Abstract: The steep deep of the bedrock underneath the Dagangshen Power Station induces a significant challenge for the seepage cut-off wall grouting operation. The tilting requirement for the project has a very restrictive requirement with a maximum tilting angle of 0.5 degrees per 100 meters. This project utilized the software Origin to process the cut-off wall grouting data. The multivariate statistics, numerical analysis, regression analysis and back analysis are performed so that the grouting angle and orientations were closely monitored. The variation of borehole bending and the projected borehole tilting can be presented. The results can be satisfactorily applied in the construction monitoring of the Dagangshen cut-off wall grouting operations.

Key words: Origin, Multivariate statistics, Regression Analysis, Tilting Mechanism