Steel truss beam self-adaptive intelligent pushing method and monitoring system

Abstract

The application relates to the field of bridge engineering informatization technology, in particular to a steel truss girder self-adaptive intelligent pushing method and a monitoring system.The method comprises the following steps: vertically lifting the steel truss girder at each sliding block, obtaining the support reaction force of each sliding block on the steel truss girder, and falling the lifting to make the sliding block bear the steel truss girder; according to the support reaction force and a preset friction coefficient, limiting the trial pushing longitudinal horizontal force range, gradually increasing the longitudinal horizontal force on the steel truss girder in the trial pushing longitudinal horizontal force range until the steel truss girder moves, and obtaining the longitudinal horizontal force setting value; continuously moving the steel truss girder, and based on the longitudinal horizontal force setting value, setting the longitudinal horizontal force alarm range, monitoring the longitudinal horizontal force of the steel truss girder until the steel truss girder moves to a set position at a set speed. The method can solve the technical problems that in the prior art, multi-point synchronous pushing needs a large amount of manual intervention and judgment, and operation errors and construction safety risks caused by human subjective judgment errors exist.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bridge engineering informatization technology, in particular to a steel truss girder self-adaptive intelligent jacking method and monitoring system. BACKGROUND

[0002] The jacking method is widely used in bridge construction due to its advantages such as not affecting the traffic operation under the bridge and not requiring large mechanical equipment. According to the distribution of jacking force, it is divided into single-point jacking and multi-point jacking. In the multi-point synchronous jacking process, the horizontal jacks balance the friction force of the horizontal jacking force on the pier with the friction force of the beam on the pier, which is beneficial to the stress safety of the pier.

[0003] At present, the existing multi-point jacking tool has the ability of multi-point synchronous jacking, but since the jacking tool only controls whether the hydraulic equipment can jacking the steel truss to move, the data is closed and cannot be effectively supervised, and there are still some deficiencies in the actual jacking construction process.

[0004] Multi-point synchronous jacking requires a large amount of manual intervention and judgment, and there are operation errors and construction safety risks caused by human subjective judgment errors. The initial jacking parameters are set by manual, the intelligent degree is not high enough, the efficiency is low, and the function of "one-key jacking" is not possessed, and the experience value may be wrong in special environment, causing safety risks. SUMMARY

[0005] The present application provides a steel truss girder self-adaptive intelligent jacking method and monitoring system, which can solve the technical problems of multi-point synchronous jacking requiring a large amount of manual intervention and judgment, and operation errors and construction safety risks caused by human subjective judgment errors in the prior art, and achieve the function target of "one-key jacking".

[0006] To achieve the above purpose, the technical scheme adopted by the present application is:

[0007] In a first aspect, the present application provides a steel truss girder self-adaptive intelligent jacking method, comprising the following steps:

[0008] The jacks arranged at the same node position as the sliding block before jacking are used to vertically jack the steel truss girder, the reaction force of each sliding block on the steel truss girder is obtained, and the sliding block is caused to bear the steel truss girder by falling;

[0009] According to the reaction force and a preset friction coefficient, the longitudinal horizontal force range is limited, and the longitudinal horizontal force on the steel truss girder is gradually increased within the longitudinal horizontal force range until the steel truss girder moves, and the longitudinal horizontal force setting value is obtained;

[0010] Continuously moving the steel truss and setting a longitudinal horizontal force alarm range based on the longitudinal horizontal force setting value, monitoring the longitudinal horizontal force of the steel truss until the steel truss is moved to a set position at a set speed.

[0011] In some optional schemes, the step of limiting a trial pushing longitudinal horizontal force range according to the support reaction forces and the preset friction coefficients and gradually increasing the longitudinal horizontal force of the steel truss in the trial pushing longitudinal horizontal force range until the steel truss moves to obtain the longitudinal horizontal force setting value comprises:

[0012] According to each of the support reaction forces and the preset friction coefficients, an initial longitudinal horizontal force corresponding to each of the sliding blocks is obtained.

[0013] In a range less than or equal to the initial longitudinal horizontal force, the longitudinal horizontal force of the sliding block is gradually increased, and the sliding block is trial pushed;

[0014] If the sliding block moves, the longitudinal horizontal force of the sliding block when the sliding block moves is taken as the longitudinal horizontal force setting value.

[0015] If the sliding block does not move when the longitudinal horizontal force reaches the initial longitudinal horizontal force, the initial horizontal pushing force is updated after the preset friction coefficient is increased, the trial pushing process of the sliding block is repeated until the sliding block moves, and the longitudinal horizontal force of the sliding block when the sliding block moves is taken as the longitudinal horizontal force setting value.

[0016] In some optional schemes, the step of setting a longitudinal horizontal force alarm range based on the longitudinal horizontal force setting value and monitoring the longitudinal horizontal force of the steel truss comprises:

[0017] In the process of moving the steel truss, the longitudinal horizontal force applied to the steel truss is obtained in real time.

[0018] It is judged whether the longitudinal horizontal force applied to the steel truss is within the longitudinal horizontal force alarm range, and if not, an alarm signal is output and the pushing is stopped.

[0019] In some optional schemes, in the process of moving the steel truss, if the lateral deviation of the steel truss in the moving direction exceeds the displacement limit, a deviation correction device arranged on both sides of the sliding block is controlled to correct the lateral position of the steel truss according to the lateral deviation.

