CN104747204A - Construction technology for foundation slab sliding layer of super-long tunnel - Google Patents
Construction technology for foundation slab sliding layer of super-long tunnel Download PDFInfo
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- CN104747204A CN104747204A CN201510028817.4A CN201510028817A CN104747204A CN 104747204 A CN104747204 A CN 104747204A CN 201510028817 A CN201510028817 A CN 201510028817A CN 104747204 A CN104747204 A CN 104747204A
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- sliding layer
- epoxy resin
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Abstract
The invention relates to the technical field of tunnel construction, in particular to a construction technology for a foundation slab sliding layer of a super-long tunnel. The technology is characterized by comprising the following steps that a, a cushion is cleaned, impurities on the surface of the concrete cushion are removed, the surface of the concrete cushion is guaranteed smooth, firm and dry; b, base coat is painted, wherein epoxy resin base coat is evenly painted on the concrete cushion; c, intermediate coat is painted, wherein epoxy resin intermediate coat is evenly painted on the base coat; d, finishing coat is painted, wherein epoxy resin finishing coat is evenly painted on the intermediate coat. According to the construction technology for the foundation slab sliding layer of the super-long tunnel, the friction force between a foundation slab and the cushion can be lowered effectively, foundation slab concrete is made to be subject to stress and deforms, relative free moving can be generated, and therefore cracks can be effectively prevented from being generated; the adhesive force of an epoxy resin sliding layer is high, normal temperature operation can be achieved, construction is convenient, and construction quality is guaranteed; in addition, the epoxy resin sliding layer has the advantages of being dense, waterproof, resistant to leakage, high in intensity and the like, and is appropriate in price and capable of effectively lowering engineering cost.
Description
Technical field
The present invention relates to technical field of tunnel construction, relate to a kind of Super Long Tunnel sole plate sliding layer construction technology more specifically.
Background technology
The large area concrete waterproof of Super Long Tunnel, demand of anti-crack are high.In order to reduce the external constraint in tunnel, reduce the risk that distress in concrete occurs, sliding layer together with need increasing between sole plate with bed course, to reduce the frictional force between sole plate and bed course, sole plate concrete stress deformation can be produced relatively move freely, thus effectively suppress the generation in crack.At present, the material that sliding layer is selected is generally layer of sand, sealed polyethylene plastic, cement, lime fly ash, particulate bituminous mixture etc.Adopt " layer of sand " as sliding layer, have higher requirements to the fineness modulus of sand, cleanliness factor, the particle of sand and cleannes directly affect the sliding capability of sliding layer.Adopt " sealed polyethylene plastic " as sliding layer, its tearing toughness, water resistance etc. are all poor, cracky, wear no resistance, and construction technology is loaded down with trivial details, efficiency of construction is low, and it is smooth, wrinkle resistant to be difficult to ensure card, and construction quality is difficult to ensure.Adopt " cement " as sliding layer, when surrounding enviroment have water, water met by the cement be mixed with in sliding layer will there is hydration reaction at short notice, and cause sliding layer initial stage friction factor comparatively large, later stage friction factor increasess slowly, and is unfavorable for structure stress.Adopt " particulate bituminous mixture " as sliding layer, because particulate asphalt from asphalt mixture content is less, and ageing of asphalt is comparatively serious, and friction factor growth trend is in time not obvious; Particulate bituminous mixture is expensive simultaneously, and construction cost is high.Adopt particulate bituminous mixture as sliding layer, require also strict to the grating of compound.Adopt " lime fly ash soil " as sliding layer, as water content is little, then when laying, dust is large, does not meet the concept of environmental protection; As water content is large, then can produce conglomeration when laying, lay uneven.
Accompanying drawing explanation
Fig. 1 is sliding layer structural representation.
Fig. 2 is experimental facilities schematic diagram.
Summary of the invention
The present invention, for overcoming at least one defect (deficiency) described in above-mentioned prior art, provides a kind of Super Long Tunnel sole plate sliding layer construction technology.
For solving the problems of the technologies described above, technical scheme of the present invention is as follows:
A kind of Super Long Tunnel sole plate sliding layer construction technology, is characterized in that comprising following steps: a. clears up bed course: removed by the impurity on concrete cushion surface and ensure its surfacing, firm, dry; B. priming paint is smeared: by epoxy resin primer uniform application on concrete cushion; C. middle paint is smeared: uniform application will be painted in epoxy resin on priming paint; D. smear finish paint: by epoxy resin finish uniform application in paint.
