KR101745958B1 - Device for measuring displacement of bridge shoe - Google Patents

Abstract

The present invention relates to an apparatus for measuring a displacement of a bridge, and more particularly, to an apparatus for measuring the amount of displacement of a shoe, which is a displacement absorbing member installed between a coping portion of a bridge pier and a girder of a bridge top plate, The present invention relates to an apparatus for measuring a displacement of a bridge,
That is, the present invention provides a special mechanism for measuring the amount of displacement of a shoe, which is a displacement absorbing member installed between a coping portion of a bridge pier and a girder of a bridge top plate, The present invention provides an apparatus for measuring a displacement of a bridge capable of measuring a displacement of a bridge.

Description

[0001] The present invention relates to a device for measuring a displacement of a bridge,

The present invention relates to an apparatus for measuring a displacement of a bridge, and more particularly, to an apparatus for measuring the amount of displacement of a shoe, which is a displacement absorbing member installed between a coping portion of a bridge pier and a girder of a bridge top plate, The present invention relates to an apparatus for measuring a displacement of a bridge,

Generally, a bridge is composed of a bridge installed on the land surface, a pier installed in water, a bridge top plate including a girder connected between the bridge and the pier or connected between the bridge and the pier.

In addition, a coping portion, which is a separate supporting member, is applied to the upper portion of the pier, and a shoe (shoe), which is a displacement absorbing member which is appropriately moved and displaced between the coping portion and the girder of the bridge top plate in accordance with the lateral and longitudinal movements of the bridge top plate, Is installed.

8, the upper plate 12 is mounted on the bottom of the girder 10 of the bridge top plate, the lower plate 22 is mounted on the coping portion 20, A shoe 30, which is a displacement absorbing member, is mounted between the plates 22.

At this time, the shoe 30 includes an elastic shoe made of an elastic material and a steel shoe made of a steel material.

Therefore, even if relative displacement occurs between the bridge ceiling portion 20 and the girder 10 of the bridge top plate due to shrinkage of the bridge top plate due to external temperature change, wind load, seismic load, or the like, The relative displacement between the coping portion 20 and the girder 10 is absorbed.

Of course, the proper amount of displacement of the shoe as the displacement absorbing member should be limited within a predetermined critical range, and if the bridge is out of the critical range, a problem may arise in the bridge itself.

Therefore, it is necessary to periodically check the amount of displacement of the shoe as the displacement absorbing member at regular intervals.

However, there is no dedicated dedicated tool for measuring the amount of displacement of the shoe, which is the displacement absorbing member, and accordingly, there is a problem that accuracy of measuring the amount of displacement of the shoe is inferior due to the use of a general tape measure by an operator.

Further, since the height of the shoe existing between the coping portion and the girder is low, the operator must take a very uncomfortable posture, measure the length of the upper plate and the length of the lower plate using the general tape measure in an uncomfortable posture, Length and so on, it is inconvenient for the inspection work and troublesome.

That is, since the tape measure itself wobbles or flows in an undesired direction in the state where the tape measure itself is pulled out of the case in an uncomfortable posture, the worker's tape measure posture does not come out, However, there is a problem that the bridge checking work for measuring the displacement of the shoe is very inconvenient and troublesome.

Korean Patent Publication No. 10-2011-0113840 (Oct. 19, 2011)

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a special mechanism for measuring a displacement of a shoe, which is a displacement absorbing member installed between a coping portion of a pier and a girder of a bridge top plate, And to accurately measure the amount of displacement of the shoe in a stable posture.

According to an aspect of the present invention, there is provided a slide fastener comprising: a base frame in which a horizontal frame and a vertical frame are bent at right angles, a tape conveying passage is formed therein, A tape measure transported along the tape measure conveying passage; A slide nipple fixed to a predetermined position of the tape measure and exposed to the outside through a slide hole of the base frame; And a displacement amount measuring unit for calculating a displacement amount of the bridge.

Preferably, the stationary frame for receiving the laser pointer is slidably coupled to the slide hole entrance of the base frame.

More preferably, slide grooves are formed on both side surfaces of the stationary frame so as to insert the entrance end of the slide hole, and light irradiation holes through which light of the laser pointer passes are formed through the lower plate.

Further, an auxiliary tape measure is further attached to one side of the base frame.

Further, a tightening bolt for fixing the tape measure in the tape measure conveying passage is attached to one side of the vertical frame.

Through the above-mentioned means for solving the problems, the present invention provides the following effects.

