High pier segmented climbing form construction and linear control method

Abstract

This application relates to the field of bridge technology and discloses a method for segmented climbing formwork construction and alignment control of high piers. The method first completes the construction of the first pier segment based on preset pier alignment control benchmarks and alignment deviation thresholds, determining the initial benchmark for pier construction. Then, based on the initial benchmark, the climbing formwork frame is assembled in stages to determine the climbing formwork installation benchmark. Subsequently, standard segment cyclic construction is carried out based on the climbing formwork installation benchmark, with each construction procedure accompanied by corresponding alignment control actions. Finally, the capping section construction is completed, obtaining the overall pier alignment control result. This application can effectively suppress the accumulation of alignment deviations and stably ensure the alignment accuracy of completed high piers.

Description

Technical Field

[0001] This application relates to the field of bridge technology, specifically to a method for high-pier segmented climbing formwork construction and alignment control. Background Technology

[0002] As my country's transportation infrastructure construction extends into complex mountainous and deep canyon areas, the application scale of high-pier structures for long-span bridges continues to expand. Segmented climbing formwork construction, due to its high construction efficiency, good operational safety, and stable structural quality, has become the mainstream technical solution for high-pier construction. However, in the application of existing technologies, the segmented climbing formwork construction process for high piers is prone to problems such as the accumulating deviation in pier alignment with increasing construction height, the difficulty in correcting deviations, and the inability to consistently guarantee the accuracy of the pier alignment. This not only affects the overall load-bearing performance of the high-pier structure and the operational quality of the completed bridge but also easily leads to rework and construction delays, making it difficult to meet the high-quality construction requirements of high-pier construction under complex conditions. Summary of the Invention

[0003] To solve, or at least partially solve, the above-mentioned technical problems, this application provides a method for high-pier segmented climbing formwork construction and alignment control.

[0004] This application provides a method for segmented climbing formwork construction and alignment control of high piers, including the following steps:

[0005] S1. Based on the preset pier body alignment measurement and control benchmark and alignment deviation threshold, complete the pre-control of the installation accuracy of the first segment pier body formwork, pour the first segment pier body concrete and monitor the deformation and displacement of the formwork simultaneously, and re-measure the alignment of the first segment pier body after pouring to determine the initial benchmark for pier body construction.

[0006] S2. Based on the initial benchmark for pier construction, the climbing formwork is assembled in stages. After each stage of assembly is completed, the accuracy of the formwork alignment is checked simultaneously. Once the accuracy meets the alignment deviation threshold requirement, the next stage of assembly is started. After all the assembly is completed, the climbing formwork installation benchmark is determined.

[0007] S3. Based on the climbing formwork installation benchmark, standard segment cyclic construction is carried out. Within each cyclic segment, the pier body alignment of the previous segment is re-measured and the pre-correction parameters of this segment are determined. Then, the climbing formwork removal and pre-climbing accuracy verification, climbing formwork climbing process monitoring, accuracy locking and pre-correction adjustment after climbing to the position, final accuracy inspection before formwork closure, and concrete pouring process monitoring are completed in sequence. Finally, the pier body alignment of this segment is re-measured and the pre-correction parameters of the next segment are output.

[0008] S4. Before the construction of the capping section, the full height alignment of the pier body is re-measured. Based on the re-measurement results, the installation accuracy of the capping section template is adjusted. After the pouring is completed, the alignment control results of the entire pier body are obtained.

[0009] Optionally, the process of standard segment cyclic construction also includes special segment construction, specifically including:

[0010] When carrying out special segment construction, the current pier body alignment measurement and control benchmark is first re-measured and determined. During the climbing formwork modification process, the stability of the frame benchmark is monitored simultaneously. After the construction is completed, the pier body alignment is re-measured and the climbing formwork installation benchmark is reset, and the standard segment cyclic construction is resumed.

[0011] Optionally, the linear deviation threshold corresponds to each process node of the first segment pier construction, climbing formwork assembly, standard segment cyclic construction, and capping segment construction, and a matching deviation control level is set for each.

[0012] Before each process node is constructed, it is first confirmed that the corresponding line type accuracy meets the deviation control level requirements of that node. When the line type accuracy exceeds the corresponding deviation control level, the current process is suspended, and a correction operation is performed. Construction is resumed after the correction is completed and the retest is qualified.

[0013] Optionally, during the standard segment cyclic construction process, the method further includes:

[0014] After each preset number of standard segments are constructed, the current climbing formwork installation benchmark and the pier alignment benchmark are fully calibrated based on the fixed measurement and control benchmark of the site. The calibrated benchmarks are used as the benchmarks for subsequent construction.

[0015] Optionally, during the standard segment cyclic construction process, the method further includes:

[0016] Based on the previous segment's pier alignment re-measurement results and the aforementioned pre-correction parameters, the hydraulic cylinder synchronous action parameters and frame posture pre-adjustment values ​​for the current climbing formwork are matched in advance. During the climbing formwork process, the frame posture is adjusted in real time according to the pre-adjustment values, and the alignment pre-control is completed after the climbing formwork reaches the desired position.

[0017] Optionally, during the standard segment cyclic construction process, the method further includes:

[0018] Before pouring concrete, based on the pre-correction parameters and the stress characteristics of the formwork in this section, the symmetrical pouring sequence, layer pouring parameters, and pouring speed control requirements of the concrete are set in advance, and the pouring operation is completed accordingly to offset the risk of formwork deviation caused by the pouring load.

[0019] Optionally, during the process of assembling the climbing formwork in stages, the method further includes:

[0020] Centered on the initial benchmark for pier construction, a symmetrical and synchronous assembly sequence is adopted. During the assembly process, temporary limiting structures are set up simultaneously, and the assembly posture of each frame is controlled according to the preset pre-adjustment values ​​to avoid the accumulation of asymmetrical deviations during the assembly process.

[0021] Optionally, when performing construction on special segments, the method further includes:

[0022] Before the climbing formwork is modified, a permanent reference transfer point is set on the already poured pier to cross the modification process. During the climbing formwork modification process, the permanent reference transfer point is protected and preserved. When the climbing formwork is reset, the permanent reference transfer point is used as the basis to complete the reset and calibration of the climbing formwork installation reference.

[0023] Optionally, before proceeding with the standard segment cyclic construction up to the capping segment construction, the method further includes:

[0024] Based on the cumulative alignment deviation of the pier's total height, progressive correction amounts are set for the corresponding segments in the last few standard segments before the capping section is constructed. Through progressive adjustments across multiple segments, the total height deviation is converged, and finally, alignment compliance is achieved in the capping section.

