CN201447663U - Bridge deck laying structure capable of reducing the disadvantaged temperature effect of main bridge structures of bridges - Google Patents
Bridge deck laying structure capable of reducing the disadvantaged temperature effect of main bridge structures of bridges Download PDFInfo
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- CN201447663U CN201447663U CN2009200449655U CN200920044965U CN201447663U CN 201447663 U CN201447663 U CN 201447663U CN 2009200449655 U CN2009200449655 U CN 2009200449655U CN 200920044965 U CN200920044965 U CN 200920044965U CN 201447663 U CN201447663 U CN 201447663U
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Abstract
A bridge deck laying structure capable of reducing the disadvantaged temperature effect of main bridge structures of bridges comprises a waterproof layer (2) and a concrete laying layer (3) which are orderly laid on a main bridge structure (1) of a bridge, and is characterized in that an insulation layer (4) is arranged between the waterproof layer (2) and the main bridge structure (1) of a bridge and/or the waterproof layer (2) and the concrete laying layer (3). The thickness of the insulation layer (4) is 1-100 mm, and the thermal conductivity factor is no less than 0.8W/m.k. The bridge deck laying structure can reduce the gradient temperature load of the main bridge structure of a bridge, reduces the costs of building and maintaining bridges, and prolongs the service life of the bridge structure.
Description
Technical field
The utility model relates to a kind of bridge construction, especially a kind of deck installation structure that reduces main beam structure gradient temperature effect, specifically a kind of deck installation structure that reduces the unfavorable gradient temperature effect of bridge main beam structure.
Background technology
Since the sixties, all found to cause the accident of the serious rhegma of concrete bridge girder construction both at home and abroad owing to thermal stresses.For example, the damage of several thick web box girders of Germany, wherein two bridge blocks almost cave in, and find in the inspection to German Jagst bridge web box girder, be open to traffic to find serious crack on the 5th year, through the estimated temperature tensile stress up to 2.6MPa; The U.S. changes Champigny Box Girder Bridge end reaction observes, fluctuation reaches 26% in one day, be equivalent to the case back of this counter-force changing value, the equivalent temperature difference of backplate surface is 10 ℃, only the maximum flange stress that is caused by this temperature difference just can reach 3.92MPa; The prestressed concrete box girder of a new markets viaduct of New Zealand, the temperature difference that produces because of sunshine causes this bridge that serious rhegma takes place, the expensive reparation of having to.Domestic, the crack has also all taken place in the clear bridge of tin, Tong Hui river continuous box girder, Jiujiang Bridge over Yangtse River access bridge case beam, Lijiang River two bridge case beams or the like, and thermal (temperature difference) stress is considered insufficient substantial connection that has in the appearance in these cracks and the design.Engineering practice shows, must pay attention to the analysis of temperature effect and adverse effect thereof.
The thermal (temperature difference) stress of bridge construction is done many research work both at home and abroad, carried out a series of field trial observation and theoretical research.Along with the progress of experimental study work, Chinese scholars begins to recognize along the distribution of the linear property of concrete structure temperature inside distribution right and wrong.In the concrete continuous bridge, thermal stresses can reach even exceed life-load stress, is considered to concrete beam bridge and produces one of the major reason in crack.Engineering design and structural analysis for the ease of bridge, on basis to the analysis of bridge actual observation, states such as the U.S., Japan, Britain, New Zealand and China traffic department are in bridge design standard clause, the Temperature Distribution that bridge construction is acted on lower edge bridge construction girder section height at sunshine has proposed computation schema separately, and all characterizes the nonlinear Distribution condition of this temperature with gradient temperature.
Solar radiation, hard pitch concrete speading (up to 150 ℃) or there's a sudden fall in temperature causes that the bridge construction girder is inner and produce vertical gradient temperature, and then produce disadvantageous thermal stresses, particularly be prone to the cracking disease, influence the durability of bridge construction for concrete-bridge.For this reason, America and Europe and Bridges in Our Country design specifications are all considered gradient temperature as the design load of bridge construction in design reference period.A large amount of calculating according to the Bridges in Our Country design specifications show, the gradient temperature load near life-load stress, even surpasses the stress that mobile load produced to stress that bridge construction produced, becomes one of primary load of control design.
