FR3102199A1 - Cantilever work platform comprising a geolocation beacon and method for controlling a layout plan of a plurality of cantilever work platforms - Google Patents

Abstract

A cantilevered work platform configured to be fixed to a vertical wall and adapted to support a shuttering (B), the cantilevered work platform comprising at least one satellite geolocation beacon (41) so as to determine a position (P) of the cantilevered work platform. Abstract figure: Figure 3

Description

Cantilevered work platform comprising a geolocation beacon and method for controlling a layout plan for a plurality of cantilevered work platforms

GENERAL TECHNICAL FIELD AND PRIOR ART

The present invention relates to the field of formwork and, more particularly, the monitoring of a construction site using a plurality of formwork devices.

To make a collective building, it is generally used a plurality of formwork devices, for example, a vertical formwork panel or a vertical formwork panel. In practice, the formwork devices are moved successively on the construction site to form successive parts of a building.

For each part of the building to be constructed, the formwork devices must be positioned precisely in accordance with a predetermined layout plan. For example, when several formwork panels have to be joined laterally and vertically, it is important that each formwork panel is positioned correctly in the assembly in order to produce concrete walls of the correct height and of the correct length. In practice, the formwork devices can be positioned incorrectly, which can lead to delays (the formwork devices must be repositioned), formwork defects or risks to the safety of operators.

One of the objectives of the present invention is to facilitate the control of the positioning of the formwork devices in an assembly in order to ensure rapid, qualitative formwork operations that guarantee the safety of the operators.

GENERAL PRESENTATION OF THE INVENTION

To this end, the invention relates to a formwork device comprising a formwork face adapted to be in contact with concrete. The invention is remarkable in that the formwork device comprises at least one satellite geolocation beacon so as to determine a position of the formwork device.

Thus, the formwork device can be conveniently and quickly located over time. This advantageously makes it possible to check whether the formwork device is positioned in accordance with a determined layout plan in order to produce formwork of quality and in complete safety.

Preferably, the satellite geolocation beacon has an accuracy of less than 2 meters, preferably 1 meter. This advantageously makes it possible to detect when two formwork devices have been reversed in a layout plan. In known manner, a formwork device has a length of the order of 2 to 3 meters. Thanks to the invention, even if the formwork devices are close to each other, a positioning error can be detected.

Preferably, the formwork device comprises at least one wireless communication device configured to transmit the position to a computer via a communication network. Advantageously, the position of the formwork device can be obtained remotely, preferably remotely from the place of use of the formwork devices. This advantageously allows a builder to track and control the position of all of his formwork devices centrally. In addition, such a communication device makes it possible to process the positions obtained in order to detect any error or anomaly (device lost, not used, etc.). Preferably, the communication device is connected to a low speed network, in particular, of the Lora ® or Sigfox ® type.

Preferably, the wireless communication device is configured to transmit the position to a communication network periodically. Thus, the power consumption of the wireless communication device is reduced compared to continuous transmission. This is particularly advantageous since the rental periods of a formwork device can extend over several months. The formwork devices are thus only recharged when the rental is returned.

Preferably, the wireless communication device is configured to transmit the position of the device, an identifier of the formwork device and a measurement instant. The position of each formwork device is tracked over time.

According to a preferred aspect, the formwork device comprises at least one accelerometer configured to detect movement of the formwork device and to inhibit the satellite geolocation beacon and/or the communication module in the event of absence of movement for a predetermined period . Thus, the accelerometer makes it possible to avoid the emission of identical positions over time. Energy consumption is then reduced to transmit only relevant positions.

Preferably, the accelerometer is configured to inhibit the satellite geolocation beacon in the event of displacement of less than 20 cm. Advantageously, when the formwork device is moved a short distance, for example during a stripping phase, no position is transmitted, which makes it possible to limit the energy consumption to communicate only positions relevant. A formwork device according to the invention consumes little energy, which reduces the number of refills.

Preferably, the formwork device comprises a location module comprising the geolocation beacon and the communication device. Such a location module can be conveniently mounted to the formwork device, in particular, detachably. This makes it possible to apply the invention to formwork devices according to the prior art in a practical manner.

