复杂地质条件下采用浅埋暗挖工艺施工的城市地下道路设计要点

Key Points of Urban Underground Road Design by Shallow Buried Excavation Technology under Complex Geological Conditions

以深圳海府路地下通道项目为依托,分析该路段复杂地质条件以及含有丰富地下水的特点,宜采用浅埋暗挖工艺施工,同时结合超前小导管辅助支撑工艺,使该方法更好地适用于软弱土层施工。施工过程中,地表沉降监测变化小于0.3 mm,累计变化范围在5.7~11.7 mm之间;地板隆起本期变化小于0.2 mm.累计变化范围在0.1~2.9 mm之间,均在安全值范围内。

Based on the underground passage project of Shenzhen Haifu Road,and the complex geological conditions and the characteristics of rich groundwater in this section are analyzed,it is appropriate to adopt the buried excavation process,and combined with the advanced small pipe auxiliary support process,so that this method is better suitable for the construction of weak soil layer.During the construction,the surface settlement monitoring change is less than 0.3mm,and the cumulative change range is between 5.7 mm and 11.7 mm;the floor uplift change is less than 0.2 mm.The cumulative change range is between 0.1 mm and 2.9 mm,all within the safety range.