KR101729415B1 - Apparatus and method for measurement of ground settlement - Google Patents

Apparatus and method for measurement of ground settlement Download PDF

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Publication number
KR101729415B1
KR101729415B1 KR1020150151867A KR20150151867A KR101729415B1 KR 101729415 B1 KR101729415 B1 KR 101729415B1 KR 1020150151867 A KR1020150151867 A KR 1020150151867A KR 20150151867 A KR20150151867 A KR 20150151867A KR 101729415 B1 KR101729415 B1 KR 101729415B1
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South Korea
Prior art keywords
pipe
measured
measuring
inner pipe
teletail
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KR1020150151867A
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Korean (ko)
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송명준
송영훈
정민형
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현대건설주식회사
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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
    • G01B5/30—Measuring arrangements characterised by the use of mechanical techniques for measuring the deformation in a solid, e.g. mechanical strain gauge
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V9/00—Prospecting or detecting by methods not provided for in groups G01V1/00 - G01V8/00

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to an apparatus and method for measuring ground subsidence. According to an aspect of the present invention, there is provided a ground settlement measuring apparatus for measuring a settlement amount of an object to be measured, the apparatus comprising: a beam horizontally installed on a lower surface of the object to be measured; An outer pipe vertically installed on the beam; An inner pipe vertically installed inside the outer pipe; A teltel installed in a vertical direction inside the inner pipe; And a displacement measuring device measuring a vertical displacement of the teletail to determine a settlement amount of the object to be measured, wherein a lower end of the inner pipe and the teltel are fixed to an upper surface of the beam, As shown in Fig.

Description

TECHNICAL FIELD [0001] The present invention relates to an apparatus for measuring ground settlement,

More particularly, the present invention relates to a ground settlement measuring apparatus and a ground settlement measuring apparatus capable of measuring a ground settlement amount due to a foundation self weight, which occupies a large load, as well as a ground settlement amount by a structure applied on a foundation And a measurement method.

The foundation of the construction field is a structure that transfers the upper loads of the structures such as bridges and buildings to the ground. The foundation is composed of a foundation plate and a pile according to the load and the ground conditions. It is necessary to control the subsidence within the reference value in the design and construction stage in order to ensure the stability and usability of the structure, and the displacement caused by the load due to the superstructure and the load of the foundation itself occurs.

  In general, the foundation settlement is small in size, and since many bases are buried in the ground, it is difficult to measure the settlement amount accurately, and development of a method of measuring the foundation settlement is slow. However, as the concept of economic basic design has recently expanded, the notion that the foundation is able to withstand the ground is designed to match the settlement amount of the structure like the pile support foundation foundation. Therefore, Data security is becoming important.

  The settling amount of the foundation can be measured by using the settlement target and the light wave and the level, but in this case, the settlement on the ground and the structure embedded in the ground can not be measured. The following can be applied by the settlement measurement method which can overcome this.

  Korean Patent No. 10-0571171 discloses a ground settlement measuring apparatus which fixes the measuring apparatus at a desired depth of the settlement after boring. The rod passing through the center of the measuring device is connected to the upper ground subsidence plate. When the ground subsides, the load sinks as well, and the change amount of the load that the measuring device sinks is calculated by a mechanical method using a toothed wheel. However, the present invention has a problem that the boring cost for installation of measurement equipment and measuring equipment is very high, and boring is not possible in the basic construction conditions, in a similar manner to the existing automatic floor-standing sinking system.

  In addition, Korean Patent No. 10-0670976 discloses an apparatus for measuring ground settlement using a dredger, which fixes an anchor connecting a steel wire to a lower end of a ground without sinking after boring and changes the length of the steel wire by sinking, . And settlement amount is calculated by measuring the potential difference according to the change of the pulley connected to the steel wire. The present invention has the same problem related to boring since the wire device must be fixed to the lower fixing point of the boring ball and is sensitive to temperature due to the use of wire and is not suitable for settlement measurement of a foundation with a relatively small settlement .

  Therefore, the settlement can be easily measured in the field with low cost, and the settlement for the entire structure load can be measured

It is necessary to develop a ground settlement measuring device capable of measuring the ground settlement.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a user with a ground settlement measuring apparatus capable of measuring a ground settlement amount due to a total load of a structure.

