摘要
从施工工艺出发,分析沉管灌注桩经常出现的断裂、缩径、离析与上浮等质量通病产生的原因,并应用一维应力波理论分析了桩身存在质量通病时应力波的传播特征,发现它们在波阻抗、相位、频率与幅值等方面存在差异,且差异的大小与质量通病的性质及严重程度密切相关,利用反射波法正好可以作出定性判断,然后对症下药,提出了10条预防措施、3条防治方法。实践证明,诊断方法与防治措施切实有效,沉管灌注桩质量可以得到保障。
This paper analyses reasons of break, reduce diameter, cement motar part from concrete, and upper float, which happens in immersed tube pouring into pile. With application one-dimension stress wave theory to practice, it researches the characteristic of the back wave in quality failing of pile, and finds out their difference in impedance, phase position, frequence, and amplitude, and their nature can be determined by back wave, and it is suggested that the plans suited the remedy to the case in prevention and cure.
出处
《地质灾害与环境保护》
2004年第4期73-77,共5页
Journal of Geological Hazards and Environment Preservation