Preferably, the location module includes a source of electrical energy to autonomously power the satellite geolocation beacon and/or the communication device. Thus, the localization module is energy self-sufficient, which makes it possible to detect the position of a formwork device in a practical way, without constraint.

The invention also relates to a geolocation system comprising a plurality of formwork devices as presented above and at least one computer configured to obtain the positions of the plurality of formwork devices via the communication network. Thus, an operator can obtain all the positions of the formwork devices centrally. In addition, the computer makes it possible to determine errors or anomalies concerning the positioning or location of the formwork devices.

The invention further relates to a method for geolocating a plurality of formwork devices as presented above, each formwork device being connected to a communication network. The geolocation method comprises a step of transmission, by each formwork device, of an identifier of the formwork device and of a position of the formwork device at a given time via the communication network.

In a preferred aspect, the method includes:

• a step of periodically sending, by each formwork device, an identifier of the formwork device and a position of the formwork device at a given time to a computer via the communication network and
• a step of recording in a current database an identifier of the formwork device and a position of the formwork device at a given instant at each periodic transmission.

Preferably, the method includes a step of inhibiting the emission step in the event of no displacement of the formwork device greater than a predetermined threshold, in particular 20 cm.

Thanks to the control process, positioning errors are detected quickly to ensure quality formwork that guarantees operator safety. Positioning errors in relation to the layout plan can be detected a posteriori in order to qualify the quality of construction.

Preferably, the method includes a step of sending an alert message if, for a determined identifier, the geolocation information remains unchanged for a duration greater than a predetermined duration threshold. This advantageously makes it possible to detect an abnormal immobilization of a formwork device in order to allow its rapid use on another construction site. For example, the duration threshold is 15 days.

The invention further relates to a method for controlling a layout plan of a plurality of formwork devices as presented previously, each formwork device being connected to a communication network, the layout plan associating an identifier of each formwork device at a theoretical position, the geolocation method includes:

• a step of transmission, by each formwork device, of a position to a computer via the communication network
• a step of comparison, by the computer, of the position with the theoretical position of the layout plan so as to define a positioning difference and
• a step of determining an error if the positioning deviation is greater than a predetermined threshold.

According to one aspect, the formwork device is a formwork panel comprising a vertical wall comprising a formwork front face.

According to another aspect, the formwork device is a formwork panel comprising a horizontal wall comprising a formwork face.

The invention also relates to a cantilevered work platform configured to be fixed to a vertical wall and adapted to support a formwork panel. The cantilevered work platform comprises at least one satellite geolocation beacon so as to determine a position of the cantilevered work platform. Preferably, the cantilevered work platform comprises a location module comprising a geolocation beacon and a communication device.

In general, the present invention has been presented for a formwork device but applies analogously to a cantilevered work platform which must be positioned according to a determined layout plan.

PRESENTATION OF FIGURES

The invention will be better understood on reading the following description, given solely by way of example, and referring to the appended drawings in which:

• Figure 1 is a schematic representation of a formwork according to one embodiment of the invention,
• FIG. 2 is a schematic representation of a location module according to one embodiment of the invention,
• FIG. 3 is a schematic representation of a method for tracking and controlling the location of a formwork according to one embodiment of the invention and
• FIGS. 4 and 5 are schematic representations of the movement of formwork panels between a time T1 and a time T2.

It should be noted that the figures expose the invention in detail to implement the invention, said figures can of course be used to better define the invention if necessary.

DESCRIPTION OF ONE OR MORE EMBODIMENTS AND IMPLEMENTATION

With reference to the , there is shown a formwork panel B according to one embodiment of the invention. The formwork B comprises a vertical wall 11 comprising a front formwork face F1 and a rear face F2 opposite the front formwork face F1. This formwork front face F1 is intended to be placed inside the formwork and to be in contact with the poured material.

In this example, formwork B is defined in an orthogonal coordinate system (X, Y, Z) in which the X axis extends from front to back, the Y axis extends laterally from left to right and the Z axis extends vertically from bottom to top, that is, from a lower part to an upper part.