According to the present invention, by providing a dedicated mechanism for measuring the amount of displacement of a shoe, which is a displacement absorbing member installed between a coping portion of a bridge pier and a girder of a bridge top plate, Can be accurately measured, the measurement error can be reduced for each individual worker, and the safety posture can be stably maintained by the operator to prevent a safety accident.

1 is a perspective view illustrating an apparatus for measuring a displacement of a bridge of a bridge according to the present invention,
2 is a front sectional view showing an apparatus for measuring a displacement of a shoe of a bridge according to the present invention,
3 is a plan view showing an apparatus for measuring a displacement of a shoe of a bridge according to the present invention,
4 and 5 are side cross-sectional views illustrating an apparatus for measuring the amount of shoe displacement of a bridge according to the present invention,
FIGS. 6 and 7 are schematic views showing a method of measuring a displacement of a shoe using a device for measuring a displacement of a shoe of a bridge according to the present invention;
8 is a schematic view showing a state in which a shoe of a bridge is installed;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 3 show an apparatus for measuring a displacement of a bridge according to the present invention, wherein reference numeral 100 denotes a base frame.

The base frame 100 has a tubular structure having a hollow rectangular cross section, and the horizontal frame 110 and the vertical frame 120 are formed in a right-angled bent shape.

In particular, a tape measure conveying passage 130 is formed in the base frame 100 to open to the right and left. On one surface (upper surface), a slide hole 140 is provided to ensure movement of the slide nipple 300 for tape- Respectively.

In addition, the tape measure 200 is transportably installed in the inner space of the base frame 100, that is, the tape measure transfer passage 130.

At this time, the end of the tape measure 200 (bent handle portion as a reference point) passes through the tape measure conveying passage 130 in the vertical frame 120 of the base frame 100, and then protrudes above the vertical frame 120 And exposed to the outside.

As shown in FIG. 4, the slide nipple 300 is provided at a predetermined position of the tape measure 200 as a means for moving the tape measure 200 inserted in the base frame 100 to the left and right. Or the like, and the upper end of the slide nipple 300 is projected to the outside through the slide hole 140 of the base frame 100.

When the worker holds the slide nipple 300 and moves the slide nipple 300 to the left and right, the tape measure 200 in a state of being joined to the slide nipple 300 is moved to the left or right along the tape measure transfer passage 130, The end of the tape measure 200 (the bent handle portion to be the reference point) is further protruded above the vertical frame 120 at the time of the left movement.

A mounting frame 400 for mounting a laser pointer 420 is slidably coupled to an entrance of the slide hole 140 of the base frame 100.

5, a mounting groove for mounting the laser pointer 420 is formed on an upper portion of the mounting frame 400, and inlet ends of the slide holes 140 are inserted into both sides of the mounting groove. And a light irradiation hole 412 through which light of the laser pointer 420 is passed is formed in the lower plate portion.

By irradiating the tape measure 200 with the laser beam through the light irradiation hole 412 in the laser pointer 420, the operator can accurately grasp and read the tape measure indicated by the laser beam.

In addition, an auxiliary tape measure 210 is further attached to one side of the base frame 100 to replace the tape measure, in case the tape measure is in a position where the tape measure can not be viewed according to the posture of the operator.

Hereinafter, the state of use of the shoe displacement amount measuring apparatus of the present invention will be described.

FIG. 6 is a schematic view showing a method of measuring a displacement of a shoe using a device for measuring a displacement of a shoe of a bridge according to the present invention, and shows an example of displacement amount measurement of an elastic shoe made of an elastic material.

First, the base frame 100 is seated on the lower plate 22 mounted on the coping portion 20.

The end of the tape measure 200 (the bent handle portion serving as the reference point) protrudes above the vertical frame 120 by operating the operator to hold the slide nipple 300 and transfer it to the left side, 200 are brought into close contact with the upper end of the elastic shoe (30) in contact with the upper plate (12).

The edge of the tape measure 200 in close contact with the upper end of the elastic shoe 30 and the boundary point (perpendicular bending point) between the vertical frame 120 and the horizontal frame 110 of the base frame 100 are vertically aligned .

In this case, the tensioner bolts 150 mounted on one side of the vertical frame 120 are tightened so that the tape measure 200 protruding above the vertical frame 120 does not descend again, 200 are fixed by the tightening force of the tightening bolt 150. [

At the same time, the laser pointer 420 is transferred along the slide hole 140 of the base frame 100 to the lower end of the elastic shoe 30.

At this time, laser beam is irradiated to the tape measure 200 through the light irradiation hole 412 by the laser pointer 420 transferred to the lower end position of the elastic shoe 30.

