Study on the Technology of Trenchless Pipelines Construction and Its Corresponding Impact on Geological Stratum Deformation Modulus

摘要

As a main construction technology, horizontal directional drilling has been widely applied. In this paper, technical principles, technical features, construction methods and present problems at present faced are introduced. Through using horizontal directional drilling technology, good social and economic benefits can be achieved. At the same time, according to existing discontentment and elastic deformation of stratum during the course of drilling under condition of trenchless construction stratum deformation will happen and corresponding mechanical parameters will be weakened. So a new back-analysis of FEM is put forward based on field-measured data. Before and after trenchless construction, the calculated results can reflect the changing law of geological stratum deformation modulus and of course the results not only can be used to assess the impacts on geological stratum brought by trenchless construction, but also can provide theoretical support to pipelines construction.