scholarly journals THE USE OF EXPLORATORY TUNNELS AS A TOOL FOR SCHEDULING AND COST ESTIMATION

2007 ◽  
Vol 13 (4) ◽  
pp. 280-287 ◽  
Author(s):  
Ahmed Abdallah
Keyword(s):  
Cost Estimation ◽  
High Speed ◽  
Deterministic Model ◽  
Management Tool ◽  
High Speed Railway ◽  
Project Data ◽  
The Cost ◽  
Double Track ◽  
Total Project ◽  
Structural Aspects

Exploratory tunnels are commonly used for examining the geotechnical and structural aspects of proposed tunnel alignments. This paper explores the utilisation of exploratory tunnels as a project management tool for estimating the cost and duration of construction for the entire project. Data were collected from the Kaponig 2,75 kilometers exploratory tunnel, a part of a double‐track high‐speed railway development in Austria. This knowledge and experience was used to evaluate the risks associated with design details for the final tunnel enlargement (alignment and grade, support requirements and excavation methods). A deterministic model based on Monte Carlo simulation was developed capable of predicting potential outcomes of the total project in terms of cost, duration and their associated probabilities.

Does opening high-speed railways affect the cost of debt financing? A quasi-natural experiment

2020 ◽  
Vol 10 (4) ◽  
pp. 473-496
Author(s):  
Hongling Guo ◽  
Keping Wu
Keyword(s):  
High Speed ◽  
Geographical Location ◽  
Debt Financing ◽  
Cost Of Debt ◽  
High Speed Railway ◽  
Content Type ◽  
Financing Cost ◽  
Debt Market ◽  
The Cost ◽  
The Impact

PurposeThis study aims to investigate how opening high-speed railways affects the cost of debt financing based on China's background.Design/methodology/approachUsing panel data on Chinese listed firms from 2008 to 2017, this study constructs a quasi-natural experiment and adopts a difference-in-difference model with multiple time periods to empirically examine the relation between the high-speed railway openings and debt financing cost.FindingsOur results show that opening high-speed railways reduces the cost of debt financing, and this negative correlation is more significant in non-state firms, firms with weaker internal control, and firms that hire non-Big Four auditors. Besides, we explore the impact mechanisms and find that opening high-speed railways improves analyst attention, institutional investor participation, and information disclosure quality, which in turn lowers the cost of debt financing.Research limitations/implicationsThe results imply that the opening of high-speed railways helps to alleviate the information asymmetry and adverse selection between firms and creditors and ultimately reduces the cost of corporate debt financing.Practical implicationsThis paper can inform firms and stakeholders about the impact of opening high-speed railways on debt financing cost: it improves the information environment, reduces the geographical location restrictions of debt financing, ensures the reasonable pricing of corporate debt, and thus promotes the healthy and sound development of the debt market.Originality/valueThis paper provides theoretical support and empirical evidence for the impact of infrastructure construction on the information environment of the debt market in China, which enriches the research on the “high-speed railway economy.” In addition, as an exogenous event, the opening of high-speed railways instantly shortens the time distance between firms and external stakeholders, which gives us a natural environment to conduct empirical research, thus providing a new perspective for financial research on firms' geographical location.

scholarly journals Innovative Geoinformation Systems for the Design of Communication Paths

2020 ◽  
Author(s):  
Yevheniia Ugnenko ◽  
Olha Tymchenko ◽  
Elena Uzhviieva ◽  
Nataliia Sorochuk ◽  
Gintas Viselga
Keyword(s):  
High Speed ◽  
Railway Network ◽  
High Speed Railway ◽  
Passenger Traffic ◽  
Gradual Introduction ◽  
Railway System ◽  
Basic Characteristics ◽  
The Cost ◽  
Cost Of Construction ◽  
Communication Paths

