CN109183802A - A kind of construction method for protecting municipal pipeline - Google Patents
A kind of construction method for protecting municipal pipeline Download PDFInfo
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- CN109183802A CN109183802A CN201811175341.7A CN201811175341A CN109183802A CN 109183802 A CN109183802 A CN 109183802A CN 201811175341 A CN201811175341 A CN 201811175341A CN 109183802 A CN109183802 A CN 109183802A
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- municipal pipeline
- municipal
- soil
- pipeline
- gutter
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Sewage (AREA)
Abstract
The invention discloses a kind of construction methods for protecting municipal pipeline, it include: S1, it determines the position of municipal pipeline: being docked by being laid with department from different municipal pipelines, directly obtain paving location and the direction of related municipal pipeline, and the Position Approximate of municipal pipeline historically, hand digging is carried out to municipal pipeline respectively in the boundary lines of roads two sides of planning, after the boundary lines of roads two sides in planning pass through hand digging to same root correlation municipal pipeline, the present invention is by positioning municipal pipeline, on municipal pipeline top, watering infiltrates soil, gutter is opened up respectively in municipal pipeline two sides again, finally the soil around municipal pipeline is rinsed using giant, relative to traditional mode by mechanically or manually excavating, this method will not injure municipal pipeline, municipal pipeline can be carried out It adequately protects, and this method excavation efficiency is higher, will not influence the duration.
Description
Technical field
The present invention relates to technical field of municipal construction, specially a kind of construction method for protecting municipal pipeline.
Background technique
Municipal Infrastructure is the important guarantee for building city material progress and cultural and ideological progress.Municipal basis is set
Apply be urban development basis, be constantly ensure urban sustainable development a critical facility.It mainly by traffic,
Water supply, draining, combustion gas, environmental sanitation, power supply, communicate, take precautions against natural calamities, every engineering system such as afforestation is constituted；
As urban pipe network is increasingly taken seriously, the talent for having systematic Urban Buried Pipeline Network knowledge is had increasing need for, it can
Have the composition, cloth to the urban pipelines system such as city water, draining, combustion gas, heat supply, power supply, communication, to each pipeline system
It sets, the ability that main units, tubing etc. are understood in detail.
But there are some drawbacks in the construction process in traditional municipal pipeline, such as:
Traditional town road first has to carry out positioning exploration to the municipal pipeline inside boundary lines of roads when being constructed, right
It is also excavated in the municipal pipeline for influencing construction, it is exposed, avoided in construction due to digging machine accidentally touching damage
Municipal pipeline, and traditional mode by manually being excavated to municipal pipeline seriously affects construction speed due to inefficiency,
And spade is also easily damaged municipal pipeline when hand excavation.
Summary of the invention
The purpose of the present invention is to provide a kind of construction methods for protecting municipal pipeline, to solve to mention in above-mentioned background technique
Out the problem of.
