CN106978843A - Municipal drainage pipeline construction technology - Google Patents
Municipal drainage pipeline construction technology Download PDFInfo
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- CN106978843A CN106978843A CN201710276350.4A CN201710276350A CN106978843A CN 106978843 A CN106978843 A CN 106978843A CN 201710276350 A CN201710276350 A CN 201710276350A CN 106978843 A CN106978843 A CN 106978843A
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- pipe
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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
Abstract
The invention discloses a kind of municipal drainage pipeline construction technology, its drip irrigation device is：Including surveying setting-out, beat steel sheet pile and precipitation, channel excavation, pipeline foundation, pipeline laying, inspection shaft and build by laying bricks or stones, closed-water test, trench backfill and extract steel sheet pile；With improving its construction quality, reduction difficulty of construction, shortening the construction period, the effect of surrounding pipeline safety is improved.
Description
Technical field
The present invention relates to urban architecture engineering construction field, more specifically, it relates to which a kind of municipal drainage pipeline is constructed
Technique.
Background technology
Geology is more complicated in urban road widening and improving project, and the construction period should be considered during construction, is considered again
Close traffic problem, if routinely construction method is constructed（Fluting slope, fluting supporting）It cannot be guaranteed that the peace of Adjacent Buildings
Entirely, while construction cost is improved, it is impossible to ensure the duration；Also in conventional construction method, need to take one using slot grooving
Fixed groove timbering measure, once construction environment changes, execution conditions are complicated, and the construction period is longer, and surrounding pipeline can not
Ensure safety, so as to reduce construction quality reduction.
The content of the invention
In view of the deficienciess of the prior art, it is an object of the invention to provide a kind of municipal drainage pipeline construction technology,
With the effect for improving its construction quality.
To achieve the above object, the invention provides following technical scheme：
A kind of municipal drainage pipeline construction technology, comprises the following steps：
S1, surveying setting-out：The measure of ditch groove center, excavating sideline positioning and center absolute altitude is carried out, and encrypts the wire of construction
Point and bench mark；
S2, beat steel sheet pile and precipitation：Interim horizontal supporting system is added to go along with sb. to guard him using steel sheet pile buried excavation section, heavy excavation is applied
Work, and artificial rainmaking is used to the foundation ditch of buried depth≤3.5 meter；
S3, channel excavation：Channel excavation depth is less than 2 meters and excavated using slope；Cutting depth uses steel sheep pile support more than 2 meters
Go along with sb. to guard him, support level distance is 2.5 meters, and be excavated to 1.2 meters and be supported using waling plate and steel pipe；
S4, pipeline foundation：The absolute altitude of elevation model is checked before foundation construction, the bottom on basis is dug according to design requirement
Remove, trim slots bottom, remove mud and hack, pipe substrate absolute altitude is backfilled to gravel sand, compaction in layers passes through armored concrete bottom
Plate makes reinforced concrete pipeline foundation, and after after the hardening of reinforced concrete pipeline surface of base, pipe centerline is ejected in its end face；
S5, pipeline laying：Reinforced concrete pipeline foundation is poured, and intensity starts row and set comb up to after more than 70%；
S6, inspection shaft are built by laying bricks or stones：Caliber, direction and the absolute altitude that inspection shaft reserves sewer pipe all should meet design requirement, reserve sewer pipe
Top should connect flat with interior wall, and the junction of inspection shaft and sewer pipe uses 1:2 cement mortar smear triangle seam at 45 °；
S7, closed-water test：The examination that first added water on request when closing water is closed 20 minutes, after carrying out formally closing water after stable level, closes Shui Shui
Head should be 2 meters above of top in inspection section upstream line, calculate the average value of water level decreasing in 30 minutes；
S8, trench backfill：The uniform backfill simultaneously of drainage pipeline both sides, the both sides discrepancy in elevation must not exceed 30 centimetres, more than tube top 50 lis
Earth backing layering leveling in the range of rice, and the compactness of groove earth backing is successively checked；
S9, extraction steel sheet pile：Banket reach closely knit requirement after steel sheet pile is removed, steel sheet pile interval is pulled out, and in time
Sand is filled, keeps soil layer closely knit, and the sheet pile of extraction is cleared up, maintained, and is distinguished by its length and bending, the degree damaged
Stack, one simultaneously neat.
