Investigation of Manhole Cover Displacement during Rapid Filling of Stormwater Systems
Publication: Journal of Hydraulic Engineering
Volume 146, Issue 4
Abstract
Stormwater systems are subject to operational issues while undergoing rapid filling during intense rain events. In various instances, air–water interactions take place, and it is possible that the air located in the headspace of manholes will be pressurized. Air pressurization can be created by rapid changes in water free surface within vertical shafts in conditions in which the manhole headspace is insufficiently ventilated. Existing research has indicated that rapid changes in the free surface can be triggered by inertial oscillations/surging and by the release of entrapped air pockets through water-filled shafts. Air pressurization or direct water impact can lead to the displacement of manhole covers, with obvious impacts to the safety of pedestrian and vehicular traffic. However, investigation of this topic has been limited, mostly focusing on conditions in which water level changes result from the sudden filling of vertical shafts. This work presents a numerical investigation using OpenFOAM describing pressures on manhole covers under varying ventilation conditions in shafts undergoing inertial oscillations or sudden release of air pockets. Among tested conditions, pressures associated with the sudden release of air pockets had greater potential to create pressures that lead to manhole cover displacement. It is expected that results from this work can help mitigate such hazardous conditions associated with the rapid filling of stormwater systems.
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References
Baines, W. D. 1991. “Air cavities as gravity currents on slope.” J. Hydraul. Eng. 117 (12): 1600–1615. https://doi.org/10.1061/(ASCE)0733-9429(1991)117:12(1600).
Catano-Lopera, Y., T. Tokyay, J. Martin, A. Schmidt, R. Lanyon, K. Fitzpatrick, C. Scalise, and M. Garcia. 2014. “Modeling of a transient event in the tunnel and reservoir plan system in Chicago, Illinois.” J. Hydraul. Eng. 140 (9): 05014005. https://doi.org/10.1061/(ASCE)HY.1943-7900.0000888.
Chan, S. N., J. Cong, and J. H. W. Lee. 2017. “3D numerical modeling of geyser formation by release of entrapped air from horizontal pipe into vertical shaft.” J. Hydraul. Eng. 143 (9): 04017039. https://doi.org/10.1061/(ASCE)HY.1943-7900.0001416.
Choi, Y., A. S. Leon, and S. V. Apte. 2014. “Three-dimensional numerical modeling of air-water geyser flows.” In Proc., 2014 ASCE World EWRI Congress. Reston, VA: ASCE.
Chosie, C. D., T. M. Hatcher, and J. G. Vasconcelos. 2014. “Experimental and numerical investigation on the motion of discrete air pockets in pressurized water flows.” J. Hydraul. Eng. 143 (9): 04017039. https://doi.org/10.1061/(ASCE)HY.1943-7900.0000898.
Cong, J., S. N. Chan, and J. H. W. Lee. 2017. “Geyser formation by release of entrapped air from horizontal pipe into vertical shaft.” J. Hydraul. Eng. 143 (9): 04017039. https://doi.org/10.1061/(ASCE)HY.1943-7900.0001332.
Crimaldi, L., and N. Ramos. 2016. “Answers sought in manhole cover fatality on expressway.” Accessed June 22, 2017. https://www.bostonglobe.com/2016/02/12/woman-struck-flying-manhole-cover-inside-neill-tunnel-suffers-fatal-injuries/Okpvg6Jx6VF86xsYrA2ZRN/story.html.
Ferziger, J. H., and M. Peric. 2002. Computational methods for fluid mechanics. 3rd ed. Berlin: Springer.
Fourie, C. 2015. “Dislodged manhole cover causes accident.” Accessed April 18, 2017. https://krugersdorpnews.co.za/266173/dislodged-manhole-cover-causes-accident/.
Fox News. 2016. “‘Dancing’ manhole cover takes internet by storm.” Accessed June 18, 2018. https://video.foxnews.com/v/5072496106001#sp=show-clips.
Guo, Q., and C. S. S. Song. 1991. “Dropshaft hydrodynamics under transient conditions.” J. Hydraul. Eng. 117 (8): 1042–1055. https://doi.org/10.1061/(ASCE)0733-9429(1991)117:8(1042).
Holmes, S. 2017. “‘It could have killed her’: Manhole cover explodes and rockets 12ft in the air landing just a metre from where a woman was standing during flash floods in Gloucester city centre.” Accessed June 18, 2018. https://www.dailymail.co.uk/news/article-4731532/Manhole-cover-explodes-rockets-12ft-air-cfamily.html.
