CAJ | 학술논문

针对目前土地复垦工程质量验收与评定工作中的不足,利用 GR-Ⅲ高频探地雷达系统,对重庆市赶水镇部分已完成的土地复垦工程中的覆土工程厚度、农渠衬砌厚度以及生产路路面厚度等进行了无损探测,揭示了它们在雷达信号方面的响应特征;并设计了雷达剖面层位识别算法,实现分层界面特征点的重采样,利用不同的电磁波估算方法,实现了覆土、沟渠衬砌以及生产道路水泥路面等厚度信息的获取;并基于此,构建了复垦工程质量评价模型,对已探测的3个单项工程进行了科学整体的评价.探测结果表明,对于土地复垦工程,探地雷达可以实现工程质量的无损检测,获取更加全面的数据,且750 MHz特高频天线系统探测效果更佳.评价结果表明,覆土工程、生产道路工程质量评价等级分别为Ⅱ、Ⅰ,而农渠防渗工程的质量评价等级为Ⅲ,后期需要加厚处理.该研究可为土地复垦工程质量的验收提供一个新的途径和科学依据.
침대목전토지복은공정질량험수여평정공작중적불족,이용 GR-Ⅲ고빈탐지뢰체계통,대중경시간수진부분이완성적토지복은공정중적복토공정후도、농거츤체후도이급생산로로면후도등진행료무손탐측,게시료타문재뢰체신호방면적향응특정;병설계료뢰체부면층위식별산법,실현분층계면특정점적중채양,이용불동적전자파고산방법,실현료복토、구거츤체이급생산도로수니로면등후도신식적획취;병기우차,구건료복은공정질량평개모형,대이탐측적3개단항공정진행료과학정체적평개.탐측결과표명,대우토지복은공정,탐지뢰체가이실현공정질량적무손검측,획취경가전면적수거,차750 MHz특고빈천선계통탐측효과경가.평개결과표명,복토공정、생산도로공정질량평개등급분별위Ⅱ、Ⅰ,이농거방삼공정적질량평개등급위Ⅲ,후기수요가후처리.해연구가위토지복은공정질량적험수제공일개신적도경화과학의거.
The scope of damaged land caused by coal mining is increasing every year. For the sake of relieving the conflict between population growth and land availability, lots of land reclamation projects have been imposed in many provinces of China. However, the quality examination of those projects, which is considered as a key basic safeguard, always uses traditional methods. Few studies have reported on quick, non-destructive, and comprehensive engineering quality-testing methods. In order to overcome the deficiencies of quality inspection and evaluation in land reclamation projects, a variety of high frequency ground-penetrating radar GR-Ⅲ systems has been used to detect the projects of covering, field canal and production road of the land reclamation in Ganshui town, Chongqing city, all the response characteristics of radar signal had been revealed. Using the energy changes of each sampling channel in different regions of radar image, the horizon identification algorithm was represented, which was used to resample the feature points of each horizon in different projects. On this basis, key factors of project quality, such as the depths of covering, field canal lining, and concrete pavement of production roads were calculated by different estimation methods using electromagnetic wave velocity, which were also considered as the indexes of the new evaluation model of reclamation project quality. The results show that GPR can realize nondestructive testing of land reclamation project quality and obtain comprehensive data. The detection effectiveness is positively correlated with the antenna’s center frequency. The final evaluation result shows that qualities of the covering project and production road are classⅡand I, respectively. They meet the needs of farmland production, but the quality of field canal lining is class Ⅲ, which must be thicker in later work. This study could provide a new way and a scientific basis for the evaluation of land reclamation project quality.