Intelligent digital bridge overline incremental launching construction technology

Abstract

The invention relates to the technical field of steel box girder construction, in particular to an intelligent digital bridge overline incremental launching construction technology which comprises the steps that S1, construction working condition simulation is conducted, digital twinborn simulation is conducted on a construction stage according to site conditions, possible problems in construction are predicted in advance, and a construction scheme is optimized; s2, a temporary supporting system is installed, and a pushing support is assembled; s3, steel beam hoisting; s4, the walking type pushing equipment is debugged, top testing is carried out, and automatic pushing of the steel beam is carried out; s5, incremental launching construction is monitored, and an intelligent monitoring system is established; s6, a support is installed, and a beam is dropped in place; s7, temporary facilities are dismantled; various parameters in the incremental launching process are monitored in real time through a sensor system, construction accuracy and safety are ensured, continuous and stable propelling is achieved, errors and delay of manual operation are reduced, and a digital twin technology is adopted to comprehensively analyze and optimize an incremental launching scheme before construction.

Description

Technical Field

[0001] The invention relates to the technical field of steel box girder construction, and in particular to a cross-line jacking construction process for an intelligent digital bridge. Background Art

[0002] With the rapid economic development and the continuous advancement of urbanization, the demand for transportation continues to grow. Building efficient and safe bridges has become the key to meeting transportation needs. Cross-line bridges can effectively cross existing traffic routes, reduce interference with ground traffic, and improve traffic efficiency.

[0003] As an advanced bridge construction technology, jacking construction has unique advantages in the construction of cross-line bridges. In the traditional jacking process of steel box girders, the force and stroke of the beam body, the jacking position, etc. are all dependent on manual work, which may result in subjective judgment bias, inaccurate data, and the inability to form systematic management, which affects construction reliability and safety, and the construction quality cannot be quantified and controlled. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an intelligent digital bridge cross-line jacking construction process.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An intelligent digital bridge cross-line jacking construction process, comprising:

[0007] Step S1: Construction condition simulation: According to the on-site conditions, digital twin simulation is performed on the construction stage to predict possible problems in the construction in advance and optimize the construction plan;

[0008] Step S2, installing the temporary support system and assembling the push-pull bracket;

[0009] Step S3, hoisting the steel beam, lifting the steel beam segment to an appropriate height above the beam surface of the installed frontmost segment, lowering it into position, and hoisting the steel-concrete beam segment to a predetermined position;

[0010] Step S4, debug the walking type jacking equipment, test jacking, automatic jacking of steel beams, jacking process:

[0011] a. Start the hydraulic pump station and use the vertical lifting cylinder to lift the pushed component;

[0012] b. The vertical lifting cylinder is cut off, and the horizontal pushing cylinder pushes forward for a stroke, driving the pushed component to move;

[0013] c. The horizontal jacking cylinder is cut off, the vertical jacking cylinder is retracted, and the pushed component falls on the temporary pier;

[0014] d. The horizontal push cylinder is retracted and returns without load, and steps a to d are repeated until the pushed component is pushed to the installation position;

[0015] Step S5, monitoring the jacking construction, establishing an intelligent monitoring system, including a strain gauge, a positioning control system, and an intelligent programmable data collector, collecting data during the jacking process, including the displacement, posture, and jacking status of the steel beam, and transmitting the data to the central processor, which displays the data in real time on a display or provides it to the operator through an application on a mobile device;

[0016] Establish an intelligent decision-making theory system to support key decisions during the construction process, so that operators can analyze the progress of the construction, monitor the performance of key parameters, and optimize the construction plan. If the data deviates from the predetermined target value, the walking jacking equipment will be actively adjusted to ensure the accuracy and stability of the jacking process;

[0017] Step S6, installing the support and dropping the beam into place;

[0018] Step S7: dismantling temporary facilities.

[0019] Preferably, in step S4, the specific steps of debugging and testing the top include:

[0020] A. Install the pier top pushing system and the steel guide beam;

[0021] B. Installation of deviation correction and limit devices;

[0022] C. Clean the surface of the steel box beam and the top of the steel beam to ensure there is no debris;

[0023] D. Check the top and bottom of the steel beam. Before jacking, conduct a comprehensive survey of the line shape and elevation of the steel beam, and make inspection records. For individual cases, handle them to achieve the flatness required by the specifications and then carry out jacking construction;

[0024] E. Power system debugging: After the propulsion pump station is reinstalled, adjust the detection element of the stroke detection device to ensure that the detection device is normal, and adjust the speed regulating valve of each pump station to ensure that the movement speed of each top is consistent;

[0025] F. Test the jacking: turn on the power of the main console and the pump station, start the pump station, use the main console to control the jack, apply force for test jacking. During the test jacking, record the test time and speed, adjust the speed based on the comparison between the measured results and the calculated results, and do a good job of testing important data.