It is arranged such, each orientation of construction can be accurately determined to, overall related data reduces construction by bench mark
Error；By beating steel sheet pile and precipitation, the stability during the Construction of sewer that it entirely constructs is improved, is passed through simultaneously
Artificial rainmaking, which can reach, to be easy to carry out the reparation that relaxes to dry soil layer；Drainage pipeline can be improved by channel excavation and carry out draining
And to the stability of groove construction, the soil layer that being supported using waling plate and steel pipe can reduce on groove is collapsed；Pipeline
Foundation construction is places the substrate of drainpipe band, while excavating to the bottom on basis, trim slots bottom, removes mud and broken
Soil, pipe substrate absolute altitude is backfilled to gravel sand, and compaction in layers reaches and is easy to constructing operation；When be poured and intensity up to 70% with
After upper, implement pipeline laying, built by laying bricks or stones while carrying out inspection shaft, improve the connective stability between pipeline and inspection shaft, on the one hand
The stable connection performance between pipeline can be improved, and then reaches the sealing property between raising pipeline, and between inspection shaft
Sealing property；The drainage performance and water resistance of inspection shaft and pipeline can be improved by closed-water test, be easy to repair again with
Improve, the construction monitoring of pipeline, reparation well etc. when improving construction improves the security performance and construction matter of Construction of sewer
Amount；The overall construction stability of drainage pipeline is improved after backfill, by one layer of one earth backing, compacting degree during backfill is improved, makes to apply
Entirety after work is wound up；Banket reach closely knit requirement after steel sheet pile is removed, steel sheet pile interval is pulled out, and in time
Sand is filled, keeps soil layer closely knit；Construction is added drainage pipeline and is repaired after well, place is replied original appearance, keep postorder place
Use, with improve its construction quality, reduction difficulty of construction, shorten the construction period, improve surrounding pipeline safety effect.
Further set：The surveying setting-out includes：（1）Verification bench mark simultaneously sets up interim at one along one every 60 meters
Bench mark；（2）Measurement pipe road ground elevation, pipe centerline, box cut sideline and construct object location；（3）According to each pipeline
Unit tell somebody what one's real intentions are and project management department scene investigates the conditions on the spot, contact and coordinate with each pipeline unit, discharge pipe canal digging model
Enclose interior buried pipeline；（4）After excavation is tested pits, its excavation slope value and sliding-resistant system are determined.
It is arranged such, accurately each orientation of construction can be determined by bench mark, reduce construction error, by existing
Field prospecting understood Optimizing construction orientation to former water pipe layout, improved the effect of the precision constructed and safe construction.
Further set：The channel excavation includes：（1）Cut the earth using excavator, trough rim, mound are banked up in the part earthwork
It is more than 2 meters from groove back gauge, mound is highly less than 1.5 meters, unnecessary earthwork outward transport；（2）Shoveling should work in coordination with support, dig
Pick machine is supported in time after cutting the earth；（3）When digging depth is to 1.2m, fastener baffle plate is cut the earth with fagging alternately, after deburring immediately
Fagging, each fagging is highly generally 0.6~0.8 meter；（4）When digging depth is to 2 meters, answers and supportted at first 0.6~0.8 meter away from ground
Head falls to support, and the level interval of steel sheep pile support is 2 meters, and PH pipe diameters are not more than 3 meters, and the vertical interval of support is not more than 2 meters；
（5）Offer gutter in the bottom land both sides of groove, set sump one in 30m or so and set pump drainage, sump diameter or
Width is in 0.6~0.8m, and depth uses bamboo and wood or brick Simple reinforced in 0.7~1m, crater wall, and spreads in shaft bottom rubble filter
Water layer.