[0020] In some optional schemes, the step of, in the process of moving the steel truss, if the lateral deviation of the steel truss in the moving direction exceeds the displacement limit, controlling a deviation correction device arranged on both sides of the sliding block to correct the lateral position of the steel truss according to the lateral deviation comprises:

[0021] Obtaining the transverse deviation monitoring data of the steel truss girder by laser range finders arranged on both sides of at least two piers of the steel truss girder;

[0022] According to the transverse deviation monitoring data, the central axis linear equation of the current steel truss girder is calculated;

[0023] According to the central axis linear equation, the transverse deviation value of the steel truss girder at the position of each pier is determined;

[0024] When the transverse deviation value exceeds the preset deviation limit value, and the jacking speed of the steel truss girder is greater than zero, the transverse position of the steel truss girder is dynamically corrected by the correction device arranged on both sides of the slider according to the transverse deviation value.

[0025] In some optional schemes, the steel truss girder adaptive intelligent jacking method further comprises:

[0026] During jacking, the displacement monitoring data of the steel truss girder is obtained in real time;

[0027] According to the displacement monitoring data, the current construction progress of the steel truss girder is continuously updated and visually displayed through the established BIM model of the steel truss girder and the steel guide beam.

[0028] In some optional schemes, the steel truss girder adaptive intelligent jacking method further comprises:

[0029] The established BIM model of the steel truss girder and the steel guide beam, wherein the steel truss girder in the BIM model is located at the erected position and is fixed in position, and is divided into a plurality of standard blocks, and the steel guide beam is controlled to move through the displacement monitoring data;

[0030] Before the steel truss girder jacking construction, all the standard blocks of the steel truss girder are hidden;

[0031] During the jacking construction step, when the steel truss girder moves by a set interval, the steel guide beam in the BIM model is controlled to move through the displacement monitoring data, and when the displacement monitoring data increases by a set interval, a standard block in front of the steel truss girder in the BIM model is converted from a hidden state to a displayed state, and a standard block behind the steel truss girder is converted from a displayed state to a hidden state.

[0032] In a second aspect, the present application also provides a steel truss girder adaptive intelligent jacking monitoring system, comprising:

[0033] The data acquisition module is used to obtain the reaction force of each sliding block on the steel truss girder when the steel truss girder is jacked vertically by the jacks arranged at the same node position as the sliding block before jacking;

[0034] A pushing control module is configured to define a range of the trial pushing longitudinal horizontal force according to the reaction force and a preset friction coefficient, and gradually increase the longitudinal horizontal force on the steel truss until the steel truss moves to obtain a longitudinal horizontal force setting value; continue to move the steel truss and set a longitudinal horizontal force alarm range based on the longitudinal horizontal force setting value, and monitor the longitudinal horizontal force on the steel truss until the steel truss moves to a set position at a set speed.

[0035] In some optional solutions, the steel truss adaptive intelligent pushing monitoring system further comprises an intelligent deviation correction module and a construction progress monitoring module.

[0036] The intelligent deviation correction module is configured to, during the movement of the steel truss, if the lateral deviation of the steel truss in the movement direction exceeds a displacement limit, control the deviation correction device arranged on both sides of the sliding block to correct the lateral position of the steel truss according to the lateral deviation.

[0037] The construction progress monitoring module is configured to continuously update and visually display the current construction progress of the steel truss according to the displacement monitoring data and the established BIM model of the steel truss and the steel guide beam.

[0038] In some optional solutions, the steel truss adaptive intelligent pushing monitoring system further comprises a jack intelligent monitoring module and a structure stress monitoring module.

[0039] The jack intelligent monitoring module is configured to monitor and display real-time data of each jack, and give a warning according to a corresponding set stroke and / or jacking force warning value.

[0040] The structure stress monitoring module is configured to monitor and display the stress of the key stress position of the steel truss and the steel guide beam, and give a warning according to a corresponding set stress warning value.

[0041] Compared with the prior art, the advantages of the present application are that: in the present application, the jacks and the sliding blocks are arranged at the same node position before pushing, so that the steel truss weighing process is more accurate; the vertical jacking of the steel truss by the jacks arranged at the same node position before pushing is used to obtain the reaction force of each sliding block on the steel truss, the accurate weight of the steel truss is obtained through the reaction force, the range of the trial pushing longitudinal horizontal force is limited based on the reaction force and the preset friction coefficient, the longitudinal horizontal force on the steel truss is gradually increased within the range of the trial pushing longitudinal horizontal force until the steel truss moves to obtain a longitudinal horizontal force setting value, the longitudinal horizontal force setting value obtained in this way is more accurate, when the steel truss continues to move, the longitudinal horizontal force alarm range set based on the longitudinal horizontal force setting value is also more accurate, and the monitoring of the longitudinal horizontal force on the steel truss based on the longitudinal horizontal force alarm range makes the entire pushing process safer.

[0042] In addition, in the trial jacking process, the steel truss cannot be moved in the range of the trial jacking longitudinal horizontal force, and the trial jacking and the friction coefficient are iterated until the steel truss jacking sliding movement; the longitudinal horizontal force of the horizontal jack is obtained after the steel truss jacking sliding movement, and the longitudinal horizontal force is used to set the jacking force adjustment range of the self-adaptive jacking of each horizontal jack according to the friction force change in the jacking sliding process, i.e. the longitudinal horizontal force alarm range, so as to realize the function target of "one-key jacking" and comprehensively improve the control precision and automation level of the existing jacking construction.

