CN110106960B - Sewage pipeline construction method - Google Patents
Sewage pipeline construction method Download PDFInfo
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- CN110106960B CN110106960B CN201910492400.1A CN201910492400A CN110106960B CN 110106960 B CN110106960 B CN 110106960B CN 201910492400 A CN201910492400 A CN 201910492400A CN 110106960 B CN110106960 B CN 110106960B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L59/00—Compositions of polyacetals; Compositions of derivatives of polyacetals
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/04—Pipes or fittings specially adapted to sewers
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/06—Methods of, or installations for, laying sewer pipes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The invention relates to the technical field of pipelines, and provides a sewage pipeline construction method aiming at the problem of low efficiency in water pipeline construction, which comprises the following steps: the method comprises the following steps: s1, excavating a construction well; s2, installing a pipeline, which specifically comprises the following steps: drilling by a drilling machine to form a sewage pipe mounting hole communicated with adjacent construction wells, stopping the drilling once the drilling machine advances for 1-5m, and spraying a sewage pipe mixture on the wall of the hole to form the wall of the sewage pipe; s3, water leakage detection is carried out, and the method specifically comprises the following steps: spraying a sewage pipe mixture at the water leakage position according to the detection result to repair the leakage; and S4, building an inspection well. The sewage pipe mixture is sprayed on the hole wall to form the sewage pipe wall when the sewage and sewage pipe mounting hole is drilled, so that drilling and pipeline preparation are carried out synchronously, soil friction force does not need to be overcome, and the construction efficiency of the sewage pipe is greatly improved.
Description
Technical Field
The invention relates to the technical field of pipelines, in particular to a sewage pipeline construction method.
Background
The sewage pipe network is one of the important means for urban sewage discharge, and the main part for laying the sewage pipe network is the laying of underground sewage pipelines.
Generally, a pipe jacking process is usually adopted when a sewage pipeline is laid, because the pipe jacking process can effectively reduce the occupation of a road surface and the influence on traffic.
However, the pipe jacking process needs to overcome a large amount of friction force, so that the efficiency is low during sewage pipeline construction, and therefore, the improvement space is provided.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a sewage pipeline construction method which has the advantage of higher construction efficiency.
In order to achieve the purpose, the invention provides the following technical scheme:
a sewage pipeline construction method comprises the following steps:
s1, excavating a construction well;
s2, installing a pipeline, which specifically comprises the following steps:
drilling by a drilling machine to form a sewage pipe mounting hole communicated with adjacent construction wells, stopping the drilling once the drilling machine advances for 1-5m, and spraying a sewage pipe mixture on the wall of the hole to form the wall of the sewage pipe;
s3, water leakage detection is carried out, and the method specifically comprises the following steps:
spraying a sewage pipe mixture at the water leakage position according to the detection result to repair the leakage;
and S4, building an inspection well.
By adopting the technical scheme, the sewage pipe mixture is sprayed on the wall of the hole to form the wall of the sewage pipe while the sewage pipe mounting hole is drilled and dug, so that the drilling and the pipeline preparation are synchronously carried out, and the sewage pipe does not need to overcome the soil friction force, so that the drilling operation efficiency is greatly improved, and the construction efficiency of the sewage pipe is also greatly improved; stopping the drilling machine every 1-5m when the drilling machine advances, spraying a sewage pipe mixture on the wall of the hole, and supporting the sewage pipe mounting hole by using the wall of the sewage pipe so as to avoid the situation of collapse caused by that the sewage pipe mounting hole is dug too deeply; through the detection of leaking, the integrality of sewage pipe is guaranteed, and construction quality is guaranteed.
The invention is further configured to: in step S2, the sewage pipe mixture is sprayed to a thickness of at least 10 mm.
Through adopting above-mentioned technical scheme, guarantee the structural strength of sewage pipe wall, and then guaranteed the sewage pipe and supported the effect of sewage pipe mounting hole.
The invention is further configured to: in step S3, the continuity of the sewage pipe wall is detected by ultrasonic detection.
By adopting the technical scheme, the detection operation is very convenient through ultrasonic detection, the efficiency is improved, the detection result is ensured well, and the condition of missed detection is reduced.
The invention is further configured to: in the step S1, a construction well is set at a corresponding position of the inspection well in the design drawing, and in the step S4, concrete is poured into the construction well to form the inspection well.
