Construction organization of tower crane foundation pile design scheme ...
Each tower crane cushion cap is provided with 4 piles with a diameter of 600, a spacing of 4400, and a distance of 600 from the pile center to the cushion cap edge. The ratio of pile spacing to pile diameter is 7.33>6, without considering pile group effect. The tower crane foundation cushion cap is located on the old soil. According to the survey report, the bottom elevation of the cushion cap is located at 49.00m. The direct bearing stratum is sandy silt ② 1 layer and clayey silt silty clay ② 2 layers. Then the elevation of the pile top is set as 49.10m, entering the pile cap 100, the elevation of the pile bottom is set as 26.50m, and the bearing layer at the pile end is pebble. The pile is 22.60m long. The pile body concrete C20 adopts the underwater pile pouring process, and the concrete strength is increased to C25. Reinforcement 8 (20, stirrup（ 6.5@200 The main reinforcement is anchored into the cushion cap for 30d. A total of 12 piles are set for three tower cranes. 3. Estimation of single pile bearing capacity: designed as end bearing friction pile, calculation parameters: side friction above 36.50 meters is - 30 Kpa, side friction below 36.50 meters is - 60 Kpa, and end resistance is 2000 Kpa. Then the ultimate bearing capacity of single pile Quk=2400KN, and the design bearing capacity of single pile is 1200KN.