[0043] In addition, in the process of moving the steel truss, whether the transverse deviation of the steel truss in the moving direction, i.e. the deviation perpendicular to the jacking moving direction, exceeds the displacement limit, the deviation correction device arranged on both sides of the sliding block is controlled to correct the transverse position of the steel truss. And according to the real-time displacement monitoring data, the current construction progress of the steel truss is continuously updated and visually displayed through the established BIM model of the steel truss and the steel guide beam. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0045] Figure 1 Flow chart of the steel truss self-adaptive intelligent jacking method in the embodiment of the present application;

[0046] Figure 2 Longitudinal bridge vertical elevation view of the multi-point synchronous jacking device in the embodiment of the present application;

[0047] Figure 3 Transverse bridge vertical elevation view of the multi-point synchronous jacking device in the embodiment of the present application;

[0048] Figure 4 Longitudinal bridge vertical plan view of the multi-point synchronous jacking device in the embodiment of the present application;

[0049] Figure 5 Elevation view of the sliding block, deviation correction mechanism and slide beam in the embodiment of the present application;

[0050] Figure 6 Three-dimensional view of the sliding block, deviation correction mechanism and slide beam in the embodiment of the present application;

[0051] Figure 7 Three-dimensional quarter section view of the sliding block, deviation correction mechanism and slide beam in the embodiment of the present application;

[0052] Figure 8The overall architecture of the steel truss beam self-adaptive intelligent jacking monitoring system in the embodiment of the present application;

[0053] Figure 9 The adaptive intelligent jacking technical route in the embodiment of the present application;

[0054] Figure 10 The laser range finder installation schematic in the embodiment of the present application;

[0055] Figure 11 The steel truss beam plane offset monitoring technical route map in the embodiment of the present application;

[0056] Figure 12 The steel truss beam intelligent deviation correction technical route map in the embodiment of the present application;

[0057] Figure 13 The Beidou positioning device installation position schematic for jacking displacement monitoring in the embodiment of the present application;

[0058] Figure 14 The jacking displacement monitoring technical route map in the embodiment of the present application;

[0059] Figure 15 The steel truss beam jacking progress visualization "modulus driving" principle diagram in the embodiment of the present application;

[0060] Figure 16 The jack intelligent supervision technical route map in the embodiment of the present application.

[0061] In the figure: 1, slide beam; 2, sliding block; 3, vertical jack; 4, horizontal jack; 41, horizontal jack counterforce seat; 5, deviation correction mechanism; 51, transverse jack; 52, roller; 6, pier-side bracket; 7, bridge pier; 8, support bracket; 81, horizontal jack support; 9, steel strand; 10, steel truss beam; 11, steel guide beam; 12, vertical rod; 13, laser range finder; 14, Beidou positioning device. DETAILED DESCRIPTION

[0062] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0063] First, some technical terms in the present application are explained and described to facilitate understanding of the present application by those skilled in the art.

[0064] In one aspect, the present application provides a steel truss adaptive intelligent jacking method, comprising the following steps:

[0065] As shown in the figure, the steel truss adaptive intelligent jacking method is realized by using the following multi-point synchronous jacking device, which comprises a sliding beam 1, a sliding block 2, a vertical jack 3, a horizontal jack 4 and a deviation rectification mechanism 5. Figures 2 to 7 The sliding beam 1 is laid on a platform composed of a pier-side bracket 6 and a pier 7, the horizontal jack 4 is arranged on the front side of the jacking direction, a support bracket 8 is arranged on the front side of the jacking direction of the pier 7, a horizontal jack support 81 is arranged on the support bracket 8 for mounting the horizontal jack 4, and a horizontal jack counterforce seat 41 is arranged between the horizontal jack 4 and the pier 7; the vertical jack 3 is arranged on the rear side of the jacking direction, the sliding block 2 is arranged on the sliding beam 1 and close to the vertical jack 3, and the sliding block 2 is as close as possible to the vertical jack 3, that is, the jack and the sliding block are arranged at the same node position before jacking, the steel truss 10 can be jacked up by the vertical jack 3 to obtain accurate data of the weight of the steel truss 10 borne by the sliding block 2 during jacking.

[0066] The width of the sliding block 2 is greater than the width of the sliding beam 1, and the sliding block 2 is arranged transversely relative to the sliding beam 1, with both ends partially extending out of the sliding beam 1, and the deviation rectification mechanism 5 comprises two groups of transverse jacks 51 arranged below the extended part of the sliding block 2, the two groups of transverse jacks 51 are respectively arranged on both sides of the sliding beam 1 and transversely relative to the sliding beam 1, and are connected with the sliding block 2, the extension end of the transverse jack 51 faces the sliding beam 1, and a roller 52 is arranged at the extension end of the transverse jack 51. The transverse jack 51 is arranged in the special groove of the deviation rectification mechanism 5, the deviation rectification mechanism 5 is connected with the sliding block 2 through bolts, and the deviation rectification mechanism 5 is convenient to assemble and disassemble; when the steel truss 10 is placed on the sliding block 2 of the sliding beam 1 and is not deviated, a gap of 30mm is left between the roller 52 and the sliding beam 1, and after the deviation exceeds 30mm, the roller 52 at the extension end of the transverse jack 51 is abutted against the sliding beam 1 to limit the further transverse deviation of the steel truss 10 during jacking, and the abutment force on the steel truss 10 is adjusted by controlling the extension and retraction of the extension end of the transverse jack 51 to adjust the transverse deviation of the steel truss 10.

[0067] Before jacking the steel truss 10 by a set length, the sliding block 2 is arranged on the sliding beam 1, the steel truss 10 is placed on the sliding block 2, and the horizontal jack 4 and the sliding block 2 are connected by a steel strand 9. In order to avoid the whole bundle of steel strands 9 rotating into a twisted shape due to the rotational force, the whole bundle of steel strands 9 is composed of half left-handed and half right-handed steel strands arranged alternately.

[0068] The set length can be a set panel spacing or any length of the steel strand 9 between the horizontal jack 4 and the sliding block 2.

[0069] The number of longitudinally arranged multi-point synchronous jacking devices is determined according to the jacking position of the steel truss. In this example, the multi-point synchronous jacking devices are arranged at the piers that need to support the jacked steel truss. In other embodiments, the number can also be set according to the stress requirements of the steel truss 10.

[0070] The number of horizontal components is determined based on the number of main trusses in the steel truss beam 10, i.e., the number of sliders 2, vertical jacks 3, horizontal jacks 4, and correction mechanisms 5 in the horizontal direction is set accordingly based on the number of main trusses in the steel truss beam 10.

