北千二级站集水井施工

Construction of the collecting well for No. 2 project on the north main stream

利用液压反铲，在流沙地基上快速开挖集水池基础，并及时浇筑防渗体混缔造儿得成功，阻挡了流砂大量向基坑内涌进，确保了集水池的顺利施工。

The hydraulic lift is used to quickly excavate the collecting well on a shifting sandfoundation. The placement of seepage prevention concrete body in time achieves great success,which stops the sand flowing to the foundation pit and ensures advance of collecting well con-struction.