It is arranged such, the earthwork is stacked in and is more than 2 meters from groove back gauge, on the one hand can reduce mound and groove is squeezed
Pressure, makes groove cave in or be influenceed on the size of excavation, is on the other hand easy to being constructed near groove；Baffle plate is thrown by city
The slurry trench stability performance of groove can be stablized, be easy to lasting construction, the construction safety performance of groove is improved, while gutter is conducive to
Carry out draining to groove, rubble drainage layer can also improve the stability of groove with and play a part of certain drainage, reduce
Bottom rainwater dilutes to the soil of groove, improves the compacting degree of groove bottom.
Further set：The pipeline laying includes：（1）Bottom absolute altitude is defined in pipe during comb, at well location during comb,
The internal diameter size of inspection shaft should be controlled；（2）Pipeline fracture, groove, cleaning conduit section and surface are carried out by program；（3）Inspection
Pipe socket and rubber ring quality are looked into, the working face of material is cleared up；（4）In the groove that rubber ring is arranged on to bellmouth, bellmouth should
For the direction that meets water；（5）With tape measure bellmouth depth, and scored marks in tubing socket end, label size should be the depth of bellmouth
The 0.8-0.85% of degree；（6）Lubricant is dipped in covering with paint or varnish, is uniformly brushed on the inside of rubber ring and on the outside of tubing socket；（7）Keep
Connecting tube straightened condition, is directed at bellmouth by pipeline socket, is manually once inserted into mark；Finally bell and spigot is inserted with clearance gauge
Gap, peripherally checks rubber ring installation site；（8）The position that pipeline is connected with inspection shaft uses short tube, inspection shaft brick
Wall short tube exposed parts are preferably less than 600 millimeters, and pipe muscle should be full positioned at brick wall part mortar, are seeped water to prevent seam crossing.
Be arranged such, make pipeline cleaner, improve pipeline between welded seal performance, and be easy to adjacent channel it
Between operating characteristics, while using rubber ring can improve pipeline sealing welding act on, on the one hand can improve the company between pipeline
Stability is connect, and then reaches the sealing property between raising pipeline, and the sealing property between inspection shaft.
Further set：The inspection shaft, which is built by laying bricks or stones, to be comprised the following steps：（1）Inspection shaft size is set according to the logical figure of row and drawing
Size is counted, and is carried out on the concrete bed course poured；（2）Inspection shaft basis should simultaneously be poured with pipeline foundation；（3）Check well stream
Groove uses brick masonry, and the height of chute should be 1/2nd of caliber, and two shoulders are overboard to centre, and use 1:2 cement mortar are smeared
Face, inspection shaft, which is built to desired height, lays prefabricated reinforced concrete cover plate, and cover plate adjusts brick wall height according to road horizontal slope
Lay, should be first in brick wall top surface seat 1 when cover plate is laid:2 cement mortar, and thickness is 5 millimeters, cover plate then is laid into place, lid
Plate surrounding uses 1:2 cement mortar depressed places jail, smears triangle seam at 45 °, and seam height is 50 millimeters, and laying should be first in lid before cast iron cover base
The reserved groove inner seat 1 of plate:2 cement mortar, thickness is 1 millimeter, and cage, cage surrounding pea gravel concreten are laid after correction absolute altitude
Depressed place jail.
It is arranged such, inspection shaft chute uses brick masonry, improves the compactedness of inspection shaft, be easy to the later stage to pass through inspection shaft pair
The inspection and reparation of pipeline, the effect with the construction quality for improving inspection shaft.
Further set：The closed-water test comprises the following steps：（1）Close before water, mortar joint and concrete should reach
Some strength, pipeline should first pour water 24 hours, be thoroughly impregnated pipeline；（2）The examination that first adds water is closed 20 minutes, treats that water level decreasing is stable
Afterwards, carry out formally closing water, calculate 30 minutes water level decreasing average value.
It is arranged such, the drainage performance and water resistance of inspection shaft and pipeline can be improved by closed-water test, is easy to again
Secondary maintenance is with improving, pipeline when improving construction, the construction monitoring for repairing well etc., improve Construction of sewer security performance and
Construction quality.