Through adopting above-mentioned technical scheme, through building the construction well in inspection shaft department for need not excavation once more when building the inspection shaft, reduce the process step, improve the efficiency of construction.
The invention is further configured to: the sewage pipe mixture comprises the following components in parts by weight:
100 parts of polyformaldehyde;
30-36 parts of polyacrylonitrile;
30-36 parts of polyphthalamide.
By adopting the technical scheme, the physical property of the sewage pipe mixture is better by adopting the polyformaldehyde as the matrix, and the sewage pipe is ensured to have enough structural strength to support the sewage pipe mounting hole; by adding polyacrylonitrile and poly-collarbamide into polyformaldehyde and mixing in a specific proportion, the embrittlement temperature of the sewage pipe mixture is reduced, the low-temperature resistance of the sewage pipe is improved, the sewage pipe is better suitable for cold regions, and the applicability is wider.
The invention is further configured to: the sewage pipe mixture also comprises the following components in parts by weight:
10-15 parts of carbon fiber;
2-3 parts of glass fiber;
8-12 parts of ceramic powder.
Through adopting above-mentioned technical scheme, effectively increase the tensile strength of sewer pipe mixture through adding carbon fiber and glass fiber, through adding ceramic powder, effectively improve the compressive strength of sewer pipe mixture for the physical properties of sewer pipe can promote, and then ensures the sewage pipe better and supports the effect of sewer pipe mounting hole.
The invention is further configured to: the sewage pipe mixture also comprises the following components in parts by weight:
1-2 parts of tin powder;
0.5-1 part of copper powder;
5-10 parts of nano silicon dioxide.
By adopting the technical scheme, the sewage pipe has a certain heat preservation effect by adding the tin powder; copper powder is added, so that the sewage pipe has a certain heat conduction effect; by adding the nano silicon dioxide, the sewage pipe mixture has better thixotropy, and is not easy to flow after being sprayed on the hole wall, so that the wall thickness distribution of the sewage pipe is more uniform, and the quality of the sewage pipe is further ensured.
The invention is further configured to: the construction method of the sewage pipe mixture comprises the following steps:
a. grinding polyacrylonitrile and polyphthalamide to powder with particle size of 10-100 nm; grinding polyoxymethylene to particles with particle diameter of 0.1-1mm
b. Mixing polyformaldehyde particles, polyacrylonitrile powder and poly (phthalimide) powder to form a primary mixture;
c. and adding the initial mixture into an extrusion device, heating until the polyformaldehyde is molten, extruding and granulating to form a sewage pipeline mixture.
By adopting the technical scheme, the polyacrylonitrile and the polyphthalamide are crushed to the nanometer level, and the fused polyacrylonitrile and the polyphthalamide cannot be mixed with polyformaldehyde due to the high melting point of the polyacrylonitrile and the polyphthalamide after the polyformaldehyde is fused, so that the polyacrylonitrile and the polyphthalamide can be more easily and uniformly dispersed in the fused polyformaldehyde through the nanometer powder, and the effect of modifying the polyformaldehyde is ensured;
the thermal history of the sewage pipe mixture is effectively shortened and the condition of thermal degradation of the sewage pipe is reduced by grinding the polyformaldehyde into particles of 0.1-1mm, uniformly mixing the polyformaldehyde particles with the polyacrylonitrile powder and the polyphthalamide powder, and then adding the mixture into extrusion equipment for melting and mixing.
In conclusion, the invention has the following beneficial effects:
1. the sewage pipe mixture is sprayed on the wall of the hole to form the wall of the sewage pipe while the sewage pipe installation hole is drilled and dug, so that the drilling and the pipeline preparation are synchronously carried out, the soil friction force does not need to be overcome, and the construction efficiency of the sewage pipe is greatly improved;
2. stopping the drilling machine every 1-5m when the drilling machine advances, spraying a sewage pipe mixture on the wall of the hole, and supporting the sewage pipe mounting hole by using the wall of the sewage pipe so as to avoid the situation of collapse caused by that the sewage pipe mounting hole is dug too deeply;
3. by adding polyacrylonitrile and poly-collarbamide into polyformaldehyde and mixing in a specific proportion, the embrittlement temperature of the sewage pipe mixture is reduced, and the applicability of the sewage pipe is wider;
4. the tensile strength of the sewage pipe mixture is effectively increased by adding the carbon fibers and the glass fibers, and the compressive strength of the sewage pipe mixture is effectively improved by adding the ceramic powder, so that the physical properties of the sewage pipe are improved, and the effect of supporting the sewage pipe mounting hole by the sewage pipe is better guaranteed.
