CAJ | 학술논문

新旧路基结合处理技术是确保既有线路改造成功的关键。运用有限元分析的基本原理,采用Adina数值模拟软件模拟了局界到湖沿的新旧路基立体交叉结合的典型断面,对新旧路基结合部位的沉降特征进行综合研究,包括内侧路肩和外侧路肩顶面的纵向沉降、路基结合处三个剖面顶面的横向沉降,并分析产生不均匀沉降的原因。计算结果表明,不均匀沉降主要发生在新路基一侧;地基的固结沉降和新旧路基的相对滑移是造成不均匀沉降的主要原因;沉降量最大值出现在新路基靠近顶点的一侧。结合立体交叉路段的沉降规律,提出了改进措施。
신구로기결합처리기술시학보기유선로개조성공적관건。운용유한원분석적기본원리,채용Adina수치모의연건모의료국계도호연적신구로기입체교차결합적전형단면,대신구로기결합부위적침강특정진행종합연구,포괄내측로견화외측로견정면적종향침강、로기결합처삼개부면정면적횡향침강,병분석산생불균균침강적원인。계산결과표명,불균균침강주요발생재신로기일측;지기적고결침강화신구로기적상대활이시조성불균균침강적주요원인;침강량최대치출현재신로기고근정점적일측。결합입체교차로단적침강규률,제출료개진조시。
The technique for the joint of new and old roadbeds is the key point to reform the existing lines successfully.By using the basic principle of the finite element analysis,a typical section of graded crossing joints of new and old roadbeds from Jujie to Huyan was simulated with Adina software.The settlement characteristics of roadbed joint parts were analyzed,including vertical settlements of roadbed＇s medial and outboard shoulders and lateral settlements of three different sections,and the reasons inducing the non-uniform settlements were analyzed.The results showed that non-uniform settlement mainly occurred at the side of new roadbed;the consolidation settlements of road foundations and the slippages between new and old roadbeds were two major reasons causing non-uniform settlements;the maximum settlement occurred at the side of new roadbed close to its top.By getting settlement regularity of graded crossing,the improvement measures were suggested.