复合土钉支护技术在深基坑中的应用

The application of composite soil nailing technology on a deep excavation

该基坑工程地质上存在的主要问题是上层为杂填土和呈流塑态的淤泥,自稳能力极差,还受现场施工条件以及经济因素的限制。本基坑采用的支护方案为:I选用段顶部放坡+粉喷桩+土层锚杆;Ⅱ、Ⅲ段选用喷锚支护。竣工后期的变形监测数据表明该支护方案的选择是成功的。

The main geology matters of the foundation were the silt plastic state and miscellaneous fill with the poor stability ability and restrictions on construction site conditions and economic considerations.The final choice of support scheme is： I section is supported by the top section slope-DJM-soil anchor;Ⅱ,Ⅲ are supported by shotcrete-bolt support.The later deformation monitoring data show that the supporting schemes are successful.