The Application of Long-Distance Curved Pipe Jacking in Power Pipe Construction

ICPTT 2011 ◽  
2011 ◽  
Author(s):  
Yong Chen ◽  
Yongguang Chen ◽  
Yihua Huang
Keyword(s):  
Long Distance ◽  
Curved Pipe ◽  
Pipe Jacking

Guiding Survey Technology for Long Curved Pipe Jacking

2013 ◽  
Vol 639-640 ◽  
pp. 247-250
Author(s):  
Shao Tang Liu ◽  
Guo Rong Pan ◽  
Hui Feng Zhang
Keyword(s):  
Three Dimensional ◽  
Reference Points ◽  
Transformation Model ◽  
Long Distance ◽  
Time Saving ◽  
Curved Pipe ◽  
Survey System ◽  
Guide System ◽  
Pipe Jacking ◽  
Datum Transformation

The paper discusses guide survey system in long distance curved pipe jacking, presents a three-dimensional datum transformation model to determine the orientation of jacking pipe，The unitary principle and the new navigating method are introduced and the methods accuracy and variance are analyzed. The intelligence guide system is carried through easily associate with total station. The mathematical model, the operation principle, the hardware realization of extra long pipe jacking automatic guidance are introduced. Practice shows that all the reference points are used more efficiently in the new model than in the general model, and the surveying and navigating system gets enormous time-saving against conventional methods

scholarly journals Research on the Slurry for Long-Distance Large-Diameter Pipe Jacking in Expansive Soil

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Xian Yang ◽  
Yang Liu ◽  
Chao Yang
Keyword(s):  
Large Diameter ◽  
Soil Layer ◽  
Expansive Soil ◽  
Expansion Ratio ◽  
Water Dissociation ◽  
Long Distance ◽  
Calculating Method ◽  
Water Based ◽  
Pipe Jacking ◽  
Jacking Force

When the pipe jacking technology is applied in expansive formation, the soil around the pipe will easily absorb water from the slurry and expand to wrap up the pipe, producing an excessive pipe jacking force. A water-based slurry formula suitable for pipe jacking in expansive soil layer was proposed in this paper. Firstly, the key design points of pipe jacking slurry in expansive soil were put forward. Secondly, plant glue, potassium humate, Na-CMC, and graphite powder were chosen as treating agents to improve the slurry performance. The effect of addition levels of different treating agents on the funnel viscosity, filter loss, expansion ratio, friction coefficient and water dissociation rate of the slurry were tested. Thirdly, based on the results of single-factor tests, a water-based slurry formula suitable for pipe jacking in expansive soil was obtained. Finally, the slurry formula was applied in a practical pipe jacking project in expansive formation, and the jacking force was controlled well in the whole jacking process. The new water-based slurry is cheap and practical and has no pollution to environment. Furthermore, a simple and practical calculating method of the pipe jacking force was presented. The comparison of the calculated and measured pipe jacking force shows that the simple calculating method can estimate the jacking force well. Improving slurry performance to reduce jacking force in pipe jacking and predicting pipe jacking force accurately can help reducing the investment for counterforce wall and jacking system in pipe jacking engineering.

Challenges in a Long-Distance Pipe Jacking and Solutions in China

2011 ◽  
Vol 480-481 ◽  
pp. 1260-1265
Author(s):  
Liu Hui
Keyword(s):  
Case History ◽  
Long Distance ◽  
Second Stage ◽  
Construction Scheme ◽  
Construction Techniques ◽  
Information Construction ◽  
History Of ◽  
Selection For ◽  
Pipe Jacking ◽  
Optimal Construction

Pipe jacking, for its incomparable technical superiority, has been gaining wider and wider application in municipal construction project. However, there are many difficulties in terms of construction techniques and the long-distance pipe jacking is one of the most complicated. This paper, with the case history of the first and second stage of the sewage disposal project in Chongqing, presented the comparison and selection for the optimal construction scheme of long-distance pipe jacking, the installation techniques of pipe-jacking equipments, pipe-jacking construction method, technical challenges and possible solutions. The result of the study shows that long-distance pipe jacking technique, if carefully designed and combined with information construction, can be widely applied to the construction of municipal infrastructure in China.

Steel Curved Pipe Jacking Construction under Complicated Conditions for a Curved Pipe Roof

2016 ◽  
Author(s):  
Peng Zhang ◽  
Baosong Ma ◽  
Cong Zeng ◽  
Hongming Xie ◽  
Daowei Wang ◽  
...  
Keyword(s):  
Curved Pipe ◽  
Pipe Jacking ◽  
Complicated Conditions

Key techniques for the largest curved pipe jacking roof to date: A case study of Gongbei tunnel

2016 ◽  
Vol 59 ◽  
pp. 134-145 ◽  
Author(s):  
Peng Zhang ◽  
Baosong Ma ◽  
Cong Zeng ◽  
Hongming Xie ◽  
Xuan Li ◽  
...  
Keyword(s):  
Curved Pipe ◽  
Pipe Jacking ◽  
Key Techniques
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