Poor Workmanship in Housing Construction 

(2)

Yes, just fill up, flatten the muddy soil within the ground beams, pour the concrete over it, the ground floor slab would be finished. Everything would buried under the feet. Only the new concrete surface would be seen and admired by the people!
What about the floor that sink and crack before and after being hardened?
Never mind, claim progress and money first and think about the problems later.

Often, the local Contractors are incompetent and ignorant, they cannot read Contract Specification (in English), but they can tell you that they have constructed buildings for more than twenty years. Therefore, they do not need the young Designers or Resident engineers to tell them what to do.

To prevent such situations, Site Engineers have to study what the Contractors/workers are doing at site, foresee coming problems and advise them immediately to take precautionary steps firmly when the machineries are around. For example, drainage is one of the most important temporary works in view of the frequent raining. By just building an earth drain surrounding the site and discharge to appropriate outlet will help to keep the site dry. Pumps must be available if water cannot be discharged speedily. Excavated earth shall be transported away as soon as possible if it is not required further. Outside ground level shall be lower than the designed floor level. Earthwork cannot be done on wet days, you cannot compact wet clayey soils! Sand is a better material for working in the wet season. The site Engineers have to be knowledgeable in the Specification and firm in authority before they are able to instruct the "experienced" contractors in writing, if they are not following orders.