KR20060041401A - Pin apparatus for measuring displacement of tunnel's inner surface - Google Patents

Abstract

The present invention relates to a pin apparatus for measuring the hole displacement of a tunnel. Pin displacement measuring apparatus of the present invention is an anchor body formed to be fixed to the object to be measured; Reflector plate or passive pin coupled to the anchor body; And a protective member coupled to the anchor and installed to cover at least one surface of the reflective plate or the passive pin. It is configured to include. Therefore, the protective member may block the zeolite generated during the blasting to protect the reflector and the passive pin.

Internal displacement, pin, reflector

Description

Pin device for measuring internal displacement {PIN APPARATUS FOR MEASURING DISPLACEMENT OF TUNNEL'S INNER SURFACE}

1 is a schematic perspective view for explaining the measurement of the hole displacement in a general tunnel

Figure 2 is a front view showing a conventional conventional target device for wave measurement

3 to 6 are diagrams showing the structure of an embodiment of the present invention.

Figure 3 is an exploded perspective view of the pin device for measuring the displacement displacement

Figure 4 is a perspective view of the state coupled pin device for measuring the displacement of the hole of Figure 3

5 is a perspective view of a state in which a pin apparatus for measuring displacement of the air hole of FIG. 3 is installed;

FIG. 6 is a conceptual diagram illustrating a method of measuring using an optical wave detector in a state where the pin displacement measuring device of FIG. 3 is installed.

** Description of the symbols for the main parts of the drawings **

110: anchor body 112: anchor coupling protrusion

120: base member 121: base plate

125: fixing hole 130: protective member

140: reflector plate assembly 141: reflector plate

150: manual pin

The present invention relates to a pin apparatus for measuring displacement of a hole in a tunnel, and more particularly, to a pin apparatus for measuring displacement of a hole, which prevents the reflector from being damaged by a zeolite generated during blasting.

When the tunnel is excavated to some extent by blasting or excavation work, it is necessary to check the ground of the tunnel by measuring the displacement of the hole in the tunnel. It is to secure the stability of the surrounding structure. Tunnel measurement is performed in the area of intragranular observation, measurement of pore displacement, and measurement of celestial settlement. First, intragranular observation is to observe morphological changes of rock, fault fracture, and shortcret support. It is to determine the stability of the tunnel by measuring the behavior of the cross section, and the measurement of the ceiling settlement is to determine whether the tunnel is in a stabilized state by measuring the displacement of the tunnel ceiling. The most important in the tunnel measurement is the measurement of the hole displacement and the measurement of the top-end settlement, and the results are used to determine the stability of the tunnel.

There are two methods of measuring the internal displacement: manual measurement using an anchor and an extensometer, and automatic measurement using an optical wave and a reflector.

In general, the optical wave measuring instrument is a device that obtains the coordinate distance between two points by measuring the phase difference of the reflected wave by modulating the light source as a carrier wave and continuously reflecting it on a special reflective prism. A machine that measures distance using light and radio waves is collectively called an electromagnetic measuring instrument. In particular, light wave measuring devices using light are widely used for general surveying because they are easier to handle and have higher precision than radio wave measuring devices using light waves.

1 is a schematic perspective view for explaining a hole displacement measurement of a general tunnel. As shown in FIG. 1, the target 12 is installed inside the tunnel 10, and the relative displacement is measured by irradiating light from the optical wave 14 to measure the internal displacement of the tunnel 10. The target 12 is not to be changed position by artificial external force other than the behavior of the surrounding ground, and should not be destroyed by blasting or digging. In rock tunnel measurement, the key is to install within 12 hours after blasting to calculate the correct initial value and to find out the exact behavior.

Figure 2 is a front view showing a conventional conventional target for distance measurement. As shown in FIG. 2, the reflective prism 22 is fixed to one side of the support 20, and the fixing part 24 is formed on the other side of the support 20. In the conventional conventional conventional target measuring device configured as described above, a hole is drilled to insert a fixing part of the target device at a point to be measured, and then the target device is fixed by using grouting or resin or cement mortar. The reflector plates at both ends are fixed with an optical wave and their relative displacement is measured. And in the case of the structure can be bolted or welded through holes.

However, the conventional conventional target for distance measurement is insufficient to safely protect the reflective prism due to debris scattered during the blasting operation.

Conventional target devices have been tried to prevent rock fragments scattered during blasting by using a protector to prevent damage due to blasting or digging, but the situation is not getting much effect. As the conventional target device is repeatedly mounted and removed, the use of the target device is very inconvenient, and there is a problem in that the installation position is changed to obtain accurate measurement values.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a pin apparatus for measuring the displacement of pores, which prevents the reflection plate from being damaged by the zeolite generated during blasting.

The present invention is an anchor body formed to be fixed to the object to be measured, in order to achieve the object as described above; A reflection plate coupled to the anchor body; And a protective member coupled to the anchor body and installed to cover at least one surface of the reflective plate to be exposed. It provides a pin device for measuring the displacement displacement including a.

Therefore, damage of the reflecting plate can be prevented by the protection member blocking the monument which is scattered by the blasting.

