１概况白河主坝是密云水库７座土坝中最大的１座,为壤土斜墙砂砾料坝体的碾压式土坝。最大坝高６６．４ｍ,坝顶长度９６０．２ｍ。坝体座落在砂卵石覆盖层上,左岸颗粒较粗,右岸颗粒较细。在桩号０+３００～０+５００ｍ一段,覆盖层最深达４４ｍ,其他部位一般为３０ｍ左右。... 1 Overview The main dam of the Baihe River is one of the seven largest earth mounds in the Miyun Reservoir. It is a roller compacted earth dam of sandy and gravel material dam with sloping walls. The maximum height of 66.4m dam, dam length 960.2m. The dam body is located on the sand and gravel overburden, with coarse particles on the left bank and fine particles on the right bank. In the station 0 +300 ~ 0 +500 m section, the deepest coverage of 44m, other parts of the general is about 30m. ...