中文摘要：

目前,我国地铁隧道施工引起地表沉降对地面建筑物的有害影响问题极为严重,特别是遇到含水砂层这样复杂地层情况下,地表沉降将会更大,对建筑物有害影响更重.因此,寻求并实施行之有效的隧道加固措施尤为重要.以青岛地铁一期工程（3号线）河河区间隧道为工程背景,首先优选了全断面注浆与大管棚预支护联合施工工艺;然后,采用MIDAS-GTS二维平面应变弹塑性非线性方法模拟了全断面注浆与大管棚预支护相结合条件下饱水砾砂层隧道施工引起的地层位移效应,获得了地表沉降的分布规律,由此分析了全断面注浆与大管棚预支护联合施工工艺对饱水砾砂层隧道施工引起地面沉降控制的效果,并利用现场监测验证了其实效性与可行性,对青岛地铁后续类似工程的施工具有重要参考价值.

英文摘要：

At present,the problem of harmful effects on building caused by ground surface settlement of the subway tunnel construction in China,is very serious.Especially in face of such a complex water-bearing sand formations,the ground surface settlement will be bigger and harmful effects on buildings.Therefore,implement effective tunnel reinforcement measures are particularly important.This paper,combining with the Qingdao Subway（Line 3）river tunnel as the engineering background,studies the joint construction technology of the fullsectional grouting and pipe shed by using the MIDAS-GTS-dimensional plane strain nonlinear elastic-plastic method.It simulates the effect of ground displacement caused by tunnel construction under the joint construction technology of the full-sectional grouting and pipe shed of saturated water gravelly sands,obtains a distribution of ground surface settlement,analy-ses the control effect of ground surface settlement,site monitoring to verify its effectiveness and feasibility.It proves to be valuable for the subsequent construction of similar projects in Qingdao subway.