CN113250306A - Construction method of inspection well of domestic sewage pipeline - Google Patents
Construction method of inspection well of domestic sewage pipeline Download PDFInfo
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- CN113250306A CN113250306A CN202110651451.1A CN202110651451A CN113250306A CN 113250306 A CN113250306 A CN 113250306A CN 202110651451 A CN202110651451 A CN 202110651451A CN 113250306 A CN113250306 A CN 113250306A
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/02—Manhole shafts or other inspection chambers; Snow-filling openings; accessories
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
- E02D29/121—Manhole shafts; Other inspection or access chambers; Accessories therefor characterised by the connection between shaft elements, e.g. of rings forming said shaft
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
- E02D29/125—Manhole shafts; Other inspection or access chambers; Accessories therefor characterised by the lining of the shaft
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
Abstract
The application relates to the technical field of inspection well construction, and aims to provide a construction method of a domestic sewage pipeline inspection well, which comprises the following steps: before building the well body, watering and wetting the building blocks, and building according to a preset elevation; brushing and watering the pipe head of the pipeline connected with the inspection well, and then uniformly brushing a layer of primary pulp; after the pipe head raw stock of the pipeline is fully paved in place, the pipe orifice of the pipeline is flush with the inner wall of the well, and when the pipeline penetrates through the wall of the well or the bottom of the well, an annular seam is reserved and is filled and tamped; plastering the inner and outer walls of the well body; and backfilling earthwork. The problem of current drainage inspection shaft have infiltration, quality qualification rate is low is solved. This application has the condition that reduces pipeline and wall of a well junction infiltration and pit shaft position infiltration, improves the effect of drainage inspection shaft construction quality qualification rate.
Description
Technical Field
The application relates to the technical field of inspection well construction, in particular to a construction method of a domestic sewage pipeline inspection well.
Background
The inspection well is an accessory structure which is convenient for regular inspection and is arranged for the convenience of maintenance or installation of power supply, water supply, drainage, pollution discharge, communication, cable television, gas pipes, street lamp lines and the like of urban underground infrastructure. Typically at pipe junctions, turns, pipe diameter or slope changes, and at regular intervals on straight pipe sections. Wherein, the drainage inspection shaft is an important component in municipal sewage pipe network construction engineering.
The lower the quality qualification rate of the drainage inspection well, the more water seepage of the drainage inspection well is. The drainage inspection well can soak the well foundation when seeping water, and the well body can sink unevenly as long as time passes, and cause the surrounding roadbed to sink, directly influence the discharge of sewage, even the road is intact and the safety and the comfort of driving, and the inspection well cost is higher and can cause the traffic inconvenience when maintaining. Therefore, the construction quality of the drainage inspection well plays a crucial role in the overall pollution discharge.
At present, water seepage of a drainage inspection well is a common quality common fault. Particularly, the water seepage at the joint of the pipeline and the well wall and the water seepage at the bricked shaft part are the symptoms of low quality qualification rate of the inspection well engineering.
In view of the above-mentioned related art, the inventor believes that there are defects that the existing drainage inspection well has water seepage and low quality qualification rate.
Disclosure of Invention
In order to reduce the water seepage condition of the drainage inspection well, the application provides a construction method of a domestic sewage pipeline inspection well.
The construction method for the inspection well of the domestic sewage pipeline adopts the following technical scheme:
the construction method of the inspection well of the domestic sewage pipeline comprises the following steps,
before building the well body, watering and wetting the building blocks, and building according to a preset elevation;
brushing and watering the pipe head of the pipeline connected with the inspection well, and then uniformly brushing a layer of primary pulp;
after the pipe head raw stock of the pipeline is fully paved in place, enabling the pipe orifice of the pipeline to be flush with the inner wall of the well, and reserving an annular seam and filling and tamping when the pipeline penetrates through the wall or the bottom of the well;
plastering the inner and outer walls of the well body;
and backfilling earthwork.