[0025] Optionally, in the case of asynchronous construction of multiple piers, the method further includes:

[0026] All piers share the same set of fixed measurement and control benchmarks for the site. The alignment re-measurement nodes of each pier are kept synchronized in time. The relative alignment deviations of adjacent piers are controlled synchronously, and the pre-correction parameters of the corresponding piers are adjusted synchronously based on the relative deviations.

[0027] The method provided in this application has the following beneficial effects:

[0028] This application achieves simultaneous alignment monitoring and initial benchmark determination during the construction of the first pier segment, ensuring that alignment control for high pier construction corresponds to the construction operations from the very beginning, thus avoiding subsequent systematic errors caused by initial benchmark deviations. By simultaneously verifying the alignment accuracy of each level of the climbing formwork during its phased assembly, the installation accuracy of the climbing formwork system remains consistent with the pier construction benchmark, providing a stable accuracy foundation for subsequent segment construction. Through cyclical construction of standard segments, alignment re-measurement and pre-correction parameter determination are sequentially correlated with each step of the climbing formwork construction process, ensuring that each construction operation has a corresponding alignment control action. This avoids the problem of disconnect between construction operations and alignment control, reduces the accumulation of pier alignment deviations as construction height increases, effectively improves the alignment accuracy of the completed high pier, ensures the structural performance of the high pier, reduces rework caused by excessive alignment deviations, and improves construction efficiency. By re-measuring the full-height alignment and adjusting the precision of the formwork before the capping section construction, a complete correspondence was formed for the alignment control of the high pier throughout the entire construction cycle, ensuring the compliance of the overall alignment of the pier body.

[0029] Furthermore, this application covers the operational scenarios of non-standard segments in high pier construction through corresponding control steps for special segment construction, avoiding interruptions in alignment control under special working conditions and ensuring stable alignment accuracy throughout the entire construction process. By setting matching deviation control levels for different process nodes, the alignment control requirements are adapted to the operational characteristics of each construction process, improving the rationality and effectiveness of control actions. Through benchmark closure calibration after multi-segment construction, pre-matching of action parameters before climbing formwork, preset pouring parameters before concrete pouring, and corresponding settings for symmetrical synchronous assembly of the frame, alignment deviations are reduced from the source of construction operations, lowering the difficulty of subsequent correction operations. By setting permanent benchmark transfer points in special segment construction, progressive correction of multiple segments before capping, and synchronous control settings for asynchronous construction of multiple piers, the application further adapts to different construction conditions, expands the scope of application of this solution, and further improves the stability of alignment accuracy in high pier construction. Attached Figure Description

[0030] Figure 1 This application provides a schematic flowchart of a high-pier segmented climbing formwork construction and alignment control method.

[0031] Figure 2 This is a schematic diagram of a high pier construction scenario provided in an embodiment of this application. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this application clearer, specific embodiments of this application will be described in further detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely for explaining this application and not for limiting it. It should also be noted that, for ease of description, only the parts relevant to this application are shown in the drawings, not all of them. Before discussing exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe operations (or steps) as sequential processes, many of these operations can be performed in parallel, concurrently, or simultaneously. Furthermore, the order of the operations can be rearranged. The process can be terminated when its operation is completed, but may also have additional steps not included in the drawings. The process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0033] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0034] See Figure 1This application provides a method for segmented climbing formwork construction and alignment control of high piers, including the following steps:

[0035] S1. Based on the preset pier body alignment measurement and control benchmark and alignment deviation threshold, complete the pre-control of the installation accuracy of the first segment pier body formwork, pour the first segment pier body concrete and monitor the deformation and displacement of the formwork simultaneously, and re-measure the alignment of the first segment pier body after pouring to determine the initial benchmark for pier body construction.

[0036] S2. Based on the initial benchmark for pier construction, the climbing formwork is assembled in stages. After each stage of assembly is completed, the accuracy of the formwork alignment is checked simultaneously. Once the accuracy meets the alignment deviation threshold requirement, the next stage of assembly is started. After all the assembly is completed, the climbing formwork installation benchmark is determined.

[0037] S3. Based on the climbing formwork installation benchmark, standard segment cyclic construction is carried out. Within each cyclic segment, the pier body alignment of the previous segment is re-measured and the pre-correction parameters of this segment are determined. Then, the climbing formwork removal and pre-climbing accuracy verification, climbing formwork climbing process monitoring, accuracy locking and pre-correction adjustment after climbing to the position, final accuracy inspection before formwork closure, and concrete pouring process monitoring are completed in sequence. Finally, the pier body alignment of this segment is re-measured and the pre-correction parameters of the next segment are output.

[0038] S4. Before the construction of the capping section, the full height alignment of the pier body is re-measured. Based on the re-measurement results, the installation accuracy of the capping section template is adjusted. After the pouring is completed, the alignment control results of the entire pier body are obtained.

[0039] Specifically, before commencing construction, this plan pre-sets the pier alignment control benchmark and alignment deviation threshold. Based on these, the formwork installation for the first pier segment is carried out. During the installation process, precision pre-control is performed to ensure that all indicators of the formwork installation meet the preset requirements. Subsequently, the concrete pouring for the first pier segment is carried out. During the pouring process, the deformation and displacement of the formwork are continuously monitored to promptly confirm the changes in the formwork's state under the pouring load. After the concrete pouring is completed and reaches the corresponding strength requirements, the actual alignment of the first pier segment is re-measured. Based on the re-measurement results, the initial benchmark for pier construction is determined, providing a foundation for all subsequent construction operations.

[0040] After determining the initial benchmark for pier construction, the climbing formwork is assembled in stages based on this benchmark. The assembly work is carried out in stages, and the alignment accuracy of each stage of the formwork is checked simultaneously after the completion of each stage. Only after confirming that the check result meets the preset alignment deviation threshold requirements can the assembly work of the next stage of the formwork be carried out. After all the formwork is assembled, the climbing formwork installation benchmark is determined by combining the accuracy check data of the entire assembly process, so as to provide a stable control basis for subsequent segmental cyclic construction operations.

