Garuda - Garba Rujukan Digital

p-Index From 2020 - 2025

0.983

P-Index

This Author published in this journals

All Journal IPTEK Journal of Proceedings Series Syntax Literate: Jurnal Ilmiah Indonesia Jurnal Aplikasi Teknik Sipil Journal of the Civil Engineering Forum

Indrasurya B. Mochtar

Institut Teknologi Sepuluh Nopember

Author-ID : 3183133

Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Environmental Science Law, Crime, Criminology & Criminal Justice Social Sciences Other

Published : 8 Documents Claim Missing Document

Claim Missing Document

Articles

Influence of Residential Spatial Position to Trip Generation in Surabaya Wahju Herijanto; Indrasurya B. Mochtar; Achmad Wicaksono
IPTEK Journal of Proceedings Series No 6 (2017): The 3rd International Conference on Civil Engineering Research (ICCER) 2017
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2017i6.3274

Zonal trip generation is usually assummed to be influenced only by demographic and economic variables. It is seldom to consider spatial position of the zones as an influence variables to its trip generation. In actual condition, people will consider strategic position of residential area when they choose to buy or rent of their home, in accordance with their place of activities such as working, studying for their children and shopping. This research aim is to calculate the influence of spatial position of residential zones from the activities centers to zonal trip generation in Surabaya, Indonesia. Surabaya has several activities centers that can be classified as urban centers and suburban centers. In order to define position of residential zones in relation with activities centers, travel time is defined as a spatial measure which can be measured using Google Maps. Trip generation data is compiled from origin-destination matrix from household interview survey. Regression analysis is used for calculation of the influence of spatial position of residential zones in relation to the activities centres to zonal trip generation. The result shows that travel time to urban center influences reduction of the residential trip generation more than travel time to suburban centers does. However, still many trips were not influenced by travel time from residential to city center since housing ownership in Surabaya is fixed system more than flexible one, and housing at periphery area much cheaper than at city center.

Prediction of Flexible Pavement Deflection Based on Falling Weight Deflectometer, FWD, for Highways Traversed by Heavy Overloaded Vehicles (Case Study on Arterial And Collector Roads in Tuban, East Java, Indonesia) Catur Arif Prastyanto; Indrasurya B. Mochtar
IPTEK Journal of Proceedings Series No 6 (2017): The 3rd International Conference on Civil Engineering Research (ICCER) 2017
Publisher : Institut Teknologi Sepuluh Nopember

Falling Weight Deflectometer, FWD, is the most popular equipment used to measure the deflection of flexible pavement in Indonesia. The loading used during application of the FWD equipment generally correlates directly with those of the loads of standard heavy vehicles. Therefore, the resulted pavement deflections obtained from the tests should be also suitable for highways traversed by standard normal vehicles only. This may not be the case for highways in Indonesia, where most trucks are highly overloaded, so much beyond the allowable standard loads. The existing method of FWD test may not be representative anymore to measure the actual pavement deflections under highly overloaded vehicles. In this paper, the authors describe their findings about deflections of flexible pavement when the pavements were subjected by heavily overloaded vehicles. The first step is to modify the FWD equipment with larger falling distances and heavier loads to simulate the highly overloaded vehicles in Indonesia. Based on the results and by using statistical approach, a new mathematical equation can be derived to reflect the functions of actual pavement deflections under much higher loads when compared to those of standard normal load. Therefore, using this new equation one can predict the actual pavement deflection under highly overloaded vehicles, by just performing standard FWD test of standard loads on the pavement, so that the design of overlay thickness can be modified accordingly to be applicable to overloaded traffic in Indonesia.

Taxiway Pavement Evaluation to Support the Operational of Terminal 2 Juanda Airport Istiar Istiar; Indrasurya B. Mochtar; Wahyu Herijanto; Catur Arif Prastyanto
IPTEK Journal of Proceedings Series No 6 (2017): The 3rd International Conference on Civil Engineering Research (ICCER) 2017
Publisher : Institut Teknologi Sepuluh Nopember

The movement of aircraft and passengers at Juanda international airport is increasing every year. In 2012, the air side infrastructure of Juanda airport almost reached the maximum capacity. In other side, PT. Angkasa Pura I as the operator of Juanda airport had planned to revitalize the Juanda airport terminal that located on the south side. This terminal was not operated for 8 years. The pavement of taxiway should be evaluated its strength. The evaluation method compared The Pavement Classification Number (PCN) of taxiway pavement with Aircraft Classification Number (ACN). If PCN value was higher than ACN value, so the taxiway pavement could serve aircraft movements. The pavement of taxiway on Juanda airport evaluated by using software COMFAA. Data input into the software COMFAA was the existing pavement structure and the movement of the aircraft that will to use south side of Juanda Airport Terminal. The scenario 1 result is the exiting pavement should be overlaid 7 inches to support The operational of Terminal 2 Juanda Airport. In other side, scenario 2 result showed that the existing taxiway pavement structure was able to hold the load of aircraft movements over 20 years. The PCN value is 80.2 dan the ACN values are 89.3 in the scenario 1 and 75 in the scenario 2.

