交底內(nèi)容：
交底部位：工程起點(diǎn)—W2
1、 溝槽經(jīng)驗(yàn)收合格后，回填土石硝至差250mm到設(shè)計(jì)標(biāo)高，分層夯實(shí)。按設(shè)計(jì)要求，鋪設(shè)3.0米寬，0.25米厚，直徑為2~25mm的級(jí)配碎石，再鋪設(shè)20mm的粗砂，此時(shí)，砂石基礎(chǔ)標(biāo)高高于設(shè)計(jì)標(biāo)高20mm，備于管道自沉降。
管底必須與砂石平基及管座緊密接觸，石子與管皮不得直接接觸，施工期間，槽底不準(zhǔn)受水浸泡，平基厚度允許偏差為±20mm之間。墊層厚度不得小于設(shè)計(jì)規(guī)定。
Cards on the table contents:
Cards on the table position: Project start-W2
1, trench after their acceptance, poor backfill debris nitrate to 250mm to the design elevation, hierarchical compaction. According to the design, the laying of 3.0 meters wide and 0.25 m thick with a diameter of 2 ~ 25mm graded crushed stone, and then laying 20mm of coarse sand, this time, based on elevation higher than the design elevation gravel 20mm, prepared in the pipeline from the settlement.
Sand pipe end must be in close contact Dan Pingji and seat tube, gravel and pipe shall not direct contact with skin, the construction period, are not allowed to be immersed in water bottom, flat base to allow deviation of ± 20mm thickness between. Cushion thickness of not less than the design requirements.

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