KR101756030B1 - Position modification method of bridge upper structure by proportional deviation control - Google Patents

Abstract

The present invention is capable of precise lifting even if a unidirectional load is first applied through an initial contact load pressing step and the position of the attitude adjustment is changed by inclining the bridge upper structure in a desired lateral direction or longitudinal direction through secondary proportional deviation control The present invention provides a method of adjusting the position of a bridge overhead structure by controlling a proportional deviation according to a displacement. A method for adjusting the position of a bridge overhead structure by controlling a proportional deviation according to a displacement according to a preferred embodiment of the present invention comprises the steps of: (a) raising the hydraulic jacks in the transverse direction to the lower portion of the bridge overhead structure, And a height measuring sensor for measuring the height of the upper structure is installed on one side of each hydraulic jack. Then, the respective hydraulic jacks are connected to the individual hydraulic pump of the hydraulic apparatus by a hydraulic pipe so as to correspond one- An impression preparing step of electrically connecting a pressure transducer and a timer to a tuning controller connected to the pressure control valve of the hydraulic pump; (b) inputting the target lifting height, initial contact load, and lifting tolerance of each hydraulic jack of each hydraulic jack to the variable input computer electrically connected to the tuning controller, and at the same time, ; ≪ / RTI > (c) a primary control step of driving all the hydraulic pumps within a range in which the positional change due to the load load of each hydraulic jack is not generated before the lifting of the bridge superstructure, thereby pressing the initial contact load on the bridge superstructure; (d) when pressurization of the initial contact load is completed, all the hydraulic pumps are driven during the impression reaching time, and the measured signals of height, pressure, and pull-up time measured from the height measuring sensor, the pressure transducer and the timer are continuously A second order proportional deviation control step in accordance with the displacement for performing the target increase in each point by the synchronous operation of each hydraulic jack through the calculated proportional operation output signal, ; (e) stopping the pulling of all of the hydraulic jacks and ending the pulling up if the input set time is reached within a range satisfying the pulling displacement tolerance for each point.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method of adjusting a position of a bridge superstructure by controlling a proportional deviation according to a displacement,

The present invention relates to a method for adjusting the position of a bridge superstructure, and more particularly, to a multidisciplinary tuning control system in which a slope (inclination) of a bridge superstructure is changed by selectively using a load and a displacement tuning control system in accordance with each case, The proportional target displacements for different hydraulic jacks are set and applied, and the time limit is set based on the maximum lift height to synchronize the displacement, pressure, and time so that the proportional proportion according to the displacement And more particularly, to a method of adjusting the position of a bridge overhead structure by controlling a deviation.

The principle of the conventional bridge lifting method is that the stroke of the hydraulic cylinder is set within tolerance (usually within ± 1.0 mm) to operate a heavy load by using two or more hydraulic cylinders at the same height The system has been applied.

This control system is effective in the case of replacing the existing bridges, or in the case of raising the bridges equally in order to secure the structural stability of the bridges due to the lack of the height of the bridge lower space.

The same displacement control system has the following disadvantages.

First, even the hydraulic cylinders manufactured to the same specifications may not be uniform in quality, and the unstable flow of the hydraulic fluid due to the installation length of hydraulic cables, the number of hydraulic cylinders installed, The control by the hydraulic pressure tuning may be difficult to keep the performance constant within the tolerance.

Second, in case of lifting the upper structure of 2 ~ 3mm for normal bridge support replacement, when a heavy vehicle passes through the lifting point on one side in a multi-lane section, it receives a serious unidirectional load, .

For example, on the other hand, the tuning control becomes very difficult due to the excessive deflection due to lifting of the structure while the vehicle is passing through.

In the case of a pulling during the vehicle running, which is one of the disadvantages of the conventional impression method, if a heavy vehicle passes on one side, an extremely small amount of impression (3 mm In the case of the impression for replacing the existing bridge support, the precise control within the tolerance to the raise target becomes very difficult. In addition, since the existing system can only raise the hydraulic cylinder stroke at the same height, it is difficult to apply the present invention to a conventional bridge superstructure in which the stroke is different for each hydraulic cylinder installed, when changing the inclination of the longitudinal or transverse direction.

Therefore, although there is no change in the position of the structure according to the method of reinforcing the bridge superstructure, a new concept of the control system is required when the hydraulic jack installed only receives a heavy load.

