Research of micro-pressure grouting construction technology for precast vertical member reinforcement sleeve grouting connection

2021 ◽  
Author(s):  
Shuangyang Song ◽  
Shiqi Cui ◽  
Xiaopeng Li ◽  
Jiandong Sun ◽  
Xin Lou ◽  
...  
Keyword(s):  
Construction Technology ◽  
Pressure Grouting

scholarly journals Study on the technology of grouting and reinforcing the foundation of a railway bridge above shallow old mine goaf

2018 ◽  
Vol 169 ◽  
pp. 01041
Author(s):  
Hui-Quan Sui ◽  
Chun-Yuan Bait
Keyword(s):  
Fast Track ◽  
Construction Technology ◽  
Construction Site ◽  
Railway Bridge ◽  
Foundation Treatment ◽  
Pressure Grouting ◽  
Dip Angle ◽  
Bridge Foundation ◽  
The City ◽  
Design Construction

The city fast track railway bridge studied in this paper is located above an old mined out area. There is a 1500m2 underground goaf in the construction site with a depth of 30.8~53.2m, the seam thickness is 2.0~2.5m and the dip angle is 50~63 degrees. Although the mine has been abandoned for many years, there are still a lot of underground cavities. Collapse pits occurred on the surface occasionally till this day, especially during the rainy season. In order to make the design safe and reliable, drilling pressure grouting technique is proposed to fill and reinforce the foundation of the site. Proposed technique is tested by several experiments in simulated underground mined out area for the foundation treatment. The technical design, construction technology, grouting and reinforcement effect of the project are studied and summarized. The results of the experiment showed a stable and safe bridge foundation has been achieved. The proposed technique was then applied to on site experiment and pasted all tests.

Discussions on the Construction Technology of the Vibrating Inserting Rod Long Auger Bored Pile-CFA

2013 ◽  
Vol 395-396 ◽  
pp. 473-476
Author(s):  
Jiu Jun Wang
Keyword(s):  
New Technology ◽  
Construction Technology ◽  
Construction Process ◽  
Bored Pile ◽  
Key Points ◽  
Pressure Grouting

The vibrating inserting rod Long Auger Bored pile is a new technology of pressure grouting pile based on the development in the long spiral drilling. On the basis of introducing the method of traditional slurry drilled pile, this paper analyzes advantages of the vibrating inserting rod Long Auger Bored pile, the construction process and key points in detail, summarizes the causes of common quality defects of the vibrating inserting rod Long Auger Bored cast-with-pressure and their solutions.

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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