跑道拼接工程对道面的影响

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3mm；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7m。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。

Influence of Runway Joint to Pavement

Based on the Expansion Project of HongQiao international airport airfield area, monitor and analyse the influence of new-built taxiway and runway joint non-suspend air construction to runway pavement. Though the monitoring of runway surface settlement, surrounding soil vertical displacement, horizontal displacement, pore-water pressure and ground water table, result shows that runway surface settlement caused by joint is very small, more than 60% measured vertical displacement less than 3 mm; and joint does not affect surrounding soil ground water table; and joint brings the excess pore-water pressure in the surrounding soil to sharp increase to 2 times than nomal pore-water pressure, and it dissipate mostly after one year since finish construction; and joint brings the vertical displacement and horizontal displacement in surrounding soil, the influence decreased with depth, affecting the depth does not more than 7 m. Studies show that,though take appropriate construction plan and appropriate precautionary measures, the influence of runway joint will not affect the normal use of runway.