Step-by-step bridge sliding construction technology

Abstract

The present invention provides a step-by-step bridge sliding construction process, S1, respectively install a mobile support unit, a lifting unit, a posture adjustment unit and a track push-pull unit on the top of the pier column; S2, hoist the bridge segment onto the mobile support unit after assembling it; S3, use a track clamp at the tail of the bridge segment to connect the bridge segment and the track, and through the telescopic push-pull action of the push-pull oil cylinder, the ground tank arranged on the reaction seat carries the bridge segment and continuously pushes the bridge segment along the direction of the track; S4, after the ground tank moves from the segment starting point on the surface of the reaction seat to the segment end point, the lifting oil cylinder lifts the bridge segment until the bridge segment and the shoulder pole beam on the ground tank are emptied, and the ground tank is moved back to the stage starting position on the reaction seat; S5, after the ground tank is in place, the lifting oil cylinder is retracted to transfer the load of the bridge segment to the ground tank again. The present invention greatly improves the construction process of the bridge and ensures the safety and convenience of the overall advancement.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, and in particular to a step-by-step bridge sliding construction process. Background Art

[0002] The jacking method is often used in the process of bridge erection, that is, a three-way movable jacking device is used to realize the lifting, jacking and deviation correction of the bridge segment. However, in the process of erecting high piers (pier height is higher than 40m), it is difficult to hoist and arrange the piers, and it is also difficult to move them manually, resulting in a long overall preparation process and inconvenience. In addition, in the process of traditional jacking, due to the existence of eccentric loading, it is usually judged whether the alignment of the bridge is out of tolerance by manually observing the position change of the shaft rod. Manual judgment is very inconvenient, there are many influencing factors, and there is no stable reference benchmark as the basis for decision-making, resulting in low overall construction efficiency and high labor intensity. Chinese patent document CN 110306445 A records a jacking device and a bridge jacking method for bridge jacking construction. The method adopts a traditional three-way oil cylinder to adjust the position from the bottom of the bridge. However, when facing different piers, due to the height difference of the piers, the overall jacking process has no stable judgment basis, and at the same time avoids the risk of beam drop. Whether the beam drop is stable is an important factor in the occurrence of eccentric loading, and this method has defects. Summary of the invention

[0003] The present invention provides a step-by-step bridge sliding construction process, which solves the problems that the device is relatively complex during the bridge stepping process, the lifting point of the bridge beam section cannot be monitored, and the bridge forms an eccentric load due to different supporting forces, which leads to unstable beam dropping and sliding or twisting to one side.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a step-by-step bridge sliding construction process, comprising the following steps:

[0005] S1. First, clean the top of the pier column, and then install the mobile support unit, jacking unit, posture adjustment unit and track push-pull unit respectively;

[0006] S2, hoisting the assembled bridge segments onto the shoulder beam of the mobile support unit;

[0007] S3. A rail clamp is used at the tail of the bridge segment to establish a connection between the bridge segment and the track. Through the telescopic push-pull action of the push-pull cylinder on one side of the rail clamp, the tank arranged on the reaction seat carries the bridge segment along the direction of the track to continuously push the bridge segment;

[0008] S4, after the ground tank located at the bottom of the bridge segment moves from the segment starting point on the reaction seat surface to the segment end point, the jacking cylinder on the jacking unit jacks up the bridge segment until the bridge segment and the shoulder beam on the ground tank are vacated, and the ground tank is moved back to the stage starting point position on the reaction seat;

[0009] S5. After the ground tank is in place, readjust the position of the shoulder beam on the ground tank, and then retract the jacking cylinder to transfer the load of the bridge segment to the ground tank again;

[0010] S6. Repeat S3 to S5 until the bridge segment is moved to the designed position.

[0011] In the preferred solution, during S3, when the bridge segment deviates greatly from the designed position in the transverse direction of the bridge, the direction of the ground tank is adjusted, and the side wall of the bridge segment is adjusted using the adjustment cylinder of the attitude adjustment unit until the position of the bridge segment is adjusted to within the set range.

[0012] In the preferred solution, the lifting cylinder is used to lift the bridge segment and the shoulder pole beam on the ground tank until the bridge segment and the shoulder pole beam on the ground tank are vacated, and then the shoulder pole beam between the two ground tanks is removed, and then the ground tank is rotated 90 degrees, and then the shoulder pole beam is installed on the ground tank, and the lifting cylinder is retracted to make the bridge segment beam on the shoulder pole beam;

[0013] Then use the lifting cylinder to lift the bridge segment again, adjust the ground tank and the shoulder beam to the original direction, and continue S3~S5 after dropping the beam.