At present engineering circle is handled the principle of the vertical gradient temperature of bridge construction and is: it is considered as design load, take measures to bear the adverse effect that it brings from structure self angle is passive.Such as strengthening bridge construction girder section size, increasing steel bar stress consumption etc., this has just increased construction cost widely, and because the effect repeatedly of altitude temperature difference effect, still can cause the main beam structure cracking, reduction of service life, increase the maintenance operation cost, this problem does not still have better solution at present.
Summary of the invention
The purpose of this utility model is to cause the construction cost increase at generally gradient temperature being designed the bridge main beam structure as design load in the existing bridge design and can't fundamentally solve the problem that unfavorable gradient temperature effect is brought, design a kind of deck installation structure that reduces the unfavorable gradient temperature effect of bridge main beam structure, be subjected to the stress that bridge floor conducts heat to be influenced and produce to reduce the bridge main beam structure as much as possible.
One of the technical solution of the utility model is:
A kind of deck installation structure that reduces disadvantageous temperature effect on main girder structure of bridge, comprise the waterproofing course 2 and the concrete pavement layer 3 of mating formation successively on bridge main beam structure 1, it is characterized in that being provided with insulating layer 4 between waterproofing course 2 and the bridge main beam structure 1 and/or between waterproofing course 2 and the concrete pavement layer 3, the thickness of described insulating layer 4 is 1-100mm, and coefficient of thermal conductivity is not more than 0.8W/mk.
Be mixed with the heat-barrier material of forming insulating layer 4 in described concrete pavement layer 3 or the waterproofing course 2.
Described insulating layer 4 is made by fibrous thermal insulation material, cellular thermal insulation material or stratiform thermal insulation material; Described fibrous thermal insulation material comprises glass wool, rock mineral wool, aluminium silicate wool and goods thereof, and is one or more combination in the fibrous plate made of raw material with straw, disregard message stationery organic fiber; Described cellular thermal insulation material comprises one or more the combination in expanded perlite, expanded vermiculite, microporous silicate, litaflex, foam glass, gas concrete, foamed plastics, haydite concrete or the foam concrete; Described stratiform thermal insulation material comprises aluminium foil, metal or nonmetal coated glass and is one or more combination in the plated film goods of base material with the fabric.
Two of the technical solution of the utility model is:
A kind of deck installation structure that reduces disadvantageous temperature effect on main girder structure of bridge comprises concrete leveling layer 5, waterproofing course 2 and the asphalt concrete pavement layer 6 of mating formation successively on bridge main beam structure 1, it is characterized in that:
(a) between asphalt concrete pavement layer 6 and waterproofing course 2;
(b) between waterproofing course 2 and concrete leveling layer 5;
(c) between bridge main beam structure 1 and concrete leveling layer 5;
Have at least one to be provided with insulating layer 4 in above-mentioned (a) and (b), (c), the thickness of described insulating layer 4 is 1～100mm, and coefficient of thermal conductivity is not more than 0.8W/mk.
Have at least one to be mixed with the heat-barrier material of forming insulating layer 4 among described asphalt concrete pavement layer 6, waterproofing course 2 and concrete leveling layer 5 threes.
Described insulating layer 4 is made by fibrous thermal insulation material, cellular thermal insulation material or stratiform thermal insulation material; Described fibrous thermal insulation material comprises glass wool, rock mineral wool, aluminium silicate wool and goods thereof, and is one or more combination in the fibrous plate made of raw material with straw, disregard message stationery organic fiber; Described cellular thermal insulation material comprises one or more the combination in expanded perlite, expanded vermiculite, microporous silicate, litaflex, foam glass, gas concrete, foamed plastics, haydite concrete or the foam concrete; Described stratiform thermal insulation material comprises aluminium foil, metal or nonmetal coated glass and is one or more combination in the plated film goods of base material with the fabric.