[0041] After determining the installation benchmark for the climbing formwork, the standard segment construction is carried out cyclically based on this benchmark. During the construction of each cyclic segment, the alignment of the previously completed pier segment is first re-measured. Based on the re-measurement results, the pre-correction parameters corresponding to the construction of this segment are determined. Then, the climbing formwork removal operation and the accuracy check before climbing are carried out sequentially. After confirming that the climbing formwork equipment meets the construction requirements, the climbing formwork climbing operation is started. During the climbing process, the operation status of the climbing formwork is continuously monitored. After the climbing formwork is climbed to the correct position, the accuracy of the climbing formwork is locked first, and then the corresponding adjustments are made based on the pre-determined pre-correction parameters. After the adjustment is completed, the accuracy check before closing the formwork is carried out. After confirming that all indicators meet the requirements, the formwork closing operation is completed, followed by concrete pouring. During the pouring process, the construction status is continuously monitored. After the concrete pouring of this segment is completed, the alignment of the pier segment is re-measured. Based on the re-measurement results, the pre-correction parameters corresponding to the construction of the next segment are output. This completes a complete cyclic operation process, and subsequent segments are carried out in the same cyclical manner.

[0042] Before commencing construction on the capping section after completing all standard segment construction, the overall height alignment of the completed pier is re-measured. Based on the re-measurement results, targeted adjustments are made to the formwork installation accuracy of the capping section to ensure that the formwork installation meets the requirements for overall pier alignment control. After adjustments are made, concrete pouring for the capping section is carried out. Once all pouring is completed, the alignment control results for the entire pier are obtained, thus completing the construction of the entire high pier. Figure 2 The figure shown is a schematic diagram of a high pier construction scenario provided in an embodiment of this application. The figure shows the first segment 100, the climbing formwork 200, the standard segment 300, and the capping segment 400.

[0043] Through the above construction process, this solution integrates alignment control into every operational stage of the high pier climbing formwork construction. Pre-control of accuracy is completed before each construction action, full monitoring is implemented during construction, and corresponding re-measurements are conducted after completion. This avoids the problem of alignment control being disconnected from the construction process, reduces the accumulation of alignment deviations during construction, improves the stability of alignment control in high pier construction, ensures the overall construction quality of the high pier structure, and also avoids rework due to excessive deviations in the later stages, thereby improving the overall efficiency of construction operations.

[0044] In some implementations, the process of standard segment cyclic construction also includes special segment construction, specifically including:

[0045] When carrying out special segment construction, the current pier body alignment measurement and control benchmark is first re-measured and determined. During the climbing formwork modification process, the stability of the frame benchmark is monitored simultaneously. After the construction is completed, the pier body alignment is re-measured and the climbing formwork installation benchmark is reset, and the standard segment cyclic construction is resumed.

[0046] Specifically, during the process of standard segment cyclic construction, when encountering situations where special segments need to be set up, the corresponding special segment construction operations are carried out simultaneously on the basis of the original standard segment construction operation process.

[0047] Before commencing construction on special segments, the alignment of the completed pier structure is re-measured. Based on the re-measurement results, the pier alignment control benchmark under the current working conditions is determined, and this benchmark is used as the control basis for the entire construction process of special segments.

[0048] Based on the structural design and construction requirements of special sections, the climbing formwork and its supporting templates are modified accordingly. During the modification process, the baseline stability of the climbing formwork is continuously monitored to monitor the status changes of the formwork during the modification operation, so as to avoid unnecessary disturbance to the established control baseline.

[0049] After all construction work on the special segment is completed, the pier body alignment of the special segment is re-measured. Based on the re-measurement results, the climbing formwork installation benchmark is reset to the corresponding control state before the construction of the special segment. After confirming that the accuracy of the climbing formwork and supporting templates meets the relevant requirements for standard segment construction, the original standard segment cyclic construction operation process is restored, and the construction work of subsequent pier body segments continues.

[0050] Through the above-mentioned work process, the continuity of alignment control can be maintained throughout the construction of special segments, avoiding damage to the control benchmark of the original standard segment construction caused by the construction of special segments, ensuring smooth alignment connection between special segments and adjacent standard segments, and enabling the smooth resumption of the cyclical construction of standard segments after the completion of special segment construction, without adversely affecting the overall construction progress rhythm, and ensuring the stability of alignment control effect of the entire pier construction.

[0051] In some implementations, the linear deviation threshold corresponds to each process node of the first segment pier construction, climbing formwork assembly, standard segment cyclic construction, and capping segment construction, and a matching deviation control level is set for each.

[0052] Before each process node is constructed, it is first confirmed that the corresponding line type accuracy meets the deviation control level requirements of that node. When the line type accuracy exceeds the corresponding deviation control level, the current process is suspended, and a correction operation is performed. Construction is resumed after the correction is completed and the retest is qualified.

[0053] During the segmented climbing formwork construction of high piers, for each process node including the construction of the first pier segment, the assembly of the climbing formwork frame, the cyclical construction of standard segments, and the construction of the capping segment, a deviation control level matching the pre-set alignment deviation threshold can be set for each corresponding process node. The deviation control level corresponding to different process nodes is matched and set in combination with the operational characteristics of the corresponding process and the degree of impact on subsequent construction. Each key construction process node has a corresponding and suitable alignment accuracy control standard.

[0054] Before the formal commencement of construction work at each process node, a comprehensive check of the line type accuracy corresponding to the current operation is conducted. Only after confirming that the current line type accuracy meets the deviation control level requirements corresponding to the process node can the construction work of that process be formally started. This ensures that each step of the construction work is started within the preset accuracy control range, controlling the generation of line type deviation from the start of the operation.

[0055] During the accuracy verification process, if the current line type accuracy is found to exceed the deviation control level corresponding to the process node, the currently scheduled process operation is paused, and corresponding corrective operations are performed simultaneously based on the current deviation. After all corrective operations are completed, the corrected line type accuracy is retested. Once the retest results are confirmed to meet the deviation control level requirements for the process node, the construction operation for that process can be resumed.

[0056] Through the above-mentioned hierarchical control method, this solution can match appropriate precision control requirements for each key process node in the entire process of high pier climbing formwork construction, avoiding the problem that a single control standard cannot adapt to the characteristics of different process operations. At the same time, precision verification and deviation handling are completed before the start of each process, preventing deviations from expanding as construction progresses, ensuring the accuracy and stability of the entire process alignment control, and avoiding rework problems caused by handling deviations after subsequent processes are completed.