[0014] In the preferred solution, the installation steps of the mobile support unit, the lifting unit, the posture adjustment unit and the track push-pull unit are:

[0015] A1. Check and clean the surface of the pier to ensure that the installation surface is relatively flat;

[0016] A2. Install the bottom foundation and track on the upper surface of the pier to ensure the track runs accurately, and then install the track clamp and push-pull cylinder;

[0017] A3. Place two reaction seats on both sides of the track, and adjust the height of the top of the reaction seats through the leveling unit on the reaction seats to ensure that the tops of the two reaction seats are roughly on the same horizontal plane;

[0018] A4. Install alignment units in the limiting surfaces on both sides of the track, connect the reaction seat and the track through the alignment units, and adjust the top positions of the two reaction seats to be precisely level;

[0019] A5. Install the fixing plate, the first limit support and the second limit support in the limit guide unit on the upper part of the reaction seat in sequence to ensure the accuracy of the position and direction;

[0020] A6. Place the ground tank into the path constraint space formed between the first limit support, the second limit support and the reaction seat, and then place the shoulder pole beam on the ground tanks on both sides;

[0021] A7. Fix the base plate on one side of the longitudinal bridge of the pier column, and then install the jacking cylinder;

[0022] A8. Fix the adjusting corbel to one side of the cross bridge of the pier column, and then install the adjusting cylinder.

[0023] In a preferred solution, the installation steps of the alignment unit are:

[0024] B1. According to the surface slope of the pier column, first compare the installation point of the reference block by the length of the tension plate and the position of the first locking rod;

[0025] B2. Connect the same side of the two tension plates to the first locking rod in the partition respectively, and then install the reference block on the other side of the two tension plates;

[0026] B3. Adjust the position of the reference block and fix it in the side groove of the track, while preventing the position of the reference block from interfering with the movement of the track clamp;

[0027] B4. Fine-tune the position of the tension plate and lock and secure both sides.

[0028] In a preferred solution, after the jacking unit is installed, two distance measuring modules are symmetrically installed on the jacking cylinder's top rod through an auxiliary plate in a direction perpendicular to the pier surface, and the working state of the distance measuring modules is debugged.

[0029] In the preferred solution, the installation steps of the limit guide unit are:

[0030] C1. Install the fixing plates in sequence along the longitudinal direction of the bridge, align the alignment rod at the bottom of the fixing plate with the through hole, align the limit rod with the installation hole, and sleeve the first spring on the alignment rod and lock it with a nut;

[0031] C2. The first limit support is directly locked and fixed on the fixing plate by a nut on the side close to the starting point of the bridge segment, and then the fixing plate is installed on the remaining fixing plates. The fixing plate is limited by the first spring and shrinks when subjected to greater force;

[0032] C3. Adjust the positions of the different second limiting supports to ensure that the central axis between the second limiting supports on both sides is coplanar with the central axes of the two fixing plates;

[0033] C4. Check the telescopic stress status of each second limit support and ensure that the functions are intact.

[0034] In the preferred solution, before the ground tank is placed on the reaction seat, the correction unit is first installed on the turntable of the ground tank, and then the shoulder pole beam is placed in the gap between the two push plates on the correction unit, and the position of the push plates is adjusted to ensure that the push plates fit the outer side of the shoulder pole beam.

[0035] In a preferred solution, the debugging steps of the ranging module include:

[0036] D1. Obtain the height difference of different piers confirmed in the early stage of the survey by consulting the documents, and extract the difference Hz of different piers according to the current pier positions;

[0037] D2. Turn on the two downward distance measurement modules on different piers to obtain the distances H1 and H2 from the auxiliary plate to the surface of each pier, and obtain the difference between the two. The difference between the two is the lifting height difference δHd between the lifting cylinders in the initial state;

[0038] D3, turn on the two upward distance measurement modules on different piers to obtain the distances H3 and H4 between the auxiliary plate and the bottom surface of the bridge segment, and obtain the difference between the two, recorded as δHm;

[0039] D4. Calculate the difference between the sum of δHd and δHm in the initial state and Hz, and take the average value after multiple measurements.

[0040] In the preferred solution, during the D4 process, when the difference is within the allowable range, the subsequent stepping process is performed. If it exceeds the tolerance, the position and state of the bridge segment are adjusted until the difference is within the allowable range. At the same time, during the jacking process, the moments δHd and δHm are ensured to be relatively stable.

