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3 Operation process 3.1 Process flow:
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For example, on foundation pits (trenches) or pipe trench slopes, nail horizontal plates every 3m; Snap horizontal lines on interior and apron side walls or nail elevation control stakes on the floor.
should be inspected and accepted, and the hidden inspection procedures should be completed.
Construction Preparation 2.1 Materials and Main Machines and Tools: 2.1.1 Soil: Priority should be given to using the soil excavated from the foundation trench, but it should not contain organic impurities.
2.1.2 Main machines include: frog or diesel rammer, trolley, screen (aperture 40~60mm), wood rake, shovel (pointed and flat head), 2m guiding rule, rubber hose, small wire, wood folding rule, etc.
What can shield you from the wind and rain can also make you invisible.
2.2 Operating conditions: 2.2.1 Prior to construction, parameters such as the control range of moisture content of fill soil, virtual paving thickness, and compaction times should be reasonably determined based on project characteristics, type of fill soil, compactness requirements, and construction conditions; The parameters of important backfill earthworks shall be determined through compaction tests.
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2.2.4 Before construction, horizontal marks should be made to control the height or thickness of the backfill.
The foundation concrete strength shall meet the specified requirements before backfilling.
2.2.2 Before backfilling, the foundation, box foundation wall, or underground waterproof layer, protective layer, etc.
Become an engineer with strength, temperature, attitude, and depth.
2.2.3 Backfilling of the room core and pipe trench should be carried out after completing the installation of water supply, drainage, gas pipelines, and reinforcement between pipe trench walls.
Clean up the ponding and organic matter on the trench and floor.
Disclosure content: Manual backfill 1 Scope This process standard is applicable to manual backfill of foundation pits, foundation trenches, indoor floors, pipe trenches, outdoor fertilizer trenches, and aprons in general industrial and civil buildings.
Before use, it should be sieved with a particle size of no more than 50mm and a moisture content that meets the requirements.