Drawings
FIG. 1 is a schematic flow diagram of a method of constructing a plurality of pipes according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1
A sewage conduit construction method, referring to fig. 1, comprising the steps of:
s1, excavating a construction well, which comprises the following specific steps:
and positioning according to the position of the inspection well in the design drawing, excavating the construction wells, and starting the next operation after excavating at least two adjacent construction wells.
S2, installing a pipeline, which specifically comprises the following steps:
drilling holes through a drilling machine, timely transporting soil damaged by the drilling machine out of the holes through soil excavation by an excavator, drilling and excavating sewage pipe mounting holes on the side wall of the construction well, and timely removing excavated soil;
the inner diameter of the sewage pipe mounting hole is 10mm larger than that of a sewage pipe in design, the inner wall of the sewage pipe is cleaned after the sewage pipe mounting hole is drilled and dug for 1m, and a sewage pipe composition is sprayed to form the wall of the sewage pipe;
when in spraying, the sewage pipe composition is firstly added into an extrusion device to be heated to 220 ℃, then extruded and sprayed on the inner wall of a mounting hole of the sewage pipe through a spray head, and the spraying thickness is 10 mm;
and repeating the drilling, digging and spraying operations until the sewage pipe mounting hole is communicated with the two adjacent construction wells.
S3, water leakage detection is carried out, and the method specifically comprises the following steps:
the sewage pipe is scanned by the ultrasonic scanner, and if the pipe wall of the sewage pipe is incomplete, the sewage pipe composition is sprayed again to complete filling, so that leakage repairing is performed on the sewage pipe.
S4, constructing an inspection well, which comprises the following steps:
and (3) building a pouring template in the construction well, pouring concrete to form the inner wall of the inspection well, keeping the communication between the sewage pipe and the detection well, and dismantling the template after the concrete is finally set to finish construction.
Example 2
The difference from example 1 is that
In step S2:
the inner diameter of the sewage pipe mounting hole is 15mm larger than that of the sewage pipe in design, the inner wall of the sewage pipe is cleaned after the sewage pipe mounting hole is drilled and dug for 2.5m, and the sewage pipe composition is sprayed to form the wall of the sewage pipe;
when in spraying, the sewage pipe composition is firstly added into an extrusion device to be heated to 240 ℃, then extruded and sprayed on the inner wall of a mounting hole of the sewage pipe through a spray head, and the spraying thickness is 15 mm;
example 3
The difference from example 1 is that
In step S2:
the inner diameter of the sewage pipe mounting hole is 18mm larger than that of the sewage pipe in design, the inner wall of the sewage pipe is cleaned after the sewage pipe mounting hole is drilled and dug for 5m, and a sewage pipe composition is sprayed to form the wall of the sewage pipe;
when in spraying, the sewage pipe composition is firstly added into an extrusion device to be heated to 260 ℃, then extruded and sprayed on the inner wall of a mounting hole of the sewage pipe through a spray head, and the spraying thickness is 18 mm;
example 4
A method of preparing a sewer pipe composition comprising the steps of:
a. respectively putting polyacrylonitrile, polyphthalamide and polyformaldehyde into a grinding machine for grinding, grinding the polyacrylonitrile and the polyphthalamide until the particle size is 10-100nm, and grinding the polyformaldehyde until the particle size is 0.1 +/-0.1 mm.
b. Adding 30kg of polyacrylonitrile powder, 30kg of polyphthalamide powder and 100kg of polyformaldehyde particles into a stirring kettle, sealing the stirring kettle, introducing nitrogen, exhausting air, stirring at the rotating speed of 30r/min for 10min, and uniformly stirring to form a primary mixture.
c. And adding the primary mixture into a double-screw extruder, heating to 200 ℃, extruding to an underwater pelletizer, and pelletizing to form the sewage pipe composition.
Example 5
A method of preparing a sewer pipe composition comprising the steps of:
a. respectively putting polyacrylonitrile, polyphthalamide and polyformaldehyde into a grinding machine for grinding, grinding the polyacrylonitrile and the polyphthalamide until the particle size is 10-100nm, and grinding the polyformaldehyde until the particle size is 0.1 +/-0.1 mm.
b. Adding 33kg of polyacrylonitrile powder, 33kg of polyphthalamide powder and 100kg of polyformaldehyde particles into a stirring kettle, sealing the stirring kettle, introducing nitrogen, exhausting air, stirring at the rotating speed of 30r/min for 10min, and uniformly stirring to form a primary mixture.
c. And adding the primary mixture into a double-screw extruder, heating to 200 ℃, extruding to an underwater pelletizer, and pelletizing to form the sewage pipe composition.
