某盾构掘进中地面塌陷事故分析及处理

Analysis and Treatment of Ground Collapse Accident in a Shield Tunneling

以某市盾构施工造成地面塌陷事故为例,根据事故现场及地质情况,提出了针对性的事故处理方案并实施,验证了事故处理方案的可行性。从工程水文地质、盾构掘进参数、设备维修保养及施工组织管理等方面分析了事故的原因;总结了在富水复合地层中土压平衡盾构施工管理及掘进参数控制对地面沉降控制的重要性,针对性地提出了地面沉降控制方法。

Taking the accident of ground collapse caused by shield construction in a city as an example,according to the accident site and the actual geological situation,this paper proposes and implementes the targeted processing scheme of the accident,which verifies the feasibility of the processing scheme. The accident causes are analyzed from the engineering hydrogeology,shield tunneling parameters,equipment maintenance and management and construction. The importance of construction management about earth pressure balance shield and tunneling parameter control to ground subsidence are summarized,also the control method for ground subsidence is put forward.