Construction method of municipal road pipelines

Abstract

The invention relates to the field of municipal pipeline construction, in particular to a construction method of municipal road pipelines. The construction method comprises the steps that S1, trenchesare excavated; S2, the bottoms of the trenches are leveled; S3, pipeline seats are placed; S4, pipeline units are hoisted; S5, cement mortar is coated on the outer walls of the joints of the adjacentpipeline units; S6, after concrete connecting pipes are solidified, the trenches are filled with gravels; S7, slurries are poured into the trenches until the slurry level is higher than the gravels;S8, the tops of the trenches are completely covered with waterproof materials, and then still standing is conducted for at least 3 d; S9, the trenches are backfilled with soil to the soil layer heighthigher than the original pavement; S10, the backfilled soil is compacted to form a road soil layer; S11, the height of the road soil layer is adjusted to meet the road design requirements; and S12, roads are paved. The construction method has the effects that the municipal road pipelines are not prone to bending and breaking due to local stress, the structure is stable, leakage is not prone occurring, the pavement is stably supported, and the quality of the municipal roads and the municipal road pipelines is good.

Description

technical field [0001] The invention relates to the technical field of municipal pipeline construction, in particular to a municipal road pipeline construction method. Background technique [0002] Municipal road pipelines are municipal pipelines buried under municipal roads along the direction of municipal roads. At present, municipal road pipelines can be mainly used to transport fluids or install wires and cables. [0003] Existing municipal road pipelines usually excavate trenches on the road surface, then install several pipe seats in the trenches, leave a certain distance between adjacent pipe seats, and then hoist the pipes to the pipe seats in the trenches for installation. After the pipeline is installed, backfill the soil and compact it, and then repair the road surface. [0004] The above-mentioned existing technical solutions have the following defects: However, because the pipe seat is placed in the trench, there is a space between the pipe and the bottom of th...

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Problems solved by technology

[0004] The above-mentioned existing technical solutions have the following defects: However, because the pipe seat is placed in the trench, there is a space between the pipe and the bottom of the trench, and since the municipal road needs to be occupied during construction, in order to avoid affecting traffic, usually the excavated The width of the trench will be closer to the diameter of the buried pipeline to reduce the excessive traffic occupation caused by excessive trench excavation, resulting in a gap between the pipeline and the side wall and bottom wall of the trench, but the distance is not large

[0005] When backfilling the soil, because the soil is viscous and has poor fluidity, it can only compact the surface soil when compacted by a road roller, especially the soil below the pipeline axis is likely to have many gaps, and because the pipeline is For those buried under the road, the road needs to be repaired above the pipeline, and the weight of the vehicle and the impact caused by the vehicle's driving need to be carried. Since the pipeline is just below the road, the force on the road will be transmitted to the pipeline, and due to the nearby pipeline If the soil is not dense enough, the soil will not have enough supporting force as a reaction force to support the pipeline, so that the pipeline may be bent due to local force, especially the connection between adjacent pipeline units is the weak point of the pipeline, which may There is still room for improvement in cases where pipes break and leak at the joints of adjacent pipe units, and even cause road surface depressions

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