The edge of the tape measure 200 that is in contact with the upper end of the elastic shoe 30 from the boundary point between the vertical frame 120 of the base frame 100 and the horizontal frame 110 (Length) between the upper end portion and the lower end portion of the elastic shoe 30 can be accurately measured by the operator reading the tape measure 200 scale up to the point indicated by the light of the elastic shoe 420.

On the other hand, when the worker takes an attitude that the point of the tape measure indicated by the light of the laser pointer can not be read, the auxiliary tape measure 210 attached to one side of the base frame 100 is used to adjust the displacement amount of the elastic shoe 30 Can be read.

That is, by reading the scale of the auxiliary tape measure 200 from the boundary point (orthogonal bending point) between the vertical frame 120 and the horizontal frame 110 to the point indicated by the light of the laser pointer 420, The displacement amount (length) between the upper end portion and the lower end portion of the elastic shoe 30 can be accurately measured.

In this way, since the tape measure itself is wobbled or flowed in an undesired direction in the state where the tape measure itself is pulled out from the case in an uncomfortable posture of the worker, the worker's tape measure posture does not come out, The base frame 100 is placed on the lower plate 22 mounted on the coping portion 20 and the slide is moved in a state where the slide Only the simple operation of transferring the nipple 300 and the laser pointer 420 to the left and right can be performed. Therefore, the operator can accurately measure the displacement of the shoe in a comfortable posture during the bridge inspection work, , It is possible to prevent the safety accident by keeping the inspection posture stably to the operator.

FIG. 7 is a schematic view illustrating a method of measuring a displacement amount of a shoe using a shoe displacement amount measuring apparatus of a bridge according to the present invention, and shows an example of a displacement amount measurement using a steel shoe.

The worker closely contacts the base plate 100 on the side of the upper plate 12 mounted on the bottom of the girder 10 and reads the left and right distances L1 of the upper plate 12 through the auxiliary tape measure 210.

Subsequently, the base frame 100 is further moved to one side, and the distance L2 from the end of the upper plate 12 to the end of the coating portion 20 is read through the auxiliary tape measure 210.

Therefore, the distance from the end of the coping portion 20 to the center of the upper plate 12 is 2 / L1 + L2.

Subsequently, the operator attaches the base frame 100 to the side of the lower plate 22 mounted on the upper surface of the coping portion 20, and reads the lateral distance L3 of the lower plate 22 through the auxiliary tape measure 210 .

Subsequently, the base frame 100 is further moved to one side, and the distance L4 from the end of the lower plate 22 to the end of the coating portion 20 is read through the auxiliary tape measure 210.

The distance from the end of the coping portion 20 to the center of the lower plate 22 is 2 / L3 + L4.

Therefore, the amount of displacement in which the upper plate 12 is moved with respect to the lower plate 22 can be easily obtained through (L3-L1 / 2) + (L4-L2).

As described above, since only the lengths L1, L2, L3 and L4 described above are read using the apparatus for measuring the amount of displacement of shoe of the present invention in a stable posture, the displacement amount to which the steel shoe is applied can be accurately measured, It is possible to measure the amount of displacement of the operator in a stable position and to secure the safety of the inspector by moving away from the past method of measuring in a narrow space having a height of 20 cm or less between the girder and the coping portion.

Meanwhile, in the tape measure conveying passage 130, an anti-fouling coating layer coated with the anti-fouling coating composition may be formed so as to effectively prevent and remove the adhesion of contaminants. The antifouling coating composition contains boric acid and sodium carbonate in a molar ratio of 1: 0.01 to 1: 2, and the total content of boric acid and sodium carbonate is 1 to 10% by weight based on the total aqueous solution. In addition, sodium carbonate or calcium carbonate may be used as the material for improving the coating property of the anti-fouling coating layer, but sodium carbonate is preferably used.

The molar ratio of boric acid to sodium carbonate is preferably 1: 0.01 to 1: 2. If the molar ratio is out of the above range, the coating property of the base material is lowered or the moisture adsorption on the surface is increased.

The boric acid and sodium carbonate are preferably used in an amount of 1 to 10% by weight based on the total composition aqueous solution. If less than 1% by weight, the applicability of the tape drawer passage 130 deteriorates. If the content exceeds 10% by weight, The crystal precipitation is likely to occur.

On the other hand, as a method of applying the present anti-fouling coating composition onto a substrate, it is preferable to coat it by a spray method. In addition, the thickness of the final coated film of the tape drawer passage 130 is preferably 500 to 2000 Å, and more preferably 1000 to 2000 Å. When the thickness of the coating film is less than 500 ANGSTROM, there is a problem that it deteriorates in the case of a high-temperature heat treatment. When the thickness is more than 2000 ANGSTROM, crystallization of a coated surface tends to occur.

