For private houses, especially those using shallow foundation (ice clamps, raft foundation), there is a very common phenomenon in construction or construction. Most of the buildings have geological survey of the foundation; Design of foundation structure according to the calculation of the house load and geological survey results and construction in accordance with the design, the house will only sink several centimeters, not affect the stability (no crack phenomenon).
There are three main reasons for cracking
- No geological survey of construction land or geological survey report. Therefore, there is no basis to calculate the bearing capacity of the ground or the survey data wrong to lead to wrong design compared to reality.
- There is geological survey, calculation of structural design wrong as not calculating full load of the works (static load and dynamic load), miscalculation of foundation structure...
- Having proper geological survey, structural design is in accordance with standards, but construction is not in accordance with design, resulting in subsidence, cracking. In addition, some other causes also lead to the cracking of the house such as improper use of the purpose (expected housing but used as a floor dance floor or heavy store or add more floors. ), earthquakes, construction of savings (low safety factor) when the unexpected impact on the home can also cause cracking...
Therefore, the determination of causes of cracking need specialized people to survey the current status and design records. When determining the cause of cracking, there will also be many solutions, depending on the solution of the renovation design or the condition of the house as well as conditions of construction and economic conditions.
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