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【多选题】
根据《公路路基设计规范》(JTG D30—2004),以下有关路基的规定,哪些选项是正确的______
A.
对填方路基,应优先选用粗粒土作为填料。液限大于50%,塑性指数大于26%的细粒土,不得直接作为填料
B.
对于挖方路基,当路基边坡有地下水渗出时,应设置渗沟和仰斜式排水孔
C.
路基处于填挖交接处时,对挖方区路床0.80m范围内土体应超挖回填碾压
D.
高填方路堤的堤身稳定性可采用简化Bishop法计算,稳定安全系数宜取1.2
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