Suspended pouring rotation-pushing-folding multi-time system switching control system and method

Abstract

The invention discloses a control system and method for switching of a suspended pouring rotation-pushing-closing multi-time system, and relates to the technical field of bridge construction. The detection module is used for building a pouring bracket, pre-burying a base and a sensor module, arranging a total station and the rotating module at a closure section, acquiring displacement data by utilizing the sensor module, acquiring an eccentric distance according to the displacement data, and carrying out counterweight; the pouring pushing module is used for calculating a pouring prediction position, pouring concrete to a corresponding position by traction equipment, judging side pressure and pouring height, stopping pouring when the pouring height reaches a preset value, and controlling sliding driving equipment to move the steel beam after cooling; and the folding module is used for folding after the steel beams reach preset positions, judging whether folding axes deviate or not, if not, welding gaps between the steel beams, and if yes, adjusting the positions of the steel beams. According to the invention, the construction time can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and in particular to a control system and method for multiple system conversions of suspended casting, rotation, jacking and closing. Background Art

[0002] The continuous beam is an ancient structural system with the advantages of small deformation, good structural rigidity, smooth and comfortable driving, few expansion joints, simple maintenance, and strong earthquake resistance. The internal force and line shape of the prestressed concrete continuous beam will continue to change with the progress of construction. Before the construction officially starts, although the ideal elevation and internal force values ​​of each construction stage can be obtained through theoretical analysis, the actual construction may be disturbed by various factors, which may cause the line shape and internal force state of the completed bridge to deviate from the design requirements, and even make it difficult to close, which will have different degrees of impact on the safety, appearance, reliability, driving conditions and economy of the bridge construction.

[0003] Therefore, it is an urgent problem for technical personnel in this field to propose a control system and method for multiple system conversions of suspended casting rotation-pushing-closing to solve the problems of high pressure on construction period and waste of resources caused by separate control of construction process in the existing technology. Summary of the invention

[0004] In view of this, the present invention provides a suspended casting rotation-pushing-closing multiple system conversion control system and method, which can achieve the effect of reducing the construction time.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a suspended casting rotation-pushing-closing multiple system conversion control system, including a detection module, a rotation module, a casting pushing module and a closing module:

[0006] Detection module: build the casting support and embedded base, arrange the total station in the closing section, and install the sensor module after the casting support and embedded base are completed;

[0007] The rotating module is connected to the first output terminal of the detection module, and uses the sensor module to obtain displacement data, obtains the eccentricity according to the displacement data, and performs counterweighting;

[0008] The pouring push module is connected to the output end of the rotating module and the second output end of the detection module respectively, calculates the predicted pouring position, and the traction equipment pours the concrete to the corresponding position, determines the side pressure and pouring height, stops pouring when the pouring height reaches the preset value, and controls the sliding drive device to move the steel beam after cooling;

[0009] The closing module is connected to the output end of the pouring and pushing module and the third output end of the detection module respectively. After the steel beam reaches the preset position, it is closed to determine whether the closing axis is deviated. If not, the gap between the steel beams is welded. If so, the position of the steel beam is adjusted.

[0010] The present invention also discloses a method for controlling a multiple system conversion of a suspended casting rotating body, a top push, and a closing body, which is executed in a multiple system conversion control system of a suspended casting rotating body, a top push, and a closing body, and comprises the following steps:

[0011] S1. Build the casting support and embedded base. The bridge is divided into cantilever section and closing section. The total station is set up in the closing section.

[0012] S2. After the pouring bracket and embedded base are erected, the sensor module is installed;

[0013] S3, using the sensor module to obtain displacement data, obtaining the eccentricity according to the displacement data, and performing counterweighting;

[0014] S4, calculate the predicted pouring position, use the traction equipment to pour the concrete to the corresponding position, and determine the side pressure and pouring height;

[0015] S5. When the pouring height reaches the preset value, the pouring is stopped. After cooling, the sliding drive device is controlled to move the steel beam. When the steel beam reaches the preset position, it is closed.

[0016] S6. Determine whether the closing axis is deviated. If not, weld the gap between the steel beams. If so, adjust the position of the steel beams.

[0017] In the above method, optionally, the sensor module in S2 includes but is not limited to an infrared distance sensor, an inclination sensor, a displacement sensor, a strain gauge resistor sensor, a strain gauge sensor and a stress sensor.