[0057] In some embodiments, during the standard segment cyclic construction process, the method further includes:

[0058] After each preset number of standard segments are constructed, the current climbing formwork installation benchmark and the pier alignment benchmark are fully calibrated based on the fixed measurement and control benchmark of the site. The calibrated benchmarks are used as the benchmarks for subsequent construction.

[0059] During the continuous advancement of standard segment cyclic construction, the construction benchmarks can be periodically calibrated according to the preset intervals for the number of segments. Specifically, after the completion of each corresponding number of standard segments, the fixed measurement and control benchmarks within the site area are used as the calibration basis to perform a full closed-loop calibration of the climbing formwork installation benchmarks and pier alignment measurement and control benchmarks used in the current construction. The calibration process comprehensively covers all control parameters of the benchmarks, ensuring that the calibration results are consistent with the control requirements of the fixed measurement and control benchmarks in the site area.

[0060] After all calibration operations are completed, the calibrated climbing formwork installation benchmark and pier alignment control benchmark will be used as the control basis for subsequent standard segment cyclic construction. All subsequent construction operations, such as climbing formwork lifting, formwork adjustment, and alignment re-measurement, will be carried out based on the benchmark updated in this calibration.

[0061] This regular calibration method effectively eliminates the reference transfer deviation that occurs as the pier construction height increases, prevents the construction reference from shifting as the segments continue to advance, ensures that the alignment control basis for each subsequent segment remains stable and reliable, reduces the accumulation of alignment errors caused by reference deviation, keeps the alignment control of the entire pier in a continuous and consistent state, and improves the overall alignment control effect of the construction.

[0062] In some embodiments, during the standard segment cyclic construction process, the method further includes:

[0063] Based on the previous segment's pier alignment re-measurement results and the aforementioned pre-correction parameters, the hydraulic cylinder synchronous action parameters and frame posture pre-adjustment values ​​for the current climbing formwork are matched in advance. During the climbing formwork process, the frame posture is adjusted in real time according to the pre-adjustment values, and the alignment pre-control is completed after the climbing formwork reaches the desired position.

[0064] During the standard segment cyclic construction process, before carrying out the climbing formwork climbing operation, the results obtained from the re-measurement of the pier body alignment of the previous segment and the determined pre-correction parameters can be used as a basis to match the synchronous action parameters of the hydraulic cylinder required for climbing formwork climbing in advance, and at the same time determine the pre-adjustment value of the frame posture so that the relevant parameters are adapted to the alignment control requirements of this segment.

[0065] Once the climbing formwork officially begins its climbing operation, the posture of the climbing formwork is adjusted in real time according to the pre-determined posture adjustment values ​​throughout the climbing process to ensure that the formwork always meets the alignment control requirements. After the climbing formwork reaches its position, the alignment pre-control of this segment of the pier construction is completed directly, without the need for additional posture correction operations.

[0066] By using this method of pre-matching parameters and adjusting posture in real time, the alignment pre-control is integrated into the climbing formwork process, avoiding alignment deviations caused by post-climb posture adjustments, reducing sudden changes in pier alignment, and ensuring a smooth transition between climbing formwork construction and alignment control, thereby improving the accuracy and efficiency of alignment control in standard segment construction.

[0067] In some embodiments, during the standard segment cyclic construction process, the method further includes:

[0068] Before pouring concrete, based on the pre-correction parameters and the stress characteristics of the formwork in this section, the symmetrical pouring sequence, layer pouring parameters, and pouring speed control requirements of the concrete are set in advance, and the pouring operation is completed accordingly to offset the risk of formwork deviation caused by the pouring load.

[0069] During the standard segment cyclic construction process, after the climbing formwork has reached its designated position and undergone precision locking and pre-correction adjustments, and the final precision inspection before formwork closure is passed, the concrete pouring operation begins. Before the formal commencement of concrete pouring, it is necessary to set the relevant pouring parameters in advance, taking into full account the pre-correction parameters already determined for this segment and the stress characteristics of the formwork. This ensures that the pouring operation can effectively offset the risk of formwork misalignment caused by the load, thus guaranteeing the control of the pier alignment for this segment.

[0070] Specifically, based on the pre-correction parameters of this segment, the weak points and stress distribution of the formwork in its current posture are identified. A symmetrical concrete pouring sequence is then established based on these stress characteristics. This ensures that concrete is poured symmetrically from both sides of the formwork and from areas with balanced stress, preventing uneven loads from unilateral pouring that could cause formwork misalignment and ensuring the formwork maintains its preset precision posture. Simultaneously, considering the formwork's load-bearing capacity, stiffness, and other stress characteristics, reasonable layered pouring parameters are set, specifying the thickness and interval of each concrete layer. This prevents excessively thick single pours from causing excessive loads on the formwork, leading to deformation or misalignment, and also prevents overly fine layers from affecting construction efficiency. Furthermore, appropriate pouring speed control requirements are set based on the formwork's stress conditions and the concrete's fluidity. This prevents excessively fast pouring speeds from causing excessive concrete impact and disrupting the formwork's stability, and also prevents excessively slow pouring speeds from causing concrete segregation, indirectly affecting the formwork's stress balance. This ensures that the formwork's stress remains within a controllable range throughout the pouring process.

[0071] After all pouring parameters are set, concrete pouring is carried out according to the preset symmetrical pouring sequence, layered pouring parameters and pouring speed control requirements. During the pouring process, the stress state and displacement of the formwork are observed simultaneously.

[0072] By pre-setting pouring parameters and standardizing the pouring process, the risk of formwork misalignment caused by concrete pouring loads can be mitigated, reducing deviations in pier alignment due to formwork misalignment. This ensures the stability and precision of the formwork during concrete pouring, thereby improving the alignment control quality of standard pier segments. Simultaneously, it avoids rework and rectification caused by formwork misalignment, ensuring smooth construction progress, improving overall construction efficiency, and ensuring that the alignment of each pier segment meets the preset control requirements.

[0073] In some embodiments, during the process of assembling the climbing formwork in stages, the method further includes:

[0074] Centered on the initial benchmark for pier construction, a symmetrical and synchronous assembly sequence is adopted. During the assembly process, temporary limiting structures are set up simultaneously, and the assembly posture of each frame is controlled according to the preset pre-adjustment values ​​to avoid the accumulation of asymmetrical deviations during the assembly process.

