分隔型基坑施工对邻近地层及隧道位移的影响

周鼎文,韩磊,应宏伟,朱成伟,李慧慧

Effect of segregated pit construction on displacement of adjacent strata and tunnel

Dingwen ZHOU,Lei HAN,Hongwei YING,Chengwei ZHU,Huihui LI

表 1 土体的物理力学参数

Tab.1 Physical and mechanical parameter of soil

土层 ds/m γ/(kN·m−3) c'/kPa φ'/(°) $ E_{50}^{{\mathrm{r e f}}} $/MPa $ E_{\mathrm{oed}}^{{\mathrm{r e f}}} $/MPa $ E_{\mathrm{ur}}^{\text {ref }} $/MPa $ G_{0}^{{\mathrm{r e f}}} $/MPa e ①杂填土 2.4 17 5 10 2 3.3 8 20 0.7 ②砂质粉土 11.3 19 7.5 31 11.5 11 46 160 0.735 ③淤泥质粉质黏土 21.6 17.6 10 22 3.3 2.25 22.5 65 1.1 ⑤粉质黏土 9.6 18.6 20 26 6 5.5 50 300 0.83 ⑧圆砾 25.1 22 1 40 25 25 100 400 0.35