Prokons Pub Date : 2021-06-01 DOI: 10.32497/WAHANATS.V26I1.2645

M. Sahid, Niza Widiana

{"title":"INVESTIGASI FAKTOR PENYEBAB COST OVERRUN OLEH KONTRAKTOR PADA PROYEK JALAN APBD KABUPATEN KARANGANYAR TAHUN 2017 DAN 2018","authors":"M. Sahid, Niza Widiana","doi":"10.32497/WAHANATS.V26I1.2645","DOIUrl":"https://doi.org/10.32497/WAHANATS.V26I1.2645","url":null,"abstract":"The rapid development of road project development cannot be separated from the cost problem which often experiences cost overrun. This swelling can occur if a project management and control is not going well and does not meet the project target. The study was conducted to see the dominant factors that caused the cost overrun by the contractor for the implementation of the Karanganyar District Budget in Central Java Province which took place in 2017 and 2018, by distributing questionnaires to contractors. The results of the respondents collected were 36 respondents with 27 respondents. The questionnaire was processed by data processing using the SPSS (Statistical Package for Social Sciences) version 25 program. Reliability testing of 36 questionnaires showed that there were three unreliable questionnaires. In addition, the validity results of several variables in the questionnaire were obtained, namely one invalid variable. In addition to the validity and reliability tests, parametric statistical tests and multiple linear analysis were also carried out, then the results of the dominant factors that led to the implementation of Cost Overrun were schedule due to the influence of weather, disasters, poor cost control, not taking into account unexpected costs, and interest rates. bank loans, as well as the proportion of dominant cost overruns that occurs between 1% -5%","PeriodicalId":34836,"journal":{"name":"Prokons","volume":"31 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83571714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

KAJIAN PERBANDINGAN PENGARUH PENGGUNAAN DINDING PRECAST DENGAN DINDING KONVENSIONAL PADA PROYEK CORDOVA SEMARANG

Prokons Pub Date : 2021-06-01 DOI: 10.32497/WAHANATS.V26I1.2643

Muhamad Arif Rohman, M. Wibowo, Nuroji Nuroji

{"title":"KAJIAN PERBANDINGAN PENGARUH PENGGUNAAN DINDING PRECAST DENGAN DINDING KONVENSIONAL PADA PROYEK CORDOVA SEMARANG","authors":"Muhamad Arif Rohman, M. Wibowo, Nuroji Nuroji","doi":"10.32497/WAHANATS.V26I1.2643","DOIUrl":"https://doi.org/10.32497/WAHANATS.V26I1.2643","url":null,"abstract":"Innovation in the world of construction is something that is indispensable, one of theinnovations in the construction sector is precast. The use of precast is expected to beable to reduce project costs to accelerate the duration of work. But in fact, theproducts of innovation in the world of construction have not been fully able to havea positive impact, both in terms of cost, quality, time, waste, on project development.Products of innovation are usually not necessarily in accordance with the wishesand needs of the customer. The purpose of this research is to analyze thecomparison of products in terms of time, cost, quality, waste, and in terms of K3Lbetween projects using precast walls and projects using the lightweight brick wallmethod. This research was conducted by (1) conducting a project simulation if theproject did not use precast, (2) comparing a real project with a simulation project interms of cost, quality, time, waste, and K3L. The use of precast in the Cordovaproject when compared to a simulation project that uses lightweight bricks results in(1) in terms of time saving 36,84 % on the simulation results project (2) in terms ofcosts can be reduced by Rp. 101.488.543,99 (3) in terms of quality precast materialhas The quality is better than the lightweight bricks (4) in terms of waste, in thesimulation result project it creates more waste (5) in terms of K3L, the use ofprecast is more environmentally friendly than the simulation results project.","PeriodicalId":34836,"journal":{"name":"Prokons","volume":"94 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87504488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

