personally it is the bored piles with cappingbeam and lagging wall. / GK1}h
the main reason for this collapse may be the shortage of bending moment resistance of the wall. the surrounding building is the critical origin of the large lateral force. Z>) (yi9+
from the photo it can be seen that the site soil is not so bad. 26c,hPIeXY
measures may be : soil nailing between the piles to increase the wholly stability of the wall; b`@aiXN)+
increase the embedment (if the collapse came from overturning of the wall); prop up the wall with berms or inclined wall; or tie back from the back of the wall; eRK
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meanwhile, monitoring should be carried out very carefully.