Example 6
A method of preparing a sewer pipe composition comprising the steps of:
a. respectively putting polyacrylonitrile, polyphthalamide and polyformaldehyde into a grinding machine for grinding, grinding the polyacrylonitrile and the polyphthalamide until the particle size is 10-100nm, and grinding the polyformaldehyde until the particle size is 0.1 +/-0.1 mm.
b. Adding 36kg of polyacrylonitrile powder, 36kg of polyphthalamide powder and 100kg of polyformaldehyde particles into a stirring kettle, sealing the stirring kettle, introducing nitrogen, exhausting air, stirring at the rotating speed of 30r/min for 10min, and uniformly stirring to form a primary mixture.
c. And adding the primary mixture into a double-screw extruder, heating to 200 ℃, extruding to an underwater pelletizer, and pelletizing to form the sewage pipe composition.
Example 7
A method of preparing a sewer pipe composition comprising the steps of:
a. respectively putting polyacrylonitrile, polyphthalamide and polyformaldehyde into a grinding machine for grinding, grinding the polyacrylonitrile and the polyphthalamide until the particle size is 10-100nm, and grinding the polyformaldehyde until the particle size is 0.1 +/-0.1 mm.
b. Adding 35kg of polyacrylonitrile powder, 31kg of polyphthalamide powder and 100kg of polyformaldehyde particles into a stirring kettle, sealing the stirring kettle, introducing nitrogen, exhausting air, stirring at the rotating speed of 30r/min for 10min, and uniformly stirring to form a primary mixture.
c. And adding the primary mixture into a double-screw extruder, heating to 200 ℃, extruding to an underwater pelletizer, and pelletizing to form the sewage pipe composition.
Example 8
A method of preparing a sewer pipe composition comprising the steps of:
a. respectively putting polyacrylonitrile, polyphthalamide and polyformaldehyde into a grinding machine for grinding, grinding the polyacrylonitrile and the polyphthalamide until the particle size is 10-100nm, and grinding the polyformaldehyde until the particle size is 0.1 +/-0.1 mm.
b. Adding 35kg of polyacrylonitrile powder, 31kg of polyphthalamide powder, 100kg of polyformaldehyde particles, 10kg of carbon fibers, 2kg of glass fibers, 8kg of ceramic powder, 1kg of tin powder, 0.5kg of copper powder and 5kg of nano silicon dioxide into a stirring kettle, sealing the stirring kettle, introducing nitrogen, exhausting air, stirring at the rotating speed of 30r/min for 10min, and uniformly stirring to form a primary mixture.
c. And adding the primary mixture into a double-screw extruder, heating to 200 ℃, extruding to an underwater pelletizer, and pelletizing to form the sewage pipe composition.
The carbon fiber length is 10 mm.
The glass fiber length was 3 mm.
Example 9
A method of preparing a sewer pipe composition comprising the steps of:
a. respectively putting polyacrylonitrile, polyphthalamide and polyformaldehyde into a grinding machine for grinding, grinding the polyacrylonitrile and the polyphthalamide until the particle size is 10-100nm, and grinding the polyformaldehyde until the particle size is 0.1 +/-0.1 mm.
b. Adding 35kg of polyacrylonitrile powder, 31kg of polyphthalamide powder, 100kg of polyformaldehyde particles, 12.5kg of carbon fibers, 2.5kg of glass fibers, 10kg of ceramic powder, 1.5kg of tin powder, 0.75kg of copper powder and 7.5kg of nano silicon dioxide into a stirring kettle, sealing the stirring kettle, introducing nitrogen, discharging air, stirring at the rotating speed of 30r/min for 10min, and uniformly stirring to form a primary mixture.
c. And adding the primary mixture into a double-screw extruder, heating to 200 ℃, extruding to an underwater pelletizer, and pelletizing to form the sewage pipe composition.
The carbon fiber length is 15 mm.
The glass fiber length was 2 mm.