Further set：The trench backfill comprises the following steps：（1）Tear plate earth backing open:Pipeline acceptance of concealed work is qualified
Afterwards, bottom land debris is cleaned out before earth backing immediately, earth backing；（2）During earth backing in groove must not ponding, tear open plate earth backing should by under
And on order, successively carry out, tear plate open every time and typically must not exceed 45 centimetres；（3）Tear same day earth backing after plate open；（4）Pipeline both sides
Simultaneously uniform it should backfill, the both sides discrepancy in elevation must not exceed 30 centimetres, the earth backing layering leveling more than tube top in 50 cm ranges, and it is right
The compactness of groove earth backing is successively checked；（5）The equipment such as fagging, the dagger pulled down should in time be cleared up, maintained and neat heap
Put.
It is arranged such, improves the cleannes of groove, while improving the overall construction stability of drainage pipeline after backfill, passes through
One layer of one earth backing, improves compacting degree during backfill；Simultaneously backfill after Density Detection is carried out to it, can implementing monitoring construction construction
Quality, is easy to further optimization and improves, and is cleared up after finally having constructed, improves the cleannes and construction environment after construction.
By using above-mentioned technical proposal, the present invention is compared compared with the prior art：By between drainage pipeline, inspection shaft
Connection sealing, and to construction period carry out examinations, with improve its construction quality, reduction difficulty of construction, shorten apply
The work duration, improve the effect of surrounding pipeline safety.
Embodiment
Municipal drainage pipeline construction technology is described further below.
A kind of municipal drainage pipeline construction technology, includes surveying setting-out, beats steel sheet pile and precipitation, channel excavation, pipeline
Basis, pipeline laying, inspection shaft are built by laying bricks or stones, closed-water test, trench backfill and extract steel sheet pile, and its Specific construction step is as follows.
First, surveying setting-out includes following steps
The measure of ditch groove center, excavating sideline positioning and center absolute altitude is carried out, and encrypts the traverse point and bench mark of construction, is made
Each operation position and elevation are measured in construction at any time.
（1）Verification bench mark simultaneously sets up temporary bench mark at one along every 60 meters；
（2）Measurement pipe road ground elevation, pipe centerline, box cut sideline and construct object location；
（3）According to each pipeline unit tell somebody what one's real intentions are and project management department scene investigates the conditions on the spot, contact and assist with each pipeline unit
Adjust, the buried pipeline in the range of discharge pipe canal digging；
（4）After excavation is tested pits, its excavation slope value and sliding-resistant system are determined.
2nd, steel sheet pile and precipitation are beaten
Interim horizontal supporting system is added to go along with sb. to guard him using steel sheet pile buried excavation section, heavy excavation construction, and to buried depth≤3.5 meter
Foundation ditch use artificial rainmaking.
3rd, channel excavation includes following steps
This engineering is using the method construction being manually combined with machinery；Channel excavation depth is excavated when being less than 2 meters using slope, is opened
Dig depth to go along with sb. to guard him using steel sheep pile support more than 2 meters, support level distance is 2.5 meters；With digging with support, first layer soil is excavated to
1.2 meters this be supported using waling plate and 209 steel pipes；To ensure that groove is stable, cutting depth is designed altogether in the range of 5 meters
Two roads support and enclose purlin plate, dig to 0.5 meter of trench bottom place, for last one of the temporary support of setting, after the completion for the treatment of basis, before comb
Remove.
