Rocky Geological And Confined Water Geology Construction Technology Of Water Under Geological Conditions Apply

Pipe jacking or less a non-excavation depth excavation of underground pipeline construction method. For areas not closed excavation, pipe jacking jacking speed fast craft, can effectively protect the environment and ensure the safety of construction work, less impact on the underground pipeline, foundation, saving, efficient, safe, and low total cost. However, in practical engineering applications, are affected in different geological conditions, environmental changes and other factors, there are many technical problems of construction, yet the actual analysis and research to better guidance services for the construction.This paper describes the development history, working principle, process and construction type of pipe jacking. It analyzes the pipe jacking construction technology of water combined with the geological and geological conditions in Rocky pressure(1)Rocky binding problem under geological conditions encountered in pipe jacking, pipe jacking work surface when the narrow, stonework removal difficult, landslides and other difficulties, demolition blasting construction on the surrounding stonework building large facilities, and the value should not be over-excavation control, difficult to guarantee the personal safety of operating personnel. To solve this technical problem, summed developed under a combination of geological conditions in Rocky manual pipe jacking construction method. And three from the technical aspects of stonework removed, the inner tube grouting, steel protective safety cover and other analysis and actual project case; Jinan City Water Purification Factory pipe network expansion project first project tenders were analyzed and summarized. The project from the stonework broken pipe jacking work pit production, rail construction, finalized installation, erection work pit plane were studied several aspects of conduit jacking, etc., were tested and validated in the construction, the effect of the actual construction good, technical indicators meet the construction requirements.(2)Confined Water pipe jacking geological conditions encountered include the effect of water pressure of underground engineering, water pressure geological features, geological conditions of water pressure problems. Pipe jacking under the technical issues were from dewatering well construction, mixing pile, caisson construction, steel sheet pile four aspects of technical analysis and research. Actual project case; Jinan Yufu River Yang Taiwan Village conversion of surface water groundwater engineering analysis and summary. The project is due to the river can not be slotted construction, pipe jacking take in water pressure geological conditions, in order to ensure the construction of safe, pit, pit receives all reinforced concrete caisson, water pressure slurry balanced pipe jacking technology, and select the top, respectively, slurry pressure estimate, the total estimated thrust tube equipment, the initial jacking, Slurry jacking, jacking measure, pipe jacking attitude control, through the terms of pipe jacking construction measures were analyzed and summarized. Practice has proved that the small tube top construction technology footprint on the surrounding environment, less traffic impact, and avoid the water pressure geological could bring safety accidents, the actual construction to good effect, the successful completion of construction tasks, tested the relevant technical specifications meet the construction requirements, with good economic and technical value.While Jinan Rocky geological conditions and bearing technology and construction of water pipe jacking geological conditions, and make a few suggestions, and I hope in the future to similar geological conditions jacking pipe construction of a reference for a certain role.