KR101410907B1 - Subsidence measurement system for using anchor and method for measuring thereof - Google Patents

Abstract

A subsidence measurement system using an anchor and a subsidence measurement method using same provided in the present invention include a steel rod that is disposed to be inserted into a subsidence measuring hole and extend to a fixed point; an elastic wing that is provided at a lower end of the steel rod, is formed of an elastic material, and fixes the lower end of the steel rod to the fixed point to be elastically supported; an anchor that is disposed to be capable of a vertical movement in the steel rod, and is inserted into and fixed to an inner wall of the subsidence measuring hole when put into operation; and a subsidence rod that is connected to the anchor to extend upward, and is disposed to be capable of a vertical movement with the anchor. Accordingly, in the present invention, the steel rod that is disposed in the subsidence measuring hole is fixed to be elastically supported at the fixed point by the wing having elasticity, and thus a buffering operation against an external force can be performed. Also, a movement of the fixed point is suppressed so that the accuracy of a subsidence displacement value is increased. In addition, the subsidence rod that is connected to the anchor is primarily protected by a protection pipe, and thus a horizontal displacement of the subsidence rod, which is attributable to the collapse of the inner wall of the subsidence measuring hole, can be prevented. Therefore, the error of the subsidence displacement value can be decreased by accurately reflecting the vertical movement of the subsidence rod, and the protection pipe is supported by an elastic member so that a relaxation area, in which the displacement secondarily generated in the subsidence rod can be converged, can be ensured and the reliability of the subsidence displacement value can be increased.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a subsidence measurement system using an anchor, and a subsidence measurement method using the same.

The present invention relates to a settlement measuring system and method, and more particularly, to a settlement measuring system using an anchor configured to increase the accuracy of settlement measurement and a settlement measuring method using the anchor.

In general, the ground is deformed due to various factors such as subsidence or elevation, and such deformation is very large in, for example, soft ground or clay ground. Especially when designing and constructing buildings including civil works in places where subsidence of the ground is expected, the structures tend to be inclined or cracked, causing damages such as water pipes and gas pipes being displaced.

For this reason, by measuring the subsidence of the surrounding ground under construction, it is possible to prevent direct or indirect damage that may occur in various forms, or to measure the subsidence of the structure already dried to maintain the stability of the structure do.

As a technique related to conventional settlement measurement, there is an apparatus and a method for measuring the underground subsidence in Korean Patent Laid-Open No. 10-2013-0000681. Such conventional techniques include a plurality of anchors which are inserted at different depths with reference to the ground surface and are fixed at different heights on the ground around the settlement measuring holes through fixing means, A non-stretchable joint member connected to the anchor, a behavior guide pipe for protecting the non-stretchable joint member to be moved by the anchor, and a movement guide pipe provided on the ground and connected to the non-stretchable joint member, And a data logger for converting data measured by the length displacement meter into display and settlement displacements, wherein when the anchor is depressed, the length displacement meter The settlement of the stratum is measured based on the change in length applied to the stratum.

A conventional settlement measurement method using a similar method will now be described with reference to the drawings.

1 to 3 are views for explaining a settlement measurement method using a conventional anchor.

As shown in Fig. 1, the sinking measurement hole 2 is drilled in the ground 1 to a certain depth. At this time, the settlement measurement holes 2 are drilled in the ground 1 so as to extend to the float points of the passive layer 1d, which is a reference, through the plurality of strata 1a, 1b and 1c.

2, when the drilling of the sinking measurement hole 2 is completed, a plurality of anchors 3 are installed on the sinking measurement hole 2 so as to be connected to the sinking rod 4 at different depths, The grouting solution 5 is injected into the hole 2 to fill it. At this time, the settlement rod 4 is connected to the measuring unit 6 located on the ground 1.

3, when the installation of the anchor 3 is finished, the water pressure is supplied to the anchor 3 to push the anchor 3 into the inside of the sinking measurement hole 2 so as to unfold the ground layer 1a, 1b , 1c. When the fixing of the anchor 3 is finished, the settlement of the ground 1 is measured on the measuring part 6. [

However, such a conventional settlement measurement method has a problem in that it is difficult to control the ratio of water by using the grouting liquid 5, for example, bentonite suspension liquid. That is, when the ratio of the water is high, the grouting liquid 5 may cause cavitation at an upper point of the settlement measuring hole 2 during the measurement, and when the water ratio is low, So that it can affect the settlement of the anchor 3 at the time of micro-settlement.