（1）Using machinery（Excavator）Cut the earth, the part earthwork（Backfill part）Trough rim is banked up, mound is from groove back gauge not
2 meters must be less than, mound highly cannot be greater than 1.5 meters；Unnecessary earthmoving machinery outward transport；
（2）Shoveling should be worked in coordination with support, and excavator is supported in time after cutting the earth, and is prevented cell wall unstability and is caused groove to cave in；
（3）Excavator is cut the earth and takes retrusive shoveling method, is forbidden excavator to enter and is not set in the region of support；
（4）,, should if meeting soft soil or Changes in weather when digging depth is to 1.2 meters, it is necessary to fastener baffle plate in the construction of fagging method
Fagging in advance, cuts the earth with fagging alternately later, fagging immediately after deburring, highly generally 0.6~0.8 meter of each fagging,
If soil property is soft or rainy answer and adds support at timely fagging；Wale piece encloses purlin, length 4m using steel；Perpendicular strake uses channel-section steel,
Length is not less than gash depth, and dagger sleeve level interval is not more than 2.5 meters（PH pipes are not more than 3 meters）, vertical interval is not more than
1.5 meters, first gear iron dagger should be 0.6~0.8 meter apart from ground；
（5）When digging depth is to 2 meters, fastener road support at first 0.6~0.8 meter away from ground is answered；The level interval of steel sheep pile support
For 2 meters；PH pipes are not more than 3 meters, and the vertical interval of support is not more than 2 meters；
（6）Draining trench is dug out in bottom land both sides, sump one is set at 30 meters or so and pump drainage is set.Sump diameter or width
Spend at 0.6~0.8 meter, depth is at 0.7~1 meter, and crater wall uses bamboo and wood or brick Simple reinforced, and rubble is spread in shaft bottom and filter
Water layer；
（7）The strict elevation control of machinery shoveling, prevents basal surface of backbreaking or disturb, and is used instead when digging to more than bottom land absolute altitude 20 centimetres
Excavated by manual work is removed, and is repaiied when digging, and carry out foundation construction as early as possible；
（8）Excavating the debris such as loose ground, mud, boulder in groove in groove must be removed, and holding is not soaked.
4th, channel excavation
The absolute altitude of elevation model must be checked before foundation construction, basic bottom is removed by excavated by manual work, trim slots bottom, remove mud and
Hack, if any backbreaking, is tamped with gravel sand or old material；, should when section of tubing basis is seated on fill stratum according to design requirement
Fill stratum is cut out, pipe substrate absolute altitude, compaction in layers are backfilled to gravel sand.
Treat channel excavation finish and without ponding in the case of, start from pipeline foundation, reinforced concrete pipeline foundation is used
C25, thick 200 millimeters of reinforced concrete floors, pipeline rest the head on positioning using prefabricated pipe, and bottom plate divides into the plain concrete bed courses of 100mm thickness C10；
When precast concrete pipe pillow is laid on the basis of, it should place steady, it is uniform in point, it should keep 200~300 millis from tube coupling end
Rice；Then by there is surveyor to release the basic sideline of concrete as the control line of supporting module, nine clamping plates of template, concrete Commercial Concrete pump
Mould is sent into, poker vibrator vibration compacting is used.After after concrete Surface hardened layer, pipe centerline is ejected above.
5th, pipeline laying
Preparation of construction：A, design working drawing and other files are complete, and have been confided a technological secret；B, pipeline and auxiliary construction seat
Mark and ttom of pipe absolute altitude have determined that at the scene；C, the product for entering job site have the quality certification of quality inspection department of factory, and had
Visible marking, being had using preceding discovery should reject before defect, deformation etc..
Concrete basis is poured, and intensity is up to that can start comb after more than 70%, and step is as follows：
（1）Bottom absolute altitude is defined in pipe during comb, at well location during comb, should control the internal diameter size of inspection shaft；
（2）Pipeline fracture, groove, cleaning conduit section and surface are carried out by program；
（3）Pipe socket and rubber ring quality are checked, the working face of material is cleared up；
（4）In the groove that rubber ring is arranged on to bellmouth, bellmouth should be the direction that meets water；
（5）With tape measure bellmouth depth, and scored marks in tubing socket end, label size should be the depth of bellmouth
0.8-0.85%；
（6）Lubricant is dipped in covering with paint or varnish, is uniformly brushed on the inside of rubber ring and on the outside of tubing socket；
（7）Connecting tube straightened condition is kept, pipeline socket is directed at bellmouth, mark is manually once inserted into.Finally with plug
Chi inserts bell and spigot gap, peripherally checks rubber ring installation site；
（8）The position that pipeline is connected with inspection shaft uses short tube, and inspection shaft brick wall short tube exposed parts are preferably less than 600 millimeters, pipe
Muscle should be full positioned at brick wall part mortar, is seeped water to prevent seam crossing.