Specifically, it is an object of the present invention to provide a ground settlement measuring apparatus which is very low in total installation cost compared to an automatic flooring submergence system using a borehole.

It is also an object of the present invention to make a part of the beam settle down in the same manner as the object to be measured by using a mortar and a flexible filler.

In addition, the purpose of the present invention is to prevent errors that may occur in the settlement measurement by using the double-walled pipe.

It is also an object of the present invention to facilitate installation of a ground settlement measuring apparatus using a fixing device.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. It can be understood.

An apparatus for measuring ground settlement for measuring a settlement amount of an object to be measured according to an embodiment of the present invention for realizing the above-described object is a ground settlement measuring apparatus for measuring a settlement amount of an object to be measured. beam; An outer pipe vertically installed on the beam; An inner pipe vertically installed inside the outer pipe; A teltel installed in a vertical direction inside the inner pipe; And a displacement measuring device measuring a vertical displacement of the teletail to determine a settlement amount of the object to be measured, wherein a lower end of the inner pipe and the teltel are fixed to an upper surface of the beam, As shown in Fig.

In addition, a sliding bearing installed between the outer pipe and the inner pipe may be further included.

The beam may further comprise a flexible filler which is composed of a first region that is in contact with the lower surface of the object to be measured and a second region that is not in contact with the lower surface of the object to be measured and that supports at least a part of the second region have.

The apparatus may further include a fixing device for holding the outer pipe in a vertical direction.

Further, the inner pipe may be fixed to the upper surface of the beam by welding or bolt connection.

In addition, a measurement target is formed on the teletail, and the displacement measuring device can measure the vertical displacement based on the measurement target.

According to another aspect of the present invention, there is provided a ground settlement measuring method for measuring a settlement amount of an object to be measured, the method comprising: a first step of horizontally installing a beam on a ground on which the object to be measured is placed; A second step of vertically installing a double pipe on the beam; A third step of inserting a teletail in a vertical direction inside the double pipe to fix the teletail on the upper surface of the beam; A fourth step of measuring a height of a predetermined point of the teletail; A fifth step of constructing a measurement object on the beam; And a sixth step of remeasuring the height of the predetermined point of the teltel to determine the settlement amount of the measured object, wherein the double pipe includes an outer pipe and an inner pipe positioned inside the outer pipe, In the second step, only the inner pipe among the double pipes is fixed to the upper surface of the beam, so that the inner pipe can be slidable with respect to the outer pipe.

The double pipe may further include a sliding bearing installed between the outer pipe and the inner pipe.

The first step may also include providing a flexible filler material that supports at least a portion of the lower surface of the beam to horizontally orient the beam.

The second step may include providing a fixing device for holding the double pipe in the vertical direction.

Further, in the second step, the inner pipe may be fixed to the upper surface of the beam by welding or bolting.

In addition, a measurement target may be formed on the teletail, and the predetermined point may be the measurement target.

In the first step, a part of the lower part of the area on which the measured object is to be installed on the beam may be fixed using a mortar.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a ground settlement measuring apparatus capable of measuring a ground settlement amount due to a total load of a structure.

Specifically, it is possible to provide a ground settlement measuring apparatus which is much lower in total installation cost than an automatic flooring submergence system using a borehole.

In addition, a part of the beam can be dipped in the same manner as the object to be measured using the mortar and the flexible filler.

In addition, it is possible to prevent errors that may occur in the settlement measurement by the backfill using a dual structure pipe.

In addition, it is possible to facilitate the installation of the ground settlement measuring apparatus by using the fixing apparatus.

It should be understood, however, that the effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those skilled in the art to which the present invention belongs It will be possible.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate a preferred embodiment of the invention and, together with the description, serve to provide a further understanding of the technical idea of the invention, It should not be construed as limited.
1 is a sectional view of a ground installed with an apparatus for measuring ground subsidence according to an embodiment of the present invention.
FIG. 2A is a cross-sectional view illustrating an inner region of a beam according to an exemplary embodiment of the present invention, and FIG. 2B is a cross-sectional view illustrating an outer region of a beam according to an exemplary embodiment of the present invention.
Figure 3 illustrates the outer region of the beam in accordance with one embodiment of the present invention.
FIG. 4 is a cross-sectional view illustrating a dual pipe and a teletail provided on an upper surface of a beam according to an embodiment of the present invention; FIG.
FIG. 5 shows a fixing device installed on an outer pipe according to an embodiment of the present invention.
FIG. 6 is a flowchart showing a method of measuring ground settlement according to an embodiment of the present invention.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. In addition, the embodiment described below does not unduly limit the contents of the present invention described in the claims, and the entire configuration described in this embodiment is not necessarily essential as the solution means of the present invention.

