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石灰土壤道路是用石灰和土壤拌合铺筑的,其经济造价较低,但可获得较高的力学强度。在北京市广渠门内的一段道路就是用石灰土壤铺成的,厚28公分。现在把施工中的一些体会和发现的问题介绍出来,以供大家研讨。一、材料1、土壤:土壤为石灰土壤中的主要材料,根据试验要占石灰土壤总重的85～88％。土质的选择及用量对石灰土壤的抗压强度、形变模量、抗冻性等关系很大。土壤的塑性指数不得大于25,流限不得大于45,小于0.005公厘的颗粒含量不得大于35％。细粒沙和粉沙用来作石灰土壤是不太适宜的。北京市广渠门内道路所用的土壤非常复杂,大致可分力四类,即:粉沙土、沙质垆坶、沙质粘土及耕土。根据工地试验结果如表1。
Lime soil roads are paved with lime and soil, which offers lower economic costs but higher mechanical strength. A section of the road in Beijing Guangqumen is paved with lime soil, 28 cm thick. Now some of the construction experience and problems found out for everyone to discuss. First, the material 1, soil: the soil is the main material in the lime soil, according to the test to account for 85 to 88% of the total weight of lime soil. Soil selection and dosage of lime soil compressive strength, modulus of deformation, frost resistance and so on. Soil plasticity index shall not exceed 25, the current limit shall not exceed 45, less than 0.005 mm of the particle content of not more than 35%. Fine sand and silt are used as lime soil is not suitable. The soil used in the roads in Guangqumen in Beijing is very complicated and roughly classified into four types: silt sand, sand grub, sandy clay and cultivated soil. According to the site test results in Table 1.