GPR applications for geotechnical stability of transportation infrastructures
GPR applications for geotechnical stability of transportation infrastructures
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DOI：
10.1080/10589759.2012.694884
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发表时间：
2012-01-01
影响因子：
2.6
通讯作者：
Tosti, F.
中科院分区：
文献类型：
--
作者：
Benedetto, A.;Benedetto, F.;Tosti, F.
当今世界，灾害性气象事件越来越频繁。这对环境造成了严重影响，如许多山体滑坡，特别是在农村地区。农村公路面临着越来越大的岩土不稳定风险。与此同时，由于国际危机和其他各种国内因素，用于维护的财政资源肯定会减少。在这方面，资金的最佳分配成为一个优先事项：计划和行动的效率和效力至关重要。为此，正确定位地质不稳定域具有战略意义。在本文中，使用探地雷达（GPR）的岩土工程检测的路面和路面下层的建议。一个三步协议已经过校准和验证，以高效和有效地分配维修资金。在第一步中，通过使用1 GHz GPR喇叭发射天线在交通速度下进行检查来定位不稳定性。生产率一般在300公里/天左右或以上。数据由自动程序离线处理。在第二步中，使用两个耦合天线进行限于关键路段的GPR检查。一个天线用于顶部路面检测（1.6 GHz中心频率），第二个天线（600 MHz中心频率）用于路面下层结构诊断。最后，在时域和频域中对探地雷达数据进行后处理，以准确地识别不稳定的几何形状。实例研究表明，该协议应用于农村公路暴露于滑坡的潜力。
Nowadays, severe meteorological events are always more frequent all over the world. This causes a strong impact on the environment such as numerous landslides, especially in rural areas. Rural roads are exposed to an increased risk for geotechnical instability. In the meantime, financial resources for maintenance are certainly decreased due to the international crisis and other different domestic factors. In this context, the best allocation of funds becomes a priority: efficiency and effectiveness of plans and actions are crucially requested. For this purpose, the correct localisation of geotechnically instable domains is strategic. In this paper, the use of Ground-Penetrating Radar (GPR) for geotechnical inspection of pavement and sub-pavement layers is proposed. A three-step protocol has been calibrated and validated to allocate efficiently and effectively the maintenance funds. In the first step, the instability is localised through an inspection at traffic speed using a 1-GHz GPR horn launched antenna. The productivity is generally about or over 300Km/day. Data are processed offline by automatic procedures. In the second step, a GPR inspection restricted to the critical road sections is carried out using two coupled antennas. One antenna is used for top pavement inspection (1.6 GHz central frequency) and a second antenna (600 MHz central frequency) is used for sub-pavement structure diagnosis. Finally, GPR data are post-processed in the time and frequency domains to identify accurately the geometry of the instability. The case study shows the potentiality of this protocol applied to the rural roads exposed to a landslide.