Further, in the conventional settlement measurement method, the lowest anchor 3 becomes a floating point when the measurement data is rearranged, and the rising or sinking of another anchor 3 is caused by the change of the floating point due to the influence of external force, And the accuracy of the value is decreased.

Also, the conventional settlement measurement method has a problem that the settlement rod 4 generates a displacement in the horizontal direction due to the collapse of the side wall 7 of the settlement measurement hole 2, thereby causing a large error to the vertical displacement measurement value .

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to eliminate the inaccuracy of the settlement displacement value due to the change of the floating point and to reduce the error of the settlement displacement value due to the collapse of the inner wall of the settlement measuring hole And an object of the present invention is to provide a settlement measurement system using an anchor for increasing the reliability of the settlement displacement measurement and a settlement measurement method using the anchor.

In order to achieve the above object, a settlement measuring system using an anchor provided in the present invention is a steel bar inserted into a settlement measuring hole and installed to extend to a floating point. An elastic blade provided at the lower end of the steel rod and made of an elastic material and fixing the lower end of the steel rod to the floating point so as to be elastically supported; An anchor which is installed on the steel bar so as to be vertically movable and is inserted and fixed in the inner wall of the settlement measuring hole by operation; And a lowering rod connected to extend upwardly to the anchor and installed to be movable up and down together with the anchor.

Preferably, the elastic blade is formed of a leaf spring extending radially to the outer surface of the lower end of the steel bar, and is provided along the lower end of the steel bar.

And a protection member installed on the elastic blade so as to surround the lower end of the steel bar to protect the lower end of the steel bar.

The protector is preferably installed between the elastic wings arranged vertically at the lower end of the steel bar so as to be vertically stacked.

A protective tube installed to surround the lowering rod; And an elastic fixing member fixed to the anchor to be coupled to the protective pipe and made of an elastic material so as to converge the displacement of the anchor.

And the elastic fixing member is fixed to one or both of the upper side and the lower side of the anchor, and the elastic pipe is fixed to the upper side of the anchor and the upper side of the anchor, It is preferable to be fitted and attached to the end.

And a measuring unit fixed to the upper end of the steel bar and connected to the lowering rod to measure the displacement of the ground layer.

The method for measuring settlement using an anchor provided in the present invention comprises the steps of: drilling a settlement measuring hole to reach a floating point in a ground; Inserting a steel bar provided for allowing an anchor to move up and down in the sinking measuring hole and fixing the steel rod so as to be elastically supported at the floating point by an elastic blade provided at the lower end; And a step of operating the anchor to fix it so as to be inserted into the inner wall of the settlement measuring hole; and measuring a displacement of the ground through the settlement rod connected to the anchor so as to extend upward.

Wherein the step of fixing the steel rods comprises the step of radially extending the elastic wings made of leaf springs to the lower end outer side surface of the steel rods so that the elastic wings are provided along the lower end of the steel rods, And the lower end of the steel rod is protected by a protection member provided on the elastic blade so as to surround the lower end of the steel rod.

And a plurality of anchors are installed on the steel rods so that the anchors are located at different depths from each other. A protective pipe surrounding the anchoring rods is coupled to an elastic fixing member fixed to the anchors, It is preferable to be provided between the anchor and the ground surface.

The settlement measurement system using the anchor according to the present invention and the settlement measurement method using the anchor have the following effects.

First, the steel rod installed in the settlement measuring hole is fixed so as to be resiliently supported at the floating point by the elastic wing, so that it can buffer the external force and restrain the movement of the floating point to increase the accuracy of the settlement displacement value. do.

Second, since the subsurface rope connected to the anchor is primarily protected by the protective pipe, horizontal displacement of the subsurface rod due to the collapse of the inner wall of the subsurface measurement hole is prevented, and the error of the subsurface displacement value can be reduced by accurately reflecting the vertical motion of the subsurface rod.

Third, since the protective pipe is supported by the elastic member, it is possible to increase the reliability of the settlement displacement value by securing a relaxation region that can converge the displacement generated in the settlement rod secondarily.

