A.水壓力、腐蝕性; B.腐蝕性、浮力; C.腐蝕性、浮力; D.水壓力、浮力、腐蝕性、動水壓力;
A.1.0m; B.0.6m; C.0.25m~0.5m; D.視土體的強(qiáng)度大小而變化;
A.路線穿越法; B.追索法; C.布點(diǎn)法; D.A+B+C