Recently, good news came from the Netherlands: the research results of Shanxi Jinbaodao, Changsha University of Science and Technology, and Guangdong Provincial Communications Planning, Design and Research Institute Group Co., Ltd., titled "METHOD FOR CONTROLLING DYNAMIC COMPACTION PROCESS BY MEASURING COMPACTION SETTLEMENT THEREIN AND METHOD FOR OPTIMUM COMPACTION TIME" (Chinese: A method for determining the settlement and optimal number of blows in dynamic compaction), have been authorized by the Dutch Patent Center (Octrooicentrum Nederland).

2023 Patent Technology Solution Description

This patent achievement is mainly a method for determining the settlement and optimal number of blows in the dynamic compaction process. The method for determining the settlement in the dynamic compaction process includes:

Dividing the dynamic compaction process into an impact loading stage and an unloading rebound stage; establishing the displacement time-history equation of the tamper during the impact loading stage to obtain the displacement of the tamper during the impact loading stage; establishing the displacement time-history equation of the tamper during the unloading rebound stage to obtain the rebound displacement of the tamper during the unloading rebound stage; calculating the settlement of the dynamic compaction process by subtracting the rebound displacement of the tamper during the unloading rebound stage from the displacement of the tamper during the impact loading stage. This application separately establishes the displacement time-history equations of the tamper for the impact loading stage and the unloading rebound stage, and calculates the settlement of the dynamic compaction process based on the above displacement time-history equations, providing a theoretical basis for determining the settlement, and being able to calculate the settlement of the dynamic compaction process, and further determine the optimal number of blows for the dynamic compaction process based on the settlement.

Compared with existing methods, the main aspect is that it can separately establish the displacement time-history equations of the tamper for the impact loading stage and the unloading rebound stage, and calculate the settlement of the dynamic compaction process based on the above displacement time-history equations. This method provides a theoretical basis for determining the settlement. Moreover, the theoretical values of the settlement calculated by this method are consistent with the experimental values, that is, the method can calculate the settlement of the dynamic compaction process; secondly, it can reflect the variation law of the tamper displacement during the dynamic compaction process under multiple blows, and determine the settlement under different numbers of blows, thereby judging the optimal number of blows based on the reinforcement efficiency, providing a theoretical basis for determining the optimal number of blows. The reinforcement efficiency is completely defined by the settlement, and the calculation and analysis method is relatively simple. It can evaluate the compaction effect of a single dynamic compaction process and can reflect the variation law of reinforcement efficiency under different numbers of blows during the dynamic compaction process, possessing certain advantages.

This patent is the fourth patent authorization obtained by Shanxi Jinbaodao in the first half of this year. It is understood that Shanxi Jinbaodao currently has multiple patents under application. In the second half of the year, the company will continue to strengthen the protection and application of intellectual property rights and continuously promote the transformation of scientific research achievements.‍