[0075] During the phased assembly of the climbing formwork, the initial benchmark determined in the early stages of pier construction was used as a reference. The assembly operation of the climbing formwork was carried out around this benchmark, and a symmetrical and synchronous assembly sequence was adopted to ensure that the assembly progress and posture of corresponding parts of the formwork remained consistent. The assembly operation was carried out according to the requirement of tiered advancement. Before the assembly of each stage of the formwork was started, the assembly positioning direction was determined based on the initial benchmark, and then the assembly operation was carried out synchronously from symmetrical positions to avoid uneven stress and positional deviation caused by unilateral assembly.

[0076] Temporary limiting structures are set up simultaneously during assembly to initially fix and constrain the assembly position of the frame, preventing accidental displacement of the frame during assembly. At the same time, the assembly posture of each level of the frame is monitored in real time according to preset values, adjusting aspects such as the frame's horizontality, verticality, and position relative to the reference point to ensure that each level of the frame meets the preset posture requirements after assembly.

[0077] After each level of frame assembly is completed, the frame alignment accuracy is checked in conjunction with the constraint effect of the temporary limiting structure and the control standard of the pre-adjusted values. Only after confirming that the posture meets the requirements can the assembly of the next level of frame be carried out.

[0078] By using this symmetrical synchronous assembly method, combined with temporary limiters and preset numerical attitude control, asymmetrical deviations caused by uneven work sequence and inaccurate positioning during the assembly process can be effectively avoided. This prevents deviations from accumulating gradually during multi-stage assembly, ensuring that the overall assembly accuracy of the climbing formwork meets construction requirements and reducing subsequent construction alignment problems caused by frame assembly deviations.

[0079] In some embodiments, when performing construction on special segments, the method further includes:

[0080] Before the climbing formwork is modified, a permanent reference transfer point is set on the already poured pier to cross the modification process. During the climbing formwork modification process, the permanent reference transfer point is protected and preserved. When the climbing formwork is reset, the permanent reference transfer point is used as the basis to complete the reset and calibration of the climbing formwork installation reference.

[0081] In the climbing formwork modification phase of special segment construction, before initiating the modification operation, a stable location on the already cast pier structure, unaffected by subsequent processes, can be selected to establish a permanent reference transfer point that spans the entire modification process. This permanent reference transfer point is fixed to the pier structure and possesses good stability, preventing positional changes due to external operations. Throughout the climbing formwork modification operation, the established permanent reference transfer point is continuously protected and preserved to prevent touch, damage, or positional displacement of the reference transfer point caused by scaffold disassembly, formwork adjustment, component relocation, or other operations during the modification process, ensuring that the permanent reference transfer point always maintains its initial setting.

[0082] When the special segment construction is completed and the climbing formwork equipment needs to be reset, the climbing formwork installation benchmark is directly reset and calibrated using the permanent benchmark transfer point as a reference. According to the position parameters of the benchmark transfer point, the position and posture of the climbing formwork frame and template are adjusted one by one so that the climbing formwork installation benchmark accurately returns to the control state suitable for the standard segment construction.

[0083] By setting and retaining permanent benchmark transfer points, this solution can effectively avoid the problem of the original construction benchmark being damaged or lost during the climbing formwork modification process, ensure the continuity of the alignment control basis before and after the construction of special segments, simplify the benchmark calibration process after the climbing formwork is reset, and stably maintain the alignment control effect of the entire pier.

[0084] In some embodiments, before proceeding with the standard segment cyclic construction up to the capping segment construction, the method further includes:

[0085] Based on the cumulative alignment deviation of the pier's total height, progressive correction amounts are set for the corresponding segments in the last few standard segments before the capping section is constructed. Through progressive adjustments across multiple segments, the total height deviation is converged, and finally, alignment compliance is achieved in the capping section.

[0086] As the standard segment construction continues and before entering the capping stage, the alignment of the completed pier body can be re-measured to obtain the cumulative deviation of the alignment from the first segment to the current last standard segment, and to clarify the distribution characteristics and overall offset trend of the alignment deviation within the entire height range.

[0087] Based on the re-measurement results of the cumulative alignment deviation across the entire height, a corresponding progressive correction amount was set for each of the last few standard segments before the capping section construction. The correction amount was gradually adjusted according to the deviation distribution to avoid abrupt changes in the pier alignment caused by excessive single correction amounts. During the cyclical construction of these last few standard segments, each segment was constructed according to the preset progressive correction amount. After the construction of each segment was completed, the alignment deviation of that segment was simultaneously re-measured, and the correction amount for the next segment was fine-tuned based on the re-measurement results to ensure that the deviation gradually converged and the pier alignment was gradually adjusted to the preset compliance range.

[0088] Through gradual adjustments of multiple reciprocal standard segments, the cumulative alignment deviation of the pier's total height is steadily reduced. Once the deviation is adjusted to within the compliant range, construction of the capping section begins. During the capping section construction, the installation accuracy of the capping section formwork is adjusted based on the results of the previous gradual adjustments, ensuring a smooth connection between the capping section alignment and the previously adjusted standard segment alignment. Ultimately, the compliant closure of the entire pier alignment is achieved in the capping section.

[0089] Specifically, the number of adjustment segments can be determined by combining the gradient distribution and rate of change of the cumulative alignment deviation along the entire pier height. When there are multiple deviation gradient levels and a rapid rate of change, standard segments with the same number of gradient levels are selected for adjustment. When the deviation gradient is singular and changes gradually, a fixed number of standard segments are selected for adjustment. When setting the progressive correction amount, the correction amount is allocated based on the contribution weight of each segment's deviation. The correction amount of each segment is positively correlated with the proportion of deviation in that segment. At the same time, the variation range of the correction amount of adjacent segments is constrained to ensure that the deviation decays uniformly along the pier height. Through the adjustment logic of gradient matching and weight allocation, the cumulative deviation converges smoothly, avoiding abrupt changes in alignment, and ultimately achieving compliant closure of the entire pier alignment at the capping section.

[0090] This multi-segment, gradual adjustment method can effectively avoid the problem of sudden changes in the pier alignment caused by a one-time adjustment of the entire height before the capping section construction. It prevents the impact of sudden changes in alignment on the stress stability of the high pier structure, while ensuring that the alignment of the entire pier is smoothly connected from bottom to top and meets the accuracy standards, thus guaranteeing the alignment control effect of the entire pier and improving the overall quality of the high pier structure.

[0091] In some implementations, when multiple piers are constructed asynchronously, the method further includes:

[0092] All piers share the same set of fixed measurement and control benchmarks for the site. The alignment re-measurement nodes of each pier are kept synchronized in time. The relative alignment deviations of adjacent piers are controlled synchronously, and the pre-correction parameters of the corresponding piers are adjusted synchronously based on the relative deviations.