1 to 3 are sectional views for explaining a settlement measurement method using a conventional anchor.
4 to 6 are cross-sectional views illustrating a settlement measurement method using a settlement measurement system using an anchor according to an embodiment of the present invention.
7 is a side sectional view showing an elastic blade of a settlement measuring system using an anchor according to an embodiment of the present invention;
8 is a side cross-sectional view illustrating a structure of a protective pipe installation of a settlement measurement system using an anchor according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

4 and 6 are cross-sectional views illustrating a settlement measurement method using a settlement measurement system using an anchor according to an embodiment of the present invention. Referring to FIGS. 5 and 6, The settlement measuring system 100 using the above-described method will be described as follows.

5 and 6, a settlement measuring system 100 using an anchor according to an embodiment of the present invention includes a steel bar 110, an elastic blade 120, an anchor 130, 140).

The steel rod 110 is inserted into the settlement measuring hole 20 and is installed to extend to a point in the rock layer 14 such as a floating point 15 such as weathered rock, And a stainless steel pipe having a diameter of about 15 mm, for example, so that corrosion resistance can be improved.

The elastic blade 120 is provided at the lower end 111 of the steel rod 110 and is made of an elastic material and fixes the lower end 111 of the steel rod 110 to the floating point 15 so as to be elastically supported. Alternatively, the steel rods 110 may be integrally formed with the same diameter as the lower ends 111. Alternatively, as in the present embodiment, the members having the enlarged diameter may be provided integrally so that the elastic wings 120 may be bolted, And the like can be provided.

The anchor 130 is installed on the steel bar 110 so as to be vertically movable, and is inserted into the inner wall of the settlement measuring hole 20 by operation. The anchor 130 may be slidably coupled to the steel rod 110 such that the steel rod 110 can move up and down in the vertical direction. So as to be vertically movable.

The anchor 130 can be fixed so that the ground 10 is integrated with the inner wall of the downfalling measurement hole 20 by expanding or spreading the tip portion, the blade, the extension portion, or the like in the width direction by driving various kinds of actuators For example, a hydraulic anchor operated by water pressure supplied from a water pressure supply portion on the ground through a cable. Also, the anchor 130 may be installed at a plurality of depths in the sinking measurement hole 20, as in the present embodiment, and may be configured to measure the subsidence of the strata 11, 12, and 13, respectively.

The settlement bar 140 is connected to the anchor 130 so as to extend upward and is fixed to each of the anchors 130 so that the anchor 130 can move up and down together with the anchor 130.

The measuring unit 180 may be fixed to the upper end of the steel bar 110. The measuring unit 180 is connected to each of the settlement rods 140 to measure the displacement of the stratum 11,12,13 and is fixed to the upper end of the steel rod 110 so that the distance between the float points 15 is constant , Which contributes to improving the accuracy of the settlement displacement measurement.

The measuring unit 180 detects a change in the length of the ground 10 due to the subsidence of each of the ground layers 11, 12 and 13 through a sensor such as a length displacement measuring device, The settlement displacement value can be calculated by outputting the measured value of the settlement rod 140 to the information processing apparatus, or as another example, by confirming the up and down movement of the settlement rod 140. Further, the measurement unit 180 can obtain the settlement displacement for each of the stratum 11, 12, 13 through the measurement for each of the settlement rods 140.

7, the resilient vane 120 may be formed of a leaf spring that is radially extended on the outer surface of the lower end 111 of the steel bar 110, and the leaf spring may be floated In order to stably fix the lower end 111 of the steel rod 110 in the rock layer 14 which is the point 15 such as the weathered rock and make it relatively easy to downwardly insert, And the end portion may be in line contact or face contact with the inner wall of the floating point 15. [ The elastic wings 120 may be provided along the lower end 111 of the steel rod 110 in a plurality, for example, two, three, four, or the like.

The elastic blade 120 may be provided with a protective material 150 so as to surround the lower end 111 of the steel rod 110.

The protective member 150 may be attached to the elastic blade 120 or may be fitted and fixed between a plurality of elastic blades 120 to be described later and surrounded by the lower end 111 of the steel rod 110, The lower end 111 of the steel rod 110 is protected from collapse of the inner wall around the floating point 15 while being separated from the outer surface of the lower end 111 of the floating point 15.

