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在地下水的作用下,粉土路基填料的含水量及密实度会发生系列变化。尤其是强烈毛细水上升高度,对路基产生危害作用更大。为此我们通过现场调查以及室内和现场试验对淮北地区粉土路基的毛细水特性进行了系统的研究。结果表明,路基土中毛细水上升高度及毛细水上升引起的含水量增加都与土基的密实程度成反比;路基粉土填料因毛细水上升引起土体含水量的增加,会有微膨胀,从而降低压实土体的密实度和土体的强度;采用铺设土工防水板的方式可有效阻隔水对土基的侵润,阻断毛断细水的上升,达到保证路基填料含水量不发生变化,以确保压实路基土在运营使用中的路用强度不致降低。
Under the action of groundwater, a series of changes occur in the water content and the density of the silt subgrade filler. In particular, a strong capillary water rise, the greater harm to the subgrade. For this reason, we conducted a systematic study on the capillary water characteristics of silty subgrade in Huaibei area through field investigation and laboratory and field experiments. The results show that the increase of capillary water in subgrade soil and the increase of water content caused by the increase of capillary water are both inversely proportional to the compaction degree of soil foundation. The subgrade fillings, due to the increase of capillary water, Thereby reducing the compaction of soil compaction and soil strength; the use of geotextile waterproofing plate can effectively block the water infiltration of the soil-based, blocking the rise of hairy fine water to ensure that the water content of subgrade filler does not occur Changes in order to ensure compaction of subgrade soil in operation and use of road strength will not be reduced.