黄土地层浅埋暗挖地铁隧道施工引起地表沉降预测

Prediction of Ground Surface Settlements Caused by Shallow-buried Subway Tunneling in Loess Stratum

在我国城市地铁隧道施工引起的地表沉降的研究中,随机介质理论应用相对较晚。在对不规则隧道断面施工引起的地表沉降预测的过程中,进行了大量的简化,并且预测结果与工程实际出入较大。在修正的随机介质理论基础上,利用标准变换原理,得出了随机介质理论解析公式的极坐标表达式,使其对于任意断面隧道施工引起的地表沉降计算同样适用。在上述讨论的基础上,通过对实际工程的验证,证明了上述方法的有效性和可靠性。

The random medium theory is applied lately in the research of the ground surface settlements caused by the urban subway tunneling in China.There are a lot of simplification and many differences between the prediction results and the engineering practice in the prediction process of the ground surface settlements caused by the irregular sections of tunneling.On the basis of the amended random medium theory,by utilizing the standard conversion principle,the polar coordinate expression of the analytical formula of random medium theory is obtained to make it also applicable for the calculation of the ground surface settlements caused by any sections of tunneling.On the basis of above discussion,the practical projects verify the availability and reliability of the above method.