[0026] Preferably, in the test push in step F, the forward speed per minute and the push speed are controlled within the design requirements; the control is operated in a jog mode, and the measurement group measures the data of the forward distance each time the jog is performed, so as to provide accurate positioning after the push is initially in place and provide an operation basis;

[0027] During the trial, check whether the bridge structure is balanced and stable, whether there are any faults, and whether cracks occur in key stress-bearing parts. If there are any abnormal conditions, stop the trial, find out the causes, take appropriate measures to correct them, and then continue the trial.

[0028] Preferably, in step S4, the walking type jacking equipment comprises a vertical jacking oil cylinder, a horizontal jacking oil cylinder and a bottom plate, a slide is provided on one side of the upper part of the bottom plate, a slide box is provided on the slide, the vertical jacking oil cylinder is arranged in the slide box, and the output end of the horizontal jacking oil cylinder is connected to one side of the slide box;

[0029] The vertical lifting cylinder and the horizontal pushing cylinder are both provided with pressure sensors, and the sliding box is provided with a displacement sensor.

[0030] Preferably, in step S4, the horizontal jacking cylinder is pushed longitudinally, and debugging and testing should be carried out according to the operation process before use. Each time the jacking is carried out, the center line of the pushed beam section must be measured and controlled within the allowable range; if there is a deviation, it needs to be adjusted immediately;

[0031] During the jacking process, displacement observations are carried out, including the centerline offset of the beam body and the horizontal and vertical displacements of the pier top. Jacks are required to make timely adjustments during the jacking process. If the displacement exceeds the allowable value calculated in the design, the force is stopped immediately and the jacking force of each jack is readjusted.

[0032] Preferably, during the jacking process, pay attention to the changes in the jacking force, translation force, and descending force. If a sudden increase in the jacking force is found during the jacking process, stop in time and check the cause. During jacking, check the guide beam and box beam. If the guide beam component is deformed, the screws are loose, the connection between the guide beam and the steel beam is deformed, or the box beam is partially deformed, the jacking should be stopped immediately and analyzed and processed;

[0033] When pushing to the last beam section, pay attention to whether the beam section has reached the designed position. It must be pushed to the final position at night when the temperature is stable, and the beam length must be carefully calculated and determined based on the temperature. When pushing for the last time, small stroke jogging should be used to facilitate deviation correction and longitudinal movement into place.

[0034] Preferably, in step S5, actively adjusting the walking type pushing device includes:

[0035] Intelligent control: The intelligent algorithm in the display control system analyzes real-time data and automatically adjusts and calculates the operating parameters of the jacking equipment, such as force, speed and direction, to ensure accurate alignment of the steel beam during jacking;

[0036] Automatic adjustment: When it is detected that the position deviation of the steel beam exceeds the preset range, the system automatically triggers the adjustment operation to ensure that the steel beam can be aligned in time during the pushing process.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] 1. The present invention adopts intelligent digital technology to provide precise control means for the bridge cross-line jacking construction. Through the sensor system, various parameters in the jacking process, such as displacement, stress, inclination, etc., are monitored in real time to ensure the accuracy and safety of the construction. Intelligent digital construction can achieve continuous and stable advancement, reducing errors and delays in manual operations. Moreover, the digital management platform can monitor and dispatch the construction progress in real time, arrange resources reasonably, and ensure that the project is completed on time;

[0039] 2. The present invention adopts digital twin technology, which can comprehensively analyze and optimize the jacking scheme before construction, verify the feasibility of the scheme, discover potential problems in advance and formulate corresponding solutions;

[0040] 3. During the jacking process, the present invention adopts an intelligent monitoring system composed of RTK, an alignment intelligent control system and an intelligent programmable data collector to monitor the jacking construction. By scientifically and rationally combining design calculations, digital twins and monitoring data, an intelligent decision-making theoretical system is formed to provide support for key decisions in the construction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a workflow diagram of an intelligent digital bridge cross-line jacking construction process proposed by the present invention;

[0042] Figure 2 This is a system control principle diagram of an intelligent digital bridge cross-line jacking construction process proposed by the present invention;

[0043] Figure 3 A three-dimensional structural schematic diagram of a walking-type jacking equipment for an intelligent digital bridge cross-line jacking construction process proposed in the present invention.

