KR20160141348A - sinking-measuring method - Google Patents
sinking-measuring method Download PDFInfo
- Publication number
- KR20160141348A KR20160141348A KR1020150096208A KR20150096208A KR20160141348A KR 20160141348 A KR20160141348 A KR 20160141348A KR 1020150096208 A KR1020150096208 A KR 1020150096208A KR 20150096208 A KR20150096208 A KR 20150096208A KR 20160141348 A KR20160141348 A KR 20160141348A
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- South Korea
- Prior art keywords
- ground
- inner tube
- cavity
- pipe
- settlement
- Prior art date
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- 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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
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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
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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
The present invention relates to a settlement measuring method using an indicator subsidence system, wherein the subsidence subsystem is provided with a measurement point on the surface of the earth and periodically performs surveying to determine the settlement amount of the subsidence due to tunnel excavation or embankment And to prevent the risk factors that may be affected by the subsidence of the surface.
Description
The present invention relates to a method of measuring settlement amount using an indicator subsidence system. In general, the ground penetration system is installed for the purpose of grasping the stability of the surrounding structures due to ground settlement by measuring the ground displacement due to tunnel excavation and embankment with regular measurement by installing a survey point on the surface.
Soft ground refers to a ground in which the upper structure can not be supported, for example, soft clay, loose sand, and organic soil.
When an airport, a port, a road, a bridge, a building, etc. are built on a ground composed of a weak clayey soil or an organic soil soil, the settlement amount of the ground is excessively increased.
Generally, in case of soft ground, sudden ground settlement may occur due to vibration such as earthquake, explosion, flood, rainy season, and so on. Therefore, in order to construct the grounds such as highways, airports, ports, industrial complexes and new towns, it is necessary to fill up the soil on the soft ground and to work on the civil engineering works.
However, even if the embankment is constructed, heavy equipment such as heavy equipment may continue to move over the embankment, or soft ground may sink gradually due to excessive earthquakes and floods.
Therefore, it is necessary to always measure the subsidence of the soft ground progressively by measurement to prevent a major accident in advance.
Various types of apparatuses for measuring the ground subsidence of the above-mentioned ground have been developed and used.
In the case of surface indwelling system, which is frequently used, it is necessary to set up a point on the surface of the earth to measure the amount of ground displacement due to tunnel excavation and embankment by periodic surveying and to establish stability of the surrounding structure due to surface settlement. . Since such a ground sinking system has a single pipe, there is a problem that when a rigid continuum such as asphalt is installed on a rigid continuum, a cavity is formed due to a difference in rigidity, an accurate settlement amount can not be measured, And so on. In addition, it is difficult to foresee the collapse of tunnels and excavated parts, thus posing a risk of large safety accidents.
In order to solve the aforementioned risk factors, a method of measuring the settlement amount using the dual pipe surface sinking system is provided in Patent No. 1235746 (Feb. In the example of Figs. 1 and 2, the method of measuring the settlement amount using the dual pipe surface sedimentation system,
The dual tube surface sinking system is largely composed of a
Here, the
In addition, a lateral needle can be placed on the head of the inner pipe (20), and the absolute settlement amount of the measurement position can be grasped by a surveying technique. In the example of the drawing, A portion is a side needle, B is a leveling portion, and C is a reference point free from settlement influence.
In addition, the relative displacement between the
(S1: initial position of inner tube head (part A), S2: settling position of inner tube head part (B part))
The method of measuring the settlement using the dual pipe surface sinking system is as follows. First, the outer surface is inserted and fixed to the pavement after perforating the ground before tunnel excavation. After removing the plug, separate the inner tube from the outer surface. Subsequently, the inner pipe behaves according to the subsidence of the ground, and the absolute settlement of the measurement position is determined by the measurement technique, and the cavity size is determined by the relative displacement between the inner pipe and the outer appearance. That is, when the deformation of the ground occurs after tunnel excavation, the inner pipe according to the present invention agrees with the behavior of the ground, so that the settlement of the ground can be accurately measured.
Herein, in the step of measuring the absolute settlement amount of the measurement position by the measurement technique, the inner pipe behaves according to the settlement of the ground, the step of measuring the absolute settlement amount of the measurement position by a surveying method is established.
According to this method, it is described that there is an action effect that the settlement of the head of the inner pipe exactly coincides with the actual settlement because it is caused by the settlement of the ground without being affected by the rigidity of the road pavement.
However, the method of measuring the settlement amount using the double pipe surface sedimentation system eliminates some problems of the conventional surface sedimentation systems,
The relative displacement between the inner tube and the outer tube measures the cavity size. The depth of the ground where the lower end of the inner tube touches can be measured, but it can not accurately reflect the total volume of the generated cavity.
In addition, since the contact surface between the outer and inner pipes is wide, the inner pipe is likely to be fixed to the inner diameter of the outer pipe due to the infiltration of foreign matter or freezing in winter, so that the inner pipe can not be effectively lowered Therefore, it is difficult to measure the subsidence of the ground easily.
SUMMARY OF THE INVENTION The present invention seeks to provide a measurement method or means capable of resolving the above-described problems and measuring an accurate settlement amount.
In order to solve the above-described problems, the method of measuring settlement amount using the landing pad system according to the present invention includes:
Punching the papers vertically to the ground;
Burying an outer tube having a pipe shape having an upper and a lower length in a side wall thereof and having a display portion for indicating a height of the filling member;
Filling the outer tube with a filling member up to a height of the display unit;
Inserting an inner tube at the top of the outer tube;
And when a cavity is generated by the settling of the ground,
Filling the cavity with the filling member;
Lowering the inner tube according to the volume of the cavity;
Measuring a change in height of the inner tube;
And the ground settlement amount is obtained through.
