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Heavy tamping integrated dynamic compaction control

机译：重型捣固综合动力压实控制

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Heavy tamping is a deep dynamic compaction technique and has been increasingly used since the beginning of the 1970s. The present paper reports on in situ measurements and theoretical investigations referring to the decay of free soil vibrations caused by the falling weight after each impact. This behaviour is significant for the respective soil—falling mass interaction and enables a site-specific optimisation of the heavy tamping technique. The field tests comprised acceleration measurements of the falling mass and the soil whereby the falling height was changed repeatedly. The decay of the amplitudes of free vibrations provided a damping coefficient and a damped natural frequency, which are used to determine the Poisson's ratio and the E-modulus of the ground after each impact from numerical calculations. The scope of the research project was to gain a reliable indicator for the degree of compaction of the soil immediately after each impact, and hence obtain a method for compaction control and documentation.
机译：重夯实是一种深层的动态压实技术，自1970年代初以来已被越来越多地使用。本文报道了现场测量和理论研究，涉及到每次撞击后重量下降所引起的自由土壤振动的衰减。这种行为对于相应的土壤-下降质量相互作用非常重要，并且可以对重夯实技术进行特定位置的优化。现场测试包括对坠落物和土壤的加速度测量，从而使坠落高度反复变化。自由振动幅度的衰减提供了阻尼系数和阻尼固有频率，这些阻尼系数和阻尼固有频率用于通过数值计算确定每次冲击后的泊松比和地面的E模量。该研究项目的范围是在每次撞击后立即获得可靠的土壤压实度指标，从而获得压实控制和记录方法。

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