The beneficial effects of the utility model:
The utility model is applied to insulating layer in the deck installation structure first audaciously, and gone out relation between the high gradient temperature in thickness, coefficient of thermal conductivity and bridge deck surface of insulating layer through a large amount of Test Summaries, drawn the pavement thickness of conventional thermal insulation material.Evidence is by increasing insulating layer in the deck paving process, can effectively stop importing into or the outflow of internal heat (as solar radiation, there's a sudden fall in temperature and hard pitch concrete speading etc.) of outside heat, keep the ability of bridge construction beam body temperature degree along vertical stability, perhaps produce as far as possible little vertical gradient temperature, reduce the stress fluctuation that the bridge main beam structure causes because of variations in temperature.
The utility model is compared with the bridge now commonly used system of mating formation except effectively reducing the vertical gradient temperature of bridge construction girder, also has following advantage:
(1) bridge construction solar radiation, there's a sudden fall in temperature and situation such as hard pitch concrete speading under, the utility model can make bridge construction beam body temperature degree along the stable ability of vertical maintenance, perhaps produces as far as possible little vertical gradient temperature;
(2) reduction of the vertical gradient temperature of bridge construction can effectively improve the force-bearing situation of bridge construction;
1. reducing of gradient temperature load, and then bring the bridge construction sectional dimension to reduce reduction with material usage, corresponding the reducing of beam body deadweight, the design load of bridge substructure also reduces synchronously.Thereby reduce the construction cost of bridge significantly.
2. a large amount of theory analysises and experiment show that after in the bridge deck pavement insulating layer being set, by adjusting insulating layer material thermal conductivity and thickness thereof, the gradient temperature peak value of bridge deck end face can descend 30%～70%.This shows, adopt after the deck paving thermal insulation system in the utility model, will provide a kind of effective means and method of improving unfavorable thermal stresses, finally produce considerable society and economic benefit to the new bridge structure design with at the maintenance and renovation of using as a servant bridge.
3. the utility model not only can be used for also can be used in the bridge design constructions such as overhead road of city, speedway, pedestrian overcrossing in cross a river, river, the design and construction of sea-bridge beam, and economic benefit is fairly obvious.Promptly both can be used for highway bridge construction, also can be used in the municipal bridge construction.
4, below the part measured data of insulating layer when adopting different-thickness and material (at subjects, continuous 1 year carry out tracking observation), the high gradient temperature in the bridge deck surface of λ in the table=1.6 and λ=when provision for thermal insulation is not adopted in 1.0 expressions.
When (1) bridge floor adopts the thick concrete pavement of 5cm, install the high gradient temperature of isolation layer back axle panel surface additional.
(2) bridge floor adopts the 10cm concrete pavement, adds the high gradient temperature of heat-barrier material back axle panel surface in waterproofing course
(3) bridge floor adopts concrete pavement, adds the high gradient temperature of heat-barrier material back axle panel surface in concrete pavement layer
(4) bridge floor adopts the 5cm asphalt concrete pavement, adds the high gradient temperature of heat-barrier material back axle panel surface in waterproofing course
When (6) bridge floor adopts the thick asphalt concrete pavement of 5cm, in the concrete leveling layer, add the high gradient temperature of heat-barrier material back axle panel surface
(5) bridge floor adopts asphalt concrete pavement, adds the high gradient temperature of heat-barrier material back axle panel surface in bituminous concrete
Description of drawings
Fig. 1 is one of bridge construction schematic diagram of the present utility model.
Fig. 2 is two of a bridge construction schematic diagram of the present utility model.
Fig. 3 is three of a bridge construction schematic diagram of the present utility model.
Fig. 4 is four of a bridge construction schematic diagram of the present utility model.
