Established the calculation model of waterproof layer tensile above bridge crack, compute a minimum extension and strength the waterproofing layer must have hi a certain width crack.
The concept of the composite foundation is that setting some reinforcement body in or adding some hi-strength material in natural foundation.
复合地基是指天然地基在地基处理过程中部分土体得到增强或被置换或在天然地基中设置加筋材料。
3
Hi-Lock pins and nuts are used at helicopters widely for their hi-strength, high fatigue values, build-in preload, self-locking and other characteristics.