機械回填土工藝標準.doc

機械回填土工藝標準
1 范  圍
本工藝標準適用于工業及民用建筑物、構筑物大面積平整場地、大型基坑和
管溝等回填土。
2 施工準備
2．1  材料及主要機具：
2．1．1  碎石類土、砂土（使用細砂、粉砂時應取得設計單位同意）和baopo石碴，可用作表層以下填料。其最大粒徑不得超過每層鋪填厚度的2/3或3/4（使用振動碾時），含水率應符合規定。
2．1．2  粘性土應檢查其含水率，必須達到設計控制范
Mechanical back fill process standards
1 Scope
This technology is applicable to industrial and civil buildings, structures large flat space, large pit and
Pipe trench backfill.
2 construction preparation
2.1 Materials and main equipment:
2.1.1 gravel type of soil, sand (with fine sand and silt units should be designed to obtain consent) and blasting stone ballast, the following can be used as filler surface. The maximum size shall not exceed the thickness of each layer filling of 2 / 3 or 3 / 4 (when using the vibrating roller), moisture content should be specified.
2.1.2 Cohesive should check their water content, must meet the design control Fan

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