COMPARAÇÃO DE PERIGOS E RISCOS DE SST NA REABILITAÇÃO DE CONDUTAS DE DRENAGEM DE ÁGUAS RESIDUAIS UTILIZANDO TÉCNICAS COM ABERTURA DE VALA E SEM ABERTURA DE VALA

Introduction: The rehabilitation of wastewater drainage collectors is a key activity to guarantee the operability of the systems and mitigate anomalies that may affect network users and the environmental impacts that may arise. Drainage network maintenance activities are associated with several occupational health and safety (OSH) risks for workers who perform them, depending on the rehabilitation techniques used. Materials and methods: The present work compares the risks to OSH associated with the rehabilitation of wastewater collectors using the traditional method of replacing the damaged collector, with trench opening, and the Cured In Place Pipe (CIPP) rehabilitation method, without need to open a trench. The research involved the identification of collector rehabilitation methodologies and monitoring of work on site. Results and discussion: From the results of the study, the difference in execution time for rehabilitation works stands out, with the method without trench opening being incomparably faster than traditional methodologies with trench opening and reducing the impact on road users public. This reduction in execution times translates into a very significant reduction in the time workers are exposed to risk factors.