Discussion on Construction Technology of Signal Electrification Reconstruction Project of Existing Line Railway

2021 ◽  
Keyword(s):  
Construction Technology ◽  
Reconstruction Project

Old and New Embankment Splicing Technology in Highway Reconstruction Project

2014 ◽  
Vol 587-589 ◽  
pp. 1190-1193 ◽  
Author(s):  
Gao Zhan
Keyword(s):  
Differential Settlement ◽  
Processing Technology ◽  
Good Effect ◽  
Construction Technology ◽  
Construction Process ◽  
Treatment Technology ◽  
High Quality ◽  
Rational Use ◽  
Cutting Slope ◽  
Reconstruction Project

In order to make a better convergence of old and new roadbed,according to treatment technology about highway reconstruction project of new and old roadbed lap,we introduced the four good construction technology detailedly used in the construction process. Four kinds of processing technology can significantly reduce differential settlement caused by road diseases,and strengthen the widening subgrade integrity.The results show that the appropriate cutting slope and excavation steps, a good degree of compaction, the rational use of geosynthetic materials, the use of the use of high quality packing can make the new and old roadbed integrity, achieve good effect of design and construction and reduced the incidence of disease.

Construction Technology Urumqi Outer Ring Expressway Road Reconstruction Project Expansion

2014 ◽  
Vol 587-589 ◽  
pp. 965-970
Author(s):  
Yu Lan Cheng
Keyword(s):  
Outer Ring ◽  
Construction Technology ◽  
Original Design ◽  
Growth Trend ◽  
New Era ◽  
Ring Road ◽  
Construction Methods ◽  
Project Construction ◽  
Reconstruction Project ◽  
The City

With the continued rapid economic development in recent years, Urumqi, vehicle scale continues to expand, prompting the city traffic was a rapid growth trend, Outer Ring Road as a fast loop only existing within the city limits, borne traffic has far exceeded the original design prediction traffic volume and the actual capacity, resulting in a number of sections, interchange nodes, often made of ramp entrances become congested road, the outer ring road to solve the congestion problem, and it needs to be rebuilt to meet the expansion needs of the new era. Urumqi City East Outer Ring Expressway road expansion reconstruction project, for example, to explore the elevated expansion of the project construction methods, summarize experience in construction, hoping to provide a reference for future similar projects.

Research on Construction Technology of Shallow-Buried and Long-Span Railway Tunnel in Soft Rock

2013 ◽  
Vol 353-356 ◽  
pp. 1639-1643 ◽  
Author(s):  
Nan Qing Huang
Keyword(s):  
Present Method ◽  
Soft Rock ◽  
Construction Technology ◽  
Railway Tunnel ◽  
Long Span ◽  
Speed Up ◽  
Initial Support ◽  
Reconstruction Project ◽  
Core Soil ◽  
Economic Comparison

Based on the construction of the New Yangshi Tunnel, a section of the electrified speed-up reconstruction project in Zhe-Gan Railway, the author discusses and studies the construction technology employing annular excavation with core soil reserved method, together with the use of H175 steel frame as initial support in the shallow-buried and long-span railway tunnel in soft rock. Through the technical and economic comparison, it shows that the present method is faster, with the construction progress of 50m per month in average, and is more economical in construction than Center Diaphragm (CD) method with an investment of 4,000,000 Yuan having been saved.

scholarly journals Application of displacement synchronization automatic control jacking technology in upgrading and reconstruction project of super large aqueduct of South-to-North Water Diversion Project

2021 ◽  
Vol 248 ◽  
pp. 03040
Author(s):  
Bo Wu ◽  
Xiaolu Chen ◽  
Mingqin Zhao ◽  
Xiaomin Yang ◽  
Zhiyong Zhou
Keyword(s):  
Automatic Control ◽  
Reference Value ◽  
Water Diversion ◽  
Construction Technology ◽  
Middle Section ◽  
Linear Change ◽  
Water Diversion Project ◽  
North Water ◽  
Reconstruction Project ◽  
Jack Up

Jack-up technology is widely used in aqueduct reconstruction projects. In this paper, a self-developed displacement synchronous automatic control jack-up technology is introduced for the upgrading and reconstruction project of super large aqueduct in South-to-North Water Diversion Project. A new large span aqueduct jack-up construction technology is proposed and studied, and the key technologies of different heights of the aqueduct are discussed. During the jack-up reconstruction of the Lihe Aqueduct from Taocha Canal Head to Shahenan Canal Project in the first phase of the middle route of the South-to-North Water Transfer Project, the overall synchronous lifting of the aqueduct body was achieved by 72 cm, and then the aqueduct body was dropped proportionally. Finally, the jack-up reconstruction of the entrance section of the Lihe Aqueduct was achieved by 50 cm, and the exit section was not jack-up, and the middle section showed a linear change. The research results have a certain reference value for the reconstruction projects of similar structures with different heights at both ends.

On the Job Training (OJT) Assessment for Diploma in Construction Technology

2020 ◽  
Vol 17 (2) ◽  
pp. 29
Author(s):  
Nurhafizah Abdul Musid ◽  
Haryanti Mohd Affandi ◽  
Nurul Eizzaty Sohimi ◽  
Mohd Firdaus Mustaffa Kamal
Keyword(s):  
Attitude Change ◽  
Job Training ◽  
Change Implementation ◽  
Construction Technology ◽  
Validity And Reliability ◽  
Structured Interviews ◽  
Vocational College ◽  
Technology Students ◽  
Assessment Problems ◽  
Assessment Rubric

On Job Training (OJT) is best for skill development and attitude change. Implementation of OJT which focuses on the transition of students to working life, however with little attention given to the process of assessment in OJT. Therefore, the aim of this study is to investigate the OJT assessment problems among Construction Technology students in Malaysian Vocational College. The research design for this study uses a survey that was carried out qualitatively through semi-structured interviews among Construction Technology students, lecturers and experienced construction practitioners. From the data analysis, it has been identified that there is an inadequacy of OJT assessment rubric in assessing the skill and knowledge of the construction technology students. This has been contributed with the used of holistic rubric for the OJT assessment which has been designed to be use by every course in the Vocational College. The result also revealed that allocation of marks in the assessment rubric is not commensurate with some construct assessed and need to be reviewed. This study shows that an assessment rubric should emphasizes on specific knowledge and skills in assessing students’ competency during training program and in this case to produce competent site supervisor. In addition, a good assessment rubric should consider the tasks and marks thoroughly to avoid biasness among students. Therefore, it is suggested to carry out further study in investigating the validity and reliability of current industry’ OJT assessment rubric for the Construction Technology students.Key Words: On Job Training; Construction Technology; An assessment rubric; Competency; Validity and reliability.

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