KR100708781B1 - Apparatus for Measuring Displacement of Engineering Structure and Underground Displacement - Google Patents

Abstract

The present invention uses the inclination sensor or the length sensor in civil engineering sites, such as roads, tunnels, bridges, dams, soft grounds, landfills, such as the slope, ground slope and ground subsidence of civil structures The present invention relates to a civil structure and a displacement measurement device using a plurality of measurement sensors capable of monitoring the civil structure and ground behavior.

According to the present invention, a plurality of unit displacement measuring devices are provided, each of which includes a measuring sensor and detects a tilt displacement of the object to be measured, converts the detected tilt signal into a digital signal (A / D), and transmits the measured tilt signal to the measurement system main body via serial communication. And a plurality of connection joints for mutually bending adjacent unit displacement measuring instruments, and a measuring cable connected in parallel to the measuring system main body through a plurality of unit displacement measuring units and a plurality of connecting joints. Characterized in that consists of.

Civil Instruments, Inclination Sensors, Inclinometers, Automatic Measuring Devices, Ground Level Displacement

Description

Apparatus for Measuring Displacement of Engineering Structure and Underground Displacement}

1 is a buried underground installation diagram of a conventional underground horizontal displacement measuring device,

Figure 2 is a sectional view of the installation of the conventional tunnel hole displacement measuring apparatus,

3 is a cross-sectional view showing a civil structure and underground displacement measuring apparatus using a plurality of measuring sensors according to the present invention,

 4 is a cross-sectional view of a connecting joint for interconnecting a plurality of unit displacement measuring instruments according to the present invention;

5 is an installation cross-sectional view showing a state buried in the ground using the displacement measuring device according to the present invention as a horizontal horizontal displacement measuring device,

6 is an installation cross-sectional view showing a state installed in the tunnel ceiling using the displacement measuring device according to the present invention as a tunnel hole displacement measuring device.

 (Explanation of symbols for the main parts of the drawing)

10; 10a underground; Sidewall

16; Horizontal displacement 20; Tunnel inner wall

30; Measuring cables 31a, 31b; Measuring sensor

32a, 32b; Cylindrical casings 33a, 33b; Connection joint

34a, 34b; A signal converter 41; Support shaft

41a, 43a; Through-hole 41b; Hemispherical Expansion

42; Drive section 42a; Housewife

43; Stock station 44,45; Set screw

50; Displacement measuring device 50a-50d; Unit displacement meter

55a-55e; Anchor 60; Measuring system

The present invention relates to a civil structure and underground displacement measuring apparatus, and in particular, the slope of the civil structure, the slope of the ground structure using a slope sensor or a length sensor at a civil site, such as roads, tunnels, bridges, dams, soft ground, landfill The present invention relates to a civil structure and a ground displacement measuring device using a plurality of measuring sensors capable of monitoring the state of civil structures and ground behavior by measuring displacements such as 傾斜) and ground subsidence.

The displacement of civil structures such as roads, tunnels, bridges, dams, and horizontal horizontal displacements such as sidewalls or ground subsidence displacements such as reclaimed landfills and soft grounds during construction of underground cuts for slope cuts, subway construction sites, and construction of high-rise buildings. It is necessary to monitor the behavior by detecting the displacement of the structure or the side wall according to the design standard or the construction method of the construction site.

In general, there are many measuring devices for civil engineering measurement using the inclination sensor, but the external structure of the measuring instrument differs according to the application of the civil construction site, and the inclination sensor having a certain length is assembled by bolts and put into the inclination system. ) Or is attached to a civil structure. In the civil engineering field, the tilt displacement of the inclination sensor is converted to the length unit (mm) to find the tilt of the structure or the settlement of the ground and use it as the stability judgment data of the civil engineering site.

Referring to the installation example for a displacement measuring device of a typical representative civil structure in the civil engineering site as follows.

1 is a cross-sectional view showing a conventional underground horizontal displacement measuring device (Inclinometer System) embedded in the ground.

