全球导航卫星系统-动态后处理技术在强夯夯沉量监测中的应用

强夯法因其经济便捷、效果显著等优点,已成为目前应用最广泛的地基处理方法.目前,中国强夯施工信息化水平较低,夯沉量的监测普遍采用人工测量,测量设备信息化程度低且精度差,难以实现对强夯数据的精准控制与信息化管理.针对目前夯沉量测量存在的痛点问题以及信息化监测的工程需求,提出基于全球导航卫星系统-动态后处理(global navigation satellite system-post processed kinematic,GNSS-PPK)的夯沉量监测技术,采用远程无线电(long range radio,LoRa)建立实时数据通信链路,事后进行高精度PPK解算的技术手段,实现对夯沉量的动态监测.遵循低功耗高精度的设计原则进行了夯沉量监测系统的软硬件设计.依照强夯施工的监测需求进行试验验证,实验结果表明:系统能够在强夯高冲击环境下实现厘米级测量,低功耗设计满足在线长期监测,为强夯施工摆脱人工测量实现信息化监测提供了新思路.

Application of GNSS-PPK Technology to Dynamic Compaction Settlement Monitoring

The dynamic compaction method has become the most widely used method of foundation treatment due to its advantages of economy, convenience, and remarkable effect. At present, the level of informatization of dynamic compaction construction in my country is relatively low,and the tamping volume of dynamic compaction construction is measured manually as well as the measurement equipment has low informatization degree and poor accuracy, these status quo make it difficult to achieve precise control and information management of dynamic compaction data.. Aiming at the current pain points of ramming measurement and the engineering needs of information monitoring, it is proposed to use GNSS-PPK (Post Processed Kinematic) technology to dynamically monitor ramming. A scheme of using LoRa to establish real-time data communication link and perform high-precision PPK calculations afterwards to achieve the dynamic monitoring of the tamping volume. Based on the design principle of low power consumption and high precision, the software and hardware design of the ramming monitoring system is carried out. According to the monitoring requirements of the dynamic compaction construction, the experiment shows that the system can achieve centimeter-level measurement in the high-impact environment of the dynamic compaction. The low-power design meets the online long-term monitoring, which provides a new way for the dynamic compaction construction to get rid of manual measurement and realize information monitoring.