[0044] In the figure: 1. slide; 2. slide box; 3. vertical lifting cylinder; 4. horizontal pushing cylinder; 5. bottom plate. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Reference Figure 1-3, an intelligent digital bridge cross-line jacking construction process, involving digital twin technology, automated jacking equipment, intelligent monitoring system and intelligent decision-making theory system;

[0047] Digital twin technology;

[0048] The digital twin technology is used to digitally simulate the construction process of the bridge's cross-line top-pushing, predict possible problems in the construction in advance, and optimize the construction plan. This improves the accuracy and reliability of the construction and reduces the risks and waste in the construction.

[0049] Automated jacking equipment;

[0050] The CNC jacking system composed of jacks and CNC center computer programs realizes the automatic control of the jacking process. The CNC jacking system can automatically adjust the jacking force and speed according to the preset programs and parameters to ensure the smoothness and accuracy of the jacking process. Compared with traditional manual operation, the automated jacking equipment greatly improves the construction efficiency and quality, while also reducing labor intensity and safety risks.

[0051] Intelligent monitoring system;

[0052] An intelligent monitoring system consisting of strain gauges, alignment control systems and intelligent programmable data collectors is used to establish an intelligent monitoring system. The system can monitor various data in the jacking process in real time and transmit the data to the central control system for analysis and processing. The monitoring system can realize the functions of real-time monitoring of the entire construction process, wireless data transmission, real-time data analysis, and real-time guidance of construction.

[0053] Intelligent decision-making theory system;

[0054] Establish an intelligent decision-making theory system to provide scientific decision-making basis for construction management personnel. The system can comprehensively analyze monitoring data, simulation results, design calculation results and other information to provide support for key decisions in the construction process, such as adjusting the jacking speed and optimizing the construction plan.

[0055] Pressure sensors, displacement sensors and RTK are set on the jacking equipment. These sensors monitor the operation of the steel box girder during the jacking process by continuously collecting data. The collected data includes coordinates, displacement, posture, etc. Data acquisition is the core of the process, which provides a digital description of the compaction process. The collected data is wirelessly transmitted to the central processor via the 5G network. The central processor is responsible for analyzing and processing the data and calculating the key parameters of the jacking process. Based on the real-time monitoring data, the system's built-in intelligent algorithm can automatically adjust the working parameters of the jacking process to achieve the desired effect and improve the consistency and efficiency of construction. The processed data is provided to the operator through a display screen or mobile device, providing real-time feedback on the status of the jacking process. The operator can see the information on the screen so that he can make adjustments as needed.

[0056] The specific steps of the construction process include:

[0057] Step S1: Before construction, conduct digital twin simulation:

[0058] A1. Digital twin calculation model, to establish the finite element model of steel box girder jacking operation construction.

[0059] A2. Construction phase simulation, with the following seven phases:

[0060] a) Prefabricate the first section of steel beam on the factory support and push the first section of steel box beam into place;

[0061] b) Hoist the steel box girder, put it in place on the temporary pier, and weld it with the previous section of steel box girder;

[0062] c) Push the second section of steel box girder into place;

[0063] d) Hoist the steel box girder, put it in place on the temporary pier, and weld it with the previous section of steel box girder;

[0064] e) Repeat steps c and d, pushing forward in a circular motion;

[0065] f) All box beams are pushed into place, and the guide beams and temporary piers are removed;

[0066] g) Bridge.

[0067] A3. Digital twin calculation results, construction condition simulation. According to the on-site conditions, digital twin simulation is performed on the construction stage. There are 38 working conditions in total. The calculation results of the working conditions are as follows:

[0068]

[0069]

[0070] As can be seen from the table above, the maximum cantilever is 52m, which is located in working condition 15. The maximum stress is located in the guide beam of working condition 23, which is 173.4Mpa, less than 210Mpa, meeting the requirements. The maximum displacement is located in working condition 15, which is 103mm, less than 200mm, meeting the requirements. The maximum pressure of the support is located in working condition 30, which is 633.4t, less than 800t. In summary, after simulating the design scheme through digital twin technology, all indicators meet the specification requirements.

