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以虹桥国际机场飞行区扩建工程为依托,通过对拼接区域进行跑道表面沉降及周边土体竖向位移、水平位移、孔隙水压力和地下水位等项目的监测,对新建联络道与既有跑道的拼接工程不停航施工对跑道道面性能的影响进行全面监测与分析。监测结果表明,拼接工程引起的道面沉降量较小,超过60%的测点竖向位移小于3 mm;拼接工程对周边土体地下水位没有影响;拼接工程会引起周边土体产生超孔隙水压力,最大可达到正常孔隙水压力的2倍,工后1年基本消散;拼接工程会引起周边土体产生竖向和水平向位移,影响程度随深度增加而减少,影响深度不超过7 m。研究表明,通过采取合适的施工方案及必要的防范措施,拼接段施工不会影响跑道的正常使用。
Based on the expansion project of Hongqiao International Airport Flight Area, the runway surface settlement and vertical displacement of surrounding soil, horizontal displacement, pore water pressure and groundwater table are monitored in the spliced area. Stitching works do not stop the construction of the runway pavement performance of a comprehensive monitoring and analysis. The monitoring results show that the road surface settlement caused by the splicing project is small, and the vertical displacement of measuring points over 60% is less than 3 mm. The splicing works have no effect on the groundwater level of the surrounding soil. The splicing project may cause excess pore water The pressure can reach 2 times of the normal pore water pressure and dissipates basically after 1 year. The splicing project will cause vertical and horizontal displacement of the surrounding soil. The influence degree will decrease as the depth increases, and the influence depth will not exceed 7 m. The research shows that the splicing section construction will not affect the normal use of the runway by adopting suitable construction plan and the necessary precautionary measures.