The present anti-contamination coating composition may be prepared by adding 0.1 mol of boric acid and 0.05 mol of sodium carbonate to 1000 mL of distilled water and stirring.

Also, the slide nipple 300 may be coated with a perfume material having a sterilizing function. The functional oil may be mixed with 95 to 97% by weight of a perfume and 3 to 5% by weight of a functional oil. The functional oil may contain 50% by weight of myrtle oil, And 50% by weight of a cube oil (Litsea cubeba oil).

Here, the functional oil is preferably mixed with 3 to 5% by weight based on the perfume. If the mixing ratio of the functional oil is less than 3% by weight, the effect is insignificant. If the mixing ratio of the functional oil exceeds 3 to 5% by weight, the function is not greatly improved, but the manufacturing cost is greatly increased.

The major chemical components of myrtle oil are cineol and myrtenol. It is extracted by steam distillation method in sprout and small branches. It is yellowish and has a refreshing and refreshing aroma. It has good effect on sterilization and side effects.

Litsea cubeba oil extracts oil from fruit using steam distillation method. It is sweet but similar to lemon grass. It has a strong aroma. It contains citral which is more than 85% as main chemical ingredient, linalol, neral, etc. It has a strong antiseptic effect, and it has excellent action effect of killing bacteria and the like by bactericidal action.

Since the functional oil is coated on the slide nipple 300, an excellent sterilization effect can be obtained, thereby preventing contamination of the slide nipple 300 and protecting the health of the operator.

The tape measure 200 may be formed of a steel material such as spring steel. In order to prevent corrosion of the surface of the tape measure 200 from dust and contaminants, a corrosion preventive coating layer is formed of a surface coating material of a metal material . The anti-corrosion coating layer is composed of 60 wt% of alumina powder, 30 wt% of NH ₄ Cl, 2.5 wt% of zinc, 2.5 wt% of copper, 2.5 wt% of magnesium and 2.5 wt% of titanium.

The alumina powder is added for the purpose of sintering, entangling, fusion prevention, etc. when heated to a high temperature. When such an alumina powder is added in an amount of less than 60% by weight, the effect of sintering, entangling and fusion prevention is deteriorated. When the alumina powder exceeds 60% by weight, the above effect is not further improved, but the material cost is greatly increased. Therefore, it is preferable to add 60 wt% of the alumina powder.

The NH ₄ Cl reacts with steam, aluminum, zinc, copper, and magnesium to activate diffusion and penetration. This NH ₄ Cl is added in an amount of 30% by weight. When NH ₄ Cl is added in an amount of less than 30% by weight, the reaction with aluminum, zinc, copper and magnesium in a vapor state is not properly performed, thereby failing to activate diffusion and penetration. On the other hand, if NH ₄ Cl exceeds 30 wt%, the above-mentioned effect is not further improved, but the material cost is greatly increased. Therefore, it is preferable to add 30 wt% of NH ₄ Cl.

The zinc is compounded to prevent corrosion of the metal that is in contact with water and to be used for electrical applications. 2.5% by weight of this zinc is mixed. If the mixing ratio of zinc exceeds 2.5% by weight, corrosion of the metal which is in contact with water can not be properly prevented. On the other hand, when the mixing ratio of zinc exceeds 2.5% by weight, the above-mentioned effect is not further improved, but the material cost is greatly increased. Therefore, it is preferable that zinc is mixed at 2.5% by weight.

The copper is combined with the aluminum to increase the hardness and tensile strength of the metal. This copper is mixed at 2.5% by weight. If the mixing ratio of copper is less than 2.5 wt%, the hardness and tensile strength of the metal can not be properly increased when combined with aluminum. On the other hand, when the mixing ratio of copper exceeds 2.5% by weight, the above-mentioned effect is not further improved, but the material cost is greatly increased. Therefore, copper is preferably mixed at 2.5% by weight.

Since the pure metal of magnesium has a low structural strength, it is used in combination with the zinc and the like to improve the hardness, tensile strength and corrosion resistance of the metal. This magnesium is mixed at 2.5% by weight. When the mixing ratio of magnesium is less than 2.5% by weight, the hardness, the tensile strength and the corrosion resistance to the salt water of the metal are not greatly improved when they are combined with zinc and the like. On the other hand, when the mixing ratio of magnesium exceeds 2.5% by weight, the above-mentioned effect is not further improved, but the material cost is greatly increased. Therefore, it is preferable that magnesium is mixed with 2.5% by weight.

