scholarly journals PERENCANAAN PERLINDUNGAN PILAR PADA JEMBATAN (Studi Kasus Bangunan Jembatan Trisula-Blitar)

2014 ◽  
Vol 8 (2) ◽  
pp. 158
Author(s):  
Winda Ekasari, Gerard Aponno, Moch. Sholeh
Keyword(s):  
River Flow ◽  
Hydraulic Engineering ◽  
Bridge Piers ◽  
Implementation Method ◽  
The Cost

Trisula bridge piers located at the delta of Brantas River do not have any protection from the stream of the river when flooding. The purpose of the design is to find out the scouring happens to piers caused by the river flow, to determine what kind of protection used to protect the piers, to plan the implementation method, to find out the cost, and the implementation time.Water discharge, pier dimensions, the span and depth of the river, the condition of piers, and velocity of the flow were needed to find out the scouring by Hydraulic Engineering Circular No. 18 application. The result was employed to determine the type of the protection. To find out the estimated costs were calculated through SNI-2012. Ms. Project were applied to find out the implementation time.Keywords: bridge, piers, scouring, partially grouted riprap

scholarly journals Effect of Angle between Pier and Center of River Flow on Local Scouring around the Bridge Pier

Water ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 3192
Author(s):  
Takuma Kadono ◽  
Shinichiro Okazaki ◽  
Yoshihiro Kabeyama ◽  
Toshinori Matsui
Keyword(s):  
Water Flow ◽  
Heavy Rainfall ◽  
River Flow ◽  
Bridge Pier ◽  
Bridge Piers ◽  
Flowing Water ◽  
River Flows ◽  
Scouring Depth

In recent years, heavy rainfall disasters have caused frequent damage to bridge piers due to scouring and have resulted in the fall of bridges in many areas in Japan. The objective of this study was to investigate the effect of local scouring around the downstream of the piers on the local scouring around the center of the river flowing at an angle to the piers. It was found that when the center of the river flows at an angle to the piers, the scouring area becomes wider from the upstream to the downstream of the piers because of the longer inhibition width of the piers positioned perpendicular to the water flow. The downstream scouring depth tends to be smaller than the upstream scouring depth. In addition, the time to the onset of tilting deformation of the piers increases with the inhibition width of the piers positioned perpendicular to the flowing water.

Assessing the Ensemble Spread–Error Relationship

2014 ◽  
Vol 142 (3) ◽  
pp. 1125-1142 ◽  
Author(s):  
T. M. Hopson
Keyword(s):  
River Flow ◽  
Forecast Error ◽  
Ensemble Prediction ◽  
Ensemble Prediction System ◽  
Before And After ◽  
Variable Dispersion ◽  
Strong Motivation ◽  
Error Correlation ◽  
The Stability ◽  
The Cost

Abstract The potential ability of an ensemble prediction system (EPS) to represent its own varying forecast error provides strong motivation to produce an EPS over a less expensive deterministic forecast. Traditionally, this ability has been assessed by correlating the realized forecast error with the ensemble's dispersion. This paper revisits the limitations of the skill–spread correlation, but uses aspects of the correlation to introduce two metrics to assess an EPS's capacity to provide a reliable likelihood of its own error. Using a perfect EPS, skill–spread correlation is shown to be limited by its dependence on how “skill” and “spread” are defined and, perhaps most fatally, by its inability to distill the skill–spread reliability from the stability properties of the physical system being modeled. Building from this, it is argued there are two aspects of an ensemble's dispersion that should be assessed. First, is there enough variability in the dispersion to justify the expense of the EPS? The factor that controls the theoretical upper limit of the spread–error correlation can be useful in diagnosing this. Second, does the variable dispersion of an ensemble relate to a variable expectation of the forecast error? Representing the spread–error correlation in relation to its theoretical limit can provide a simple diagnostic of this attribute. A context for these concepts is provided by assessing two operational ensembles: western U.S. temperature forecasts and Brahmaputra River flow before and after postprocessing. It is shown that “skill–spread” reliability can be improved by postprocessing to that of a perfect EPS, but at the cost of the potential information content of the EPS's variable dispersion.

