回填土（Back fill）.docVIP

回填土（Back fill） Main construction method 6.1 construction process 6.1.1 fertilizer trough backfill: select soil, sieve soil, mix 2, 8 lime soil, ground cleaning, paving the first step, dust soil, 800 wide, shop the first step, soil, compaction, sampling, acceptance, paving, second steps, lime soil...... The last step of the paving is the lime soil, the width of the 800 width is paved outside, and the last step is the plain soil 6.1.2 garage roof backfill: soil selection, cleaning the base, laying the first step, soil, tamping, sampling, acceptance, paving second steps, soil and soil...... Paving the last step, lime soil, tamping, sampling and acceptance 6.1.3 the south side of the 46 axis and 47 axis external groove backfill: base cleaning, laying the first layer of concrete - vibrating - laying second layers of concrete...... Shop the last layer of concrete - vibrating 6.1.4 room core backfill: soil selection, cleaning the base, laying the first step, plain soil, tamping, sampling, acceptance, laying second steps, soil and soil...... The last step is to consolidate the soil, to consolidate the soil, to collect the sample, to examine and approve it, to sieve and mix 3: 7 lime soil, to pave the lime soil, to tamp the sample and to examine it 6.2 construction methods 6.2.1 trough backfill (except South Side) The 800 mm range of the backfill tank is 2 to 8 lime soil, and 800 mm is plain soil. The original soil backfill shall comply with the relevant provisions on the design requirements and construction specifications, before construction according to the specifications required to sift (backfill soil when the particle size is less than 50mm, dust particle size less than 20mm), should be kept in the soil sieving slot or dust must be in the groove on the mixing ratio; as the volume ratio of lime (2: 8), mixing lime soil must be standard bucket, strictly control the mix. Mix evenly at the same time, at least two times mixing; the original soil moisture content is too smal