下列关于咬合桩桩头破除说法错误的是（）

下列关于咬合桩桩头破除说法错误的是 A. 调直主筋 B. 保持主筋顶标高一致 C. 不宜采用人工破除 D. 宜采用炮机破除 E. 露出密实混凝土 答案: CD Explanation: The correct statements are A, B, and E. A: Adjusting the main reinforcement to make it straight is a correct approach. B: Ensuring the consistent top elevation of the main reinforcement is also correct. E: Exposing the compacted concrete is another correct statement. The incorrect statements are C and D: C: It is not recommended to use manual breaking to remove the pile head. D: Instead, it is advisable to use an explosion (blasting) machine to break the pile head.