By adopting the technical scheme, the building blocks are watered and moistened before the well body is built, so that the bonding of the building body is ensured, the gaps are reduced, the overall sealing performance of the built well body is better, and the waterproof performance is better; the pipe head of the pipeline connected with the inspection well is brushed and watered to be clean, so that the pipeline is more firmly connected with the well wall, the sealing performance is better, and the waterproof performance is better; uniformly brushing a layer of primary pulp until the primary pulp of the pipe head is fully paved in place so as to further enhance the connection strength between the pipeline and the well wall and enhance the waterproof effect; the pipe orifice of the pipeline is flush with the inner wall of the well so as to enhance the connection tightness between the pipeline and the inner wall of the well and reduce the water seepage at the joint of the pipeline and the well wall; painting the inner and outer walls of the well body, backfilling earth, and completing construction of the inspection well; and then the construction method of the domestic sewage pipeline inspection well reduces the water seepage at the joint of the pipeline and the well wall and the water seepage at the shaft part, and improves the construction quality qualification rate of the drainage inspection well.
The present application may be further configured in a preferred example to: when the pipe orifice of the pipeline is level with the inner wall of the well, and the access pipe diameter is larger than a preset value, the pipeline is reinforced by building brick rings.
Through adopting above-mentioned technical scheme, the mouth of pipe of pipeline is level and level with the well inner wall at ordinary times, if insert the pipe diameter and be greater than the default, adopts the brick circle to build by laying bricks or stones and consolidate to further strengthen the tightness of being connected of pipeline and well inner wall, reduce the condition of pipeline and the infiltration of the wall of a well junction.
The present application may be further configured in a preferred example to: after the step of plastering the inner and outer walls of the well body and before the step of backfilling the earth,
detecting whether the strength of the mortar on the inner wall and the outer wall of the painted well body meets a preset condition or not;
and when the strength of the mortar on the inner wall and the outer wall of the well body which is painted meets the preset conditions, the inner wall and the outer wall of the well body are compacted and polished layer by layer according to the standard requirements.
Through adopting above-mentioned technical scheme, guarantee that the mortar intensity of the internal and external wall of well that whitewashes satisfies the preset condition to according to the internal and external wall of standard requirement layering compaction finishing well, make the construction quality of drainage inspection shaft better, reduced the condition of pit shaft position infiltration, and then be favorable to playing the guard action when drainage inspection shaft infiltration, improve the water resistance of inspection shaft.
The present application may be further configured in a preferred example to: before the well body is built, the original drainage ditch is dredged, a drainage groove is dug in a local road section, and surface water is led into the drainage ditch.
Through adopting above-mentioned technical scheme, drain away in introducing the escape canal with the help of the drainage groove, reduced the condition of pit shaft position infiltration to reduce the problem that the surface water infiltrates to the inspection shaft and causes the inspection shaft to soak the infiltration.
The present application may be further configured in a preferred example to: and building and intercepting the pipe well, and automatically early warning when the accumulated water in the upstream pipe well reaches the preset depth.
Through adopting above-mentioned technical scheme, build by laying bricks or stones at the tube well and cut off, play certain interception and slow down the effect that ponding flows down to ponding to automatic early warning when the tube well ponding of upstream reaches the predetermined degree of depth reminds the staff in time to carry out the pump drainage to the ponding of upper reaches tube well, and then increases the drainage ability of tube well, does benefit to the condition that reduces pit shaft position infiltration.
The present application may be further configured in a preferred example to: and arranging a drainage well outside the preset distance value of the inspection well foundation at the local section of which the groundwater seepage flow exceeds the preset maximum value, and performing pumping drainage on the drainage well periodically while building a well body.
By adopting the technical scheme, the drainage wells are arranged on the local road sections with the underground water seepage quantity exceeding the preset maximum value, underground water is intercepted, and drainage is performed on the drainage wells periodically while the well body is built, so that the problem that the underground water seeps into the inspection wells to cause the soaking and seepage of the inspection wells is reduced, and the condition of water seepage of shaft parts is reduced.
The present application may be further configured in a preferred example to: the width of the reserved circular seam is within the range of [30mm, 50mm ].
By adopting the technical scheme, the width of the circular seam is within the range of [30mm, 50mm ], so that the connection strength is enhanced while the stable connection of the pipeline passing through the wall or the bottom of the well is ensured, the connection between the pipeline and the well body is tighter, and the water seepage at the joint of the pipeline and the well wall and the water seepage at the shaft position are reduced.