KAJIAN OPERASIONAL SISTEM POLDER UNTUK PENANGANAN BANJIR DAN ROB DI KAWASAN GENUK SEMARANG

Prokons Pub Date : 2021-06-01 DOI: 10.32497/WAHANATS.V26I1.2648

Henny Pratiwi Adi, I. Wahyudi

{"title":"KAJIAN OPERASIONAL SISTEM POLDER UNTUK PENANGANAN BANJIR DAN ROB DI KAWASAN GENUK SEMARANG","authors":"Henny Pratiwi Adi, I. Wahyudi","doi":"10.32497/WAHANATS.V26I1.2648","DOIUrl":"https://doi.org/10.32497/WAHANATS.V26I1.2648","url":null,"abstract":"The Kaligawe Genuk area is the main route for the North Coast (Pantura) of Java.The area is the gateway to the city of Semarang from the east direction. Since 2005,this area has frequently had floods caused by tides (tidal floods) and rainfall. TheCentral Government, supported by the Semarang City Government, built the KaliTenggang and Sringin Polder systems from 2016 to 2019. In terms of capacity, thissystem is not yet perfect for dealing with floods, and it requires efforts so that thesystem can be operated optimally. This study activity aims to simulate rainfall flowrate, the pump capacity, and the retention pond. The simulation results will becomethe basis for the development of the polder system operational manual. Theimplementation method collects secondary rainfall data, reviewing the condition ofa catchment area, retention pond, and pump station. Focus group discussion withstakeholders done in the Kaligawe Genuk area. The location of the activity is morefocused on the Kali Sringin area. This study produces tables and graphs of pumpcapacity simulation, retention ponds, and an operational manual for the SringinPolder system. It is hoped that this guideline will become the basis for the poldersystem's sustainable operations.","PeriodicalId":34836,"journal":{"name":"Prokons","volume":"69 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74105844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pengaruh Kadar Filler Fly Ash dalam Campuran AC-WC dengan Pasir Pantai Takisung sebagai Agregat Halus Ditinjau dari Aspek Ketidakrataan dan Properties Marshall

Prokons Pub Date : 2020-12-31 DOI: 10.23917/dts.v13i2.13053

A. Riyanto, Ramdhani Deva Prasetya

{"title":"Pengaruh Kadar Filler Fly Ash dalam Campuran AC-WC dengan Pasir Pantai Takisung sebagai Agregat Halus Ditinjau dari Aspek Ketidakrataan dan Properties Marshall","authors":"A. Riyanto, Ramdhani Deva Prasetya","doi":"10.23917/dts.v13i2.13053","DOIUrl":"https://doi.org/10.23917/dts.v13i2.13053","url":null,"abstract":"Penggunaan fly ash sebagai filler dan pasir pantai sebagai agregat halus dinilai dapat mengurangi kerusakan perkerasan jalan Asphalt Concrete-Wearing Course (AC-WC). Kandungan silika pada fly ash memiliki daya ikat kuat, sehingga dapat memperbaiki Properties Marshall pada campuran. Gradasi pasir pantai yang seragam dapat memperbaiki nilai ketidakrataan. Berdasarkan ulasan di atas penelitian ini bertujuan menganalisis pengaruh kadar filler Fly Ash dengan pasir Pantai Takisung sebagai agregat halus dalam campuran terhadap aspek ketidakrataan dan Properties Marshall, sekaligus menganalisis kadar filler optimum ditinjau dari aspek Properties Marshall. Langkah awal penelitian yaitu pengumpulan data (primer dan sekunder). Berdasarkan data, ditentukan proporsi setiap fraksi dalam campuran sesuai dengan variasi kadar filler. Selanjutnya pencarian KAO dengan agregat halus menggunakan Pasir Pantai Takisung dan dilanjutkan dengan membuat campuran dengan variasi kadar filler fly ash 0%, 3%, 4%, dan 5%. Sebelum sample direndam dan diuji Marshall maupun Volumetrik, sample diuji nilai ketidakrataan dengan menggunakan metode Sand Patch dan pendekatan berat. Hasil penelitian menunjukkan penggunaan pasir pantai sebagai agregat halus dengan filler fly ash dapat memperbaiki nilai ketidakrataan pada permukaan. Penambahan filler fly ash dapat memperbaiki nilai Properties Marshall campuran pasir pantai terutama aspek stabilitas dan MQ. Nilai ketidakrataan yang didapat sebagai berikut; sample pasir sungai = 3,82 m/km, sample pasir pantai = 3,49 m/km, sample kadar filler 3% = 2,63 m/km, kadar filler 4% = 2,54 m/km, kadar filler 5% = 2,59 m/km. Kadar filler optimum yang didapat yaitu 3,3%. Pada kadar filler tersebut didapat nilai Properties Marshall; Stabilitas = 1197,62 kg, flow = 2,32 mm, VFWA = 66,74 %, VMA = 15,01 %, VIM = 4,99 %, dan MQ = 517,02 kg/mm, yang kesemuanya masuk spesifikasi yang telah ditentukan.","PeriodicalId":34836,"journal":{"name":"Prokons","volume":"66 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90452655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Tinjauan Perilaku Dinamik Balok T dengan Perkuatan CFRP Jenis Wrap (Studi Eksperimental, Balok Beton Bertulang) T梁动态行为检讨与wfrp类型Wrap冲击(实验研究，钢筋混凝土块)

