CN206800453U - Subway open-cut station comprehensive protection system under a kind of strong corrosive environment - Google Patents
Subway open-cut station comprehensive protection system under a kind of strong corrosive environment Download PDFInfo
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- CN206800453U CN206800453U CN201720570861.2U CN201720570861U CN206800453U CN 206800453 U CN206800453 U CN 206800453U CN 201720570861 U CN201720570861 U CN 201720570861U CN 206800453 U CN206800453 U CN 206800453U
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Abstract
It the utility model is related to subway open-cut station comprehensive protection system under a kind of strong corrosive environment.Under strong corrosive environment, it can not meet concrete durability requirement according to existing specification.The utility model is in the reinforced waterproofing layer that full outsourcing is set outside the top plate, bottom plate and side wall at station；It is compacted above the reinforced waterproofing layer of top plate by overburden layer；Plain concrete bed course is set below the reinforced waterproofing layer of bottom plate；It is compacted between station main body foundation pit supporting construction on the outside of the reinforced waterproofing layer of side wall and on the outside of side wall by separation layer.The utility model is on the basis of conventional open-cut station water-proof system, by setting up anticorrosive coat, separation layer, and using modes such as high performance concretes, meet concrete structure durability requirement, it is coastal and landlocked saline soil is regional in China part, have a wide range of applications space；On the basis of open-cut station water-proof system, there is less working procedure easy flexibly, strong operability, increase investment, strong adaptability, safe and reliable.
Description
Technical field
It the utility model is related to subway engineering technical field of structures, and in particular to subway open cut car under a kind of strong corrosive environment
Stand comprehensive protection system.
Background technology
As domestic main cities subway construction is fast-developing, subway trip has become the most important daily traffic in city
One of selection mode, subway construction are also required to adapt to various geological conditions, meanwhile, complicated underground environment is durable to structure of the subway
Property propose acid test.
The design life of subway engineering is 100 years,《Durability design specification》（GB/T50476-
2008) specific requirement is proposed according to the design of the environment category of engineering local environment, environmental activity grade to concrete durability
With Con trolling index.It is but coastal in China part and landlocked saline soil is regional, CL in water and soil-、SO4 2-It is remote Deng corrosive medium content
Environmental rating in supergage, it can not meet concrete durability requirement according to existing specification.
The content of the invention
The purpose of this utility model is to provide subway open-cut station comprehensive protection system under a kind of strong corrosive environment, meets special
Under different geological conditions, underground concrete structure life requirement.
Technical scheme is used by the utility model：
Subway open-cut station comprehensive protection system under a kind of strong corrosive environment, it is characterised in that：
In the reinforced waterproofing layer that full outsourcing is set outside the top plate, bottom plate and side wall at station；
It is compacted above the reinforced waterproofing layer of top plate by overburden layer；
Plain concrete bed course is set below the reinforced waterproofing layer of bottom plate；
It is compacted between station main body foundation pit supporting construction on the outside of the reinforced waterproofing layer of side wall and on the outside of side wall by separation layer.
Top board surface is coated with anticorrosive coat, and anticorrosive coat is between reinforced waterproofing layer and top plate；
The reinforced waterproofing layer surface of top plate is provided with pea gravel concreten protective layer, and pea gravel concreten protective layer is anti-positioned at strengthening
Between water layer and overburden layer.
Bottom plate bottom surface is provided with pea gravel concreten protective layer, pea gravel concreten protective layer be located at bottom plate and reinforced waterproofing layer it
Between.
Side wall surface is coated with anticorrosive coat, and anticorrosive coat is between side wall and reinforced waterproofing layer；
Protection board is provided with outside the reinforced waterproofing layer of side wall, protection board is between reinforced waterproofing layer and separation layer.
The utility model has advantages below：
1st, main anticorrosion containing the impermeable structure+reinforcement anticorrosive coat+reinforced waterproofing layer+separation layer of comprehensive protection system, every
Absciss layer filtering corrosive medium, reinforcement anticorrosive coat, reinforced waterproofing layer are further isolated and resisted corrosive medium and penetrate into concrete structure,
Compact structure is provided using high performance concrete and coated reinforcement, reinforcement structure is isolated by multiple tracks from antiseptic power, be comprehensive
Protection, greatly improves concrete structure resistance to corrosion, meets life requirement.