6th, inspection shaft, which is built by laying bricks or stones, includes following steps
（1）Inspection shaft size is carried out according to the logical figure of row and layout design size on the concrete bed course poured, when soil property is poor
Using reinforced concrete bottom plate；
（2）Inspection shaft basis should simultaneously be poured with pipeline foundation；
（3）Inspection shaft chute uses brick masonry, and the height of chute should be 1/2nd of caliber, and two shoulders are overboard to centre, and adopt
With 1:2 cement sand plasters, inspection shaft, which is built to desired height, lays prefabricated reinforced concrete cover plate, and cover plate is horizontal according to road
Slope adjustment brick wall is highly laid, should be first in brick wall top surface seat 1 when cover plate is laid:2 cement mortar, and thickness is 5 millimeters, then will lid
Plate lays in place, and cover plate surrounding uses 1:2 cement mortar depressed places jail, smears triangle seam at 45 °, and seam height is 50 millimeters, lays cast iron
Should be first in the reserved groove inner seat 1 of cover plate before cage:2 cement mortar, thickness is 1 millimeter, and cage, cage four are laid after correction absolute altitude
Week is firm with pea gravel concreten depressed place.
（4）Caliber, direction and the absolute altitude that inspection shaft reserves sewer pipe all should meet design requirement, and the top for reserving sewer pipe should be with
Interior wall connects flat, and the junction of inspection shaft and sewer pipe uses 1:2 cement mortar smear triangle seam at 45 °；
（5）Quality requirement：A, inspection shaft inwall must be mutually perpendicular to, and mortar joint mortar is filled with enough, and is firmly bonded, paint it is smooth, it is not permeable not
Leakage, does not flake, not crack；Without rubbish in b, well.The debris such as remaining mortar；C, the interim measure done during construction must not be remained；
D, cage must be complete, do not rupture, not unfilled corner.
7th, closed-water test
Sewage conduct must be section by section（Pipeline between two inspection shafts is a section）Water inspection is closed, storm sewer is regional extremely in flour sand
Few every four to save to take out and close a section, the backfill of groove both sides could be carried out after the assay was approved by closing water；Diameter is equal to or less than 800 millimeters
Pipeline water is closed using pound cylinder, the pipeline that diameter is equal to or more than 1000 millimeters closes water using inspection shaft；Should be on request when closing water
The examination that first adds water is closed 20 minutes, after just carrying out formally closing water after stable level, calculates the average value of water level decreasing in 30 minutes；Close water
Head should be in inspection section upstream line more than top 2 meters；Specifically include following steps：
（1）Close before water, mortar joint and concrete should reach some strength, and pipeline should first pour water 24 hours, pipeline is fully soaked
Thoroughly；
（2）The examination that first adds water is closed 20 minutes, after water level decreasing is stable, carries out formally closing water, is calculated 30 minutes water level decreasings and is averaged
Value.
8th, trench backfill comprises the following steps
（1）Tear plate earth backing open：Tearing plate earth backing open should be carried out after pipeline acceptance of concealed work is qualified, all to have possessed earth backing condition, all should
Earth backing immediately.Bottom land odds and ends (straw bag, template and support equipment etc.) must be cleaned out before earth backing；
（2）During earth backing in groove must not ponding, tearing plate earth backing open should successively be carried out by order from bottom to top, torn open plate every time general
45cm is must not exceed, soil property is poor or support is walked about if meeting, and must not exceed 30cm；
（3）Tear necessary same day earth backing after plate open, during earth backing, mud, humus, frozen soil, organic substance must not be backfilled, and be more than
The lump debris such as 10cm building stones, big clod should be broken into pieces；
（4）Pipeline both sides simultaneously uniform should be backfilled, and the both sides discrepancy in elevation must not exceed 30cm, during earth backing, soil must not be directly discharged at into pipe
On pipeline joint, the earth backing in the range of tube top above 50cm must be layered leveling.The compactness of groove earth backing is successively checked；
（5）The equipment such as fagging, the dagger pulled down should in time be cleared up, maintained and neatly stack, and accomplish that the complete field of work is clear.