As shown in FIG. 1, in the related art, a single inclination tube 11 is first embedded in the ground 10 to measure the slope of the ground, and a plurality of inclination sensors 12a and 12b are inserted into the inclination tube 11. The plurality of inclination sensors 12a and 12b are connected to the plurality of sensor connecting bolts 14a and 14b while being pushed into the inclination tube 11 using the plurality of sensor rollers 13a and 13b attached thereto. Inclination sensors 12a and 12b were installed. The inclination pipe 11 is a unit pipe of about 3m interconnected to form a substantially single pipe.

Accordingly, the conventional underground horizontal displacement measuring device detects the underground horizontal displacement 16 by the respective inclination sensors 12a and 12b, and then measures through the plurality of measuring cables 15a and 15b exposed to the outside of the sensor. Collect data to determine underground horizontal displacement.

In addition, when the inclination gauge 11 of FIG. 1 is installed in the ground 10 in the horizontal direction, it becomes a ground subsidence measuring system for measuring the degree of sinking of the ground.

However, the conventional underground horizontal displacement measuring device or ground subsidence measuring system is complicated in structure and very difficult to install. That is, in order to measure the inclination and settlement of the ground (10), a single inclination tube (11) should be used, and the inclination transmitted through the sensor roller (13) in contact with the groove inside the inclination system inclined. Since the sensor 12 detects the displacement of the system, there is a significant error from the actual change.

For example, a structure such as a dam is about 70-100 m long, and in case of ground subsidence monitoring such as a landfill, a longer measuring range is required. Installation work for pushing the plurality of inclination sensors 12a and 12b interconnected by the sensor connecting bolts 14a and 14b into the inclination tube 11 using the plurality of sensor rollers 13a and 13b takes a long time. do.

In addition, since the plurality of inclination sensors 12a and 12b are embedded in the inclination tube 11, it is difficult to independently detect each of the microscopic horizontal displacements generated locally in a part of the structure for each sensor. When the inclination system 11 is inclined due to the displacement, the displacement of the inclination system transmitted to the inclination sensors 12a and 12b through the sensor roller 13 touching the groove inside the inclination system is finally detected. There is a problem of not being sensitive to change. In other words, due to the spring thaw or heavy snow, heavy rain or rainy season, it is not possible to catch the timely response due to the rapid early detection of the slight change in behavior that affects the safety of the structure installed on the side wall of the structure or civil engineering site. do.

In addition, since the conventional underground horizontal displacement measuring device has a structure in which a plurality of measuring cables 15a and 15b connected to each of the plurality of inclination sensors 12a and 12b are exposed to the outside of the plurality of inclination sensors 12a and 12b, the inclination gauge Interposed between the (11) and the sensor roller 13, there is a limit to the number of sensors that can be installed and the installation becomes very difficult as the number of installed sensors increases.

On the other hand, Figure 2 is a cross-sectional view showing a conventional tunnel displacement measurement system (Basset Conversion System).

As shown in FIG. 2, the conventional tunnel hole displacement measuring system fixes the fixing device 21 to the tunnel inner wall 20 using an anchor bolt, and attaches two short sensors 22a and 23a to each other. 25 and the long arm 24 are installed by fixing pins to the fixing device 21, and another pair of inclination sensors 22b, 23b; 22c, 23c in the same manner as a chain form the inner wall of the tunnel ( 20).

The change of each sensor installed as described above is collected by an automatic measuring instrument through a plurality of measuring cables 26a-26f connected to each of the plurality of inclination sensors 22a-22c, 23a-23c, and then signal-processed and measured. Since the length of the displacement is constant, the degree of inclination can be known in terms of inclined length unit (mm). It is also possible to draw the displaced cross section of the tunnel structure which is changed by continuous measurement.

However, the above-described conventional tunnel hole displacement measuring system requires combining each sensor with a fixing device 21 when measuring tunnel hole displacement, and a plurality of measurements coming out of each sensor 22a-22c, 23a-23c. Since the cables 26a to 26f are connected to an automatic measuring instrument, they are not easy to install and have high installation costs.

