scholarly journals Feasibility Study Stage of Highway Engineering in Mountainous Area Compilation of Estimation Quantity Table of Temporary Works

CONVERTER ◽  
2021 ◽  
pp. 880-886
Author(s):  
Wei Zhang, Ru Mou, Peng Yang
Keyword(s):  
Feasibility Study ◽  
Practical Work ◽  
Basic Method ◽  
Mountainous Area ◽  
Safety Measures ◽  
Highway Engineering ◽  
Method Of Calculation ◽  
Access Road ◽  
Geological Conditions ◽  
Highway Project

Reasonable estimation of the project quantity in the feasibility study stage of mountain highway project is one of the basis for the preparation of investment estimation. Combined with the practical work for many years, the content and method of the temporary project, safety measures and other engineering quantity table in feasibility study stage of the highway project in Chongqiu District of mountain are introduced. Taking the calculation of the temporary project of Ningxiang expressway as an example, the basic method of calculation of the maintenance and restoration of the construction access road, the bridge and the original road in mountainous area is analyzed. The author concludes that the influence of geological conditions, topography and original traffic facilities should be considered comprehensively when preparing the temporary engineering quantity table.

scholarly journals Feasibility Study Stage of Mountain Highway Engineering Based on Empirical Analysis Method Estimation of Subgrade Engineering Quantity

CONVERTER ◽  
2021 ◽  
pp. 887-895
Author(s):  
Wei Zhang, Shanshan Zhang, Xiaoyong Yao
Keyword(s):  
Empirical Analysis ◽  
Feasibility Study ◽  
Construction Project ◽  
Practical Work ◽  
Analysis Method ◽  
Mountainous Areas ◽  
Engineering Construction ◽  
Highway Engineering ◽  
Engineering Construction Project ◽  
The Empirical Analysis

In the feasibility study stage of highway engineering construction project, it is one of the bases for compiling investment estimation to reasonably estimate the quantity of subgrade works. Combined with years of practical work, this paper introduces the contents and compilation methods of subgrade works in the feasibility study stage of Highway Engineering in mountainous and hilly areas. Taking 11 specific projects as examples, this paper analyzes the specific application of empirical analysis method, and concludes that the empirical analysis method can be applied to the estimation of highway subgrade engineering quantity in mountainous areas in the feasibility study stage

scholarly journals Calculation of Pavement Engineering Quantities of Mountainous Highway in Feasibility Study Stage

CONVERTER ◽  
2021 ◽  
pp. 873-879
Author(s):  
Wei Zhang, Xiaoyong Yao, Shanshan Zhang
Keyword(s):  
Feasibility Study ◽  
Retaining Wall ◽  
Engineering Construction ◽  
Highway Engineering ◽  
Geological Conditions ◽  
Pavement Engineering ◽  
Pavement Structure ◽  
Engineering Construction Project ◽  
Structure Layer ◽  
Selection Of

The reasonable estimation of the number of pavement works in the feasibility study stage of highway engineering construction project is one of the basis for the preparation of investment estimation. The selection of pavement structure layer and the calculation of thickness, the calculation of different terrain and pavement area is the main content of highway pavement quantity calculation in mountainous and hilly area. It is of great significance to select the correct calculation method according to different geological conditions. Through 10 engineering cases analysis, the paper analyzes the thickness and area calculation of the pavement structure of the mountain road. It is concluded that the pavement structure layer can be in the form of subbase + base + seal + surface layer. The influence of shoulder, subgrade retaining wall and middle separation zone should be considered in the calculation of pavement area.

scholarly journals Support System for Tunnelling in Squeezing Ground of Qingling-Daba Mountainous Area: A Case Study from Soft Rock Tunnels

2019 ◽  
Vol 2019 ◽  
pp. 1-17 ◽  
Author(s):  
Xiuling Wang ◽  
Jinxing Lai ◽  
Rodney Sheldon Garnes ◽  
Yanbin Luo
Keyword(s):  
Support System ◽  
Strong Support ◽  
Mountainous Area ◽  
Squeezing Ground ◽  
Tunnel Face ◽  
Support Design ◽  
Tunnel Support ◽  
Geological Conditions ◽  
Rock Tunnels

