maranep
Geotechnical
- Aug 22, 2019
- 3
Hi all,
The temporary wall was constructed 2.5 years ago. Due to some reasons, the owner did not proceed with the construction activities. As a contractor, we are asked to do some modification on existing shoring wall for our work. The shoring types are continuous secant pile wall and solider -timber lagging shoring system. we have a conditional assessment (only visually) report from the owner. In the report, they did some monitoring survey and found that shoring wall moved for 50 mm within 2 months and also stated that material performance is not guaranteed. the tiebacks would have de-stressed already and it needs lift-off test to re-evaluate the anchors load. With these conditions, what are the repair works would you consider. I think the following repair actions may work: 1) replace the timber lags wherever it is damaged or bowed 2) additional tieback installation if required 3) shotcrete the damaged caisson piles. After we do these repair works, will it be safe shoring wall? Note: wall is fully loaded (complete mobilization of lateral pressure) and observing continuous wall movement (top deflection)and height of wall varies from 5 to 8 m. do you recommend any field Non-destructive testing/any field test to verify the shoring wall conditions
Thanks,
The temporary wall was constructed 2.5 years ago. Due to some reasons, the owner did not proceed with the construction activities. As a contractor, we are asked to do some modification on existing shoring wall for our work. The shoring types are continuous secant pile wall and solider -timber lagging shoring system. we have a conditional assessment (only visually) report from the owner. In the report, they did some monitoring survey and found that shoring wall moved for 50 mm within 2 months and also stated that material performance is not guaranteed. the tiebacks would have de-stressed already and it needs lift-off test to re-evaluate the anchors load. With these conditions, what are the repair works would you consider. I think the following repair actions may work: 1) replace the timber lags wherever it is damaged or bowed 2) additional tieback installation if required 3) shotcrete the damaged caisson piles. After we do these repair works, will it be safe shoring wall? Note: wall is fully loaded (complete mobilization of lateral pressure) and observing continuous wall movement (top deflection)and height of wall varies from 5 to 8 m. do you recommend any field Non-destructive testing/any field test to verify the shoring wall conditions
Thanks,