The article analyses the volume of passenger traffic from 1990 to 2019 for land, water and air transport. From the materials obtained and the experience of the networks of European and world high-speed railways, goals are set. High-speed lines designed exclusively for passenger traffic. This moment plays an important role in reducing the cost of construction, increasing the market and economic profitability. According to the data from the State Statistics Service of Ukraine, it is possible to calculate the passenger flow based on the known parameters for 2020–2032 in the direction of Kiev–Lviv. The design of high-speed lines should meet general requirements aimed at satisfying the basic characteristics of a high-speed railway system, which works in conjunction with the European High-Speed Railway network. The compatibility of the parameters of high-speed lines with the parameters of traditional lines is part of the operational requirements for the gradual introduction of a network of high-speed railways. Possible scenarios to achieve the required compatibility should cover all subsystems.

scholarly journals The Analysis of Cost Estimation using Cost Significant Model on Bridge Construction in South Sulawesi

2021 ◽  
Vol 921 (1) ◽  
pp. 012073
Author(s):  
E Aprianti ◽  
S Hamzah ◽  
M A Abdurrahman
Keyword(s):  
Regression Analysis ◽  
Cost Estimation ◽  
Construction Projects ◽  
Steel Frame ◽  
Bridge Construction ◽  
South Sulawesi ◽  
The Cost ◽  
Total Project Cost ◽  
Total Project ◽  
Significant Model

Abstract One of the fundamental problems faced by the province of South Sulawesi is the factor of accessibility, so the role of bridges is quite important. For this reason, the budget planning for standard bridge construction projects also needs to be efficient in terms of preparation and accurate in terms of budget. The Cost Significant Model is one of the total construction cost estimation models that relies more on the prices that have the most influence on the total project cost as the basis for estimation. In general, this study uses data from steel frame bridge construction projects in South Sulawesi Province to formulate a mathematical model with linear regression analysis so that it can be used in the process of estimating similar projects going forward. The Estimation Model which is formed from the regression analysis and the Cost Significant Model in this study, namely; Y = 3.884 (X7) + 0.989 (X8) - 65515.372. With; Y = Estimated Total Cost (Rp/m); X7 = Reinforcement Work Cost (Rp/m); X8 = Steel Frame Structure Work Cost (Rp/m). Where this model can explain 99.7% of the total project cost with a cost model factor of 1.038. The level of accuracy (percentage error estimate) of the estimation results of the Cost Significant Model in this study ranges from - 1.46% to +2.45%.

Study on Safety Measures for Construction of Foundation Pit close to Existing Railway Lines

2012 ◽  
Vol 178-181 ◽  
pp. 1279-1286 ◽  
Author(s):  
Xiao Hui Zhang ◽  
Quan Mei Gong ◽  
Shun Hua Zhou
Keyword(s):  
High Speed ◽  
Cost Effective ◽  
Structure Design ◽  
Foundation Pit ◽  
High Speed Railway ◽  
Reinforcement Measures ◽  
Railway Operation ◽  
The Cost ◽  
Effective Reinforcement ◽  
The Impact

The finite-element method is adopted to analyze the impact of foundation pit construction on close-by railway lines, and related measures are studied to ensure the safety of railway operation during the pit construction. Eventually, cost-effective reinforcement method is recommended, therefor providing a reference for construction of similar foundation pit close to railway lines to determine reinforcement method. The conclusions indicate that under the existing structure design and basal reinforcement design of the foundation pit, the largest settlement of high-speed railway lines is 23.48mm, which does not meet the relative requirements. To reduce the settlement, three rows of high pressure jet grouting piles reinforcement outside the foundation pit and 0.15m away from waterproof curtain is recommended, and 18.0m is considered as the cost-effective reinforcement depth. With the effect of the proposed reinforcement measures, the largest settlement magnitude of high-speed railway subgrade is reduced by 25% to 14.0mm, which meets the relative requirement.

New Approach in Cost Structuring of High Speed Hard Turning

2011 ◽  
Vol 264-265 ◽  
pp. 1003-1008 ◽  
Author(s):  
Muataz H.F. Al Hazza ◽  
Erry Yulian Triblas Adesta
Keyword(s):  
Cost Estimation ◽  
High Speed ◽  
Hard Turning ◽  
Cost Model ◽  
New Technology ◽  
Cost Estimating ◽  
New Approach ◽  
Cost Drivers ◽  
Optimum Solution ◽  
The Cost

