pulling adjustment device and the code plate to coordinate the adjustment; Step 4: After completing the gap and misalignment adjustment of the joint mouth, perform temporary locking, joint welding and arch rib parallel joint installation welding in sequence; Step 5: Build a lifting control system based on digital twin technology to implement real-time monitoring and display of vertical lifting cable force, horizontal tensioning cable force, lifting height and synchronous lifting accuracy.

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