CN109888712A - The backfill protection structure and method of deep basal pit top high-voltage power pipeline - Google Patents
The backfill protection structure and method of deep basal pit top high-voltage power pipeline Download PDFInfo
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- CN109888712A CN109888712A CN201910193813.XA CN201910193813A CN109888712A CN 109888712 A CN109888712 A CN 109888712A CN 201910193813 A CN201910193813 A CN 201910193813A CN 109888712 A CN109888712 A CN 109888712A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000005611 electricity Effects 0.000 claims abstract description 48
- 239000004567 concrete Substances 0.000 claims abstract description 45
- 238000012216 screening Methods 0.000 claims abstract description 33
- 239000004576 sand Substances 0.000 claims abstract description 25
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 12
- 230000002787 reinforcement Effects 0.000 claims abstract description 7
- 238000009413 insulation Methods 0.000 claims description 22
- 238000013461 design Methods 0.000 claims description 10
- 239000004568 cement Substances 0.000 claims description 2
- 229920005597 polymer membrane Polymers 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 28
- 239000010410 layer Substances 0.000 description 36
- 239000011241 protective layer Substances 0.000 description 14
- 238000010586 diagram Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
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Abstract
The invention discloses a kind of backfill of deep basal pit top high-voltage power pipeline protection structure and methods, comprising: sand bedding course, Cement-Screening layer and reinforced concrete cover plate；The lower section of high-tension electricity pipeline is arranged in the sand bedding course, and the Cement-Screening layer is filled to the setting range above high-tension electricity pipeline；On Cement-Screening layer, in the range of covering high-tension electricity pipeline two sides set distance, pouring reinforcement concrete cover board.The invention has the advantages that: be directed to different structure structure patterns; the spatial relation at structures top and pipeline; it takes and targetedly backfills safeguard measure, to being difficult to move the backfill protection problem for the high-tension electricity pipeline for changing original place protection in the Municipal Engineering Constructions such as adequate solution urban track traffic construction, underground space comprehensive exploitation.
Description
Technical field
The present invention relates to the Municipal Engineering Constructions technical fields such as urban track traffic construction, underground space comprehensive exploitation, tools
Body is related to the backfill protection structure and method of a kind of deep basal pit top high-voltage power pipeline.
Background technique
Only there is provided background technical informations related to the present invention for the statement of this part, it is not necessary to so constitute first skill
Art.
In the municipal administrations such as urban track traffic open-cut station and affiliated facility deep pit construction, underground space comprehensive exploitation
It in engineering construction, is frequently run onto various pipelines and is difficult to move the problem of changing, generally use original place safeguard measure, the main body knot constructed
After structure completion and acceptance(check), backfill processing is carried out to original protection pipeline position, usually because of pipeline and structure clear distance is smaller, pipeline
The problems such as buried depth, not only brings biggish hidden danger to the safe operation of pipeline, it is also possible to influence pipeline top when directly backfilling
Road and pedestrian, neighbouring buildings or structures safety, there are biggish security risks.
Inventors have found that the pipeline of original place protection at present is simple for the first time using carrying out after directly backfill soil body 50cm or more
It tamps or rolls, require backfill to roll further according to backfill, restore road surface original appearance.This method lacks the reliably protecting to pipeline, especially
It is for the first time tamp or roll, easily former pipeline is caused to damage, influence former pipeline using safe and safe operating life, it is right
Security risk is inevitably buried in the direct backfill of the high-tension electricity pipeline, burning line of original place protection.
Summary of the invention
To solve the above-mentioned problems, the invention proposes a kind of backfills of deep basal pit top high-voltage power pipeline to protect structure
And method, high-tension electricity pipeline during backfilling of earthwork on across foundation pit structure are protected, and original place protection is effectively evaded
Pipeline directly backfills bring series drawback, ensure that the operation security of pipeline.
To achieve the goals above, the present invention adopts the following technical scheme:
As the first embodiment of the invention, a kind of backfill protection of deep basal pit top high-voltage power pipeline is disclosed
Structure, comprising: sand bedding course, Cement-Screening layer and reinforced concrete cover plate；The sand bedding course is arranged under high-tension electricity pipeline
Side, the Cement-Screening layer are filled in above high-tension electricity pipeline in setting range；On Cement-Screening layer, covering high-voltage electricity
In the range of the set distance of solenoid line two sides, pouring reinforcement concrete cover board.
