Tubes should be laid at 0.5 m to 1.0 m depth in heavy soils and deeper in light soils.
排水管在硬质土壤中埋的深度为0.5 - 1.0米，在软质土壤中要埋的更深一些。
The sources, definition and soils of the light pollution are analyzed.
指出了光污染产生的原因和光污染的定义及分类。
This soil has promising future due to its advantages such as light weight, high strength, self-standing, short project execution time, re-utilization of surplus soils, and environmental friendliness.
这种土具有轻质、高强、自立性好、施工工期短及废物再生利用和环境保护的优点，因此在工程中具有极广泛的应用前景。
In this paper, the analyses on influencing factor of frost heave are being conducted in the light of seasonal frost soils for highway projects.
对公路桥涵季节性冻土冻胀的影响因素进行了分析，并利用冻胀率进行分类供防冻害设计时进行参考。
In this paper, the analyses on influencing factor of frost heave are being conducted in the light of seasonal frost soils for highway projects.
对公路桥涵季节性冻土冻胀的影响因素进行了分析，并利用冻胀率进行分类供防冻害设计时进行参考。
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