1 is a sectional view of a ground installed with an apparatus for measuring ground subsidence according to an embodiment of the present invention.

Referring to FIG. 1, the apparatus for measuring ground subsidence includes a beam 100, a flexible filler material 200, a double pipe 300, a sliding bearing 330, a teletail 400, a displacement measuring device 500, ), And the like.

However, the components shown in FIG. 1 are not essential, and a ground settlement measuring apparatus having components having more components or fewer components may be implemented.

First, the beam 100 is arranged horizontally on the lower surface of the object to be measured. Since the object 100 is located on the lower surface of the object to be measured, the object 100 sinks together with the object to be measured.

H beam or the like can be used as the beam 100 of the present invention and a double pipe 300 to be described later is installed on the upper surface of the beam 100, And the remaining part (outer region) 120 is located on the lower surface of the object to be measured, and is installed so as to protrude to the outer periphery of the object to be measured.

FIG. 2A is a cross-sectional view illustrating an internal region of a beam according to an embodiment of the present invention. FIG.

As shown in FIG. 2, a lower portion of the beam 100 is fixed by mortar, and an upper portion of the beam 100 is buried in the bottomed concrete of the object to be measured (e.g., a foundation plate).

This is to ensure that the beam 100 is more firmly fixed to the object to be measured so that the beam 100 is also caused to sink along with the settlement of the object to be measured.

Since the inner region 110 of the beam 100 is fixed by the mortar and the bottomed concrete of the object to be measured as described above but the outer region 120 is located on the outer periphery of the object to be measured, The beam 100 may be inclined and an error may occur in the settlement amount measurement.

FIG. 2B is a cross-sectional view illustrating an outer region of the beam according to an exemplary embodiment of the present invention.

A double pipe may be provided on the outer region 120 of the beam positioned below the outer region of the object to be measured, and a flexible filler material to be described later may be installed on the lower portion.

Also, the peripheral region of the beam outer region 120 may be filled with backfill, unlike the inner region 110, which is fixed with mortar and bottom shrinkage concrete.

FIG. 3 is a diagram illustrating an external region of a beam according to an embodiment of the present invention. In FIG. 3, the apparatus for measuring ground subsidence according to the present invention includes an outer region of the beam 100 And a flexible filler (200) for supporting the lower surface of the flexible filler (200).

The double pipe 300 may include an outer pipe 320, an inner pipe 310, and a sliding bearing 330, which are vertically installed on the upper portion of the beam 100, (400) may be installed inside the inner pipe (310).

FIG. 4 is a cross-sectional view illustrating a dual pipe and a teletail provided on an upper surface of a beam according to an embodiment of the present invention; FIG.

First, the outer pipe 320 is vertically installed on the upper portion of the beam 100 and protects the inner pipe 310 and the teletail 400.

The inner pipe 310 is vertically installed in the outer pipe 320 and is fixed to the upper surface of the beam 100 without being fixed to the outer pipe 320, Lt; / RTI >

The reason why the inner pipe 310 is fixed to the beam 100 without being fixed to the outer pipe 320 will be described.

After the double pipe 300 is installed, the peripheral portion of the double pipe 300 is filled with the backfill. The settlement caused by the measured object occurs not only before and after the backfill is buried. If the outer pipe 320 and the inner pipe 310 are formed integrally with each other, the depression of the duplex pipe 300 is interfered with by the grounding force and the frictional force between the backfill contacting the outer surface of the pipe.

There is also a risk that the upper surface of the beam 100 and the connection portion of the pipe are broken and separated by the frictional force with the backfill.

Accordingly, the present invention uses a dual structure pipe including an inner pipe 310 slidable with respect to the outer pipe 320, so that even though the outer pipe 320 is held in contact with the backfill, the inner pipe 310 And can be settled together with the beam 100.

The inner pipe 310 is preferably fixed to the upper surface of the beam 100 by bolting or welding.

A sliding bearing 330 may be further provided between the inner pipe 310 and the outer pipe 320 to smooth the sliding movement of the inner pipe 310.

