盾构隧道施工期引起的地面沉降计算方法探析

在对目前计算盾构隧道施工引起的地表沉降的理论方法和经验方法进行对比分析基础之上，提出了Peck公式与随机介质理论的相关性，探讨了实际工程应用中的地表沉降计算问题。通过地表沉降计算式结合反分析法，可计算盾构隧道施工对环境影响的允许沉降值，当超过允许值时，即可判定施工质量存在问题，应通过调整施工参数和操作方法，将地表沉降控制在允许范围内。

Calculation of Ground Subsidence Caused by Shield Tunnel Construction

Based on comparison between calculation theory and empirical method of ground subsidence caused by shield tunnel construction, the relationship between Peck formula and stochastic medium theory is put forward and the ground subsidence in engineering is discussed. The allowable ground subsidence is calculated by using the ground subsidence formula combined with the back analysis method. When the allowable ground subsidence is exceeded, it is judged there is the flaw of construction qual- ity, which should be adjusted by construction parameters and operation methods to control it at the range of the allowable ground subsidence.