In addition, this measuring system includes a plurality of measuring cables, which must be installed in a structure in which the components constituting the system are exposed to the outside of the tunnel inner wall, thereby impairing the aesthetics of the tunnel and acting as an obstacle for periodic cleaning of the tunnel inner wall. There is a problem. Therefore, this measuring system was difficult to use before the construction of shockcrete, etc. on the tunnel inner wall, and was available only for permanent measurement used after the tunnel construction was completed.

Moreover, this measurement system can only measure displacement in the exposed state and cannot be installed by the method of embedding in the tunnel inner wall, which does not provide any other solution to the problem.

On the other hand, Korean Patent Laid-Open No. 2000-60556 detects an angle change and a length change by using only one long arm without a bent joint in order to solve the problem of measurement error caused by the play of the bent joint of the tunnel hole displacement measuring system. A two-dimensional tunnel hole measuring sensor device has been proposed.

Tunnel bore measurement device of the Patent Publication No. 2000-60556 affects each sensor when the cylinder shakes, causing a large number of measurement errors, and can not calibrate the error by separating the internal measurement sensor separately and continuing to correct the error. There is.

This Patent Publication No. 2000-60556 also includes a plurality of measuring cables, which must be installed in a structure in which the components constituting the system are exposed to the outside of the tunnel inner wall, thus damaging the aesthetics of the tunnel, and placing a shockcrete on the tunnel inner wall. Before construction, there was a problem that it was difficult to use and was only available for permanent measurement used after the tunnel construction was completed.

In addition, in Utility Model Registration No. 28387, the present inventors separately detached the internal measurement sensor in Published Patent No. 2000-60556, and cannot be calibrated. A device for automatically measuring displacements with a detachable structure has been proposed.

However, similar to the above, the automatic displacement measurement device can be used only for permanent measurement used after the tunnel construction is completed because the measurement cables and components connected to each sensor are exposed to the outside. There was a problem that it was difficult to use before construction.

The present invention has been made to solve the problems of the conventional measuring device as described above, the object of which is to interconnect a plurality of unit displacement measuring instruments each including a measuring sensor using a joint joint that can be bent at the same time By connecting the sensors in parallel to a single measuring cable or by embedding multiple measuring cables connected to each measuring sensor in the joint and casing, the civil structure and underground displacement can be bent for each unit displacement meter without exposing the measuring cable to the outside. To provide a measuring device.

Another object of the present invention is to be able to bend for each unit displacement measuring device without exposing the measurement cable to the outside, any installation site, such as various civil structures of the measurement sensor, side walls of underground civil construction site, ground subsidence, or measuring sensor It is to provide a civil structure and underground displacement measuring device that can be installed easily regardless of whether it is exposed or buried.

Still another object of the present invention is to bend each unit displacement measuring device so that a plurality of measuring sensors behave like the object to be measured, and by measuring the local minute displacement of the measured object directly by each sensing unit displacement measuring method It is to provide a civil structure and underground displacement measuring apparatus that can reduce the measurement error and increase the reliability of the measurement.

Provides a civil structure and underground displacement measuring device capable of active response by capturing the minute displacement of the measured object quickly in the early stage by measuring the local minute displacement in each unit displacement measuring device of the present invention in a direct sensing method There is.

Another object of the present invention does not require a conventional inclinometer, a sensor roller, a fixing device for connecting the sensor, and the like, and the structure is very simple. To provide a simple civil structure and ground displacement measuring device.

Another object of the present invention is to measure civil structures and ground displacements, which can measure the displacement of any measured object such as the slope displacement of civil structures, the displacement of holes in tunnels, the horizontal horizontal displacement of sidewalls of underground civil works, and the ground settlement displacement of ground subsidence areas. To provide a device.