Even if the inner pipe 310 is not fixed to the outer pipe 320, when the inner pipe 310 is in contact with the outer pipe 320, frictional force may be generated between the inner pipe 310 and the outer pipe 320. This reduces the frictional force and smoothly pulls the inner pipe 310.

Next, the teletail 400 is arranged in the vertical direction inside the inner pipe 310, and is a measurement target of the displacement measuring instrument 500, which will be described later.

The teletail 400 can be fixed to the upper surface of the beam 100 because the beam 100 has to descend as much as the subsidence of the beam 100. The teletail 400 includes a measurement target 410 to provide a reference point to be measured by the displacement measuring apparatus 500 can do.

Since the displacement measuring instrument 500 measures the displacement of the teletail 400 on the ground, it is preferable that the teletail 400 has a length such that the upper end thereof can rise to the ground.

Next, the displacement measuring instrument 500 measures the vertical displacement of the teletail 400 to determine the settlement amount of the object to be measured.

As the displacement measuring instrument 500, a light wave distance measuring instrument 500 or the like can be used. The settlement amount of the object to be measured can be obtained on the basis of the measurement target 410 of the teletail 400 described above.

Next, the fixing device 600 is configured to hold the outer pipe 320 in the vertical direction.

That is, the fixing device 600 is for securing the verticalness of the outer pipe 320 when the ground settlement measuring device is installed. The length of the outer pipe 320 is not limited, but the length of the outer pipe 320 is correspondingly long because the measured object such as the base plate is installed deep in the ground.

The outer pipe 320 is not fixed on the upper surface of the beam 100, and even if it is temporarily fixed, it is very difficult to maintain the verticality until the buried soil is filled. For this reason, the fixing device 600 is required.

FIG. 5 shows a fixing device installed on an outer pipe according to an embodiment of the present invention.

5, the fixing device 600 may include a hook 610 and a fixing portion 620. The hook 610 may be a hook for hooking the external pipe 320, It is a part fixed to the hypothetical structure such as the retaining structure.

The plurality of fixing devices 600 may be installed at predetermined intervals and may be removed in the backfilling step after the measurement of the measured object and the ground settlement measuring device. This is because the outer pipe 320 can be fixed by the gravel if the backfill is filled.

Hereinafter, a method of measuring the ground settlement will be described in detail with reference to FIG.

FIG. 6 is a flowchart showing a method of measuring ground settlement according to an embodiment of the present invention.

First, the beam is installed in the horizontal direction on the ground where the measured object is placed (S100).

And a beam is installed on the ground where the object to be measured is placed so that the beam sinks together with the settlement of the object to be measured.

As described above, it is preferable that the beam is installed such that a part of the beam (the inner area) is located in the area where the measured object is placed and the remaining part (the outer area) is located in the outer area of the area in which the measured object is placed.

When installing the beam, a part of the lower part of the inner area can be fixed using mortar, and a part of the upper part can be fixed so as to be embedded in the bottom bulk concrete of the object to be measured.

Further, a flexible filler may be provided on the lower surface of the outer region located at the outer periphery of the area where the object is to be placed, and the inclination of the beam by the object to be measured can be prevented.

Next, a double pipe is vertically installed on the upper portion of the beam (S200).

A step of installing a double pipe including an outer pipe and an inner pipe, wherein the outer pipe is not fixed to the upper surface of the beam as described above, and the inner pipe is fixed to the upper surface of the beam.

When the inner pipe is fixed to the upper surface of the beam, it can be fixed by bolting or welding.

Meanwhile, before performing the step S200, the plurality of fixing devices described above may be installed on the wall of the construction site such as the retaining structure so that the double pipe can be maintained in the vertical direction, and then the double pipe is mounted on the hook of the fixing device Can be installed.

Next, a teletail is inserted in the vertical direction inside the double pipe and fixed to the upper surface of the beam (S300).

The teletails are inserted into the inner pipe, fixed on the upper surface of the beam, and sink together as the beam sinks.

Next, the height of the predetermined point of the teltel is measured (S400).

The height of the telethe can be measured using a displacement meter, and the height can be measured based on the measurement target formed on the teletail as described above. That is, the initial value of the height of the teletail before the ground settlement is measured.

Next, an object to be measured is placed on the beam (S500).

