Research of Ground Movement based on Numerical Simulation and DCRP Technology in HDD Method
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    Abstract:

    Due to the complex stratum and drilling fluid pressure, ground movement often occurs during the process of horizontal directional drilling. A project in Mesa of America is introduced in this paper. The ground movement numerical simulation work is based on FLAC3D under different drilling fluid pressure from 0 MPa to 0.9 MPa. The results show that the max distance of z axis is 26 mm. Combined the DCRP technology and leveling method, the author fond that the max distance of z axis are 28 mm for DCRP and 30 mm for leveling method. These results are very near to the simulation results. During the field measurement, 26 targets were fixed on the ground surface. The max difference between DCRP and leveling is 2.7 mm which shows that the accurate is nearly the same. As a noncontact measurement, the DCRP technology is not limited by the field cases and the staff level as leveling method.

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History
  • Received:September 10,2010
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  • Published: October 25,2010