Journal Application Civil Engineering

Analisis Daya Dukung Struktur Bawah Pada Integrasi Jembatan Terpisah Ditinjau dari Alinyemen Jalan Nasional Semarang-Surakarta Kecamatan Bergas

2026-09-23T01:09:23+00:00

The Semarang–Surakarta National Road in Bergas District is a 4/2 divided national arterial road that currently uses two separate bridge structures. This study aims to evaluate the road geometric alignment and the safety of the substructure for a single-bridge configuration based on PDGJ 2021, Minister of Public Works and Housing Regulation No. 19 of 2023, and SNI 1725:2016. The analysis was conducted using manual calculations and AllPile 6.5 software. The results show that the existing horizontal alignment does not meet the minimum radius requirement of 230 m specified in PDGJ 2021, while the vertical curves do not meet the minimum safety values of 30 for sag curves and 26 for crest curves. The substructure analysis indicates that the soil bearing capacity, sliding stability, and overturning stability meet the safety requirements, with a safety factor (SF) ≥ 1.5. The AllPile 6.5 analysis also shows that the well foundation is capable of resisting the applied axial, lateral, and moment loads, with a foundation settlement of 1.11 cm, which is less than the allowable limit of 2 cm. Therefore, the substructure is considered safe to support a single bridge structure.

Analisis Kapasitas Sungai Tuntang Terhadap Debit Banjir Rencana Menggunakan Hec-Ras di Desa Baturagung, Kabupaten Grobogan

2026-09-23T07:41:12+00:00

The Tuntang River is one of the major rivers in Grobogan Regency that plays an important role as a natural drainage channel. However, several sections of the river, particularly in Baturagung Village, frequently experience overflow during the rainy season. This study aimed to determine the design flood discharges for 2-, 5-, 10-, 25-, 50-, and 100-year return periods, evaluate the capacity of the Tuntang River to convey the design flood discharges, and assess the potential for river overflow using HEC-RAS. Hydrological analysis was conducted using annual maximum daily rainfall data from 2011 to 2025 collected at the Tuntang, Rawa Pening, and Jragung rainfall stations. Areal rainfall was calculated using the Thiessen Polygon method, while the design flood discharges were generated using the HEC-HMS model, which was calibrated with an RMSE of 0.42, a PBIAS of 0.00%, and an NSE of 0.820. The resulting design flood discharges were subsequently used as input for hydraulic modeling in HEC-RAS. The results showed that the design flood discharges for the 2-, 5-, 10-, 25-, 50-, and 100-year return periods were 22.7 m³/s, 28.3 m³/s, 32.1 m³/s, 36.9 m³/s, 40.5 m³/s, and 44.0 m³/s, respectively. The HEC-RAS simulation indicated that river overflow occurred from STA 9 to STA 18 for the 2- to 25-year return periods and extended to STA 8 for the 50- and 100-year return periods. These findings indicate that the existing capacity of the Tuntang River within the study area in Baturagung Village is insufficient to convey the design flood discharges, thereby increasing the potential for flooding.

Analisis Kapasitas Dan Kinerja Struktur Tahan Gempa Sistem Rangka Pemikul Momen Khusus Dan Sistem Ganda (Studi Kasus: Gedung Pwm Semarang)

2026-09-23T08:06:49+00:00

Indonesia is located in the Ring of Fire region with a high level of earthquake vulnerability. This study aims to compare the capacity and performance of structures between the Dual System and SRPMK in the 16-story PWM Semarang Building based on SNI 1726:2019 and SNI 2847:2019 using ETABS. The parameters evaluated include vibration period, inter-story drift, displacement, P-Delta effect, base shear force, and structural irregularity. The results of the analysis of the vibration period of SRPMK of 3.18 seconds, in the Dual System of 2.15 seconds showed a stiffer 32.39%, the base shear force in the X direction in the Dual System was 1,899.15 kN while the SRPMK was 1244.40, a difference of 654.94 kN or 1.53%, for the Y direction shearforce of the dual system of 1,734.39 kN and SRPMK of 1,617.30 kN, there was a difference of 117.09 kN or 1.07%. The deviation between floors of the Dual System was able to reduce 71.62% in the X direction and 52.98% in the Y direction and had stability against P-Delta of around 51.09% better. Both systems met the requirements of mass participation and structural irregularities. Overall, the results of the Dual System analysis showed better performance, compared to SRPMK.

Perencanaan Pelebaran Ruas Jalan Menggunakan Box Culvert dan Manajemen Lalu Lintas di Jalan Arief Rahman Hakim Surabaya dengan Metode PKJI

2026-09-24T03:05:40+00:00

The rate of using land in a region increasingly had a rapid major impact on transportation facilities and infrastructures, especially in the area of east surabaya Becauseof less land for road widening, then it is planned to do road widening construction using Box Culvert. Because of this road widening is not destracting the rate of using land. Box Culvert is one of the buildings on the street who is on top and parallel with the flow of the river in order to reduce the traffic load without reducing the functionality of the river. In the case of the road widening there should do an performed traffic evaluation, especially in the Arief Rahman Hakim road Surabaya, Whether the way had met the secondary road collectors are required the regulation by Minister of Transportation 34 years 2006.in comparing these evaluations are needed both primary and secondary data. To analyze these roads, referring to the Indonesian Highway Capacity Manual (PKJI) in 2014. In the collection of the primary data obtained by field survey and secondary data from the institutions associated with the data. From the analysis using the Indonesian Highway Capacity Manual (PKJI) in 2014 obtained degrees of saturation (DJ) = 1.06, average speed (Vt) = 18 km / h. From the analysis results tabulated by the Guttman scale to get the 41.67% it could be inferred that the Arief Rahman Hakim road has not met the secondary road collectors such as the conditions for Regulation of Transport 34 in 2006. Due to the existing condition of the road is not appropriate in this thesis, the author recommends traffic management with a box culvert. To realize these recommendations are needed for existing analysis of the river channel slope with the results I = 0.000392, so it could not interrupt the flow of the river. Planning refers to the structural loading RSNI T-02-2005 and other guidelines.

Analisis Stabilitas Lereng Dan Perencanaan Dinding Penahan Tanah Pada Sungai Garang, Kampoeng Harmoni, Kecamatan Ungaran Barat, Kabupaten Semarang

2026-09-24T06:19:43+00:00

The slope along the Garang River at the Kampoeng Harmoni housing complex in West Ungaran District, Semarang Regency, has repeatedly experienced landslides caused by river flow scouring the slope toe and removing its lateral support. This study aims to identify soil characteristics, analyze slope stability, and assess the scour depth at the slope toe to inform the design of a retaining wall. Stability analysis was performed manually using the Fellenius and Bishop methods and verified with Plaxis 2D, while scour was analyzed using the regime method (Lacey). Soil data were obtained from laboratory tests on samples from three boreholes (BH1–BH3) reaching a depth of 20 m. The results indicate that the site soils, classified under the USCS, consist of SM (silty sand), SW (well-graded sand), and MH (high-plasticity silt). The existing slope safety factors were 1.15–1.24 (Fellenius and Bishop; "somewhat stable" category) and 1.29–1.30 (Plaxis; "moderate" category), with a toe scour depth of 0.610 m identified as a contributing factor to the landslides. Based on these conditions, a gravity retaining wall with a height of 7.8 m and a base width of 7.0 m was designed; this design increases the safety factor to 1.67 (static) and 1.68 (consolidation), making it an effective and safe solution for mitigating landslide risk.