The present application may be further configured in a preferred example to: the step of reserving the annular seam and filling and tamping comprises filling and tamping by using oil ramie-cement mortar.
By adopting the technical scheme, the grease-cement mortar forms a compact protective layer at the connecting position of the pipeline and the well wall, so that the oxidative corrosion of the pipeline is prevented, and the connecting strength of the pipeline when the pipeline passes through the wall or the bottom of the well is enhanced, so that the pipeline and the well body are connected more tightly.
The present application may be further configured in a preferred example to: when the access pipe diameter is larger than 300mm, the brick ring is used for building and reinforcing.
Through adopting above-mentioned technical scheme, the mouth of pipe of pipeline is leveled at ordinary times with the wall in the well, if insert the pipe diameter and be greater than 300mm, adopts the brick circle to build by laying bricks or stones and consolidate to further strengthen the tightness of being connected of pipeline and well inner wall, reduce the condition of pipeline and the wall of a well junction infiltration.
The present application may be further configured in a preferred example to: and arranging a drainage well outside 20cm of the inspection well foundation at the local section of which the groundwater seepage quantity exceeds the preset maximum value.
By adopting the technical scheme, the drainage well is arranged at the position which is more than 20cm away from the inspection well foundation of the local road section with the underground water seepage quantity exceeding the preset maximum value, so that the underground water is intercepted, the problem that the inspection well is soaked and seeped due to the fact that the underground water seeps into the inspection well is reduced, and the condition of water seepage of a shaft part is reduced.
In summary, the present application includes at least one of the following beneficial technical effects:
1. before building the well body, watering and wetting the building blocks, and building according to a preset elevation; brushing and watering the pipe head of the pipeline connected with the inspection well, and uniformly brushing and smearing a layer of primary pulp until the primary pulp of the pipe head is fully paved in place; making the pipe orifice of the pipeline flush with the inner wall of the well, and reserving an annular seam and filling and tamping when the pipeline passes through the wall or the bottom of the well; painting the inner and outer walls of the well body, backfilling earth, and completing construction of the inspection well; the construction method of the domestic sewage pipeline inspection well further reduces the water seepage at the joint of the pipeline and the well wall and the water seepage at the shaft part, and improves the construction quality qualification rate of the drainage inspection well;
2. when the pipe orifice of the pipeline is level with the inner wall of the well, if the connected pipe diameter is larger than a preset value, the pipeline is reinforced by brick ring masonry, so that the connection tightness between the pipeline and the inner wall of the well is further enhanced, and the condition of water seepage at the connection part of the pipeline and the well wall is reduced;
3. the mortar strength of the inner wall and the outer wall of the well body which is painted meets the preset conditions, and the inner wall and the outer wall of the well body are compacted and polished layer by layer according to the standard requirements, so that the protection effect is realized when the water seepage of the drainage inspection well occurs, and the water resistance of the inspection well is improved;
4. surface water is led into the drainage ditch by virtue of the drainage groove to be drained, so that the condition of water seepage at a shaft part is reduced;
5. the method has the advantages that the pipe well is built for interception, automatic early warning is carried out when the accumulated water of the upstream pipe well reaches the preset depth, workers are reminded to pump and drain the accumulated water of the upstream pipe well in time, the drainage capacity of the pipe well is improved, and the condition of water seepage of a shaft part is reduced;
6. and arranging a drainage well at a local section where the groundwater seepage flow exceeds a preset maximum value, intercepting the groundwater, and building a well body and meanwhile, periodically pumping and draining the drainage well, so that the condition of water seepage at a shaft part is reduced.
Drawings
Fig. 1 is a schematic flow chart of a method for constructing a manhole of a sanitary sewer according to an embodiment of the present disclosure.
FIG. 2 is a schematic flow chart of drainage measures in the construction of an inspection well.
Detailed Description
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship, unless otherwise specified.
The embodiment of the application provides a domestic sewage pipeline inspection well construction method, and the main steps of the method are described as follows.
Before building the well body, watering and wetting the building blocks, and building according to a preset elevation;
brushing and watering the pipe head of the pipeline connected with the inspection well, and then uniformly brushing a layer of primary pulp;
after the pipe head raw stock of the pipeline is fully paved in place, the pipe orifice of the pipeline is flush with the inner wall of the well, and when the pipeline penetrates through the wall of the well or the bottom of the well, an annular seam is reserved and is filled and tamped;
plastering the inner and outer walls of the well body;
and backfilling earthwork.