According to practice of construction condition, concrete cushion and watertight insulation, reinforcing bar are successively laid on Cement-Screening layer
Concrete cover is placed on watertight insulation.
As second of embodiment of the invention, a kind of backfill protection of deep basal pit top high-voltage power pipeline is disclosed
Method, comprising: when high-tension electricity pipeline is backfilled, setting can at least cover high-tension electricity in the lower section of high-tension electricity pipeline
The sand bedding course of pipeline width, in the setting range of high-tension electricity pipeline bottom to top, filling concrete aggregate chips layer；In Behavior of Hardened Cement Paste
It considers to be worth doing on layer, in the range of covering high-tension electricity pipeline two sides set distance, pouring reinforcement concrete cover board.
According to practice of construction condition, concrete cushion and watertight insulation, reinforcing bar are successively laid on Cement-Screening layer
Concrete cover is placed on watertight insulation.
It is poor to exist in terms of the gradient, original structure shape or underground structure absolute altitude to the high-tension electricity pipeline of different sections
Different time carries out backfill protection to the high-tension electricity pipeline of different sections respectively, and backfill protection structure is selected according to the actual situation
It selects.
Compared with prior art, the beneficial effects of the present invention are:
For different structure structure patterns, the spatial relation at structures top and pipeline is taken targetedly
Backfill safeguard measure, it is right in the Municipal Engineering Constructions such as adequate solution urban track traffic construction, underground space comprehensive exploitation
It is difficult to move the backfill protection problem for the high-tension electricity pipeline for changing original place protection.
Sand bedding course is backfilled in pipeline bottom, is conducive to guarantee that the backfill of pipeline bottom is closely knit, while being conducive to pipeline bottom cushion to have
Preferable bearing capacity；Cement-Screening is laid on pipeline top, forms the concrete cover on pipeline top, the similar original concrete packet of pipeline
Envelope forms the first layer protective layer on pipeline top；
It is both Cement-Screening layer screed-coat to first layer protective layer construction concrete cushion and waterproof layer, concrete cushion,
It is the lower protective layer of waterproof layer again, influence of the underground water to pipeline can be evaded/be reduced to waterproof layer, formed and be similar to pipe culvert
Structure；Waterproof layer top construction reinforced bar concrete slab plays the role of carrying/dispersion ground load.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is the backfill construction process of deep basal pit top high-voltage power pipeline in embodiment one；
Fig. 2 is the floor map of one mesohigh power pipeline of embodiment；
Fig. 3 is the vertical section schematic diagram of one mesohigh power pipeline of embodiment；
Fig. 4 is backfill protection schematic diagram in the cross section A-A in Fig. 2；
Fig. 5 is backfill protection schematic diagram in the cross section B-B in Fig. 2；
Fig. 6 is backfill protection schematic diagram in the cross section C-C in Fig. 2；
Wherein, 1. sand bedding course, 2. Cement-Screening layers, 3. reinforced concrete cover plates, 4. concrete cushions, 5. anti-water segregations
Layer, 6. power pipelines.
Specific embodiment
It is noted that described further below be all exemplary, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms that the present invention uses have logical with the application person of an ordinary skill in the technical field
The identical meanings understood.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
Embodiment one
A kind of backfill protection structure of deep basal pit top high-voltage power pipeline disclosed in one or more embodiments,
High-tension electricity pipeline during backfilling of earthwork on across foundation pit structure is protected, according to different parts pipeline and structure top
The spatial relationship in portion takes different protection schemes.
Wherein, backfilling of earthwork refers to, the pipeline within the scope of influence of foundation excavation carries out foundation pit after carrying out original place protection
After the completion of excavation, structure construction, waterproof construction, carries out backfilling of earthwork and restore original place looks and ecology.
During backfilling of earthwork, different spaces state locating for the bottom, side and top for high-tension electricity pipeline,
Be completed at a distance from structure, use function on ground etc. after backfill, take different protection schemes, guarantee high-tension electricity pipeline
Operation security and ground (underground) buildings or structures safety.