[0018] The above method may optionally include obtaining the eccentricity in S3 based on the fact that the friction torque of the ball joint is greater than the unbalanced torque of the rotating body and the fact that the friction torque of the ball joint is less than the unbalanced torque of the rotating body.

[0019] In the above method, optionally, in S3, the counterweight is completed, and the rotating module controls the traction system and the auxiliary system to perform a trial rotation.

[0020] In the above method, optionally, controlling the slip drive device in S5 includes controlling the drive using a hydraulic slip system.

[0021] In the above method, optionally, the closing in S5 includes welding the rigid skeleton and tensioning temporary prestressed tendons.

[0022] It can be seen from the above technical solution that, compared with the prior art, the present invention provides a suspended cast-rotation-pushing-closing multiple system conversion control system and method, which has the following beneficial effects: 1) The present invention takes a short construction time, ensures the track laying period, and has adjustment space on the construction site; 2) The present invention adopts segmented processing to meet the requirements of in-factory processing and on-site equipment lifting capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0024] Figure 1 A block diagram of a suspended casting rotation-pushing-closing multiple system conversion control system disclosed in the present invention;

[0025] Figure 2 The present invention discloses a flow chart of a method for controlling the conversion of multiple systems of suspended casting, rotation, pushing and closing. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In this application, relational terms such as first and second, etc. are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "comprise one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0028] Reference Figure 1 As shown, the present invention discloses a suspended casting rotation-pushing-closing multiple system conversion control system, including a detection module, a rotation module, a casting and pushing module and a closing module:

[0029] Detection module: build the casting support and embedded base, arrange the total station in the closing section, and install the sensor module after the casting support and embedded base are completed;

[0030] The rotating module is connected to the first output terminal of the detection module, and uses the sensor module to obtain displacement data, obtains the eccentricity according to the displacement data, and performs counterweighting;

[0031] The pouring push module is connected to the output end of the rotating module and the second output end of the detection module respectively, calculates the predicted pouring position, and the traction equipment pours the concrete to the corresponding position, determines the side pressure and pouring height, stops pouring when the pouring height reaches the preset value, and controls the sliding drive device to move the steel beam after cooling;

[0032] The closing module is connected to the output end of the pouring and pushing module and the third output end of the detection module respectively. After the steel beam reaches the preset position, it is closed to determine whether the closing axis is deviated. If not, the gap between the steel beams is welded. If so, the position of the steel beam is adjusted.

[0033] Reference Figure 2 As shown, the present invention discloses a method for controlling a multiple system conversion of a suspended cast rotating body, a top push, and a closing, which is executed in a multiple system conversion control system of a suspended cast rotating body, a top push, and a closing, and includes the following steps:

[0034] S1. Build the casting support and embedded base, and lay out the total station in the closing section;

[0035] S2. After the pouring support and embedded base are erected, the sensor module is installed to detect the elastic deformation and support stress;

[0036] S3, obtaining displacement data according to the detection signal of the sensor module, obtaining the eccentricity according to the displacement data, and performing counterweighting;

[0037] S4, calculate the predicted pouring position, use the traction equipment to pour the concrete to the corresponding position, and determine the side pressure and pouring height;

[0038] S5. When the pouring height reaches the preset value, the pouring is stopped. After cooling, the sliding drive device is controlled to move the steel beam. When the steel beam reaches the preset position, it is closed.

[0039] S6. Determine whether the closing gap is smaller than a preset value.

[0040] Furthermore, the sensor module in S2 includes but is not limited to an infrared image sensor, an infrared ranging sensor, an inclination sensor, a displacement sensor, a strain gauge sensor, a strain gauge sensor and a stress sensor.

[0041] Specifically, it also includes installing a total station on the ground of the closing section to detect the angle of the steel beam of the closing section.

[0042] Furthermore, when constructing the casting bracket and the embedded base, the construction images are captured by using an infrared image sensor. After the images are obtained and pre-processed, a three-dimensional figure is constructed and compared with the BIM model to determine the construction stage. After the construction is completed, the infrared image sensor is controlled to stop capturing images, the inclination sensor and displacement sensor are activated, and the pressure of the hydraulic jack is recorded.