[0071] After making the above preparations, when using the jacking device to jack the steel truss beam 10 for each set length, the following steps S1-S3 shall be adopted.

[0072] like Figure 1 As shown, S1: The steel truss beam is vertically lifted at each slider to obtain the support reaction force of each slider on the steel truss beam, and then the slider is lowered to make it bear the steel truss beam.

[0073] In this example, vertical jack 3 is first used for vertical synchronous lifting to obtain the support reaction force at each support point of vertical jack 3. Since slider 2 is set as close as possible to vertical jack 3, the support reaction force of vertical jack 3 is the weight of steel truss 10 borne by slider 2. This process is defined as the weighing of steel truss 10.

[0074] S2: Based on the support reaction force and the preset friction coefficient, limit the range of longitudinal horizontal force for the test push, and gradually increase the longitudinal horizontal force on the steel truss beam within the range of longitudinal horizontal force for the test push until the steel truss beam moves, and obtain the set value of the longitudinal horizontal force.

[0075] Since the frictional force between the slider 2 and the slide beam 1 is difficult to determine, the longitudinal horizontal force that causes the steel truss beam 10 to move cannot be directly obtained. The longitudinal horizontal force that causes the steel truss beam 10 to move needs to be obtained through the following method.

[0076] like Figure 9 As shown, step S2 specifically includes:

[0077] S21: Based on the reaction forces of each support and the preset friction coefficient, obtain the initial longitudinal horizontal force corresponding to each slider.

[0078] First, assuming a preset friction coefficient (e.g., 0.1), the initial longitudinal horizontal force at each slider's two horizontal jacks is obtained according to the formula: friction force = contact pressure × friction coefficient. This force is then transmitted to the jacking control module that controls the jacks. At this time, the horizontal jacking mode is force control with displacement assistance.

[0079] S22: Within the range of an initial longitudinal horizontal force less than or equal to, gradually increase the longitudinal horizontal force on the slider to perform a trial push.

[0080] Specifically, the longitudinal horizontal force is gradually increased by the horizontal jack 4 to pull the sliding block 2 through the steel strand 9 at a proportion of the initial longitudinal horizontal force (30%, 50%, 70%, 80%, 85%, 90%, 95%, 100%), and the steel truss 10 is subjected to the incremental launching.

[0081] S23: If the sliding block moves, the longitudinal horizontal force when the sliding block moves is taken as the longitudinal horizontal force setting value.

[0082] When the longitudinal horizontal force of the horizontal jack 4 is gradually increased to launch the steel truss 10, if the sliding block 2 moves, the longitudinal horizontal force when the sliding block 2 moves is taken as the longitudinal horizontal force setting value.

[0083] S24: If the longitudinal horizontal force reaches the initial longitudinal horizontal force and the sliding block has not moved, the initial horizontal thrust is updated after increasing the preset friction coefficient, and the launching process of the sliding block is repeated until the sliding block moves. The longitudinal horizontal force when the sliding block moves is taken as the longitudinal horizontal force setting value.

[0084] If the horizontal jack 4 is loaded to the initial longitudinal horizontal force, the steel truss 10 is not pushed (judged by the stroke monitoring data at the horizontal jack 4), and the launching control module obtains feedback information that the steel truss 10 is not pushed. Then, the assumed preset friction coefficient (for example, 0.11) is increased, and the above operation is repeated until the steel truss 10 and the sliding block 2 start to move, and the horizontal launching mode is automatically switched to displacement control with force assistance.

[0085] S3: Continue to move the steel truss and set the longitudinal horizontal force alarm range based on the longitudinal horizontal force setting value, monitor the longitudinal horizontal force of the steel truss until the steel truss is moved to the set position at the set speed.

[0086] Preferably, based on the longitudinal horizontal force setting value, the longitudinal horizontal force alarm range is set, and the longitudinal horizontal force of the steel truss is monitored, including:

[0087] A1: During the movement of the steel truss, the longitudinal horizontal force applied to the steel truss is acquired in real time.

[0088] In this example, during the launching of the steel truss 10, the longitudinal horizontal force applied to the steel truss 10 is acquired in real time by acquiring the tension of the horizontal jack 4.

[0089] B1: Determine whether the longitudinal horizontal force applied to the steel truss is within the longitudinal horizontal force alarm range, if not, output an alarm signal and stop launching.

[0090] The longitudinal horizontal force set value capable of moving the steel truss 10 is obtained through the S2 step. The steel truss 10 needs different longitudinal horizontal forces in the moving process due to different positions and postures, but the longitudinal horizontal force is too large, which may be caused by other abnormal factors. In the scheme, based on the longitudinal horizontal force set value, a longitudinal horizontal force alarm range can be set, for example, the longitudinal horizontal force set value is [0, 1.25], if the longitudinal horizontal force exceeds the above range, the system automatically alarms and the jacking is paused to ensure the safety of the whole jacking process.

[0091] As shown in Figure 12 in some optional embodiments, in the process of moving the steel truss, if the lateral deviation of the steel truss in the moving direction exceeds the displacement limit, the deviation correction device arranged on both sides of the sliding block is controlled to correct the lateral position of the steel truss according to the lateral deviation.

[0092] Specifically, in this embodiment, first, it is judged whether the steel truss 10 is in the moving jacking.

[0093] A2: Obtain the lateral deviation monitoring data of the steel truss by the laser range finder 13 arranged on both sides of at least two piers of the steel truss.

