【摘要】 由于工程需要,对广梧高速公路(马安—河口段)的地震地质情况进行了考察,马安—河口路段所处大地构造性质为东南地洼区,穿越了三个次级构造分区:白土断陷、思劳断隆、云浮断隆。路段附近发育3条断裂:肇庆断裂、河口断裂和吴川-四会断裂。前两者为非活动断裂,后者为活动断裂且呈北东向从思劳附近穿过,是未来5 0/4～5 0级级地震发生地段,烈度可达Ⅵ度。但路段附近地震活动水平较低,仅发生过43地震4次,最大烈度为Ⅴ度。白诸立交、河口立交的地震地质环境稳定,思劳立交基本稳定,沿线不易产生滑坡与崩塌。更多还原

【Abstract】 Because of the demand of project, we have surveyed the seismogeology of Guangwu express highway (Maan-Hekou). The section of the highway lies in southeast DIWA of geotectonics. It passes through three sub-structure areas: Baitu down-faulted, Silao fault-block mountains and Yunfu fault-block mountains. There are: Zhaoqing fault, Hekou fault and Wuchuan-Sihui fault in the area. The former two are inactive faults, the latter is active fault and passes through about Silao at northeastward, where MS50 will occur. Its intensity will reach VI. The seismic activity about the section of highway is lower, where only four times MS4 3/4～50 occurred, and the biggest intensity reaches V. The seismogeological environment of the cloverleaf junction of Baizhu and Hekou is stable, but Silao is basically stable. Landslides and collapses don’t occur easily. 更多还原