[0041] The beneficial effects of the present invention are as follows: by using the track to provide a reference for the stepping process, the alignment unit synchronizes the direction of the reaction seat precisely with the track, thereby ensuring that the travel route of the ground tank is parallel to the pushing direction of the pushing cylinder on the track clamp, avoiding the problem of uneven force causing tension or even damage to the reaction seat, and the leveling unit can stably fit the reaction seat to the surface of the pier column, while being able to adapt to the slope changes of the pier column and the adjustment in multiple directions. The limit guide unit limits the ground tank within a certain range, and can unload the force through its own deformation when subjected to sudden loads, ensuring the overall safety. The correction unit provides a buffer unloading effect for the shoulder pole beam when torque is generated when it is not synchronized, which is safe and efficient. The distance measurement module initially obtains the position and state of the lifting units on different piers, and can provide a basis for judging whether the state of the bridge beam section is stable. In the process of bridge advancement, decisions are made, thereby reducing the problem of bridge correction due to eccentric loading, and the overall construction is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0043] Figure 1 It is a front view schematic diagram of the present invention in the middle of the bridge;

[0044] Figure 2 It is a schematic diagram of the right side view of the present invention in the middle of the bridge;

[0045] Figure 3 It is a front view schematic diagram of the present invention at the rear of the bridge;

[0046] Figure 4 It is a schematic diagram of the present invention at the right side of the rear end of the bridge;

[0047] Figure 5 It is a schematic diagram of the present invention advancing on different piers in state one;

[0048] Figure 6 It is a schematic diagram of the present invention advancing on different piers in state 2;

[0049] Figure 7 It is a top view schematic diagram of the installation and use of the distance measurement module of the present invention;

[0050] Figure 8 is an overall schematic diagram of the distance measurement module of the present invention;

[0051] Fig. 9 It is a schematic diagram of the ranging workflow of the present invention;

[0052] Fig.10 It is a schematic diagram of the installation of the mobile support unit of the present invention;

[0053] Fig.11 It is an overall schematic diagram of the connection work between the mobile support unit and the track of the present invention;

[0054] Fig.12 yes Fig.11 Schematic diagram of the left side;

[0055] Fig.13 yes Fig.11 A top view schematic diagram of

[0056] Fig.14 yes Fig.11 Schematic diagram of the overall structure;

[0057] Fig.15 yes Fig.11 Schematic diagram of the overall explosion structure;

[0058] Fig.16 It is a schematic diagram of the overall structure of the reaction seat installation limit guide unit of the present invention;

[0059] Fig.17 yes Fig.11 Schematic diagram of the explosion structure;

[0060] Fig.18 It is a schematic diagram of the overall structure of the reaction seat of the present invention;

[0061] Fig.19 yes Fig.18 A magnified schematic diagram of point A;

[0062] Fig. 20 It is a schematic diagram of the explosion structure of the second limiting support of the present invention;

[0063] Fig.21 It is a schematic diagram of the exploded structure of the deviation correction unit of the present invention;

[0064] Fig. 22 It is a structural schematic diagram of the deviation correction unit of the present invention installed on a ground tank.

[0065] In the figure: mobile support unit 1; reaction seat 101; ground tank 102; shoulder beam 103; first reinforcement plate 104; second reinforcement plate 105; top plate 106; turntable 107; first threaded hole 108; mounting hole 109; groove 110; first through hole 111; bottom plate 112; second threaded hole 113; first locking rod 114; partition 115; lifting unit 2; lifting cylinder 201; base plate 202; auxiliary plate 203; posture adjustment unit 3; adjustment bracket 301; adjustment cylinder 302; track push-pull unit 4; bottom foundation 401; track 402; track clamp 403; push-pull cylinder 404; limit guide unit 5; fixed plate 501; first limit support 502; second limit support 503; alignment rod 504; limit rod 506; protrusion 507; threaded rod 508; nut 509; first spring 511; leveling unit 6; alignment unit 7; reference block 701; adapter plate 702; second locking rod 703; tension plate 704; fourth through hole 705; deviation correction unit 8; first ring plate 801; second ring plate 802; partition plate 803; notch 804; curved rod 805; push plate 806; second spring 807; adapter plate 808; screw 809; stepped hole 810; distance measurement module 9; distance measurement sensor 901; base 902; pier 10; bridge segment 11. DETAILED DESCRIPTION

[0066] like Figure 1-22 A step-by-step bridge sliding construction process comprises the following steps:

