TOPIC 2 FOUNDATIONS PART 3 OF 4

Hinzugefügt: 2026-05-21

[00:00:02]the next topic is factors affecting file selection the first factor is location and type of structure secondly ground conditions and thirdly durability lastly cost factors affecting other selection the first factor is getting on the location and type of structure [Music] the driven pile is actually most used in construction especially for works over water there are another types of pile which is cast in this part this one is actually we use in land building so the example of the test in place file is board part waterpark are usually the cheapest for moderate loading and unhampered side conditions other types may have to be used when constraint exists at site if you talk about the use of board file this part is actually very suitable if you working on a unpredictable bit wrong condition if you talk about unpredictable background condition it's actually just like limestone formation this limestone formation is actually exist in many parts of the world we talk about indonesia we have this kind of bedrock and this bedrock is actually uneven and it contains a lot of gravity of voice so if you want to avoid future failure of your power then it is the best to boil the soil until the backlog and then you boil the bedrock and you'll cut in place the footing on top of the limestone formation the second factor i want to discuss getting underground conditions so this is the most important factor [Music] when we want to decide which part we want to use so ground conditions influence both the choice of pilot and technique for installing piles driven piles cannot be used economically in ground containing boulders and where ground heath would be detrimental even parts are preferred for loose water bearing sands and gravels steel hedge files are suitable for condition where deep penetration is required in sense and level the factor that should be considered when selecting the pile is durability so you need to know at what condition you are going to use your path so often affect the selection of file type in varying conditions precast concrete may be preferred to steel piles from the aspect of resistance to corrosion however you need to make sure that your precast concrete file is actually generally resisting the sulfate and also the chloride attack that may happen and if this happen then it will cause corrosion for your reinforcement secondly timber power may be rejected for marine conditions because of risk to attack by mollusc type borders so exception is made if you are using bakao par because baka opa is actually very good for medium condition high quality precast concrete may have to be employed in soils containing sulphates or other deleterious substances so this part is actually a special part we use whether you are going to use the sulfate resistant cement for the pump or you want to use cover for the part in order to make sure that the pile can be durable and can last longer the last factors affecting the pump solution is the cost final choice of power is made from the constellation of course for example the overall cost cost of the filing work would include the contractor's resources experience and the ability to overcome difficult problems which may be encountered cause would also include the engineers provisions or the part installation and test loadings and others associated with the world for the betting capacity of a pile foundation there are only two factors we will consider the first one is the end value of the path which is given by qp the second one is the friction of the part which is given by qs how to calculate the end bearing is actually very simple there are only two factors we need to consider the first one is the qp which is a unique bending capacity the second one is the area of the point ap for the shaft resistance we have two parameters as well q shaft is given by f times by the cos the a s which is f is the unit frictional resistance and a s is actually the shaft area