To achieve the above object, the invention provides the following technical scheme: a kind of construction method for protecting municipal pipeline, packet
It includes:
S1, the position for determining municipal pipeline:
It is docked by being laid with department from different municipal pipelines, directly obtains paving location and the side of related municipal pipeline
To, and the Position Approximate of municipal pipeline historically, people is carried out to municipal pipeline respectively in the boundary lines of roads two sides of planning
Work is excavated, and after the boundary lines of roads two sides in planning pass through hand digging to same root correlation municipal pipeline, utilizes pulverized limestone
The connecting line of boundary lines of roads two sides municipal pipeline is drawn on the ground, and the connecting line drawn on ground is related municipal administration pipe
The specific trend of line；
S2, control surface layer soil thickness:
When in S1 step after both sides of the road are excavated to same root municipal pipeline, at the top of tape measure correlation municipal pipeline
Soil thickness, if the soil thickness at the top of the municipal pipeline of boundary lines of roads two sides more than 50cm, and in municipal administration inside boundary lines of roads
When walking upwards without at significant depressions of pipeline, select road-mixed machine to move towards to carry out pavement breaking along municipal pipeline, due to road mix
The grinding depth of machine hereinafter, municipal pipeline therefore will not be damaged using road-mixed machine, carries out brokenly in 30cm in road-mixed machine road pavement
After broken, select bull-dozer by surface layer be crushed soil block clear up, cleaning after the completion of again using pulverized limestone on the ground along
Municipal pipeline trend draws connecting line；If the soil thickness at the top of the municipal pipeline of boundary lines of roads two sides has side lower than 50cm,
Then crushing and clearing is not carried out to ground；
S3, infiltration soil:
Lower than 50cm or after crushing and clearing at the top of municipal pipeline, soil thickness is lower than soil thickness at the top of municipal pipeline
It when 50cm, is watered using sprinkling truck along municipal pipeline, so that the soil layer around municipal pipeline is fully wet out；
S4, rhone is excavated:
Gutter, the gutter excavation width are excavated respectively at the 30cm-50cm of municipal pipeline two sides using mini-excavator
For 50cm-80cm, the gutter cutting depth is greater than the municipal pipeline depth of burying, and in the gutter close to rain-water drainage
The catch basin of 50cm × 50cm is excavated out in pipe one end, and the catch basin elevation of bottom is 50cm lower than gutter elevation of bottom；
S5, soil rinse；
River water is filled respectively using at least two sprinkling trucks simultaneously, and connects rinse water pipe in sprinkling truck water outlet, using spilling
Water alternate scour municipal pipeline inside waterwheel is conducive to improve work effect so that washing away for soil can be carried out uninterruptedly
Rate, since municipal pipeline top soil thickness is smaller, and the soil around municipal pipeline is more loose after infiltration, is sprinkling water
Under the washing away of vehicle, the soil around municipal pipeline can be detached from from pipeline easily, in order to not injure municipal pipeline
In the case of the soil around municipal pipeline is cleared up.
Further, further includes: in the S1, after excavating municipal pipeline in the boundary lines of roads two sides of planning,
The same root municipal pipeline that two sides are excavated is connected with tape measure first with construction, and tape measure is straightened, then utilizes lime
Powder draws lines along tape measure.
Further, further includes: the walking upwards there are recess in municipal pipeline inside the boundary lines of roads of planning, then it is sharp
The innermost absolute altitude of recess is detected with level, and by calculating to obtain distance at surface indentation apart from municipal pipeline, works as table
Height of the face recess apart from municipal pipeline is less than 50cm, then road-mixed machine road pavement can not be used to be crushed, when surface is recessed
It falls into height of the place apart from municipal pipeline and is greater than 50cm, then road-mixed machine road pavement can be used and be crushed.
Further, further includes: when soil layer carries out pouring water infiltration at the top of to municipal pipeline in the S3, divide 3 times -5 times
It waters, and watering is required to concentrate the connecting line at the top of road piping to be poured every time.
Further, further includes: the catch basin draws water to gutter inside for placing immersible pump, due to 50cm
The catch basin of × 50cm can just place immersible pump, and after rinse water flows to the catch basin, and internal soil is
It is deposited to gutter bottom completely.
Further, further includes: when the distance between municipal pipeline and sewage pipe inspection-pit be significantly less than municipal pipeline with
The distance between rain pipe water inlet then selects to excavate catch basin close to sewage pipe inspection-pit side.
Further, further includes: the setting of gutter inclined bottom surface, the gutter bottom surface is set according to the gradient 10 ‰
It sets, and the catch basin is in lowest point.
Further, further includes: the sprinkling truck water outlet is equipped with high-pressure hydraulic pump, and the rinse water pipe is installed
In high-pressure hydraulic pump water outlet, the hydraulic pressure that the rinse water pipe sprays is between 1Mpa-3Mpa.