9th, steel sheet pile is extracted
Banket reach closely knit requirement after steel sheet pile is removed, steel sheet pile interval is pulled out, and fills sand in time, keeps soil layer close
It is real, and the sheet pile of extraction is cleared up, maintained, and stacked respectively by its length and bending, the degree damaged, one and together.
Described above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (7)
1. a kind of municipal drainage pipeline construction technology, it is characterised in that comprise the following steps：
S1, surveying setting-out：The measure of ditch groove center, excavating sideline positioning and center absolute altitude is carried out, and encrypts the wire of construction
Point and bench mark；
S2, beat steel sheet pile and precipitation：Interim horizontal supporting system is added to go along with sb. to guard him using steel sheet pile buried excavation section, heavy excavation is applied
Work, and artificial rainmaking is used to the foundation ditch of buried depth≤3.5 meter；
S3, channel excavation：Channel excavation depth is less than 2 meters and excavated using slope；Cutting depth uses steel sheep pile support more than 2 meters
Go along with sb. to guard him, support level distance is 2.5 meters, and be excavated to 1.2 meters and be supported using waling plate and steel pipe；
S4, pipeline foundation：The absolute altitude of elevation model is checked before foundation construction, the bottom on basis is dug according to design requirement
Remove, trim slots bottom, remove mud and hack, pipe substrate absolute altitude is backfilled to gravel sand, compaction in layers passes through armored concrete bottom
Plate makes reinforced concrete pipeline foundation, and after after the hardening of reinforced concrete pipeline surface of base, pipe centerline is ejected in its end face；
S5, pipeline laying：Reinforced concrete pipeline foundation is poured, and intensity starts row and set comb up to after more than 70%；
S6, inspection shaft are built by laying bricks or stones：Caliber, direction and the absolute altitude that inspection shaft reserves sewer pipe all should meet design requirement, reserve sewer pipe
Top should connect flat with interior wall, and the junction of inspection shaft and sewer pipe uses 1:2 cement mortar smear triangle seam at 45 °；
S7, closed-water test：The examination that first added water on request when closing water is closed 20 minutes, after carrying out formally closing water after stable level, closes Shui Shui
Head should be 2 meters above of top in inspection section upstream line, calculate the average value of water level decreasing in 30 minutes；
S8, trench backfill：The uniform backfill simultaneously of drainage pipeline both sides, the both sides discrepancy in elevation must not exceed 30 centimetres, more than tube top 50 lis
Earth backing layering leveling in the range of rice, and the compactness of groove earth backing is successively checked；
S9, extraction steel sheet pile：Banket reach closely knit requirement after steel sheet pile is removed, steel sheet pile interval is pulled out, and in time
Sand is filled, keeps soil layer closely knit, and the sheet pile of extraction is cleared up, maintained, and is distinguished by its length and bending, the degree damaged
Stack, one simultaneously neat.
2. municipal drainage pipeline construction technology according to claim 1, it is characterised in that the surveying setting-out includes：
（1）Verification bench mark simultaneously sets up temporary bench mark at one along one every 60 meters；
（2）Measurement pipe road ground elevation, pipe centerline, box cut sideline and construct object location；
（3）According to each pipeline unit tell somebody what one's real intentions are and project management department scene investigates the conditions on the spot, contact and assist with each pipeline unit
Adjust, the buried pipeline in the range of discharge pipe canal digging；
（4）After excavation is tested pits, its excavation slope value and sliding-resistant system are determined.
3. municipal drainage pipeline construction technology according to claim 1, it is characterised in that the channel excavation includes：
（1）Cut the earth using excavator, trough rim is banked up in the part earthwork, mound is more than 2 meters from groove back gauge, and mound is highly less than
1.5 meters, unnecessary earthwork outward transport；
（2）Shoveling should be worked in coordination with support, and excavator is supported in time after cutting the earth；
（3）When digging depth is to 1.2m, fastener baffle plate is cut the earth with fagging alternately, fagging immediately after deburring, each fagging is high
Generally 0.6~0.8 meter of degree；
（4）When digging depth is to 2 meters, fastener at first 0.6~0.8 meter away from ground is answered to fall to support, the level interval of steel sheep pile support
For 2 meters, PH pipe diameters are not more than 3 meters, and the vertical interval of support is not more than 2 meters；
（5）Gutter is offered in the bottom land both sides of groove, sump one is set in 30m or so and sets pump drainage, sump is straight
Footpath or width use bamboo and wood or brick Simple reinforced in 0.6~0.8m, depth in 0.7~1m, crater wall, and spread in shaft bottom broken
Stone drainage layer.
