Penpendrum
Civil/Environmental
thread261-318645
I have a similar problem related to the issue similar to the thread above. The trench is 4 feet wide and 12 feet deep, with the highest water table at 4 feet below the ground surface. We have sufficient trench shielding; however, this is not enough to prevent the loosening of the soil outside the trench shield. The existing soil conditions, with buried utilities underneath, limit our ability to use anything other than steel plates and shoring jacks. We are using 3/8" manufactured aggregates as pipe bedding, but since the water table is high, how can we compact the base course aggregates within the water table? Pumping out the water only leads to more cave-ins.
I have a similar problem related to the issue similar to the thread above. The trench is 4 feet wide and 12 feet deep, with the highest water table at 4 feet below the ground surface. We have sufficient trench shielding; however, this is not enough to prevent the loosening of the soil outside the trench shield. The existing soil conditions, with buried utilities underneath, limit our ability to use anything other than steel plates and shoring jacks. We are using 3/8" manufactured aggregates as pipe bedding, but since the water table is high, how can we compact the base course aggregates within the water table? Pumping out the water only leads to more cave-ins.