Example 10
A method of preparing a sewer pipe composition comprising the steps of:
a. respectively putting polyacrylonitrile, polyphthalamide and polyformaldehyde into a grinding machine for grinding, grinding the polyacrylonitrile and the polyphthalamide until the particle size is 10-100nm, and grinding the polyformaldehyde until the particle size is 0.1 +/-0.1 mm.
b. Adding 35kg of polyacrylonitrile powder, 31kg of polyphthalamide powder, 100kg of polyformaldehyde particles, 15kg of carbon fibers, 3kg of glass fibers, 12kg of ceramic powder, 2kg of tin powder, 1kg of copper powder and 10kg of nano silicon dioxide into a stirring kettle, sealing the stirring kettle, introducing nitrogen, exhausting air, stirring at the rotating speed of 30r/min for 10min, and uniformly stirring to form a primary mixture.
c. And adding the primary mixture into a double-screw extruder, heating to 200 ℃, extruding to an underwater pelletizer, and pelletizing to form the sewage pipe composition.
The carbon fiber length is 20 mm.
The glass fiber length was 5 mm.
Example 11
A method of preparing a sewer pipe composition comprising the steps of:
a. respectively putting polyacrylonitrile, polyphthalamide and polyformaldehyde into a grinding machine for grinding, grinding the polyacrylonitrile and the polyphthalamide until the particle size is 10-100nm, and grinding the polyformaldehyde until the particle size is 0.1 +/-0.1 mm.
b. Adding 35kg of polyacrylonitrile powder, 31kg of polyphthalamide powder, 100kg of polyformaldehyde particles, 13kg of carbon fibers, 2kg of glass fibers, 9kg of ceramic powder, 2kg of tin powder, 1kg of copper powder and 8kg of nano silicon dioxide into a stirring kettle, sealing the stirring kettle, introducing nitrogen, exhausting air, stirring at the rotating speed of 30r/min for 10min, and uniformly stirring to form a primary mixture.
c. And adding the primary mixture into a double-screw extruder, heating to 200 ℃, extruding to an underwater pelletizer, and pelletizing to form the sewage pipe composition.
The carbon fiber length is 10 mm.
The glass fiber length was 2 mm.
Comparative example 1
A method of preparing a sewer pipe composition comprising the steps of:
a. respectively putting the polyphthalamide and the polyformaldehyde into a grinder for grinding, grinding the polyacrylonitrile and the polyphthalamide until the particle size is 10-100nm, and grinding the polyformaldehyde until the particle size is 0.1 +/-0.1 mm.
b. 31kg of polyphthalamide powder, 100kg of polyformaldehyde particles, 13kg of carbon fibers, 2kg of glass fibers, 9kg of ceramic powder, 2kg of tin powder, 1kg of copper powder and 8kg of nano silicon dioxide are added into a stirring kettle, the stirring kettle is closed, nitrogen is introduced, air is discharged, then the mixture is stirred for 10min at the rotating speed of 30r/min, and a primary mixture is formed after the mixture is uniformly stirred.
c. And adding the primary mixture into a double-screw extruder, heating to 200 ℃, extruding to an underwater pelletizer, and pelletizing to form the sewage pipe composition.
The carbon fiber length is 10 mm.
The glass fiber length was 2 mm.
Comparative example 2
A method of preparing a sewer pipe composition comprising the steps of:
a. respectively putting polyacrylonitrile and polyformaldehyde into a grinder for grinding, grinding the polyacrylonitrile and the polyphthalamide until the particle size is 10-100nm, and grinding the polyformaldehyde until the particle size is 0.1 +/-0.1 mm.
b. Adding 35kg of polyacrylonitrile powder, 100kg of polyformaldehyde particles, 13kg of carbon fibers, 2kg of glass fibers, 9kg of ceramic powder, 2kg of tin powder, 1kg of copper powder and 8kg of nano silicon dioxide into a stirring kettle, sealing the stirring kettle, introducing nitrogen, discharging air, stirring at the rotating speed of 30r/min for 10min, and uniformly stirring to form a primary mixture.
c. And adding the primary mixture into a double-screw extruder, heating to 200 ℃, extruding to an underwater pelletizer, and pelletizing to form the sewage pipe composition.
The carbon fiber length is 10 mm.
The glass fiber length was 2 mm.
