土方回填施工技术交底记录.doc
交底内容:
1、在用搅拌桩进行复合地基处理的区域,回填前应挖除搅拌桩桩顶浮土,回填30cm厚砂砾材料,并碾压密实。
2、填方材料使用现场内开挖的材料,并保证其在规定的含水量状态下能被压实到设计规定的密实度。
3、填筑前要对路基、台背等进行基底清理,保证施工场地能按设计要求进行平整压实。
4、填土路基必须根据设计断面分层填筑压实,其分层填筑厚度必须与压实机具相适应,一般每层松土填土厚度不应超过30cm。路基填筑压实宽度不得小于设计宽度,以便最后削坡,严禁贴坡。
5、每一压实层均应检验压实度,合格后方可填筑上一层。否则应查明原因,采取措施进行补压。检验频率每2000m²检验8点,不足2000m²时,至少应检验两点,必须每点都符合施工规范(JTJ071--98)及设计要求。必要时可根据需要增加检验点。试验报告要注明土料种类、试验日期、试验结论及试验人员签字。未达到设计要求的部位应有处理方法和复验结果。
6、路基修筑前15天应在取土地点取样进行击实试验,确定其最
Cards on the table contents:
1, with mixing pile composite foundation of the region, mixing pile excavation before backfilling the top surface dust, gravel backfill material 30cm thick and compacted dense.
2, use of materials on-site fill material within the excavation and to ensure its state water content in the prescribed design requirements can be compacted to the density.
3, before filling of the foundation, basement, etc. Back of clean-up, to ensure construction site can be formed according to design requirements compaction.
4, the design section must fill embankment dam compaction layer, the thickness of the layer filling and compaction equipment to be adapted, generally should not exceed the thickness of each layer loose soil fill 30cm. Roadbed construction shall not be less than the design width of the width of compaction to the final cut slopes, slope paste strictly prohibited.
5, each compacted layer shall be test compaction, pass on the floor only after filling. Otherwise, to identify causes and take measures to fill pressure. Inspection frequency for each test 8:00 2000m ², less than 2000m ², at least two points should be examined, must conform to construction specifications for each point (JTJ071 - 98) and design requirements. Can be increased if necessary checkpoint. Soil test report should indicate the material type, test date, test findings and the signature test. The site does not meet the design requirements should be handling and retest results.
6, 15 days before the embankment construction sites should take soil samples for compaction tests to determine the most
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