Compared with prior art, the beneficial effects of the present invention are:
By positioning to municipal pipeline, on municipal pipeline top, watering infiltrates soil, then in municipal pipeline two sides
Gutter is opened up respectively, finally the soil around municipal pipeline is rinsed using giant, relative to traditional by machine
The mode of tool or hand excavation, this method will not injure municipal pipeline, can adequately protect to municipal pipeline, and we
Method excavation efficiency is higher, will not influence the duration.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
The present invention provides a kind of technical solution: a kind of construction method for protecting municipal pipeline, comprising:
S1, the position for determining municipal pipeline:
It is docked by being laid with department from different municipal pipelines, obtains design drawing from relevant departments first, or related
Department discharge professional detects, so as to directly obtain paving location and the direction of related municipal pipeline, and according to
The Position Approximate of the municipal pipeline of record carries out hand digging to municipal pipeline respectively in the boundary lines of roads two sides of planning, is
The municipal pipeline inside boundary lines of roads is exposed all, needs to send out municipal pipeline outside boundary lines of roads
It now excavates, then from boundary lines of roads two sides tap point to road inner excavated, so that the excavation to municipal pipeline is more smoothly accurate,
After the boundary lines of roads two sides in planning pass through hand digging to same root correlation municipal pipeline, on the ground using pulverized limestone
The connecting line of boundary lines of roads two sides municipal pipeline is drawn, the connecting line drawn on ground is the specific of related municipal pipeline
Trend facilitates staff the later period can be facilitated to manage municipal administration in the more intuitive trend for seeing municipal pipeline in soil layer surface
Line is handled；
S2, control surface layer soil thickness:
When in S1 step after both sides of the road are excavated to same root municipal pipeline, at the top of tape measure correlation municipal pipeline
Soil thickness selects level to measure, reading of the Sopwith staff on municipal pipeline is subtracted when measuring to soil thickness
Removing Sopwith staff in the reading of soil layer upper surface is soil thickness, if the soil thickness at the top of the municipal pipeline of boundary lines of roads two sides is super
50cm is crossed, and when walking upwards without at significant depressions, road-mixed machine is selected to manage along municipal administration in municipal pipeline inside boundary lines of roads
Line move towards carry out pavement breaking, due to road-mixed machine grinding depth in 30cm hereinafter, therefore city will not be damaged using road-mixed machine
Political affairs pipeline selects bull-dozer to clear up the soil block that surface layer is crushed, after the completion of cleaning after road-mixed machine road pavement be crushed
Connecting line is drawn along municipal pipeline trend on the ground using pulverized limestone again；If at the top of the municipal pipeline of boundary lines of roads two sides
When soil thickness has side lower than 50cm, then crushing and clearing is not carried out to ground, utilizes lime pastel when directly using step S1
Connecting line out positions municipal pipeline；
S3, infiltration soil:
Lower than 50cm or after crushing and clearing at the top of municipal pipeline, soil thickness is lower than soil thickness at the top of municipal pipeline
When 50cm, since the soil thickness at the top of at this time municipal pipeline is less than 50cm, moisture when carrying out pouring water infiltration
It is more easier around infiltration to municipal pipeline, so that it is more convenient quick when being rinsed to municipal pipeline, it is then sharp
It is watered with sprinkling truck along municipal pipeline, so that the soil layer around municipal pipeline is fully wet out, after infiltration
There are more moisture between soil, so that the bonding force between soil reduces, it is more convenient to be washed away using high pressure water, make
The soil obtained on municipal pipeline is easier to be washed；
S4, rhone is excavated:
Gutter is excavated respectively at the 30cm-50cm of municipal pipeline two sides using mini-excavator, due to the municipal administration pipe when excavating
Soil around line is infiltrated, and the soil when excavating gutter around municipal pipeline will appear the case where automatically stripping,
Therefore the soil removed from municipal pipeline is also required to clear up using digging machine, more convenient later period to municipal pipeline into
Horizontal high voltage hydraulic giant rinses, and the gutter excavation width is 50cm-80cm, and broader gutter can store municipal pipeline stripping
From the soil to get off, it is unlikely to make soil clogging gutter, the gutter cutting depth is greater than the municipal pipeline depth of burying, makes
Municipal pipeline can be integrally exposed when must wash away, and excavate out 50cm close to rainwater drainage pipe one end in the gutter
The catch basin of × 50cm, the catch basin elevation of bottom is 50cm lower than gutter elevation of bottom, facilitates and places immersible pump extraction punching
Brush uses water；
S5, soil rinse；
River water is filled respectively using at least two sprinkling trucks simultaneously, and connects rinse water pipe in sprinkling truck water outlet, using spilling
Water alternate scour municipal pipeline inside waterwheel is conducive to improve work effect so that washing away for soil can be carried out uninterruptedly
Rate, since municipal pipeline top soil thickness is smaller, and the soil around municipal pipeline is more loose after infiltration, is sprinkling water
Under the washing away of vehicle, the soil around municipal pipeline can be detached from from pipeline easily, in order to not injure municipal pipeline
In the case of the soil around municipal pipeline is cleared up.
