非对称超载对地铁深基坑的支撑不动点调整系数影响

林舒琦,范晓真,徐长节,方焘

Impact of asymmetric overload on fixed-point adjustment coefficient of strut in deep metro excavation

Shuqi LIN,Xiaozhen FAN,Changjie XU,Tao FANG

表 3 民治站基坑支撑不动点调整系数计算值、实测值与设计采用值对比

Tab.3 Comparison of calculated value, measured value and design adopted value of fixed-point adjustment coefficient for foundation pit support of Minzhi Station

超载工况 h/H Δl_m Δs_m λld[6] λl_c λl_m Δλl ξl/% λsd[6] λs_c λs_m Δλs ξs/% 不同超载大小 0.615 40.6 5.5 0.5~1.0 0.829 0.882 0.053 6.39 0~0.5 0.171 0.118 0.053 30.99 不同超载大小 0.776 38.0 11.1 0.5~1.0 0.767 0.774 0.007 0.91 0~0.5 0.233 0.226 0.007 3.00 不同超载作用宽度 0.615 40.6 5.5 0.5~1.0 0.839 0.882 0.043 5.13 0~0.5 0.161 0.118 0.043 26.71 不同超载作用宽度 0.776 38.0 11.1 0.5~1.0 0.774 0.774 0.000 0.00 0~0.5 0.226 0.226 0.000 0.00 不同超载与坑边距离 0.615 40.6 5.5 0.5~1.0 0.799 0.882 0.083 10.39 0~0.5 0.201 0.118 0.083 41.29 不同超载与坑边距离 0.776 38.0 11.1 0.5~1.0 0.728 0.774 0.046 6.32 0~0.5 0.272 0.226 0.046 16.91