JP6639136B2 - Simple alarm system for reinforced earth walls - Google Patents

Description

  The present invention relates to a simple alarm system for reinforced earth walls, and a simple method for laying embankment reinforcement materials such as steel and geotextile in embankment to easily deform an embankment reinforced earth wall constructed on a vertical or nearly vertical wall. A warning is issued by detecting the warning in the vicinity to notify the danger to the surroundings or that a detailed inspection or investigation is necessary.

  BACKGROUND ART An embankment reinforced soil wall constructed by facing a road, a residential land, or the like by embedding embankment reinforcing materials such as a steel strip, geotextile, or an anchor in a plurality of layers during embankment is known.

  This type of reinforced earth wall is constructed by laying embankment reinforcing materials such as steel strip and geotextile for every fixed layer thickness of the embankment during embankment, and stacking wall panels such as concrete panels on the front of the embankment, It is constructed by joining the ends of the embankment reinforcement.

  In each case, the vertical or near vertical wall can be realized by maintaining the balance with the earth pressure acting on the vertical or near vertical wall by the pull-out resistance of multiple embankment reinforcements laid in the embankment It was made.

  For example, Patent Literature 1 discloses a reinforced soil wall constructed by laying a plurality of layers of strip-shaped steel material called a strip in an embankment (tail armor method), and Patent Literature 2 discloses a geotextile of a polymer material in an embankment. A reinforced earth wall constructed by laying a plurality of layers is disclosed (geotextile method).

  By the way, in recent years, landslides such as landslides, debris flows, and landslides due to typhoons and heavy rain have frequently occurred due to abnormal weather caused by underground warming. The measures against the above-mentioned earth and sand disaster are desired. In addition, there is a concern that deterioration of social infrastructure such as road structures may occur due to aging, etc., and it is necessary to identify them promptly and take countermeasures. Reinforced soil structures are no exception.

  The daily inspection of the road structure is carried out from the vehicle, and it is naturally desired that the above-mentioned reinforcing soil structure can be checked for abnormality by the same inspection.

  Patent Literature 3 discloses an invention related to a ground behavior monitoring device that monitors and predicts and analyzes displacement behavior of the ground over time. The present invention provides a target installed at a monitored point such as a slope, distance measuring and angle measuring means for measuring a distance from the monitored point to the target of the monitored point and horizontal and vertical angles with time. Monitoring means for calculating the coordinate value of the monitored point from the measurement data of the distance measuring / angle measuring means and monitoring the displacement behavior over time, and installing the target and the distance measuring / angle measuring means to the ground. It is possible to easily monitor the displacement behavior over time.

  It is also possible to judge the level of the displacement behavior of the ground in real time from the measurement data of the distance measuring and angle measuring means, to issue an alarm, and to perform a prediction analysis in the future.

JP-A-11-36308 JP 09-279581 A JP 09-21636 A JP 2002-39810 A

  However, in the conventional monitoring method, there is a problem that a worker requires a lot of labor and labor to check the deformation of the reinforced earth wall on site, which increases the cost.

  In addition, there is a risk that an invisible deformation may be missed in an inspection from the vehicle, and the device is not necessarily sufficient as a device for preventing a disaster before it occurs.

  In addition, the monitoring method using the device disclosed in Patent Document 3 has problems that various devices are required, the initial cost is high, and that specialized knowledge is required for handling.

  The present invention has been made in order to solve the above problems, and deformation of a reinforced soil wall constructed on a vertical or nearly vertical wall surface by laying an embankment reinforcing material made of steel material or geotextile in the embankment. The purpose of the present invention is to provide a simple alarm system for reinforced earth walls that can detect that there is a danger to the surroundings or that detailed inspection and investigation is necessary by detecting the It is.