Further, further includes: in the S1, after excavating municipal pipeline in the boundary lines of roads two sides of planning,
The same root municipal pipeline that two sides are excavated is connected with tape measure first with construction, and tape measure is straightened, then utilizes lime
Powder draws lines along tape measure, due to the trend using tape measure calibration municipal pipeline, so that the connecting line drawn using pulverized limestone
More straight, the pulverized limestone connecting line than not using tape measure calibration to draw is more accurate.
Further, further includes: the walking upwards there are recess in municipal pipeline inside the boundary lines of roads of planning, then it is sharp
The innermost absolute altitude of recess is detected with level, and by calculating to obtain distance at surface indentation apart from municipal pipeline, works as table
Height of the face recess apart from municipal pipeline is less than 50cm, then road-mixed machine road pavement can not be used to be crushed, when surface is recessed
Fall into height of the place apart from municipal pipeline be greater than 50cm, then road-mixed machine road pavement can be used and be crushed, can effectively avoid by
Cause municipal pipeline topsoil thickness bottom small in surface indentation, road-mixed machine is avoided to damage municipal pipe when being crushed to soil layer
Line.
Further, further includes: when soil layer carries out pouring water infiltration at the top of to municipal pipeline in the S3, divide 3 times -5 times
It waters, and watering is required to concentrate the connecting line at the top of road piping to be poured every time, repeatedly pouring water infiltration can
Guarantee that poured infiltration water will not be excessively to external diffusion, what can more be concentrated infiltrates the soil around municipal pipeline
Work.
Further, further includes: the catch basin draws water to gutter inside for placing immersible pump, due to 50cm
The catch basin of × 50cm can just place immersible pump, and after rinse water flows to the catch basin, and internal soil is
It is deposited to gutter bottom completely, since soil particle quality is larger convenient for sedimentation, effectively soil particle can be avoided to enter
To inside immersible pump, blocking immersible pump is avoided.
Further, further includes: when the distance between municipal pipeline and sewage pipe inspection-pit be significantly less than municipal pipeline with
The distance between rain pipe water inlet then selects to excavate catch basin close to sewage pipe inspection-pit side, selects closer drainpipe
Road opens up catch basin, can reduce the dosage of drinking-water pipe, keeps flushing water conveying distance shorter, increases efficiency of drawing water.
Further, further includes: the setting of gutter inclined bottom surface, the gutter bottom surface is set according to the gradient 10 ‰
It sets, and the catch basin is in lowest point, facilitates rinse water that can flow to catch basin through gutter and be discharged, will not arranged
Ponding is generated inside ditch.
