Driving piles will cause soil displacement. As a result, the previously driven pile will move upward and laterally. Pile heave value directly proportional to soil displacement. Therefore, as the number of driven piles increased pile heave will increase. The heave in cohesive soil is significant. As a result, the heave should be considered in the design stage. Using low displacement piles and improved method of installation (such as predrilling to reduce soil displacement) may consider if the calculated heave values are enormous.
In the events of adjacent piles heave while driving new piles more than 13 mm for end bearing piles. Pile shall be re-driven. Similarly, adjacent piles shall be re-driven if the upward movement is more than 38 mm for friction piles.