论文部分内容阅读
以某高速公路下伏大溶洞为工程背景,通过FLAC3D软件进行数值模拟分析,以塑性区贯通度、竖向应力位移场与最大最小主应力场为评价稳定性的参量。计算结果表明该溶洞对路基稳定性不利,采用凿穿顶板、回填卵石块石与加铺混凝土进行综合处治,通过多点位移计进行工后近2年的沉降位移监测,最大沉降量约为30 mm,满足路基沉降要求,监测数据论证了该处治方法的可靠性。
Taking a large underground caverns of an expressway as the engineering background, numerical simulation analysis was conducted by using FLAC3D software. Through the plastic zone connectivity, the vertical stress displacement field and the maximum and minimum principal stress field as the parameters to evaluate the stability. The calculation results show that the cave is unfavorable to the stability of the roadbed, and the roofing, roof pebble and backfill pebble concrete are comprehensively treated. The settlement monitoring of post-construction work for nearly two years is carried out by multi-point displacement meter. The maximum settlement is about 30 mm, to meet the subgrade settlement requirements, monitoring data demonstrate the reliability of the treatment method.