Compared with prior art, the beneficial effect of technical solution of the present invention is:
The present invention uses epoxy resin as the sliding layer of tunnel basis base plate, can effectively reduce frictional force between base plate and bed course, sole plate concrete stress deformation can be produced and relatively move freely, thus restrained effectively the generation in crack; And epoxy resin sliding layer strong adhesion, can normal-temperature operation, easy construction ensure construction quality; Epoxy resin sliding layer not only has closely knit, waterproof, anti-leakage, intensity high in addition, and moderate, effectively can reduce engineering cost.
Further, for ensure bed course cleaning performance and ensure priming paint smear quality, the removing technique of described step a is: first use hand grinding tool sander that the impurity on concrete cushion (1) surface is polished and cleaned, with industrial dust collector by completely clean for dust clean, the moisture content on the surface of concrete cushion (1) is made to be less than 8%.
Further, for ease of primer, the application process of described step b is: by epoxy resin primer A, B two kinds material by after the ratio uniform mixing of 2:1, with cylinder uniform application on concrete cushion (1), smearing thickness is 0.1mm ~ 0.15mm, and priming paint use amount is 0.1kg/m
2~ 0.15kg/m
2.
Further, for avoiding primer defects, after the priming paint (2) in described step b has been smeared, inspect the situation of primer, the priming paint as some position has been absorbed by concrete cushion, then repeat coating, guarantee that the thickness of priming paint is 0.1mm ~ 0.15mm.
Further, quality is smeared for what paint in guarantee, application process in described step c is: add after quartz sand fully stirs by painting the ratio uniform mixing of A, B two kinds material by 5:1 in epoxy resin, after temperature more than 15 keeps 8-12 hour, with trowel by middle paint uniform application on priming paint, the thickness smeared is 1mm ~ 2mm, and middle paint use amount is 1kg/m
2~ 2kg/m
2.
Further, for avoiding middle paint defect, after middle paint intensity is up to standard, uses the gap, sand holes, tool marks etc. of enamelled coating in batch cutter cleaning, makes middle enamelled coating complete and smooth.
Further, smear quality for what ensure finish paint, the application process of described steps d is: by epoxy resin finish A, B two kinds material by after the ratio uniform mixing of 5:1, employing sawtooth trowel uniform application is on middle paint, the thickness smeared is 0.9mm ~ 1.1mm, and finish paint use amount is 0.9kg/m
2~ 1.1kg/m
2.
Detailed description of the invention
Specific embodiment:
As shown in Figure 1, a kind of Super Long Tunnel sole plate sliding layer construction technology, comprises following steps:
A. bed course 1 is cleared up:
Polish with the impurity of hand grinding tool sander by concrete cushion 1 surface and clean, with industrial dust collector by completely clean for dust clean, making the moisture content on the surface of concrete cushion 1 be less than 8%, smooth, firm, dry.B. priming paint 2 is smeared:
After epoxy resin primer A, B two kinds material being pressed the ratio uniform mixing of 2:1, with cylinder uniform application on concrete cushion 1, thickness is 0.1mm ~ 0.15mm, and priming paint use amount is 0.1kg/m
2~ 0.15kg/m
2, inspect the situation of primer, the priming paint as some position is absorbed by blinding concrete, then repeat coating, guarantee that the thickness of priming paint is 0.1mm ~ 0.15mm.
C. middle paint 3 is smeared:
Add after quartz sand fully stirs by painting the ratio uniform mixing of A, B two kinds material by 5:1 in epoxy resin, after temperature more than 15 DEG C keeps 8-12 hour, with trowel uniform application on priming paint 2, the thickness smeared is 1mm ~ 2mm, and middle paint use amount is about 1kg/m
2~ 2kg/m
2, after intensity be up to standard, use batch gap, sand holes, tool marks etc. of cutter cleaning bed course, make bed course complete and smooth.
D. finish paint 4 is smeared:
By epoxy resin Self-leveling finish paint A, B two kinds material by being applied on middle paint 3 with sawtooth trowel after the ratio uniform mixing of 5:1, the thickness smeared is 0.9mm ~ 1.1mm, and finish paint use amount is about 0.9kg/m
2~ 1.1kg/m
2.
Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.All any amendments done within the spirit and principles in the present invention, equivalent to replace and improvement etc., within the protection domain that all should be included in the claims in the present invention.
Experimental data:
Because subterranean tunnel baseplate width is 6.9m ~ 10.7m, the space requirement of full scale test is too high, so experimentally room condition is tested with 1:3 ~ 1:5 reduce in scale, i.e. and about sample dimensions 2m.
In addition, because on tunnel roof, earthing reaches 5 ~ 8m, top board base plate is all thicker, between base plate and bed course, actual compressive stress is larger, the heap weight of larger volume may be needed as realized compressive stress simulation by preloading, and compressive stress adjustment inconvenience, so this experiment adopts hydraulic jack to load.