Klaver, P., D. Collins, K. Robinson, and S. Bell. 2016. “Modeling of transient pneumatic events in a combined sewer overflow storage tunnel system.” J. Water Manage. Model. 24. https://doi.org/10.14796/JWMM.C409.
Leon, A. S. 2016. “New evidence on the causes of explosive geysers in stormwater and combined sewer systems: A simplified model for the prediction of these geysers.” In Proc., 2016 ASCE World EWRI Congress. Reston, VA: ASCE.
Liu, F. 2016. “A thorough description of how wall functions are implemented in OpenFOAM.” In Proc., CFD with OpenSource Software, edited by H. Nilsson. Gothenburg, Sweden: Chalmers Univ. of Technology.
Lo, T. 2018. “Spooky moment a manhole cover appears to dance in heavy rain on a Chinese street.” Accessed June 18, 2018. https://www.longroom.com/discussion/1054301/spooky-moment-a-manhole-cover-appears-to-dance-in-heavy-rain-on-a-chinese-street.
Martin, C. S. 1976. “Entrapped air in pipelines.” In Vol. 2 of Proc., 2nd Int. Conf. on Pressure Surges, 15–27. Bedford, UK: British Hydromechanics Research Association.
Metcalfe, J. 2012. “The hidden dangers of driving over manholes: Watch cars get launched into the air like rockets due to ill-fitting manhole covers.” Accessed June 22, 2017. https://www.citylab.com/transportation/2012/07/hidden-dangers-driving-over-manholes/2713/.
Muller, K. Z., J. Wang, and J. G. Vasconcelos. 2017. “Water displacement in shafts and geysering created by uncontrolled air pocket releases.” J. Hydraul. Eng. 143 (10): 04017043. https://doi.org/10.1061/(ASCE)HY.1943-7900.0001362.
OpenFOAM Foundation. 2016. OpenFOAM user guide, version 4.0. Reading, UK: CFD Direct.
Parmakian, J. 1963. Waterhammer analysis. New York: Dover.
Shao, Z. S., and S. A. Yost. 2018. “Numerical investigation of driving forces in a geyser event using a dynamic multi-phase Navier–Stokes model.” Eng. Appl. Comput. Fluid Mech. 12 (1): 493–505. https://doi.org/10.1080/19942060.2018.1459322.
Svenungsson, J. 2016. Solving electric field using Maxwell’s equations and compressibleInterFOAM solver. Gothenburg, Sweden: Chalmers Univ. of Technology.
Vasconcelos, J. G., and S. J. Wright. 2011. “Geysering generated by large air pockets released through water-filled ventilation shafts.” J. Hydraul. Eng. 137 (5): 543–555. https://doi.org/10.1061/(ASCE)HY.1943-7900.0000332.
Wang, J., and J. G. Vasconcelos. 2018. “Manhole cover displacement caused by the release of entrapped air pockets.” J. Water Manage. Model. 26: C444. https://doi.org/10.14796/JWMM.C444.
Zhou, F., F. E. Hicks, and P. M. Steffler. 2002. “Transient flow in a rapidly filling horizontal pipe containing trapped air.” J. Hydraul. Eng. 128 (6): 625–634. https://doi.org/10.1061/(ASCE)0733-9429(2002)128:6(625).
Zhou, F., F. E. Hicks, and P. M. Steffler. 2004. “Analysis of effects of air pocket on hydraulic failure of urban drainage infrastructure.” Can. J. Civ. Eng. 31 (1): 86–94. https://doi.org/10.1139/l03-077.
Zhou, L., D. Liu, and B. Karney. 2013. “Investigation of hydraulic transients of two entrapped air pockets in a water pipeline.” J. Hydraul. Eng. 139 (9): 949–959. https://doi.org/10.1061/(ASCE)HY.1943-7900.0000750.
Zhou, L., D. Liu, and C. Ou. 2011. “Simulation of flow transients in a water filling pipe containing entrapped air pocket with VOF model.” Eng. Appl. Comput. Fluid Mech. 5 (1): 127–140. https://doi.org/10.1080/19942060.2011.11015357.
Zhou, L., H. Wang, B. Karney, and D. Liu. 2018. “Dynamic behavior of entrapped air pocket in a water filling pipeline.” J. Hydraul. Eng. 144 (8): 04018045. https://doi.org/10.1061/(ASCE)HY.1943-7900.0001491.
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Published In
Journal of Hydraulic Engineering
Volume 146 • Issue 4 • April 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: Jun 21, 2018
Accepted: Sep 30, 2019
Published online: Feb 12, 2020
Published in print: Apr 1, 2020
Discussion open until: Jul 12, 2020
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