CAJ | 학술논문

随着高速公路和城市高等级公路建设的日益增多,出现了大量的浅埋隧道与公路相交的情况,隧道建设对地面道路影响问题越来越突出。通过使用数值分析软件ANSYS10.0建立隧道下穿既有高速公路的模型,研究隧道开挖对道路结构的应力及沉降变形的影响,并分析了其分布规律。研究表明隧道开挖后,隧道上方的道路结构产生了明显的纵向拉应力,当最大沉降接近3 cm时,面层和基层产生的最大拉应力接近容许拉应力,沉降和拉应力的长期存在加上车辆的反复作用增大了道路结构产生破坏的可能。注浆加固是减小沉降的常用且有效的方法。
수착고속공로화성시고등급공로건설적일익증다,출현료대량적천매수도여공로상교적정황,수도건설대지면도로영향문제월래월돌출。통과사용수치분석연건ANSYS10.0건립수도하천기유고속공로적모형,연구수도개알대도로결구적응력급침강변형적영향,병분석료기분포규률。연구표명수도개알후,수도상방적도로결구산생료명현적종향랍응력,당최대침강접근3 cm시,면층화기층산생적최대랍응력접근용허랍응력,침강화랍응력적장기존재가상차량적반복작용증대료도로결구산생파배적가능。주장가고시감소침강적상용차유효적방법。
With the express highway and urban high-grade road construction increasing,there have been a large number of the situations that shallow tunnels intersect with highways.The impact of tunnel construction on the ground roads becomes more and more outstanding.Here,a model about a tunnel piercing underneath the existing express highway is built by using the numerical analysis software ANSYS10.0 to study the stress and strain impact of tunnel excavation on the road structure,and analyze the distribution rules.The research shows that after the tunnel excavation,the road structure would generate significant vertical stress.When the biggest settlement closes to 3 cm,the maximum stress of the surface and base would close to allowed tensile stress,the long-term existence of the settlement and tensile stress as well as the vehicle would increase the possibility of road structure damage.Grouting consolidation is the commonly used and effective method to reduce the settlement.