[0094] As shown in Figure 10 in this example, laser range finders 13 are arranged on both sides of the steel truss 10 in the transverse direction of the bridge, and the measurement accuracy error of the laser range finder 13 is not more than 1mm; since the monitoring distance change amount of the two laser range finders 13 is just opposite in sign, the deviation monitoring error caused by the thickness change of the lower chord of the steel truss 10 can be avoided by subtracting the average value of the monitoring distance change amount of the two laser range finders 13. The laser range finder 13 is installed on the vertical rod 12, and attention is paid to the irradiation direction of the laser range finder 13 being perpendicular to the surface of the lower chord of the steel truss 10, and the height is ensured to be irradiated on the vertical middle position of the lower chord of the steel truss 10. The vertical rod 12 is made of an I-shaped steel with large rigidity and is bound and fixed on the railing for easy disassembly. As shown in Figure 11 by arranging laser range finders 13 on two piers 7 of the steel truss 10 (when the length of the jacked steel truss is short) or multiple piers 7 (when the length of the jacked steel truss is long), the planar deviation of the steel truss 10 is monitored in real time.

[0095] B2: According to the lateral deviation monitoring data, the straight line equation of the central axis of the current steel truss is calculated.

[0096] Specifically, the bridge axis coordinate system is established, and the straight line equation of the central axis of the steel truss 10 after planar deviation is calculated according to the deviation data of the cross section of the steel truss 10 at the two piers 7, or the straight line equation of the central axis of the steel truss 10 after planar deviation is obtained by regression according to the deviation data of the cross section of the steel truss 10 at the multiple piers 7.

[0097] C2: determining the lateral deviation value of the steel truss at the position of each pier according to the central axis linear equation.

[0098] Specifically, according to the central axis linear equation of the steel truss 10 after the planar deviation, the planar deviation value of the steel truss 10 at the position of each pier 7 can be obtained and transmitted to the intelligent correction system to realize intelligent correction.

[0099] D2: when the lateral deviation value exceeds the preset deviation limit value and the jacking speed of the steel truss is greater than zero, the lateral position of the steel truss is dynamically corrected according to the lateral deviation value by the correction device arranged on both sides of the slider.

[0100] Specifically, as shown in Figure 12 , the intelligent correction module obtains the planar deviation data of the steel truss 10 at the pier 7, and then determines whether the deviation limit value is exceeded. If the limit is exceeded, the dynamic correction is performed in stages.

[0101] The steel truss self-adaptive intelligent jacking method further comprises:

[0102] A3: during the jacking process, the displacement monitoring data of the jacked steel truss is obtained in real time.

[0103] As shown in Figure 13 , in this example, the displacement coordinate data of the steel truss is obtained by the positioning device, specifically, the Beidou positioning device 14 is used. The Beidou positioning device 14 is installed at the connection area between the steel guide beam 11 and the steel truss 10, and is used to monitor the real-time displacement data during the jacking process. As shown in Figure 14 , specifically, the real-time monitoring data of the Beidou positioning device 14 is transmitted to the server through the TCP protocol, the initial latitude and longitude before the jacking is monitored by the Beidou positioning device 14, and the jacking displacement of the steel truss 10 is obtained by processing the real-time latitude and longitude monitored by the Beidou positioning device 14 and the initial latitude and longitude using a special code for converting the distance between two points. The jacking displacement of the steel truss 10 is transmitted to the data acquisition module of the cloud monitoring platform, and the cloud monitoring platform provides the steel truss 10 jacking displacement data interface required for front-end development.

[0104] B3: according to the displacement monitoring data, the current construction progress of the steel truss is continuously updated and visualized by establishing the BIM model of the steel truss and the steel guide beam.

[0105] In this example, as shown in Figure 15 , based on the "modular driving" principle, the jacking displacement of the steel truss is monitored to drive the model change in real time to synchronize the site jacking progress, and the progress visualization is realized.

[0106] Preferably, step B3 comprises the following steps:

[0107] B31: the BIM model of the established steel truss girder and steel guide beam, wherein the steel truss girder in the BIM model is located at the erected position and is fixed, and is decomposed into standard blocks of a set number of segments, and the steel guide beam is controlled to move through displacement monitoring data.

[0108] In this example, the BIM model is established as a full-scene BIM model for construction, including a virtual construction environment of the bridge main structure, the incremental launching temporary building structure and the terrain environment.

[0109] B32: before the incremental launching construction of the steel truss girder, all the standard blocks of the steel truss girder are hidden.

[0110] At this time, all the standard blocks are located at the erected position, but are not displayed.

[0111] B33: in the incremental launching construction step, when the steel truss girder moves by a set interval, the steel guide beam in the BIM model is controlled to move through displacement monitoring data, when the displacement monitoring data increases by a set interval, a standard block in front of the steel truss girder in the moving direction in the BIM model is switched from the hidden state to the displayed state, and a standard block behind the steel truss girder is switched from the displayed state to the hidden state.

[0112] In the steel truss girder assembly construction step, after one segment interval of the steel truss girder is assembled, the standard block behind the steel truss girder in the BIM model after the last incremental launching is displayed again. Through the above method, the visualization of the incremental launching process of the steel truss girder 10 is realized.

[0113] As shown in Figure 1 and Figure 8 Before the incremental launching, the jacks and the sliding blocks are arranged at the same node position to realize a more accurate steel truss girder weighing process: the jacks arranged at the same node position as the sliding blocks vertically jack up the steel truss girder to obtain the reaction force of the sliding blocks on the steel truss girder, the accurate weight of the steel truss girder is obtained through the reaction force, the longitudinal horizontal force range of the test launching is limited through the preset friction coefficient and based on the reaction force, the longitudinal horizontal force of the steel truss girder is gradually increased in the test longitudinal horizontal force range until the steel truss girder moves to obtain the longitudinal horizontal force set value, the longitudinal horizontal force set value obtained in this way is more accurate, when the steel truss girder continues to move, the longitudinal horizontal force alarm range set based on the longitudinal horizontal force set value is also more accurate, and the longitudinal horizontal force of the steel truss girder is monitored based on the longitudinal horizontal force alarm range, which makes the whole incremental launching process safer.