[0093] In multi-pier asynchronous construction scenarios, multiple piers are constructed simultaneously, but their construction progress varies. To ensure consistent alignment across all piers and prevent excessive relative deviations between adjacent piers, all piers can utilize the same set of fixed site monitoring and control benchmarks. These benchmarks are pre-deployed within the construction site, possessing stable and reliable characteristics. They serve as a unified reference standard for controlling the alignment of all piers, ensuring consistent alignment requirements and preventing relative deviations caused by inconsistent benchmarks.

[0094] During construction, the alignment verification of each pier was strictly controlled. All pier alignment verifications were conducted simultaneously at the same time, acquiring alignment verification data for each pier concurrently. This facilitated timely comparison and analysis of alignment deviations between adjacent piers, avoiding errors in deviation judgment due to asynchronous verification times. Based on the synchronously acquired alignment verification data, the relative alignment deviation between adjacent piers was carefully managed. The alignment parameters of each adjacent pier were checked one by one to clarify the specific details of the relative deviation. If the relative deviation of an adjacent pier exceeded the preset control requirements, the pre-correction parameters of the corresponding pier were adjusted synchronously based on the relative deviation data, gradually reducing the relative deviation between adjacent piers and controlling it within a reasonable range.

[0095] This operational method effectively solves the problem of excessive relative deviations caused by independent alignment control of each pier in asynchronous multi-pier construction, preventing excessive relative deviations from affecting subsequent superstructure construction. Simultaneously, it ensures consistent alignment control accuracy across all piers, improving the overall alignment control quality of multi-pier construction, guaranteeing the structural stability of the entire bridge project, avoiding rework and rectification due to relative deviations, reducing construction cost waste, improving the overall progress efficiency of multi-pier construction, and ensuring stable and reliable alignment control throughout the entire multi-pier construction process.

[0096] Based on the above implementation methods, in view of the complex meteorological environments such as mountain valleys and coastal strong winds where high pier construction is located, which are prone to solar radiation temperature difference deformation, wind-induced vibration disturbance causing temporary alignment deviation misjudgment, and the interference of dynamic environmental factors on alignment control accuracy, the following implementation methods can be further considered to further improve the stability and accuracy of alignment control.

[0097] Specifically, during pier construction, temperature monitoring points can be set up at symmetrical locations on the pier cross-section, while vibration and displacement monitoring points can be set up on the climbing formwork. During the accuracy verification and retesting stages of each construction process, temperature and vibration displacement data at the corresponding points are collected simultaneously to clarify the temporary deformation of the pier and the temporary disturbance displacement of the formwork caused by environmental factors. When conducting pier alignment retesting and construction benchmark calibration, priority should be given to conducting fixed benchmark retesting during the early morning hours when sunlight has the least impact, obtaining basic alignment data unaffected by sunlight temperature differences. For accuracy verification work during which sunlight cannot be avoided, the elastic deformation of the pier caused by temperature differences is first calculated using the collected temperature data. This deformation is then removed from the measured alignment data to obtain the true permanent alignment data of the pier, avoiding misjudging temporary temperature difference deformation as alignment construction deviation and thus preventing erroneous correction operations.

[0098] For climbing formwork operations in strong winds, during the climbing and formwork adjustment processes, real-time monitoring of vibration displacement data is used to define a stable working window for the scaffold. Accuracy verification, formwork adjustment, and formwork closure are only carried out within this window when the scaffold vibration displacement is within a preset control range, avoiding accuracy adjustment errors caused by wind-induced disturbances. Simultaneously, during concrete pouring, the impact of wind-induced vibration on the formwork is monitored, and the pouring speed and sequence are fine-tuned in real time to offset the risk of formwork misalignment caused by the superposition of wind and pouring loads.

[0099] The above implementation methods can effectively eliminate the interference of complex environmental factors on alignment control data, avoid errors in correction caused by misjudgment, further improve the alignment control accuracy of high pier construction in complex environments, ensure that alignment control is not affected by changes in meteorological environment, expand the applicable scenarios of the original construction method, and further guarantee the construction quality and operation progress efficiency of high pier structures.

[0100] To address the issues of hidden formwork posture shifts caused by uneven stress on the formwork during climbing formwork cyclic construction, which are gradually transmitted with the advancement of the segments, and the interference of the subsequent segment alignment control benchmark with the deviation of the attachment system, the following implementation methods can be further considered to enhance the stability of alignment control and reduce the risk of alignment loss of control caused by hidden deviations.

[0101] Specifically, before the concrete pouring of each pier segment begins, the pre-determined pre-correction parameters for that segment can be used to simultaneously determine the pre-embedded positioning parameters for the climbing formwork attachment. The positioning of the pre-embedded parts must not only match the design requirements of the pier structure but also be adapted to the pre-controlled alignment of that segment, ensuring a correspondence between the pre-embedded positioning and the alignment control requirements. During the installation of the pre-embedded parts, a positioning mold rigidly connected to the pier formwork is used for fixation, preventing displacement caused by concrete flow impact and vibration during concrete pouring. After the concrete pouring of that segment is completed, the actual installation position of the pre-embedded parts is re-measured to form the initial positioning data of the attachment system, providing a basis for subsequent climbing formwork attachment installation.

[0102] Before coping with the climbing formwork, the installation accuracy of the attachment supports corresponding to the previous pier segment is checked. In addition to the routine planar position check, the verticality and horizontality parameters of the supports are checked simultaneously. Combined with the pre-correction parameters of this segment, minor adjustments are made to the installation posture of the supports to ensure that the forces on each set of attachment supports within the same section are balanced. This prevents the formwork from experiencing hidden torsion due to excessive force on one side of the support, which could lead to uncontrollable deviations in the formwork posture. During the cyclical construction of each standard segment, the installation accuracy data of the attachment system is incorporated into the calculation basis of the pre-correction parameters for the next segment, thus pre-controlling potential hidden deviations of the attachment system.

[0103] Through the above implementation methods, the implicit transmission path of alignment deviation can be controlled in advance from the source of the climbing formwork attachment force. This makes up for the shortcomings of conventional construction, which only focuses on the surface posture of the formwork and the frame and ignores the accumulation of deviations in the attachment system. It further improves the construction logic of pre-control of the whole process. It is especially suitable for the long-cycle construction scenario of ultra-high piers. It can effectively reduce the frame torsion and displacement problems that occur after multi-segment cycles. While improving the stability of the alignment control of the entire pier, it also optimizes the stress state of the climbing formwork attachment system, taking into account both construction quality and operation safety.

