Scientific Journal Problems of Emergency Situations — K. Ostapov, Y. Senchykhyn, V. Avetisian, Y. Haponenko, I. Kirichenko. Increasing the effectiveness of extinguishing fires in the undercarriage of the subway with gel-forming compounds. С. 267-280.

The effectiveness of extinguishing fires in the undercarriage space of cars at subway stations has been increased due to the use of a special trolley for supplying gel-forming compounds to hard-to-reach places under subway cars. In order to ensure the delivery of the gelling system to hard-to-reach places under the subway cars, it is proposed to use a special cart that moves inside the main track of the subway in the deepened tray of the water collector, thanks to a cable winch on the «pull-push» principle with an autonomous electric reversing drive. To confirm the effectiveness of extinguishing, on a special stand that allowed changing the position of the model hearth in space, to the position of the conventional ceiling-floor, comparative experiments were conducted for three types of the most common fire extinguishing agents, with the determination of the average values of the time and consumption of fire extinguishing agents for fire extinguishing, with at different angles of inclination of their submission. It is recognized that the use of gel-forming compounds when extinguishing equipment elements in the undercarriage space helps to reduce extinguishing costs and allows to extinguish the fire under the car 2,5 times faster. It was established that the change in the angle of inclination of the burning surface significantly affects the effectiveness of extinguishing with water and fire-extinguishing powder. The obtained data confirm the expediency of creating special carts for undercarriage extinguishing using fire-extinguishing gelling compounds. The obtained results are useful and im-portant, as they confirm the increase in the effectiveness of extinguishing the weighted space with gel-forming compositions, reflect a reduction in times of time and consumption of fire extinguishing agent when using gel-forming compositions. The use of a special weighted extinguishing cart with gel-forming compositions allows automated remote extinguishing in hard-to-reach places of the weighted space, which significantly increases the safety of rescuers when extinguishing such fires.

References

Long, Z., Zhong, M., Chen, J., Cheng, H. (2023). Study on emergency ventilation strategies for various fire scenarios in a double-island subway station. Journal of Wind Engineering and Industrial Aerodynamics, 235, 105364. doi: 10.1016/j.jweia.2023.105364
Wang, K., Cai, W., Zhang, Y., Hao, H., Wang, Z. (2021). Numerical simulation of fire smoke control methods in subway stations and collaborative control system for emergency rescue. Process Safety and Environmental Protection, 147, 146–161. doi: 10.1016/j.psep.2020.09.033
Wei, Z., Xi, Z., Zhuo-fu, W. (2016). Experiment study of performances of fire detection and fire extinguishing systems in a subway train. Procedia Engineering, 135, 393–402. doi:1016/j.proeng.2016.01.147
Saveliev, D., Khrystych, O., Kirieiev, O. (2018). Binary fire-extinguishing systems with separate application as the most relevant systems of forest fire suppression. European journal of technical and natural science, 1, 31–36. Available at: http://repositsc.nuczu.edu.ua/handle/123456789/7121
Ostapov, K., Senchihin, Yu., Syrovoy, V. (2017). Development of the installation for the binary feed of gelling formulations to extinguishing facilities. Science and education a new dimension. Natural and technical sciences, 132, 75–77. Available at: http://repositsc.nuczu.edu.ua/handle/123456789/3891
Ng, Y., Chow, W., Cheng, C., Chow, C. (2019). Scale modeling study on flame colour in a ventilation-limited train car pool fire. Tunnelling and underground space technology, 85, 375–391. doi: 1016/j.tust.2018.12.026
Dale, L. (2018). Ambulatory surgery center safety guidebook. Managing code requirements for fire and life safety, 15, 23–26. doi: 1016/B978-0-12-849889-7.00005-4
Gravit, M. Vaititckii, A. Shpakova, A. (2016). Subway constructions fire safety regulatory. Requirements procedia engineering, 165, 1667–1672. doi: 1016/j.proeng.2016.11.908
Zhanga, L., Wua, X., Liub, M., Liuc, W., Ashuri, B. (2019). Discovering worst fire scenarios in subway stations: A simulation approach. Automation in construction, 99, 183–196. doi: 1016/j.autcon.2018.12.007
De-xu, D., Xu–hai, P., Min, H. (2018). Experimental study on fire extinguishing properties of compound superfine powder. Procedia engineering, 142–148. doi: 1016/j.proeng.2017.12.126
Ostapov, K et al. (2021). Improving the installation of fire gasing with gelelating compounds. Problems of emergency situations, 33, 4–14. Available at: http://repositsc.nuczu.edu.ua/handle/123456789/14116
Chernukha, A. et al. (2019). Mathematical modeling of fire-proof efficiency of coatings based on silicate composition. Materials science forum, 1006, 70–75. doi: 10.4028/www.scientific.net/MSF.1006.70
Pietukhov, R., Kireev, A., Slepuzhnikov, E., Chyrkina, M., Savchenko, A (2020). Lifetime research of rapid-hardening foams. Problems of emergency situations, 31, 226–233. Available at: http://repositsc.nuczu.edu.ua/handle/123456789/11675.
Ostapov, K., Kirichenko, I., Senchykhyn, Y. (2019). Improvement of the installation with an extended barrel of cranked type used for fire extinguishing by gel-forming compositions. Eastern-European Journal of Enterprise Technologies, 4(10(100)), 30–36. doi: 10.15587/1729-4061.2019.174592