[0043] Furthermore, S3 includes obtaining the eccentricity according to the fact that the friction torque of the ball joint is greater than the unbalanced torque of the rotating body and the fact that the friction torque of the ball joint is less than the unbalanced torque of the rotating body.

[0044] Specifically, suppose the center of gravity of the rotating body is biased to the north. At this time, the top force P2 can only be applied on the north side. When P2 (starting from the moment the support leg leaves the ground) gradually increases to the moment when the ball joint rotates slightly, we have: P2·L2=M G +M Z When the jack is lifted to the right position (the ball joint rotates slightly), the jack is lowered. Let P'2 be the force when the ball joint rotates slightly during the gradual lowering of the jack. Then: P'2·L2=M G -M Z ,

[0045] The unbalanced moment M can be obtained by combining G and friction torque M Z :

[0046]

[0047] Wherein, L2 is the rotation distance.

[0048] The rotating body ball joint rotates slightly counterclockwise and clockwise in the vertical plane along the beam axis, that is, a vertical rotation of a small angle. Among them, the friction torque is the sum of the torques of the friction force on each micro-area of ​​the friction surface to the vertical normal through the center of the ball joint, that is: dF=μ z PdA,dA=R sinθ·dβ·R·dθ;P 竖 =Pcosθ; that is so: Right now:

[0049] Among them, θ is the vertical plane inclination angle, α is the maximum value of θ, β is the horizontal plane inclination angle; R is the spherical radius of the turntable at the center of the ball joint; N is the weight of the swivel.

[0050] Furthermore, the counterweight is adjusted on site by adding sandbags to adjust the weight at both ends so that the center of gravity of the structure coincides with the center of the rotation axis as much as possible.

[0051] Specifically, the eccentricity of the structure after the counterweight is controlled to be 5 to 10 cm.

[0052] Further, when the counterweight is completed, the terminal controls the traction system and the auxiliary system to conduct a test run.

[0053] Specifically, after the terminal issues a command, the steel strands are controlled to be wound parallel to the upper turntable, and the jacks in the traction system are forced to try to rotate. If it cannot rotate, the auxiliary jacks in the auxiliary system are controlled to exert force at the same time to overcome the static friction resistance to rotate the bridge. At the same time, the infrared ranging sensor is used to measure the rotation distance, the strain type resistance sensor measures the elastic deformation, the stress sensor is used to obtain the structural stress of the key points of the bridge, and the inclination sensor is used to obtain the rotation angle, and then the rotation speed of the swivel is obtained.

[0054] Furthermore, after the control system is tested and run without error, the cantilever beam is cast in a hanging basket, and a sensor group is used for monitoring to ensure that the cantilevers at both ends are as symmetrical and balanced as possible. When the cantilever section reaches the preset length, a slideway is laid on the upper side of the cantilever section to control the sliding drive equipment to transport the closing section.

[0055] Furthermore, controlling the slip drive device in S5 includes controlling the drive using a hydraulic slip system.

[0056] Specifically, the hydraulic sliding system mainly uses hydraulic synchronous sliding technology and adopts a hydraulic crawler as a sliding drive device. The hydraulic crawler is a combined structure, one end of which is connected to the sliding track with a wedge-shaped clamp block, and the other end is connected to the sliding tire frame or component in the form of a hinge point, and a hydraulic cylinder is used in the middle to drive the crawling.

[0057] The wedge-shaped clamp of the hydraulic crawler has a one-way self-locking function. When the oil cylinder extends, the wedge-shaped clamp works (clamps) and automatically locks the sliding track; when the oil cylinder retracts, the clamp does not work (loosens) and moves in the same direction as the oil cylinder.

[0058] The hydraulic sliding synchronous control should meet the following requirements: try to ensure that each hydraulic crawler is evenly loaded and each sliding pushing point remains synchronized.

[0059] Furthermore, the hydraulic sliding system control method includes:

[0060] 1) Set the C-axis crawler as the master point A, and the B / C-axis crawler as the slave point B.

[0061] 2) Set the hydraulic crawler sliding speed of the master command point A to the standard value as the reference for speed and displacement in the synchronous control strategy. Under the control of the computer, the slave command point B tracks and compares the reference point with the displacement to make dynamic adjustments.

[0062] 3) According to the difference in displacement between two points ΔL, the median ΔL / 2 is taken for dynamic adjustment to ensure that each hydraulic crawler always keeps synchronization during the sliding process. The geometric principle of two points determining a straight line ensures the stability of the entire steel truss beam during the entire sliding process.

