| 摘要 |
PROBLEM TO BE SOLVED: To prevent the influence of ground subsidence or the like, and also prevent the occurrence of cracks in the water barrier stratum by an underground stratum or the influence of dry contraction by supporting a water barrier stratum by a ground stratum consisting of blending low penetration material being swelled by a supply of aggregate and moisture and curing material. SOLUTION: Since an underground stratum 21 is blended with aggregates using site generated earth, bentonite 6, and cement, and cement as being curing material of underground stratum 21 has a more blending rate than that of a water barrier stratum, a sufficient mechanical strength is given to support a water barrier stratum 22. Moreover, since a compression strength is intensive, it has a water barrier ability similar to the conventional one. Also, since the compression strength is intensive, even in the case where a base ground 1 is weak, there takes place no shift or the like on the water barrier stratum 22. Furthermore, it the ground 1 sinks, the water barrier stratum 22 is supported by the strengthened underground stratum 21, so that the water barrier stratum 22 and water barrier sheet 3 never break. This can prevent the influence of ground subsidence or the like, or the influence of dry contraction.
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