[0071] Step S2: Temporary support system installation

[0072] In order to reduce the impact of superstructure construction on road traffic safety, the steel box girder sections are all constructed using the top-pushing method. There are three main types of support frames:

[0073] (1) Assembling the bracket

[0074] The main limbs of the assembled brackets are made of 426×8 steel pipe piles, with a horizontal spacing of 5*5000mm and a spacing of 3000mm along the bridge. The bottom is arranged as a 5000×2000×1000mm expanded foundation, and the bracket is connected to the expanded foundation through chemical anchor bolts.

[0075] (2) Push bracket

[0076] The top-pushing support adopts 800×16 steel pipe piles as the main limbs, with a horizontal spacing of 3000mm and a spacing of 3000mm along the bridge. Double-jointed channel steel 20a is used as the connection system. Double-jointed H-shaped steel 900×300 is arranged on the top of the top-pushing support pile as the horizontal distribution beam. Four-jointed Japanese-shaped steel 900×300 is arranged on the horizontal distribution beam. Steel plates are added to the upper and lower bottom surfaces as the longitudinal distribution beam. The top-pushing device and cushion seat are arranged on the longitudinal distribution beam. The bottom is arranged as a 6000×6000×1500mm expanded foundation, and the support is connected to the expanded foundation through chemical anchor bolts.

[0077] (3) Assemble the push-pull bracket

[0078] The push part and assembly part of the assembled push bracket are respectively the same as the above bracket, and a column steel pipe is added between the assembled and push brackets above the horizontal distribution beam of the push bracket, and the distribution beam of the assembled bracket extends to the top of the column. The main limb bracket of the bracket is connected with a channel steel 16a.

[0079] To improve installation efficiency, the above temporary brackets can be made into small-segment bolted lattice brackets for segment splicing during actual construction if construction conditions permit and are necessary. To facilitate the turnover and reuse of construction materials, strong parts can be used to replace weak parts if construction conditions are met and structural parts have passed empirical calculations.

[0080] Step S3: Steel beam hoisting

[0081] (1) The beam transporter transports the beam to the lifting point, and an 80t gantry crane is used to take the beam from the beam transporter and lift it to the steel beam erection location;

[0082] (2) Place the steel beam segments according to the predetermined position. If the component posture does not meet the installation requirements, lower it and readjust the position of the lifting point until it meets the lifting and assembly construction requirements;

[0083] (3) The steel beam segment is lifted to an appropriate height above the beam surface of the frontmost segment that has been installed, lowered into position, and the steel-concrete beam segment is hoisted to the predetermined position.

[0084] (4) Use an 80t gantry crane to install the steel beam. The horizontal installation order of the steel beam segments is: install symmetrically from the middle to both sides. The heaviest section of the steel beam is about 56.4t, and the gantry crane has a lifting capacity of 80t, which meets the lifting requirements.

[0085] Step S4, debugging the walking type jacking equipment, testing the jacking, and automatically jacking the steel beam;

[0086] According to calculations, comprehensive consideration of design requirements, and combined with the structural form of this bridge, walking jacking equipment is used during construction. According to the calculation book, the maximum reaction force of a single lifting point is 620t, so a walking jacking equipment with a lifting capacity of not less than 800t is selected. Among them, the reaction force of some jacking brackets is small, not exceeding 500t, and a 600t walking jacking equipment can be selected. The jacking distance is about 164.640m.

[0087] The walking type jacking equipment comprises a vertical jacking oil cylinder 3, a horizontal jacking oil cylinder 4 and a bottom plate 5. A slide 1 is provided on one side of the upper part of the bottom plate 5. A slide box 2 is provided on the slide 1. The vertical jacking oil cylinder 3 is arranged in the slide box 2. The output end of the horizontal jacking oil cylinder 4 is connected to one side of the slide box 2.

[0088] The vertical lifting cylinder 3 and the horizontal pushing cylinder 4 are both provided with pressure sensors, and the sliding box 2 is provided with a displacement sensor.

[0089] The vertical lifting cylinder 3 of the walking jack lifts the jack, the horizontal pushing cylinder 4 of the walking jack pushes the slide box, the vertical lifting cylinder 3 of the walking jack shrinks, and the horizontal pushing cylinder 4 of the walking jack returns without load. Repeat the above steps to complete the pushing work.

[0090] Debugging and testing the walking type jacking equipment:

[0091] (1) Install the pier top pushing system and the steel guide beam;

[0092] (2) Installation of deviation correction and limit devices;

[0093] The deviation correction and limit device are continuously moved forward as the pushing progresses.

