路基路面工程(国外英文资料).docVIP

路基路面工程(国外英文资料) Code 02407 road surface project It is required that the road base road surface have the following basic properties (1) stability (2) stability (3) durability (4) surface smoothness (5) surface resistance. 2. Our country highway formed on the basis of the soil particle composition characteristics, the plasticity index of soil and soil organic matter is, divided into giant clay soil, coarse grained soil, four types of special soil of fine grained soils. The sandy soil is not plastic, the water is strong, the capillary rise is small, it has a large internal friction coefficient, and the strength and water stability are good. 4. Sand soil contains a certain number of coarse particle, and contains a certain amount of fine particles, grading is appropriate, strength, stability and so on all can meet the requirements, is the ideal of subgrade filling material. The powder soil contains more silt particles, which may be mucous but easily broken and easily become flow when immersed in water. Powdery soil hair is very strong and the hair is up (up to 1.5m), which can cause freezing and swelling in seasonal frozen areas. Pink soil is a bad highway. 6. Viscous soil fine particle content, soil and cohesion of the internal friction coefficient of small, small permeability and water absorption ability, capillarity, have bigger plasticity. The viscous soil is hard when it is dry, it is not easy to break in construction, it can stay hydrated in the long term, not volatile, and therefore the carrying capacity is small. The roadbed can also be stabilized for viscous soil, which is fully compacted and equipped with good drainage when appropriate moisture content. The highway nature division divides according to the following three principles: (1) the principle of similar characteristics of road engineering (2) the principle of difference in surface climate zones (3) natural climate factors are both comprehensive and dominant. The second-class division is based on the moi