Tunnelling or undertaking below-ground construction in squeezing ground can always present many engineering surprises, in which this complicated geology bring a series of tunnelling difficulties. Obviously, if the major affecting factors and mechanism of the structure damage in these complicated geological conditions are determined accurately, fewer problems will be faced during the tunnel excavation. For this study, reference is made to four tunnel cases located in the Qingling-Daba mountainous squeezing area that are dominated by a strong tectonic uplift and diversified geological structures. This paper establishes a strong support system suitable for a squeezing tunnel for the purpose of addressing problems exhibited in the extreme deformation of rock mass, structure crack, or even failure during excavation phase. This support system contains a number of temporary support measures used for ensuring the stability of tunnel face during tunnelling. The final support system was constructed, including some key techniques such as the employment of the foot reinforcement bolt (FRB), an overall strong support measure, and more reserved deformation. Results in this case study showed significant effectiveness of the support systems along with a safe and efficient construction process. The tunnel support system proposed in this paper can be helpful to support design and provide sufficient support and arrangement before tunnel construction in squeezing ground.

scholarly journals Studies on the impact of the technical characteristics of local roads on road safety

2019 ◽  
Vol 262 ◽  
pp. 05006
Author(s):  
Stanisław Gaca ◽  
Mariusz Kieć
Keyword(s):  
Road Safety ◽  
Road Traffic ◽  
Road Accidents ◽  
Safety Measures ◽  
Accident Prediction ◽  
The Road ◽  
Access Road ◽  
Local Roads ◽  
On The Road ◽  
The Impact

Local roads (district roads) constitute an important part of the road network in Poland, making up around 29.7 % (124,945 km) of all public roads. In 2017, 10,578 accidents, which is 35.7% of all accidents in Poland, took place on local roads. These roads are used primarily by regular users who are very familiar with the defects of these roads. This means that the effects of the low technical standard of local roads and the insufficient number of road traffic devices on the safety on the road can be partly compensated for by the fact that drivers adjust their behaviour to the conditions on the road. This hypothesis can be verified through developing dependency models of road safety measures of local roads’ and technical characteristics. The article presents the research carried out based on regression models of accident prediction. The models were developed with the use of the data on the road surroundings arrangement (built-up areas, access), road condition and the extent of signposting, including data on speed limits and overtaking as well as risk exposure variables. Due to the incomplete data on accidents and the small number of accidents, different approaches to the modelling of the number of road accidents were applied.

scholarly journals Rock physics attribute analysis for hydrocarbon prospectivity in the Eva field onshore Niger Delta Basin

2020 ◽  
Vol 10 (8) ◽  
pp. 3127-3138
Author(s):  
Alexander Ogbamikhumi ◽  
Nosa Samuel Igbinigie
Keyword(s):  
Feasibility Study ◽  
Niger Delta ◽  
Poisson Ratio ◽  
Rock Physics ◽  
Plot Analysis ◽  
Attribute Analysis ◽  
Geological Conditions ◽  
Niger Delta Basin ◽  
Ratio Versus

Abstract Direct hydrocarbon indicator (DHI) expressions observed on seismic could arise due to various geological conditions. Such expression could lead to misinterpretation as hydrocarbon presence if not properly analyzed. This study employs rock physics attributes analysis to evaluate an identified prospect in the undrilled area of the studied reservoir. Prospect identification was actualized by analyzing structural and amplitude maps of the reservoir, which revealed a possible roll over anticline at both the exploited and prospective zone, with a very good amplitude support that conforms to structure. Well-based cross-plot analysis adopted four cross-plot techniques for feasibility study to test the applicability of rock physics for prospect evaluation in the field; Lambda-Rho versus Lambda-Rho/Mu-Rho ratio; Mu-Rho versus Lambda-Rho; and Poisson Ratio versus P-impedance. The result presented Poisson ratio, Lambda-Rho and Lambda/Mu-Rho ratio as good fluid indicator and Mu-Rho as a viable lithology indicator. As such, they were selected for seismic-based attribute and cross-plot analysis to validate the identified prospect. The results from seismic-based analysis showed consistency in the expression of the analyzed attribute at both the exploited and prospective zone. The seismic-based cross-plot analysis result was similar to the well-based analysis and was able to confirm that the observed amplitude expression in the exploited zone is an indication of hydrocarbon-bearing sand.

scholarly journals Estimation of daily runoff coefficient of the pervious surfaces for the climate conditions of the city of Lviv