As a background of the present invention, Korean Registered Patent No. 10-0833686 has proposed a control device for lifting a bridge structure and a lifting method using the same. This is a test impression step in which a hydraulic cylinder is operated by the operation of a hydraulic pump to measure a load ratio acting on a lifting point of the structure, A load ratio measurement step of transmitting a displacement measured from a displacement measuring instrument provided at a lifting point of the structure and a load measured from a load system provided at an upper portion or a lower portion of the hydraulic cylinder to a controller; A load factor calculating step of calculating an initial load factor acting on each of the lifting points of the structure based on the displacement and the load transmitted to the controller; A differential pressure injection step of applying differential pressure to the hydraulic cylinders provided at the respective impression points so as to set respective hydraulic cylinder pressures equal to the load rates measured at the respective impression points according to the calculated initial load rates; An equal pressure injection step of additionally injecting the same pressure into each of the hydraulic cylinders when the load factors acting on the respective impression points become the same after the step, thereby pulling up the structure; And a control step of stopping the operation of the hydraulic cylinder by comparing the displacement value measured according to the pull-up of the structure and the set value, and if the displacement value is the same, It is possible to perform precise work even with a single impression work by allowing the structure to be pulled up at different pressures. As a result, it is possible to increase the efficiency by reducing the work time and the like, It has an advantage of preventing a safety accident.

However, in the case of the above-mentioned background art, an extremely small amount of impression (about 3 mm) is carried out unless a heavy vehicle passes through the vehicle in the case of pulling the vehicle, unless contact between a plurality of hydraulic cylinders In the case of an impression for replacing existing bridge supports, it is disadvantageous that precise control within an error is very difficult.

Korean Patent Registration No. 10-0833686

The present invention is capable of precise lifting even if a unidirectional load is first applied through an initial contact load pressing step and the position of the attitude adjustment is changed by inclining the bridge upper structure in a desired lateral direction or longitudinal direction through secondary proportional deviation control The present invention provides a method for adjusting the position of a bridge overhead structure by controlling a proportional deviation according to a displacement.

A method for adjusting the position of a bridge overhead structure by controlling a proportional deviation according to a displacement according to a preferred embodiment of the present invention comprises the steps of: (a) raising the hydraulic jacks in the transverse direction to the lower portion of the bridge overhead structure, And a height measuring sensor for measuring the height of the upper structure is installed on one side of each hydraulic jack. Then, the respective hydraulic jacks are connected to the individual hydraulic pump of the hydraulic apparatus by a hydraulic pipe so as to correspond one- An impression preparing step of electrically connecting a pressure transducer and a timer to a tuning controller connected to the pressure control valve of the hydraulic pump; (b) inputting the target lifting height, initial contact load, and lifting tolerance of each hydraulic jack of each hydraulic jack to the variable input computer electrically connected to the tuning controller, and at the same time, ; ≪ / RTI > (c) a primary control step of driving all the hydraulic pumps within a range in which the positional change due to the load load of each hydraulic jack is not generated before the lifting of the bridge superstructure, thereby pressing the initial contact load on the bridge superstructure; (d) when pressurization of the initial contact load is completed, all the hydraulic pumps are driven during the impression reaching time, and the measured signals of height, pressure, and pull-up time measured from the height measuring sensor, the pressure transducer and the timer are continuously A second order proportional deviation control step in accordance with the displacement for performing the target increase in each point by the synchronous operation of each hydraulic jack through the calculated proportional operation output signal, ; (e) stopping the pulling of all of the hydraulic jacks and ending the pulling up if the input set time is reached within a range satisfying the pulling displacement tolerance for each point.

In the step (c), the initial contact load is set within 20% of the pulling point reaction force in consideration of the deviation of the reaction force of the load.

Further, in the step (d), proportional deviation control of each hydraulic jack is performed in a lateral direction for rectilinear change to the lane, so that the bridge upper structure is inclined upward in the transverse direction.

Further, in the step (d), the proportional deviation control of each hydraulic jack is performed in the longitudinal direction for height difference between the starting end and the ending end of the bridge superstructure connected in the lane, so that the bridge upper structure is inclined upward .

In addition, in step (b), the lifting height of each hydraulic jack is inputted to the variable input computer equally, and the lifting height is raised to an equal height at each lifting point.

