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1 堤基的防渗处理①大堤以农田为堤基。处理较为简单,首先要清除地面附着物,附着物的存在易使大堤与地面之间形成一夹层,对大堤的防渗极为不利。处理可采用铲运机拉去地面附着物和腐殖土(10～20cm),然后碾压至设计要求的干密度即可。②大堤以沟塘河道为堤基。这种基础处理较为复杂,首先是排水,然后清淤(清到原状土为止)。清淤时应注意不光是底部要清除干净,边
1 embankment impervious treatment ① embankment farmland for the embankment. Treatment is relatively simple, first of all to clear the ground attachments, the presence of attachments easy to make a dike and the ground between the formation of a barrier against the dike is extremely unfavorable. Processing can be scraped to pull the ground attachments and humus (10 ~ 20cm), and then rolled to the design requirements of the dry density can be. ② levee ditches to ditch embankment. This basic treatment is more complex, the first is the drainage, and then dredging (until the original soil so far). Dredging should pay attention to not only clean the bottom to be clean, while