Minimizing scour around bridge pile using holes

Elnikhely, E.A.

doi:10.1016/j.asej.2016.06.016

Cited by 11 publications

(4 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…В зарубежных работах имеются примеры использования нечетких множеств и нечеткой логики для моделирования отдельных видов работы свай [48][49][50][51].…”

Section: расчет надежности свай по критериям прочности материала сваиunclassified

Development of improved models for pile load bearing capacity, settlement and reliability analysis

Сергеевич

Александрович

2020

Vestnik MGSU

View full text Add to dashboard Cite

Introduction. Safety of operation and durability of pile foundations and structures as a whole depend on the values of load bearing capacity of piles and reliability in the foundation soils. The key problem of pile analysis consists in reliable determination of its load bearing capacity values according to all performance criteria of the first and second groups of limit states, in revealing of reliable values of reliability (operation safety), economic efficiency and profitability. Materials and methods. One of the difficulties in detecting the value of the load bearing capacity of friction piles is to determine the values of friction and cohesive forces and their distribution over the side surface of the pile in the foundation soil when the loaded pile is immobilized (at rest). Results. Absence of reliable information on actual friction and cohesive force and, consequently, on actual load bearing capacity of a pile in the conditions of immobility does not allow to estimate its quality taking into account assurance of trouble-free operation (reliability) in real operating conditions at the pre-set operating load, it is impossible to predict the durability of a pile, to make a reasonable choice of pile shape and dimensions, etc. Another pile analysis problem is determining the value of pile settlement. The value of pile settlement is in some cases the most important indicator of the facility performance. Conclusions. New approaches to the operation of piles in the foundation soil on the basis of modern methods of reliability calculations with limited statistical information about controlled parameters are proposed. Improvement and development of pile calculation methods can be found in the calculation of deep trencher foundations, in the calculation of open caissons and caissons, the development of new statutory documents on pile foundations; as well as during training process of various universities and as a source for advanced training of specialists.

show abstract

Section: расчет надежности свай по критериям прочности материала сваиunclassified

Development of improved models for pile load bearing capacity, settlement and reliability analysis

Сергеевич

Александрович

2020

Vestnik MGSU

View full text Add to dashboard Cite

show abstract

“…Bridge piers can be protected from scouring by either indirect or direct methods [17]. Indirect methods, such as collars [18], vanes [19], sacrificial piers [20], or self-protected piers with openings within the pier [21], change the flow pattern around the bridge pier and thus reduce the strength of downflow and horseshoe vortex [22]. Direct methods (riprap, geobags, cable-tied blocks or similar launchable material) increase the riverbed resistance in order to withstand the turbulent flow around the piers [23].…”

Section: Introductionmentioning

confidence: 99%

Scour at Bridge Piers Protected by the Riprap Sloping Structure: A Review

Harasti

Gilja

Potočki

et al. 2021

Water

View full text Add to dashboard Cite

Bridge piers on large rivers are often protected from scouring using launchable stone, such as a riprap sloping structure. While such scour countermeasures are effective for pier protection, they significantly alter flow conditions in the bridge opening by overtopping flow and flow contraction, deflecting the formation of the scour hole downstream and exposing the downstream riverbed to additional scour. This paper provides a comprehensive and relevant review of bridge scour estimation methods for piers with a riprap sloping structure installed as a scour countermeasure. Research on empirical methods for bridge scour estimation is reviewed and analyzed with formulae used for comparable structures—complex pier formulae and formulae for river training structures. A summary of relevant formulae applicable to piers with installed scour countermeasures is provided, as well as a discussion on the possible future research directions that could contribute to the field.

show abstract

“…The combination proved to be effective in scour reduction around circular piers. Elnikhely (2017) showed that about 89% reduction in scour depth could be achieved using a combination of a perforated sacrificial pile upstream of the pier with a hole angle of 45°and a pier with a hole angle of 45°.…”

Section: Introductionmentioning

confidence: 99%

Effect of L-shaped slots on scour around a bridge abutment

Saad

Fattouh

Mokhtar

2021

Water Practice and Technology

View full text Add to dashboard Cite

Local scour is the most significant cause of bridge failure. Providing a short abutment with a straight slot has proved to be an effective method for reducing scour at this abutment. In this study, laboratory experiments have been conducted to investigate the effectiveness of using L-shaped slots in comparison to the commonly used straight slot, on the scour reduction at short vertical-wall abutment under clear-water flow conditions and uniform bed materials. The slots were just above the bed and their diameters equal to half the abutment's length. The results illustrated that it is essential to have a straight slot in any combination of slots, as any configuration without one is inefficient. Also, a combination of a straight slot with one side slot in the middle of the abutment's width gives better performance than an individual straight slot, as it reduces the depth, area, and volume of the scour hole by about 32.6, 26.8, and 43.6% respectively, in comparison to 23.2, 20.7, and 35.3% for the straight slot alone.

show abstract

Minimizing scour around bridge pile using holes

Cited by 11 publications

References 16 publications

Development of improved models for pile load bearing capacity, settlement and reliability analysis

Development of improved models for pile load bearing capacity, settlement and reliability analysis

Scour at Bridge Piers Protected by the Riprap Sloping Structure: A Review

Effect of L-shaped slots on scour around a bridge abutment

Contact Info

Product

Resources

About