Pemecahan Masalah Stabilitas Abutment dan Oprit Jembatan di Atas Tanah Lunak Menggunakan Relieving Platform Nabilla Zahera; Indrasurya B. Mochtar; Trihanyndio Rendy Satrya
Jurnal Aplikasi Teknik Sipil Vol 19, No 3 (2021)
Publisher : Departemen Teknik Infrastruktur Sipil Institut Teknologi Sepuluh Nopember Surabaya

Permasalahan yang sering terjadi pada perencanaan jembatan yang dibangun pada tanah lunak adalah pergerakan yang berlebihan secara horizontal pada abutment. Menyiasati kondisi tersebut, perencana mengganti konstruksi menjadi slab on piles. Hanya saja penambahan konstruksi tersebut akan menambah biaya sehingga kurang efektif dan memerlukan metode alternatif. Metode alternatif yang efektif adalah menggunakan relieving platform dan tiang-cerucuk yang dipasang di belakang abutment. Oprit jembatan dianalisis pada pada tanah lunak berlapis dengan konsistensi very soft, soft, dan medium. Hasil penelitian pada ketinggian (4m s/d 12m), oprit mengalami kemungkinan kelongsoran (SF ≤ 1). Pada analisis perhitungan, tiang diberi variasi diameter; 30cm, 50cm, dan 60 cm; tipe kelas C; jarak antar tiang 2,5D dan 3D untuk mengetahui sistem yang paling efektif. Hasil penelitian menunjukkan konstruksi yang paling efektif pada ketinggian (4m s/d 12m) adalah pada jarak 2,5D; diameter 30 cm. Walaupun menghasilkan jumlah tiang yang lebih banyak tetapi menghasilkan tambahan biaya yang jauh lebih murah.

Analisis Kebutuhan Perkuatan Geotextile untuk Tinggi Timbunan Badan Jalan yang Bervariasi di atas Tanah Lunak Pada Kondisi dengan dan tanpa Pemasangan PVD (Prefabricated Vertical Drain) Rohmahillah Aviskanasya Septiandri; Indrasurya B. Mochtar; Yudhi Lastiasih
Jurnal Aplikasi Teknik Sipil Vol 19, No 3 (2021)
Publisher : Departemen Teknik Infrastruktur Sipil Institut Teknologi Sepuluh Nopember Surabaya

Kebutuhan perkuatan geotextile dipengaruhi oleh kondisi tanah dasar itu sendiri. Perbedaan kondisi tanah dasar ketika dengan pemasangan PVD (Prefabricated Vertical Drain) dan tanpa pemasangan PVD terletak pada daya dukungnya. Daya dukung tanah dasar dengan pemasangan PVD lebih tinggi daripada tanpa pemasangan PVD, hal tersebut dikarenakan kenaikan harga Cu sebagai akibat pemampatan konsolidasi sehingga mempengaruhi jumlah kebutuhan perkuatan geotextile. Pada geotextile dengan Tult yang sama, kebutuhan jumlah perkuatan geotextile dengan pemasangan PVD lebih sedikit daripada tanpa pemasangan PVD, sedangkan pada geotextile dengan Tult yang bervariasi terdapat batasan untuk kondisi tanpa pemasangan PVD. Pada kondisi tanpa pemasangan PVD, semakin tinggi timbunan maka Tult geotextile yang digunakan semakin tinggi, sedangkan untuk kondisi dengan pemasangan PVD, Tult geotextile yang digunakan untuk semua variasi tinggi timbunan dalam penelitian ini minimal 50 kN.

EFISIENSI DAYA DUKUNG TIANG DALAM GRUP MENGGUNAKAN PENDEKATAN ANALISA FEM 3D ROHMAT ALI MUHSIN; Indrasurya B. Mochtar; Mohamad Khoiri
Jurnal Aplikasi Teknik Sipil Vol 21, No 1 (2023)
Publisher : Departemen Teknik Infrastruktur Sipil Institut Teknologi Sepuluh Nopember Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j2579-891X.v21i1.15348