[0114] In addition, in the trial jacking process, the steel truss cannot be moved within the range of the trial jacking longitudinal horizontal force, and the trial jacking and the iteration of the friction coefficient are performed until the steel truss jacking sliding movement is achieved; the longitudinal horizontal force of the horizontal jack is obtained after the steel truss jacking sliding movement, and the longitudinal horizontal force is used to set the jacking force adjustment range of the self-adaptive jacking of each horizontal jack according to the friction force change in the jacking sliding process, i.e. the longitudinal horizontal force alarm range, thereby realizing the function target of "one-key jacking" and comprehensively improving the control precision and the automation level of the existing jacking construction.

[0115] In addition, the method also analyzes the construction efficiency according to the displacement monitoring data of the jacking steel truss. Specifically, the construction step (assembling or jacking) is determined by the jacking displacement of the steel truss 10, and the initial time when the steel truss enters each construction step is intelligently recorded. For example, the start time, end time and duration of the construction step are obtained. According to the duration and the assembling length or jacking distance of the steel truss in each construction step, the average construction efficiency of the construction step can be obtained.

[0116] The method also pushes the construction progress according to the displacement monitoring data of the jacking steel truss. Specifically, according to the jacking displacement, the current construction step and the total jacking distance can be obtained, and each jacking condition can be determined. The jacking distance of the current round, the jacking end time of the upper span distance, the jacking end time of the current span distance, and the jacking efficiency (including the time of changing the sliding block) can also be obtained. In each jacking condition, the maximum value of the total jacking force of the steel truss 10 is intelligently recorded, which is approximately equal to the actual weight of the steel truss 10. The theoretical weight of the steel truss 10 is obtained by an electronic table calculation of the theoretical jacking force in different conditions. The jacking progress of the steel truss 10 is pushed, and WeChat public number is used as a mobile terminal to accept information platform. Every time the steel truss jacks 1 span distance, the current construction step, the total jacking distance, the jacking distance of the current round, the jacking end time of the upper span distance, the jacking end time of the current span distance, the jacking efficiency, the theoretical weight, the ratio of the actual weight to the theoretical weight, and other information are pushed on the WeChat public number.

[0117] The method also monitors the friction coefficient according to the support reaction force obtained by using the vertical jack in step S1 and the real-time jacking force applied by the horizontal jack. Specifically, in the jacking construction step, the total jacking force, i.e. the tension of the horizontal jack, is calculated in real time, the friction coefficient is calculated in real time by using the formula friction coefficient = total jacking force / total jacking force maximum value, and the over-limit warning is set. Optionally, the warning value can be set to 0.1, and the total jacking force is the jacking force of all vertical jacks.

[0118] The method also intelligently supervises the jacks, which specifically includes three parts: jack data monitoring, vertical jack theoretical jacking force intelligent pushing, and vertical jack actual jacking force intelligent monitoring.

[0119] As Figure 16As shown, the jack data monitoring specifically includes: the jack force and stroke data are transmitted by the jack control system to the server through the MQTT protocol, and then transmitted to the cloud monitoring platform; on the one hand, all jack force and stroke data are displayed in groups on the system board, and on the other hand, the stroke synchronization and force deviation of each group of jack in the transverse bridge direction are monitored, and a warning value is set. Optionally, the stroke synchronization warning value of each group of jack in the transverse bridge direction: the horizontal jack takes 20mm, and the vertical jack takes 10mm; the force deviation warning value of each group of jack in the transverse bridge direction: the horizontal jack takes 20%, and the vertical jack takes 5%.

[0120] The intelligent pushing of the vertical jack theoretical jacking force is that the BIM information platform collects the theoretical jacking force of the vertical jack in each construction step of the jacking construction into an electronic table. Considering the need to modify the theoretical vertical jacking force before each jacking according to the monitoring instructions of the monitoring unit (considering temporary load, etc.), the BIM information platform has the function of one-key modification of the theoretical vertical jacking force. According to the displacement of the jacking monitoring, it is determined which working condition the jacking construction reaches, and the theoretical jacking force of the vertical jack under the working condition is automatically pushed to the jack control system.

[0121] The intelligent monitoring of the actual jacking force of the vertical jack is that the actual jacking force of the vertical jack is compared with the theoretical jacking force for monitoring, and an over-limit warning is set. The warning value can be 1.15 times of the theoretical jacking force.

[0122] The method also performs structural stress monitoring, including stress monitoring of the steel truss beam 10 and the steel guide beam 11, pier top displacement monitoring of the pier 7, etc. The stress monitoring refers to obtaining the strain value through the vibrating wire strain gauge installed at the key stress position of the steel truss beam 11 and the steel guide beam 15, and performing automatic monitoring through the Internet of Things, and setting an over-limit warning; the warning value is 0.8 times of the corresponding design steel stress limit value. The pier top displacement monitoring is performed by installing an inclinometer at a suitable position on the pier top of the pier 7 to obtain the inclination, and performing automatic monitoring through the Internet of Things, and converting the angle into the pier top displacement through the mechanical theory, and setting an over-limit warning; the warning value is 0.8 times of the pier top displacement corresponding to the pier cracking.

[0123] The method also performs environmental monitoring by arranging a micro-meteorological station near the steel truss beam 10 bridge site, including monitoring of meteorological parameters such as temperature, humidity, wind speed and wind direction, and performing automatic monitoring through the Internet of Things, and setting a warning for the wind speed monitoring, and pushing the wind force information of 6 levels and above to the project WeChat public number to guide the construction.

[0124] As shown in Figure 8 On the other hand, the present application also provides a steel truss beam self-adaptive intelligent jacking monitoring system, which comprises a data acquisition module and a jacking control module.