The protective member 150 may be made of a hollow tube having a thickness of about 10 mm and may have various structures for protecting the lower end 111 of the steel rod 110 around the lower end 111. For example, Rubber, silicon, or the like, or made of a synthetic resin such as PCV or a metal or metal alloy pipe. The protective member 150 is installed between the elastic blades 120 that are vertically arranged on the lower end 111 of the steel rod 110 as in the present embodiment so that the protective material 150 can be stacked in a plurality of up and down directions, And can perform a protection function over the entire display device 110.

5 and 6, a protective pipe 160 may be installed around the settlement rod 140 and the protective pipe 160 may be fixed to the elastic fixing member 170 fixed to the anchor 130 .

The protective pipe 160 may be a hollow tube for enclosing the settlement rod 140 and accommodating the settlement rod 140 in the inner side by locating all of the settlement rod 140 inside, As shown in Fig. The protective pipe 160 may be made of a synthetic resin such as PVC having a diameter of about 60 mm or a pipe made of a metal or a metal alloy and the inner wall of the settlement measuring hole 20 may have a horizontal displacement Prevention. In order to install the protection pipe 160 over most of the area of the sinking measurement hole 20 as in the present embodiment, the protection pipe 160 is installed between the anchors 130 installed to be different in depth from each other, Respectively.

The elastic fixing member 170 is fixed to the anchor 130 so as to be coupled to the protective pipe 160. The elastic fixing member 170 is made of an elastic material such as polyurethane, rubber, silicone, or the like so as to be able to converge the displacement of the anchor 130, A synthetic resin having elasticity, and the like. The elastic fixing member 170 may have a tubular shape and may be fixed to the inside or the outside of the protective pipe 160 in a manner such as adhesion by an adhesive or interference fit by a bolting or fitting structure, 160, respectively, and may be fitted to the end of the protective pipe 160 and attached to the anchor.

8, the protection tube 160 can converge the displacement of the anchor 130 together with the settlement rod 140 due to the elasticity of the elastic fixing member 170, and in order to secure it more stably, And may be fixed to the elastic fixing member 170 so as to be spaced apart from the anchor 130 by a predetermined distance d.

4 to 6, a settlement measurement method using an anchor according to another embodiment of the present invention will be described as follows. In the same manner as the settlement measurement system 100 using an anchor according to an embodiment of the present invention, The description of which will be omitted.

As shown in FIG. 4, the sinking measuring hole 20 is first drilled in the ground 10 to reach the floating point 15 using a punching machine such as an auger. At this time, the floating point 15 may be a rock layer 14 such as weathering or the like and may be drilled to pass through a plurality of strata 11, 12 and 13 including an earth surface.

5, when the drilling of the sinking measurement hole 20 is completed, the steel rod 110 installed to allow the anchor 130 to move up and down is inserted into the sinking measurement hole 20, Is fixed to the floating point (15) by elastic wings (120) provided at the lower end (111). On the other hand, filling of the grouting solution with respect to the sinking measurement hole 20 may be omitted, but the filling operation of the grouting solution may be performed if necessary.

In the step of fixing the steel rod, the elastic blade 120 formed of the leaf spring is radially extended on the outer surface of the lower end 111 of the steel rod 110, and the elastic blade 120 is fixed to the lower end The lower end 111 of the steel rod 110 is elastically supported and fixed in a plurality of directions by the elastic blade 120 so that the lower end 111 of the steel rod 110 is fixed around the lower end 111 of the steel rod 110 The lower end 111 of the steel rod 110 can be protected by the protection member 150 provided on the elastic blade 120 so as to surround the lower end 111 of the elastic rod 120. In addition, in the step of fixing the steel rods, a plurality of anchors 130 may be provided on the steel rods 110 so as to correspond to the ground layers 11, 12 and 13 at different depths from each other, A protection pipe 160 surrounding the anchor 130 may be installed between the anchors 130 and between the anchor 130 and the ground surface by being coupled to the elastic fixing member 170 fixed to the anchor 130.

6, when the fixing of the steel rod 110 to the sinking measurement hole 20 is completed, the anchor 130, for example, a hydraulic anchor is operated to extend or unfold the width of the sinking measurement hole 20, And is fixed so as to be integrated with the ground layers 11, 12, and 13.

