CN114658082A - Foundation construction method for water supply and drainage pipeline in high backfill region outside small compartment - Google Patents

Abstract

The invention discloses a construction method for a water supply and drainage pipeline foundation of a high backfill region outside a small compartment, and belongs to the technical field of pipeline construction. The invention utilizes the change of the influence of the sedimentation of the high backfilling area on the foundation of the water supply and drainage pipeline to transmit the stability of the foundation of the water supply and drainage pipeline to a rigid surface layer or original soil, adopts medium coarse sand backfilling to solve the problem of automatic filling of a gap between the settled backfill soil and the foundation of the water supply and drainage pipeline in the later period, does not influence the normal use of the water supply and drainage pipeline even if the backfilled soil is settled, eliminates the phenomena of deformation, dislocation, blockage and the like of the water supply and drainage pipeline in the later period of use, saves the later period maintenance cost, and can ensure the engineering quality of the water supply and drainage pipeline in a small area, thereby realizing the high-quality target of long-term maintenance-free after completion and obtaining good safe production atmosphere and social reputation.

Description

Foundation construction method for water supply and drainage pipeline in high backfill region outside small compartment

Technical Field

The invention relates to the technical field of pipeline construction, in particular to a method for constructing a water supply and drainage pipeline foundation of a high backfill region outside a small compartment.

Background

At present, the requirements of Chinese people on living environment and cell quality are higher and higher, the cell scale is larger and larger, and how to take and use correct related processes in pertinence in the cell external engineering under the conditions of special areas and high-fall terrains directly concerns the installation quality of the cell water supply and drainage pipeline engineering, and is very necessary for avoiding later-stage pipeline deformation, blockage and disjointed repair.

Before the foundation construction of the water supply and drainage pipeline in a residential area, a water supply and drainage pipeline foundation construction drawing which is economical and meets site conditions is designed through calculation, backfill soil is generally designed to be compacted in a layering mode, a sand cushion layer is laid, then pipeline installation is carried out, the two sides of a medium coarse sand pipeline are backfilled to be one third of the height of the pipeline, and finally plain soil backfilling is carried out. The method is very practical for the conventional district backfill environment, but a site for a high backfill area has certain defects, because a backfill layer is thick, and human and machine factors are added, the too thick backfill soil cannot meet the compaction requirement, no matter how the backfill soil is compacted, the possibility of settlement can be generated in the later stage, no specific measure is taken, the construction quality of district water supply and drainage pipeline engineering is easily influenced, and the later-stage water supply and drainage pipeline is settled, disconnected, damaged and blocked in the using process. Therefore, only one method for constructing the foundation of the water supply and drainage pipeline in the high backfill region outside the small region is invented, the influence of the sedimentation factor of the backfill soil on the base layer of the water supply and drainage pipeline is eliminated, and the construction quality of the water supply and drainage pipeline engineering of the small region is ensured.

Disclosure of Invention

1. Problems to be solved

Aiming at the defects and shortcomings in the prior art, the invention provides a construction method for the foundation of the water supply and drainage pipeline in the high backfill region outside the small compartment, which avoids the influence on the use quality of the water supply and drainage pipeline in the later period caused by backfill settlement of the high backfill region due to improper measures, reduces the economic loss and the damage to the reputation of an enterprise caused by the dislocation and even blockage of the water supply and drainage pipeline caused by settlement to the maximum extent, improves the popularity of construction enterprises, and solves the problems that the existing conventional construction method scheme for the water supply and drainage pipeline in the small compartment process cannot meet the use requirements in the later period and the like.

2. Technical scheme

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

a construction method for a water supply and drainage pipeline foundation of a high backfill region outside a small compartment comprises the following steps:

the method comprises the following steps: backfilling plain soil on a construction site or a construction road, and compacting layer by layer according to the requirements of the outside map paper of the small compartment;

step two: positioning and paying off according to a drawing of the water supply and drainage pipeline, and excavating a pipeline groove, wherein the elevation of the bottom of the groove is lower than that of the drainage pipeline by 150 mm and meets the gradient of the water supply and drainage pipeline designed according to the drawing;

step three: the RD50 round anti-corrosion fir is nailed along the center line of the pipeline groove at intervals of 2m, the round anti-corrosion fir is nailed to a construction site or a construction road directly, and the distance from the top of the RD50 round anti-corrosion fir to the bottom of the water supply and drainage pipe is 100 mm;

step four: pouring 150 mm thick equilateral inverted triangle C25 reinforced concrete along the center line of the pipeline groove, internally matching phi 8 bidirectional steel bars, and pouring RD50 circular anti-corrosion fir wood in the reinforced concrete at a spacing of 250 mm;

step five: sequentially installing the water supply and drainage pipes, adopting medium coarse sand to backfill after concealment and acceptance check, and tamping the materials in layers to a position of 150 mm at the top of the water supply and drainage pipes;

step six: and backfilling and compacting the residual pipeline groove plain soil layer by layer.

