Punching Shear Check Punching shear along the column perimeter should be satisfied according to the standard codes.
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Here is how to assume the thickness of the pile cap: If diameter of pile 550mm: thickness = 1/3 3. Pile cap thickness must also be sufficient to meet anchorage-bond length requirements of starter bars and normal punching shear requirements. Recommended Thickness of Pile Cap One of the important things to consider in a pile cap design is to determine enough thickness. Corrections for the above image: for 2-Pile Group, length of the pile cap should be (?+1) x Øpile + 300 and for the 5-Pile Group, pile to pile spacing would be: s=?(2?) x Øpile 2. The figure below shows the most common use shapes of the pile cap and the recommended dimensions.
The shapes vary according to the number of piles in the pile cap that can be deriving according to the load in a column supporting it. Recommended Shape and Its Dimensions The first thing to consider in the pile cap design is to determine the shape of the pile cap to use. To make it simple, we will break down our design assumption with the following. In this article, we will be dealing with the standards in determining pile cap geometry and dimensions as well as its design considerations. But knowing the correct pile cap dimensions can be considered as a halfway already in design completion. The designer’s struggle on pile cap design begins with the consideration of what dimensions or pile cap geometry to assume at first. To achieve this can only be done by understanding its design principles and proper detailing of pile caps. These considerations include the proper spacing of each pile, the pile cap thickness and so on. Designing a pile cap seems to be complicated because a lot of considerations need to take into account to achieve a safe and sound foundation. Pile cap serves to transmit the load of the building into the hard strata of the soil via a pile or group of piles.ĭesign-wise, the pile cap design uses a truss system principle that can be designed using a strut and tie method. This is commonly used in building foundations with the geographical locations having a very low soil bearing capacity. Deep Foundation: Footing Pile Cap Design A pile cap is one of the types of foundation that consist of a thick concrete pad that is usually supported by piles.