[0067] S1. First, clean the top of the pier 10, and then install the mobile support unit 1, the lifting unit 2, the posture adjustment unit 3 and the track push-pull unit 4 respectively;

[0068] S2, after the bridge segment 11 is assembled, it is hoisted onto the shoulder beam 103 of the mobile support unit 1;

[0069] S3. A rail clamp 403 is used at the rear of the bridge segment 11 to establish a connection between the bridge segment 11 and the track 402. Through the telescopic push-pull action of the push-pull cylinder 404 on one side of the rail clamp 403, the ground tank 102 arranged on the reaction seat 101 carries the bridge segment 11 and continuously pushes the bridge segment 11 in the direction of the track 402;

[0070] S4, after the ground tank 102 at the bottom of the bridge segment 11 moves from the segment starting point on the surface of the reaction seat 101 to the segment end point, the jacking cylinder 201 on the jacking unit 2 jacks up the bridge segment 11 until the bridge segment 11 and the shoulder beam 103 on the ground tank 102 are emptied, and the ground tank 102 is moved back to the stage starting point position on the reaction seat 101;

[0071] S5, after the ground tank 102 is in place, the position of the shoulder beam 103 is readjusted on the ground tank 102, and then the jacking cylinder 201 is retracted to transfer the load of the bridge segment 11 to the ground tank 102;

[0072] S6. Repeat S3 to S5 until the bridge segment 11 is moved and constructed to the designed position.

[0073] The track push-pull unit 4 is arranged at approximately the middle position of the surface of the pier 10, the mobile support unit 1 is symmetrically arranged on both sides of the track push-pull unit 4, the posture adjustment unit 3 is arranged on one side of the mobile support unit 1 in the transverse direction of the bridge, and the jacking unit 2 is arranged on one side of the mobile support unit 1 in the longitudinal direction of the bridge. The reaction seat 101 includes a top plate 106 and a bottom plate 112, and a plurality of first reinforcement plates 104 and a plurality of second reinforcement plates 105 are arranged between the top plate 106 and the bottom plate 112. The first reinforcement plate 104, the second reinforcement plate 105, and the partition 115 are located between the top plate 106 and the bottom plate 112. With this structure, the mobile support unit 1 provides a supporting foundation for the bridge segment 11, and at the same time, the track push-pull unit 4 provides a stepping driving force for the bridge segment 11, so that the ground tank 102 on the reaction seat 101 continuously carries the bridge segment 11 for continuous advancement, and this step is repeated until the advancement process of the bridge segment 11 is completed.

[0074] In the preferred solution, during S3, when the bridge segment 11 deviates greatly from the designed position in the transverse direction of the bridge, the direction of the tank 102 is adjusted, and the side wall of the bridge segment 11 is adjusted by the adjustment cylinder 302 of the adjustment unit 3 until the position of the bridge segment 11 is adjusted to within the set range. With this structure, if there is a problem of eccentric load during the advancement process, the adjustment unit 3 can adjust the position of the bridge segment 11 to ensure that the overall travel route meets the design value and ensures safety.

[0075] In the preferred solution, the lifting cylinder 201 is lifted until the bridge segment 11 and the shoulder pole beam 103 on the ground tank 102 are emptied, and then the shoulder pole beam 103 between the two ground tanks 102 is removed, and then the ground tank 102 is rotated 90 degrees, and then the shoulder pole beam 103 is installed on the ground tank 102, and the lifting cylinder 201 is retracted to drop the bridge segment 11 onto the shoulder pole beam 103;

[0076] Then, the bridge segment 11 is lifted again with the lifting cylinder 201, and the ground tank 102 and the shoulder beam 103 are adjusted to the original direction, and S3 to S5 are continued after the beam is dropped. With this structure, the ground tank 102 on the reaction seat 101 can be quickly rotated, the construction efficiency is high, and the installation and disassembly are convenient. The bridge segment 11 can be quickly adjusted according to the designed direction and position, reducing the problem of construction restrictions caused by working condition restrictions during construction.