Next, the height of the predetermined point of the teltel is re-measured to determine the settlement amount of the object to be measured (S600).

The height of the point where the height of the teletail is measured in step S400 is measured using a displacement measuring instrument and the difference between the height measured in step S400 and the height measured in step S600 is the base settlement amount of the object to be measured.

It is to be understood that the above-described ground subsidence measuring apparatus and measuring method are not limited to the configuration and method of the above-described embodiments, but the embodiments may be modified so that all or some of the embodiments are selectively As shown in FIG.

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 a ground settlement measuring apparatus capable of measuring ground settlement due to a foundation load of a structure.

Specifically, it is possible to provide a ground settlement measuring apparatus which is much lower in total installation cost than an automatic flooring submergence system using a borehole.

In addition, a part of the beam can be dipped in the same manner as the object to be measured using the mortar and the flexible filler.

In addition, it is possible to prevent errors that may occur in the settlement measurement by the backfill using a dual structure pipe.

In addition, it is possible to facilitate the installation of the ground settlement measuring apparatus by using the fixing apparatus.

100: beam
110: inner area of the beam
120: outer region of the beam
200: Flexible filler
300: double pipe
310: internal pipe
320: outer pipe
330: Sliding bearing
400: Telltale
410: Measurement target
500: Displacement measuring instrument
600: Fixing device
610:
620:

Claims (13)

1. A ground settlement measuring device for measuring a settlement amount of an object to be measured,
A beam horizontally installed on a lower surface of the object to be measured;
An outer pipe vertically installed on the beam;
An inner pipe vertically installed inside the outer pipe;
A teltel installed in a vertical direction inside the inner pipe; And
And a displacement measuring device for measuring a vertical displacement of the teletail to determine a settlement amount of the measured object,
The lower end of the inner pipe and the teletail is fixed to the upper surface of the beam,
Wherein the inner pipe is slidable relative to the outer pipe.
Wherein the beam comprises a first region in contact with a lower surface of the object to be measured and a second region in contact with a lower surface of the object to be measured,
And a flexible filler that supports at least a part of the lower surface of the second region. The method according to claim 1,
And a sliding bearing installed between the outer pipe and the inner pipe. delete The method according to claim 1,
And a fixing device for holding the external pipe in a vertical direction. The method according to claim 1,
Wherein the inner pipe is welded or bolted to the upper surface of the beam. The method according to claim 1,
A measurement target is formed on the teletail,
Wherein the displacement measuring unit measures the vertical displacement based on the measurement target. A ground settlement measuring method for measuring a settlement amount of an object to be measured,
A first step of horizontally installing a beam on the ground on which the measured object is placed;
A second step of vertically installing a double pipe on the beam;
A third step of inserting a teletail in a vertical direction inside the double pipe to fix the teletail on the upper surface of the beam;
A fourth step of measuring a height of a predetermined point of the teletail;
A fifth step of constructing a measurement object on the beam; And
And a sixth step of remeasuring the height of the predetermined point of the teltel to determine the settlement amount of the measured object,
Wherein the double pipe comprises an outer pipe and an inner pipe located inside the outer pipe,
In the second step,
Only the inner pipe of the double pipe is fixed to the upper surface of the beam, the inner pipe is slidable with respect to the outer pipe,
In the first step,
And installing a flexible filler to support at least a portion of the lower surface of the beam to horizontally orient the beam. 8. The method of claim 7,
The double-
And a sliding bearing installed between the outer pipe and the inner pipe. delete 8. The method of claim 7,
The second step comprises:
And a fixing device for holding the double pipe in a vertical direction. 8. The method of claim 7,
In the second step,
Wherein the inner pipe is fixed to the upper surface of the beam by welding or bolting. 8. The method of claim 7,
A measurement target is formed on the teletail,
Wherein the predetermined point is the measurement target. 8. The method of claim 7,
In the first step,
Wherein a part of the lower part of the area on which the measured object is to be installed on the beam is fixed using a mortar.
KR1020150151867A 2015-10-30 2015-10-30 Apparatus and method for measurement of ground settlement KR101729415B1 (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100603140B1 (en) 2006-01-19 2006-07-20 지에스건설 주식회사 The structure construction method of having used geogrid reinforced stone column and this

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100603140B1 (en) 2006-01-19 2006-07-20 지에스건설 주식회사 The structure construction method of having used geogrid reinforced stone column and this

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