[0094] (3) Clean the steel box girder surface;

[0095] Arrange special personnel to clean up all unnecessary objects on the steel beams to ensure that there is no debris.

[0096] (4) Inspection on the top and bottom of the steel beam;

[0097] Before jacking, the line shape and elevation of the steel beam are comprehensively measured and checked, and inspection records are made. For individual cases, the flatness and other conditions that meet the requirements of the specifications must be met before jacking construction can be carried out.

[0098] (5) Power system debugging

[0099] As the construction progresses, the pump station needs to be reinstalled. Adjust the detection element of the stroke detection device to ensure normal contact and detection of the detection device. Adjust the speed regulating valve of each pump station to make the movement speed of each top consistent.

[0100] (6) Test top

[0101] Turn on the power of the main console and the pump station, start the pump station, and use the main console to control the two jacks to apply force to test the tops simultaneously.

[0102] During the test, record the test time and speed, and adjust the speed according to the comparison between the measured results and the calculated results. That is, the three important data tests should be done well;

[0103] First, the forward speed per minute should be controlled within the design requirements;

[0104] Second, the control is operated in a jog mode. The measurement team should measure the data of the forward distance of each jog to provide a basis for accurate positioning after the jacking is initially in place. During the jacking test, it is necessary to check whether the bridge structure is balanced and stable, whether there are any faults, and whether cracks occur in the key stress-bearing parts. If there is any abnormality, the jacking test should be stopped, and the cause should be found out and corresponding measures should be taken to rectify it before continuing the jacking test.

[0105] The specific steps of the formal promotion process are as follows:

[0106] The first step: start the hydraulic pump station, and the vertical lifting cylinder 3 lifts the pushed component.

[0107] The second step: the lifting cylinder is cut off, the horizontal pushing cylinder 4 pushes forward a stroke, and the pushed component is pushed forward 600mm.

[0108] Step 3: The horizontal jacking cylinder 4 is cut off, the vertical jacking cylinder 3 is retracted, and the pushed component falls on the temporary pier.

[0109] Step 4: The horizontal push cylinder 4 is retracted, and steps 1 to 4 are repeated until the pushed component is pushed to the installation position.

[0110] Step S5: Pushing construction monitoring

[0111] Intelligent linear monitoring, through the positioning intelligent control system, the steel box girder jacking can be carried out quickly and accurately. The positioning intelligent control system is mainly composed of a fixed base station, two mobile base stations and a display control system. The fixed base station and the mobile base station receive and transmit signals to the display screen through wireless radar. The positioning intelligent control system is also part of the monitoring system, providing the displacement data of the steel beam during the steel beam jacking process. The main usage steps are as follows:

[0112] (1) System initialization

[0113] ①、Fixed base station installation: Select a stable fixed location at the construction site and install the fixed base station. The fixed base station is equipped with a high-precision radar transmitter and receiver to transmit reference signals and receive signals from the mobile base station.

[0114] ②. Mobile base station installation: Install two mobile base stations on the steel box girder to ensure that these base stations can move with the movement of the jacking equipment and the steel beam, and capture their spatial position in real time.

[0115] ③. Connection and calibration: Connect the fixed base station and mobile base station to the display control system via a wireless network, and perform system calibration to ensure the accuracy and synchronization of signal transmission between all devices.

[0116] (2) Data collection and transmission

[0117] The RTK equipment uses satellite signals and reference data from base stations to calculate and provide precise position information for the steel box girder. This process is real-time, so the position data can be continuously updated. After the central processor receives the real-time position information provided by the RTK equipment, it can adjust and control the position of the steel box girder based on this data. During the jacking construction process, the RTK equipment continuously provides new position data, and the central processor continuously monitors and makes adjustments as needed to ensure the accuracy of the jacking trajectory.

[0118] (3) Real-time monitoring and analysis

[0119] 1) Sensors continuously collect data during the jacking process, such as the displacement, posture and jacking status of the steel beam. These data are transmitted to the central processor. The central processor displays the real-time data on the monitor or provides it to the operator through the application of the mobile device. These data are usually presented in the form of charts, numbers or graphics, so that the operator can clearly understand the progress of the compaction process and the status of key parameters.

[0120] 2) The operator can analyze the construction progress and the performance of key parameters based on real-time data. The displacement, posture and jacking status of the steel beam can be monitored in real time to ensure the accuracy and stability of the jacking process. If the data deviates from the predetermined target value, the operator can take measures to adjust the working parameters of the jacking equipment.