When the anchor 130 is fixed, the displacement is measured with respect to each of the ground layers 10, for example, the ground layers 11, 12 and 13, through the settlement rod 140 connected to the anchor 130 so as to extend upward. At this time, it is possible to measure the settlement displacement value by using the sensor by the measuring unit 180 described above or by manual operation.

According to the settlement measurement system using an anchor and the settlement measurement method using the anchor according to the present invention, the steel bar installed in the settlement measurement hole is fixed so as to be resiliently supported at the floating points by the elastic wings so as to buffer the external force And the movement of the floating point is suppressed to increase the accuracy of the settlement displacement value. In addition, since the subsurface rod connected to the anchor is primarily protected by the protective pipe, the horizontal displacement of the subsurface rod due to the collapse of the inner wall of the subsurface measurement vessel can be prevented, and the error of the subsurface displacement value can be reduced by accurately reflecting the up- have. Further, since the protective pipe is supported by the elastic member, a relaxation region that can converge the displacement generated in the submerged rod can be securely secured, thereby increasing the reliability of the settlement displacement value.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

10: ground 11, 12, 13: strata
14: rock layer 15: floating point
110: steel rod 111: bottom
120: elastic wing 130: anchor
140: Deposition rod 150: Protection material
160: Protection tube 170: Elastic fixture
180:

Claims (10)

A steel rod inserted into the settlement measuring hole and extending to a floating point;
An elastic blade provided at the lower end of the steel rod and made of an elastic material and fixing the lower end of the steel rod to the floating point so as to be elastically supported;
An anchor which is installed on the steel bar so as to be vertically movable and is inserted and fixed in the inner wall of the settlement measuring hole by operation; And
A lowering rod connected upwardly to the anchor and vertically movable together with the anchor;
Wherein the aberration measuring unit is configured to measure the aberration of the anchor. [2] The apparatus according to claim 1,
And a plurality of plate springs extending radially outwardly from the lower end outer surface of the steel bar, the plurality of plate springs being provided along the lower end of the steel bar. The settlement measuring system using an anchor according to claim 2, further comprising a protection member installed to surround the lower end of the steel bar on the elastic blade and protecting the lower end of the steel bar. 4. The apparatus according to claim 3,
And the plurality of elastic wings are vertically stacked on the lower end of the steel bar. The apparatus of any one of claims 1 to 4, further comprising: a protective pipe installed to surround the lowering rod; And
An elastic fixing member fixed to the anchor so as to be coupled to the protective pipe and made of an elastic material so as to converge the displacement of the anchor;
Further comprising: an anchor-based measurement unit for measuring an anchor; [7] The apparatus according to claim 5,
Between the anchors installed so as to be different in depth from each other and between the anchors installed on the uppermost stage and the ground surface,
The elastic fixing member may include:
Wherein the anchor is fixed to one or both of an upper side and a lower side of the anchor, and is attached to the end of the protection pipe. The settlement measuring system using an anchor according to any one of claims 1 to 4, further comprising a measurement unit fixed to an upper end of the steel bar and connected to the subsurface to measure a displacement of the ground layer. Drilling the settlement measuring hole into the ground so as to reach a floating point;
Inserting a steel bar provided for allowing an anchor to move up and down in the sinking measuring hole and fixing the steel rod so as to be elastically supported at the floating point by an elastic blade provided at the lower end;
Operating the anchor to be inserted into the inner wall of the sinking measurement hole;
Measuring a displacement of the ground through a subsidence rod connected to the anchor so as to extend upward;
And measuring the settlement using the anchor. The method as claimed in claim 8,
Wherein the elastic wings made of leaf springs extend in the radial direction on the lower end outer side surfaces of the steel rods so that a plurality of elastic wings are provided along the lower end of the steel rods so that the lower ends of the steel rods And the lower end of the steel rod is protected by a protection member provided on the elastic blade so as to surround the lower end of the steel rod. The method as claimed in claim 8 or 9,
A plurality of anchors are installed on the steel rods so that the anchors are positioned at different depths from each other, and a protective pipe surrounding the lowering rod is coupled to an elastic fixing member fixed to the anchor, thereby providing an anchor between the anchors, So as to obtain a settlement measurement using an anchor.

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