公路隧道复杂采空区综合探测技术

由于山岭地区矿山的无序开采,形成的采空区对隧道建设和长期运营造成安全威胁。为确定采空区状况,首先分析了工程地质情况,然后在分析各种探测方法原理和特点的基础上,提出了AGI、EH4深浅结合探测和TGP、GPR长短结合综合探测方案。以礼让隧道为工程实例,结合地形地貌对复杂采空区段进行综合探测,经数据及结果分析后得到了采空区纵断面分布图,并将探测结果与实际工况做比较,表明此种方案能够规避单一探测方法的多解性与局限性,可较为准确的判断采空区位置与范围,为隧道线路设计、空区危害性评估及其防治提供依据。

Comprehensive detection technology for complex goaf in highway tunnel

Because of the disorderly exploitation in the mountainous region, the formed goaf often brings hidden danger to tunnel construction and long operation. In order to determine the status of goaf, the engineering geological conditions was analyzed at first, and then proposed ''deep-shallow'' combination detection method by EH4 and AGI, ''long-short'' combination detection method by TGP and GPR. By giving an example of Comity Tunnel, we detected the complex coal mine goaf according the topography and obtained the distribution profiles of the goaf by analyzing the detection data and the results. The results were compared with the actual conditions, it shows that the program can circumvent multiple results and limitations of single method, delimit the section and scope of goaf, which could provide the basis for the route design, risk assessment and treatment.