[0077] In the preferred solution, the installation steps of the mobile support unit 1, the lifting unit 2, the posture adjustment unit 3 and the track push-pull unit 4 are as follows:

[0078] A1. Check and clean the surface of the pier 10 to ensure that the installation surface is relatively flat;

[0079] A2. Install the bottom foundation 401 and the track 402 on the upper surface of the pier 10, ensure that the track 402 is in the correct direction, and then install the track clamp 403 and the push-pull cylinder 404;

[0080] A3. Place two reaction seats 101 on both sides of the track 402 respectively, and adjust the height of the top of the reaction seat 101 by the leveling unit 6 on the reaction seat 101 to ensure that the tops of the two reaction seats 101 are approximately in the same horizontal plane;

[0081] A4. Install alignment units 7 in the limiting surfaces on both sides of the track 402, connect the reaction seat 101 and the track 402 through the alignment units 7, and adjust the top positions of the two reaction seats 101 to be precisely level;

[0082] A5. Install the fixing plate 501, the first limiting support 502 and the second limiting support 503 in the limiting guide unit 5 on the upper part of the reaction seat 101 in sequence to ensure the accuracy of the position and direction;

[0083] A6. Place the ground tank 102 into the path constraint space formed between the first limit support 502, the second limit support 503 and the reaction seat 101, and then set up the shoulder beam 103 on the ground tank 102 on both sides;

[0084] A7, fix the base plate 202 to one side of the longitudinal bridge of the pier 10, and then install the jacking cylinder 201;

[0085] A8. Fix the adjusting bracket 301 to one side of the cross bridge of the pier 10, and then install the adjusting cylinder 302.

[0086] With this structure, the respective components can be installed at the designed positions according to the design requirements. Since the track 402 and the pier 10 are relatively fixed, and the track clamp 403 cannot withstand a large load perpendicular to its own moving direction, the direction of the track 402 is the reference for stepping. The reaction seat 101 can form a stable rigid connection with the track 402 using the alignment unit 7, ensuring that the mobile support unit 1 and the track 402 provide stable support for the bridge segment 11 and provide safety protection for subsequent stepping. The leveling unit 6 is threadedly connected to the reaction seat 101 through the second threaded hole 113, thereby ensuring that the height can be adjusted from the bottom of the reaction seat 101 to adapt to the slope slope change of the pier 10.

[0087] In a preferred solution, the installation steps of the alignment unit 7 are:

[0088] B1. According to the surface slope of the pier 10, firstly, the installation point of the reference block 701 is compared by comparing the length of the tension plate 704 and the position of the first locking rod 114;

[0089] B2, connecting the same side of the two tension plates 704 to the first locking rod 114 in the partition 115 respectively, and then installing the reference block 701 on the other side of the two tension plates 704;

[0090] B3. Adjust the position of the reference block 701 and fix it in the side groove of the track 402, while preventing the position of the reference block 701 from interfering with the movement of the track clamp 403;

[0091] B4. Fine-tune the position of the tension plate 704 and lock and fix both sides.

[0092] With this structure, the tension plates 704 limit the reaction seat 101. The two tension plates 704 can ensure that the axis of the reaction seat 101 and the travel direction of the track 402 are synchronized, the overall bearing capacity is stronger, and the overall installation and disassembly is convenient.

[0093] In the preferred solution, after the jacking unit 2 is installed, two distance measuring modules 9 are symmetrically installed on the top rod of the jacking oil cylinder 201 through the auxiliary plate 203 in the direction perpendicular to the surface of the pier column 10, and the working state of the distance measuring module 9 is debugged. The distance measuring module 9 includes a base 902, and a distance measuring sensor 901 is arranged in the middle position of the base 902. With this structure, the distance measuring module 9 can use the auxiliary plate 203 as the middle point to measure the distance to the surface of the pier column 10 and the ground of the bridge segment 11 in both sides. Since there is a height difference between different piers and the jacking oil cylinder 201 may have different usage states during use, the influence of the jacking oil cylinder 201 itself is avoided.

[0094] In a preferred solution, the installation steps of the limiting guide unit 5 are:

[0095] C1. Install the fixing plate 501 in sequence along the longitudinal direction of the bridge, align the alignment rod 504 at the bottom of the fixing plate 501 with the first through hole 111, align the limiting rod 506 with the mounting hole 109, and sleeve the first spring 511 on the alignment rod 504 and lock it with the nut 509;

[0096] C2. The first limiting support 502 is directly locked and fixed on the fixing plate 501 by a nut 509 on the side close to the starting point of the bridge segment, and then the fixing plate 501 is installed on the other fixing plates 501. The fixing plate 501 is limited by the first spring 511 and shrinks when subjected to a large force;

[0097] C3. Adjust the positions of the different second limiting supports 503 to ensure that the central axis between the second limiting supports 503 on both sides and the central axis of the two fixing plates 501 are coplanar;

[0098] C4. Check the telescopic stress state of each second limiting support 503 and ensure that the function is intact.

