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路基边坡的稳定,无疑是与山体和填土的岩土性质有关,但处于湿润带低气压经路的日本,因雨水而引起的坡面病害也很显著,其防护对策已成为设计和施工方面的重要课题。作为土质斜坡的防护,自然是以原生植物最为理想,但在现实的坡面防护实施中,有些场合由于土质、气象和环境等条件的限制,不能施行植物防护。如细砂土、白砂(火山灰堆积)和山砂等,因其土质瘠瘦,保肥保水性差,均不适于植物生长,有些土如火山灰质粘土,虽可生长植物,但因含水量高,常因冻害而引起坡面剥落。这种土又多是酸性土,也不
The stability of the subgrade slope is undoubtedly related to the geotechnical properties of the mountain and the earth filling. However, in Japan, where the humid zone is exposed to low pressure, the slope disease caused by rainwater is also significant, and its countermeasures have become the design and construction An important issue in the area. As the protection of soil slopes, native plants are naturally the most ideal, but in actual slope protection implementation, some occasions due to soil, weather and environmental conditions, can not be implemented plant protection. Such as fine sand, white sand (volcanic ash accumulation) and mountain sand, because of its poor soil fertility, poor fertilizer retention, are not suitable for plant growth, some soil, such as volcanic clay, although plants can grow, but because of high water content, Frost damage often caused by the slope of the surface. This soil is mostly acidic soil, nor