According to the method of adjusting the position of the bridge superstructure through the proportional deviation control according to the present invention, the contact surface between the hydraulic jack and the bridge superstructure is surely formed before the lifting of the bridge superstructure by the primary control, And the second and the third proportional drift control is performed to perform the tuning control at all the impression points by repeating the feedback operation of the height, pressure and time obtained at each impression point to determine the lateral or longitudinal position of the bridge overhead structure It can be adjusted in a stable manner.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments of the invention and, together with the description, serve to explain the principles of the invention, Shall not be construed as limiting.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a general configuration diagram of a position control system for a bridge superstructure through proportional-deviation control according to the present invention; FIG.
Fig. 2 is an illustration showing an impression system installed at a pier or an alternate position in Fig. 1;
3 is a flow diagram of a feedback signal in a tuning control in a position adjustment system of a bridge superstructure through proportional deviation control according to the present invention.
FIG. 4 is an exemplary view showing a state in which the bridge superstructure is adjusted to be inclined in the lateral direction by applying the method of the present invention, and FIG.
5 is a flowchart of a position adjustment control of a bridge superstructure through proportional deviation control according to the present invention.
6 is an exemplary view showing a state in which the bridge superstructure is adjusted in an inclined manner in the longitudinal direction by applying the method of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings, but the present invention is not limited thereto.

First, the configuration of a system for a position adjustment method of a bridge superstructure according to the present invention will be described.

As shown in Figs. 1 and 2, the hydraulic apparatus 30 is provided in the alternation 2 and the bridge 3, respectively. The hydraulic device (30) has hydraulic pumps (31, 32, 33, 34) corresponding to the number of pulling points. In this embodiment, since there are four points of elevation for each alternation 2 and bridge 3, the hydraulic apparatus 30 having four hydraulic pumps 31 to 34 for each alternation and bridge angle is provided.

The hydraulic device 30 is provided with pressure control valves 311, 312, 313, and 314 for controlling the discharge pressures of the respective hydraulic pumps 31, 32, 33, and 34. The pressure control valves 311, 312, 313 and 314 are connected to the discharge ports of the respective hydraulic pumps 31, 32, 33 and 34. The hydraulic apparatus 30 is also provided with pressure transducers 321, 322, 323, and 324 for measuring the load pressures of the hydraulic jacks 11, 12, 13, and 14 installed at the lifting points for the alternation 2 and bridge columns 3, respectively.

Height measurement sensors 21, 22, 23 and 24 for measuring the pull-up heights d1, d2, d3 and d4 are provided at the respective impression points of the upper structure 4. [ The height measurement sensors 21, 22, 23 and 24 are located at the lower part of the bridge superstructure 4 and are arranged at one side of the hydraulic jacks 11, 12, 13 and 14 for the alternation 2 and the bridge 3, respectively .

The height measuring sensors 21, 22, 23 and 24 and the pressure transducers 321, 322, 323 and 324 are electrically connected to the tuning controller 40. Timers 331, 332, 333 and 334 for measuring the driving time of the hydraulic pumps 31, 32, 33 and 34 are connected to the tuning controller 40. Therefore, the tuning controller 40 calculates the lifting height measured from the height measuring sensors 21, 22, 23 and 24, the lifting pressure signal measured from the pressure transducers 321, 322, 323 and 324 and the lifting time measured from the timers 331, 332, 333 and 334 It repeatedly receives the feedback input, processes it, and automatically adjusts the strokes of the hydraulic jacks (11, 12, 13, 14) synchronously. At this time, the tuning controller (40) performs automatic calculation when the tolerance is out of order and adjusts the stroke of the hydraulic jack. Thus, when the strokes of the entire hydraulic jacks 11, 12, 13, and 14 satisfy the set arrival time of the highest raise point within the tolerance to the predetermined target value, all the hydraulic jacks 11, 12, 13, and 14 stop.

A variable input computer 50 electrically connected to the tuning controller 40 is provided. D1, d2, d3 and d4 of the respective hydraulic jacks 11, 12, 13 and 14, the initial contact pressure P and the pulling tolerance e are inputted to the variable input computer 50 , And an impression reaching time (T) is inputted based on the maximum raise height (d4) for proportional deviation control raise.

A method of adjusting the position of the bridge overhead structure using proportional deviation control using the impression system constructed as above will be described with reference to FIG.

Here, the longitudinal direction means the longitudinal direction of the bridge (diagonal direction), and the lateral direction means the orthogonal direction perpendicular to the longitudinal direction, that is, the direction perpendicular to the diagonal axis.