Here, the end is formed so as to be coupled to the extensometer, the passive pin coupled to the anchor body; It is preferable to further include. Therefore, not only the three-dimensional displacement can be measured using the reflector, but also the two-dimensional displacement can be measured using the passive pin as necessary.

On the other hand, the end of the passive pin may be formed in a ring shape.

And, the base member coupled to the upper end of the anchor body; It further comprises, The reflecting plate and the protective member is preferably coupled to the opposite surface of the anchor body of the reflecting plate.

In addition, it is effective that the base member is formed through the fixing hole to be fixed to the inner wall of the tunnel. Therefore, even if a strong impact is applied to the protection member, the base member can be prevented from bending.

And, it is effective that the protective member and the base member are detachably coupled. Therefore, the protection member can be easily removed if necessary, thereby increasing the work efficiency.

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

However, in describing the present invention, a detailed description of known functions or configurations will be omitted in order not to disturb the gist of the present invention. In addition, detailed description about the same and the same part as the above-mentioned structure is abbreviate | omitted.

3 to 6 is a view showing the structure of an embodiment of the present invention, Figure 3 is an exploded perspective view of the pin displacement measuring apparatus for internal displacement, Figure 4 is a perspective view of a state coupled to the pin displacement measuring apparatus of Figure 3 5 is a perspective view of a state in which the pin displacement measuring apparatus of FIG. 3 is installed, and FIG. 6 is a conceptual view illustrating a method of measuring using a light waver in a state in which the pin displacement measuring apparatus of FIG. 3 is installed.

As shown in these drawings, the pinhole measurement device 100 for the internal displacement measurement according to the embodiment of the present invention is inserted into the anchor body 110 and the body of the anchor body 110 formed to be fixed to the object to be measured. Of the base member 120 coupled to the opposite end of the end, the reflector plate coupling body 140 coupled to the opposite surface of the anchor body 110 of the base member 120, and the anchor body 110 of the base member 120. Passive pins 150 coupled to the opposite side, and the protection member 130 coupled to the base member 120 to protect the reflector plate assembly 140 and the passive pins 150 from the monument.

As described above, the anchor body 110 is a device for fixing the pin displacement measuring device to the object to be measured, and is formed of reinforcing bars as shown for grouting, or an expandable shell anchor or steel. It may be formed of an 'I' type bolt that can be coupled to the beam. In the embodiment of the present invention, but the reinforcing bar to be inserted into the inner wall of the tunnel, it can be converted into various types for coupling to the object to be measured.

The anchor coupling protrusion 112 is formed on the upper end of the anchor body 110 to protrude in the longitudinal direction of the anchor body 110 to have a smaller diameter than the anchor body 110, and the threaded portion on the lower outer peripheral surface of the anchor coupling protrusion 112 The threaded portion 112a is formed. In addition, the locking step 113 is formed by the difference between the diameter of the anchor coupling protrusion 112 and the anchor body (110).

The base member 120 is an anchor body insertion hole 122 for coupling with the anchor body 110 to the plate-shaped base plate 121, the manual pin coupling hole 123 for coupling with the manual pin, and a protective member And a protection member coupling hole 124 for coupling with the fixing member 125 and a fixing hole 125 for fixing the base plate 121 to the inner wall of the tunnel to reinforce the bending of the base plate 121 by the impact. .

The fixing hole 125 is formed adjacent to the four corners of the base plate 121, the anchor body insertion hole 122 is formed in the center of the base plate 121, the protective member coupling hole 124 is inserted into the anchor body It is formed spaced apart in one direction from the ball 122, the passive pin coupling hole 123 is formed in the opposite direction of the protective member coupling hole 124 based on the anchor body insertion hole 122. However, this arrangement can be changed according to design convenience.

The protection member 130 is perpendicular to the opposite surface (hereinafter referred to as the 'top surface') of the anchor body 110 coupling surface of the base plate 121 to the reflector plate coupling member 140 and the passive pin 150 to the headstone. Protection portion 131 to protect from, the lower support portion 132 for coupling with the base plate 121, and the lower support portion 132 is composed of a bolt 134 for coupling the protective member coupling hole 124.

The protection part 131 is formed by bending the iron plate, and the lower support part 132 is formed by folding the end of the base plate 121 side of the protection part 131.

The reflector plate assembly 140 includes a reflector plate support frame 142 formed in a 'U' shape, a reflector plate 141 coupled between the reflector plate support frame 142, and a base plate 140 of the reflector plate support frame 142. It is composed of a lower coupling portion 143 coupled to the base plate side (hereinafter referred to as 'lower').

The lower coupling portion 143 is formed through the insertion hole (not shown) through which the anchor coupling protrusion 112 is inserted at the lower side thereof, and the fastening screw 144 is coupled to be tightened through the side surface of the insertion hole. The fastening screw 144 may fix the side surface of the anchor coupling protrusion 112 inserted into the insertion hole.

Between the reflector plate assembly 140 and the base plate 121 is coupled to the screw portion (112a) of the anchor coupling protrusion 112 penetrated through the anchor body insertion hole 122 to the base plate 121 to the anchor body 110. Fixing anchor fixing nut 115 is coupled.

