KR101617710B1 - Bridge displacement gauge using string - Google Patents

Bridge displacement gauge using string Download PDF

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Publication number
KR101617710B1
KR101617710B1 KR1020150136874A KR20150136874A KR101617710B1 KR 101617710 B1 KR101617710 B1 KR 101617710B1 KR 1020150136874 A KR1020150136874 A KR 1020150136874A KR 20150136874 A KR20150136874 A KR 20150136874A KR 101617710 B1 KR101617710 B1 KR 101617710B1
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KR
South Korea
Prior art keywords
pulley
attachment plate
line
pulleys
bridge
Prior art date
Application number
KR1020150136874A
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Korean (ko)
Inventor
이길호
곽민호
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케이에스엠기술 주식회사
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Priority to KR1020150136874A priority Critical patent/KR101617710B1/en
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Publication of KR101617710B1 publication Critical patent/KR101617710B1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/14—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/06—Arrangement, construction or bridging of expansion joints
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/04—Gearings for conveying rotary motion by endless flexible members with ropes

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

The present invention relates to an apparatus for measuring the amount of expansion and contraction of a member provided at a discontinuous point of a bridge girder (11) or at a discontinuous point of a bridge bed (12) A plurality of pulleys 30 and a test line 20 which is installed by turning the pulleys 30 and maintains a tension state. The test lines 20, which are generated when the distances between the pulleys 30 are close to each other, The elongation amount of the measurement target member can be grasped by measuring the movement distance of the measurement target member 20.
Through the present invention, it is possible to move the inspection line 20 greatly enlarged compared to the actual proximity or separation distance between the measuring devices installed on the bridge overhead structure to be measured, thereby amplifying and obtaining the measurement values of the expansion / contraction of the structure Thus, the degree of measurement can be remarkably improved.

Description

[0001] BRIDGE DISPLACEMENT GAUGE USING STRING [0002]

The present invention relates to an apparatus for measuring the amount of expansion and contraction of a member provided at a discontinuous point of a bridge girder (11) or at a discontinuous point of a bridge bed (12) A plurality of pulleys 30 and a test line 20 which is installed by turning the pulleys 30 and maintains a tension state. The test lines 20, which are generated when the distances between the pulleys 30 are close to each other, The elongation amount of the measurement target member can be grasped by measuring the movement distance of the measurement target member 20.

Deformation and displacement of bridges such as bridges (12) and girders (11) are the key elements for analyzing the dynamic behavior of bridges. They are used as basic information for maintenance work of bridges including safety diagnosis, The horizontal stretching amount is required as essential data in order to grasp the structural stability of the bridge under various conditions such as temperature change as well as traffic load, and various efforts have been made for securing the accuracy (accuracy) As disclosed in Japanese Patent No. 726718.

The conventional bridge elongation measurement device including the patent No. 726718 is a method in which a reference chuck is fixedly installed on a bridge bridge substructure such as a bridge pier and the indicating means is attached to the bridge overhead structure to be measured. However, since the amount of expansion and contraction can only be measured on the basis of the moving distance of the indicating means which is equal to the actual expansion amount, there is a limit to the measurement accuracy.

That is, since measurement is performed in such a manner that the scale of the reference chuck is read through the instruction means that moves according to the actual expansion / contraction amount of the actual structure, sufficient measurement of the minute variation is fundamentally impossible, There is a problem that can be seriously changed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide an apparatus for measuring the amount of elongation of members installed at discontinuous points of a bridge superstructure, wherein attachment plates 35 are provided on both discontinuous point members, 35 are provided so that a plurality of pulleys 30 are freely rotatable so that the rotating shafts of the pulleys 30 are parallel to each other and the test line 20 having one end fixed to the one attachment plate 35 is connected to the one attachment plate And the pulley 30 of the pulley 30 of the pulley 30 and the pulley 30 of the pulley 30 of the pulley 30 of the pulley 30 of the pulley 30 on the other side of the pulley 30 are alternately rotated. The pulley 30 of the one attachment plate 35 and the pulley 30 of the attachment plate 35 of the other side are attached to each other as the measurement subject member is stretched and contracted, And the indicator line (20) and the indicator (41) are moved. A sinchukryang amount measuring device.

The attachment plate 35 is provided with a main body 60 having an active groove 61 and the inspection line 20 is connected to the inspection line 20 between the pulley 30 and the weight 50, A buoy 70 for dividing the scale 60 is installed so as to be engaged with the active groove 61 so that the buoy 70 is moved in the buoy 60 as the inspection line 20 is moved. And is moved along the active groove (61).

Through the present invention, it is possible to move the inspection line 20 greatly enlarged compared to the actual proximity or separation distance between the measuring devices installed on the bridge overhead structure to be measured, thereby amplifying and obtaining the measurement values of the expansion / contraction of the structure Thus, the degree of measurement can be remarkably improved.