  The present invention relates to a simple alarm system for a reinforced earth wall for detecting a deformation of a reinforced earth wall by a simple method and issuing an alarm to notify a danger to the surroundings or a need for detailed inspection and investigation. A deformation sensor installed on the wall of the reinforced earth wall, an alarm judgment device for judging the necessity of issuing an alarm from the distortion of the deformation sensor due to the deformation of the reinforced earth wall, and an alarm judgment device And a power supply device that activates the deformation sensor, the alarm determination device, and the alarm device by notifying the surroundings by issuing an alarm in response to an alarm signal from the device. Things.

  The present invention provides a method of laying an embankment reinforcing material made of a steel material, geotextile, or the like in the embankment, and embedding the embankment reinforcing wall to be constructed on a vertical or nearly vertical wall surface, as well as a mortar or concrete spraying method, a method using cast-in-place concrete. In addition to lining the ground by means of framing or slope lining with concrete panels or concrete blocks, a number of rod-like reinforcements made of reinforcing steel, rock bolts, etc., which fix these linings to the ground, are applied to the ground. The present invention can also be applied to a cut-soil-reinforced earth wall constructed by construction.

  In addition, as for the embankment reinforced soil wall, as long as it is a reinforced earth structure using embankment, the application object is not particularly limited, and the embankment can be applied to a dike or the like.

  In addition, deformation of the embankment reinforcing earth wall, for example, subsidence of the embankment or foundation ground supporting the embankment, displacement of the embankment, displacement, inclination of the wall panels constituting the wall surface, furthermore, such as opening of joints between each wall panel It is desirable that the deformation sensor be installed on the reinforced soil wall surface because most of the displacement sensors involve displacement of the reinforced soil wall surface.

  However, since the displacement of the reinforced soil wall affects the uppermost wall panel among the multiple panels that make up the wall or the hessian concrete installed at the uppermost level of the wall, the deformation sensor is connected to the uppermost wall. It is also effective to install it only on panels or heseki concrete.

  In addition, the deformation sensor shall be installed on a plain or RC foundation installed below the ground surface to support the wall, or on both the foundation and the upper end of the wall (top wall panel or hessian concrete) Can also. Further, the deformation sensor may be installed on a guardrail, rigid fence or fall-prevention fence installed on the upper end of the reinforced earth wall, and on these foundations.

  In particular, when the deformation sensor is installed on a wall surface, the deformation sensor is continuously arranged horizontally on the rear side of the wall surface along the wall surface, and is installed in a plurality of stages in the vertical direction. Continuous along the wall in the vertical direction, and can be installed at regular intervals in the horizontal direction. Furthermore, they can be installed in a grid in the horizontal and vertical directions, or diagonally. Also. A plurality of these installation forms may be combined.

  In addition, the deformation sensor can be easily attached to the surface of a wall panel, a head stone, a foundation, or the like by using an adhesive or a fastener, and a groove can be formed in these surfaces and embedded therein. This allows the alarm system of the present invention to be applied to existing reinforced earth walls.

  As the deformation sensor, a sensor including a strain gauge, an optical fiber, an inclinometer, a displacement meter, a gyro sensor, a distance meter, a vibrometer, an accelerometer, or the like can be used, and these can be used alone or in combination. In addition, by installing the same type of sensor with different set values, it is possible to detect not only the presence or absence of deformation of the reinforced earth wall, but also the degree of deformation, thereby reducing the degree of deformation before danger. Measures can be taken accordingly.

  The alarm determination device is a device for determining the necessity of a warning from the deformation of the reinforced soil wall detected by the deformation sensor, for example, the amount of strain or inclination of the upper end portion of the reinforced soil wall, or the amount thereof. It suffices if both the deformations are always detected by the deformation sensor, and an alarm signal is transmitted to the alarm device when the absolute value or the amount of change exceeds a preset value.

  An alarm device is a device that receives an alarm signal from an alarm determination device and notifies the surroundings of danger by a warning sound or a warning light, for example, an alarm sound, a warning light, an electric bulletin board, or a communication device. An alarm may be provided to the surroundings by a receiver mounted on a passing vehicle for inspection to notify the surroundings of danger or a need for detailed inspection or investigation. Note that the receiver here includes a radio, a smartphone, a mobile, and the like.