Further, further includes: the sprinkling truck water outlet is equipped with high-pressure hydraulic pump, and the rinse water pipe is installed
In high-pressure hydraulic pump water outlet, the hydraulic pressure that the rinse water pipe sprays can adjust between 1Mpa-3Mpa according to different soil properties
Washing pressure, guarantee can wash away different soil properties.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (8)
1. a kind of construction method for protecting municipal pipeline characterized by comprising
S1, the position for determining municipal pipeline:
It is docked by being laid with department from different municipal pipelines, directly obtains paving location and the side of related municipal pipeline
To, and the Position Approximate of municipal pipeline historically, people is carried out to municipal pipeline respectively in the boundary lines of roads two sides of planning
Work is excavated, and after the boundary lines of roads two sides in planning pass through hand digging to same root correlation municipal pipeline, utilizes pulverized limestone
The connecting line of boundary lines of roads two sides municipal pipeline is drawn on the ground, and the connecting line drawn on ground is related municipal administration pipe
The specific trend of line；
S2, control surface layer soil thickness:
When in S1 step after both sides of the road are excavated to same root municipal pipeline, at the top of tape measure correlation municipal pipeline
Soil thickness, if the soil thickness at the top of the municipal pipeline of boundary lines of roads two sides more than 50cm, and in municipal administration inside boundary lines of roads
When walking upwards without at significant depressions of pipeline, select road-mixed machine to move towards to carry out pavement breaking along municipal pipeline, due to road mix
The grinding depth of machine hereinafter, municipal pipeline therefore will not be damaged using road-mixed machine, carries out brokenly in 30cm in road-mixed machine road pavement
After broken, select bull-dozer by surface layer be crushed soil block clear up, cleaning after the completion of again using pulverized limestone on the ground along
Municipal pipeline trend draws connecting line；If the soil thickness at the top of the municipal pipeline of boundary lines of roads two sides has side lower than 50cm,
Then crushing and clearing is not carried out to ground；
S3, infiltration soil:
Lower than 50cm or after crushing and clearing at the top of municipal pipeline, soil thickness is lower than soil thickness at the top of municipal pipeline
It when 50cm, is watered using sprinkling truck along municipal pipeline, so that the soil layer around municipal pipeline is fully wet out；
S4, rhone is excavated:
Gutter, the gutter excavation width are excavated respectively at the 30cm-50cm of municipal pipeline two sides using mini-excavator
For 50cm-80cm, the gutter cutting depth is greater than the municipal pipeline depth of burying, and in the gutter close to rain-water drainage
The catch basin of 50cm × 50cm is excavated out in pipe one end, and the catch basin elevation of bottom is 50cm lower than gutter elevation of bottom；
S5, soil rinse；
River water is filled respectively using at least two sprinkling trucks simultaneously, and connects rinse water pipe in sprinkling truck water outlet, using spilling
Water alternate scour municipal pipeline inside waterwheel is conducive to improve work effect so that washing away for soil can be carried out uninterruptedly
Rate, since municipal pipeline top soil thickness is smaller, and the soil around municipal pipeline is more loose after infiltration, is sprinkling water
Under the washing away of vehicle, the soil around municipal pipeline can be detached from from pipeline easily, in order to not injure municipal pipeline
In the case of the soil around municipal pipeline is cleared up.
2. a kind of construction method for protecting municipal pipeline according to claim 1, which is characterized in that further include:
In the S1, after excavating municipal pipeline in the boundary lines of roads two sides of planning, connect first with construction tape measure
The same root municipal pipeline excavated two sides is connect, and tape measure is straightened, is then drawn lines using pulverized limestone along tape measure.
3. a kind of construction method for protecting municipal pipeline according to claim 1, which is characterized in that further include:
Inside the boundary lines of roads of planning municipal pipeline walk upwards there are recess, then using level detection recess most
The absolute altitude of depths, and by calculating to obtain distance at surface indentation apart from municipal pipeline, apart from municipal pipeline at surface indentation
Height be less than 50cm, then can not use road-mixed machine road pavement be crushed, apart from the height of municipal pipeline at surface indentation
Degree is greater than 50cm, then road-mixed machine road pavement can be used and be crushed.