Cost structuring of new technology is a critical mission which needs to be developed systematically to get accurate cost estimation. In this research a new approach was proposed and developed for cost structuring a new process. Cost modeling roadmap was proposed to guide the development of genetic cost model by integrating different cost estimating methods and supporting the optimum solution by using statistical techniques in modeling the cost in high speed hard turning, then by building logical relationships between the different effective variables through three levels of cost drivers; main drivers, process and technical drivers and final drivers. Finally a matlab model was developed for simulating the final cost drivers to study the effect of different parameters on the cost drivers.

scholarly journals Cost Estimation Process of Remote Sensing Satellites

2021 ◽  
Vol 11 (2) ◽  
pp. 78-85
Author(s):  
Dechamma K K ◽  
◽  
Mohith C G ◽  
Suma Mirji ◽  
Rahul Kumar ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Regression Analysis ◽  
Cost Estimation ◽  
Deterministic Model ◽  
Knowledge Building ◽  
Cost Model ◽  
Technical Knowledge ◽  
Building Relationships ◽  
Technical Parameters ◽  
The Cost

Forecasting cost of satellites is not a recent development in space agencies, they were in practice from the beginning using traditional methods. The attempt to make it simpler, quicker and accurate; established the path to build a model by incorporating statistics, technology and technical knowledge. Building relationships between satellite cost and the technical parameters affecting them directly or indirectly became the basis of the model. The building of the cost model is more vexing than it looks. It requires data to perform regression analysis, which can be linear or nonlinear along with transformations. This paper also specifies the significance of the uncertainty impacting the cost associated with the technical parameters and the method of estimation. The overall model is mapped into three parts; the manpower and facility cost model being the deterministic bottom-up model and the combination of probabilistic and deterministic model for satellite cost.

scholarly journals New method for allocating high-speed railway infrastructure costs among train types

2021 ◽  
Vol 233 ◽  
pp. 01137
Author(s):  
Chao Ji ◽  
Chenyu Xu
Keyword(s):  
High Speed ◽  
Cost Allocation ◽  
Rapid Development ◽  
Environmental Cost ◽  
Cost Calculation ◽  
High Speed Railway ◽  
Railway Infrastructure ◽  
Calculation Results ◽  
Rate Method ◽  
The Cost

With the rapid development of China's high-speed railway (HSR), there are also many problems. For example, in the classification and calculation of HSR transportation costs, there is a lack of reasonable cost statistical methods. There are many types of high-speed train currently running on HSR (mainly G and D trains). There are differences in the speed, load and energy consumption of different types of trains. The resulting infrastructure usage costs also vary. However, all train costs are classified and calculated uniformly in practice. This paper proposes the expenditure rate method of the transport process allocating the infrastructure use costs among types of trains. Based on data from the Beijing-Shanghai high-speed railway, the cost of infrastructure is calculated, and the calculation results can reasonably reflect the cost allocation among types of trains. It makes the cost calculation of high-speed railway more accurate and lays a foundation for environmental cost calculation.

scholarly journals Estimation of conditions of using combined single-track and double-track railways at high-speed traffic

2018 ◽  
Vol 216 ◽  
pp. 02010 ◽  
Author(s):  
Alexei Dmitrenko ◽  
Sergei Karasev ◽  
Alexandra Kalidova ◽  
Dmitry Sivitsky
Keyword(s):  
Simulation Modeling ◽  
High Speed ◽  
Capital Investments ◽  
Single Track ◽  
Railway Transportation ◽  
Relevant Issue ◽  
Important Condition ◽  
High Speed Railway ◽  
Double Track ◽  
Track Line

An important condition when arranging high-speed railway transportation with insignificant traffic is saving of capital investments in construction of new lines or the reconstruction the existing ones. Development of methods for multi-criteria estimation of the possibility of using fully single-track blocks on a line with high-speed traffic, as well as single-track blocks with double-track inserts, is a relevant issue. The purpose of the study is to develop the criteria and the method for estimation of the feasibility of using single-track elements on a line with high-speed traffic. Methods of simulation modeling, mathematical statistics, regression analysis were used. A method that includes estimation of the technological conditions of using single-track elements on a line with high-speed traffic instead of double-track blocks was developed. The method can be used for multi-criteria optimization of the configuration of a combined single-track and a double-track line using single-track elements in high-cost areas.

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