[0125] The data acquisition module is configured to acquire the support reaction force of the steel truss beam by each sliding block and to enable the sliding block to bear the steel truss beam; and the incremental launching control module is configured to limit the range of the test longitudinal horizontal force according to the support reaction force and a preset friction coefficient, to gradually increase the longitudinal horizontal force on the steel truss beam within the range of the test longitudinal horizontal force until the steel truss beam moves, to acquire a longitudinal horizontal force setting value, to continue to move the steel truss beam, and to set a longitudinal horizontal force alarm range based on the longitudinal horizontal force setting value, so as to monitor the longitudinal horizontal force on the steel truss beam until the steel truss beam moves to the set position at the set speed.

[0126] The present scheme acquires the support reaction force of the steel truss beam by each sliding block, acquires the accurate weight of the steel truss beam through the support reaction force, limits the range of the test longitudinal horizontal force based on the support reaction force and the preset friction force, gradually increases the longitudinal horizontal force on the steel truss beam within the range of the test longitudinal horizontal force until the steel truss beam moves, acquires the longitudinal horizontal force setting value, and continues to move the steel truss beam based on the longitudinal horizontal force setting value to set the longitudinal horizontal force alarm range, so as to monitor the longitudinal horizontal force on the steel truss beam based on the longitudinal horizontal force alarm range, which makes the whole incremental launching process safer. The theoretical incremental launching force in the prior art is set according to experience, and the incremental launching parameters in the incremental launching process are also manually set according to experience, which has low intelligence and low efficiency, and the experience value may be wrong in special environment. The incremental launching force acquisition manner in the present scheme is more scientific, and the possibility of causing safety risks is reduced.

[0127] Preferably, the steel truss beam self-adaptive intelligent incremental launching monitoring system further comprises an intelligent deviation correction module and a construction progress monitoring module.

[0128] The intelligent deviation correction module is configured to, in the process of moving the steel truss beam, if the lateral deviation of the steel truss beam in the moving direction exceeds the displacement limit, control the deviation correction device arranged on both sides of the sliding block to correct the lateral position of the steel truss beam according to the lateral deviation.

[0129] The construction progress monitoring module is configured to continuously update and visually display the current construction progress of the steel truss beam according to the displacement monitoring data and the established BIM model of the steel truss beam and the steel guide beam.

[0130] The steel truss beam self-adaptive intelligent incremental launching monitoring system further comprises a jack intelligent monitoring module and a structure stress monitoring module.

[0131] The jack intelligent monitoring module is configured to monitor and display the real-time data of each jack and to perform early warning according to the corresponding set stroke and / or incremental launching force early warning value.

[0132] The structure stress monitoring module is configured to monitor and display the stress of the key stress positions of the steel truss girder and the steel guide beam, and to give a warning according to the corresponding set stress warning value.

[0133] The friction coefficient monitoring module is further included and is configured to monitor the friction coefficient according to the support reaction force obtained by the vertical jack and the real-time jacking force applied by the horizontal jack.

[0134] The environment monitoring module is further included and is configured to monitor the meteorological parameters such as temperature, humidity, wind speed and wind direction by arranging a micro-meteorological station near the steel truss girder bridge site, to automatically monitor through the Internet of Things, and to set a warning for the wind speed monitoring.

[0135] The jacking control module, the intelligent deviation correction module, the construction progress monitoring module, the jack intelligent supervision module, the structure stress monitoring module, the friction coefficient monitoring module and the environment monitoring module in the monitoring system correspond to the steps in the steel truss girder adaptive intelligent jacking method described above, and their functions and implementation processes will not be described here. The seven modules of intelligent adaptive jacking control, intelligent deviation correction, intelligent progress management, friction coefficient monitoring, jack intelligent supervision, structure stress monitoring and environment monitoring are integrated, and the functional target of "one-key jacking, digital driving, digital twin and intelligent warning" is achieved.

[0136] It should be noted that the above sequence numbers of the embodiments of the application are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0137] The terms "comprising" and "having" and any variations thereof in the specification and claims of the present application and the above drawings are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product or device. The terms "first", "second" and "third" and the like descriptions are used to distinguish different objects, and do not represent the order or limit the types of "first", "second" and "third".

[0138] In the description of the embodiments of the present application, "exemplary", "for example" or "for instance" is used to mean as an example, illustration or description. Any embodiment or design scheme described as "exemplary", "for example" or "for instance" in the embodiments of the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. On the contrary, the words "exemplary", "for example" or "for instance" are intended to present the relevant concept in a specific manner.

[0139] In the description of the embodiments of the present application, unless otherwise specified, " / " means the meaning of or, for example, A / B can mean A or B; the text "and / or" only describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent: A exists alone, A and B exist together, and B exists alone, and in addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0140] In some of the processes described in the embodiments of the present application, a plurality of operations or steps are included in a specific order, but it should be understood that these operations or steps can be executed or in parallel without the order in which they appear in the embodiments of the present application, and the serial number of the operation is only used to distinguish different operations, and the serial number itself does not represent any execution order. In addition, these processes can include more or fewer operations, and these operations or steps can be executed in sequence or in parallel, and these operations or steps can be combined.

[0141] From the above description of the embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment method can be realized by means of software and the necessary general hardware platform, of course, it can also be realized by hardware, but in many cases the former is a better embodiment. Based on such understanding, the technical solutions of the present application can be embodied in the form of a software product, which is stored in a storage medium (such as a ROM / RAM, a magnetic disk, an optical disk) as described above, and includes a plurality of instructions for making a terminal device execute the method described in each embodiment of the present application.