  Further, the danger may be notified by a warning light such as an LED installed in a place visible from a general vehicle passing through. Further, a warning sound or a warning light may be used to notify the surroundings of a danger, and at the same time, a warning signal may be notified to a management center or a local person by wire or wirelessly, thereby enabling remote management.

  As the power supply device, electric power generated by energy harvesting technology of photovoltaic power generation, thermal power generation, vibration power generation, and electromagnetic wave power generation, or a battery or a lithium battery storing the power can be used. For example, by using energy harvesting technology that generates power by sunlight or road vibrations, or by supplying the battery using a battery or lithium battery that stores electricity, the running cost can be significantly reduced.

  According to the present invention, a deformation sensor that detects deformation of a reinforced soil wall, an alarm determination device that determines the necessity of issuing an alarm from the deformation value of the deformation sensor, and an alarm based on the determination result of the alarm determination device By providing an alarm device that emits noise and the above-mentioned deformation sensor, an alarm determination device, and a power supply device for the alarm device, to prevent deformation such as embankment and the subsidence of the reinforced soil wall such as settlement of the ground supporting the embankment in advance. In addition to alerting people to the danger and alerting them to danger, it also alerts them to the need for detailed inspections and investigations, so that necessary measures can be taken immediately before a disaster occurs.

  Also, in the inspection from the vehicle, the inspection accuracy can be improved by an alarm generated by the alarm system and data received from the sensor. Further, not only inspections but also ordinary passers-by and passing vehicles can be aware of the situation by warning or the like, and can detect danger.

  In particular, by using sensors composed of optical fibers and strain gauges as deformation sensors, using warning lights such as rotating lights as alarm devices, and using solar panels together with power supply devices, system simplification can be achieved. The initial cost and running cost can be reduced.

An embankment reinforced soil wall constructed on a vertical or near-vertical wall by laying a plurality of strips called strips in the embankment, Fig. 1 (a) is a vertical sectional view, Fig. 1 (b) is deformed FIG. 1 (c) is a longitudinal sectional view of an upper end portion of the embankment reinforced soil wall in which the sensor is installed, and FIG. FIG. 2 is a partial front view of the embankment reinforcing earth wall illustrated in FIG. 1. It is explanatory drawing of a warning system.

  FIGS. 1 to 3 illustrate an embankment reinforced earth wall constructed to face a road, a residential area, and the like. The embankment reinforced earth wall 1 is constructed using an excavated soil at the site as an embankment, and has an embankment having a predetermined thickness. By alternately laminating a plurality of strips 2 called strips 2 and strips in a plurality of layers, a plurality of strips 3 are laid in the embankment 2 at predetermined layer thicknesses.

  Further, a cloth foundation 4 having a straight or RC structure is formed on the ground surface in front of the embankment, and a plurality of wall panels 5 holding the embankment 2 on the cloth foundation 4 are arranged almost vertically along the wall surface of the embankment 2. The end portions of the steel strips 3 are connected to the wall panel 5. As shown in FIG. 1 (c), a head stone 6 having a straight or RC structure may be formed at the upper end of the uppermost wall panel 5.

  The upper end of the embankment 2 is finished according to the use. For example, when the embankment 2 is used as a sidewalk or a roadway, the roadbed 7 is formed by asphalt pavement or concrete pavement.

  As the wall panel 5, a concrete panel is mainly used, and a steel panel, a wire mesh panel, or the like may be used, and the material is not particularly limited. In addition, a geotextile, a steel anchor, or the like may be used instead of the strip 3.

  The embankment-reinforced soil wall 1 constructed in this manner is subjected to deformation of the embankment-reinforced soil wall 1, for example, subsidence, displacement, and movement of the embankment 2 or the ground supporting the embankment 2, or inclination of the wall panel 5, and further, each wall panel. Detecting deformation that could lead to collapse of the embankment-reinforced soil wall 1, such as the opening of joints between 5,5, and issuing a warning to alert the danger to the surroundings or that detailed inspection or investigation is necessary. An alarm system is provided to alert you.