2nd, working procedure matching subway open-cut station routine engineering method, working procedure is easy flexibly, strong operability, does not increase work
Phase.
3rd, more conventional subway open-cut station, comprehensive protection system mainly sets up anticorrosive coat, using high performance concrete and
Coated reinforcement, increase investment are less.Urban track traffic, railway, municipal underground under the special geologic conditions such as deep-etching are led to
Have wide practical use in the underground concrete structure engineering such as road.
Brief description of the drawings
Fig. 1 is subway open-cut station comprehensive protection system profile of the present utility model.
Fig. 2 is protection system drawing at top plate node in station of the present utility model.
Fig. 3 is protection system drawing at station side wall node of the present utility model.
Fig. 4 is protection system drawing at bottom plate node in station of the present utility model.
In figure, 1- stations main body foundation pit supporting construction, 2- element concrete bed courses, 3- reinforced waterproofing layers, 4- bottom plates, 5- side walls, 6-
Top plate, 7- separation layers, 8- overburden layers, 9- anticorrosive coats, 10- pea gravel concreten protective layers, 11- protection boards.
Embodiment
The utility model is described in detail with reference to embodiment.
Subway open-cut station comprehensive protection system under the strong corrosive environment that the utility model is related to, mainly containing impermeable structure
Anticorrosion+reinforcement anticorrosive coat+reinforced waterproofing layer+separation layer, concrete structure are：
In the reinforced waterproofing layer 3 that full outsourcing is set outside the top plate 6, bottom plate 4 and side wall 5 at station.The reinforced waterproofing layer of top plate 6
3 tops are compacted by overburden layer 8, and the lower section of reinforced waterproofing layer 3 of bottom plate 4 sets plain concrete bed course 2, the outside of reinforced waterproofing layer 3 of side wall 5
It is compacted between the station main body foundation pit supporting construction 1 in the outside of side wall 5 by separation layer 7.
The surface of top plate 6 is coated with anticorrosive coat 9, and anticorrosive coat 9 is between reinforced waterproofing layer 3 and top plate 6.The reinforcement of top plate 6
The surface of waterproof layer 3 is provided with pea gravel concreten protective layer 10, and pea gravel concreten protective layer 10 is located at reinforced waterproofing layer 3 and overburden layer
Between 8.
The bottom surface of bottom plate 4 is provided with pea gravel concreten protective layer 10, and pea gravel concreten protective layer 10 is located at bottom plate 4 and strengthened anti-
Between water layer 3.
The surface of side wall 5 is coated with anticorrosive coat 9, and anticorrosive coat 9 is between side wall 5 and reinforced waterproofing layer 3.The reinforcement of side wall 5
Protection board 11 is provided with outside waterproof layer 3, protection board 11 is between reinforced waterproofing layer 3 and separation layer 7.
