英语翻译One notable feature is that in some boreholes the shear strength initially increases with depth andthen reduces rapidly near the top of the limestone.This feature is not characteristic of in-situweathered Jurong Formation soils which demo

英语翻译One notable feature is that in some boreholes the shear strength initially increases with depth andthen reduces rapidly near the top of the limestone.This feature is not characteristic of in-situweathered Jurong Formation soils which demo
英语翻译
One notable feature is that in some boreholes the shear strength initially increases with depth and
then reduces rapidly near the top of the limestone.This feature is not characteristic of in-situ
weathered Jurong Formation soils which demonstrate a general increase in shear strength with
depth.
In the study area soils overlying the limestone rocks are described as S4a or S4b in the boreholes.
However these give the appearance of having been transported as fluvial muds and deposited in a
shallow water environment.None of the samples of soil materials overlying limestone rock appearto contain marine fossils though organic materials and decomposed wood fragments were found
down to 20m depth.In some areas the soils lying immediately above limestone rock were
observed to be relatively weak,less dense and highly permeable.
5.Water Ingress
The nature of all the different types of soils and rocks overlying limestone in the three zones
suggests that their deposition took place some time after the limestone rock was exposed as a
surface outcrop,weathered and under went Karstic processes.As a result there are
interconnecting fissures,joints and water paths in the limestone rock with possible direct
connections to the sea.This makes excavations in soils overlying the limestone rock highly
dangerous since as soon as a water path is established the whole excavation can become
inundated rapidly and without warning.An indication of this possibility may be seen through loss of
drilling water during site investigations.Table 5 compares the loss of drilling water during site
investigations at the three zones.

英语翻译One notable feature is that in some boreholes the shear strength initially increases with depth andthen reduces rapidly near the top of the limestone.This feature is not characteristic of in-situweathered Jurong Formation soils which demo
一个显著的特征是在一些探土孔中,切变强度最初随着深度而增大,然后在靠近石灰岩顶部时迅速下降.这个特征不是原位风化的证明了切变强度随着深度变化的一般递增规律句容地层的土地的最显著的特征.
在研究领域中泥土覆盖着的石灰岩的岩石区被描述为探土孔中的S4a或S4b.然而这些看起来像被搬运的河流冲刷的泥土并且被储存在一个浅水环境中.没有什么覆盖石灰岩的土壤物质的样本包含海洋矿物尽管在20米以下已经找到有机材料和已经腐烂的木头碎片.在一些区域中土壤直接覆盖在石灰岩表面上被观测到相当的脆弱,不密集,并且有很高的渗透性.
5.水浸入
3个区域的覆盖石灰岩的所有不同类型的土壤和岩石的性质说明它们的沉积有时发生在石灰岩像表面岩层一样暴露出来,被风化然后经历岩溶过程.结果是在石灰岩中有一些互联裂缝,接口处和一些水程可能直接连接到海中.这使石灰岩表面的土壤挖掘很危险,因为只要确定了一个水程整个挖掘可能会毫无预兆的被迅速淹没.这种可能的一个迹象可能会在现场调查钻井用水的流失过程中被发现.表格5比较了三个区域现场调查时的钻井用水流失.
呃,没什么专业知识,尽量翻译了一下,希望有帮助,采纳是最好的啦~