2020 ◽  
Vol 5 (3) ◽  
pp. 136-142
Author(s):  
Volodymyr Zhuk ◽  
◽  
Lesya Vovk ◽  
Pavlo Mysak ◽  
◽  
...  
Keyword(s):  
Return Period ◽  
Daily Rainfall ◽  
Curve Number ◽  
Runoff Coefficient ◽  
Rainfall Events ◽  
Climate Conditions ◽  
Method Of Calculation ◽  
Geological Conditions ◽  
The City ◽  
Maximum Daily Rainfall

The method of calculation of daily runoff coefficients based on the SCS USDA curve number method is presented in this paper. The calculated values ​​of daily runoff coefficients for climatic and geological conditions of the city of Lviv for maximum daily rainfall events with a return period of 0.1 – 5 years are obtained.

Design and Application of Rock Bolt Foundation in Mountain Cable Crane

2014 ◽  
Vol 578-579 ◽  
pp. 745-750
Author(s):  
Jin Sheng Lei ◽  
Xue Ting Cao ◽  
You Wei Zeng ◽  
Fei Liu
Keyword(s):  
Bearing Capacity ◽  
Design Theory ◽  
Failure Modes ◽  
Effective Means ◽  
Reference Value ◽  
Rock Bolt ◽  
Mountainous Area ◽  
Geological Conditions ◽  
Cable Crane ◽  
Force Calculation

Restricted by the construction environment, the cable crane is an effective means to resolve the transportation of materials and component in the mountainous area. Compared with traditional gravity anchor base, cable crane fixed on the rock bolt foundation can take advantage of the bearing capacity of bedrock, and the construction method is simple and of good economic benefit. With the effect of the construction methods, design theory of geological conditions, and other factors, however, force calculation is much complicated. By analyzing the failure modes of rock bolt foundation, anchor foundation bearing capacity factors and multi anchorage effect on anchoring force, we studied the design process of rock bolt foundation, geotechnical strength parameters and the safety coefficient of reference value. Further, a construction way is proposed to improve the basic bearing capacity of rock bolt. Combing with engineering examples, we also demonstrated the security and reliability of the design method .

Study on the Calculation Method of Light Shed on Rockfall Impact Protection

2014 ◽  
Vol 1065-1069 ◽  
pp. 792-797
Author(s):  
Xin Lou ◽  
Yi Tang Zhou ◽  
Jian Rong Yang ◽  
Zhi Qiang Chen
Keyword(s):  
Engineering Design ◽  
Mountainous Area ◽  
Calculation Methods ◽  
Rockfall Hazard ◽  
Geological Conditions ◽  
Practical Engineering ◽  
Impact Protection ◽  
Motion Characteristics ◽  
The Impact ◽  
Protection Engineering

With the increase of our construction in the mountainous area, rockfall hazard also increasing seriously. In this paper, the rockfall prone section is determined through understand the engineering geological conditions cause falling rock; then to predict the impact of the range of rockfall movement, the motion characteristics of rockfall is studied, and the calculation methods of rockfall impact is given; Finally, combine with a practical engineering, the rockfall collision impact theoretically and the practically are compared. The result shows that this study may provide a useful approach for protection engineering design.

Structural Type Selection for Long-Span Bridges in Mountain Area

2012 ◽  
Vol 256-259 ◽  
pp. 1596-1600
Author(s):  
Dong Liang ◽  
Chang Rong Yao ◽  
Sai Zhi Liu
Keyword(s):  
Conceptual Design ◽  
Structural Type ◽  
Mountainous Area ◽  
Construction Technology ◽  
Mountain Area ◽  
Long Span Bridges ◽  
Long Span ◽  
Type Selection ◽  
Geological Conditions ◽  
Bridge Structures

As the western region is a mountainous area with geology complicated geological conditions, the proportion of bridges and tunnels is bigger. Based on the characteristic of mountainous route and long-span bridges, this paper discussed the conceptual design of mountainous bridges. Firstly, this paper analyzes the characteristic of mountainous long-span bridges and proposed some fundamental principles to design long-span bridges. After the comparison of the main bridge structures, the paper points out that the designer should select the best programs considering hydrological, geological, geomorphology, construction technology, transportation , geographical environment and social environment. The purpose of this paper is to give reference for the conceptual design of mountainous long-span bridges.

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