Effect of Angle between Pier and Center of River Flow on Local Scouring around the Bridge Pier

Water ◽

10.3390/w12113192 ◽

2020 ◽

Vol 12 (11) ◽

pp. 3192

Author(s):

Takuma Kadono ◽

Shinichiro Okazaki ◽

Yoshihiro Kabeyama ◽

Toshinori Matsui

Keyword(s):

Water Flow ◽

Heavy Rainfall ◽

River Flow ◽

Bridge Pier ◽

Bridge Piers ◽

Flowing Water ◽

River Flows ◽

Scouring Depth

In recent years, heavy rainfall disasters have caused frequent damage to bridge piers due to scouring and have resulted in the fall of bridges in many areas in Japan. The objective of this study was to investigate the effect of local scouring around the downstream of the piers on the local scouring around the center of the river flowing at an angle to the piers. It was found that when the center of the river flows at an angle to the piers, the scouring area becomes wider from the upstream to the downstream of the piers because of the longer inhibition width of the piers positioned perpendicular to the water flow. The downstream scouring depth tends to be smaller than the upstream scouring depth. In addition, the time to the onset of tilting deformation of the piers increases with the inhibition width of the piers positioned perpendicular to the flowing water.

Download Full-text

A Study on Interaction between Overfall Types and Scour at Bridge Piers with a Moving-Bed Experiment

Water ◽

10.3390/w13020152 ◽

2021 ◽

Vol 13 (2) ◽

pp. 152

Author(s):

Wei-Lin Lee ◽

Chih-Wei Lu ◽

Chin-Kun Huang

Keyword(s):

Large Scale ◽

River Flow ◽

Extreme Event ◽

Bridge Pier ◽

Bridge Piers ◽

Flow Conditions ◽

Moving Bed ◽

Directional Flow ◽

Scour Hole ◽

Additional Protection

River slopes can be changed due to an extreme event, e.g., a large-scale earthquake. This can uplift a riverbed greatly and thereby change the behavior of the river flow into a free or submerged overfall. Corresponding damage, including extreme erosion, on bridge piers located in the river can take place due to the aforementioned flow conditions. A reconstructed bridge pier in the same location would also experience a similar impact if the flow condition is not changed. It is important to identify these phenomena and research the mechanism in the interaction between overfall types and scour at bridge piers. Therefore, this paper is aimed at studying a mechanism of free and submerged overfall flow impacts on bridge piers with different distances by a series of moving-bed experiments. The experiment results showed clearly that bridge pier protection requires attention particularly when the pier is located in the maximum scour hole induced by the submerged overfall due to the z directional flow eddies. In many other cases, such as when the location of the bridge pier was at the upstream slope of a scour hole induced by a flow drop, a deposition mound could be observed at the back of the pier. This indicates that, while a pier is at this location, an additional protection takes place on the bridge pier.

Download Full-text

3713 Estimation of River Flow State and Stability of Bridge Pier Using Time Series Analysis of Vibration

The proceedings of the JSME annual meeting ◽

10.1299/jsmemecjo.2006.7.0_53 ◽

2006 ◽

Vol 2006.7 (0) ◽

pp. 53-54

Author(s):

Dong-Yeul SONG ◽

Kensaku MATSUMOTO ◽

Haruo TAMAKI

Keyword(s):

Time Series ◽

Time Series Analysis ◽

River Flow ◽

Bridge Pier ◽

Flow State ◽

Series Analysis

Download Full-text

Bridge pier scour hazards assessment using smart-spheres

10.5194/egusphere-egu2020-8341 ◽

2020 ◽

Author(s):

Alex Corrigan ◽

Hassan Elmubarak ◽

Yi Xu ◽

Panagiotis Michalis ◽

Manousos Valyrakis

Keyword(s):