Fig. 5 is five of a bridge construction schematic diagram of the present utility model.
Fig. 6 is six of a bridge construction schematic diagram of the present utility model.
Fig. 7 is seven of a bridge construction schematic diagram of the present utility model.
Fig. 8 is eight of a bridge construction schematic diagram of the present utility model.
Fig. 9 is nine of a bridge construction schematic diagram of the present utility model.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further described.
Embodiment one.
As shown in Figure 2.
A kind of deck installation structure that reduces disadvantageous temperature effect on main girder structure of bridge, comprise the waterproofing course 2 and the concrete pavement layer 3 of mating formation successively on concrete-bridge main beam structure 1, between waterproofing course 2 and the bridge main beam structure 1 and between waterproofing course 2 and the concrete pavement layer 3 simultaneously or be provided with insulating layer 4 separately, the thickness of described insulating layer 4 is 1～100mm, and coefficient of thermal conductivity is not more than 0.8W/mk.
During concrete enforcement, in order to improve effect of heat insulation, also can in concrete pavement layer 3 or waterproofing course 2, mix the heat-barrier material of forming insulating layer 4, shown in Fig. 1,3, the amount of mixing can be less than the amount of above-mentioned insulating layer 4 material therefors, can carry out admixture with reference to the amount of all spreading the minimum insulating layer thickness of back formation.
Insulating layer 4 can be made by fibrous thermal insulation material, cellular thermal insulation material or stratiform thermal insulation material; Described fibrous thermal insulation material comprises glass wool, rock mineral wool, aluminium silicate wool and goods thereof, and is one or more combination in the fibrous plate made of raw material with straw, disregard message stationery organic fiber; Described cellular thermal insulation material comprises one or more the combination in expanded perlite, expanded vermiculite, microporous silicate, litaflex, foam glass, gas concrete, foamed plastics, haydite concrete or the foam concrete; Described stratiform thermal insulation material comprises aluminium foil, metal or nonmetal coated glass and is one or more combination in the plated film goods of base material with the fabric.
Embodiment two.
As shown in Figure 5.
A kind of deck installation structure that reduces disadvantageous temperature effect on main girder structure of bridge comprises concrete leveling layer 5, waterproofing course 2 and the asphalt concrete pavement layer 6 of mating formation successively on concrete-bridge main beam structure 1, wherein:
(a) between asphalt concrete pavement layer 6 and waterproofing course 2;
(b) between waterproofing course 2 and concrete leveling layer 5;
(c) between bridge main beam structure 1 and concrete leveling layer 5;
Have at least one to be provided with insulating layer 4 in above-mentioned (a) and (b), (c), the thickness of described insulating layer 4 is 1-100mm, and coefficient of thermal conductivity is not more than 0.8W/mk.
Same as above the same, during concrete enforcement in order to improve effect of heat insulation, also can described asphalt concrete pavement layer 6, have at least one to be mixed with the heat-barrier material of forming insulating layer 4 among waterproofing course 2 and concrete leveling layer 5 threes, shown in Fig. 4,6,7, the amount of mixing can be less than the amount of above-mentioned insulating layer 4 material therefors, can carry out admixture with reference to the amount of all spreading the minimum insulating layer thickness of back formation.
Embodiment three.
As shown in Figure 8.
A kind of deck installation structure that reduces disadvantageous temperature effect on main girder structure of bridge, comprise the waterproofing course 2 and the asphalt concrete pavement layer 3 of mating formation successively on steel bridge main beam structure 1, between waterproofing course 2 and bridge steel beam main beam structure 1 and/or be provided with insulating layer 4 between waterproofing course 2 and the asphalt concrete pavement layer 3, the thickness of described insulating layer 4 is 1～100mm, and coefficient of thermal conductivity is not more than 0.8W/mk.
