Backfilling construction method for slotted buried pipe foundation trench by adopting self-compacting backfill material

Abstract

The invention discloses a backfilling construction method for a slotted buried pipe foundation trench by adopting a self-compacting backfill material. The backfilling construction method comprises the following steps of: step 1, crushing construction waste aggregates, then adding fine-grained soil, a curing agent and an additive, and then stirring to form the self-compacting backfill material; step 2, carrying out pumping layered pouring on the self-compacting backfill material formed after stirring is completed, so that the buoyancy is smaller than the weight of a pipeline; and step 3, within 28 days after pouring is completed, controlling the unconfined compressive strength of the self-compacting backfill material to be 1MPa to 2MPa. According to the backfilling construction method disclosed by the invention, the self-compacting backfill material is prepared from the construction waste aggregates such as waste slurry and broken bricks, so that the purposes of waste utilization, energy conservation and environment protection are achieved, and meanwhile, the problems of sand source shortage and the like are also solved.

Description

technical field [0001] The invention relates to the technical field of foundation trench construction of slotted buried pipes, in particular to a construction method for backfilling foundation trenches of slotted buried pipes using self-compacting backfill. Background technique [0002] In the existing technology, the foundation groove of the buried pipe is generally backfilled with medium-coarse sand, and the compactness of the backfill is difficult to control, and human factors are very large, especially in the lower depression of the pipeline, it is difficult to use mechanical compaction, and manual compaction often reaches If the density requirement of the design is not met, the post-construction settlement will be large, and the pipeline will be deformed and cracked, which will seriously affect the normal use and service life of the pipeline. For drainage pipes, cracks in the pipes cause water and soil erosion, and then form holes, and ground subsidence occurs on the ro...

AI Technical Summary

Problems solved by technology

[0005] The main problem of the existing method is: backfilling with medium-coarse sand, it is difficult to control the compactness of the backfill, and the human factor is very large, especially in the lower recess of the pipeline, it is difficult to use mechanical compaction, and manual compaction often cannot reach the design compactness High degree requirements, resulting in large post-construction settlement, easy deformation and cracking of pipelines

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