The embodiments of the present application will be described in further detail with reference to the drawings attached hereto.
Referring to fig. 1, the steps of the sanitary sewer manhole construction method are described as follows.
Firstly, a quality management system is perfected, a technology background system is seriously implemented, and detailed technology background is carried out on the whole staff. Specifically, study on the existing quality acceptance specifications such as CJJ1-2008 and GB50268-2008, all the engineers are organized to hold a comprehensive and detailed quality and technology delivery meeting, delivery of delivery contents to the hands of each worker in a written form, and guidance of worker construction is provided on site, so that the workers can perform construction operation strictly according to the quality and technology delivery contents, and the improvement of the quality level of the construction of the inspection well of the domestic sewage pipeline is facilitated.
According to the accuracy requirement of engineering design, an instrument meeting the control accuracy requirement is equipped to carry out on-site survey, all measurement points need to have complete record of the connecting pile, and related connecting personnel, connecting date and related detailed information need to be marked. The specific technical scheme of the inspection well construction is formulated according to various plane and elevation control point data submitted by owners or related units by understanding design drawings and documents and combining corresponding technical specifications and standards, so as to carry out masonry according to the technical scheme.
S1: before the well body is built, the building blocks are watered and moistened, and the building is carried out according to the preset elevation. Wherein, the building block is watered and moistened one day before the building, the four sides of the building block are soaked by water for 1.4-1.6cm, and the water content of the building block is 10-15%. In this example, water was allowed to soak into 1.5cm of the four sides of the block to bring the water content of the block to 12%.
During building, firstly measuring and lofting, then pouring a concrete well foundation, and building a well wall after the strength reaches 2.5 Mpa. The well wall is built by adopting an artificial suspension wire, and the verticality of the well wall is controlled. When in masonry, mortar joints are smooth, mortar is full, and the well wall is smooth and straight. And building the building blocks into the inspection well wall directly according to the design requirements. The ladder stand in the well is firmly embedded and has accurate position. The prefabricated reinforced concrete cover plate is smooth and clean without honeycomb pitted surface, the installation ensures that the base mortar is stable and the position is accurate, and triangular ash is plastered at the corners according to requirements. The base slurry should also be stable when the cover base is installed. And checking and accepting the on-site masonry quality regularly, finding problems in time and performing rectification and improvement strictly according to the technical bottom-crossing standard.
S2: and when the well body is built to the elevation of the pipe bottom, height retest is carried out so that the built well body meets the requirements of checking, cleaning and dredging the domestic sewage pipeline.
S3: and when the well body is built until the elevation of the bottom of the pipe meets the requirement, stopping building.
S4: and (4) chiseling and brushing, watering and wetting the pipe head of the pipeline connected with the inspection well, and then uniformly brushing a layer of primary pulp.
S5: and connecting the pipeline with the well body until the pipe head raw stock of the pipeline is fully paved in place. The pipeline is directly cast and connected with the inspection well by building blocks. In the embodiment, an intermediate layer method can be adopted, the intermediate layer is made of plastic adhesive and coarse sand which are the same as the pipe material of the pipeline in advance at the connecting part of the pipeline and the inspection well, and then cement mortar is used for building the intermediate layer into the well wall of the inspection well. The pipe orifice of the pipeline is flush with the inner wall of the well, and when the access pipe diameter is larger than a preset value, the pipeline is reinforced by building a brick ring. When the pipeline passes through the wall of the well or the bottom of the well, an annular seam is reserved and tamping is carried out. The width of the reserved circular seam is within the range of [30, 50] mm.
Optionally, the preset pipe diameter value may be 300mm, and the seam width of the circular seam may be 40 mm. And filling and tamping the reserved circular seam by using oil ramie-cement mortar.
S6: and (4) plastering the inner wall and the outer wall of the well body. The inner and outer walls used l: 2.5 plastering cement mortar with the thickness of 20mm, wherein the plastering surface is smooth and calendered without phenomena of hollowing, cracking and the like.
