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All Journal Journal of Infrastructure and Facility Asset Management
Siagian, Freddy
The National Road Construction Agency (BPJN) for Southeast Sulawesi, Directorate General of Highways, Ministry of Public Work and Housing (PUPR), Kendari, Indonesia
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Energy Engineering Environmental Science Library & Information Science Mathematics Transportation

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Existing Design Analysis of Slope Reinforcement on Clayey Soil and Its modified Alternatives (Case Study : Awunio – Lapuko National Road, Southeast Sulawesi) R, Zahrial Firman; Khoiri, Mohamad; Siagian, Freddy
Journal of Infrastructure & Facility Asset Management Vol 6 (2024): Special Issue 1 : Journal of Infrastructure & Facility Asset Management
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/jifam.v6i0.19937

Abstract

The slopes of the Awunio - Lapuko national road section are prone to landslides, which pose a threat to the road asset management. Hard soil layer with an NSPT value >60 is found at a depth of 4 metres. The slope has been reinforced with cantilever walls (CW) and caisson as well as retaining walls and bored pile. In this research, the problem that needs to be studied is the stability of the existing slope with and without reinforcement using the cracked soils approach to obtain the factor of safety (FS) for critical conditions with the Limit Equilibrium Method (LEM). The CW is calculated for overturning stability, shear stability, foundation bearing capacity and overall stability. In addition, bored pile should also be evaluated when considered as a lateral pile based on NAVFAC, bearing capacity within the group, max & min stress and deflection capacity.  The result of  LEM program analysis shows the slope failure mechanism due to the existence of slip plane between weak soil layer and strong soil layer. Furthermore, the stability of existing reinforcement such as CW only or CW combined with caisson is insufficient. While the stability of reinforcement CW combined with bored pile or alternative modification such as subdrain combined with geotextile meets the requirements.
Evaluation and Planning of Strong and Durable Roads Due to Overloaded Vehicle (Case Study : The National Road Bts. Kab. Konawe Utara/Kab. Konawe – Pohara) Kurniawan, Reza; Mochtar, Indrasurya Budisatria; Siagian, Freddy
Journal of Infrastructure & Facility Asset Management Vol 5, No 1 (2023): Journal of Infrastructure & Facility Asset Management
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/jifam.v5i1.20528

Abstract

In 2020, more than half of the national road length of Bts. Kab. Konawe Utara/Kab. Konawe – Pohara is in a heavily damaged condition. This is due to the heavy vehicles used for the development of the Konawe Industrial Estate passing through this road. This research was carried out by collecting primary data from vehicle tire pressure surveys and secondary data in the form of the results of the 2021 vehicle weight test. Axle loads in the field can be predicted using vehicle tire pressure. Vehicle Damage Factor (VDF) calculation is carried out and compared with the VDF given by the 2017 Revision Pavement Design Manual (MDP). From the various VDF data, a Cumulative Equivalent Single Axle Load (CESAL) calculation is also carried out and also compared. The results obtained from this study are that the actual VDF at the study site for vehicle classes 6b and 7a are respectively greater up to 1.58 and 7.37 times than the actual VDF for the Sulawesi region given by MDP 2017. In direct proportion to that, CESAL due to field loads is greater is up to 3.03 times greater than CESAL due to the actual load for the Sulawesi region provided by the 2017 MDP. The CESAL value due to field loads is up to 7.25 times greater than the CESAL due to the normal load provided by the 2017 MDP.
Co-Authors Khoiri, Mohamad Kurniawan, Reza Mochtar, Indrasurya Budisatria R, Zahrial Firman