Backfill for checking peripheral settlement of wells and pipelines and preparation method of backfill

Abstract

The invention discloses backfill for checking peripheral settlement of wells and pipelines and a preparation method of the backfill. The backfill consists of 0.5 percent of cement, 0.005 percent of water reducing agent, 20 percent of coal ash and 79.45 percent of undisturbed soil. During field preparation, every eight shovels of undisturbed soil are blended with every five shovels of coal ash, every forty shovels of coal ash are blended with a shovel of cement, the blending ratio of the manually filled water reducing agent is 1 percent of the cement amount, and the undisturbed soil, coal ash, cement and a water reducing agent are uniformly mixed. When the peripheral settlement of wells and pipelines is backfilled by adopting the backfill, the construction process is simple, the cost is low, and various test indexes accord with design specification requirements. Meanwhile, by utilizing the coal ash, the environmental pollution is reduced, the raw materials are saved, the cost of a thermal power plant used for storing the coal ash is saved, the construction cost is reduced, the soil land acquisition is reduced, the difficulty of land tension is relieved, and the backfill has obvious economic benefits and social benefits and has wide application and popularization prospects.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a backfill used for settlement around inspection wells and pipelines and a preparation method thereof. Background technique [0002] Due to climate and other factors, the backfilling of various pipelines and well circles in municipal engineering has a common problem of sinking due to changes in stiffness coefficients, and the backfilled part cannot be effectively connected with the road surface. , the waste of raw materials is serious, the cost is high, and it is difficult for various test indicators to meet the requirements of the design specifications, and it is easy to rework due to defects such as decline. [0003] Fly ash is a non-caking material with light weight, porosity, uniform particles and certain water stability, and its road performance meets the technical requirements of road construction specifications. Fly ash has the advantages of light we...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a kind of backfill for checking the settlement around wells and pipelines and its preparation method, aiming to solve the common problem of subsidence in the backfill of various pipelines and well circles in municipal engineering due to the change of stiffness coefficient due to climate and other factors , the backfill part cannot be effectively connected with the road surface. At the same time, the construction process of the existing backfill pipeline, well circle, platform back, etc. is complicated, the waste of raw materials is serious, the cost is high, and it is difficult for various test indicators to meet the requirements of the design specifications.

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