Abstract: In development of the city underground cable laying, the trenchless technologies, such as the curved tube pulling technology, due to their characteristics of the little influence on the environment, the simple process and the wide usability in laying the line passing through long distance obstacles, are used more and more widely. Combining with the practical situation of curved tube pulling construction project, the principle of the construction and the matters needing attention in the construction were analyzed. The jacking force data of the site jacking machinery and the field settlement data were monitored and analyzed. The result shows that by monitoring and dynamical feedback, the curved tube pulling construction scheme was verified effectively; and the favorable effects were obtained. The scheme provides certain reference for similar curved tube pulling construction projects.

Key words: curved tube pulling technology, guided construction, grouting for reducing resistance, pull backward to enlarge the hole