It should be noted that the bottom of high-tension electricity pipeline refers to the gap between pipeline and underground structure top, original place
Protecting pipeline, there are the different gradients, and the original structure shape of different section pipelines is different, and the underground structure of different sections
Absolute altitude have differences, the gap for causing pipeline bottom different location is different.
The side of high-tension electricity pipeline refers to two side positions of pipeline, different right from structures spatial relationship according to pipeline
The guard method answered difference.
There are the biggish gradients when former pipeline is embedded, and rail traffic station accessory structure is because of design structure relationship different parts
Absolute altitude there are biggish differences, which dictates that by backfill protection pipeline different parts and rail traffic station accessory structure top
The different location of plate takes different parts and targetedly backfills protection scheme there are different height difference.
Refer at the top of high-tension electricity pipeline by the top of protection pipeline to the space on ground after backfill, according to pipeline with construct
The spatial relationship of object, the buried depth of pipeline are different, top guard method difference, but need to meet pipeline safety and ground environment
Protection requires.
Ground by protection pipeline is mostly busy road traffic, can carry the loads such as biggish loaded vehicle, biggish ground
Load can generate larger adverse effect to underground utilities, and pipeline buried depth is smaller, and influence of the ground load to pipeline is bigger.For ground
The design load in face and the different buried depth of pipeline should take different reductions/dispersion ground load effective measures, such as: it closes
The thickness and width of reason setting armoured concrete slab.
Data are calculated according to stressing influence of the ground load to different parts pipeline, take arranging for different dispersion geostatic pressures
It applies, the armoured concrete slab of laying setting thickness carries ground load at the set distance of pipeline top, and ground load is uniform
It is distributed to the pipeline periphery soil body, adverse effect of the reduction/elimination ground load to pipeline.
The backfill protection structure of deep basal pit top high-voltage power pipeline specifically includes: sand bedding course 1, Cement-Screening layer 2, coagulation
Soil padding 4, watertight insulation 5 and reinforced concrete cover plate 3；Wherein, the lower section of high-tension electricity pipeline 6 is arranged in sand bedding course 1, pipe
Cement-Screening, 2 top of Cement-Screening layer construction concrete cushion 4 and waterproof are laid in line top, then in covering high-tension electricity pipeline 6
In the range of the set distance of two sides, pouring reinforcement concrete cover board 3.
In the present embodiment, sand bedding course 1 is the fine sand of 100mm thickness, and the width range of sand bedding course 1 should meet design requirement.Water
It is 3% Cement-Screening that mudstone, which considers layer 2 to be worth doing,.
It is high-tension electricity pipeline or burning line that pipeline is protected in original place, and design has protection structure when this kind of pipeline original is embedded,
High-tension electricity pipeline is mostly pipe culvert structure, external wrapping concrete protective layer etc.；Low-pressure fuel gas pipeline is mostly casing protection, more than middle pressure
Burning line mostly uses pipe culvert to protect.
Pipeline described above is exposed after simultaneously former protection because of construction, and former protective layer has been stripped, and still needs to take in backfill
Safeguard procedures, the actual conditions such as surrounding enviroment after restoring with excavation of foundation pit, pipeline buried depth, road surface are related and consider practice of construction
Status should protect the backfill protection that design requirement carries out pipeline according to place where troops were originally stationed.
Pipeline with structure clear distance is smaller, pipeline buried depth is shallow in the case where, construction protection exposure pipeline backfill when still need to
Guarantee the safety of pipeline, the pipeline for creating similar former protection condition buries environment.
According to above-mentioned technical requirements, the backfill of high-tension electricity pipeline 6 is protected according to actual environment condition, in Cement-Screening layer
Concrete cushion 4 and watertight insulation 5 are successively laid on 2, reinforced concrete cover plate 3 is placed on watertight insulation 5.
Wherein, concrete cushion 4 is the C20 concrete of 200mm thickness；Watertight insulation 5 is polymer membranes (P
Class), macromolecule host thickness 1.2mm, coiled material through thickness 1.7mm.
