The integrity of the foundation pit enclosure
structure is key to ensure the safe excavation of the foundation pit. In this
study, the pumpingtracing method is proposed for
detecting underground diaphragm wall leakage, and a case study is conducted on
a foundation pit project of Hudian road station on Suzhou railway line 8 to
validate its applicability in practical projects. First, a joint leakage
detection method of pumping and tracing is applied by placing boreholes on both
sides of the underground diaphragm wall. Second, the location of the hidden
leakages in the underground diaphragm wall is investigated according to the
test data under natural and pumping conditions. Finally, a twodimensional finite element numerical model is established to
simulate the observation well flow rate under different seepage depths, and the
results are compared with the actual measured results. The study results
demonstrate the feasibility and effectiveness of the proposed method in
underground diaphragm wall leakage detection.
NIU Ruoxin
,
DONG Haizhou
. Experimental and Numerical Simulation of PumpingTracing
Method for Detecting Leakage in Underground Diaphragm
Wall[J]. Tunnel Construction, 2022
, 42(11)
: 1889
-1897
.
DOI: 10.3973/j.issn.2096-4498.2022.11.008