As a result, not only the extreme amount of elongation and expansion can be accurately measured, but also the absolute value of the measurement error can be drastically reduced, and the fluctuation of the measurement value and the error of each user can be reduced to improve the reliability of the measurement value.

1 is a perspective view of a girder installation state of the present invention;
FIG. 2 is a perspective view of the under-
3 is a side view of the girder installation according to the present invention
Figure 4 is a perspective view of an embodiment of the present invention,
Figure 5 is a perspective view of one embodiment of the present invention,
Fig. 6 is a cutaway exploded perspective view of the main part of the embodiment of Fig. 5,
7 is a perspective view of an embodiment of the present invention in which an attachment plate is divided;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings.

First, FIG. 1 illustrates a state in which the apparatus for measuring elongation and contraction of the present invention is installed on a bridge girder 11, and it is confirmed that the apparatus is installed in such a manner that it is attached to an end surface of the girder 11. [

The present invention is installed in an upper structure of a bridge such as a girder 11 or a bridge bed 12 and is installed at a discontinuity point of a bridge superstructure as illustrated in Fig. The amount of elongation and shrinkage is measured.

The discontinuity point of the bridge superstructure refers to a point at which members constituting the structure are divided. As shown in FIG. 1, the two girders 11 arranged in a line in the throttling direction are supported at points at which the bridge supports, And a stretch joint 15 is formed on the upper surface.

Therefore, when the girder 11 is stretched due to a temperature change or various loads, the discontinuous point side girders 11 are brought close to each other. When the girder 11 is retracted, the discontinuous point side girders 11 are separated from each other. It is possible to measure the elongation amount or the shrinkage amount of the girder 11 by measuring the proximity or the distance of movement between the side girders 11 at the structure discontinuity point.

2, when the present invention is installed on the bottom surface 12 of the bridge 12 at the bridge top structure discontinuity point, by measuring the proximity or distance of travel between the bridge 12 in the bridge 12, The amount of elongation or the amount of shrinkage can be measured.

That is, the present invention measures the proximity or spacing distance between mechanically separated members. As shown in Figs. 1 to 3, an attachment plate 35 attached to both side members at discontinuities and an attachment plate 35 A plurality of pulleys 30 installed on the pulley 30 and a single test line 20 in a tense state pivoting the pulley 30.

A plurality of pulleys 30 are freely rotatably mounted on both side attachment plates 35 constituting the present invention. The rotary shafts of the pulleys 30 are parallel to each other, and the attachment plates 35, The rotation axis of each pulley 30 is orthogonal.

In the present invention, the test line 20 pivoting the pulley 30 is always tensioned. In the illustrated embodiment, the weight 50 is applied as a means for tensioning the test line 20. [

As shown in FIGS. 1 to 3, one end of the elastic member may be fixed to one side attachment plate 35 And the inspection line 20 to which the weight 50 is bound is installed at the other end by alternately turning the pulley 30 of the one attachment plate 35 and the pulley 30 of the other attachment plate 35.

3, the inspection line 20 having one end fixed to the fixing portion 36 formed on the left attachment plate 35 in the drawing rotates the uppermost pulley 30 of the right attachment plate 35 The upper attachment pulley 30 of the left attachment plate 35 is pivoted and the upper attachment pulley 30 of the right attachment plate 35 is again pivoted and then the upper attachment pulley 30 The pulleys 30 of the both side attachment plates 35 are alternately rotated.

As the inspection line 20 of the present invention, a wire made of metal or synthetic resin having a slight expansion or contraction due to a temperature change or an external force can be applied, and since it is necessary to maintain the tension state at all times, a high strength stranded wire .

The weight 50 is bound to the test line 20 at the other end of the portion of the test line 20 bound to the fixed portion 36 so that the weight of the test line 20 2, a diverting pulley 39 is provided on the attachment plate 35 at a portion where the weight 50 is connected, and the diaphragm 50 of the weight 50 is connected to the inspection line 20 So that the tensile force imparted by the weight 50 can be transmitted to the horizontal test line 20.

1 and 3, an indicator 41 is mounted between the pulley 30 and the weight 50, which is finally rotated by the test line 20, and the moving state of the test line 20 is read A scale is displayed on the attachment plate 35 on which the weight 50 and the diverting pulley 39 are installed and a needle indicator 41 is attached to the inspection line 20 at the corresponding position .

In the apparatus for measuring elongation and contraction according to the present invention, the test line 20 is always kept in a tension state due to the weight of the weight 50. As shown in FIG. 3, as the member to be measured expands and contracts, The pulley 30 of the pulley 30 and the pulley 30 of the other side attachment plate 35 are moved close to or away from each other and the test line 20 and the indicator 41 are moved. Since the movement of the line 20 is accumulated and the line of sight 20 of the portion where the indicator 41 is mounted moves, the result of amplifying the measurement value is derived.