Comparative example 3
A method of preparing a sewer pipe composition comprising the steps of:
a. grinding polyformaldehyde in a grinder, grinding polyacrylonitrile and polyphthalamide to particle size of 10-100nm, and grinding polyformaldehyde to particle size of 0.1 +/-0.1 mm.
b. Adding 100kg of polyformaldehyde particles, 13kg of carbon fibers, 2kg of glass fibers, 9kg of ceramic powder, 2kg of tin powder, 1kg of copper powder and 8kg of nano silicon dioxide into a stirring kettle, sealing the stirring kettle, introducing nitrogen, exhausting air, stirring at the rotating speed of 30r/min for 10min, and uniformly stirring to form a primary mixture.
c. And adding the primary mixture into a double-screw extruder, heating to 200 ℃, extruding to an underwater pelletizer, and pelletizing to form the sewage pipe composition.
The carbon fiber length is 10 mm.
The glass fiber length was 2 mm.
Comparative example 4
A method of preparing a sewer pipe composition comprising the steps of:
a. respectively putting polyacrylonitrile, polyphthalamide and polyformaldehyde into a grinding machine for grinding, grinding the polyacrylonitrile and the polyphthalamide until the particle size is 10-100nm, and grinding the polyformaldehyde until the particle size is 0.1 +/-0.1 mm.
b. Adding 35kg of polyacrylonitrile powder, 31kg of polyphthalamide powder, 100kg of polyformaldehyde particles, 9kg of ceramic powder, 2kg of tin powder, 1kg of copper powder and 8kg of nano silicon dioxide into a stirring kettle, sealing the stirring kettle, introducing nitrogen, discharging air, stirring at the rotating speed of 30r/min for 10min, and uniformly stirring to form a primary mixture.
c. And adding the primary mixture into a double-screw extruder, heating to 200 ℃, extruding to an underwater pelletizer, and pelletizing to form the sewage pipe composition.
Comparative example 5
A method of preparing a sewer pipe composition comprising the steps of:
a. respectively putting polyacrylonitrile, polyphthalamide and polyformaldehyde into a grinding machine for grinding, grinding the polyacrylonitrile and the polyphthalamide until the particle size is 10-100nm, and grinding the polyformaldehyde until the particle size is 0.1 +/-0.1 mm.
b. Adding 35kg of polyacrylonitrile powder, 31kg of polyphthalamide powder, 100kg of polyformaldehyde particles, 13kg of carbon fibers, 2kg of glass fibers, 2kg of tin powder, 1kg of copper powder and 8kg of nano silicon dioxide into a stirring kettle, sealing the stirring kettle, introducing nitrogen, discharging air, stirring at the rotating speed of 30r/min for 10min, and uniformly stirring to form a primary mixture.
c. And adding the primary mixture into a double-screw extruder, heating to 200 ℃, extruding to an underwater pelletizer, and pelletizing to form the sewage pipe composition.
The carbon fiber length is 10 mm.
The glass fiber length was 2 mm.
Experiment 1
Samples prepared using the sewage pipe compositions prepared in examples 4 to 11 and comparative examples 1 to 5 were tested for their embrittlement temperature according to GB/T5470-2008 "determination of embrittlement temperature by Plastic impact method".
Experiment 2
Part 3 of the determination of mechanical Properties of roving-reinforced resin rods for textile glass fiber-reinforced plastics according to GB/T14208.3-2009: measurement of compressive Strength the compressive strength of the samples prepared using the sewage pipe compositions prepared in examples 4 to 11 and comparative examples 1 to 5 was measured.
Experiment 3
The tensile strength of the samples prepared using the sewage pipe compositions prepared in examples 4 to 11 and comparative examples 1 to 5 was examined according to GB/T528-2009 "determination of tensile stress strain Properties of vulcanized rubber or thermoplastic rubber".
Specific detection data are shown in Table 1
TABLE 1
| Embrittlement temperature | Compressive strength | Tensile strength | |
| Example 4 | -68 | 169 | 91 |
| Example 5 | -69 | 171 | 92 |
| Example 6 | -67 | 170 | 90 |
| Example 7 | -69 | 171 | 93 |
| Example 8 | -68 | 168 | 91 |
| Example 9 | -68 | 167 | 92 |
| Example 10 | -67 | 169 | 91 |
| Example 11 | -69 | 168 | 90 |
| Comparative example 1 | -38 | 170 | 92 |
| Comparative example 2 | -39 | 169 | 93 |
| Comparative example 3 | -38 | 170 | 91 |
| Comparative example 4 | -69 | 165 | 75 |
| Comparative example 5 | -68 | 134 | 92 |
According to the table 1, the brittleness temperature of the sample prepared from the sewage pipe composition is greatly reduced by adding polyacrylonitrile and polyphthalamide into polyformaldehyde and mixing the materials in a specific ratio, so that the sewage pipe is better suitable for cold regions, and the applicability of the sewage pipe is wider.