4. a kind of construction method for protecting municipal pipeline according to claim 1, which is characterized in that further include:
When soil layer carries out pouring water infiltration at the top of to municipal pipeline in the S3, divide 3 times -5 times and water, and watering is equal every time
Need to concentrate the connecting line at the top of road piping to be poured.
5. a kind of construction method for protecting municipal pipeline according to claim 1, which is characterized in that further include:
The catch basin draws water to gutter inside for placing immersible pump, since the catch basin of 50cm × 50cm just can
Immersible pump is enough placed, and after rinse water flows to the catch basin, internal soil is deposited to gutter bottom completely
Portion.
6. a kind of construction method for protecting municipal pipeline according to claim 1, which is characterized in that further include:
When the distance between municipal pipeline and sewage pipe inspection-pit be significantly less than between municipal pipeline and rain pipe water inlet away from
From then selection excavates catch basin close to sewage pipe inspection-pit side.
7. a kind of construction method for protecting municipal pipeline according to claim 1, which is characterized in that further include:
The setting of gutter inclined bottom surface, the gutter bottom surface are configured according to the gradient 10 ‰, and the catch basin is in most
Lower.
8. a kind of construction method for protecting municipal pipeline according to claim 1, which is characterized in that further include:
The sprinkling truck water outlet is equipped with high-pressure hydraulic pump, and the rinse water pipe is mounted on high-pressure hydraulic pump water outlet, institute
The hydraulic pressure of rinse water pipe ejection is stated between 1Mpa-3Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811175341.7A CN109183802A (en) | 2018-10-10 | 2018-10-10 | A kind of construction method for protecting municipal pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811175341.7A CN109183802A (en) | 2018-10-10 | 2018-10-10 | A kind of construction method for protecting municipal pipeline |
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| Publication Number | Publication Date |
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| CN109183802A true CN109183802A (en) | 2019-01-11 |
Family
ID=64947207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201811175341.7A Pending CN109183802A (en) | 2018-10-10 | 2018-10-10 | A kind of construction method for protecting municipal pipeline |
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| CN (1) | CN109183802A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110528663A (en) * | 2019-09-02 | 2019-12-03 | 广东省建筑工程机械施工有限公司 | A kind of construction method for protecting municipal pipeline |
| CN110797805A (en) * | 2019-11-02 | 2020-02-14 | 陈丹依 | Auxiliary device is laid in municipal works cable pit |
| CN112177006A (en) * | 2020-09-27 | 2021-01-05 | 类维波 | Construction method for protecting municipal pipeline |
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| CN2636996Y (en) * | 2003-09-09 | 2004-09-01 | 张方 | Soil flushing water gun |
| CN1554834A (en) * | 2003-12-23 | 2004-12-15 | 南京华卓电子实业有限公司 | Safe pipeline digging system and its digging method |
| CN104727329A (en) * | 2015-03-05 | 2015-06-24 | 四川大学 | Slope cutting method based on high-pressure water jet technique |
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2018
- 2018-10-10 CN CN201811175341.7A patent/CN109183802A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2636996Y (en) * | 2003-09-09 | 2004-09-01 | 张方 | Soil flushing water gun |
| CN1554834A (en) * | 2003-12-23 | 2004-12-15 | 南京华卓电子实业有限公司 | Safe pipeline digging system and its digging method |
| CN104727329A (en) * | 2015-03-05 | 2015-06-24 | 四川大学 | Slope cutting method based on high-pressure water jet technique |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110528663A (en) * | 2019-09-02 | 2019-12-03 | 广东省建筑工程机械施工有限公司 | A kind of construction method for protecting municipal pipeline |
| CN110797805A (en) * | 2019-11-02 | 2020-02-14 | 陈丹依 | Auxiliary device is laid in municipal works cable pit |
| CN112177006A (en) * | 2020-09-27 | 2021-01-05 | 类维波 | Construction method for protecting municipal pipeline |
| CN112177006B (en) * | 2020-09-27 | 2021-08-27 | 类维波 | Construction method for protecting municipal pipeline |
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Application publication date: 20190111 |