then this is church tile is leaning to one side but they do not topple over. so how did architects manage to build on this difficult ground without the buildings collapsing. the secret is to be found in simple wooden posts. hundreds of thousands of them were driven into the bed of the lagoon. depths of 3 to 8 meters below the surface architects had discovered in layer of sedimentary clay known as kind until beneath the mud. by driving the posts into this layer of clay a stable building foundation was made possible. civil engineer dino chu morning explains the principle was the father will be in order to stabilize the building substrate wouldn't piles were driven into the bed in each area. if sufficient piles are used in the areas then so that with water the mud between the piles becomes