[0099] With this structure, the fixing plate 501 can be lifted until the limiting rod 506 is out of the mounting hole 109 and rotated to change the direction of the fixing plate 501, thereby changing the position of the second limiting support 503 and firmly fixing the second limiting support 503. The plurality of second limiting supports 503 cooperate with each other, thereby providing a stable walking path for the tank 102, and the installation and disassembly are convenient and reliable. In actual use, four grooves 110 are set in the mounting hole 109, and four protrusions 507 are set on the limiting rod 506, so that the overall limiting is more secure, and the first limiting support 502 is fixedly connected by the threaded rod 508 and the nut 509.

[0100] In the preferred solution, before the ground tank 102 is placed on the reaction seat 101, the correction unit 8 is first installed on the turntable 107 of the ground tank 102, and then the shoulder pole beam 103 is placed in the gap between the two push plates 806 on the correction unit 8, and the position of the push plate 806 is adjusted to ensure that the push plate 806 fits the outer side of the shoulder pole beam 103. The tank 102 is connected to the correction unit 8 through the first threaded hole 108 on the turntable 107. The correction unit 8 includes an adapter plate 808, in which a plurality of stepped holes 810 are arranged. The adapter plate 808 is connected to the turntable 107 through screws 809. A first ring plate 801 is arranged on the upper part of the adapter plate 808. A notch 804 is arranged on the first ring plate 801. Two second ring plates 802 are symmetrically arranged on the inner side of the first ring plate 801. The second ring plate 802 is connected to the first ring plate 801 through a partition plate 803. A sixth through hole 811 is arranged on the partition plate 803. A bent rod 805 is passed through the sixth through hole 811. A push plate 806 is arranged on the side of the bent rod 805 close to the notch 804. Both sides of the shoulder beam 103 are respectively attached to the outer side of the push plate 806. A second spring 807 is sleeved on the bent rod 805. The second spring 807 is used for unloading and buffering torque. With this structure, the correction unit 8 can bear the different positions caused by the possible asynchrony of the ground tank 102, and provide a limit for the shoulder beam 103 to prevent the shoulder beam 103 from sliding off the ground tank 102 and causing the bridge segment 11 to lose its supporting foundation and cause safety problems. In addition, since the position of the shoulder beam 103 changes due to the asynchrony of the ground tank 102, the shoulder beam 103 can be buffered and unloaded when it is subjected to torque.

[0101] In a preferred solution, the debugging steps of the ranging module 9 include:

[0102] D1. Obtain the height difference of different piers confirmed in the early stage of the survey by consulting the documents, and extract the difference Hz of different piers according to the current pier positions;

[0103] D2, turn on the two downward distance measuring modules 9 on different piers 10, obtain the distances H1 and H2 from the auxiliary plate 203 to the surface of each pier 10, and obtain the difference between the two, which is the lifting height difference δHd between the lifting cylinders 201 in the initial state;

[0104] D3, turn on the two upward distance measurement modules 9 on different piers 10, obtain the distances H3 and H4 between the auxiliary plate 203 and the bottom surface of the bridge segment 11, and obtain the difference between the two, which is recorded as δHm;

[0105] D4. Calculate the difference between the sum of δHd and δHm in the initial state and Hz, and take the average value after multiple measurements. Since the height difference of the pier height is confirmed at the beginning of the bridge survey, the height difference will directly affect the line shape of the bridge. With this structure, the height difference can be accurately obtained. Under the premise of a certain height difference, in order to ensure that the top surface of the bridge segment 11 is horizontal, whether the top surface of the bridge segment 11 is horizontal at any time is an important factor affecting whether there is eccentric load, so there is the following formula:

[0106] L1+L3=L2+L4+Hz;①

[0107] L1-L2=δHd;②

[0108] L3-L4=δHm; ③

[0109] By transforming the above formula, we can get: δHd+δHm=Hz; ④

[0110] That is, when the lifting cylinder 201 is working, the lifting cylinders 201 of different pier heights need to satisfy the above formula ④ to avoid the generation of eccentric load. The numerical value obtained by electronic distance measurement is more accurate, more efficient and more effective. It can judge whether each lifting cylinder 201 is working normally according to the changing trends of δHd and δHm. Under the theoretical state, the changing trends of δHd and δHm are just linearly opposite, so it can provide direct guidance for the overall step decision.

