KR101514264B1 - Method for measuring the ground sinks using gravity sensor - Google Patents

Abstract

The present invention relates to a method of measuring ground settlement using a gravity sensor, which comprises a plurality of gravity sensors disposed on the ground, a communication module for transmitting data of the gravity sensor, In the ground settlement measuring system including the monitoring server for simulating the state of the ground, a method for measuring the settlement of the ground using the slope value of the gravity sensor, according to the present invention, A gravity sensor disposing step of disposing the gravity sensor; An identification number assigning step of assigning a unique identification number to each of the gravity sensors so as to distinguish the gravity sensors from each other and to grasp respective positions and distances between the gravity sensors; A ground mapping step of mapping the ground area on which the gravity sensors are disposed based on the identification number to display the ground area as an image; A reference value designation step of measuring the initial slope values of the gravity sensors according to the unique identification number and then designating the initial slope value as a reference value and transmitting the same to the monitoring server; Measuring a slope value of the gravity sensors by time or date and transmitting and storing the slope values to the monitoring server; And a subsidence determination step of comparing the slope value measured in the slope measurement step with the reference value to determine whether the subsidence is subsided.

Description

METHOD FOR MEASURING THE GROUND SINK USING GRAVITY SENSOR [0002]

The present invention relates to a method of measuring a ground settlement using a gravity sensor, and more particularly, to a method of measuring a ground settlement using a gravity sensor provided to accurately and easily measure a deformation state of the ground.

In general, the ground can be deformed by various factors such as subsidence or elevation, and such deformation will be very large in such places as clay ground or soft ground.

There are many difficulties in designing and constructing the structure including the civil works in the place of the subsidence. For example, when tunnel construction, trench construction or road construction is carried out, due to the load and vibration of the machine used in the work, settlement and ridge phenomenon occurs in the work site as well as the surrounding ground, Cracks may occur, and serious damage such as displacement of the water pipe or gas pipe may occur.

Therefore, by measuring the deformation state of the surrounding ground under construction, it is possible to prevent the indirect damage from occurring, or to maintain the stability of the structure by measuring the deformation state of the ground continuously even if it is already dried A method of measuring the deformation of the ground is used.

As a representative example of measuring the subsidence of the ground, a method using a level measurement and a method using an indicator subsidence system are known.

The method of measuring the ground settlement using the leveling method is a method of measuring the level of a load supported on a settlement plate at a position to be measured on the basis of a floating point that is not affected by excavation near the site, .

The method of measuring the ground settlement using the ground settlement system measures the ground settlement by measuring the difference between the floating layer and the ground surface after the pipe is pierced to the floating layer (bedrock) at the point to be measured.

However, among the above-mentioned conventional methods, the method using the level measurement requires a long time for measurement because the load must be continuously moved along the measurement point along with a disadvantage that the degree of error is large, On the road there is a problem that is very dangerous to work with.

In addition, since the method using the ground subsidence system requires buried pipes to the passive layer, it requires a large installation cost and makes it difficult to measure relative positions between the points.

KR 10-0836644 B1 KR 10-0986703 B1

SUMMARY OF THE INVENTION It is an object of the present invention to solve the problems derived from the prior art, and to provide a ground settlement measuring method using a gravity sensor that can accurately and easily measure a deformation state of a ground.

Another object of the present invention is to provide a ground settlement measuring method using a gravity sensor that enables easy installation at low cost without construction of a ground excavation or the like.

According to an embodiment of the present invention, there is provided a gravity sensor comprising: a plurality of gravity sensors disposed on an indicator; a communication module for transmitting data of the gravity sensor; A method of measuring settlement of a ground using a slope value of a gravity sensor in a ground settlement measuring system including a monitoring server for simulating a state of a ground based on a gravity sensor arrangement ; An identification number assigning step of assigning a unique identification number to each of the gravity sensors so as to distinguish the gravity sensors from each other and to grasp respective positions and distances between the gravity sensors; A ground mapping step of mapping the ground area on which the gravity sensors are disposed based on the identification number to display the ground area as an image; A reference value designation step of measuring the initial slope values of the gravity sensors according to the unique identification number and then designating the initial slope value as a reference value and transmitting the same to the monitoring server; Measuring a slope value of the gravity sensors by time or date and transmitting and storing the slope values to the monitoring server; And a subsidence determination step of determining a subsidence condition by comparing the slope value measured in the slope measurement step with the reference value.