4. municipal drainage pipeline construction technology according to claim 1, it is characterised in that the pipeline laying includes：
（1）Bottom absolute altitude is defined in pipe during comb, at well location during comb, should control the internal diameter size of inspection shaft；
（2）Pipeline fracture, groove, cleaning conduit section and surface are carried out by program；
（3）Pipe socket and rubber ring quality are checked, the working face of material is cleared up；
（4）In the groove that rubber ring is arranged on to bellmouth, bellmouth should be the direction that meets water；
（5）With tape measure bellmouth depth, and scored marks in tubing socket end, label size should be the depth of bellmouth
0.8-0.85%；
（6）Lubricant is dipped in covering with paint or varnish, is uniformly brushed on the inside of rubber ring and on the outside of tubing socket；
（7）Connecting tube straightened condition is kept, pipeline socket is directed at bellmouth, mark is manually once inserted into；Finally with plug
Chi inserts bell and spigot gap, peripherally checks rubber ring installation site；
（8）The position that pipeline is connected with inspection shaft uses short tube, and inspection shaft brick wall short tube exposed parts are preferably less than 600 millimeters, pipe
Muscle should be full positioned at brick wall part mortar, is seeped water to prevent seam crossing.
5. municipal drainage pipeline construction technology according to claim 1, it is characterised in that the inspection shaft build by laying bricks or stones including with
Lower step：
（1）Inspection shaft size is carried out according to the logical figure of row and layout design size on the concrete bed course poured；
（2）Inspection shaft basis should simultaneously be poured with pipeline foundation；
（3）Inspection shaft chute uses brick masonry, and the height of chute should be 1/2nd of caliber, and two shoulders are overboard to centre, and adopt
With 1:2 cement sand plasters, inspection shaft, which is built to desired height, lays prefabricated reinforced concrete cover plate, and cover plate is horizontal according to road
Slope adjustment brick wall is highly laid, should be first in brick wall top surface seat 1 when cover plate is laid:2 cement mortar, and thickness is 5 millimeters, then will lid
Plate lays in place, and cover plate surrounding uses 1:2 cement mortar depressed places jail, smears triangle seam at 45 °, and seam height is 50 millimeters, lays cast iron
Should be first in the reserved groove inner seat 1 of cover plate before cage:2 cement mortar, thickness is 1 millimeter, and cage, cage four are laid after correction absolute altitude
Week is firm with pea gravel concreten depressed place.
6. municipal drainage pipeline construction technology according to claim 1, it is characterised in that the closed-water test includes following
Step：
（1）Close before water, mortar joint and concrete should reach some strength, and pipeline should first pour water 24 hours, pipeline is fully soaked
Thoroughly；
（2）The examination that first adds water is closed 20 minutes, after water level decreasing is stable, carries out formally closing water, is calculated 30 minutes water level decreasings and is averaged
Value.
7. municipal drainage pipeline construction technology according to claim 1, it is characterised in that the trench backfill includes following
Step：
（1）Tear plate earth backing open, after pipeline acceptance of concealed work is qualified, earth backing immediately is cleaned out bottom land odds and ends before earth backing；
（2）During earth backing in groove must not ponding, tearing plate earth backing open should successively be carried out by order from bottom to top, torn open plate every time general
It must not exceed 45 centimetres；
（3）Tear same day earth backing after plate open；
（4）Pipeline both sides simultaneously uniform should be backfilled, and the both sides discrepancy in elevation must not exceed 30 centimetres, more than tube top answering in 50 cm ranges
Soil layering leveling, and the compactness of groove earth backing is successively checked；
（5）The equipment such as fagging, the dagger pulled down should in time be cleared up, maintained and neatly stack.
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