In order to achieve the above object, according to the first aspect of the present invention, the present invention measures the displacement amount of civil structure slope, ground slope and ground subsidence, civil structure and ground displacement monitoring the safety state of the measured object A measuring device comprising: a plurality of measuring sensors for detecting a tilt displacement of an object to be measured and a tilt signal detected by the measuring sensor is converted into digital signals (A / D) and transmitted to the measuring system main body by serial communication method A plurality of signal converters, a plurality of cylindrical casing each made of a constant length, the measuring sensor and the signal converter is built-in, a plurality of connecting joints to bend the interconnection to the casing, the plurality of cylindrical casing And a plurality of measuring sensors are connected to the measuring system main body through an internal joint part. It provides a civil engineering structure and underground displacement measuring device, characterized in that consisting of a measuring cable connected in parallel.

According to a second aspect of the present invention, the present invention provides a civil engineering structure and a ground displacement measuring apparatus for monitoring the safety state of an object to be measured by measuring the displacement amount such as the slope of the civil structure, the ground slope and the ground subsidence, the measurement object A plurality of measuring sensors for detecting a tilt displacement, a plurality of cylindrical casings each having a constant length and in which the measuring sensors are embedded, a plurality of connecting joints for bending the casings to each other, and the plurality of measuring sensors And a plurality of measuring cables connected to the plurality of cylindrical casings and connecting joints and connected to the measuring system main body, respectively.

According to a third aspect of the present invention, the present invention has a built-in measuring sensor and detects the tilt displacement of the measured object, and then converts the detected tilt signal into a digital signal (A / D) to the measurement system main body in a serial communication manner. A plurality of unit displacement measuring instruments for transmission, a plurality of connecting joint portions for connecting the adjacent unit displacement measuring instruments to be bent mutually, and the measuring sensor are connected in parallel, It provides a civil engineering structure and underground displacement measuring device, characterized in that consisting of a measuring cable connected to the measuring system main body.

The connecting joint part is fixed to the upper end of the cylindrical casing connected to the lower side, and the shaft is fixed to the through hole of the central inner peripheral portion, one end is screwed into the through hole of the shaft fixing portion, the measuring cable of the lower portion in the center A through hole is formed therethrough, and the other end is extended to a hemispherical shape, and the support shaft is formed to be extended, and one end is fixed to the lower end of the cylindrical casing disposed on the upper side, and the other end is coupled between the hemispherical extension and the tip of the shaft And may be configured to be rotatably supported.

In addition, the measurement sensor is used a tilt sensor, length sensor or strain gauge.

Furthermore, the measuring sensor is a single axis sensor employing a single inclination sensor, a biaxial sensor combining two inclination sensors in the orthogonal directions in the X and Y directions, and a triaxial sensor combining the three inclination sensors in the X, Y and Z directions. Any one can be used.

Each of the plurality of unit displacement measuring devices includes a measuring sensor for detecting a tilt displacement of the object to be measured and converts the tilt signal detected by the measuring sensor into a digital signal (A / D) to a measuring system main body in a serial communication manner. It consists of a signal converter for transmitting, and a cylindrical casing for protecting the measurement sensor and the signal converter.

In the present invention, when the measuring device is used for the measurement of the hole displacement of the tunnel, one end of each unit displacement measuring device may be fixed to the inner wall of the tunnel or embedded in the inner wall of the tunnel.

As described above, in the present invention, the measurement cable can be bent for each unit displacement measuring unit without being exposed to the outside, so that any installation site such as various civil structures of measurement sensors, side walls of underground civil construction sites, ground subsidence areas, or the like can be measured. It can be installed easily regardless of whether the sensor is exposed or buried, and by measuring the local minute displacement of the measured object directly by each unit displacement measuring device, it is possible to reduce the measurement error and increase the reliability of the measurement. Capable of catching in a short time and actively responding.

In addition, in the present invention, the structure is very simple and can be easily and conveniently installed and maintained according to the construction by combining a plurality of unit displacement measuring units in the form of modules, and can be applied to the displacement measurement of any object to be measured.

