Pipeline groove excavation construction method

Abstract

The invention relates to a pipeline groove excavation construction method. The method includes the following steps that S1, measuring and paying off are conducted; S2, groove excavating is conducted,wherein excavating is conducted till a groove bottom is reached according to slope gradient coefficient of an earth slope; S3, groove bottom strengthening treatment is conducted, wherein a calcium chloride solution is injected into the groove bottom of a groove, after the calcium chloride solution is immersed into the groove bottom, a sodium bicarbonate solution is injected into the groove, and the molar ratio of the sodium bicarbonate solution and the calcium chloride solution is larger than 2; S4, water discharging of the groove is conducted, wherein water in the groove is discharged out; S5, the groove is compacted, wherein the groove bottom of the groove is compacted, and after the groove bottom is compacted, discharged air is aired; sixthly, a water discharging pipeline is installed,and the water discharging pipeline is lifted to the groove bottom to be spliced; and S7, soil backfilling is conducted, sand is adopted for backfilling and compacting, and the soil is backfilled to the in-place elevation. The clearances in the soil are filled with calcium carbonate generated by the reaction of the calcium chloride solution and the sodium bicarbonate solution, gravel or concrete serving as cushion materials is reduced, the depth does not need to be reserved for the cushion materials, and then the excavation depth is relatively reduced.

Description

technical field [0001] The invention relates to the technical field of pipeline installation, in particular to a pipeline trench excavation construction method. Background technique [0002] With the continuous expansion of the city scale, the water supply and drainage pipeline project, as one of the infrastructures of urban development, is one of the basic guarantees to promote urban development and meet people's daily needs. [0003] Currently, the laying of municipal sewer pipes involves the following steps: [0004] S1, measuring and setting out: setting out the groove position and slope line; [0005] S2. Trench excavation: When the depth of the trench is less than 3m, adopt the large excavation method of slope grading, and the slope coefficient is 1:0.5. Coefficient 1: 0.5, and steel sheet piles or wooden sheet piles are used for support; [0006] S3. Foundation pouring: cleaning the bottom of the tank and pouring a concrete cushion; [0007] S4. Pipeline installat...

AI Technical Summary

Problems solved by technology

[0010] The above-mentioned existing technical solutions have the following defects: in the foundation pouring step, a large amount of concrete needs to be poured as a cushion, and the material cost is relatively high

And when the trench is excavated, it is necessary to reserve a depth for the concrete cushion, so the trench needs to be excavated deeper, which increases the amount of work

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