CAJ | 학술논문

结合某湖区公路拓宽工程,通过对路基拓宽工程病害的成因分析,认为新老路基结合部间的不协调变形是路基拓宽工程病害产生的根本原因.基于"变形协调与控制"的处治思想,分析了土工格栅防止路基不均匀沉降的机理,对土工格栅的处治效果进行评价.在具有典型地质条件和较高填方地段布置了监测断面,进行动态监测.监测结果显示,加筋路堤内部的竖向应力随格栅层间距的减小而降低,而水平应力却随之增加;沉降随格栅层间距的减小而减小.研究结果表明,土工格栅处治后拓宽路基变形及新老路基差异变形均很小,为新老路基差异沉降的评价提供了依据.
결합모호구공로탁관공정,통과대로기탁관공정병해적성인분석,인위신로로기결합부간적불협조변형시로기탁관공정병해산생적근본원인.기우"변형협조여공제"적처치사상,분석료토공격책방지로기불균균침강적궤리,대토공격책적처치효과진행평개.재구유전형지질조건화교고전방지단포치료감측단면,진행동태감측.감측결과현시,가근로제내부적수향응력수격책층간거적감소이강저,이수평응력각수지증가;침강수격책층간거적감소이감소.연구결과표명,토공격책처치후탁관로기변형급신로로기차이변형균흔소,위신로로기차이침강적평개제공료의거.
According to the road-widening problems of lake district,based on analysis of distresses in subgrade widening engineerings,the collusion was discussed. Adopting the technical treatment principle of "deformation coordinate and control",the treatment techniques of geogrids were analyzed for preventing the differential settlement on subgrade,and the efforts of geogrids was evaluated.Combining construction course of the field,sections was selected with typical geotechnical condition and comparatively high embankment,then a dynamic monitoring was performed.Acording to the dates of settlement,the results indicate that the vertical stress decrease and the lateral stress increase at the same time,the surface settlement of a geogrid-reinforced embankment is decreased with the decrease of the reinforcement spacing. The results show that the uncoordinated deformation is the main reason of the failure. The settlement in itself and the differential settlement in road-windening is small,which provides basis for differential settlement accessing and the disposal methods.