Mai Thanh Service Co is building a new multi storey office and commercial tower, the Lim Tower. The project includes a 4 basement carpark. A local
company constructed the Diaphragm Wall forming the permanent basement wall. When the excavation reached approximately 12 m depth a water infiltration through a defect diaphragm wall panel occurred, followed by infiltration of sands and finally resulting in the collaps of an adjacent building. We were approached by the Main Contractor responsible for the structural works and offered our services for emergency assistance at the time of the
collapse and finally were awarded the repair works by the Client.
In order to repair the main collapse, a full grout curtain was designed outside of the excavation pit. Low-pressure grouting was applied with two lines of grout columns to stabilize and seal of the panel. Once repaired from the outside, sandbags were removed and the panel repaired from the inside by steel plates allowing the Client to reach final excavation without additional leakages or infiltrations.
Scope of Works:
Analyse D-Wall Situation, Repair to Reduce Water Leakage and Low-pressure Grouting outside of D-Wall