S7: detecting whether the mortar strength of the inner wall and the outer wall of the painted well body meets preset conditions or not, and detecting that the mortar strength preset value of the inner wall and the outer wall of the well is 7.5 Mpa; and when the strength of the mortar on the inner wall and the outer wall of the well body which is painted meets the preset conditions, the inner wall and the outer wall of the well body are compacted and polished layer by layer according to the standard requirements.
S8: backfilling earthwork, and tamping by adopting a mechanical tool in layers, wherein the backfilling thickness of each layer is about 250-300mm, and the compacted backfilled earthwork is tightly attached to the well wall. After the construction of the inspection well is finished, quality inspection should be carried out with relevant departments, and the dimensional accuracy of the inspection well meets the requirements of quality inspection and evaluation standards. And checking and accepting the on-site masonry quality regularly, finding problems in time and carrying out rectification and improvement strictly according to enterprise standards.
Referring to fig. 2, the steps of setting drainage measures before the manhole construction are described as follows.
S10: before the well body is built, the original drainage ditch is dredged, the drainage groove is dug in a local road section, surface water is introduced into the drainage ditch to orderly and reasonably discharge the surface water, so that the surface water cannot flow into a construction section groove of the well body, and the condition that the inspection well is soaked by water is reduced.
S11: and building and intercepting the pipe well, and automatically early warning when the accumulated water in the upstream pipe well reaches the preset depth. Specifically, through installing level sensor in the tube well upstream, level sensor's output electric connection has bee calling organ and is connected with backstage communication. Liquid level sensor monitors the liquid level condition in the pipe shaft in real time and makes level sensor output trigger signal when the water level reaches the preset degree of depth, triggers bee calling organ and carries out the buzzing early warning and shows the position that the liquid level surpassed the pipe shaft of the upper reaches of preset degree of depth on the backstage, is favorable to professional electrician cooperation earthwork team personnel to carry out the pump drainage to upstream pipe shaft ponding.
S12: and arranging a drainage well outside the preset distance value of the inspection well foundation at the local section of which the groundwater seepage flow exceeds the preset maximum value, and performing pumping drainage on the drainage well periodically while building a well body. Optionally, a drainage well is arranged 20cm beyond the base of the inspection well.
By organizing and implementing ordered drainage measures, accumulated water does not exist at the bottoms of most construction road sections and in the pipe wells in the road sections for pipe well construction and groove excavation operation, and the requirement of inspection well construction operation can be met by the accumulated water existing in individual positions, so that the condition that the inspection well is soaked by water is reduced.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
In the embodiment, the method is applied to the construction work of the sewage pipe inspection well of rural domestic sewage treatment leakage-checking and vacancy-filling engineering in Yongning street white water village in the city of Guangzhou, about 200 inspection wells are constructed by adopting a domestic sewage pipe inspection well construction method, after masonry engineering is completed, the construction quality of the sewage pipe inspection well is checked, 19 inspection wells are checked, the number of unqualified points is only 1, the qualification rate is 94.7%, the qualification rate is improved by 13.2% compared with the qualification rate of the sewage pipe inspection well engineering before activation which is generally 81.5%, and the construction quality qualification rate of the inspection well engineering reaches the level higher than the excellent quality.