Prokons Pub Date : 2020-12-31 DOI: 10.23917/dts.v13i2.13056

Johanes B Muda, B. Supriyadi, M. Muslikh, S. Siswosukarto

{"title":"Tinjauan Perilaku Dinamik Balok T dengan Perkuatan CFRP Jenis Wrap (Studi Eksperimental, Balok Beton Bertulang)","authors":"Johanes B Muda, B. Supriyadi, M. Muslikh, S. Siswosukarto","doi":"10.23917/dts.v13i2.13056","DOIUrl":"https://doi.org/10.23917/dts.v13i2.13056","url":null,"abstract":"Penggunaan CFRP sebagai pilihan dalam revitalisasi komponen struktur saat ini sangat banyak digunakan dan di kembangkan. Penggunaan CFRP bertujuan untuk meningkatkan kapasitas lentur dan geser balok, namun pada penerapannya penambahan CFRP berpengaruh terhadap perubahan kekakuan dan pola keruntuhan balok tersebut. Perilaku dinamik dari komponen struktuktur dalam penelitian ini digambarkan oleh nilai frekuensi alami komponen struktur dalam pengujian lentur dan geser. Penelitian ini menggunakan enam buah benda uji yaitu tiga benda uji balok T dengan perkuatan CFRP wrap pengujian lentur (BC1, BFR1, BFR2) dan tiga benda uji balok T dengan perkuatan CFRP wrap pengujian geser (BCg, BC1g, BC2g). Dari hasil pengujian, penambahan perkuatan CFRP meningkatkan nilai frekuensi alami benda uji BFR1 , BFR2, BC1g, BC2g berturut-turut sebesar 41.29%, 42.86%, 10.34%, 15%. Peningkatan frekuensi alami ini juga divalidasi dengan adanya peningkatan kekakuan benda uji BFR1 , BFR2, BC1g, BC2g berturut-turut sebesar 2.08%, 20.50%, 65.68%, 107.2%. Dari hasil pengujian lentur benda uji tanpa perkuatan (BCl) mengalami penurunan nilai frekuensi dari kondisi awal ke kondisi runtuh sebesar 29.8%, lebih besar dari benda uji dengan perkuatan BFR1 (10.33%) dan BFR2 (20.13%). Sedangkan pada pengujian geser benda uji tanpa perkuatan (BCg) mengalami penurunan nilai frekuensi dari kondisi awal ke kondisi runtuh sebesar 9.58%, lebih besar dari benda uji dengan perkuatan BC1g (7.10%) dan BC2g (6.74%). Dari data hasil pengujian ini dapat disimpulkan bahwa terdapat peningkatan nilai frekuensi alami balok T dan penambahan kekakuan balok T akibat adanya penambahan perkuatan CFRPwrap pada balok T yang mana dalam kondisi awal hanya bertujuan untuk meningkatkan kapasitas lentur dan geser balok T tersebut.","PeriodicalId":34836,"journal":{"name":"Prokons","volume":"53 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88516973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Uji Durabilitas Jembatan Kereta Api dengan Menggunakan Analisis Mikrotremor 使用微震颤分析对铁道桥的二线程测试

