Improving the geometry of manholes designed for separate sewer systems

Abbas, Alaa; Ruddock, Felicite; Alkhaddar, Rafid; Rothwell, Glynn; Andoh, Robert

doi:10.1139/cjce-2018-0057

Cited by 10 publications

(4 citation statements)

References 14 publications

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“…Step 2. e distribution density of grey correlation entropy was obtained according to equation (7). Let R i � ξ[x 0 (k), x i (k)] , and the defined distribution density of grey correlation entropy is as follows:…”

Section: Grey Correlation Entropy Methods Tomentioning

confidence: 99%

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Damage Evaluation of the Paving around Manholes under Vehicle Dynamic Load

Zhao

Liu

et al. 2020

Advances in Materials Science and Engineering

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It is very important for pavement engineers to know which factors are the main reasons for the damage of the paving around manholes. Based on the investigation on the damage of paving around manholes, a vibration model with multidegree of freedom for the vehicle-manhole cover was established and analyzed. After that, the Matlab software was used to obtain the variation law of impact load over time, and the 95% fourth power of the aggregate force was used as the index to evaluate the pavement damage. Finally, many influencing factors on pavement damage were analyzed by the method of grey correlation entropy. The results indicated that the impact load reached the maximum for the first time when the vehicle reached the top of the manhole cover, which was 1.29 times that of the static load, and the pavement damage coefficient was 2.12 times that of the static load. The influencing factors had different degrees of influence on the pavement damage; from large to small, they were change of road longitudinal slope > driving speed > damping of tire > stiffness of tire > height difference from the pavement damage > height difference from the manhole settlement > stiffness of the manhole cover.

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Section: Grey Correlation Entropy Methods Tomentioning

confidence: 99%

“…At present, research on manholes and the paving around manholes mostly focuses on manhole settlement mechanisms [6], new manhole structures [7][8][9], damage analysis of the paving around manholes [10], and treatment technology for pavement damage [11,12], and the control of damage to paving around manholes has improved to some extent.…”

Section: Introductionmentioning

confidence: 99%

Damage Evaluation of the Paving around Manholes under Vehicle Dynamic Load

Zhao

Liu

et al. 2020

Advances in Materials Science and Engineering

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“…The new manhole is cylindrical and has two chambers: the inner chamber is used as the conventional sanitary manhole, the external only used for storm water flow (Abbas et al, 2018). The level of the storm chamber is shallower than the sanitary chamber, the range of depth for both chambers changing according to the level of the inlet/outlet sanitary pipe for the inner chamber and the storm pipe for the outer chamber.…”

Section: The New Manhole Designmentioning

confidence: 99%

The hydraulic performance of the storm chamber in a new manhole designed for separate sewer systems

Abbas

Carnacina

Ruddock

et al. 2020

Journal of Hydraulic Research

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Hydraulic models < Instrumentation, measurements and experimental methods, Flow visualization and imaging < Instrumentation, measurements and experimental methods, Flow-structure interactions < Applied fluid mechanics and hydraulic engineering, Sewer hydraulics < Applied fluid mechanics and hydraulic engineering, Dispersion processes and models < Environmental Fluid Mechanics Note: The following files were submitted by the author for peer review, but cannot be converted to PDF. You must view these files (e.g. movies) online.Full flow 4ls-1-Conventional amnhole.MOV βip over 0.5 -Flow of New Manhole.MOV βip over 0.85 -Flow of New Manhole.MOV βip over 1 -Flow of New Manhole.MOV

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“…Simulations showed the case where the cover protruded above the road surface as the most critical. Recent studies on manhole covers included driving comfort evaluation for manhole covers and the pavement around manholes [7], composite materials for manhole covers [8], the automated detection of manhole covers with mobile laser scanning systems [9], and the improvement of the geometry of manholes to withstand high loads [10].…”

Section: Introductionmentioning

confidence: 99%

Influence of Operating Conditions on a Cast-Iron Manhole Cover

et al. 2022

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Manhole covers must provide adequate strength and durability over the intended service life. In addition to operating loads, the lifespan of cast-iron manhole covers is strongly influenced by the conditions of installation and cover placement after opening or closing. These can include a vertical displacement from the plane of the carriageway during installation or the settlement of the terrain around the cover afterwards. After opening and closing the cover, the lid often only partially touches the support surface due to stones or other impurities caught on the surface or under the cover. These events can significantly affect the lifespan of the cover. In this study, an improved geometry of the cast-iron cover is proposed and analysed from an operational strength point of view. Initially, the geometry and potential critical points were scrutinized, and typical loads on the cover were determined. A numerical model was then set to simulate the behaviour during typical operation. In the simulations, the impact of the critical scenarios was analysed by dividing the impact parameters into individual levels. The simulation results reveal the suitability of the improved cover geometry.

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Improving the geometry of manholes designed for separate sewer systems

Abstract: The version presented here may differ from the published version or from the version of the record. Please see the repository URL above for details on accessing the published version and note that access may require a subscription.

Cited by 10 publications

References 14 publications

Damage Evaluation of the Paving around Manholes under Vehicle Dynamic Load

Damage Evaluation of the Paving around Manholes under Vehicle Dynamic Load

The hydraulic performance of the storm chamber in a new manhole designed for separate sewer systems

Influence of Operating Conditions on a Cast-Iron Manhole Cover

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