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

摘要

As a main construction technology, horizontal directional drilling has been widelyrnapplied. In this paper, technical principles, technical features, construction methodsrnand present problems at present faced are introduced. Through using horizontalrndirectional drilling technology, good social and economic benefits can be achieved.rnAt the same time, according to existing discontentment and elastic deformation ofrnstratum during the course of drilling under condition of trenchless constructionrnstratum deformation will happen and corresponding mechanical parameters will bernweakened. So a new back-analysis of FEM is put forward based on field-measuredrndata. Before and after trenchless construction, the calculated results can reflect thernchanging law of geological stratum deformation modulus and of course the resultsrnnot only can be used to assess the impacts on geological stratum brought byrntrenchless construction, but also can provide theoretical support to pipelinesrnconstruction.