[0142] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A steel truss beam adaptive intelligent jacking method, characterized in that, The method comprises the following steps: Obtaining the support reaction force of each sliding block on the steel truss by vertically jacking the steel truss with the jack arranged at the same node position as the sliding block before pushing, and making the sliding block bear the steel truss by falling the jack; According to the support reaction force and the preset friction coefficient, the longitudinal horizontal force range is limited, and the longitudinal horizontal force on the steel truss is gradually increased in the longitudinal horizontal force range until the steel truss moves, and the longitudinal horizontal force setting value is obtained, comprising: According to the support reaction force and the preset friction coefficient, the initial longitudinal horizontal force corresponding to each sliding block is obtained; In the range of the initial longitudinal horizontal force, the longitudinal horizontal force of the sliding block is gradually increased, and the sliding block is subjected to trial pushing; If the sliding block moves, the longitudinal horizontal force when the sliding block moves is taken as the longitudinal horizontal force setting value; If the sliding block does not move when the longitudinal horizontal force reaches the initial longitudinal horizontal force, the initial horizontal pushing force is updated after increasing the preset friction coefficient, and the trial pushing process of the sliding block is repeated until the sliding block moves, and the longitudinal horizontal force when the sliding block moves is taken as the longitudinal horizontal force setting value; Continue to move the steel truss, and set the longitudinal horizontal force alarm range based on the longitudinal horizontal force setting value to monitor the longitudinal horizontal force of the steel truss until the steel truss moves to the set position at the set speed; the longitudinal horizontal force alarm range is set based on the longitudinal horizontal force setting value to monitor the longitudinal horizontal force of the steel truss, comprising: In the process of moving the steel truss, the longitudinal horizontal force applied to the steel truss is obtained in real time; If the longitudinal horizontal force applied to the steel truss is not in the longitudinal horizontal force alarm range, an alarm signal is output and the pushing is stopped.

2. The self-adaptive intelligent pushing method for steel truss girder according to claim 1, characterized in that: In the process of moving the steel truss, if the lateral deviation of the steel truss in the moving direction exceeds the displacement limit, the lateral position correction device arranged on both sides of the sliding block is controlled to correct the lateral position of the steel truss according to the lateral deviation.

3. The self-adaptive intelligent launching method of steel truss girder according to claim 2, characterized in that, The lateral deviation of the steel truss in the moving direction exceeds the displacement limit, and the lateral position correction device arranged on both sides of the sliding block is controlled to correct the lateral position of the steel truss according to the lateral deviation, comprising: Obtaining the lateral deviation monitoring data of the steel truss from the laser range finder arranged on both sides of at least two piers of the steel truss; According to the lateral deviation monitoring data, the straight line equation of the central axis of the steel truss is calculated; According to the straight line equation of the central axis, the lateral deviation value of the steel truss at the position of each pier is determined; When the lateral deviation value exceeds the preset deviation limit value and the pushing speed of the steel truss is greater than zero, the lateral position of the steel truss is dynamically corrected by the lateral deviation value.

4. The self-adaptive intelligent launching method of steel truss girder according to claim 1, characterized in that, Further comprising: In the process of pushing, the displacement monitoring data of the steel truss is obtained in real time; According to the displacement monitoring data, the current construction progress of the steel truss is continuously updated and visually displayed through the established BIM model of the steel truss and the steel guide beam.

5. The self-adaptive intelligent launching method of steel truss girder according to claim 4, characterized in that, The current construction progress of the steel truss is continuously updated and visually displayed according to the displacement monitoring data through the established BIM model of the steel truss and the steel guide beam, including: The BIM model of the steel truss and the steel guide beam is established, wherein the steel truss in the BIM model is located at the erected position and is fixed, and is divided into standard blocks of a set number of segments, and the steel guide beam is controlled to move through the displacement monitoring data; Before the steel truss is pushed, all the standard blocks of the steel truss are hidden; In the pushing construction step, the steel guide beam in the BIM model is moved through the displacement monitoring data when the steel truss moves by a set interval, and when the displacement monitoring data increases by a set interval, a standard block in front of the steel truss in the BIM model is converted from a hidden state to a displayed state, and a standard block behind the steel truss is converted from a displayed state to a hidden state.

6. A steel truss adaptive intelligent jacking monitoring system, characterized in that, It includes: A data acquisition module is used to acquire the reaction force of each sliding block on the steel truss when the steel truss is vertically jacked by the jack arranged at the same node position in front of the pushing and the sliding block; A pushing control module is used to limit the trial pushing longitudinal horizontal force range according to the reaction force and a preset friction coefficient, and gradually increase the longitudinal horizontal force on the steel truss within the trial pushing longitudinal horizontal force range until the steel truss moves, and acquire a longitudinal horizontal force set value; continue to move the steel truss, and set a longitudinal horizontal force alarm range based on the longitudinal horizontal force set value, monitor the longitudinal horizontal force of the steel truss, and move the steel truss to a set position at a set speed.

7. The self-adapting intelligent jacking monitoring system for steel truss girder according to claim 6, wherein, It also includes an intelligent correction module and a construction progress monitoring module; The intelligent correction module is used to correct the lateral position of the steel truss if the lateral deviation of the steel truss in the moving direction exceeds the displacement limit during the movement of the steel truss, and control the correction device arranged on both sides of the sliding block to correct the lateral position of the steel truss according to the lateral deviation; The construction progress monitoring module is used to continuously update and visually display the current construction progress of the steel truss according to the displacement monitoring data through the established BIM model of the steel truss and the steel guide beam.

8. The self-adapting intelligent jacking monitoring system for steel truss girder as claimed in claim 6, wherein, It also includes a jack intelligent supervision module and a structure stress monitoring module; The jack intelligent supervision module is used to monitor and display the real-time data of each jack, and give an early warning according to the corresponding set stroke and / or jacking force early warning value; The structure stress monitoring module is used to monitor and display the stress of the key stress position of the steel truss and the steel guide beam, and give an early warning according to the corresponding set stress early warning value.

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