摘要 关键词］大体积混凝土；温度监测系统；裂缝控制；基础承台 [gap=879]Keywords:mass concrete; temperature monitoring system; crack control; cushion cap of foundation
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The loss of strength due to the strong disturbance of underlaying residual soil by the excavation of foundation trench shall cause obvious settlement of cushion cap with its gravity.
由于基槽开挖对下卧层残积土的强烈扰动导致强度丧失，造成承台在自重下明显沉降。
On the basis of discussing the damage mechanism of cushion cap, a method of optimum design for pile group foundation is put forward in this paper.
在讨论桩基承台破坏机理的基础上，给出群桩基础设计的优化方法。
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