<Preparation for Impression>

First, as shown in Figs. 1 and 2, the hydraulic jacks 11, 12, 13, and 14 are vertically moved to the lower portion of the bridge overhead structure 4 at each alternation 2 and bridge pier 3, D2, d3, and d4 for each of the lifting points of the upper structure 4 are provided on one side of the hydraulic jacks 11, 12, 13, The hydraulic jacks 11, 12, 13, and 14 are connected to the individual hydraulic pumps 31, 32, 33, and 34 of the hydraulic device 30 in a one-to-one correspondence with hydraulic pipes, And the timers 331, 332, 333 and 334 are connected to the pressure control valves 311, 312, 313 and 314 of the hydraulic pumps 31, 32, 33 and 34, To prepare for pulling up (S11).

<Pull height, initial contact load, impression reach time and Impression tolerance  Input>

D3 and d4 of the hydraulic jacks 11, 12, 13 and 14 of the variable input computer 50 connected to the tuning controller 40 and the initial contact pressure P) and the pulling tolerance (e), and at the same time, the rise time (T) is inputted based on the maximum raise height (d4) for pulling up the proportional deviation control.

<Primary initial contact load pressure>

Then, before the lifting of the bridge superstructure 4, all of the hydraulic pumps 31, 32, 33, 34 (not shown) are moved in the range that the positional change due to the load load of each of the hydraulic jacks 11, 12, 13, (S13). The primary control load is applied to the bridge superstructure (4).

은 A(유효단면적)=142.86㎠일 경우, 아래와 같이 구할 수 있다.Preferably, the initial contact load is within about 20% of the reaction force of the installed hydraulic jacks 11, 12, 13, 14. For example, when the hydraulic jack maximum pressure is 700bar, the hydraulic jack initial pressure is 140bar (20% of the maximum pressure), the hydraulic jack load load (when the cylinder capacity is 100 tons)

Is A (effective cross-sectional area) = 142.86 cm 2, it can be obtained as follows.

,

,

 Therefore, the initial contact load (P) is 140 = P / 142.86 and the initial contact load (P) is 20 tons.

<Secondary Proportional deviation control  Impression>

If it is determined that the initial contact load satisfies the allowable error load within the allowable error load (S13), the second-order proportional-deviation control pull-up step (S15) is performed if the allowable error load is satisfied.

This means that all the hydraulic pumps 31, 32, 33 and 34 are driven during the impression reaching time T and at the same time the height measured from the height measuring sensors 21 to 24, the pressure transducers 321 to 324 and the timers 331, 332, 333 and 334 (PLC) the deviation between the set signal and the input measurement signal by repeatedly and repeatedly inputting the measurement signal of the pressure (d1 to d4), the pressure and the pull-up time (T1 to T4) to the tuning controller (40) And performs a target-specific target impression by synchronizing the hydraulic jacks (11, 12, 13, 14) through the proportional action output signal.

Here, the tuning controller 40 receives the height signal from the height measurement sensor 21, 22, 23, 24, the pressure signal from the pressure transducer 321, 322, 323, 324 and the impression time measured from the timer 331, 332, 333, And automatically adjusts the strokes of the hydraulic jacks 11, 12, 13, and 14 synchronously. At this time, the tuning controller (40) performs an automatic calculation when the tolerance is out of order to selectively adjust the stroke of the hydraulic jack.

When the proportional deviation control of the hydraulic jacks 11, 12, 13, and 14 is performed in the lateral direction to linearly change the lane (or line) at this stage, the bridge upper part structure 4 is moved in the horizontal direction As shown in FIG.

At this stage, proportional deviation control of the hydraulic jacks 11, 12, 13, and 14 is performed in the longitudinal direction for the difference in height between the starting end and the ending end of the bridge superstructure 4 connected to the vehicle (or line) , The bridge superstructure 4 can be adjusted to be inclined in the longitudinal direction as shown in FIG.

4 and 6, the lifting height T satisfies T4 = T3 = T2 = T1 while the lifting height T has d4 (h4)> d3 (h3)> d2 (h2)> d1 do.

<Impression end>

Then, it is judged whether or not the target time has been reached within the tolerance range (S16). When the input set time is reached within the range satisfying the respective pull-up displacement tolerance for each point, all the hydraulic jacks 11, 12, 13, (S17). That is, when the strokes of the entire hydraulic jacks 11, 12, 13, and 14 satisfy the set arrival times of the maximum raise points within a tolerance up to a predetermined target value, all the hydraulic jacks 11, 12, 13, and 14 stop.