Sand bedding course 1 is backfilled in pipeline bottom, is conducive to guarantee that the backfill of pipeline bottom is closely knit, while being conducive to pipeline bottom cushion to have
Preferable bearing capacity；Cement-Screening is laid on pipeline top, forms the concrete cover on pipeline top, the similar original concrete packet of pipeline
Envelope forms the first layer protective layer on pipeline top；First layer protective layer construction concrete cushion 4 and watertight insulation 5, concrete
Bed course 4 is both the screed-coat of Cement-Screening layer 2 and the lower protective layer of watertight insulation 5, and watertight insulation 5 can evade/
Reduce influence of the underground water to pipeline, forms the structure for being similar to pipe culvert；5 top construction reinforced bar concrete slab of watertight insulation,
The effect of carrying/dispersion ground load.
Structure is protected in backfill in the present embodiment, can backfill protection zone in the pipeline for not having construction electric power pipe culvert,
The structure for being similar to pipe culvert is formed, is in pipeline in the environment similar to pipe culvert.
Embodiment two
The backfill construction process of deep basal pit top high-voltage power pipeline is disclosed in one or more embodiments, is such as schemed
Shown in 1, comprising the following steps:
Structure roof waterproof pours concrete cover, carried out after the completion of underground structure main body construction top plate waterproof construction and
The concrete cover of waterproof is constructed；
Pipeline lower part backfills sand bedding course 1, backfills sand bedding course 1 in pipeline lower part according to design requirement, completes the to pipeline
One layer of protection；
Cement-Screening layer 2 is filled out on pipeline top, is backfilled Cement-Screening layer 2 on pipeline top according to design requirement, is completed to pipe
The second layer of line is protected；
Bed course, construction of waterproof layer provide the smooth of waterproof protective layer in 2 top casting concrete bed course 4 of Cement-Screening layer
Face paved surface pours waterproof protective layer on 4 top of concrete cushion, with effective protection waterproof layer；
Design requirement pouring reinforcement concrete plate is pressed on the top of casting concrete plate, waterproof protective layer, is completed to pipeline
Third layer protection；
Backfilling of earthwork, compacting backfill the earthwork on armoured concrete slab top by design requirement and tamp, complete backfilling of earthwork
Work；
Ground ecological recovery restores ground ecosystem, meets urban afforestation requirement.
It is poor to exist in terms of the gradient, original structure shape or underground structure absolute altitude to the high-tension electricity pipeline of different sections
Different time carries out backfill protection to the high-tension electricity pipeline of different sections respectively, and backfill protection structure is selected according to the actual situation
It selects.
For the backfill construction process for further illustrating high-tension electricity pipeline protection shown in FIG. 1, with following embodiment into one
Step illustrates.
Being illustrated in figure 2 in metro station deep basal pit structure construction needs the plane of high-tension electricity pipeline to be protected to illustrate
Figure, Fig. 3 show the longitudinal profile of corresponding position.
According to top board structure form, backfill range point three parts are constructed, specific embodiment is as follows.
First segment is the cross section top board structure sinking section A-A, is illustrated in figure 4 the cross section A-A backfill protection schematic diagram, high
6 lower part of piezoelectric forces pipeline is laid with 100mm thickness fine sand, is backfilled above the structure roof waterproof protective layer to pipeline within the scope of 500mm
3% Cement-Screening, aggregate chips is the above are 200mm thickness C20 concrete cushion 4, and bed course upper berth sets watertight insulation 5, finally in high pressure
500mm thickness reinforced concrete cover plate 3 is poured within the scope of 6 transverse direction 2.5m of power pipeline, is placed on watertight insulation 5.
Second segment is that twice turn over the cross section B-B among beam, is illustrated in figure 5 the cross section B-B backfill protection schematic diagram, high
Be 100mm thickness fine sand below piezoelectric forces pipeline 6, be backfilled to 6 or more 500mm of high-tension electricity pipeline with 3% Cement-Screening, aggregate chips with
Upper is 500mm thickness reinforced concrete cover plate 3.
Third section is the cross section C-C irregular structure, is illustrated in figure 6 the cross section C-C backfill protection schematic diagram, high-voltage electricity
It is 100mm thickness fine sand below solenoid line 6,6 or more 500mm of high-tension electricity pipeline is backfilled to 3% Cement-Screening, in high-tension electricity
500mm thickness reinforced concrete cover plate 3 is performed within the scope of 6 transverse direction 2.5m of pipeline.
In present embodiment, it is laid with sand bedding course 1 in 6 lower part of high-tension electricity pipeline, is effectively conducive to improve returning for pipeline bottom
The compactness of filler, conducive to the bearing capacity for increasing pipeline lower part backfill layer.
