海底隧道围岩位移全曲线研究

限于施工现场条件，目前的隧道量测位移均是隧道实际位移的一部分，而隧道量测全位移则少有研究。以厦门海底隧道工程为依托，对隧道开挖各部拱顶下沉监测数据进行了回归分析，得出了海底隧道CRD1和CRD3部拱顶下沉未监测到位移的第1部分Y1。采用三维有限差分程序研究海底隧道各部位移全曲线，得出了掌子面到达研究断面前发生位移所占比例。根据实测资料得出海底隧道CRD1部和CRD3部拱顶下沉未监测到的位移第2部分Y0。将Y0和Y1与实测部分Ym相加，即得到隧道位移全曲线。

Study of whole curves of Rock mass displacements in subsea tunnel

The tunnel displacement measurement is only a part of the whole displacement curves limited to construction site conditions at present, however, there are little research on the unmeasured part of tunnel rock mass displacement. The measured data of arch crown settlements of the subsea tunnel each part rock mass was analyzed by regression method; so we get the first part of unmeasured displacements in CRD1 part and CRD3 part(Y1) .The whole curves of the subsea tunnel each part rock mass was studied by the finite difference method; and we gain the proportion of the unmeasured displacements in the whole displacements, so we can give the second part of unmeasured displacements in CRD1 part and CRD3 part(Y0), then we know the whole curves is the sum of the measured part(Ym) and the unmeasured part(Y0 and Y1