3. Advantageous effects

Compared with the prior art, the invention has the beneficial effects that:

the invention relates to a construction method for a water supply and drainage pipeline foundation in a small-compartment external high backfill region, which is characterized in that the influence of the settlement of the high backfill region on the water supply and drainage pipeline foundation is changed, the stability of the water supply and drainage pipeline foundation is transmitted to a rigid surface layer or original soil, medium coarse sand is adopted for backfilling, the automatic filling of a gap between the backfilled and settled plain soil and the water supply and drainage pipeline foundation in the later period is solved, the normal use of the water supply and drainage pipeline is not influenced even if the backfilled soil is settled, the phenomena of deformation, dislocation, blockage and the like of the water supply and drainage pipeline in the later period in the use process are eliminated, the later period maintenance cost is saved, the engineering quality of the water supply and drainage pipeline in the small-compartment is ensured, the high-quality target which does not need to be maintained for a long time after completion is realized, and good safe production atmosphere and social reputation are obtained.

Drawings

FIG. 1 is a schematic side view of a construction configuration of the present invention;

fig. 2 is a front view schematically illustrating the construction structure of the present invention.

Detailed Description

The invention will be further described with reference to specific embodiments and the accompanying drawings in which:

example 1

As shown in fig. 1-2, the method for constructing a foundation of a water supply and drainage pipeline in a small-compartment external high backfill region of the embodiment includes the following steps:

the method comprises the following steps: according to the requirements of the outside map paper of the small room, backfilling plain soil on a construction site or a construction road 1, and compacting by layers 2;

step two: positioning and paying off according to a drawing of a water supply and drainage pipeline 5, excavating a pipeline groove 8, wherein the elevation of the bottom of the pipeline groove 8 is lower than 5150 mm of a drainage pipeline, and the slope of the water supply and drainage pipeline 5 is in accordance with the design of the drawing;

step three: the RD50 round anti-corrosion fir wood 3 is nailed along the center line of the pipeline groove 8 at intervals of 2m, the round anti-corrosion fir wood is directly nailed to a construction site or a construction road 1, and the distance from the top of the RD50 round anti-corrosion fir wood 3 to the bottom of the water supply and drainage pipe 5 is 100 mm;

step four: pouring 150 mm thick equilateral inverted triangle C25 reinforced concrete 4 along the central line of the pipeline groove 8, internally matching phi 8 bidirectional steel bars, and pouring 3 RD50 circular anti-corrosion fir wood at a spacing of 250 mm;

step five: sequentially installing a water supply and drainage pipe 5, adopting medium coarse sand to backfill 6 after concealment and acceptance, and tamping the mixture layer by layer to a position of 150 mm at the top of the water supply and drainage pipe 5;

step six: and backfilling and layering tamping 7 with the residual pipeline trench 5 with plain soil.

The working principle of the embodiment is as follows: the influence of the sedimentation of a high-backfill region on the foundation of the water supply and drainage pipeline is changed, the stability of the foundation of the water supply and drainage pipeline is transmitted to a rigid surface layer or original soil, medium coarse sand is adopted for backfilling, the problem that gaps between the backfilled and settled plain soil and the foundation of the water supply and drainage pipeline are automatically filled in the later period is solved, the normal use of the water supply and drainage pipeline can be ensured even if the backfilled soil is settled is avoided, the later-period maintenance cost is saved, and the engineering quality of the water supply and drainage pipeline of a residential area can be ensured.

The invention relates to a construction method for a water supply and drainage pipeline foundation in a small-compartment external high backfill region, which is characterized in that the influence of the settlement of the high backfill region on the water supply and drainage pipeline foundation is changed, the stability of the water supply and drainage pipeline foundation is transmitted to a rigid surface layer or original soil, medium coarse sand is adopted for backfilling, the automatic filling of a gap between the backfilled and settled plain soil and the water supply and drainage pipeline foundation in the later period is solved, the normal use of the water supply and drainage pipeline is not influenced even if the backfilled soil is settled, the phenomena of deformation, dislocation, blockage and the like of the water supply and drainage pipeline in the later period in the use process are eliminated, the later period maintenance cost is saved, the engineering quality of the water supply and drainage pipeline in the small-compartment is ensured, the high-quality target which does not need to be maintained for a long time after completion is realized, and good safe production atmosphere and social reputation are obtained.

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, to which the actual method is not limited. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.

Claims (1)

1. A method for constructing a water supply and drainage pipeline foundation of a high backfill region outside a small compartment is characterized by comprising the following steps of: the method comprises the following steps:

the method comprises the following steps: backfilling plain soil on a construction site or a construction road, and compacting layer by layer according to the requirements of the outside map paper of the small compartment;

step two: positioning and paying off according to a drawing of the water supply and drainage pipeline, and excavating a pipeline groove, wherein the elevation of the bottom of the groove is lower than that of the drainage pipeline by 150 mm and meets the gradient of the water supply and drainage pipeline designed according to the drawing;

step three: the RD50 round anti-corrosion fir is nailed along the center line of the pipeline groove at intervals of 2m, the round anti-corrosion fir is nailed to a construction site or a construction road directly, and the distance from the top of the RD50 round anti-corrosion fir to the bottom of the water supply and drainage pipe is 100 mm;

step four: pouring 150 mm thick equilateral inverted triangle C25 reinforced concrete along the center line of the pipeline groove, internally matching phi 8 bidirectional steel bars, and pouring RD50 circular anti-corrosion fir wood in the reinforced concrete at a spacing of 250 mm;

step five: sequentially installing the water supply and drainage pipes, adopting medium coarse sand to backfill after concealment and acceptance check, and tamping the materials in layers to a position of 150 mm at the top of the water supply and drainage pipes;

step six: and backfilling and compacting the residual pipeline groove plain soil layer by layer.

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