(Example)

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

3 is a cross-sectional view illustrating a civil structure and a ground displacement measuring apparatus using a plurality of measuring sensors according to the present invention, and FIG. 4 is a cross-sectional view of a connection joint part for interconnecting a plurality of unit displacement measuring devices according to the present invention.

Referring to FIG. 3, the civil structure and the underground displacement measuring apparatus 50 using the plurality of measuring sensors according to the present invention mutually connect a plurality of unit displacement measuring instruments 50a-50c and adjacent unit displacement measuring instruments 50a-50c. A plurality of connecting joints 33a and 33b for bendable connection and two internal lines for transmitting the measurement signals detected by the unit displacement measuring devices 50a to 50c to the measurement system main body 60 by serial communication. It consists of a measuring cable 30 which is connected in parallel.

Each of the plurality of unit displacement measuring units 50a-50c includes, for example, a measuring sensor S 31a and 31b and a measuring sensor S 31a for detecting a tilt displacement of an object to be measured, such as an inclination sensor or a length sensor. And a signal converter (C: 34a, 34b) for converting (A / D) the inclination signal detected by < RTI ID = 0.0 > 31b) < / RTI > into a digital signal and transmitting it to the measurement system main body 60 in a serial communication manner.

Each of the measuring sensors S: 31a and 31b and the signal converters C: 34a and 34b is fixed together inside a cylindrical casing 32a and 32b having a predetermined length, and each of the measuring sensors 31a and 31b. In order to transmit the measurement signal detected through the built-in signal conversion unit (C: 34a, 34b) to the measurement system main body 60 in a serial communication method to the measurement cable 30 including two lines therein. It is connected in parallel.

The measuring sensors 31a and 31b are single axis sensors (X direction) employing a single inclination sensor, biaxial sensors (X and Y directions) combining two inclination sensors in an orthogonal direction, and three Various types of sensors, such as multi-axis sensors (X, Y, Z directions) that combine tilt sensors in the X, Y, and Z directions, can be selected. In this case, various civil measurement analysis can be further improved. In addition, in addition to the inclination sensor or the length sensor according to the civil measurement purpose, by changing the type of the sensor such as strain gauge can be more maximized the measurement effect. In general, length sensors are mainly used to measure displacement of civil structures, and incline sensors are used to measure settlement displacement of ground.

In addition, the plurality of connection joints 33a and 33b are fixed by a plurality of fixing screws 44 on the upper end of the cylindrical casing 32b connected to the lower side as shown in FIG. A male screw thread is formed on the outer circumferential surface so that one end is screwed into the shaft fixing portion 43 with the bent 43a and the through hole 43a of the shaft fixing portion, and the measuring cable 30 at the lower portion can pass through the center portion. The through hole 41a is formed, and the other end is fixed by the fixing screw 45 at the lower end of the support shaft 41 formed by extending in a hemispherical shape and one end of the cylindrical casing 32a disposed on the upper side, The inner circumferential portion 42a has an inner diameter somewhat larger than the outer diameter of the hemispherical expansion portion 41b of the support shaft 41, and the other end is coupled between the hemispherical expansion portion 41b and the tip portion of the shaft fixing portion 43 so as to be rotatable. It consists of the drive part 42 supported.

In the embodiment structure shown in FIG. 3, each measurement sensor 31a, 31b is connected in parallel to a single measurement cable 30 connected to the measurement system main body 60 through the signal converters 34a, 34b. As a result, the line connection between the plurality of unit displacement measuring units 50a-50c and the measuring system main body 60 is made very simple, and the installation can be easily performed.

However, the displacement measuring apparatus 50 of the present invention transmits the detection signal measured from each of the measuring sensors 31a and 31b as shown in FIG. 3 through the signal converter C: 34a and 34b. Instead of transmitting to the measurement system main body 60, a measurement cable to each of the measurement sensors 31a and 31b without incorporating signal conversion units C: 34a and 34b in the plurality of unit displacement measuring units 50a to 50c. It is also possible to connect the respective and a plurality of measuring cables are connected to the measurement system body through the connecting joint (33a, 32b).

