A pioneer in the use of BIM technology in the country, Sondotécnica innovates once again with the BIM project in Favela. The methodology uses the collaborative environment provided by the information modeling for projects in communities where the mapping of spaces demands a differentiated approach, mainly due to the absence of official information about these regions and the difficulties of access. BIM in Favela was designed for management and inspection contracts for urbanization projects and works and can be applied in several regions, since more than 1,800 km² of Brazilian urban areas are occupied by slums.

The mapping of these areas starts with overflights made with drones and support points on the ground. From this work, it is possible to generate an orthomosaic – a set of high quality photos -, a point cloud, an aerophotogrammetric restitution and a 3D model of the entire area.

“In general, favelas are not mapped. We noticed that these spaces are often blank on city maps. There are no official street names and therefore people do not have an address and this is very relevant. Imagine going to a job interview, for example, and not being able to fill in your address on a form or resume. With this new way of acting, we help to improve the housing of these people, providing more dignity, a sense of belonging and identity”, emphasizes the manager of BIM and Innovation at Sondotécnica, Stefania Dimitrov.

The high population density and disorderly construction are characteristics common to most favelas and give a particular complexity to these regions, which is taken into account in BIM in Favela. “The main objective of this methodology is to improve the housing of the residents of these communities. We see people inhabiting areas of stream and risk, without sanitary sewage, adequate water supply, lighting and free spaces for leisure. The technology embedded in BIM in Favela helps us to better understand the needs of those who live there and even make adjustments throughout the work due to this more complete mapping”, reinforces Stefania.

The tool also includes useful information for management and planning

Another important gain is the possibility of performing simulations on, for example, the best escape route in the event of a risky situation such as a fire, how to deal with unforeseen and emergency situations and propose and predict improvements. In addition to geometric information, BIM in Favela also counts, within the models, with information such as how many families live in each building, if a particular building is at risk, if it needs to be removed, when this will happen, which phases of the work will be, among many other data.

During the mapping, Sondotécnica had the support of Construtivo, an Information Technology company that offers solutions for the engineering sector. One of the tools tested by the field team was the Leica BLK To Go scanner, which provides more complete information about the environment from a cloud of points generated by the capture of images, facilitating the report for the evaluation of housing. Professionals also experimented with the Leica Disto D2 laser gauge, a feature that connects directly to the tablet and helps in calculating and recognizing works already carried out on site, eliminating the need for staff to return to the offices to create project plans based on manual calculations.

Project will be presented at industry events

The case of the BIM project in Favela will be presented at two important events in the construction sector in the coming months. On December 1st, Stefania and MIT researcher Fabio Duarte will head a panel on the topic at the 5th International Seminar The BIM Era, promoted by the Architecture and Engineering Union (SINAENCO). From December 7th to 8th, the Sondotécnica team and professionals from Pars and Autodesk will participate in Autodesk Experience Brazil, the largest virtual event held by Autodesk in Brazil, talking about the methodology.

“BIM allows for the inclusion of management and planning information that becomes associated with the geometry of the favela, offering a much more complete view of the enterprise. This brings us the possibility of more transparent and assertive conversations with all the agents involved, such as residents, who are able to better understand through a model the interventions that need to be made, and also with construction companies, designers, financing and approval bodies involved. . BIM is very rich as a communication material throughout the entire project cycle”, explains Stefania.