Besar kecil nilai efisiensi pada pondasi tiang dalam grup terjadi karena pengaruh overlapping persebaran tegangan. Beberapa rumus untuk menghitung efisiensi hanya menggunakan tipe pondasi end bearing capacity. Padahal ada tipe pondasi pondasi friction bearing capacity. Yudiawati (2019) mengamati efisiensi full friction didapatkan bahwa kelompok tiang yang lebih dalam memiliki nilai efisiensi lebih rendah. Metode penelitian tersebut dilakukan aktual sehingga biaya dan waktu dihabiskan besar dan variasi diuji sedikit. Sehingga perlu metode lebih efektif yakni Finite Element Method 3D (FEM 3D). Dengan FEM 3D jumlah variasi yang diujikan bisa lebih banyak dan waktu yang digunakan juga relatif singkat. FEM 3D dipilih karena memiliki karakteristik yang paling mendekati dengan yang aktual. Hasilnya efisiensi pada FEM 3D menunjukkan bahwa tipe pondasi pondasi mempengaruhi besar kecil nilai efisiensi. Tipe pondasi full friction memiliki 40% nilai efisiensi lebih kecil dibandingkan tipe end bearing capacity. Selain itu Semakin panjang kedalaman tiang maka semakin kecil nilai efisiensi. Pada tipe pondasi end bearing capacity pengaruh kedalaman tidak terlalu signifikan hanya sebesar 1-5%. Sedangkan pada tipe full friction pengaruh kedalaman terhadap nilai efisiensi bisa mencapai 5-10%. Pada penelitian ini Nilai efisiensi pada tipe End bearing adalah berkisar antara 0,45-0,9. Sedangakan untuk tipe full friction berkisar antara 0,23-0,65.

Increasing the Bearing Capacity of Shallow Foundations on Soft Soil After the Installation of Micro-Piles Isnaniati; Indrasurya B. Mochtar
Journal of the Civil Engineering Forum Vol. 9 No. 3 (September 2023)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jcef.5925

The bearing capacity of shallow foundations on soft soils can generally be estimated based on Local Shear Failure (Terzaghi theory). Several researchers previously stated that the installation of micro-piles on the failure area (slide) can increase the shear strength of the soil. This can be followed up by providing micro-pile reinforcement to prevent lateral soil movement. Therefore, this research was conducted to increase the bearing capacity of shallow foundations on medium-consistency soft clay soils that have been reinforced with micro piles. The research was conducted using modeling in the laboratory with a scale of 1:30. The soil sample used was kaolin clay made from slurry made from kaolin powder with a water content (wc = 1.77 LL), liquid limit (LL = 62.35%) and sample diameter (d = 33 cm). The slurry was formed by compacting at a medium consistency level with an undrained cohesion value (cu = 0.397 kg cm-2). The micro-pile material in the form of apus bamboo was installed, varying in diameter (d) 0.2 cm (0.027 B), 0.3 cm (0.04 B), and 0.5 cm (0.07 B); sum (n) 4, 9, 16, and 25; and length (L) 10 cm (1.33B), 13 cm (1.73B), and 16 cm (2.13B) micro-piles. While the foundation model uses a squarefoundation B x B with B = 7.5 cm. The tests were carried out before and after the micro-piles were reinforced with a soil shear failure test. The results showed that a decrease of 0.1B caused an increase in the ultimate bearing capacity of the micro-pile (qult-empirical, 0.1B) from the ultimate bearing capacity before installing the micro-pile. This value is then used to determine the ultimate bearing capacity ratio so that Rq,0.1B = qult-empirical,0.1B/qult-Terzaghi with the optimum bearing capacity ratio occurring at Rq,0.1B with n3 = 16, d2 = 0.04B, L2 = 1.73B.

Studi Alternatif Peningkatan Stabilitas Lereng Jalan Akses (Studi Kasus Proyek Pembangunan Taman Teknologi Turyapada Tower Komunikasi Bali Smart 6.0 Kerthi Bali) Ari Kurniawan; Indrasurya B. Mochtar
Syntax Literate Jurnal Ilmiah Indonesia
Publisher : Syntax Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36418/syntax-literate.v10i8.61395

Information technology is advancing rapidly, especially with digital technology and the Internet of Things becoming highly dynamic. Improvements in information services are also being developed extensively throughout the region to support government programs in information dissemination and equitable development and telecommunications infrastructure. However, not all people can benefit from these technological advances due to limited access to information. The Bali Provincial Government has recognized this limited access, as residents in North Bali lack equal access to information due to limited television broadcasting infrastructure and internet signal issues. To this end, the government has built the Turyapada Technology Park, a Bali Smart 6.0 Communication Tower, which primarily functions as a terrestrial digital television transmitter and telecommunications signal transmitter. The tower was constructed in Pancasari Village, a hilly location at an altitude of 1,525 meters above sea level, considering its potential for broadcast coverage across North Bali. This location presents challenges due to its geological conditions, situated on a ridge with limited land and varying soil conditions. Therefore, this topic was chosen for research on alternatives to improve the slope stability of the Turyapada Tower access road. This study aims to examine the stability of natural slopes from the perspective of conventional geotechnical assumptions and the cracked soil theory of the Geo5 support program.

Co-Authors Ari Kurniawan Isnaniati . Istiar Istiar Lastiasih, Yudhi Mohamad Khoiri Nabilla Zahera Prastyanto, Catur Arif ROHMAT ALI MUHSIN Septiandri, Rohmahillah Aviskanasya Trihanyndio Rendy S, Trihanyndio Rendy Wahju Herijanto Wahyu Herijanto Wicaksono, Achmad

Title

Found 8 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 8 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 8 Documents
Search