The beneficial effects of this embodiment are as follows:
1. before building a well body, watering and wetting building blocks and chiseling brushes, watering and wetting a pipe head of a pipeline connected with an inspection well, uniformly brushing a layer of primary pulp until the primary pulp of the pipe head is fully paved in place, enabling a pipe orifice of the pipeline to be flush with the inner wall of the well, and reserving a circular seam and filling and tamping when the pipeline penetrates through the wall of the well or the bottom of the well so as to enhance the connection tightness between the pipeline and the inner wall of the well, reduce the water seepage situation at the joint of the pipeline and the wall of the well, enable the connection between the pipeline and the well body to be tighter, and be beneficial to reducing the water seepage situation at the joint of the pipeline and the wall of the well and the water seepage situation at the position of a shaft; the construction method of the domestic sewage pipeline inspection well further reduces the water seepage at the joint of the pipeline and the well wall and the water seepage at the shaft part, and improves the construction quality qualification rate of the drainage inspection well;
2. when the pipe diameter of the pipeline is larger than a preset value, brick ring masonry is adopted for reinforcement so as to further enhance the connection tightness of the pipeline and the inner wall of the well;
3. the mortar strength of the inner wall and the outer wall of the well body which are painted meets the preset conditions, and the inner wall and the outer wall of the well body are compacted and polished in a layered mode according to the standard requirements, so that the construction quality of the drainage inspection well is better, the protection effect is favorably realized when the drainage inspection well is seeped, and the water resistance of the inspection well is improved;
4. surface water is led into the drainage ditch through the drainage groove to be drained away, so that the problem that the surface water seeps into the inspection well to cause the water seepage of the part of the inspection well soaking the shaft is solved;
5. building and intercepting the pipe well, playing a certain role in intercepting accumulated water and slowing down the downward flow of the accumulated water, automatically giving an early warning when the accumulated water in the upstream pipe well reaches a preset depth, reminding workers to pump and drain the accumulated water in the upstream pipe well in time, so as to increase the drainage capacity of the pipe well and reduce the water seepage condition of a shaft part;
6. by arranging the drainage well, underground water is intercepted, and the drainage well is pumped and drained periodically while a well body is built, so that the problem that the underground water seeps into the inspection well to cause soaking and water seepage of the inspection well is solved, and the condition of water seepage of a shaft part is reduced;
7. the width of the circular seam is within the range of [30mm, 50mm ], which is beneficial to ensuring the stable connection of the pipeline when passing through the wall or the bottom of the well and simultaneously enhancing the connection strength, so that the pipeline is more tightly connected with the well body;
8. the oil hemp-cement mortar forms a compact protective layer at the connecting position of the pipeline and the well wall, so that the connecting strength of the pipeline when the pipeline passes through the wall or the bottom of the well is enhanced while the pipeline is prevented from being oxidized and corroded, and the pipeline and the well body are connected more tightly.
Claims (10)
1. The construction method of the inspection well of the domestic sewage pipeline is characterized by comprising the following steps,
before building the well body, watering and wetting the building blocks, and building according to a preset elevation;
brushing and watering the pipe head of the pipeline connected with the inspection well, and then uniformly brushing a layer of primary pulp;
after the pipe head raw stock of the pipeline is fully paved in place, enabling the pipe orifice of the pipeline to be flush with the inner wall of the well, and reserving an annular seam and filling and tamping when the pipeline penetrates through the wall or the bottom of the well;
plastering the inner and outer walls of the well body;
and backfilling earthwork.
2. The method of claim 1, wherein the pipe orifice of the pipe is flush with the inner wall of the well, and when the pipe diameter of the pipe is greater than a predetermined value, the pipe orifice is reinforced by ring masonry.
3. The sanitary sewer manhole cover construction method according to claim 1, wherein, after the step of plastering the inner and outer walls of the manhole body and before the step of backfilling earthwork,
detecting whether the strength of the mortar on the inner wall and the outer wall of the painted well body meets a preset condition or not;
and when the strength of the mortar on the inner wall and the outer wall of the well body which is painted meets the preset conditions, the inner wall and the outer wall of the well body are compacted and polished layer by layer according to the standard requirements.
4. The method of claim 1, wherein prior to constructing the manhole, the drainage ditch is dredged, and drainage grooves are dug in the local section to guide surface water into the drainage ditch.
5. The method of claim 4, wherein the pipe well is constructed to intercept water and the warning is automatically issued when the accumulated water in the upstream pipe well reaches a predetermined depth.
6. The method of claim 5, wherein the drainage wells are arranged at a local section where the groundwater seepage amount exceeds a preset maximum value, and are periodically drained while building the well body, except for a preset distance value of the foundation of the manhole.
7. The method of claim 1, wherein the width of the circumferential seam is within the range of [30mm, 50mm ].
8. The method of claim 1, wherein the step of reserving the circumferential seam and tamping the packer comprises tamping the packer with hemp cement mortar.
9. The method of claim 2, wherein the access pipe diameter is greater than 300mm, and the reinforcement is performed by ring masonry.
10. The method of claim 6, wherein a drainage well is disposed at a location 20cm away from the manhole base at a local section where the amount of groundwater seepage exceeds a predetermined maximum value.
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2021
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