引水隧道下穿铁路线路基沉降的数值分析
发布时间：2018-12-31 21:28
【摘要】：以福建省九龙江北引引水隧道下穿铁路线为研究对象,采用软件FLAC3D分析双洞引水隧道的下穿开挖对鹰厦铁路双线、厦深高铁双线的铁路路基的影响,通过模拟路基未加固和加固2种工况下,隧道单线贯通及双洞贯通后的路基的沉降情况.计算结果表明:最大沉降位于两隧道中心线正上方,路基未加固:右洞开挖对路基沉降的贡献64%左右,左洞贡献36%左右;路基加固:线开挖对路基沉降的贡献66%左右,左洞贡献34%左右.对比实测数据较为一致,证明拟合较好.
[Abstract]:Taking the underpass railway line of the diversion tunnel in the north of Jiulong River in Fujian Province as the research object, this paper analyzes the influence of the underpass excavation of the double-hole diversion tunnel on the railway subgrade of the Ying-Xia Railway and the Xia-Shen High-speed Railway by using the software FLAC3D. In this paper, the settlement of subgrade with single line and double holes is simulated under the condition of unstrengthened and strengthened subgrade. The results show that the maximum settlement lies directly above the center line of the two tunnels, and the subgrade is not strengthened: the contribution of the excavation of the right hole to the settlement of the subgrade is about 64%, and the contribution of the left tunnel is about 36%; Roadbed reinforcement: the contribution of line excavation to subgrade settlement is about 66%, and that of left tunnel is about 34%. Compared with the measured data, it is proved that the fitting is better.
【作者单位】： 华东交通大学岩土与道桥工程研究所;南昌铁路局福建地方铁路有限责任公司;南昌铁路局;
【基金】：国家自然科学基金资助项目(51068006) 江西省研究生创新基金资助项目(YC2013-S169)
【分类号】：U213.1;U455.4
本文编号：2397134
[Abstract]:Taking the underpass railway line of the diversion tunnel in the north of Jiulong River in Fujian Province as the research object, this paper analyzes the influence of the underpass excavation of the double-hole diversion tunnel on the railway subgrade of the Ying-Xia Railway and the Xia-Shen High-speed Railway by using the software FLAC3D. In this paper, the settlement of subgrade with single line and double holes is simulated under the condition of unstrengthened and strengthened subgrade. The results show that the maximum settlement lies directly above the center line of the two tunnels, and the subgrade is not strengthened: the contribution of the excavation of the right hole to the settlement of the subgrade is about 64%, and the contribution of the left tunnel is about 36%; Roadbed reinforcement: the contribution of line excavation to subgrade settlement is about 66%, and that of left tunnel is about 34%. Compared with the measured data, it is proved that the fitting is better.
【作者单位】： 华东交通大学岩土与道桥工程研究所;南昌铁路局福建地方铁路有限责任公司;南昌铁路局;
【基金】：国家自然科学基金资助项目(51068006) 江西省研究生创新基金资助项目(YC2013-S169)
【分类号】：U213.1;U455.4
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