[0121] The friction force is calculated based on the fulcrum reaction force of the working condition and verified with the oil pressure gauge. The jacking operation is synchronous jacking, and the horizontal force of the jacking box beam can be ignored.

[0122] Displacement observation: Displacement observation mainly refers to the centerline offset of the beam and the horizontal and vertical displacement of the pier top. During the jacking process, the jack needs to be used for timely adjustment. Pier top displacement observation is very important. The maximum displacement value is calculated based on the allowable displacement in the design. The coordinates are converted and continuously observed from the start of force application to the start of movement of the beam. Once the displacement exceeds the allowable value in the design calculation, the force is stopped immediately and the jacking force of each jack is readjusted.

[0123] Applying thrust: The thrust of each pier is adjusted according to the friction resistance and reflected by the oil gauge. A high-precision oil gauge should be selected. The jack and oil gauge should be calibrated before use.

[0124] The jacking system should be debugged and tested according to the operating procedures before use. Each time the jacking is performed, the center line of the jacking beam section must be measured and controlled within the allowable range; if there is a deviation, it needs to be adjusted immediately.

[0125] If the jacking force suddenly increases during the jacking process, it should be stopped in time and the cause should be checked. During jacking, a special person should be assigned to check the guide beam and box beam. If the guide beam component is deformed, the screws are loose, the connection between the guide beam and the steel beam is deformed, or the box beam is partially deformed, the jacking should be stopped immediately and analyzed and handled.

[0126] Pay attention to the changes in lifting force, translation force, and descending force during the jacking process. When jacking to the last beam section, pay special attention to whether the beam section has reached the designed position. It must be jacked to the final position at night when the temperature is stable, and the beam length must be carefully calculated and measured based on the temperature. When jacking for the last time, a small stroke jog should be used to correct the deviation and move the beam into place.

[0127] (4) Automatic control and adjustment

[0128] Intelligent control: The intelligent algorithm in the display control system analyzes real-time data and automatically adjusts and calculates the operating parameters of the jacking equipment, such as force, speed and direction, to ensure accurate alignment of the steel beam during the jacking process.

[0129] Automatic adjustment: When it is detected that the position deviation of the steel beam exceeds the preset range, the system automatically triggers the adjustment operation to ensure that the steel beam can be aligned in time during the pushing process.

[0130] (5) Risk warning and emergency response

[0131] Risk assessment: The system has a built-in risk assessment mechanism that uses historical data and real-time monitoring to assess the risks that may arise during the push process.

[0132] Early warning mechanism: Once a potential risk is detected, the system will issue a warning through the display control system and recommend adjustment measures.

[0133] Emergency plan: The display control system is equipped with an emergency plan to deal with emergencies and ensure the safety of the construction process.

[0134] Step S6: Install the support and drop the beam into place

[0135] According to the design requirements, the relative height difference of each support point should not exceed 1cm, and the beam should be dropped cyclically until it reaches the designed elevation and the support is fully stressed. Each pier should be controlled to drop by 1cm each time. Strictly abide by the technical rules of the jack, the lifting should not exceed the lifting capacity, and the lifting height should not exceed three-quarters of the piston height each time. Unified command and unified action should be taken during operation. During the beam dropping process, the empty distance of the beam should be kept within 1.5cm. It is strictly forbidden to drop the beam at two supports at the same time. The oil inlet pressure should be controlled to ensure that the two jacks at the same support point are evenly stressed, and the beam dropping speed should be controlled to drop slowly and evenly. Measurements should be made at any time as the jack is lifted, retracted, and the beam dropping pads are removed to ensure that the height difference at the bottom of the beam is controlled within the design range.

[0136] Step S7: Dismantling of temporary facilities

[0137] 1) After the guide beam is pushed to the designed position by the steel beam, it is suspended by a large crane, and the connection between the guide beam and the main beam is cut off with an air gun. The whole beam is suspended on the ground and disassembled. Be careful not to damage the steel beam during the cutting process, and use a hand grinding wheel to smooth the uneven parts and repaint them.

[0138] 2) After the jacking system and cushion beam are disconnected, they are hoisted to the ground one by one and the site is cleaned up in time.

[0139] 3) The steel pipe piers are moved one by one by the crane and laid on the ground. The temporary foundation is broken and dismantled with a hydraulic breaker.