Adopt the testing program of the two slide plane of three test blocks, namely fix upper and lower test block, test block in the middle of promoting.Scheme experimental rig as shown in Figure 2.
The experimental data of the fricton-tight layer of base plate
Base plate has the experimental data of sliding layer
Through above l-G simulation test, draw the coefficient of sliding friction smeared between sliding layer bottom plate in front and bed course, by the contrast of two groups of data, demonstrate epoxy resin sliding layer and there is good slip effect.
Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.All any amendments done within the spirit and principles in the present invention, equivalent to replace and improvement etc., within the protection domain that all should be included in the claims in the present invention.
Claims (7)
1. a Super Long Tunnel sole plate sliding layer construction technology, is characterized in that comprising following steps:
A. bed course (1) is cleared up: removed by the impurity on concrete cushion (1) surface and ensure its surfacing, firm, dry;
B. priming paint (2) is smeared: by epoxy resin primer (2) uniform application on described concrete cushion (1);
C. middle paint (3) is smeared: (3) uniform application will be painted in epoxy resin on priming paint (2);
D. finish paint (4) is smeared: by epoxy resin finish (4) uniform application on middle paint (3).
2. Super Long Tunnel sole plate sliding layer construction technology according to claim 1, it is characterized in that, the removing technique of described step a is: first use hand grinding tool sander that the impurity on concrete cushion (1) surface is polished and cleaned, with industrial dust collector by completely clean for dust clean, the moisture content on the surface of concrete cushion (1) is made to be less than 8%.
3. Super Long Tunnel sole plate sliding layer construction technology according to claim 2, it is characterized in that, the application process of described step b is: by epoxy resin primer A, B two kinds material by after the ratio uniform mixing of 2:1, with cylinder uniform application on concrete cushion (1), smearing thickness is 0.1mm ~ 0.15mm, and priming paint use amount is 0.1kg/m
2~ 0.15kg/m
2.
4. Super Long Tunnel sole plate sliding layer construction technology according to claim 3, it is characterized in that, after priming paint (2) in described step b has been smeared, inspect the situation of primer, priming paint as some position is absorbed by concrete cushion, then repeat coating, guarantee that the thickness of priming paint is 0.1mm ~ 0.15mm.
5. the Super Long Tunnel sole plate sliding layer construction technology according to claim 3 or 4, it is characterized in that, application process in described step c is: add after quartz sand fully stirs by painting the ratio uniform mixing of A, B two kinds material by 5:1 in epoxy resin, after temperature more than 15 keeps 8-12 hour, with trowel by middle paint uniform application on priming paint, the thickness smeared is 1mm ~ 2mm, and middle paint use amount is 1kg/m
2~ 2kg/m
2.
6. Super Long Tunnel sole plate sliding layer construction technology according to claim 5, is characterized in that, uses the gap, sand holes, tool marks etc. of enamelled coating in batch cutter cleaning, make middle enamelled coating complete and smooth after middle paint intensity is up to standard.
7. Super Long Tunnel sole plate sliding layer construction technology according to claim 6, it is characterized in that, the application process of described steps d is: by epoxy resin finish A, B two kinds material by after the ratio uniform mixing of 5:1, adopt sawtooth trowel uniform application on middle paint, the thickness smeared is 0.9mm ~ 0.1mm, and finish paint use amount is 0.9kg/m
2~ 1.1kg/m
2.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510028817.4A CN104747204A (en) | 2015-01-20 | 2015-01-20 | Construction technology for foundation slab sliding layer of super-long tunnel |
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|---|---|---|---|
| CN201510028817.4A CN104747204A (en) | 2015-01-20 | 2015-01-20 | Construction technology for foundation slab sliding layer of super-long tunnel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107151959A (en) * | 2017-06-19 | 2017-09-12 | 沈阳美星科技发展有限公司 | A kind of drill school place construction Craft |
| CN107165012A (en) * | 2017-06-15 | 2017-09-15 | 上海建工四建集团有限公司 | The road structure and its construction method of a kind of tunnel upper |
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2015
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| CN2778868Y (en) * | 2005-04-07 | 2006-05-10 | 中国矿业大学 | Subside area distortion-resistant road surface structure. |
| CN1804239A (en) * | 2006-01-16 | 2006-07-19 | 中国矿业大学 | Construction method for deformation resistant building foundation in subsidence area |
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| CN107165012A (en) * | 2017-06-15 | 2017-09-15 | 上海建工四建集团有限公司 | The road structure and its construction method of a kind of tunnel upper |
| CN107151959A (en) * | 2017-06-19 | 2017-09-12 | 沈阳美星科技发展有限公司 | A kind of drill school place construction Craft |
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