[0111] In the preferred solution, during the D4 process, when the difference is within the allowable range, the subsequent stepping process is performed. If the difference is beyond the allowable range, the position and state of the bridge segment 11 are adjusted until the difference is within the allowable range. At the same time, during the jacking process, the moments δHd and δHm are ensured to be relatively stable. With this structure, during the advancement of the bridge segment 11, since the distance between the reaction seat 101 and the track 402 is limited during the S3-S5 process, the jacking cylinder 201 serves as a temporary support to coordinate the overall guarantee of the jacking and placement of the bridge segment 11, and only changes in the height direction, thereby ensuring the overall position accuracy, high stepping efficiency, reducing the process and steps of the correction adjustment, and making the overall advancement safer and the construction efficiency higher.

[0112] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A step-by-step bridge sliding construction process, characterized in that: The following steps are involved: S1. First, the top of the pier column (10) is cleaned, and then the mobile support unit (1), the lifting unit (2), the posture adjustment unit (3) and the track push-pull unit (4) are respectively installed; S2, hoisting the assembled bridge segment (11) onto the shoulder beam (103) of the mobile support unit (1); S3. A rail clamp (403) is used at the rear of the bridge segment (11) to establish a connection between the bridge segment (11) and the track (402). Through the telescopic push-pull action of the push-pull cylinder (404) on one side of the rail clamp (403), a ground tank (102) arranged on the reaction seat (101) carries the bridge segment (11) and continuously pushes the bridge segment (11) along the direction of the track (402); S4, after the ground tank (102) located at the bottom of the bridge segment (11) moves from the segment starting point on the surface of the reaction seat (101) to the segment end point, the lifting cylinder (201) on the lifting unit (2) lifts the bridge segment (11) until the bridge segment (11) and the shoulder beam (103) on the ground tank (102) are emptied, and the ground tank (102) is moved back to the stage starting point position on the reaction seat (101); S5, after the ground tank (102) is in place, the position of the shoulder beam (103) is readjusted on the ground tank (102), and then the jacking cylinder (201) is retracted to transfer the load of the bridge segment (11) to the ground tank (102); S6, repeat S3 to S5 until the bridge segment (11) is moved to the designed position; The steps for installing the mobile support unit (1), the lifting unit (2), the posture adjustment unit (3) and the track push-pull unit (4) are as follows: A1. Check and clean the surface of the pier (10) to ensure that the installation surface is relatively flat; A2. Install the bottom foundation (401) and the track (402) on the upper surface of the pier (10), ensure that the track (402) is aligned accurately, and then install the track clamp (403) and the push-pull cylinder (404); A3. Place two reaction seats (101) on both sides of the track (402) respectively, and adjust the height of the top of the reaction seat (101) by using the leveling unit (6) on the reaction seat (101) to ensure that the tops of the two reaction seats (101) are approximately in the same horizontal plane; A4. Alignment units (7) are respectively installed in the limiting surfaces on both sides of the track (402), and the reaction seats (101) and the track (402) are connected through the alignment units (7), and the top positions of the two reaction seats (101) are adjusted to be precisely level; A5. Install the fixing plate (501), the first limiting support (502) and the second limiting support (503) in the limiting guide unit (5) on the upper part of the reaction seat (101) in sequence to ensure the accuracy of the position and direction; A6. Place the tank (102) in the path constraint space formed between the first limit support (502), the second limit support (503) and the reaction seat (101), and then place the shoulder pole beam (103) on the tank (102) on both sides; A7. Fix the base plate (202) to one side of the longitudinal bridge of the pier column (10), and then install the jacking cylinder (201); A8. Fix the adjusting bracket (301) to one side of the cross bridge of the pier column (10), and then install the adjusting cylinder (302); The installation steps of the alignment unit (7) are as follows: B1. According to the surface slope of the pier column (10), firstly, the installation point of the reference block (701) is compared by comparing the length of the tension plate (704) and the position of the first locking rod (114); B2. Connect the same side of the two tension plates (704) to the first locking rod (114) in the partition (115) respectively, and then install the reference block (701) on the other side of the two tension plates (704); B3, adjusting the position of the reference block (701) and fixing it in the side groove of the track (402), while preventing the position of the reference block (701) from interfering with the movement of the track clamp (403); B4. Fine-tune the position of the tension plate (704) and lock and fix both sides respectively; Before the ground tank (102) is placed on the reaction seat (101), the correction unit (8) is first installed on the turntable (107) of the ground tank (102), and then the shoulder pole beam (103) is placed in the gap between the two push plates (806) on the correction unit (8), and the position of the push plate (806) is adjusted to ensure that the push plate (806) is attached to the outer side of the shoulder pole beam (103); The ground tank (102) is connected to the deviation correction unit (8) via a first threaded hole (108) on a rotating disk (107). The deviation correction unit (8) includes an adapter disk (808). A plurality of stepped holes (810) are provided in the adapter disk (808). The adapter disk (808) is connected to the rotating disk (107) via screws (809). A first ring plate (801) is provided on the upper portion of the adapter disk (808). The first ring plate (801) is provided with a notch (804), two second ring plates (802) are symmetrically provided on the inner side of the first ring plate (801), the second ring plate (802) is connected to the first ring plate (801) via a partition plate (803), a sixth through hole (811) is provided on the partition plate (803), a curved rod (805) is inserted into the sixth through hole (811), a push plate (806) is provided on the side of the curved rod (805) close to the notch (804), two sides of the shoulder beam (103) are respectively attached to the outer side of the push plate (806), a second spring (807) is sleeved on the curved rod (805), and the second spring (807) is used for unloading and buffering torque.

