The high level underground water causes damages on the concrete board of the canal such as seep, freezing, sulfate erosion and swelling by swelled ground.
由于地下水位高，造成地下水对渠道混凝土板的渗透破坏、冻胀破坏、硫酸盐侵蚀破坏和膨胀土膨胀破坏。
It is easy to form subgrade disease on swelled ground because swelled ground has features of swelling and softening by absorbing water shrinking and cracking by losing water and repeated changing.
膨胀土具有吸水膨胀软化，失水收缩开裂及反复变化的特点，易形成路基病害。
It is easy to form subgrade disease on swelled ground because swelled ground has features of swelling and softening by absorbing water shrinking and cracking by losing water and repeated changing.
膨胀土具有吸水膨胀软化，失水收缩开裂及反复变化的特点，易形成路基病害。
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