In the displacement measuring apparatus 50 of the single measuring cable connection method shown in FIG. 3, the serial number of Patent No. 0291852 proposed by the present inventor is proposed when collecting measurement signals from the plurality of measuring sensors 31a and 31b to the measuring system main body 60. Automatic measurement device for inclination displacement using communication and its method can be used to measure digitally without limiting the number of inclination sensors and measuring distance, and to increase the measurement efficiency.

Automatic device for measuring tilt displacement using serial communication of Patent No. 0291852 includes a plurality of tilt sensors installed on a plurality of measured portions and outputting a plurality of tilt displacements corresponding to the tilt displacement of each of the measured units, and the plurality of tilt inclinations. A plurality of signal conversion units for converting the inclination displacement signal from the sensor into digital and transmitting digital conversion data by serial communication method when its address is called; and a plurality of signal conversion units installed remotely from the plurality of signal conversion units The sensor control unit sequentially assigns the measurement data transmission to the signal conversion unit, receives and stores the converted measurement data serially, and controls the transmission / reception of the measurement data, and a main computer that receives the measurement data from the sensor control unit and analyzes and informatizes it. Consists of.

The serial communication method adopted by the automatic measurement device for tilt displacement is simply composed of two lines from the sensor control unit, adopts the RS-485 communication method, and the communication distance reaches several kilometers. RS-485 communication method connects multiple devices on one line, assigns unique address to each device, and then enables multi-point transmission and reception with a desired device on the host. Mode (Multi_Point Mode) is supported.

Therefore, the automatic measurement of the inclination displacement by serial communication of RS-485 communication method instructs each signal conversion unit to measure the inclination displacement by the inclination sensor and A / D conversion operation by the serial communication protocol method from the sensor control unit. The signal converter waiting for monitoring at all times recognizes its own address and performs A / D conversion, and transfers the converted digital data to the sensor controller through the serial communication method, and transmits the data collected by the sensor controller through the serial communication method. It stores the information, such as the measurement time and the stored state on the display panel, and transfers the collected data to the main computer, the data is analyzed and plotted and informed from the received main computer.

Displacement measuring device 50 according to the present invention is a measurement sensor (31a, 31b) for outputting the inclination displacement corresponding to the inclination displacement of each unit to be measured, respectively (for example, Tilt sensor) and signal converters 34a and 34b, and transmits data measured by serial communication to a measurement system main body 60 composed of a sensor control unit and a main computer installed at a remote location.

In this case, in the displacement measuring apparatus 50 according to the present invention, a plurality of unit displacement measuring units 50a-50c may be mutually bent between adjacent unit displacement measuring units 50a-50c by a plurality of connecting joint parts 33a and 33b. Because of its connection, it is very easy to apply not only to civil structures but also to measurement of underground displacement.

5 is an installation sectional view showing a state buried in the ground of a civil construction site using a displacement measuring device according to the present invention as a horizontal horizontal displacement measuring device.

As shown in FIG. 5, the displacement measuring apparatus 50 of the present invention has a side wall 10a for measuring that the side wall 10a of the construction site is inclined in a horizontal direction such as an underground foundation work or a subway construction site of a new building. It is installed perpendicularly to the inner ground 10.

Since the ground horizontal displacement measurement of the present invention does not use a single inclinometer as in the prior art, a hole is drilled in the ground as shown in FIG. 5, and the unit displacement measuring units 50a and 50b are connected to each other by the number of sensors required for a civil engineering site. Connect to (33a, 33b) and push it into the ground (地 中) (10).

Therefore, in the present invention, when the horizontal displacement 16 occurs in the ground 10, since the displacement measuring instruments 50a and 50b of a certain length are inclined by one word based on the joint joints 33a and 33b, the displacement measuring unit (for each node) After the displacements of the measuring sensors 31a and 31b embedded in the 50a and 50b are converted into digital signals by the signal converters 34a and 34b, the measuring system main body is sequentially operated by serial communication via the measuring cable 30. It is transmitted to 60 to be able to detect the horizontal displacement of the ground (10).