STUDI EVALUASI PEKERJAAN STRUKTUR BOX CULVERT PADA PROYEK PEMBANGUNAN JEMBATAN KUCING RUAS SUKODADI – SUMBERWUDI KABUPATEN LAMONGAN

UKaRsT ◽  
2017 ◽  
Vol 1 (1) ◽  
pp. 6
Author(s):  
Hammam Rofiqi Agustapraja ◽  
Dwi Kartikasari
Keyword(s):  
Survey Method ◽  
Volume Calculation ◽  
The Road ◽  
Implementation Period ◽  
Implementation Method ◽  
The Cost ◽  
Bridge Building ◽  
Box Culvert ◽  
Preparatory Work

The bridge is a structure that serves to connect two parts of the road that are looked after by obstacles such as deep valley, river channel, irrigation, and disposal. The quality of bridge building is also influenced by the accuracy in selecting appropriate material. By minimizing errors that occur, to achieve efficient work in time, effort, and costs is required evaluation of the work Box Culvert on the project of Kucing bridge development Sukodadi-Sumberwudi road Lamngan Regency. In this research use survey method activity and reschedule in the project of Kucing bridge development Sukodadi-Sumberwudi. Work evaluation includes volume calculation, enumeration calculation, and job implementation method. The sequence of work start from the preparatory work, the ground work, the structure work Box Culvert. From the research was known the cost work of structure Box Culvert of Rp. 345.536.000,00 (Three Hundred forty five million five hundred thirty six thousand rupiah)  the implementation period is 8 weeks.Keywords: Volume Calculation, kucing bridge, Box culvert, and Implementation Method 

scholarly journals PERHITUNGAN HARGA POKOK PENJUALAN DAN HARGA JUAL PRODUK UNTUK KEBERLANGSUNGAN UMKM DAPUR PIPIT, JAMBI

2021 ◽  
pp. 735
Author(s):  
Joyce A. Turangan
Keyword(s):  
Financial Management ◽  
Online Training ◽  
Pricing Strategy ◽  
Selling Price ◽  
Financial Reports ◽  
Implementation Method ◽  
Cost Of Production ◽  
The Cost

This Abdimas activity is a request from the partner, named UMKM Dapur Pipit, which is engaged in the culinary business with superior pudding products. Although the partners' activities have been running, the owner feels that the pricing strategy that has been implemented so far and how the financial processing should be carried out is still lacking. The owner expects a training related to how to do good and correct financial management in order to achieve ideal financial management. Partners also expressed their desire to be able to understand the determination of the cost of production, selling prices, and how to manage the profits earned. The ABDIMAS team offers to provide solutions in the form of training in calculating the cost of goods sold and selling prices as the first step in managing the finances of UMKM that have been running so far. The output of this ABDIMAS activity is in addition to the output for partners in the form of understanding and ability to determine the cost of goods sold, selling price, and techniques for preparing simple financial reports for UMKM. Furthermore, a report on the implementation of ABDIMAS can be prepared which is published through national seminars within the scope of ABDIMAS or publications in national journals. The implementation method of this service is by conducting online training for partner leaders.Kegiatan Abdimas ini merupakan permintaan dari mitra, yaitu UMKM Dapur Pipit yang bergerak di bidang usaha kuliner dengan produk unggulan puding.   Meskipun kegiatan dari mitra telah berjalan, namun pimpinan mitra merasakan masih kurang tepatnya strategi penentuan harga yang selama ini dijalankan serta bagaimana pengolahan keuangan yang seharusnya dilakukan.  Mitra mengharapkan adanya suatu pelatihan terkait bagaimana melakukan pengelolaan keuangan yang baik dan benar agar tercapai suatu pengelolaan keuangan yang ideal.  Mitra juga menyampaikan keinginan untuk dapat memahami penentuan harga pokok produksi, harga jual, dan bagaimana pengelolaan keuntungan yang diperoleh.   Tim abdimas menawarkan untuk memberikan solusi berupa pelatihan perhitungan harga pokok penjualan dan harga jual sebagai langkah awal pengelolaan keuangan dari UMKM yang telah berjalan selama ini.  Luaran dari kegiatan abdimas ini adalah selain luaran bagi mitra berupa pemahaman dan kemampuan menentukan harga pokok penjualan, harga jual, dan teknik penyusunan laporan keuangan sederhana bagi UMKM.  Lebih lanjut dapat disusun suatu laporan pelaksanaan abdimas yang dipublikasikan melalui seminar nasional dalam lingkup abdimas atau publikasi pada jurnal nasional abdimas.  Metode pelaksanaan dari abdimas ini adalah dengan dilakukan pelatihan secara daring pada pimpinan mitra. 

