市政道路工程中基层施工探讨（Discussion on grass-roots construction in municipal road engineering）.doc

市政道路工程中基层施工探讨（Discussion on grass-roots construction in municipal road engineering） Lime soil is one of the most widely used material for municipal road engineering application in road engineering application of the early effect and stable growth with age and growth of the strength, compaction and water stability, used as base (subbase), has obvious advantages, has important significance in economy and technology in this paper, the construction technology of lime base of municipal road engineering. A, construction preparation (a) preparation technology (1) the raw material test. In the lime soil base construction, should take the material field in representative soil samples of the following tests: particle analysis, liquid limit and plasticity index, compaction test, gravel or gravel crushing value, the content of organic matter (if necessary), phosphate content (if necessary). In addition, Magnesium Oxide also need effective calcium and lime content test. Such as gravel, gravel soil, gravel, gravel etc. following the poorly graded material, should first improve the gradation. (2) according to the quality of soil types and lime and lime mix to determine the optimum water content, maximum dry density. (3) 100m ~ 200m before the construction of the construction of the testing section, determine the combined effect of mechanical compaction, the compacting factor and construction method. (two) material requirements (1) soil: soil plasticity index to 10 ~ 20 of the cohesive soil is appropriate; with Lime Stabilized Graded Gravel, gravel, no non screening gravel plasticity index, clay should be added about 15%; clay plasticity index test is too large, should be crushed, crushed after maximum the size of the block should be less than 15mm. Soil organic matter content is less than 10%, 0.8% do not use lime sulphate content more than. Such as gravel, gravel, miscellaneous fill through trial decided to use a special type of soil. Crushed gravel or crushed stone value should