[0140] In addition, safety measures during construction:

[0141] The project management personnel, supporting personnel and top-pushing construction personnel of each pier should be in place, and on-site briefing and training should be conducted again to clarify the responsibilities and work content of each person and ensure that each performs their duties: the project management team, top-pushing construction team, and monitoring and measurement team should uniformly adopt a set of information transmission systems to optimize the execution efficiency of control instructions, and require the person in charge of each pier and equipment to report any problems if any, and execute the next instruction in sequence if there are no problems, so as to improve work efficiency;

[0142] (1) Guide beam structure design drawings, main bridge steel beam structure design drawings, design instructions, block stress, weight table, etc.

[0143] (2) Geological conditions at the bridge site.

[0144] (3) Bridge pier structure diagram and completion mileage, elevation, and centerline measurement data.

[0145] (4) Inspection data of assembly platform and pier top layout

[0146] (5) Use a crane to place the bearing near the pier top bearing installation location.

[0147] (6) Check whether all the jacking equipment is normal and whether all the line connections are correct.

[0148] The advantages of using intelligent digital bridge cross-line jacking construction technology are:

[0149] Reduce the use of formwork: By adopting the top-pushing construction method, we can avoid equipment such as formwork supports and large cranes, thereby reducing the use of formwork.

[0150] This not only reduces the difficulty and danger of construction during the construction process, but also reduces the construction waste and resource consumption caused by formwork.

[0151] Intensive construction: The intelligent digital bridge cross-line jacking construction method focuses on intensive construction, and ensures the accuracy and efficiency of the construction process through precise digital twins and optimized design.

[0152] Intensive construction helps save limited resources, reduce environmental pollution caused by vehicle transportation, and achieve a green construction model.

[0153] Real-time monitoring and early warning: This method uses advanced sensor systems and intelligent monitoring equipment to monitor various parameters in the construction process in real time, such as displacement, stress, inclination, etc. Once an abnormal situation is found, the system will immediately issue an alarm, providing strong protection for construction safety and helping to take timely measures to avoid environmental pollution.

[0154] Reasonable allocation and optimization of resources: The digital management platform can monitor the construction progress and resource consumption in real time, and realize the reasonable allocation and optimal utilization of resources. This helps to reduce construction costs while reducing unnecessary waste of resources and environmental pollution.

[0155] Reduce noise and vibration: Compared with traditional construction methods, the intelligent digital bridge cross-line top-pushing construction method generates less noise and vibration during the construction process. This helps reduce the impact on the surrounding environment and residents' lives and protect the ecological environment.

[0156] Reusability: Since no steel formwork support is required, the formwork can be checked for wear, regularly repaired and reinforced to improve the reusability of the formwork. This not only reduces the cost of formwork maintenance, but also reduces the construction waste generated by frequent formwork replacement.

[0157] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0158] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0159] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

Claims

1. An intelligent digital bridge cross-line jacking construction process, characterized in that: Specifically include: Step S1: Construction condition simulation: According to the on-site conditions, digital twin simulation is performed on the construction stage to predict possible problems in the construction in advance and optimize the construction plan; Step S2, installing the temporary support system and assembling the push-pull bracket; Step S3, hoisting the steel beam, lifting the steel beam segment to an appropriate height above the beam surface of the installed frontmost segment, lowering it into position, and hoisting the steel-concrete beam segment to a predetermined position; Step S4, debug the walking type jacking equipment, test jacking, automatic jacking of steel beams, jacking process: a. Start the hydraulic pump station and use the vertical lifting cylinder (3) to lift the component to be pushed; b. The vertical lifting cylinder (3) is stopped, and the horizontal pushing cylinder (4) pushes forward for a stroke, driving the pushed component to move; c. The horizontal jacking cylinder (4) is closed, the vertical jacking cylinder (3) is retracted, and the pushed component falls onto the temporary pier; d. The horizontal push cylinder (4) is retracted and returns without load, and steps a to d are repeated until the push component is pushed to the installation position; Step S5, monitoring the jacking construction, establishing an intelligent monitoring system, including a strain gauge, a positioning control system, and an intelligent programmable data collector, collecting data during the jacking process, including the displacement, posture, and jacking status of the steel beam, and transmitting the data to the central processor, which displays the data in real time on a display or provides it to the operator through an application on a mobile device; Establish an intelligent decision-making theory system to support key decisions during the construction process, so that operators can analyze the progress of the construction, monitor the performance of key parameters, and optimize the construction plan. If the data deviates from the predetermined target value, the walking jacking equipment will be actively adjusted to ensure the accuracy and stability of the jacking process; Step S6, installing the support and dropping the beam into place; Step S7: dismantling temporary facilities.