Numerical model of the hydrowave laboratory for studying the interaction of sea waves with hydrotechnical structures

2019 ◽  
pp. 86-105
Author(s):  
Игорь Сергеевич Нуднер ◽  
Константин Константинович Семенов ◽  
Владимир Валентинович Лебедев ◽  
Гаяз Салимович Хакимзянов ◽  
Юрий Николаевич Захаров
Keyword(s):  
Numerical Model ◽  
Numerical Algorithms ◽  
Physical Modelling ◽  
Hydraulic Engineering ◽  
Laboratory Research ◽  
Design Solution ◽  
Hydraulic Structures ◽  
Sea Waves ◽  
Effective Use ◽  
The Cost

Рассмотрены вопросы, связанные с построением и областью применения численной модели гидроволновой лаборатории как инструмента, позволяющего в некоторых ситуациях отказаться от физического моделирования и заменить его численным, удешевить и ускорить ряд этапов проектных работ в гидротехническом строительстве. Представлены математические модели и численные алгоритмы, которые могут войти в состав численной лаборатории и использоваться для численного моделирования процессов генерации поверхностных волн, их распространения и взаимодействия с прибрежными и морскими сооружениями. Перечислены требования к программному обеспечению численной модели гидроволновой лаборатории, выполнение которых позволит эффективнее использовать этот инструмент инженерами-гидротехниками при проектировании гидротехнических сооружений. In the design of hydraulic structures and facilities of the coastal infrastructure, one of the main methods of confirming the claimed characteristics of the constructed facilities is the implementation of physical modelling in special hydrowave laboratories. However, the use of physical modelling as a tool for determining the most rational characteristics and parameters of hydraulic structures is very limited due to the high cost and, as a rule, the high complexity of the relevant studies. For this reason, it is virtually impossible to resort to this type of study in situations where a significant number of different project options need to be sorted out. The way out of the situation is the use of numerical modelling methods that allow you to choose the most suitable option. In fact, there is a need for a numerical model of the hydrowave laboratory, which allows abandoning the physical modelling in appropriate situations and replacing it with a numerical one. In this case, it will be possible to achieve important advantages: to reduce the cost and speed up the process of choosing the rational parameters of the design solution in hydraulic engineering, to give sufficient justification for the decision before its final verification by physical modelling. Thus, the combination of numerical studies of the proposed design solutions and physical modelling of the final result in order to confirm compliance with the requirements meets the needs of design studies in hydraulic engineering. In this paper, we consider the issues related to the construction and the domain of the numerical model of the hydrowave laboratory, as a tool that allows in some situations to abandon the physical modelling and replace it with a numerical one. Mathematical models and numerical algorithms that can be included in the numerical laboratory and used for numerical simulation of the processes of generation of surface waves, their propagation and interaction with coastal and marine structures are presented. The requirements are given for the software of the numerical model of the hydrowave laboratory, the implementation of which will ensure the effective use of this tool by hydraulic engineers in the design of hydraulic structures. Examples of successful use of mathematical technology to improve the efficiency of laboratory research are given.

scholarly journals A Study on Interaction between Overfall Types and Scour at Bridge Piers with a Moving-Bed Experiment

Water ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 152
Author(s):  
Wei-Lin Lee ◽  
Chih-Wei Lu ◽  
Chin-Kun Huang
Keyword(s):  
Large Scale ◽  
River Flow ◽  
Extreme Event ◽  
Bridge Pier ◽  
Bridge Piers ◽  
Flow Conditions ◽  
Moving Bed ◽  
Directional Flow ◽  
Scour Hole ◽  
Additional Protection

River slopes can be changed due to an extreme event, e.g., a large-scale earthquake. This can uplift a riverbed greatly and thereby change the behavior of the river flow into a free or submerged overfall. Corresponding damage, including extreme erosion, on bridge piers located in the river can take place due to the aforementioned flow conditions. A reconstructed bridge pier in the same location would also experience a similar impact if the flow condition is not changed. It is important to identify these phenomena and research the mechanism in the interaction between overfall types and scour at bridge piers. Therefore, this paper is aimed at studying a mechanism of free and submerged overfall flow impacts on bridge piers with different distances by a series of moving-bed experiments. The experiment results showed clearly that bridge pier protection requires attention particularly when the pier is located in the maximum scour hole induced by the submerged overfall due to the z directional flow eddies. In many other cases, such as when the location of the bridge pier was at the upstream slope of a scour hole induced by a flow drop, a deposition mound could be observed at the back of the pier. This indicates that, while a pier is at this location, an additional protection takes place on the bridge pier.

scholarly journals COMPARISON OF METHOD WORK IMPLEMENTATION IMPROVEMENT OF SLOPE STABILITY IN TERMS OF COST AND TIME

Neutron ◽  
2020 ◽  
Vol 20 (01) ◽  
pp. 81-90
Author(s):  
Irriene Indah Susanti ◽  
Anis Eka Aprianti
Keyword(s):  
Slope Stability ◽  
Direct Observation ◽  
Slope Angle ◽  
Advantages And Disadvantages ◽  
Implementation Method ◽  
Comparative Results ◽  
The Cost