As shown in , the formwork B comprises an upper platform 12 allowing the movement of at least one operator, in particular, during concrete pouring operations. The formwork B comprises a guardrail 13 mounted on the upper platform 12 to prevent an operator from falling. The upper platform 12 comprises a passage opening, in particular of rectangular shape, in order to allow an operator to access the upper platform 12 via an access ladder 3. The upper platform 12 comprises a hinged hatch to close the passage opening and prevent an operator from falling. In this example, the formwork B also includes a stabilizing ballast 2 connected to the upper platform 12 by crutches in order to prevent the tilting of the vertical form B, in particular, under the force of the wind. In this embodiment, the access ladder 3 fulfills the crutch function but it goes without saying that separate crutches of the ladder 3 could be suitable. As shown in , the stabilizing ballast 2 is mounted facing the rear face F2 and extends laterally along the Y axis. The stabilizing ballast 2 is connected to the lower part of the vertical wall 11.

According to the invention, with reference to the , the formwork form B further comprises a location module 4 which is mounted on the formwork form B, in particular, housed in the vertical wall 11 of the formwork form B. Nevertheless, it goes without saying that the module of location 4 could be located at other positions.

In this example, as shown in , the location module 4 comprises a satellite geolocation beacon 41 so as to determine its position P, a wireless communication device 42 configured to transmit the position P to a communication network as well as a source of electrical energy 43 to supply the geolocation beacon 41 and the communication device 42. Optionally, the location module 4 also includes an accelerometer 44 as will be presented later.

Preferably, the geolocation beacon 41 has an accuracy of less than 2 meters, preferably less than 1 meter, in order to be able to differentiate the position of two formwork panels which are adjacent, in particular, assembled together. In this example, the geolocation beacon 41 is in the form of a GPS chip so as to obtain the position P of the geolocation beacon 41 by communication with one or more satellites. The obtained position P includes latitude and longitude information. According to a particular aspect, the position P obtained includes height data in order to make it possible to determine the vertical position of a formwork device.

In this embodiment, the communication device 42 is in the form of an electronic card configured to send data over a communication network, in particular a telephone and/or data network. A low-speed data network of the Lora ® or Sigfox ® type is preferred. Preferably, the communication device 42 is configured to transmit the position P periodically, in particular once a day. Indeed, given the low frequency of movement of a formwork device, particularly related to the drying time of the concrete, a daily transmission is sufficient. In addition, this advantageously makes it possible to limit the consumption of electrical energy.

Preferably, the communication device 42 is configured to request the position P of the geolocation beacon 41 prior to transmission to the communication network. In other words, the geolocation beacon 41 is activated periodically in order to limit the consumption of electrical energy.

Advantageously, thanks to the source of electrical energy 43, the location module 4 is advantageously self-powered and can be mounted without constraint on a formwork B. Preferably, the location module 4 is removably mounted so that it can be optionally mounted on a formwork device.

Thanks to the location module 4, the formwork form B can be located precisely over time, which is particularly advantageous for controlling formwork operations.

As shown in , the formwork device comprises an accelerometer 44 configured to detect movement of the formwork device and to inhibit the geolocation beacon 41 by satellite and/or the communication module 42 in the event of absence of movement for a predetermined period. Thus, the accelerometer 44 makes it possible to avoid transmission of identical positions P over time. Power consumption is then reduced to transmit only relevant positions. Preferably, the accelerometer 44 is configured to inhibit the satellite geolocation beacon 41 and/or the communication module 42 in the event of a displacement of less than 20 cm. Advantageously, when the formwork device is moved a short distance, for example during a stripping phase, no position P is transmitted, which makes it possible to limit the energy consumption in order to communicate only relevant positions p.

Preferably, the invention also relates to a location system comprising at least one computer 5 and a plurality of formwork devices, in particular a plurality of formwork panels, connected to the computer 5 by the communication network.

The computer 5 preferably takes the form of a computer connected to the Internet network. Preferably, the location system includes an intermediary server 6 to connect the formwork devices with the computer 5 to transmit the positions P of the formwork devices over time. According to a preferred aspect, the intermediation server 6 makes it possible to connect the telephone/low speed network with the Internet network in the manner of a gateway. It goes without saying that the communication networks and sub-networks could be of a different nature.