Fig. 4 shows an embodiment of the present invention in which a multiple diverting pulley 39 is applied. By mounting two diverting pulleys 39 arranged above and below as shown in the figure, the weight 50 ) Can be extended, thereby extending the measuring range of the member extensibility.

5 and 6 show measurement accuracy obtained by applying the mandrel 60 and the buoy 70, that is, a vernier, so that the extremely small amount of expansion and contraction of the member to be measured can be accurately measured.

5 and 6, the attachment plate 35 on which the weight 50 is installed is provided with a main body 60 on which an active groove 61 is formed, and the inspection line 20 is provided with a pulley 30 The inspection line 20 is provided on the inspection line 20 between the inspection line 20 and the weight 50 so as to be movable in a state of being engaged with the active groove 61, The buoy 70 is moved along the active groove 61 in the main body 60. [

6, a protrusion 71 is formed in the block 70, and a cross-sectional shape of the active groove 61 formed in the block 60 is formed to coincide with the block 70 on which the protrusion 71 is formed , The buoy stop 70 can be stably operated in a state of being coupled to the main spindle 60, but the departure of the buoy stop 70 can be prevented.

5 and 6, the scales 60 and 70 of the present invention are different from conventional vernier-type measuring instruments capable of only one-directional measurement such as vernier calipers, And the minute scale displayed on the upright 70 is also displayed so that the numerical value increases to both sides with respect to the central portion of the upright 70, And the movement was measured.

7 shows an embodiment of the present invention in which the attachment plate 35 is dividedly applied and the reading means such as the fixing portion 36 and the mandrel 60 are respectively installed on different members. One side attachment plate 35 is divided into an attachment plate 35 on which the weight 50 and the mandrel 60 are installed and an attachment plate 35 on which the pulley 30 is installed, It is possible to apply the present invention even when there is a restriction on the installation space of the main body 35 and to provide convenience of the measurement operation by separately installing the reading means such as the main body 60 in a place where access is easy, It is possible.

11: Girder
12: Classification
15: Expansion joint
20:
30: Pulley
35: Attachment plate
36:
39: diverting pulley
41: Indicator
50: Weight
60: Casting
61: Activity home
70: Bucheon
71: protrusion

Claims (2)

An apparatus for measuring an amount of elongation of a member provided with a test line (20) at a discontinuous point of a bridge superstructure,
Attachment plates (35) are attached to both side members of the discontinuous points, respectively;
A plurality of pulleys 30 are freely rotatably mounted on each side attachment plate 35, and the rotation axes of the pulleys 30 are parallel to each other;
The inspection line 20 fixed to the one side attachment plate 35 is installed by alternately turning the pulley 30 of the one side attachment plate 35 and the pulley 30 of the other side attachment plate 35;
An indicator 41 is mounted on the inspection line 20 outside the pulley 30 which is finally turned by the inspection line 20;
The pulley 30 of the one attachment plate 35 and the pulley 30 of the other attachment plate 35 are closely spaced or spaced apart as the object to be measured is stretched or shrunk as the test piece 20 is kept in the state of being always tensed, Wherein the line (20) and the indicator (41) are moved.
The method according to claim 1,
The attachment plate (35) is provided with a main body (60) having an active groove (61) formed therein;
A checker 70 for dividing the scales 60 is attached to the inspection line 20 between the pulley 30 and the weight 50 which is finally rotated by the inspection line 20, ≪ / RTI >
And the buoy rest (70) is moved along the active groove (61) in the main body (60) as the test line (20) is moved.
KR1020150136874A 2015-09-25 2015-09-25 Bridge displacement gauge using string KR101617710B1 (en)

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KR1020150136874A KR101617710B1 (en) 2015-09-25 2015-09-25 Bridge displacement gauge using string

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KR101617710B1 true KR101617710B1 (en) 2016-05-03

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101943955B1 (en) * 2018-07-04 2019-01-31 세기하이테크건설 주식회사 Tendon construction method using rigid sheathed strand
KR101948914B1 (en) * 2018-05-30 2019-05-02 주식회사 아워브레인 Movement measuring device of Bridge seat device
KR102168034B1 (en) * 2019-10-01 2020-10-21 주식회사 제이앤밸류 Device and method of freely increase the resolution for the bridge displacement sensor by using the pulley system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101948914B1 (en) * 2018-05-30 2019-05-02 주식회사 아워브레인 Movement measuring device of Bridge seat device
KR101943955B1 (en) * 2018-07-04 2019-01-31 세기하이테크건설 주식회사 Tendon construction method using rigid sheathed strand
KR102168034B1 (en) * 2019-10-01 2020-10-21 주식회사 제이앤밸류 Device and method of freely increase the resolution for the bridge displacement sensor by using the pulley system

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