Rampa street - Poriaha / Mungkur (WINRIP) is one location that has a slope angle on its slopes prone to landslides, causing damage to some roads. Based on these conditions, the Ministry PUPR slope handling project launched on this road. In practical improvements slope stability was conducted using three methods: manlift, hanging platforms and scaffolding. All three methods have their advantages and disadvantages in terms of both cost and time. To obtain the results of the comparison of cost and time to do the direct observation and study of literature, the comparative results obtained on the cost and time to get the method implementation in accordance with needs. From the three methods, the lowest cost and the fastest duration of the results implementation method using manlift with cost of Rp 1,557,623,470 and duration of work 29 days

scholarly journals REMEDIAL WORKS AND REPAIRS OF HISTORICAL BRIDGE IN PRAGUE

2017 ◽  
Vol 12 (4) ◽  
pp. 264-269
Author(s):  
Iva Broukalová ◽  
Vladimír Křístek
Keyword(s):  
River Flow ◽  
Historical Background ◽  
Bridge Piers ◽  
Second Stage ◽  
Construction Techniques ◽  
Wide Range ◽  
Historical Masonry ◽  
To Come ◽  
Harmful Effects ◽  
Structural Aspects

The recent reconstruction of the historical masonry Charles Bridge in Prague was designed with respect to original conception, materials and ancient construction techniques. The repair and remedial works were based on analysis of the multi-decade response of the bridge, diagnosis, and assessment of damages, failures and deterioration processes related to materials, environment, climate, structural arrangement and detailing regarding heritage, historical and structural aspects. The gentle way of remedial works with minimal intervention in the loadbearing structure is a result of a wide-range discussion on appropriate strategies for refurbishment, restoration, conservation and preservation corresponding to location and significance of the historic bridge. The reconstruction increased durability and provides a long service life of the historical bridge and protection against harmful effects for many years to come. The article outlines historical data, consequences of the controversial reconstruction in the second half of the last century. Effects of river flow, temperature, and moisture and their influence on needful repairs are considered. Stages of reconstruction are presented; in the first stage, strengthening of foundations of bridge piers is described including historical background and impact of river flow on subgrade of piers. Ways of repairs and reconstruction of the bridge deck, its draining, and other related bridge elements are shown as a part of the second stage of reconstruction.

scholarly journals Evaluation of Urban Flood Control Project –Case Study at Bendung Watershed in Palembang City, Indonesia–

2021 ◽  
Vol 6 (1) ◽  
pp. 1
Author(s):  
Rian Dinata
Keyword(s):  
Flood Control ◽  
River Flow ◽  
Small Rivers ◽  
Urban Flood ◽  
Main River ◽  
Flood Damages ◽  
Cost And Benefit Analysis ◽  
The Cost ◽  
The City

Abstract:  Palembang City locates on a lowland where the altitude is between 12 and 30m above sea level. There are many small rivers that flow into a main river, Musi river. Due to the topographical configuration and a seasonal heavy rainfall, those rivers had been overflowed and the city had an inundation disaster. Bendung watershed is one of the nineteen watersheds in Palembang City, and the watershed also experiences the inundation disaster frequently due to the flood caused by a poor river maintenance and drainage system.The local government of Palembang City has applied some flood control projects such as a normalization project to reduce the flood damages. These measures checked the river flow over the dike, but some areas still suffered from the flood damages due to their topography. Based on the current situation, this study evaluates the efficiency of the existing normalization project in this watershed to find a solution that reduces the flood in those areas. Furthermore, this study investigates the feasibility of infiltration-well system to overcome the flood in those areas. The feasibility study includes the cost and benefit analysis to realize the infiltration-well system for easing the inundation problem.Abstrak: Kota Palembang terletak di dataran rendah dengan ketinggian antara 12 sampai 30m di atas permukaan laut. Karena konfigurasi topografi dan curah hujan musiman yang tinggi, sebagian Kota Palembang sangat rentan terhadap genangan dan bencana banjir . DAS Bendung merupakan salah satu dari sembilan belas DAS yang ada di Kota Palembang, dan DAS tersebut juga sering mengalami bencana genangan akibat banjir yang disebabkan oleh sistem drainase yang buruk.Pemerintah Daerah Kota Palembang telah menerapkan beberapa proyek pengendalian banjir seperti proyek normalisasi sungai. Proyek ini cukup sukses mencegah air sungai bendung meluap melewati tanggul sungai tersebut, tetapi beberapa lokasi yang jauh dari sungai bendung masih mengalami genangan karena topografinya. Berdasarkan kondisi ini, studi ini mengevaluasi efisiensi proyek normalisasi di DAS ini untuk mencari solusi yang dapat mengurangi banjir di wilayah tersebut. Selanjutnya studi ini mengkaji kelayakan sistem sumur resapan untuk mengatasi banjir di wilayah tersebut. Studi kelayakan lain meliputi analisis biaya dan manfaat sistem sumur resapan untuk mengatasi masalah genangan. 

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