에 의해 지반 변동량(h)을 계산할 수 있다. (여기서, d1은 기울기 변화가 발생한 중력센서와 인접한 다른 중력센서와의 거리이고, θ_s1은 초기 기울기 값이고, θ_s2는 기울기 변화가 발생한 중력센서의 기울기 값이다.)Here, the sinkage determination step compares the slope value of the gravity sensor in which the slope change has occurred with the slope value of another adjacent gravity sensor,

The ground change amount h can be calculated. (Where d1 is the distance from the gravity sensor where the slope change occurs to another gravity sensor adjacent to it, θ _s1 is the initial slope value, and θ _s2 is the slope value of the gravity sensor where the slope change occurs)

The contour line forming step may further include a contour line forming step of forming contour lines in the image of the ground area according to the ground change amount calculated by the above equation.

Meanwhile, a simulation is performed to dynamically model a variation of the ground area displayed as an image using the data calculated in the settlement determination step, and to apply a predetermined algorithm to the modeling data to predict future variations of the ground area The simulation step may be further performed.

In addition, after the reference value designation step, when the relocation and the slope value of the gravity sensor are changed due to an external action other than the subsidence, the data stored in the reference value designation step is initialized and the current slope values of the gravity sensors And resetting the reference value to a reference value.

According to the method of measuring the ground settlement using the gravity sensor of the present invention as described above, since the settlement degree of the ground can be easily and quickly measured based on the installation point of the gravity sensor, So that it is possible to quickly cope with the problem.

In addition, since the sensor is disposed on the surface of the ground without inconveniences such as excavation work, it is possible to easily install at low cost, and it is easy to maintain and repair.

FIG. 1 is a flowchart for explaining a ground settlement measurement method using a gravity sensor according to an embodiment of the present invention,
FIG. 2 is an exemplary view for explaining a gravity sensor according to an embodiment of the present invention,
FIG. 3 and FIG. 4 are conceptual diagrams for explaining a ground settlement measuring method using a gravity sensor according to an embodiment of the present invention,
5 is a conceptual diagram for deriving a ground settlement amount calculation formula according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Brief Description of Drawings FIG. 1 is a block diagram of a computer system according to an embodiment of the present invention; FIG. 2 is a block diagram of a computer system according to an embodiment of the present invention; FIG.

The present invention relates to a gravity sensor, comprising: a plurality of gravity sensors disposed on an index; a communication module for transmitting data of the gravity sensor; and a control unit for receiving and computing data of the gravity sensor from the communication module, The present invention is applicable to a ground subsidence measurement system including a monitoring server, and the subsidence of the ground can be measured using the slope value of the gravity sensor.

As shown in FIG. 1, the method of measuring the ground settlement using the gravity sensor according to the present invention includes: a gravity sensor placement step (S100) of arranging the gravity sensors in a lattice form on the land surface; (S200) for assigning a unique identification number to each of the gravity sensors so as to grasp the distances between the gravity sensors, and mapping the ground regions on which the gravity sensors are arranged based on the identification numbers, (S300) for displaying the ground area as an image; a reference value designation step (S300) for designating a reference value as an initial slope value of each gravity sensor according to the unique identification number, (S400), measuring slope values of the gravity sensors by time or by date, and transmitting and storing slope values of the gravity sensors to the monitoring server (S500), and a subsidence determination step (S600) of comparing the slope value measured in the slope measurement step (S500) with the reference value to determine whether the subsidence is subsided.

The gravity sensor 10 used in the gravity sensor arrangement step S100 is a sensor capable of measuring a value of the inclination? With respect to the center of the earth as shown in FIG. Here, the gravity sensor 10 may be protected by a housing including a case and a cover, not shown. The gravity sensor 10 has a large contact area with the ground surface It is advantageous. Therefore, it is preferable that the gravity sensor 10 has a flat plate shape. For this purpose, the housing has a relatively wide sloped upper and lower surfaces. Meanwhile, a communication module is mounted in the case, and is electrically coupled to the gravity sensor 10, and transmits the tilt value of the gravity sensor 10, that is, data to the monitoring server. At this time, the distance between the gravity sensors 10 and the gravity sensors adjacent to each other can be grasped by the local communication method, and the slope data of the gravity sensor 10 can be transmitted to the monitoring server through the mobile communication network .

In the ground mapping step S300, neighboring gravity sensors are connected by lines to display the ground state as a two-dimensional or three-dimensional image. These images can be output to a manager computer or the like, and the ground conditions can be visually confirmed through a virtual image.

The reference value designated in the reference value designation step (S400) is not permanently set once, and the reference value already designated may be initialized and redesigned according to the situation. That is, when the relocation and the tilt value of the gravity sensor are changed due to the external action other than the subsidence, the data stored in the reference value designation step (S400) is initialized and the current tilt value of the gravity sensors is set as a reference value Can be specified.

In the tilt measuring step (S500), the slope values of the gravity sensors measured and stored for each hour or date are recorded in a database included in the monitoring server, so that the change of the ground can be confirmed later. .

