I am currently on a project based on FIDIC Red book 1992 edition. The measurement was in accordance with POMI.
During the excavation the condition met on site was different from the report of soil investigation given during the tendering stage. Also the drawing indicated that the pit excavation should get to hard strata with additional information of average depth of pit excavation for each building. While in some buildings it works partially and some the depth increases due to the formation of the soil within the site. The excavation collapse due to the loose soil formation. For instance a particular building that has pit excavation depth of average 3.5m on the depth schedule, after excavating to this depth; we have not reach the hard strata. This was notified to the engineer who instructed to excavate further to hard strata and the depth now increased to an average depth of 7m.but does not want to pay for this excavation. Pit excavation cannot even been carried out because of this loose soil formation and closeness of pits so mass excavation was carried out.
Can you please advice on this issue having said that contractor should visit the site during tendering stage? No contractor can foresee this depth without proper soil investigation. Is it the duty of contractor to carry out soil investigation during tender?
FRANCIS
During the excavation the condition met on site was different from the report of soil investigation given during the tendering stage. Also the drawing indicated that the pit excavation should get to hard strata with additional information of average depth of pit excavation for each building. While in some buildings it works partially and some the depth increases due to the formation of the soil within the site. The excavation collapse due to the loose soil formation. For instance a particular building that has pit excavation depth of average 3.5m on the depth schedule, after excavating to this depth; we have not reach the hard strata. This was notified to the engineer who instructed to excavate further to hard strata and the depth now increased to an average depth of 7m.but does not want to pay for this excavation. Pit excavation cannot even been carried out because of this loose soil formation and closeness of pits so mass excavation was carried out.
Can you please advice on this issue having said that contractor should visit the site during tendering stage? No contractor can foresee this depth without proper soil investigation. Is it the duty of contractor to carry out soil investigation during tender?
FRANCIS