ABSTRACT
In order to ensure the safe construction of the foundation pit of the underground station, this paper takes Suzhou Rail Transit Line 8 as an example and uses the single hole dilution method based on the dilution principle and finite element software to judge the possible leakage position of the underground diaphragm wall and prevent excavation safety accident. The results show that it is accurate and feasible to find out the location of the leakage point of the foundation pit enclosure by measuring the flow rate by the concentration change of the tracer saturated NaCl solution.