It is backfilled to 6 or more 500mm of high-tension electricity pipeline with 3% Cement-Screening again, 2 pairs of pipeline of Cement-Screening layer form one layer
Hard protective layer, the similar original concrete encapsulating of pipeline.
It more than aggregate chips is laid with 200mm concrete cushion 4, bed course upper berth sets watertight insulation 5, and concrete cushion 4 is both water
Mudstone considers 2 screed-coat of layer to be worth doing, and is the lower protective layer of watertight insulation 5, and watertight insulation 5 can evade/reduce underground water pair
The influence of pipeline forms the structure for being similar to pipe culvert.
500mm thickness reinforced concrete cover plate 3 is performed within the scope of 6 transverse direction 2.5m of high-tension electricity pipeline, forms the of pipeline
Three-layer protection carries ground load and ground load is uniformly distributed the pipeline periphery soil body, and reduction/elimination ground load is to pipeline
Adverse effect.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (10)
1. structure is protected in a kind of backfill of deep basal pit top high-voltage power pipeline characterized by comprising sand bedding course, Behavior of Hardened Cement Paste
Consider layer and reinforced concrete cover plate to be worth doing；The lower section of high-tension electricity pipeline is arranged in the sand bedding course, and the Cement-Screening layer is filled in
Above high-tension electricity pipeline in setting range；On Cement-Screening layer, the model of covering high-tension electricity pipeline two sides set distance
In enclosing, pouring reinforcement concrete cover board.
2. structure is protected in a kind of backfill of deep basal pit top high-voltage power pipeline as described in claim 1, which is characterized in that
Successively be laid with concrete cushion and watertight insulation on Cement-Screening layer, reinforced concrete cover plate be placed in watertight insulation it
On.
3. structure is protected in a kind of backfill of deep basal pit top high-voltage power pipeline as claimed in claim 2, which is characterized in that institute
Stating concrete cushion is the C20 concrete for setting thickness.
4. structure is protected in a kind of backfill of deep basal pit top high-voltage power pipeline as claimed in claim 2, which is characterized in that institute
Stating watertight insulation is polymer membranes.
5. structure is protected in a kind of backfill of deep basal pit top high-voltage power pipeline as described in claim 1, which is characterized in that institute
Stating sand bedding course is the fine sand for setting thickness.
6. structure is protected in a kind of backfill of deep basal pit top high-voltage power pipeline as described in claim 1, which is characterized in that institute
The width for stating sand bedding course meets design requirement.
7. structure is protected in a kind of backfill of deep basal pit top high-voltage power pipeline as described in claim 1, which is characterized in that institute
Stating Cement-Screening layer includes 3% Cement-Screening.
8. a kind of backfill guard method of deep basal pit top high-voltage power pipeline characterized by comprising high-tension electricity pipeline into
When row backfill, in the lower section of high-tension electricity pipeline, setting can at least cover the sand bedding course of high-tension electricity pipeline width, in high pressure
In power pipeline bottom to the setting range of top, filling concrete aggregate chips layer；On Cement-Screening layer, covering high-voltage electricity solenoid
In the range of the set distance of line two sides, pouring reinforcement concrete cover board.
9. a kind of backfill guard method of deep basal pit top high-voltage power pipeline as claimed in claim 8, which is characterized in that root
Factually border execution conditions are successively laid with concrete cushion and watertight insulation, reinforced concrete cover plate on Cement-Screening layer
It is placed on watertight insulation.
10. a kind of backfill guard method of deep basal pit top high-voltage power pipeline as claimed in claim 8, which is characterized in that
It is right to the high-tension electricity pipelines of different sections when being had differences in terms of the gradient, original structure shape or underground structure absolute altitude
The high-tension electricity pipeline of different sections carries out backfill protection respectively, and backfill protection structure is selected according to the actual situation.
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| CN201910193813.XA CN109888712A (en) | 2019-03-14 | 2019-03-14 | The backfill protection structure and method of deep basal pit top high-voltage power pipeline |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114439267A (en) * | 2022-02-16 | 2022-05-06 | 浙大城市学院 | Road structure transformed from super-huge independent underground garage and construction method thereof |
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