As shown in , the computer 5 is configured to store in a current database DBc the data transmitted by each location module 4, in particular, the identifier of the formwork device ID as well as its position P at a determined instant T. Preferably , the location module 4 comprises a clock to determine the instant of obtaining the position P.

Thus, over time, it is possible to know for each determined formwork device ID, its position P over time T by consulting the current database DBc. This is particularly advantageous for making it possible to control a formwork layout, to control the rate of use of the formwork devices or to carry out an inventory of a stock of formwork devices.

In known manner, to produce a concrete wall by formwork, it is necessary to use a plurality of formwork devices which must be positioned and assembled in accordance with a predetermined layout plan Pc. As is known, the Pc layout plan is defined by a design office according to the type of building to be built.

Advantageously, as illustrated in , a layout plan Pc associates, for each construction stage, a determined formwork device ID with a theoretical position PTH.

According to a first example of implementation of the invention, the layout plan is compared with the current database DBc, in particular, to verify that a determined formwork device ID is indeed at its theoretical position P _TH . In practice, for each determined formwork device ID, the position P of the current database DBc is compared with the theoretical position Pth defined in the layout plan Pc in order to detect a positioning fault.

Given the precision of position P, an inversion of formwork devices can be easily detected and then corrected in order to produce formwork that complies with the layout plan Pc to guarantee optimal safety and the absence of defects.

For example, with reference to the , at time T1, the formwork panels ID1, ID2, ID3 are respectively located at positions A, B, C. With reference to the current database DBc, the current positions P conform to the theoretical positions Pth of the plan of Pc layout. Then, with reference to the , at time T2, the formwork panels ID1, ID2, ID3 have been moved and are respectively located at positions E, D, F. With reference to the current database DBc, the current positions P of the formwork panels ID2 , ID3 do not conform to the theoretical positions Pth defined in the layout plan Pc, which leads to the transmission of an alert message by the computer 5 for the formwork panels ID2, ID3. Thanks to the invention, any positioning fault is determined quickly and conveniently. When the vertical position of a formwork is known, it is advantageously possible to detect any fault in vertical positioning.

Such a layout check can be carried out directly after the formation of the formwork with the formwork devices but also a posteriori, that is to say, after the formation of the concrete wall. Indeed, as the position P of each formwork device is known over time, the use of each formwork device can be precisely controlled.

Advantageously, the current database BDc also makes it possible to determine which formwork devices are used and which are unused on a construction site so as to optimize the rental of the formwork devices.

The invention was presented for a vertical formwork device but the invention also applies to a horizontal formwork device. Similarly, the invention also relates to a cantilevered work platform, adapted to support a formwork panel, comprising a location module as presented above.

Claims (6)

Cantilevered work platform configured to be fixed to a vertical wall and adapted to support a formwork panel (B), the cantilevered work platform comprising at least one satellite geolocation beacon (41) so as to determine a position ( P) of the cantilevered work platform. Cantilever work platform according to claim 1, wherein the satellite geolocation beacon (41) has an accuracy of less than 2 meters, preferably 1 meter. Cantilever work platform according to one of Claims 1 and 2, comprising at least one wireless communication device (42) configured to transmit the position (P) to a computer (5) via a communication network. Cantilever work platform according to claim 3, comprising a location module (4) comprising the geolocation beacon (41) and the communication device (42). Cantilever work platform according to claim 4, in which the location module (4) comprises a source of electrical energy (43) for autonomously powering the satellite geolocation beacon (41) and/or the communication device (42). Method for checking a layout plan (Pc) of a plurality of cantilevered work platforms according to one of Claims 1 to 5, each cantilevered work platform being connected to a communication network, the layout plan (pc) associating an identifier of each cantilever work platform (ID) with a theoretical position (Pth), the control process includes:

• a transmission step, by each cantilevered work platform, of a position to a computer (5) via the communication network
• a step of comparison, by the computer (5), of the position (P) with the theoretical position (Pth) of the layout plan (Pc) so as to define a positioning deviation,
• a step of determining an error if the positioning deviation is greater than a predetermined threshold.