【摘要】：以福建省九龍江北引引水隧道下穿鐵路線為研究對(duì)象,采用軟件FLAC3D分析雙洞引水隧道的下穿開挖對(duì)鷹廈鐵路雙線、廈深高鐵雙線的鐵路路基的影響,通過模擬路基未加固和加固2種工況下,隧道單線貫通及雙洞貫通后的路基的沉降情況.計(jì)算結(jié)果表明:最大沉降位于兩隧道中心線正上方,路基未加固:右洞開挖對(duì)路基沉降的貢獻(xiàn)64%左右,左洞貢獻(xiàn)36%左右;路基加固:線開挖對(duì)路基沉降的貢獻(xiàn)66%左右,左洞貢獻(xiàn)34%左右.對(duì)比實(shí)測(cè)數(shù)據(jù)較為一致,證明擬合較好.
[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.
【作者單位】： 華東交通大學(xué)巖土與道橋工程研究所;南昌鐵路局福建地方鐵路有限責(zé)任公司;南昌鐵路局;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51068006) 江西省研究生創(chuàng)新基金資助項(xiàng)目(YC2013-S169)
【分類號(hào)】：U213.1;U455.4

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