Sediment Transport ◽

Turbulent Flows ◽

River Flow ◽

Fuzzy Inference ◽

Weather Conditions ◽

Bridge Pier ◽

Bridge Scour ◽

Pier Scour ◽

International Conference ◽

Bridge Pier Scour

Under climate change, shifting &#160;weather conditions, (both in terms of increasing frequency and intensifying magnitude) result in increasing occurrence of catastrophic failures of the constantly exposed and ageing infrastructure, across the world. Energetic flow events, advected past hydraulic infrastructure (such as bridge piers and abutments), may lead to scour [1, 2, 3], which is the primary cause of bridge collapses, resulting in high socio-economical costs, including loss of life.This research aims to demonstrate the use of a novel monitoring device for the assessment of scour initiated by turbulent flows. This is pursued via the use of a miniaturized instrumented particle, namely &#8220;smart-sphere&#8221;, to record directly the frequency of entrainment from its downstream placement a model bridge pier at the Water Engineering lab of the University of Glasgow [4, 5, 6]. The change in entrainment frequencies is used as a metric to assess the increasing risk to scour, with increasing flow conditions, recorded acoustic Doppler velocimetry (ADV). The utility of the method as well as the potential use of the acquired data for prediction of bridge pier scour is presented and the tool as well is discussed with the potential for use to an appropriate field site [7, 8, 9].&#160;AcknowledgmentsThis research project has been supported by Transport Scotland, under the 2019/20 Innovation Fund and the Student research award.&#160;References[1] P&#228;htz, Th., Clark, A., Duran, O., Valyrakis, M. 2019. The physics of sediment transport initiation, cessation and entrainment across aeolian and fluvial environments, Reviews of Gephysics, https://doi.org/10.1029/2019RG000679.[2] Yagci, O., Celik, F., Kitsikoudis, V., Kirca, O., Hodoglu, C., Valyrakis, M., Duran, Z., Kaya S. 2016. Scour patterns around individual vegetation elements, Advances in Water Resources, 97, pp 251-265, doi: 10.1016/j.advwatres.2016.10.002.[3] Michalis, P., Saafi, M. and M.D. Judd. (2012) Integrated Wireless Sensing Technology for Surveillance and Monitoring of Bridge Scour. Proceedings of the 6th International Conference on Scour and Erosion, France, Paris, pp. 395-402.[4] Valyrakis, M. & Pavlovskis, E. 2014. "Smart pebble&#8221; design for environmental monitoring applications, In Proceedings of the 11th International Conference on Hydroinformatics, Hamburg, Germany.[5] Valyrakis M., A. Alexakis. 2016. Development of a &#8220;smart-pebble&#8221; for tracking sediment transport. International Conference on Fluvial Hydraulics River Flow 2016, St. Liouis, MO, 8p.[6] Valyrakis, M., Farhadi, H. 2017. Investigating coarse sediment particles transport using PTV and &#8220;smart-pebbles&#8221; instrumented with inertial sensors, EGU General Assembly 2017, Vienna, Austria, 23-28 April 2017, id. 9980.[7] Valyrakis, M., Diplas, P., Dancey, C.L. 2011. Prediction of coarse particle movement with adaptive neuro-fuzzy inference systems, Hydrological Processes, 25 (22). pp. 3513-3524. ISSN 0885-6087, doi:10.1002/hyp.8228.[8] Valyrakis, M., Michalis, P., Zhang, H. 2015a. A new system for bridge scour monitoring and prediction. Proceedings of the 36th IAHR World Congress, The Hague, the Netherlands, pp. 1-4.

Download Full-text

ECOLOGY AND SUSTAINABLE DEVELOPMENT IN LOCAL BUSINESS:SIMULATION OF LOW IMPACT DEVELOPMENT IN SURAKARTA REGENCY

eBA Journal: Journal Economics, Bussines and Accounting ◽

10.32492/eba.v4i1.542 ◽

2018 ◽

Vol 4 (1) ◽

pp. 32-38

Author(s):

Bhimo Rizky Samudro ◽

Yogi Pasca Pratama

Keyword(s):

Water Resources ◽

Water Resources Management ◽

River Flow ◽

Low Impact Development ◽

Development Model ◽

Business Activity ◽

Resources Management ◽

Central Java ◽

Specific Culture ◽

Central Java Province

This paper will describe the function of water resources to support business activities in Surakarta regency, Central Java province. Surakarta is a business city in Central Java province with small business enterprises and specific culture. This city has a famous river with the name is Bengawan Solo. Bengawan Solo is a River Flow Regional (RFR) to support business activities in Surakarta regency. Concious with the function, societies and local government in Surakarta must to manage the sustainability of River Flow Regional (RFR) Bengawan Solo. It is important to manage the sustainability of business activity in Surakarta regency. According to the condition in Surakarta regency, this paper will explain how the simulation of Low Impact Development Model in Surakarta regency. Low Impact Development is a model that can manage and evaluate sustainability of water resources in River Flow Regional (RFR). Low Impact Development can analys goals, structures, and process water resources management. The system can also evaluate results and impacts of water resources management. From this study, we hope that Low Impact Development can manage water resources in River Flow Regional (RFR) Bengawan Solo.

Download Full-text

Perencanaan Sistem Pengurangan Sampah Permukiman Bantaran Sungai Cidurian Kota Bandung

Jurnal Serambi Engineering ◽

10.32672/jse.v4i2.1466 ◽

2019 ◽

Vol 4 (2) ◽

Author(s):

Raka Maulana ◽

Yulianti Pratama ◽

Lina Apriyanti

Keyword(s):

Waste Management ◽

River Basin ◽

River Flow ◽

Waste Reduction ◽

Residential Areas ◽

Community Based ◽

Inorganic Waste ◽

Waste Bank ◽

The City

Some areas in the city of Bandung is an area that dilitasi by the flow of the river, to prevent the introduction of garbage into the river basin is necessary to note the waste management systems in residential areas along the river. Cidurian river has a length of 24.86 Km along the river flow. Consists of the city of Bandung and Bandung regency. Administrative regions Cidurian River past eight (8) districts, from the region in the District Kiaracondong precisely Village Babakan Babakan Sari and Surabaya populous and the most densely populated. Thus, there should be community-based waste management in the form of a reduction in resources to prevent potential entry of waste into the river basin. Planning waste reduction will be divided into two, namely the reduction of inorganic waste with waste bank then the reduction of organic waste with absorption holes biopori, and bio reactor mini determination of the reduction is determined by the results of the analysis of the sampling covers the composition and garbage, then the result of the measurement characteristics test and analysis results questionnaire.

Download Full-text