  The warning system includes a deformation sensor 8 that detects a deformation of the embankment reinforcing soil wall 1, a deformation signal from the deformation sensor 8, and an alarm determination device 9 that determines the necessity of issuing a warning and the warning. An alarm device 10 for receiving a warning signal from the judging device 9 and issuing an alarm to the surroundings to notify the surroundings of danger, the deformation sensor 8, the alarm judging device 9 and the power supply device 11 of the alarm device 10 are provided. Have.

  A sensor made of an optical fiber is used as the deformation sensor 8, and the deformation sensor 8 is provided between the plurality of wall panels 5, 5 on the rear surface of the plurality of wall panels 5, which are adjacent in the uppermost row in the horizontal direction. It is installed horizontally straddling. As shown in FIG. 1 (b), when the cap stone 6 is formed, the deformation sensor 8 is installed horizontally along the cap stone 6 on the back surface of the cap stone 6.

  Then, when the wall surface panel 5 of the embankment reinforcing soil wall 1 is deformed as shown in FIG. 2 due to, for example, settlement of the ground, the deformation sensor 8 is distorted (broken line in FIG. 2), so that the embankment reinforcing soil is generated. The deformation of the wall 1 is sensed.

  The alarm judging device 9 is a device for judging the necessity of issuing an alarm from the distortion of the deformation sensor 8. When the distortion amount of the deformation sensor 8 exceeds the initially set value, the alarm judging device 9 gives the alarm judging device 9. Send an alarm signal.

  The warning device 10 is a device for notifying the surroundings of the danger caused by the deformation of the embankment reinforcing soil wall 1, and a rotating light, a siren, or both are used.

  In the embodiment, the rotating light is installed at a position that can be seen from the surroundings such as a roadside zone. In addition, by specifying the contact information on the alarm device 10, not only the inspector but also the general public who knows the abnormality by the alarm device 10 can contact the local management office and the person in charge. ing.

  The power supply device 11 is a device for supplying power to the deformation sensor 8, the alarm determination device 9, and the alarm device 10, and uses a battery having a solar panel.

  The present invention provides an alarm by detecting a deformation of a reinforced earth wall constructed on a vertical or nearly vertical wall by laying an embankment reinforcing material such as steel or geotextile in the embankment by a simple method and issuing an alarm. To inform you of the danger or the need for detailed inspection and investigation.

1 embankment reinforced earth wall 2 embankment 3 band steel (embankment reinforcement material)
4 Cloth foundation 5 Wall panel (wall material)
6 Kaseki concrete 7 Roadbed 8 Deformation sensor 9 Alarm judgment device
10 Alarm device
11 Power supply

Claims (3)

A deformation sensor for detecting deformation of the reinforced earth wall, an alarm determination device for determining the necessity of issuing an alarm from the deformation value of the deformation sensor, and an alarm device for issuing an alarm based on the determination result of the alarm determination device In the simple alarm system for a reinforced earth wall comprising the deformation sensor, the alarm determination device, and a power supply device of the alarm device, the deformation sensor is a top-level member forming a wall surface of the reinforced earth wall. The surface of wall material, the surface of hessian concrete installed on the upper end of the reinforced earth wall, or the surface of a guardrail, rigid protective fence or fall prevention fence installed on the upper end of the reinforced earth wall and their foundations A simple alarm system for reinforced earth walls, which is installed horizontally on the surface of a building . 2. The simple alarm system for a reinforced earth wall according to claim 1 , wherein the alarm device is configured to notify a danger to the surroundings by an alarm sound, a warning light, or an electric bulletin board , or that a detailed inspection or investigation is required. A simple alarm system for reinforced earth walls. 3. The simple alarm system for a reinforced earth wall according to claim 1 , wherein the power supply device is a power generated by an energy harvesting technology of photovoltaic power generation, thermal power generation, vibration power generation, electromagnetic power generation, a battery storing the power, or lithium. A simple alarm system for reinforced earth walls, which is a battery.

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