Passive pin 151 is composed of a base coupling portion 151 of the lower portion and the extension system coupling portion 152 of the upper portion. The lower surface of the base coupling portion 151 is provided with a coupling hole formed with a screw thread on the inner peripheral surface so that the manual pin coupling screw 112 can be coupled. The elongation coupler 152 may have threads formed on the outer circumferential surface thereof, and the extensometer may be coupled thereto.

In the present embodiment, the extension-type coupling part is formed as a thread, but may be formed in a ring shape.

Hereinafter, the assembly method and operation of the embodiment of the present invention will be described.

First, the protection member 130 is fastened to the base plate 121 by bolts 134, and the manual pin 150 is also fixed by the manual pin coupling screw 153 and the washer 154.

The anchor body 110 is inserted into the inner wall of the tunnel and then grouted to fix it. Next, the anchor coupling protrusion 112 is inserted into the anchor body insertion hole 122 of the base plate 121 and fixed with the anchor fixing nut 115. At this time, the protection member 130 is directed in the direction in which the monument due to the blasting of the tunnel fly.

Next, the anchor coupling protrusion 112 protruding above the anchor fixing nut 115 is inserted into the insertion hole formed in the lower coupling portion 143 of the reflector plate assembly 140, and then, the screw is fixed to secure the reflector plate assembly 140. do.

Next, the fixing hole 125 is fixed to the inner wall of the tunnel using a separate anchor bolt 160 or a wire.

As described above, the assembled pin displacement measuring apparatus can protect the reflecting plate 141 and the passive pin 150 by colliding with the protection member 130 even when the zeolite generated by the blasting is blown off. Thus, not only economic loss can be prevented, but accurate measurement is also possible.

In addition, by providing the reflective plate 141 and the passive pin 150 on one anchor body 110, three-dimensional measurement and two-dimensional measurement can be performed simultaneously. Therefore, there is an advantage that it is much more economical than when installed separately.

In addition, by providing the fixing hole 125 in the base plate 121, the base plate 121 is not bent under strong impact of the zeolite, and thus the reflector plate and the passive pin can be protected more efficiently.

Then, the protective member 130 is coupled to the base plate 121 by a bolt so as to be detachable, so that when in the position of I of FIG. When it is in the II position, the protection member 130 can be removed and then measured, thereby reducing the inconvenience of having to reinstall the pin displacement measuring apparatus.

According to the embodiment of the present invention as described above, various effects including the following matters can be expected. However, the present invention is not achieved by exerting all of the following effects.

First, the pin deflection measuring device according to the present invention is provided with a protective member, it is possible to prevent damage caused by the zeolite generated by the blasting of the reflector and the passive pin.

In addition, since the pin deflection measuring device of the present invention includes both a reflecting plate and a passive pin, three-dimensional measurement and two-dimensional measurement can be simultaneously performed using one anchor, thereby reducing installation cost.

In addition, since the protective member is detachably coupled, the protective member can be attached and detached according to the position, thereby increasing the efficiency of the work.

Although the preferred embodiments of the present invention have been described above by way of example, the scope of the present invention is not limited to these specific embodiments, and may be appropriately changed within the scope of the claims.

Claims (11)

An anchor formed to be fixed to the object under test; A reflection plate coupled to the anchor body; And A protection member coupled to the anchor and installed to cover at least one surface of the reflection plate; Pin displacement measuring apparatus for internal voids comprising a. The method of claim 1, An end is formed to be coupled to the extensometer, the passive pin coupled to the anchor body; Pin displacement measuring device for pneumatic displacement further comprising a. The method of claim 2, The end of the passive pin is a pin device for measuring the displacement displacement, characterized in that formed in a ring shape. The method of claim 1, A base member coupled to an upper end of the anchor body; More, The reflector plate and the protective member is a pin apparatus for measuring the internal displacement displacement, characterized in that coupled to the opposite surface of the anchor body of the reflector. The method of claim 4, wherein An end portion formed to be coupled to a passive hole displacement meter, and a passive pin coupled to the base member; Pin displacement measuring device for pneumatic displacement further comprising a. An anchor formed to be fixed to the object under test; An end is formed to be coupled to the extensometer, the passive pin coupled to the anchor body; A protection member coupled to the anchor and installed to cover at least one surface of the passive pin; Pin displacement measuring apparatus for internal voids comprising a. The method of claim 7, wherein A base member coupled to an upper end of the anchor body; More, The passive pin and the protective member is a pin device for measuring the internal displacement displacement, characterized in that coupled to the opposite surface of the anchor body of the reflecting plate. The method according to any one of claims 4 to 7, The anchoring device and the pin member for measuring the displacement displacement, characterized in that the base member is screwed. The method according to any one of claims 4 to 7, The base member has a pin hole for measuring the displacement displacement, characterized in that the fixing hole is formed so as to be fixed to the inner wall of the tunnel. The method according to any one of claims 4 to 7, The protective member and the base member is a pin device for measuring the displacement displacement, characterized in that coupled to the removable. The method of claim 10, The protective member and the base member is a pin device for measuring the displacement displacement, characterized in that the screw coupling.

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