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[来源:www.yuniguhua.com] [作者:淤泥固化] [日期:19-09-03]

淤泥的主要特性是:天然含水率高于液限,孔隙比多大于1.0;干密度小,只有0.8~0.9克/立方厘米;压缩性特别高,压力自9.8×10帕增加到19.6×10帕时,压缩系数为a1-2>0.05,压力自9.8×10帕增加到29.4×10帕时压缩系数a1-3>0.1;强度极低,常处于流动状态,视为软弱地基。淤泥按孔隙比可再细分为淤泥(孔隙比大于 1.5)和淤泥质土(孔隙比为1~1.5)。
The main characteristics of sludge are as follows: natural water content is higher than liquid limit, pore ratio is more than 1.0; dry density is small, only 0.8-0.9 g/cubic centimeter; compressibility is especially high, when pressure increases from 9.8 x 10 Pa to 19.6 x 10 pa, compressibility coefficient is A1-2 > 0.05, compression coefficient a1-3 > 0.1 when pressure increases from 9.8 x 10 Pa to 29.4 x 10 pa; strength is very low, often in Flow state is regarded as weak foundation. Silt can be subdivided into silt (pore ratio greater than 1.5) and muddy soil (pore ratio 1-1.5).
淤泥的自然结构变化十分敏感,结构及其强度受力破坏后能自动复原,这就是所谓的触变性。淤泥不宜作天然地基,因为它会产生不均匀沉降,使建筑物产生裂缝、倾斜、影响正常使用。在淤泥上进行建筑时必须采取人工加固措施。如压密、夯实,用垂直砂井排水,加速淤泥固结。有时可采用柱基,或在建筑物上部采用适应于不均匀沉降的刚性圈梁,沉降缝等结构措施,以保证建筑物的稳定安全。
The natural structure change of silt is very sensitive, and the structure and its strength can be automatically restored after being destroyed, which is called thixotropy. Silt should not be used as natural foundation, because it will produce uneven settlement, which will cause cracks, inclination and affect the normal use of buildings. Artificial reinforcement measures must be taken when building on silt. If compacted and compacted, drainage by vertical sand wells will accelerate sludge consolidation. Sometimes, column foundation, rigid ring girder and settlement joints can be used to ensure the stability and safety of buildings.

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