[0104] To address the issues of disconnect between the installation of the steel reinforcement cage and the alignment control process during conventional construction, and the hidden deviation in the posture of the formwork caused by the installation deviation of the cage pressing against the formwork, which leads to the failure of the alignment pre-control effect, the following implementation method can be further considered to avoid uncontrollable alignment deviations.

[0105] Specifically, before the formwork closing operation of each segment begins, the installation of the pier reinforcement cage for that segment can be completed first. The installation operation adopts the pier alignment control benchmark consistent with the formwork alignment control, avoiding process conflicts caused by two sets of control standards. Before starting the installation of the reinforcement cage, the installation positioning parameters of the reinforcement cage are set synchronously based on the pre-correction parameters determined for this segment, including the verticality control requirements of the vertical main bars, the planar positioning requirements of the horizontal stirrups, and the dimensional control requirements of the overall outer contour of the cage. All parameters are adapted to the pre-controlled posture of the formwork, so that after the cage is installed, it forms a matching reserved gap with the inner cavity of the formwork, and there will be no local protrusion or compression of the formwork.

[0106] During the installation of the reinforcing steel cage, matching positioning fixtures are used to fix the main reinforcement bars and stirrups. These fixtures constrain the vertical straightness of the main reinforcement bars and the circumferential flatness of the stirrups, preventing localized bulging or misalignment of the cage. Simultaneously, the overall posture of the cage is monitored during installation to ensure consistency with the pre-controlled direction of the pier's alignment. After installation, the entire cross-sectional outline of the cage is checked to confirm its compatibility with the pre-controlled posture of the formwork. The cage's installation positioning data is then incorporated into the fine-tuning of the pre-correction parameters for this segment, anticipating the potential impact of the reinforcing steel installation on the formwork posture.

[0107] During the formwork closing process, the posture of the reinforcing steel cage is controlled simultaneously to prevent the cage from shifting due to the formwork closing operation. After the formwork is closed, the gaps between the inner cavity of the formwork and the reinforcing steel cage are checked to ensure that the formwork is not subjected to continuous compression from the reinforcing steel cage and to avoid the problem of slow formwork displacement caused by the superposition of reinforcing steel compression force and pouring load during concrete pouring.

[0108] Through the above implementation methods, the requirements for alignment control are extended from the formwork and pouring processes to the rebar installation process, which solves the hidden deviation problem caused by the disconnect between the rebar process and alignment control in conventional construction. This avoids the risk of formwork posture deviation, further improves the reliability and full-process coverage of alignment pre-control, and ensures the uniformity of the concrete cover of the pier body rebar, taking into account both the alignment construction accuracy and structural durability of the high pier structure.

[0109] To address the issues of inelastic residual deformation, accumulated misalignment of formwork joints, and disconnect between formwork deformation and alignment pre-control requirements during climbing formwork cyclic construction, which prevent pre-correction parameters from being fully implemented, the following implementation methods can be further considered to improve the consistency of alignment control during cyclic construction.

[0110] Specifically, after the formwork arrives on site and passes inspection, an independent deformation tracking file can be established for each piece of prefabricated steel formwork. This file records the initial flatness of the surface, the straightness of the edges, the stiffness parameters of the surface, and the corresponding installation position of each piece of formwork, forming a basic data ledger for the formwork and providing a foundation for subsequent deformation compensation throughout the entire cycle. After each cycle of construction of a fixed number of standard segments, during the climbing and demolding, and formwork cleaning and curing phases, data on the actual condition of each piece of formwork is collected simultaneously, and the deformation tracking file of the corresponding formwork is updated. The focus is on recording changes in the inelastic residual deformation of the formwork surface, the amount of edge wear, and the fit of the joints, so as to understand the changes in the condition of the formwork after multiple turnovers.

[0111] After determining the pre-correction parameters for each construction segment, and combining this with the currently updated template deformation tracking data, targeted pre-adjustment compensation amounts are set for the installation posture of individual template panels. For templates exhibiting residual inward deformation, corresponding outward micro-adjustment amounts are pre-set during installation to offset the alignment deviation caused by the template's own deformation. For templates with wear at the joints, appropriate misalignment compensation adjustments are used during splicing operations to ensure that the overall flatness of the spliced ​​template meets the alignment pre-control requirements. Simultaneously, based on the template stiffness parameters, temporary support structures are added in advance for areas with weak surface stiffness to offset template deformation caused by lateral pressure during concrete pouring, thus incorporating deformation risks into the pre-control scope in advance.

[0112] By incorporating the deformation of the formwork itself during the turnover process into the entire process of alignment pre-control, the problem of alignment deviation caused by focusing only on the overall installation posture of the formwork and ignoring the cumulative residual deformation of individual formwork pieces in conventional construction is solved. This further improves the smoothness of the entire pier alignment in multi-segment cyclic construction, while also standardizing the turnover process of the formwork, extending the service life of the formwork, and taking into account both construction accuracy control and project cost management.

[0113] To address the issues of slight deformation of the scaffolding, implicit deviation of the formwork posture, and interference of dynamic load changes on the alignment control effect caused by uneven load distribution during conventional climbing formwork cyclic construction, the following implementation methods can be further adopted to further improve the stability of alignment control during cyclic construction.

[0114] Specifically, after the pre-correction parameters for each construction segment are determined, the load limits and balanced distribution requirements for each operating platform of the climbing formwork are simultaneously defined, taking into account the stress characteristics of the climbing formwork and the pre-control direction of the segment's alignment. The maximum weight of materials that can be stacked on each platform and the fixed stacking area are specified, with all stacking areas symmetrically arranged along the pier section to avoid lateral deformation of the formwork caused by concentrated loads on one side. Simultaneously, the load limits for the corresponding platform are optimized to match the pre-correction adjustment direction of the segment, preventing the risk of formwork posture deviation from being aggravated by load superposition, thus ensuring that load control requirements match the alignment pre-control objectives.

