高等级公路沉降监测及影响性评价

Subsidence Monitoring and Impact Evaluation for High Grade Highway

为了分析地表下沉对高等级公路的影响,采用小基线集技术,利用徐州地区2007年至2010年间16景ALOS PALSAR影像,对位于徐州境内的G310国道部分线路的沉降情况进行监测,获取监测期间内公路沿线的沉降分布场。对G310国道沿线进行沉降剖面分析和沉降特征点时序分析,并针对地表下沉对高等级公路的影响性进行评价。研究表明:G310国道沿线存在两处明显的沉降中心,其最大沉降速率分别为53.7 mm/a、61.9 mm/a,沉降"较严重"等级以上的道路里程达到3.77 km。应进行现场勘查,并针对危险路段采取有效的防治措施。

In order to analyze the impact of surface subsidence to high grade highway,Small Baseline Subset（ SBAS） technique was adopted to monitor the settlement along National Rd G310 located in Xuzhou city with 16 scenes ALOS PALSAR images data from 2007 to 2010. First,average subsidence velocity was extracted. Then the subsidence profile and feature points sequence along National Rd G310 was analyzed. Finally,the impact was evaluated of surface subsidence to high grade highway. The research shows that there are two obvious settlement centers along National Rd G310 with maximum subsidence rate of 53. 7 mm / a and 61. 9 mm / a. The road length with subsidence grade above the ＂ relatively serious＂ reaches 3. 77 km. Investigation is necessary and the effective prevention as well as control measures also should be taken.