During concrete enforcement, in order to improve effect of heat insulation, also can in asphalt concrete pavement layer 3 or waterproofing course 2, mix 12 (as shown in Figure 9) of heat-barrier material formation water-proof thermal-insulation layer of forming insulating layer 4, the amount of mixing can be less than the amount of above-mentioned insulating layer 4 material therefors, can carry out admixture with reference to the amount of all spreading the minimum insulating layer thickness of back formation.
Insulating layer 4 can be made by fibrous thermal insulation material, cellular thermal insulation material or stratiform thermal insulation material; Described fibrous thermal insulation material comprises glass wool, rock mineral wool, aluminium silicate wool and goods thereof, and is one or more combination in the fibrous plate made of raw material with straw, disregard message stationery organic fiber; Described cellular thermal insulation material comprises one or more the combination in expanded perlite, expanded vermiculite, microporous silicate, litaflex, foam glass, gas concrete, foamed plastics, haydite concrete or the foam concrete; Described stratiform thermal insulation material comprises aluminium foil, metal or nonmetal coated glass and is one or more combination in the plated film goods of base material with the fabric.
Operating principle of the present utility model is:
As everyone knows, the basic mode of heat transfer mainly contains heat conduction, convection current and heat radiation.The size of the material capacity of heat transmission is relevant with coefficient of thermal conductivity, and its numerical value is big more, and the capacity of heat transmission is strong more; The size of coefficient of thermal conductivity depends primarily on the The Nomenclature Composition and Structure of Complexes of heat transfer medium, and is also relevant with the size of temperature, humidity, pressure, apparent density, hole and feature, direction of heat flow simultaneously.In the actual diabatic process of material, simple heat conduction, convection current, heat radiation are often uncommon, and generally, the three can exist simultaneously, and can change mutually.
According to the difference of heat-blocking action mechanism, can be divided into isolation-type, reflection-type and radial pattern 3 classes.Wanting thermal insulation in a word, is exactly the transmission of impedance hot-fluid to greatest extent.Therefore, the employed material of isolation layer of the present utility model must have less coefficient of thermal conductivity, the coefficient of heat transfer and radiation heat transfer coefficient, material is not absorbed water and the moisture absorption, have performances such as certain mechanical strength and heat resisting temperature, chemical stability, durability, satisfy every mechanical index of bridge construction material.
Therefore, the thermal insulation material that isolation layer of the present utility model adopted is by the chemical group composition: inorganic thermal insulation material, organic thermal insulation materials, composite material three major types are arranged; By the form branch: fibrous, porous (micropore, bubble) shape, shot shape, stratiform etc. are arranged.Treasure the raising of the energy, protection environmental consciousness along with people, adiabatic, environmental friendly material emerges in an endless stream, now Chang Yong novel thermal insulation material has: fibrous thermal insulation material, and for example: it is the fibrous plate that raw material is made that glass wool, rock mineral wool, aluminium silicate wool and goods thereof reach with organic fibers such as straw, disregard message paper; The cellular thermal insulation material, for example: expanded perlite, expanded vermiculite, microporous silicate, litaflex, foam glass, gas concrete, foamed plastics class (polyurethane, polystyrene, polyvinyl chloride, polyethylene, phenolic aldehyde, urea-formaldehyde foamed plastics etc.); The stratiform thermal insulation material, for example: it is the plated film goods of base material that aluminium foil, metal or nonmetal coated glass reach with the fabric.In addition to the above, also have the energy-conserving and environment-protective performance of many thermal insulation materials also to be enhanced gradually, as: composite board, glass, plastics etc.