Prokons Pub Date : 2020-12-31 DOI: 10.23917/dts.v13i2.13055

A. Maulana, Rini Kusumawardani

引用次数: 2

PENGARUH PENAMBAHAN LIMBAH PLASTIK JENIS THERMOSETTING TERHADAP MUTU BATA RINGAN (HEBEL)

Prokons Pub Date : 2020-12-30 DOI: 10.32497/wahanats.v25i2.2160

S. Supriyadi, Kusdiyono Kusdiyono, H. Wahyono, Marchus Budi Utomo, Imam Nurhadi

{"title":"PENGARUH PENAMBAHAN LIMBAH PLASTIK JENIS THERMOSETTING TERHADAP MUTU BATA RINGAN (HEBEL)","authors":"S. Supriyadi, Kusdiyono Kusdiyono, H. Wahyono, Marchus Budi Utomo, Imam Nurhadi","doi":"10.32497/wahanats.v25i2.2160","DOIUrl":"https://doi.org/10.32497/wahanats.v25i2.2160","url":null,"abstract":"At this time, plastic is a material that is needed by the wider community and its impact is also extraordinary after the plastic is used in everyday life which can cause serious problems if the management is not done properly. The problem of plastic waste does not only occur in the city of Semarang, but also in other cities, so that the Ministry of Environment and Forestry to impose a program to use paid plastic bags in the short term. But this is only to deal with problems in the short term. In the long run, it will not solve the problem of \"plastic waste\", because the policy actually encourages people to buy plastic which, of course, will add a new burden on the community to buy it. The results showed that the compressive strength of light brick with the model / type of BN s.d. B10.0 with 10 variations of the mixture of the addition of plastic waste starting from (1.0 to 10.0)% to the weight of Portland Cement (PC) there is a decrease in the average compressive strength. The lowest was the addition of 10.0% plastic waste with an average compressive strength of 9.88 kg / cm². The regression equation obtained Y = 0.042 X ² - 1.177 X + 18.84 with a correlation value R ² = 0.934, meaning that the addition of plastic waste ranging from (1.0 to 10.0)% of the weight of Portland Cement (PC) has the effect of \"very strong \"against the compressive strength. So we can get a picture that by adding the addition of plastic waste affects the compressive strength decreases. So that it can be investigated with other compositions by adding Fly Ash and sand made with a mixture ratio of 1 PC: 2 Aggregate (Sand and Fly Ash), with the hope that this Fly Ash waste can also be used for lightweight brick building elements","PeriodicalId":34836,"journal":{"name":"Prokons","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87157428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

PEMODELAN PENGARUH PEMOMPAAN SUMUR PRODUKSI PADA AKIFER DENGAN MUKA AIR TANAH MIRING 将生产井的影响原理与地下水的径流一致

Prokons Pub Date : 2020-12-30 DOI: 10.32497/wahanats.v25i2.2158

M. Ramli, Muhram Sula Idris, Wihdah Wihdah, Aswad Almuqarram, Hamdana Khaerunnisa

引用次数: 1

STRATEGI PERCEPATAN PROYEK MENGGUNAKAN METODE CRASH PROGRAM (Studi Kasus : Program Kerja Masa Pengeringan Proyek Rehabilitasi Saluran Induk Klambu Kiri Tahun 2017) 采用“崩溃方案”加速度策略(案例研究:一项工作时间干燥项目，2017年Klambu左侧主干道)

