33407
2304-6295
Construction of Unique Buildings and Structures
7
82
2019
1-37
RAR
RUS
7-13
Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation
Artun
Aytug
aytugartun@gmail.com
St. Petersburg, Russian Federation
R-6085-2016
57196054199
0000-0002-0840-6828
Peter the Great St. Petersburg Polytechnic University
Radaev
Anton Evgenevich
TW-inc@yandex.ru
St. Petersburg, Russian Federation
6508255564
0000-0002-3054-1786
Peter the Great St. Petersburg Polytechnic University
Badenko
Vladimir Lvovich
vbadenko@gmail.com
St. Petersburg, Russian Federation
Minimizing Earthwork Volumes by Optimizing Vertical Alignment with Linear Programming Algorithm
Earthwork cost is one of the major cost items (approximately 25% of the construction costs) in road construction projects. The amount of earthwork volumes therefore earthwork cost, mostly depends on the geometry of the road vertical alignment. We can conclude that an optimized vertical alignment has a profound impact on earthwork costs. In this research paper, we minimize earthwork cost by optimizing vertical alignment with the help of developed linear programming algorithm. Proposed linear programming algorithm is based on simplex method with branch and bound improvement which optimizes vertical alignment in piece-wise manner. After the optimization of vertical alignment, earthwork volumes are calculated in the road design software with average end area volume calculation method. We provide numerical results which include earthwork volumes and cost improvements over preliminary design.
10.18720/CUBS.82.1
69
Earthwork
Optimization models
Linear Programming
Road Construction
Vertical Alignment
https://unistroy.spbstu.ru/article/2019.82.1/
872_2.pdf
RAR
RUS
14-21
Peter the Great St. Petersburg Polytechnic University
Taheri Fard
Ali Reza
alireza_taherifard@yahoo.com
St. Petersburg, Russian Federation
Peter the Great St. Petersburg Polytechnic University
Andrianova
Maria Yurievna
maandrianova@yandex.ru
St. Petersburg, Russian Federation
Application of Optical Density in Evaluating Performance of Evolutionary Modified Perlite in Water Reclamation
Water treatment efficiency of several filter media such as perlite, modified (silicated) perlite, zeolite, and sand were studied on wastewater. This study contains 2 distinct experiments which the first one emphasize on the modified perlite’s performance in removing turbidity which has been gone through 3 phases including low turbidity model water, mid turbidity, and high turbidity model water; the second experiment underlines the differentiation between 3 evolutionary material based on perlite which undergoes the filtration process with certain turbid model water. It was dedicated that modified perlite removed more than 90% of turbidity and it functions better than other materials with high turbidity (more than100 NTU). The experiments have been conducted with sodium silicate perlite, normal perlite, and synthetic zeolite perlite in order to determine the optimized material which is able to be substituted with perlite in the filtration process.
10.18720/CUBS.82.2
69
Water Treatment
Filtration
Modified Perlite
Optical density
wastewater
https://unistroy.spbstu.ru/article/2019.82.2/
872_1.pdf