The tensile strength of a sample prepared from the sewage pipe composition can be effectively improved by adding the carbon fiber and the glass fiber, so that the sewage pipe has better physical properties.
The compressive strength of a sample prepared from the sewage pipe composition can be effectively improved by adding the ceramic powder, so that the structural strength of the sewage pipe is better, the sewage pipe mounting hole is better supported, and the collapse of the sewage pipe mounting hole is better avoided.
Because the polyformaldehyde is used as the main matrix material, when the sewage pipe needs to be disassembled and replaced, the sewage pipe can be disassembled quickly only by heating and melting the sewage pipe, so that the steps of pulling out the sewage pipe are reduced, and the operation is more convenient.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (7)
1. A sewage pipeline construction method is characterized in that: the method comprises the following steps:
s1, excavating a construction well;
s2, installing a pipeline, which specifically comprises the following steps:
drilling by a drilling machine to form a sewage pipe mounting hole communicated with adjacent construction wells, stopping the drilling once the drilling machine advances for 1-5m, and spraying a sewage pipe mixture on the wall of the hole to form the wall of the sewage pipe;
s3, water leakage detection is carried out, and the method specifically comprises the following steps:
spraying a sewage pipe mixture at the water leakage position according to the detection result to repair the leakage;
s4, building an inspection well;
the sewage pipe mixture comprises the following components in parts by weight:
100 parts of polyformaldehyde;
30-36 parts of polyacrylonitrile;
30-36 parts of polyphthalamide.
2. The sewer pipe construction method of claim 1, further comprising: in step S2, the sewage pipe mixture is sprayed to a thickness of at least 10 mm.
3. The sewer pipe construction method of claim 1, further comprising: in step S3, the continuity of the sewage pipe wall is detected by ultrasonic detection.
4. The sewer pipe construction method of claim 1, further comprising: in the step S1, a construction well is set at a corresponding position of the inspection well in the design drawing, and in the step S4, concrete is poured into the construction well to form the inspection well.
5. The sewer pipe construction method of claim 1, further comprising: the sewage pipe mixture also comprises the following components in parts by weight:
10-15 parts of carbon fiber;
2-3 parts of glass fiber;
8-12 parts of ceramic powder.
6. The sewer pipe construction method of claim 1, further comprising: the sewage pipe mixture also comprises the following components in parts by weight:
1-2 parts of tin powder;
0.5-1 part of copper powder;
5-10 parts of nano silicon dioxide.
7. The sewer pipe construction method of claim 1, further comprising: the construction method of the sewage pipe mixture comprises the following steps:
a. grinding polyacrylonitrile and polyphthalamide to powder with particle size of 10-100 nm; grinding polyformaldehyde into particles with the particle size of 0.1-1 mm;
b. mixing polyformaldehyde particles, polyacrylonitrile powder and polyphthalamide powder to form a primary mixture;
c. and adding the primary mixture into an extrusion device, heating until the polyformaldehyde is molten, extruding and granulating to form a sewage pipeline mixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910492400.1A CN110106960B (en) | 2019-06-06 | 2019-06-06 | Sewage pipeline construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910492400.1A CN110106960B (en) | 2019-06-06 | 2019-06-06 | Sewage pipeline construction method |
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| Publication Number | Publication Date |
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| CN110106960A CN110106960A (en) | 2019-08-09 |
| CN110106960B true CN110106960B (en) | 2020-07-31 |
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| CN110105671A (en) * | 2019-06-06 | 2019-08-09 | 广东隆建工程有限公司 | House feedwater piping |
| CN110512709A (en) * | 2019-08-20 | 2019-11-29 | 广州鸿粤园林环保有限公司 | Trenchless repairing method of underground pipeline |
| CN110938348A (en) * | 2019-11-21 | 2020-03-31 | 广东中晋建设工程有限公司 | Sewage pipeline construction process |
| CN111411679A (en) * | 2020-04-22 | 2020-07-14 | 广东天濠建设工程有限公司 | Municipal drainage pipeline construction process |
| CN111535425A (en) * | 2020-05-12 | 2020-08-14 | 广东明龙建设有限公司 | Underground drainage pipe leakage repairing construction method |
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