HUANG Zhi-gang.Application of Long-distance Curved Pipe Jacking for Crossing Rock Formation in Water Supply Pipeline Construction[J].China Water & Wastewater,2020,36(20 20):39-44.
Application of Long-distance Curved Pipe Jacking for Crossing Rock Formation in Water Supply Pipeline Construction
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
20 20
Page:
39-44
Column:
Date of publication:
2020-10-17
- Abstract:
- Limited by terrain and route selection, the long-distance water supply pipeline may cross a mountain with complicated geological conditions if necessary, which increases the difficulty and risk of project construction. In recent years, the curved pipe jacking for crossing rock formation has been gradually used for laying water supply pipes, and have some successful cases and engineering experience, however, it still has deficiencies in theoretical research and construction technology. Combining the example of a long distance water diversion project in a city, the theoretical study of surrounding rock pressure and the three-dimensional finite element numerical simulation, the calculation formula of surrounding rock pressure adaptable for rock pipe jacking is proposed and verified according to the pipeline depth limit division. Based on the existing specifications and calculation methods, a method for estimating the friction resistance of rock pipe jacking under ideal contact conditions of pipe slurry is provided. The axial stress distribution of the pipe during curved pipe jacking is analyzed, and the relationship among the eccentricity of the pipe joint, the core of the section and the maximum allowable jacking force of the pipe is summarized.
Last Update:
2020-10-17