2. According to claim 1, the intelligent digital bridge cross-line jacking construction process is characterized in that: In step S4, the specific steps of debugging and testing the top include: A. Install the pier top pushing system and the steel guide beam; B. Installation of deviation correction and limit devices; C. Clean the surface of the steel box beam and the top of the steel beam to ensure there is no debris; D. Check the top and bottom of the steel beam. Before jacking, conduct a comprehensive survey of the line shape and elevation of the steel beam, and make inspection records. For individual cases, handle them to achieve the flatness required by the specifications and then carry out jacking construction; E. Power system debugging: After the propulsion pump station is reinstalled, adjust the detection element of the stroke detection device to ensure that the detection device is normal, and adjust the speed regulating valve of each pump station to ensure that the movement speed of each top is consistent; F. Test the jacking: turn on the power of the main console and the pump station, start the pump station, use the main console to control the jack, apply force for test jacking. During the test jacking, record the test time and speed, adjust the speed based on the comparison between the measured results and the calculated results, and do a good job of testing important data.

3. According to claim 2, the intelligent digital bridge cross-line jacking construction process is characterized in that: In the step F, the forward speed per minute and the pushing speed are controlled within the design requirements; the control is operated in a jog mode, and the measurement group measures the data of the forward distance each time the jog is performed, so as to provide accurate positioning after the pushing is initially in place and provide an operation basis; During the trial, check whether the bridge structure is balanced and stable, whether there are any faults, and whether cracks occur in key stress-bearing parts. If there are any abnormal conditions, stop the trial, find out the causes, take appropriate measures to correct them, and then continue the trial.

4. According to claim 1, the intelligent digital bridge cross-line jacking construction process is characterized in that: In step S4, the walking type jacking device comprises a vertical jacking cylinder (3), a horizontal jacking cylinder (4) and a base plate (5), a slide (1) is provided on one side of the upper part of the base plate (5), a slide box (2) is provided on the slide (1), the vertical jacking cylinder (3) is arranged in the slide box (2), and the output end of the horizontal jacking cylinder (4) is connected to one side of the slide box (2); The vertical lifting cylinder (3) and the horizontal pushing cylinder (4) are both provided with pressure sensors, and the sliding box (2) is provided with a displacement sensor.

5. According to claim 4, the intelligent digital bridge cross-line jacking construction process is characterized in that: In step S4, the horizontal jacking cylinder (4) is jacked longitudinally. Before use, it should be debugged and tested according to the operating procedures. Each time the jacking is performed, the center line of the jacked beam section must be measured and controlled within the allowable range. If there is a deviation, it needs to be adjusted immediately. During the jacking process, displacement observations are carried out, including the centerline offset of the beam body and the horizontal and vertical displacements of the pier top. Jacks are required to make timely adjustments during the jacking process. If the displacement exceeds the allowable value calculated in the design, the force is stopped immediately and the jacking force of each jack is readjusted.

6. According to claim 5, the intelligent digital bridge cross-line jacking construction process is characterized in that: During the jacking process, pay attention to the changes in the jacking force, translation force, and descending force. If the jacking force suddenly rises during the jacking process, stop in time and check the cause. During jacking, check the guide beam and box beam. If the guide beam component is deformed, the screws are loose, the connection between the guide beam and the steel beam is deformed, or the box beam is partially deformed, stop jacking immediately and conduct analysis and treatment; When pushing to the last beam section, pay attention to whether the beam section has reached the designed position. It must be pushed to the final position at night when the temperature is stable, and the beam length must be carefully calculated and determined based on the temperature. When pushing for the last time, small stroke jogging should be used to facilitate deviation correction and longitudinal movement into place.

7. According to claim 1, the intelligent digital bridge cross-line jacking construction process is characterized in that: In the step S5, actively adjusting the walking type pushing device includes: Intelligent control: The intelligent algorithm in the display control system analyzes real-time data and automatically adjusts and calculates the operating parameters of the jacking equipment, such as force, speed and direction, to ensure accurate alignment of the steel beam during jacking; Automatic adjustment: When it is detected that the position deviation of the steel beam exceeds the preset range, the system automatically triggers the adjustment operation to ensure that the steel beam can be aligned in time during the pushing process.

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