The construction method of subway open-cut station comprehensive protection system, comprises the following steps under above-mentioned strong corrosive environment：
Step 1：
Work car station owner's body foundation pit supporting construction 1, excavation pit is to cheating bottom；
Step 2：
The plain concrete bed course 2 of bottom plate 4 is laid, in order to preferably isolate corrosive medium, plain concrete bed course 2 is using 300mm thickness C20 elements
Concrete, lays reinforced waterproofing layer 3 on plain concrete bed course 2, reinforced waterproofing layer 3 using double-deck SBS elastomer modified asphalt waterproof rolls,
Asphaltic base polyester blank prespreading waterproof roll or Macromolecular self-adhesive membrane prespreading waterproof roll, lay on reinforced waterproofing layer 3
50mm thickness C20 pea gravel concreten protective layer 10；
The reinforcing bar of colligation bottom plate 4, outer reinforcement use coated reinforcement, and anticorrosive paint is applied using the HCPE of anti-chlorine salt corrosion
Material, gross thickness are not less than 200 μm, bottom plate 4 are poured using high performance concrete；
Step 3：The reinforcing bar of colligation side wall 5, outer reinforcement use coated reinforcement, side wall are poured using high performance concrete
5；
The concrete outer surface brushing anticorrosive coat 9 of side wall 5, anticorrosive coat 9 use impregnating with silane, and silane uses the second of iso-octyl three
TMOS lotion, dosage are no less than 300g/ ㎡；
Reinforced waterproofing layer 3 is laid in outside, adds protection board 11, protection board 11 uses PE plastic foamboards, with station main body base
Fertile groove between pit supporting construction 1 sets separation layer 7, and separation layer 7 is using the native compaction in layers backfill of high-quality element；
Plate, top side wall in construction bottom side wall, station successively；
Step 4：The reinforcing bar of colligation top plate 6, outer reinforcement use coated reinforcement, top plate are poured using high performance concrete
6；
The concrete outer surface brushing anticorrosive coat 9 of top plate 6, reinforced waterproofing layer 3 and 100g/ ㎡ non-woven fabrics are laid thereon,
70mm thickness C20 pea gravel concreten protective layer 10 is laid on reinforced waterproofing layer 3, top overburden layer 8 is using high-quality element soil layering pressure
Real backfill；
Lay road surface and recover road traffic.
In construction, associated materials requirement and construction process requirement are as follows：
1st, high performance concrete：
Concrete raw material requirement：Strength grade is used preferentially to make for 42.5 grades and 52.5 grades of normal silicate salt cements
With P I type portland cements.Shaft kiln cement must not be used, should be avoided using early cement and sulfuric-resisting strong, the heat of hydration is higher
Salt cement and high sulfate resisting cement.C in cement3A contents preferably control is not more than 1.5% in 6%~12%, f-CaO contents, water
The fineness of mud is preferably less than 350m2/ kg, must not exceed 400m2/kg.The alkali content of cement should be less than 0.6%, and total in concrete
Alkalinity is no more than 3.0kg/m3.The chloride ion content of cement should be less than 0.03%, and the chlorion total content in concrete does not surpass
Cross the 0.05% of binder total amount.
Water-cement ratio and gel material content control：Strength of High Performance Concrete grade preferably uses C35, C40, C45, water-cement ratio
Scope 0.35~0.50,380~480kg/m of binder total amount scope3, mineral admixture doping quantity of fly ash 10%~30%, mill
Mineral fine volume 10%~40%.
Durability key technical index controls：Frost Resistance index DF is not less than 85%, and the coefficient of resistance erosion is not less than
0.95, chloride diffusion coefficient is not more than 4x10-8cm2/ s, anti-carbonation properties are not more than 15mm.
2nd, reinforcing bar coating：
In the concrete side wall and roof and floor contacted with the corrosivity soil body, its outermost layer reinforcing bar uses coated reinforcement, anti-corrosion
Coating uses the HCPE coating of anti-chlorine salt corrosion.It is proposed with the scheme of one side in two bottom two sides or two bottoms one, priming paint, intermediate coat
It should reach 200 μm with the total coating thickness of finish paint.The kg/m of coating dosage per pass 0.2~0.32.Coating is existing if there is thickening
As supporting diluent, addition 10% or so can be added.
Preferably appropriate increase thickness of protection tier in construction, it is proposed that increase by 5 on the basis of code requirement protective layer thickness~
10mm, while strict control thickness of protection tier requirement.
3rd, anticorrosive coat is strengthened：
In the concrete side wall and top plate contacted with the corrosivity soil body, concrete outer surface uses impregnating with silane.Preferentially adopt
It is not small as impregnating with silane material, the content of silane paste isooctyltriethoxysilane with isooctyltriethoxysilane lotion
In 80%；Content of siloxane is not more than 0.3%；Hydrolyzable chloride content not should be greater than a ten thousandth；Flash-point is not less than 70 DEG C.