[0115] During the construction of this section, the load on the scaffolding was controlled according to pre-defined requirements. All construction materials and equipment were stacked within designated symmetrical areas, and the distribution of construction personnel was kept even to avoid a large number of personnel concentrating on one side of the scaffolding. In the procedures of adjusting the formwork accuracy and closing the formwork, unnecessary temporary loads on the scaffolding were cleared in advance, leaving only essential small construction equipment, which was also placed along the symmetrical area. This reduced the load on the scaffolding to a preset stable and controllable state, ensuring that the formwork posture adjustment process was not disturbed by additional loads, and allowing the pre-correction parameters to be stably implemented.

[0116] During the concrete pouring operation, the fixed end of the concrete delivery pump pipe is set on the formed pier structure to prevent the vibration and impact force of the pump pipe during operation from being transmitted to the climbing formwork and causing dynamic displacement of the formwork posture; at the same time, construction waste and excess materials generated during the pouring process are cleaned up to prevent materials from accumulating on one side of the frame and to maintain the balance of force on the frame throughout the process.

[0117] By implementing the above methods, construction load control is fully incorporated into the alignment pre-control process, which solves the problem of hidden deformation caused by uneven load on the formwork that is ignored in conventional construction, avoids formwork posture deviation caused by load changes, further improves the stability and accuracy of alignment control in multi-segment cyclic construction, and optimizes the long-term stress state of the climbing formwork, taking into account both construction accuracy control and operational safety.

[0118] The above description is merely a preferred embodiment and the technical principles employed in this application. This application is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions that can be made by those skilled in the art will not depart from the scope of protection of this application. Therefore, although this application has been described in detail through the above embodiments, this application is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of this application.

Claims

1. A high pier segmental climbing form construction and linear control method, characterized in that, Includes the following steps: S1. Based on the preset pier body alignment measurement and control benchmark and alignment deviation threshold, complete the pre-control of the installation accuracy of the first segment pier body formwork, pour the first segment pier body concrete and monitor the deformation and displacement of the formwork simultaneously, and re-measure the alignment of the first segment pier body after pouring to determine the initial benchmark for pier body construction. S2. Based on the initial benchmark for pier construction, the climbing formwork is assembled in stages. After each stage of assembly is completed, the accuracy of the formwork alignment is checked simultaneously. Once the accuracy meets the alignment deviation threshold requirement, the next stage of assembly is started. After all the assembly is completed, the climbing formwork installation benchmark is determined. S3. Based on the climbing formwork installation benchmark, standard segment cyclic construction is carried out. Within each cyclic segment, the pier body alignment of the previous segment is re-measured and the pre-correction parameters of this segment are determined. Then, the climbing formwork removal and pre-climbing accuracy verification, climbing formwork climbing process monitoring, accuracy locking and pre-correction adjustment after climbing to the position, final accuracy inspection before formwork closure, and concrete pouring process monitoring are completed in sequence. Finally, the pier body alignment of this segment is re-measured and the pre-correction parameters of the next segment are output. S4. Before the construction of the capping section, the full height alignment of the pier body is re-measured. Based on the re-measurement results, the installation accuracy of the capping section template is adjusted. After the pouring is completed, the alignment control results of the entire pier body are obtained. During the standard segment cyclic construction process, the method further includes: After each preset number of standard segments are constructed, the current climbing formwork installation benchmark and the pier alignment benchmark are fully calibrated based on the fixed measurement and control benchmark of the site. The calibrated benchmarks are used as the benchmarks for subsequent construction. During the standard segment cyclic construction process, the method further includes: Based on the previous segment's pier alignment re-measurement results and the aforementioned pre-correction parameters, the hydraulic cylinder synchronous action parameters and the pre-adjustment values ​​of the formwork climbing motion are matched in advance. During the climbing motion, the formwork posture is adjusted in real time according to the pre-adjustment values, and the alignment pre-control is completed after the climbing motion is in place. During the standard segment cyclic construction process, the method further includes: Before pouring concrete, based on the pre-correction parameters and the stress characteristics of the formwork in this section, the symmetrical pouring sequence, layer pouring parameters, and pouring speed control requirements of the concrete are set in advance, and the pouring operation is completed accordingly to offset the risk of formwork deviation caused by the pouring load. The method further includes the following steps during the phased assembly of the climbing formwork: Centered on the initial benchmark for pier construction, a symmetrical and synchronous assembly sequence is adopted. During the assembly process, temporary limiting structures are set up simultaneously, and the assembly posture of each frame is controlled according to the preset pre-adjustment values ​​to avoid the accumulation of asymmetrical deviations during the assembly process.

2. The method according to claim 1, characterized in that, The standard segment cyclic construction process also includes special segment construction, specifically including: When carrying out special segment construction, the current pier body alignment measurement and control benchmark is first re-measured and determined. During the climbing formwork modification process, the stability of the frame benchmark is monitored simultaneously. After the construction is completed, the pier body alignment is re-measured and the climbing formwork installation benchmark is reset, and the standard segment cyclic construction is resumed.

3. The method according to claim 1, characterized in that, The linear deviation threshold corresponds to each process node of the first segment pier construction, climbing formwork assembly, standard segment cyclic construction, and capping segment construction, and a matching deviation control level is set for each. Before each process node is constructed, it is first confirmed that the corresponding line type accuracy meets the deviation control level requirements of that node. When the line type accuracy exceeds the corresponding deviation control level, the current process is suspended, and a correction operation is performed. Construction is resumed after the correction is completed and the retest is qualified.

4. The method according to claim 2, characterized in that, When performing special segment construction, the method further includes: Before the climbing formwork is modified, a permanent reference transfer point is set on the already poured pier to cross the modification process. During the climbing formwork modification process, the permanent reference transfer point is protected and preserved. When the climbing formwork is reset, the permanent reference transfer point is used as the basis to complete the reset and calibration of the climbing formwork installation reference.

5. The method according to claim 1, characterized in that, Before proceeding with the standard segment cyclic construction up to the capping segment construction, the method further includes: Based on the cumulative alignment deviation of the pier's total height, progressive correction amounts are set for the corresponding segments in the last few standard segments before the capping section is constructed. Through progressive adjustments of multiple segments, the total height deviation is converged, and finally, the alignment compliance closure is achieved in the capping section.

6. The method according to claim 1, characterized in that, In the case of asynchronous construction of multiple piers, the method further includes: All piers share the same set of fixed measurement and control benchmarks for the site. The alignment re-measurement nodes of each pier are kept synchronized in time. The relative alignment deviation of adjacent piers is controlled synchronously, and the pre-correction parameters of the corresponding piers are adjusted synchronously based on the relative deviation.

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