[0063] Furthermore, the closing in S5 includes welding the rigid skeleton and tensioning the temporary prestressed tendons.

[0064] Specifically, try to choose a time period with low temperature for closing. When closing, reserve adjustment interfaces at both ends, reserve 500mm width for the top plate and the bottom plate as adjustment sections (i.e. 250mm for the steel-concrete section plus 250mm for the steel beam section), and reserve 100mm cutting amount for the two webs of the steel box beam at the interface. After the linear and elevation adjustments are completed, the joints on both sides of the steel box beam are immediately connected with the code plate, and both sides are required to be carried out simultaneously, and the joints are welded.

[0065] Furthermore, adjusting the position of the steel beam in S6 includes: when the bridge crane synchronously lifts the steel box beam of the closing section to below the closing mouth, four hand winches are installed on the steel box beam of the closing section and the steel box beams on both sides adjacent to it, forming a group of two for traction along the mileage direction, and adjusting the plane position of the closing section to the middle of the closing mouth.

[0066] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can refer to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system or system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiment. The system and system embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without creative work.

[0067] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A suspended casting rotation-pushing-closing multiple system conversion control system, characterized in that: Including detection module, rotation module, pouring and pushing module and closing module: Detection module: build the casting support and embedded base, arrange the total station in the closing section, and install the sensor module after the casting support and embedded base are completed; The rotating module is connected to the first output terminal of the detection module, and uses the sensor module to obtain displacement data, obtains the eccentricity according to the displacement data, and performs counterweighting; The pouring push module is connected to the output end of the rotating module and the second output end of the detection module respectively, calculates the predicted pouring position, and the traction equipment pours the concrete to the corresponding position, determines the side pressure and pouring height, stops pouring when the pouring height reaches the preset value, and controls the sliding drive device to move the steel beam after cooling; The closing module is connected to the output end of the pouring and pushing module and the third output end of the detection module respectively. After the steel beam reaches the preset position, it is closed to determine whether the closing axis is deviated. If not, the gap between the steel beams is welded. If so, the position of the steel beam is adjusted.

2. A method for controlling the conversion of multiple systems of suspended casting, rotation, pushing and closing, characterized in that: The following steps are involved: S1. Build the casting support and embedded base. The bridge is divided into cantilever section and closing section. The total station is set up in the closing section. S2. After the pouring bracket and embedded base are erected, the sensor module is installed; S3, using the sensor module to obtain displacement data, obtaining the eccentricity according to the displacement data, and performing counterweighting; S4, calculate the predicted pouring position, use the traction equipment to pour the concrete to the corresponding position, and determine the side pressure and pouring height; S5. When the pouring height reaches the preset value, the pouring is stopped. After cooling, the sliding drive device is controlled to move the steel beam. When the steel beam reaches the preset position, it is closed. S6. Determine whether the closing axis is deviated. If not, weld the gap between the steel beams. If so, adjust the position of the steel beams.

3. The method for controlling the conversion of multiple systems of suspended casting rotation-pushing-closing according to claim 2 is characterized in that: The sensor modules in S2 include but are not limited to infrared distance sensors, inclination sensors, displacement sensors, strain gauge resistor sensors, strain gauge sensors and stress sensors.

4. The method for controlling the conversion of multiple systems of suspended casting rotation-pushing-closing according to claim 2 is characterized in that: S3 includes obtaining the eccentricity according to the fact that the friction torque of the ball joint is greater than the unbalanced torque of the rotating body and the friction torque of the ball joint is less than the unbalanced torque of the rotating body.

5. The method for controlling the conversion of multiple systems of suspended casting rotation-pushing-closing according to claim 2 is characterized in that: In S3, the counterweight is completed, and the rotation module controls the traction system and auxiliary system to perform a trial rotation.

6. The method for controlling the conversion of multiple systems of suspended casting rotation-pushing-closing according to claim 2 is characterized in that: Controlling the slip drive device in S5 includes controlling the drive using a hydraulic slip system.

7. The method for controlling the conversion of multiple systems of suspended casting rotation-pushing-closing according to claim 2 is characterized in that: Closure in S5 includes welding the rigid skeleton and tensioning temporary prestressed tendons.

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