Spray test should be carried out before dipping silane, trial zone area should be 1~5 ㎡.Absorbed water respectively by code requirement
The reducing effect detection of rate, impregnating with silane depth and chloride uptake.
Isooctyltriethoxysilane lotion dosage：Every square metre of spraying or roller coating one time altogether, dosage is no less than 300g/
㎡。
4th, separation layer：
Preferably select fresh, pollution-free, bad hydraulic permeability cohesive soil, it is impossible to containing peat, mud, rubbish etc., must not use
Sand, miscellaneous fill and completely decomposed, severely-weathered class ground, lime etc..And backfilled using compaction in layers, compacting factor is not less than
0.95。
The utility model by normal concrete in conventional subway open-cut station structure be adjusted to compactness preferably, the heat of hydration compared with
Low high performance concrete, set up coated reinforcement, strengthen the integrated protection measures such as anticorrosive coat, separation layer, not only improve concrete
Structure corrosion resistance, meet structure durability requirement, while match open cut engineering method, easy construction is flexible, improves work efficiency.
Content of the present utility model is not limited to cited by embodiment, and those of ordinary skill in the art are new by reading this practicality
Type specification and any equivalent conversion taken technical solutions of the utility model, are claim institute of the present utility model
Cover.
Claims (4)
- A kind of 1. subway open-cut station comprehensive protection system under strong corrosive environment, it is characterised in that：Top plate in station（6）, bottom plate（4）And side wall（5）The outer reinforced waterproofing layer that full outsourcing is set（3）；Top plate（6）Reinforced waterproofing layer（3）Top is by overburden layer（8）Compacting；Bottom plate（4）Reinforced waterproofing layer（3）Lower section sets plain concrete bed course（2）；Side wall（5）Reinforced waterproofing layer（3）Outside and side wall（5）The station main body foundation pit supporting construction in outside（1）Between by every Absciss layer（7）Compacting.
- 2. subway open-cut station comprehensive protection system under a kind of strong corrosive environment according to claim 1, it is characterised in that：Top plate（6）Surface is coated with anticorrosive coat（9）, anticorrosive coat（9）Positioned at reinforced waterproofing layer（3）With top plate（6）Between；Top plate（6）Reinforced waterproofing layer（3）Surface is provided with pea gravel concreten protective layer（10）, pea gravel concreten protective layer（10） Positioned at reinforced waterproofing layer（3）With overburden layer（8）Between.
- 3. subway open-cut station comprehensive protection system under a kind of strong corrosive environment according to claim 1, it is characterised in that：Bottom plate（4）Bottom surface is provided with pea gravel concreten protective layer（10）, pea gravel concreten protective layer（10）Positioned at bottom plate（4）With add Strong waterproof layer（3）Between.
- 4. subway open-cut station comprehensive protection system under a kind of strong corrosive environment according to claim 1, it is characterised in that：Side wall（5）Surface is coated with anticorrosive coat（9）, anticorrosive coat（9）Positioned at side wall（5）With reinforced waterproofing layer（3）Between；Side wall（5）Reinforced waterproofing layer（3）It is provided with protection board outside（11）, protection board（11）Positioned at reinforced waterproofing layer（3）With every Absciss layer（7）Between.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720570861.2U CN206800453U (en) | 2017-05-22 | 2017-05-22 | Subway open-cut station comprehensive protection system under a kind of strong corrosive environment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720570861.2U CN206800453U (en) | 2017-05-22 | 2017-05-22 | Subway open-cut station comprehensive protection system under a kind of strong corrosive environment |
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| CN206800453U true CN206800453U (en) | 2017-12-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107059924A (en) * | 2017-05-22 | 2017-08-18 | 中铁第勘察设计院集团有限公司 | Subway open-cut station comprehensive protection system and its construction method under strong corrosive environment |
-
2017
- 2017-05-22 CN CN201720570861.2U patent/CN206800453U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107059924A (en) * | 2017-05-22 | 2017-08-18 | 中铁第勘察设计院集团有限公司 | Subway open-cut station comprehensive protection system and its construction method under strong corrosive environment |
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