In addition, when measuring ground subsidence, the displacement measuring device 50 shown in Fig. 5 is installed lying on the ground in the horizontal direction. That is, when the displacement measuring instruments 50a, 50b connected by the connecting joints 33a, 33b in parallel with the ground are provided as necessary, the displacement due to the ground subsidence can be easily measured.

As described above, in the present invention, the measurement cables 31a and 31b and the measurement cables 30 are exposed inside the cylindrical casings 32a and 32b and the connection joints 33a and 33b. Each unit displacement meter can be bent. As a result, in the present invention, the measurement sensor behaves like the object to be measured, and by measuring the local minute displacement of the object to be directly detected for each unit displacement measuring device, the measurement error is reduced and the rapid detection is performed at the initial time when the minute displacement is generated. This is possible and can increase the reliability of the measurement.

6 is an installation sectional view showing a state in which the displacement measuring device according to the present invention is installed in the tunnel ceiling for measuring the displacement in the tunnel.

When the displacement measuring device according to the present invention is used for tunnel hole displacement measurement, first, a plurality of displacement measuring instruments 50a- connected by a plurality of connecting joint parts 33a-33c to the length required for the tunnel inner wall 20 as shown in FIG. 3. 50d) is assembled in advance.

After that, one end of each displacement measuring instrument 50a-50d is fixed to the tunnel inner wall 20 by fixing anchors 55a-55e to simply complete the installation.

When the installation is completed as described above, the measurement cable 30 from the displacement measuring device 50a-50d is connected to the measuring system main body (not shown), and the displacement of each sensor is measured, and the required civil engineering unit (usually In mm), the stability of the structure can be determined based on the trend of cross-sectional change of the civil structure.

In addition, the displacement measuring apparatus of the present invention can be embedded because the measuring cable has a structure built into the device. Therefore, when measuring the deflection of the tunnel ceiling or the displacement of the tunnel tip, the measurement data can be obtained simply by attaching them to the tunnel ceiling side by side or embedding them inside the tunnel wall.

As shown in FIG. 6, the displacement measuring device of the present invention does not require a sensor connection fixing device as in the conventional case and does not need a separate arrangement for the measurement cable when using the tunnel hole displacement measurement. In addition, it can be used in any type of exposed or buried type, and can be easily used for construction and permanent measurement during construction.

In the above description, the ground horizontal displacement measurement and the hole displacement measurement of the tunnel have been described as an example. However, the present invention has no limitations in the installation place, and therefore, in the field for measuring displacement of civil structures such as roads, soft grounds, bridges, dams, etc. It is possible to apply variously.

As described above, in the present invention, there is no need for a conventional inclination pipe, a tilt sensor measuring roller, a sensor connection fixing device, and the like, and the structure is very simple. Is simple.

In addition, by embedding the measuring cable in the casing without exposing the sensor to the outside of the sensor, it can be installed easily regardless of the sensor installation location and whether the sensor is buried to measure the tilt displacement of the ground and the structure to be measured. It operates in the same way as, and by directly sensing and measuring, measurement error can be reduced and measurement reliability can be increased.

In addition, since it can be installed without constraints such as installation location, measurement location, and whether the sensor is embedded, there is an effect that can measure the deformation amount and ground settlement of the civil structure of various shapes.