According to the settlement amount measuring method using the landing pad system of the present invention,
It is possible to measure the actual volume of the cavity according to the settlement of the ground, so that the size and settlement amount of the entire cavity can be known immediately,
In the inner pipe, since the length of the inner pipe is shorter than that of the conventional double pipe pipe lowering system, it is possible to reduce the contact surface with the inner diameter of the inner pipe and the inner diameter of the outer pipe, ,
Further, since the volume of the filling member filled in the narrow area of the outer tube corresponds to the volume of the large area of the cavity, the falling and the behavior of the inner tube are large, so that the change in the soil settlement can be reflected more sensitively and reliably.
Therefore, it is expected that the rapid discovery of ground subsidence and rapid measures for it can be expected.
BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an exemplary view showing the implementation of an earth subsidence tube according to the prior art. Fig.
Fig. 2 is an exemplary view showing the dual pipe surface sinking and leveling according to the prior art. Fig.
BRIEF DESCRIPTION OF THE DRAWINGS Fig.
FIG. 3A is a perspective view and side sectional view of an external appearance; FIG. 3B is a perspective view and side sectional view of the inner tube;
FIG. 4 is a side cross-sectional view showing a state in which an external appearance is embedded in a skin patch; FIG.
Figure 5A is a side cross-sectional view illustrating an example of filling a filler member; FIG. 5B is a side view showing a state in which the filling member is filled;
Figures 6A and 6B illustrate another embodiment of filling a filler member in side view;
FIG. 7A is an exemplary view showing a process of inserting an inner tube with a side cross section; FIG. 7B is a side view showing a state in which the inner tube is inserted into the outer tube;
FIG. 8A is a state diagram showing the ground subsidence state of the surface as a side sectional view; FIG. B is a state in which the cavity is formed by the subsidence;
FIG. 9A is an exemplary view showing a state in which the filling member is lowered to fill the cavity as a side sectional view; FIG. 9B is a view showing a mathematical formula for determining the volume of the cavity and a state in which the inner tube is lowered as a side sectional view;
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings.
FIG. 3A is a side view of the
The
The
Preferably, the outer diameter of the
At the time of construction, a vertical hole corresponding to the outer diameter of the
Next, as shown in FIG. 5A, the filling
The filling
If it is difficult to accurately align the filling
When the filling
The examples of Figs. 8 to 9 are provided to illustrate the operation in the field of the present invention.
First, when the ground (gr) sinks from an initial state as shown in FIG. 8A to form a cavity ca as shown in FIG. 8B, the filling
Eventually, as in the example of FIG. 9B, the
Since the cavity ca is formed in an area much larger than the sectional area of the lower end of the
Vca =? * (D / 2) 2 *? H
(Vca = cavity volume;? = Circumferential ratio; d = apparent diameter;? H =
That is, the volume of the cylinder, in which the
The change in the inner pipe height may be determined by directly checking the position of the
An
A filling member (300);
Claims (1)
Burying an outer tube having a pipe shape having an upper and a lower length in a side wall thereof and having a display portion for indicating a height of the filling member;
Filling the filling member up to the height of the display unit inside the outer tube;
Inserting an inner tube at the top of the outer tube;
Respectively,
When a cavity occurs due to subsidence of the ground,
Filling the cavity with the filling member;
Lowering the inner tube according to the volume of the cavity;
Measuring a change in height of the inner tube;
And the ground settlement amount is obtained through the ground settlement measuring method.
Priority Applications (1)
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KR1020150096208A KR101769352B1 (en) | 2015-07-06 | 2015-07-06 | sinking-measuring method |
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KR1020150096208A KR101769352B1 (en) | 2015-07-06 | 2015-07-06 | sinking-measuring method |
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KR101769352B1 KR101769352B1 (en) | 2017-08-18 |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20180057452A (en) * | 2016-11-22 | 2018-05-30 | 오지윤 | sinking-measuring method |
KR20190017864A (en) * | 2019-02-14 | 2019-02-20 | 오지윤 | Earthquake measuring method |
KR20190018462A (en) * | 2016-11-22 | 2019-02-22 | 오지윤 | Earthquake measuring method |
CN116124083A (en) * | 2023-04-12 | 2023-05-16 | 中铁二十三局集团有限公司 | High-fill roadbed settlement observation device and observation method |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101479651B1 (en) | 2014-10-24 | 2015-01-13 | (주)테스콤엔지니어링 | An earth surface subsidence board of soft ground and water level meter |
-
2015
- 2015-07-06 KR KR1020150096208A patent/KR101769352B1/en active IP Right Grant
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20180057452A (en) * | 2016-11-22 | 2018-05-30 | 오지윤 | sinking-measuring method |
KR20190018462A (en) * | 2016-11-22 | 2019-02-22 | 오지윤 | Earthquake measuring method |
KR20190017864A (en) * | 2019-02-14 | 2019-02-20 | 오지윤 | Earthquake measuring method |
CN116124083A (en) * | 2023-04-12 | 2023-05-16 | 中铁二十三局集团有限公司 | High-fill roadbed settlement observation device and observation method |
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KR101769352B1 (en) | 2017-08-18 |
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