Prokons Pub Date : 2020-12-30 DOI: 10.32497/wahanats.v25i2.2163

Eko Marsudi Utomo, M. Wibowo, Sriyana Sriyana

{"title":"STRATEGI PERCEPATAN PROYEK MENGGUNAKAN METODE CRASH PROGRAM (Studi Kasus : Program Kerja Masa Pengeringan Proyek Rehabilitasi Saluran Induk Klambu Kiri Tahun 2017)","authors":"Eko Marsudi Utomo, M. Wibowo, Sriyana Sriyana","doi":"10.32497/wahanats.v25i2.2163","DOIUrl":"https://doi.org/10.32497/wahanats.v25i2.2163","url":null,"abstract":"Based on the initial plan from the contract of the Rehabilitation Klambu Kiri’s Project, main channel's work was carried out continously by an open and closed system using the kistdam method. However by the time of execution work, the stakeholders wanted the work in the main channel to be carried out based on cropping pattern, where there a drying period and a drainage period. In this case, flow area and bottom structure of the channel can only be worked during the drying period lasting three months. To be able to determine the impact of these change, a duration calculation is carried out from project's data which are internal's BQ, initial plan's resources, and the relations between activities using Microsoft Project on the flow section structure which be worked in drying period of 2017. The normal duration obtained from analysis is 203 days. It was exceeded time of drying period and possibly could have an impact on the overall project completion schedule resulting in delays, defaults and even termination of contracts. Therefore, it is necessary to have an accelerate strategy of the work on the flow section structure to be completed within a predetermined time. In this study, the acceleration strategy was carried out using crashing analysis in the critical activities from normal duration using Microsoft Project. The crashing method was carried out in stages from the crashing simulation of 30 days, 60 days, to 120 days so that obtained the duration of acceleration was 83 days. The cost component of acceleration is calculated by choosing the lowest cost from the alternatives of increasing work hours (overtime) or by adding resources. From the simulation results, the crash cost to complete the acceleration work is Rp. 1.298.307.591,- or about 2,05% of direct cost, so the efficiency is Rp. 9.692.409,- from normal duration","PeriodicalId":34836,"journal":{"name":"Prokons","volume":"100 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83612172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

PENILAIAN KERUSAKAN DAN KERUGIAN INFRASTRUKTUR PUBLIK AKIBAT DAMPAK BENCANA BANJIR DI KOTA SEMARANG 对三宝垄水灾影响公共基础设施的损害评估

Prokons Pub Date : 2020-12-30 DOI: 10.32497/wahanats.v25i2.2154

Ilham Sahid Wismana Putra, F. Hermawan, J. U. D. Hatmoko

{"title":"PENILAIAN KERUSAKAN DAN KERUGIAN INFRASTRUKTUR PUBLIK AKIBAT DAMPAK BENCANA BANJIR DI KOTA SEMARANG","authors":"Ilham Sahid Wismana Putra, F. Hermawan, J. U. D. Hatmoko","doi":"10.32497/wahanats.v25i2.2154","DOIUrl":"https://doi.org/10.32497/wahanats.v25i2.2154","url":null,"abstract":"Flood is a disaster that has the biggest threat, in terms of the number of victims or losses. Semarang City is a city that is classified as a flood prone area, this is due to the geographical location in the lowlands and highlands. The impact of the flood disaster caused damage and losses from various sectors of public infrastructure including the education service sector and health services. Damage and loss of public infrastructure will burden the government in the post-flood recovery phase. An assessment of infrastructure damage and losses from flooding is needed in order to help the Semarang City Government prepare a budget plan and manage rehabilitation and reconstruction. The purpose of this research is to explore the loss of public infrastructure due to the impact of the flood disaster, so that it can accelerate the post-disaster recovery process and management strategies for the risk of further flood disasters. The valuation method used is ECLAC (Economic Commission for Latin American and the Caribbean) Method. This method can identify damage and estimate the losses caused by floods. The results of this study are that each public infrastructure building has a different level of damage and loss and the budget allocation for disaster management each year is still inadequate. A risk transfer strategy is needed with an insurance financing scheme based on the level of risk in each infrastructure building.","PeriodicalId":34836,"journal":{"name":"Prokons","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78538464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

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