2. According to claim 1, a step-by-step bridge sliding construction process is characterized by: In the process of S3, when the bridge segment (11) deviates greatly from the designed position in the transverse direction of the bridge, the direction of the ground tank (102) is adjusted, and the side wall of the bridge segment (11) is adjusted by the adjustment cylinder (302) of the attitude adjustment unit (3) until the position of the bridge segment (11) is adjusted to within the set range.

3. According to claim 1, a step-by-step bridge sliding construction process is characterized by: The lifting cylinder (201) is lifted until the bridge segment (11) and the shoulder pole beam (103) on the ground tank (102) are emptied, and then the shoulder pole beam (103) between the two ground tanks (102) is removed, and then the ground tank (102) is rotated 90 degrees, and the shoulder pole beam (103) is then installed on the ground tank (102), and the lifting cylinder (201) is retracted to make the bridge segment (11) fall onto the shoulder pole beam (103); Then, the bridge segment (11) is lifted again by the lifting cylinder (201), and the ground tank (102) and the shoulder beam (103) are adjusted to the original direction. After the beam is lowered, S3 to S5 are continued.

4. According to claim 1, a step-by-step bridge sliding construction process is characterized by: After the jacking unit (2) is installed, two distance measuring modules (9) are symmetrically installed on the jacking rod of the jacking cylinder (201) through the auxiliary plate (203) in a direction perpendicular to the surface of the pier column (10), and the working state of the distance measuring modules (9) is debugged.

5. According to claim 1, a step-by-step bridge sliding construction process is characterized by: The installation steps of the limit guide unit (5) are as follows: C1. Install the fixing plate (501) in sequence along the longitudinal direction of the bridge, align the alignment rod (504) at the bottom of the fixing plate (501) with the first through hole (111), align the limiting rod (506) with the mounting hole (109), and sleeve a first spring (511) on the alignment rod (504) and lock it with a nut (509); C2. The first limiting support (502) is directly locked and fixed on the fixing plate (501) by a nut (509) on the side close to the starting point of the bridge segment, and then the fixing plate (501) is installed on the remaining fixing plates (501). The fixing plate (501) is limited by the first spring (511) and contracts when subjected to a large force; C3. Adjust the positions of the different second limiting supports (503) to ensure that the central axis between the second limiting supports (503) on both sides and the central axis of the two fixing plates (501) are coplanar; C4. Check the telescopic stress state of each second limit support (503) and ensure that the function is intact.

6. According to claim 4, a step-by-step bridge sliding construction process is characterized by: The debugging steps of the ranging module (9) include: D1. Obtain the height difference of different piers confirmed in the early stage of the survey by consulting the documents, and extract the difference Hz of different piers according to the current pier positions; D2, turning on the two downward distance measuring modules (9) on different piers (10), obtaining the distances H1 and H2 from the auxiliary plate (203) to the surface of each pier (10), and obtaining the difference between the distances H1 and H2, which is the lifting height difference δHd between the lifting cylinders (201) in the initial state; D3, turning on two upward distance measurement modules (9) on different piers (10), obtaining the distances H3 and H4 between the auxiliary plate (203) and the bottom surface of the bridge segment (11), and obtaining the difference between the two, recorded as δHm; D4. Calculate the difference between the sum of δHd and δHm in the initial state and Hz, and take the average value after multiple measurements.

7. According to claim 6, a step-by-step bridge sliding construction process is characterized in that: During the D4 process, when the difference is within the allowable range, the subsequent stepping process is carried out. If it exceeds the tolerance, the position and state of the bridge segment (11) are adjusted until the difference is within the allowable range. At the same time, during the jacking process, it is ensured that the moments δHd and δHm are relatively stable.

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