The titanium is a lightweight, hard and corrosion resistant transition metal element with a silver-white metallic luster. Because it has excellent corrosion resistance and specific gravity, it weighs only 60% of steel. Therefore, the weight of the coating material applied to the metal base material is reduced, Excellent water resistance and corrosion resistance.

This titanium is mixed at 2.5% by weight. If the mixing ratio of titanium is less than 2.5% by weight, the weight of the coating material applied to the metal base material is not so reduced, and glossiness, water resistance and corrosion resistance are not greatly improved. On the other hand, when the mixing ratio of titanium exceeds 2.5% by weight, the above effect is not further improved, but the material cost is greatly increased. Therefore, titanium is preferably mixed at 2.5% by weight.

The method of applying the surface of the tape measure 200 according to the present invention is as follows.

In order to prevent the corrosion of the tape measure 200 inside the closed furnace, the coating material combined with the tape measure 200 to form the anti-corrosive coating layer and the coating material combined with the above constitution is put in the closed furnace, and argon gas And maintained at a temperature of 700 ° C to 800 ° C for 4 to 5 hours while the argon gas is injected.

Aluminum powder, alumina powder, zinc, copper, magnesium, and titanium compounds penetrate into the surface of the tape measure 200 by performing the above steps to form alumina powder, zinc, copper, magnesium, A corrosion preventive coating layer is formed.

After the corrosion-resistant coating layer is formed, the temperature inside the closed furnace is maintained at a temperature of 800 ° C. to 900 ° C. for 30 to 40 hours to form a corrosion-resistant coating layer on the surface of the base material, And ambient air. At this time, the abrupt temperature change in performing the above process may cause the coating layer on the surface of the tape measure (200) to be peeled, so that the temperature is changed at a rate of 60 ° C / hr.

The anti-corrosion coating layer of the present invention has the following advantages.

The anti-corrosion coating layer of the present invention has a very wide range of applications and can be applied by various methods such as curtain coating, spray painting, dip coating, flooding and the like.

In addition to the principle protection against corrosion and / or scale, the anti-corrosion coating layer of the present invention can be applied with a very thin layer thickness to improve electrical conductivity as well as material and cost savings. A thin electrically conductive primer may be applied to the top of the application layer if high electrical conductivity is desired after the hot forming process.

After the molding process or the hot forming process, the coating material can be retained on the surface of the substrate, for example, to increase scratch resistance, to improve corrosion protection, to meet aesthetic appearance, to prevent discoloration, And may be provided as a primer for conventional downstream processes (e.g., impregnated and electro-mobile dip application).

The present invention can prevent corrosion of the surface of the tape measure 200 due to dust, contaminants and the like because the tape measure 200 of the present invention is coated with a coating layer composed of alumina powder, NH ₄ Cl, zinc, copper, magnesium, .

10: Girder
12: upper plate
20:
22: Lower plate
30: Shoe
100: base frame
110: Horizontal frame
120: vertical frame
130: tape conveying passage
140: Slide hole
150: Fastening bolt
200: Tape measure
210: auxiliary tape measure
300: slide nipple
400: mounting frame
410: Slide groove
412: Light irradiation hole
420: laser pointer

Claims (3)

A base frame 100 having a horizontal frame 110 and a vertical frame 120 bent at right angles and having a tape conveying passage 130 formed therein and a slide hole 140 penetrating through the tape conveying passage 130;
A tape measure (200) transportably inhaled along the tape measure transfer passage (130);
And a slide nipple 300 fixed to a predetermined position of the tape measure 200 and exposed to the outside through a slide hole 140 of the base frame 100;
At the entrance of the slide hole (140) of the base frame (100), a stationary frame (400) for receiving a laser pointer (420) is slidably coupled;
A slide groove 410 is formed on both sides of the mounting frame 400 to receive the slide end of the slide hole 140. A light irradiation hole 412 through which the light of the laser pointer 420 is passed is formed in the lower plate, And the displacement of the bridge is measured.
delete A base frame 100 having a horizontal frame 110 and a vertical frame 120 bent at right angles and having a tape conveying passage 130 formed therein and a slide hole 140 penetrating through the tape conveying passage 130;
A tape measure (200) transportably inhaled along the tape measure transfer passage (130);
And a slide nipple 300 fixed to a predetermined position of the tape measure 200 and exposed to the outside through a slide hole 140 of the base frame 100;
An auxiliary tape measure 210 is further attached to one side of the base frame 100;
Wherein a tightening bolt (150) for fixing the tape measure (200) in the tape measure conveying passage (130) is attached to one side of the vertical frame (120).

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