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All Journal Jurnal IPTEK Civil Engineering Dimension Journal of Applied Sciences, Management and Engineering Technology (JASMET) Jurnal Teknologi dan Manajemen Journal of Civil Engineering, Planning, and Design (JCEPD)
Aisyah Dwi Puspasari
Institut Teknologi Adhi Tama Surabaya
Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Axial Bearing Capacity Analysis of Pile Foundation using Nakazawa Method Lestari, Laras Laila; Propika, Jaka; Puspasari, Aisyah Dwi
Jurnal IPTEK Vol 24, No 1 (2020): May
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2020.v24i1.900

Abstract

Pile foundation serves to distribute all the loads in the building to the ground. There are several calculation methods for bearing capacity of pile foundation, one of them is Nakazawa method. Nakazawa method adapted from calculation used in Japan where it is relevant for soft soils. The aim of this research is to obtain axial bearing capacity of pile foundation that can withstand axial forces using Nakazawa method. The parameter that used for the calculation is modified or average N-value (). The analysis result shows the  value is smaller than N existing, indicate that Nakazawa tend to use weaker value of N blows. It means the calculation is considered softer type of soils than the existing ones.The value of point bearing capacity, Rp, assimilate to the pattern of N-SPT. The result value of friction bearing, Rf, in respect of depth shows the linear trending. Rf along the pile depends on the friction interaction between soil and structure. This phenomena influenced by the soil type. The value of cohession along the pile augment, means the ability of soils to stick to the pile/structure is also high. It explains why the value of friction bearing is bigger in respect of depth.
Axial Bearing Capacity Analysis of Pile Foundation using Nakazawa Method Laras Laila Lestari; Jaka Propika; Aisyah Dwi Puspasari
Jurnal IPTEK Vol 24, No 1 (2020)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2020.v24i1.900

Abstract

Pile foundation serves to distribute all the loads in the building to the ground. There are several calculation methods for bearing capacity of pile foundation, one of them is Nakazawa method. Nakazawa method adapted from calculation used in Japan where it is relevant for soft soils. The aim of this research is to obtain axial bearing capacity of pile foundation that can withstand axial forces using Nakazawa method. The parameter that used for the calculation is modified or average N-value (). The analysis result shows the  value is smaller than N existing, indicate that Nakazawa tend to use weaker value of N blows. It means the calculation is considered softer type of soils than the existing ones.The value of point bearing capacity, Rp, assimilate to the pattern of N-SPT. The result value of friction bearing, Rf, in respect of depth shows the linear trending. Rf along the pile depends on the friction interaction between soil and structure. This phenomena influenced by the soil type. The value of cohession along the pile augment, means the ability of soils to stick to the pile/structure is also high. It explains why the value of friction bearing is bigger in respect of depth.
Investigation of Corrosion Resistance of Reinforced Concrete Structures with Varying Supplementary Cementitious Materials in Marine Infrastructure Puspasari, Aisyah Dwi; Komara, Indra; Setyawan, Hendry; Susilo, Tri
Journal of Applied Sciences, Management and Engineering Technology Vol 5, No 1 (2024)
Publisher : Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jasmet.2024.v5i1.6183

Abstract

The degradation of concrete strength may occur due to extreme environmental factors such as sea or coastal areas. Those factors can decrease the durability level of concrete structure signified by the corrosion of reinforced concrete structure. The use of fly ash as a concrete mixture is expected to minimize corrosion in concrete structures. Since fly ash has small particles, it can fill small voids in concrete and minimize corrosive substances. The investigation parameters in this study employed two types of corrosion acceleration test modelling using a 15x15x15cm cube tested object with a concrete quality of 40 MPa. Meanwhile, fly ash involves classes F and C within the level of 20% as well as applied corrosion prediction by 10% and 20%. The addition of fly ash to the concrete mixture can reduce the mass loss of reinforced concrete. The maximum mass loss on a normal test object with a corrosion prediction of 20% was obtained at 18.22%, while a 20% corrosion prediction obtained the smallest value for the SCMFA-C test object at 17.04%. The 20% corrosion prediction obtained the largest distribution of 0.355 mm on the normal test object and the smallest distribution of 0.299 mm occurred on the SCMFA-F test object. Thus, the addition of fly ash to the concrete mixture can reduce the distribution of corrosion and mass loss in reinforced concrete.
A review on the numerical simulation model of scouring around bridge pier by using Flow-3D software Puspasari, Aisyah Dwi; Haw-Tang, Jyh
Journal of Civil Engineering, Planning and Design Vol 3, No 2 (2024): November
Publisher : Faculty of Civil Engeneering and Planning - ITATS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jcepd.2024.v3i2.7300

Abstract

Scouring is one of the important issues that caused damage to the structures. Failure due to local scour has inspired many researchers to study the cause of scouring and to predict the maximum scouring depth around the bridge pier. Numerical simulation is proposed as an effective tool for monitoring the depth of scouring to manage the stability and safety of the bridge. Flow-3D is an accurate, fast, proven CFD software that can solve the toughest free-surface flow problems. However, the guideline information of this software is limited. Scouring classification and mechanism around bridge pier has been discussed briefly. The important things about the Flow-3D model setup are discussed. Verification by comparing the experimental and numerical results is required to determine the best model. Some studies of scouring simulation around bride pier by using Flow-3D software were presented in this paper to prove the accuracy of this software in predicting and simulating the scouring. Zhang's research study is selected as the best numerical model which has the closest result with the experimental result due to the error rate is 0%. This study used the Renormalized group (RNG) model as a turbulence model. For sediment scour model Soulsby-Whitehouse equation and Van Rijn equation are proved as the best model for Critical shields number definition and bed-load transport rate equation. The finer mesh size around the bridge pier was set up to get an accurate result. Specified velocity and outflow are used for the left and right boundaries. Moreover, for front and back boundary were using symmetry, and the bottom and top boundary were using the wall and specified pressure.
Evaluation of Drainage Channel Capacity along Kolonel Sugiono Street, Waru District, Sidoarjo Regency Ramadhan, Muhammad Lucky; Hendrawan, Ilham Mars; Winata, Dyas Ray; Ardhani, Muhammad Zidan; Prayoga, Rahmat Budi; Fabiantoro, Alif Reza; Puspasari, Aisyah Dwi
Journal of Civil Engineering, Planning and Design Vol 4, No 2 (2025): November
Publisher : Faculty of Civil Engeneering and Planning - ITATS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jcepd.2025.v4i2.8631