The settlement determining step S600 can determine the ground settlement amount according to the gradient change of the gravity sensor, referring to FIG. 3 and FIG. 4, and derive the ground settlement amount calculating formula with reference to FIG. That is, the slope value of the gravity sensor S1 in which the slope change occurs is compared with the slope value of another adjacent gravity sensor S2, and the ground slope amount h is calculated using the following equation (1).

Here, d1 is the distance between the gravity sensor in which the gradient change occurs and another adjacent gravity sensor,? _S1 is the initial slope value, and? _S2 is the slope value of the gravity sensor in which the slope change occurs.

FIG. 3 shows a layout of the gravity sensor arrangement before the ground change occurs in the state where the initial reference value is set, and FIG. 4 shows the layout of the gravity sensor arrangement after the ground change has occurred. In other words, if neighboring gravity sensors are tilted in opposite directions, it can be seen that the ground between the gravity sensors is depressed. If neighboring gravity sensors are inclined in the same direction, the ground where the gravity sensors are located tilts in one direction . Therefore, it is possible to easily measure the settlement degree of the ground through the ground change amount h data according to Equation (1).

4, a contour line C is formed in the image of the ground area to easily grasp the subsidence of the ground (S620), according to the ground change value calculated by Equation (1) .

Meanwhile, the visual effect can be enhanced by dynamically modeling the variation of the ground area displayed as an image using the data calculated in the settlement determination step (S600), and a predetermined algorithm is applied to the modeling data, Simulation that predicts future variations can be performed to secure the ground area where settlement is possible (640).

According to the ground settlement measuring method using the gravity sensor of the present invention described above, since the settlement degree of the ground can be easily and quickly measured based on the installation point of the gravity sensor, It is possible to cope with the problem in advance, and it is possible to install the gravity sensor on the surface of the ground without inconveniences such as excavation work, so that it can be installed easily at low cost, and it is easy to maintain and repair.

The foregoing has outlined rather broadly the features and technical advantages of the present invention in order that the claims of the invention to be described below may be better understood. The embodiments described above are susceptible to various modifications and changes within the technical scope of the present invention by those skilled in the art. These various modifications and changes are also within the scope of the technical idea of the present invention and will be included in the claims of the present invention described below.

Claims (5)

A plurality of gravity sensors disposed on the ground, a communication module for transmitting the data of the gravity sensor, and a monitoring server for receiving and calculating data of the gravity sensor from the communication module and simulating the state of the ground based thereon A method for measuring settlement of a ground using a slope value of a gravity sensor in a ground settlement measuring system,
A gravity sensor disposing step of disposing the gravity sensors in a lattice form on an indicator;
An identification number assigning step of assigning a unique identification number to each of the gravity sensors so that the gravity sensors can be distinguished from each other and the respective positions and distances between the gravity sensors can be grasped;
Mapping a ground region in which the gravity sensors are arranged based on the identification number, connecting adjacent gravity sensors with lines, and displaying the ground region as an image;
A reference value designation step of measuring an initial slope value of the gravity sensors according to the unique identification number and designating the initial slope value as a reference value and transmitting and storing the initial slope value to the monitoring server;
Measuring a tilt value of the gravity sensors by time or by date, and transmitting and storing the tilt values of the gravity sensors to the monitoring server; And
The slope of the gravity sensor is calculated by comparing the slope value measured in the slope measuring step with the reference value to determine whether the slope has subsided or not. When the slope value of the gravity sensor is compared with the slope value of the adjacent gravity sensor, step;
And measuring the ground settlement using the gravity sensor. The method according to claim 1,
The sinkage determination step may include:
The slope value of the gravity sensor in which the slope change has occurred is compared with the slope value of another adjacent gravity sensor,

(Where d1 is the distance from the gravity sensor where the slope change occurs to another gravity sensor adjacent to it, θ _s1 is the initial slope value, and θ _s2 is the slope value of the gravity sensor where the slope change occurs)
(H) is calculated by using the gravity sensor. 3. The method of claim 2,
And a contour line forming step of forming a contour line on the image of the ground area according to the ground change amount calculated by the equation. The method according to claim 1,
A dynamic modeling of the variation of the ground area represented by an image by time or date by using the data calculated in the settlement determination step and a predetermined algorithm is applied to the modeling data to predict a future variation of the ground area The method of claim 1, further comprising the step of measuring the ground settlement using the gravity sensor. The method according to claim 1,
After the reference value designation step,
A reference value resetting step of resetting the current tilt value of the gravity sensors to a reference value after initializing the stored data in the reference value designation step when the gravity sensor is relocated and the tilt value is changed due to an external action other than the ground subsidence, And measuring the ground settlement using the gravity sensor.

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