Based on the theory of Similarity, the model of trial-pit supported by reinforced continuous cement-soil wall and the displacement-values on the top of wall after excavation can be measured. By means of the model of exponential function, the relation curve of the displacement with the embedded-ratio is fitted. It is shown that good fitting effect can be obtained when the relation curve of the displacement with embedded-ratio is fitted by means of the model of exponential function. In engineering construction, the displacement-values on the top of wall with the excavating of pit can be forecast...