Therefore, as shown in FIG. 4, the bridge upper structure 4 can be stably pulled up so as to be inclined in the transverse direction for linear change of the lane.

In addition, as shown in FIG. 6, the bridge upper structure 4 may be stably pulled up so as to be inclined in the longitudinal direction for the height difference between the start end and the end end of the bridge upper structure 4 connected to the lane in the above step.

D3, d4 of the hydraulic jacks 11, 12, 13, and 14 are equally input to the variable input computer 50 at the upper pulling height input stage, Of course, can be made.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the above teachings. will be. The invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

11, 12, 13, 14: Hydraulic Jack
21, 22, 23, 24: Height measurement sensor
30: Hydraulic device
31, 32, 33, 34: Hydraulic pump
321, 322, 323, 324: pressure transducer
40: Tuning controller
50: Variable input computer

Claims (5)

(a) The hydraulic jacks 11, 12, 13, and 14 are arranged at the respective elevation points in the transverse direction by the number of lifting points to the lower portion of the bridge superstructure 4 in the alternation 2 and bridge pier 3, D2, d3, and d4 of the upper structure 4 are provided on one side of each of the elevation sensors 11, 12, 13, and 14, and then height measurement sensors 21, 22, 13, and 14 are connected to the individual hydraulic pumps 31, 32, 33, and 34 of the hydraulic device 30 in a one-to-one correspondence with hydraulic pipes, and the height measurement sensors 21, 22, 322, 333 and 334 and the timers 331, 332, 333 and 334 to the tuning controller 40 connected to the pressure control valves 311, 312, 313 and 314 of the hydraulic pumps 31, 32, 33 and 34, Wow;
d2, d3, and d4 of the hydraulic jacks 11, 12, 13, and 14 of the variable input computer 50 electrically connected to the tuning controller 40, (P) and a pulling tolerance (e), and at the same time, inputting an impression arrival time (T) based on a maximum raise height (d4) for pulling up a proportional deviation control;
(c) Before the lifting of the bridge overhead structure 4, all of the hydraulic pumps 31, 32, 33, 34 (within the range of not causing the positional change due to the load loads of the hydraulic jacks 11, 12, 13, ) To drive the bridge superstructure (4) with an initial contact load (P);
(d) When the pressing of the initial contact load P is completed, all of the hydraulic pumps 31, 32, 33, 34 are driven during the impression reaching time T and at the same time the height measurement sensors 21 to 24, And the measurement signals of the height, pressure, and pull-up time measured from the timers 321 to 324 and the timers 331, 332, 333, and 334 are repeatedly and repeatedly input to the tuning controller 40 to calculate the deviation between the set- A second-order proportional-deviation control raising step according to a displacement to perform a target-specific target raising by a synchronous operation of each of the hydraulic jacks (11, 12, 13, 14) through a proportional operation output signal;
(e) stopping the pulling up of all of the hydraulic jacks 11, 12, 13, 14 and ending the pulling up if the input set time is reached within a range satisfying the pulling displacement tolerance for each point A method for adjusting the position of a bridge overhead structure by controlling a proportional deviation according to a displacement. The method according to claim 1,
Wherein the initial contact load P is set within 20% of the pulling point reaction force in consideration of the deviation of the reaction force of the load in the step (c). The method according to claim 1,
In the step (d), proportional variation control of the hydraulic jacks 11, 12, 13, and 14 is performed in the lateral direction for rectilinear change to the lane so that the bridge upper structure 4 is pulled up in the lateral direction A method of adjusting the position of a bridge overhead structure by controlling a proportional deviation according to displacement. The method according to claim 1,
In the step (d), the proportional deviation control of the hydraulic jacks 11, 12, 13, 14 is performed in the longitudinal direction for the difference in height between the starting end and the ending end of the bridge superstructure 4 connected in the lane, Wherein the structure (4) is pulled up in an inclined manner in the longitudinal direction, and the proportional deviation control according to the displacement is carried out to adjust the position of the bridge superstructure. The method according to claim 1,
In step (b), the lifting heights d1, d2, d3, and d4 of the hydraulic jacks 11, 12, 13, and 14 are equally input to the variable input computer 50, Wherein the displacement of the bridge superstructure is controlled by controlling the proportional deviation according to the displacement.

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