In the above, the present invention has been illustrated and described with reference to specific preferred embodiments, but the present invention is not limited to the above-described embodiments, and the present invention is not limited to the spirit of the present invention. Various changes and modifications can be made by those who have

Claims (9)

In the civil structure and ground displacement measuring apparatus for measuring the amount of displacement of civil structure slope, ground slope and ground subsidence, and monitor the safety state of the object A plurality of measuring sensors for detecting a tilt displacement of the measured object; A plurality of signal converters for converting the inclination signal detected by the measuring sensor into a digital signal (A / D) and transmitting the same to the measuring system main body by serial communication; A plurality of cylindrical casings each having a constant length and in which the measuring sensor and the signal conversion unit are built; A plurality of connecting joints for bending the casing to each other; It is composed of a measuring cable connected to the measurement system body through the plurality of cylindrical casing and connecting joints and the plurality of measuring sensors are connected in parallel through a signal conversion unit, The plurality of cylindrical casing and the plurality of connection joints are installed in the object to be measured, the civil structure and underground, characterized in that the bending of the cylindrical casing around the connection joint in response to the displacement generated in the object to be measured Displacement measuring device. In the civil structure and ground displacement measuring apparatus for measuring the amount of displacement of civil structure slope, ground slope and ground subsidence, and monitor the safety state of the object A plurality of measuring sensors for detecting a tilt displacement of the measured object; A plurality of cylindrical casing each made of a constant length and the measuring sensor is built-in, A plurality of connecting joints for bending the casing to each other; And a plurality of measuring cables connected to the plurality of measuring sensors, respectively, and connected to the measuring system body through the plurality of cylindrical casings and connecting joints. The plurality of cylindrical casing and the plurality of connection joints are installed in the object to be measured, the civil structure and underground, characterized in that the bending of the cylindrical casing around the connection joint in response to the displacement generated in the object to be measured Displacement measuring device. A plurality of unit displacement measuring instruments each having a built-in measuring sensor and detecting a tilt displacement of the object to be measured and converting the detected tilt signal into a digital signal (A / D) and transmitting the measured tilt signal to the measurement system main body by serial communication; A plurality of connecting joints for mutually bending the adjacent unit displacement meters, The measuring sensor is connected in parallel and consists of a measuring cable connected to the measuring system main body through a plurality of unit displacement measuring instruments and a plurality of connecting joints, The plurality of unit displacement measuring units and the plurality of connection joints are installed in the object to be measured, the civil structure, characterized in that bending of the unit displacement measuring unit around the corresponding connection joint portion corresponding to the displacement generated in the object to be measured And underground displacement measuring device. The method of claim 1, wherein the connecting joint portion An anchoring part fixed to the upper end of the cylindrical casing connected to the lower side, the through hole is bent in the central inner peripheral portion, A support shaft having one end screwed into the through hole of the shaft fixing portion, a through hole through which a lower measuring cable can pass, and an extended end extending in a hemispherical shape at the other end thereof; A civil engineering structure and underground displacement measuring device, characterized in that the one end is fixed to the lower end of the cylindrical casing disposed on the upper side, and the other end is composed of a drive unit that is rotatably supported by being coupled between the hemispherical extension and the tip of the shaft. The civil engineering structure and ground displacement measuring apparatus according to any one of claims 1 to 3, wherein the measuring sensor is an inclination sensor, a length sensor or a strain gauge. The sensor according to any one of claims 1 to 3, wherein the measuring sensor comprises a single axis sensor employing a single tilt sensor, a biaxial sensor combining two tilt sensors in the orthogonal directions in the X and Y directions, and three tilt sensors. Civil structure and underground displacement measuring device, characterized in that any one of the three-axis sensor combined in the X, Y, Z direction. The apparatus of claim 3, wherein each of the plurality of unit displacement meters A measurement sensor for detecting a tilt displacement of the object to be measured; A signal converter for converting the tilt signal detected by the measuring sensor into a digital signal (A / D) and transmitting the serial signal to the measuring system main body by serial communication; Civil structure and underground displacement measuring device comprising a cylindrical casing for protecting the measuring sensor and the signal converter. 4. The civil engineering structure and underground displacement measuring apparatus according to claim 3, wherein when the measuring apparatus is used to measure the displacement of the tunnel, one end of each unit displacement measuring instrument is fixed to the inner wall of the tunnel. The civil engineering structure and underground displacement measuring apparatus according to claim 3, wherein the measuring apparatus is embedded in the inner wall of the tunnel when the measuring apparatus is used to measure the hole displacement of the tunnel.

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