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在沙漠地带中,在路基材料缺乏的状况下,利用土工格室与现场砂土可有效提高沙漠道路的承载力,并能达到经济效益与路基的设计要求。为了解土工格室于砂土路基的加筋行为,分别进行了静态承载板载重试验与动态载重试验,探讨土工格室加筋后的承载能力与动态特性。与未加筋砂土比较,土工格室发挥良好之加筋效果,其能提高砂土的承载能力;于静态承载试验中,承载能力随着土工格室高度增加而提升,并有效减少沉降量之产生。在动态试验指出,土工格室加筋于砂土受动态反复作用下,增加土工格室高度,并不相对能提升加筋的承载成效。以动态载重试验反应公路的反复载重条件,对于沙漠公路设计使用土工格室加固路基时,得以选择具有经济效益的优化方案。
In the desert area, under the condition of the lack of subgrade materials, the utilization of geocell and on-site sand can effectively increase the bearing capacity of desert roads and achieve the economic benefits and design requirements of subgrade. In order to understand the behavior of geocell reinforced on sandy soil subgrade, static loading plate load test and dynamic loading test were carried out respectively to investigate the bearing capacity and dynamic characteristics of geocell reinforced. Compared with the unadulterated sand, geocell play a good reinforcement effect, which can improve the carrying capacity of sand; in the static load test, the carrying capacity increases with the geocell height and effectively reduce the settlement Produced. Dynamic tests show that geogrid reinforcement in the sand under dynamic repeated action to increase the geocell height does not increase the relative reinforcement of the bearing effect. With dynamic load test, the repeated loading condition of reactive highway is chosen. When using geocell to reinforce embankment in desert highway design, the optimization scheme with economic benefits can be selected.