Bridge floor is mated formation and is adopted ordinary concrete and bituminous concrete mostly.The coefficient of thermal conductivity of portland cement concrete is between 1.5W/mk～3.3W/mk, and the coefficient of thermal conductivity of conventional bituminous concrete is between 0.8W/mk～1.8W/mk.The utility model recommends the heat-barrier material coefficient of thermal conductivity of employing as follows:
1. lightweight aggregate haydite concrete coefficient of thermal conductivity: (0.2～0.75) W/mk;
2. hard polyurethane foams coefficient of thermal conductivity: 0.022W/mk～0.027W/mk;
3. foam concrete coefficient of thermal conductivity: 0.087W/mk～0.3W/mk;
4. flyash in great mixed amount water-proof thermal insulation material coefficient of thermal conductivity :≤0.103W/mk;
5. cement polystyrene board heat preserving and insulating material coefficient of thermal conductivity: 0.05W/mk～0.09W/mk;
6. gas concrete coefficient of thermal conductivity: 0.09W/mk～0.22W/mk;
7. cement pearl rock product coefficient of thermal conductivity: 0.14W/mk～0.17W/mk;
8. flyash-haydite concrete coefficient of thermal conductivity: about 0.3～0.65W/mk;
9. the thermal insulation coating coefficient of thermal conductivity under the normal temperature: about 0.03～0.04W/mk.
10. compare with conventional bridge deck pavement material, after adding above-mentioned heat-barrier material, the coefficient of thermal conductivity of whole bridge floor will reduce greatly, after one or more layers insulating layer is set in bridge deck pavement, the bridge main beam structure can effectively be intercepted with the exchange heat in the external world, its vertical gradient temperature peak value can reduce 30%-70%, the construction investment total value can reduce 5%～10%, direct economic benefit is very remarkable. and the theoretical foundation of Here it is the utility model can reduce bridge main beam structure gradient temperature load, can reduce the construction cost and the maintenance cost of bridge on this basis.
Therefore, setting up insulating layer or add simultaneously the thermal insulation material in the bridge pavement process in pavement material is that creativeness to traditional design theory and job specfication breaks through, its economic implications and benefit are fairly obvious, will produce far-reaching influence to the communication of China.
In addition, both can after making it to have tangible heat-blocking action, modification directly use by concrete is carried out during concrete enforcement as bridge deck pavement material, at this moment, coefficient of thermal conductivity is at λ≤0.8W/mk, strength grade should not be lower than C40, workability should satisfy bridge design, job specfication to concrete every requirement, thickness 〉=5cm.
When adopting other heat-barrier materials, should satisfy following requirement as insulating layer:
1. insulating layer should have favorable durability, should be arranged, tensile strength: 〉=2.5MPa the life-span (about 15 years) that is not less than bridge floor asphalt mixture surfacing or concrete pavement layer service life at least;
2. in ambient conditions-15 ℃～90 ℃ scope, still can satisfy the 1. requirement of bar.Simultaneously, pave after about 150 ℃ of the temperature standing bitumen layer, do not influence its normal function of use and durability.Bituminous concrete that insulating layer is in contact with it or concrete should have blending, adhesion stress between the two is not less than the adhesion stress between asphalt concrete pavement layer (or concrete pavement layer) and the girder, inter-layer shearing strength is at 25 ℃ of time 〉=1.5MPa, at 35 ℃ of time 〉=1.0MPa;
3. insulating layer has good closely connected property on coarse bridge deck, must not accompany air layer after the bonding;
4. the insulating layer construction should be convenient to operation, and workability, drying time, mechanical performance, mechanical index, weatherability etc. all should meet bridge design and job specfication standard, satisfy the normal instructions for use of bridge.
Paving structure of the present utility model can be expressed as with method:
A kind of method that reduces disadvantageous temperature effect on main girder structure of bridge, it is realized one of at least in the following manner:
(1) in the waterproof concrete layer on surface, adds the thermal insulation material, have the thermal insulation waterproof concrete layer 7 of mating formation so that form at bridge main beam structure 1 end face; As shown in Figure 1.
(2) insulating layer 4 that one deck is made up of pressure-resistant material of mating formation between bridge main beam structure 1 and waterproofing course 2 is so that reduce or block the transmission of the heat of surperficial concrete pavement layer to bridge main beam structure 1; As shown in Figure 2.