Abstract

Urban drainage systems in rapidly developing areas often experience reduced performance due to increased surface runoff, resulting in frequent waterlogging. This study evaluates the hydraulic capacity and performance of the existing drainage channel along Kolonel Sugiono Street, Waru District, Sidoarjo Regency, where inundation depths of approximately 15–40 cm are commonly observed during rainfall events. Hydrological analysis was conducted using annual maximum daily rainfall data from the Juanda Meteorological Station for the period 2015–2024. Design rainfall was estimated using the Gumbel extreme value distribution with a 5-year return period and a 90% confidence level, followed by rainfall intensity calculation using the Mononobe method. The design flood discharge was then determined using the Rational Method for a 6.25-ha urban catchment area. Hydraulic analysis employing Manning’s equation was performed to evaluate the capacity of the existing drainage channel based on field-measured dimensions. The results show that the design flood discharge is approximately 1.168 m³/s, while the capacity of the existing channel is only 0.293 m³/s, indicating that the channel is hydraulically inadequate. To address this condition, a channel redesign based on the economic cross-section principle was proposed, resulting in increased channel dimensions and the inclusion of a freeboard. The redesigned channel is capable of conveying a discharge of 1.258 m³/s, exceeding the design requirement. These findings provide a technical basis for improving drainage performance and mitigating flooding in the study area
Urban Drainage Channel Redesign Based on Design Flood Analysis: A Case Study of Gunung Anyar Kidul, Surabaya Erna Dwi Rahayu; Ameylia Fatimah; Nabilla Ayu Januarista; Nur Syiefa Hidayah; Sandy Reza Al Rasyid; Aisyah Dwi Puspasari
Jurnal Teknologi dan Manajemen Vol 7, No 2 (2026): July
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat ITATS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jtm.2026.v7i2.9259

Abstract

Rapid urban development has significantly increased impervious surfaces, resulting in higher surface runoff and frequent urban flooding. Gunung Anyar Kidul, one of the rapidly developing residential areas in Surabaya, has experienced recurring inundation due to inadequate drainage capacity. This study aims to evaluate the hydraulic performance of the existing secondary drainage channel and propose an optimal channel redesign based on the design flood discharge. Hydrological analysis was conducted using the Gumbel distribution to estimate the five-year return period rainfall, while the Rational Method was employed to calculate the design discharge following the Indonesian Standard (SNI 2415:2016). Hydraulic capacity was evaluated using Manning's equation. The results indicate that the five-year design rainfall reached 169.288 mm/day, producing a rainfall intensity of 177.087 mm/h and a design discharge of 7.583 m³/s. The existing channel capacity was only 2.793 m³/s, indicating that the drainage system is hydraulically insufficient. A redesigned trapezoidal channel with a bottom width of 1.80 m and a flow depth of 1.50 m increased the channel capacity to 7.83 m³/s, satisfying both the design discharge and the freeboard requirement specified in SNI 03-3424-1994. The findings demonstrate that channel enlargement combined with routine maintenance can substantially improve drainage performance and reduce urban flood risk in Gunung Anyar Kidul.
Scour Development in Square Pile Groups: Effects of Pile Number and Spacing Aisyah Dwi Puspasari; Jyh-Haw Tang
Civil Engineering Dimension Vol. 28 No. 2 (2026): SEPTEMBER 2026
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/ced.28.2.276-290

Abstract

Local scour around pile group foundations poses a significant risk to hydraulic and coastal structures, particularly when multiple piles interact with complex flow patterns. This study presents a numerical investigation of local scour around pile groups arranged in 2×2, 3×3, and 4×4 square configurations using Flow-3D. The model incorporates clear-water scour conditions, the RNG k–ε turbulence scheme, FAVOR geometry representation, and the Van Rijn sediment transport formulation. Simulations were conducted for three pile spacing ratios (G/D = 2.5, 3, 3.5)  to evaluate the influence of pile number and spacing on scour depth and scour-hole morphology. The results show that scour decreases from  upstream to downstream piles due to sheltering, while central piles experience slightly deeper scour due to intensified flow interference. Increasing spacing reduces pile-to-pile interaction and leads to scour patterns resembling single-pile behavior. Overall, the numerical model reliably captures scour mechanisms and provides useful insights for safer pile-group design.
Co-Authors Ameylia Fatimah Ardhani, Muhammad Zidan Erna Dwi Rahayu Fabiantoro, Alif Reza Haw-Tang, Jyh Hendrawan, Ilham Mars Hendry Setyawan, Hendry Indra Komara, Indra Jaka Propika Jaka Propika Jyh-Haw Tang Lestari, Laras Laila Nabilla Ayu Januarista Nur Syiefa Hidayah Prayoga, Rahmat Budi Ramadhan, Muhammad Lucky Sandy Reza Al Rasyid Tri Susilo Winata, Dyas Ray