The Preliminary Application Of Trench Less Technology In The Water Supply Pipe Replacement Project In Longnan Area, Daqing Oilfield

Along with the development of the national economy and the acceleration ofurbanization, urban capacity and expansion increases more and more rapidly. Theconstruction of urban infrastructure changes with each new day. The reconstructionand expansion of the municipal pipe network and other infrastructure in the city areconstraint by the buildings, green spaces and the existing underground pipe network.Excavation and construction to the laying of the pipeline costs greatly increased, andeven some area can not excavated.In this case the trenchless pipeline construction isparticularly important.This paper focuses on the development and classification oftrenchless technology and the characteristics of different trenchless technologies, andmainly introduces the application of two trenchless technologies in Longnan regionsof Daqing oilfield.The main contents are as follows:(1) Describes the concept and classification of trenchless technology, and thecharacteristics and implementation methods of different trenchless technologies.Bythe development characteristics of Daqing city and the water supply net work analysisof the Daqing oilfield, this paper introduces the development background of thetrenchless technology in Daqing, as well as the development situation of thenon-excavation technology at home and abroad, Thus explain the broad marketprospects and significance of trenchless technology.(2)Detailed descriptions of the initial application of the stainless steel lining inLongnan-Xianfeng main lines. Conducted in-depth study on the stainless steel liningtechnology from the technical principles, project overview, construction preparation,the construction plan, construction process and many other aspects of technicalmeasure.The stainless steel lining technology to achieve such complex pipe as the"old shell+filling layer+stainless steel lining layer" be directly made underground,the corrosion resistance of metal stainless steel is used as anticorrosion layer insteadof plastic and glass fiber reinforced plastic coating. This achieved good social and economic benefits.(3) Detailed descriptions of the preliminary application of the PE pipe "U" shapefolding method lining repair technology in Longnan—Xingxi main lines. Based onthe actual situation and characteristics of the project, this paper expounds the principleof PE pipe "U" type folding method, and mainly describes the actual applicationstatus and highlights to enhance the ascending pipe use value, prolong service life,break all kind of pipeline construction problems, play the investment benefit ofpipeline renovation through the introduction of the process of the practicalimplementation. The technology is also available to use for drainage, gas, petroleum,petrochemical and other systems.However, there are still many inadequacies in this research, it's needed tostrengthen the application research and discussion to the other trenchless technology,especially in-depth study of the pipe jacking technology and directional drillingtechnology.The "second pioneering" and in-depth development of Daqing Oilfieldprovides a broad market space for non-excavation technology field.