(3) in the waterproofing course between bridge main beam structure 1 and concrete pavement layer 3, add the thermal insulation material, so that the water-proof thermal-insulation layer 8 that one of formation can reduce or intercept heat is transmitted between bridge main beam structure and concrete pavement layer; As shown in Figure 3.
(4) in the waterproof concrete leveling layer between asphalt concrete pavement layer 6 and bridge main structure 1, add the thermal insulation material and form thermal insulation waterproof concrete leveling layer 9, the interchange of heat between blocking-up and minimizing asphalt concrete pavement layer 6 and the bridge main structure 1; As shown in Figure 4.
(5) between waterproofing course 2 and concrete leveling layer 5, increase shop one deck insulating layer 4, reduce or block heat transmission between surperficial asphalt concrete pavement layer 6 and the concrete leveling layer 5; As shown in Figure 5.
(6) in waterproofing course, add the thermal insulation material, form water-proof thermal-insulation layer 10, to reduce or to block heat transmission between surperficial asphalt concrete pavement layer 6 and the concrete leveling layer 5.As shown in Figure 6.
(7) in the asphalt concrete pavement layer on surface, add the thermal insulation material, form thermal insulation asphalt concrete pavement layer 11, to reduce or to block heat transmission between surperficial asphalt concrete pavement layer and the waterproofing course 2.As Fig. 7.
If implement separately in above-mentioned seven kinds of modes, then with the 2nd and the 5th kind of method effect better, mat formation for the bridge of concrete pavement layer for the surface, it is better to mix result of use with the 2nd kind and the 1st, 3 kind. mat formation for the bridge of asphalt concrete pavement layer for the surface, then the 5th kind and the 4th, 6,7 kind mode mixed and use effect of heat insulation best, but cost slightly increases. in addition, can adopt 4-7 kind mode to be implemented when main beam structure adopts all steel shelf structure, only need save the concrete leveling layer and get final product this moment.
The utility model does not relate to the part prior art that maybe can adopt all same as the prior art to be realized.
Claims (2)
1. deck installation structure that reduces disadvantageous temperature effect on main girder structure of bridge, comprise the waterproofing course (2) and the concrete pavement layer (3) of mating formation successively on bridge main beam structure (1), it is characterized in that being provided with insulating layer (4) between waterproofing course (2) and the bridge main beam structure (1) and/or between waterproofing course (2) and the concrete pavement layer (3), the thickness of described insulating layer (4) is 1-100mm, and coefficient of thermal conductivity is not more than 0.8W/mk.
2. a deck installation structure that reduces disadvantageous temperature effect on main girder structure of bridge comprises concrete leveling layer (5), waterproofing course (2) and the asphalt concrete pavement layer (6) of mating formation successively on bridge main beam structure (1), it is characterized in that:
(a) between asphalt concrete pavement layer (6) and waterproofing course (2);
(b) between waterproofing course (2) and concrete leveling layer (5);
(c) between bridge main beam structure (1) and concrete leveling layer (5);
Have one at least and be provided with insulating layer (4) in above-mentioned (a) and (b), (c), the thickness of described insulating layer (4) is 1-100mm, and coefficient of thermal conductivity is not more than 0.8W/mk.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009200449655U CN201447663U (en) | 2009-06-08 | 2009-06-08 | Bridge deck laying structure capable of reducing the disadvantaged temperature effect of main bridge structures of bridges |
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| CN2009200449655U CN201447663U (en) | 2009-06-08 | 2009-06-08 | Bridge deck laying structure capable of reducing the disadvantaged temperature effect of main bridge structures of bridges |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104631316A (en) * | 2015-01-21 | 2015-05-20 | 大连理工大学 | Structure and method for adopting insulating concrete to reduce temperature stress of concrete girder bridge |
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2009
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104631316A (en) * | 2015-01-21 | 2015-05-20 | 大连理工大学 | Structure and method for adopting insulating concrete to reduce temperature stress of concrete girder bridge |
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Granted publication date: 20100505 |