CN202466349U - Fabricated prestressed heat-resistant cement concrete pavement - Google Patents
Fabricated prestressed heat-resistant cement concrete pavement Download PDFInfo
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- CN202466349U CN202466349U CN2012201088603U CN201220108860U CN202466349U CN 202466349 U CN202466349 U CN 202466349U CN 2012201088603 U CN2012201088603 U CN 2012201088603U CN 201220108860 U CN201220108860 U CN 201220108860U CN 202466349 U CN202466349 U CN 202466349U
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Abstract
The utility model discloses a fabricated prestressed heat-resistant cement concrete pavement. A plurality of fabricated prestressed heat-resistant pavement plates which are paved side by side on a base layer of a road required to be paved are spliced into a whole pavement, wherein a plurality of fabricated prestressed heat-resistant pavement plates have the same structure and the same longitudinal length in the running direction; each fabricated prestressed heat-resistant pavement plate comprises a fabricated prestressed pavement plate which consists of a plurality of pavement plate blocks connected by connecting plates, and a vermiculite concrete heat-resistant paving layer which is paved on the fabricated prestressed pavement plate; each pavement plate block comprises a plurality of common plates which are connected into a whole through longitudinal prestressed steel stranded wires; and the connecting plates and the common plates are cement concrete prefabricated plate blocks. The pavement is reasonable in structural design, convenient to construct, low in input cost and short in construction period and has heat resistance performance, the construction quality can be easily ensured, and problems of late open traffic, difficulty in repair, high heat absorption in summer and the like in the conventional fabricated cement concrete pavement can be solved.
Description
Technical field
The utility model belongs to assembling construction of cement concrete road surface technical field, especially relates to a kind of prefabricated PC resistance Hot Cement rigid pavement.
Background technology
The assembling cement concrete pavement has outstanding advantage such as can produce, construction speed is fast in batches; But in traditional assembling cement concrete pavement between plate and the plate effective problem of transmission of load be not resolved always; Thereby have the relatively poor deficiency of globality, influenced further promoting the use of of assembling cement concrete pavement.In addition, traditional assembling cement concrete pavement exists defective and deficiencies such as open to traffic is slow, reparation difficulty.Simultaneously, owing to portland cement concrete recepted the caloric greatly in summer, thereby the caloric receptivity of traditional assembling cement concrete pavement is big, is the major reason that increases city " heat island effect " summer.
The utility model content
The utility model technical problem to be solved is to above-mentioned deficiency of the prior art; A kind of prefabricated PC resistance Hot Cement rigid pavement is provided; Its reasonable in design, easy construction, have the resistance hot property and input cost is low, short construction period, construction quality are easy to guarantee, can solve open to traffic that traditional assembling cement concrete pavement exists late, repair the problem such as big that recepts the caloric in difficult, summer.
For solving the problems of the technologies described above; The technical scheme that the utility model adopts is: a kind of prefabricated PC resistance Hot Cement rigid pavement; It is characterized in that: hinder the monolithic road surface that hot road slab is assemblied to form by being laid on the multiple tracks prefabricated PC that needs in the laying road basic unit side by side; The structure that the said prefabricated PC of multiple tracks hinders hot road slab is all identical; Quantity, transverse width and the installation position that the said prefabricated PC of multiple tracks hinders hot road slab all with need laying road on quantity, transverse width and the installation position in set track consistent, and the said prefabricated PC of multiple tracks hinders hot road slab, and to follow the longitudinal length of car direction all identical;
Said prefabricated PC hinders hot road slab and comprises prefabricated PC road slab and the vermiculite concrete resistance heat shop layer that is laid on the said prefabricated PC road slab, and the thickness of said vermiculite concrete resistance heat shop layer is 1cm～2cm; Said prefabricated PC road slab comprises and follows a plurality of road surfaces plate that the car direction is laid from front to back, all is fastenedly connected through a junction plate between adjacent two the said road surface plates in front and back; Said road surface plate is assemblied to form by following the polylith common plate that the car direction lays from front to back; The structure of the said common plate of polylith is identical and its transverse width is all identical; The said common plate of polylith connects as one through the longitudinal prestressing steel strand of the parallel laying of multiple tracks, and said longitudinal prestressing steel strand follow the car direction and lay; Be respectively arranged with the prestress wire ground tackle that anchoring is carried out in a plurality of front and back ends to the said longitudinal prestressing steel strand of multiple tracks on two junction plates that lay both sides before and after the plate of said road surface; The bottom of the said common plate of polylith all has a plurality of longitudinal holes that supply the said longitudinal prestressing steel strand of multiple tracks to pass; The cloth set direction of a plurality of said longitudinal holes is all consistent with direction of traffic, and the quantity that the quantity of a plurality of said longitudinal holes and the said longitudinal prestressing steel strand of multiple tracks is set said prestress wire ground tackle on N and the junction plate is 2N; The structure of said common plate and junction plate and measure-alike and the two be rectangular cement concrete prefabricated chunk, the longitudinal length that said common plate and junction plate follow the car direction is 3m～5m, transverse width is 3.5m～4.0m and its thickness is 15cm～20cm;
The said prefabricated PC of multiple tracks hinders hot road slab and connects as one through the multiple tracks transverse prestress steel strand that follow the parallel laying from front to back of car direction, and equal correspondence is provided with the horizontal duct that the said transverse prestress steel strand of one or more confessions pass on said common plate and the junction plate.
Above-mentioned prefabricated PC resistance Hot Cement rigid pavement; It is characterized in that: all closely connect between the adjacent two said cement concrete prefabricated chunks in front and back, and equal correspondence is provided with the horizontal filleting groove that supplies the transverse joint fillet to install on the front and back sidewall of said cement concrete prefabricated chunk through the transverse joint fillet; The said prefabricated PC of adjacent twice hinders between the hot road slab and all closely connects through the longitudinal joint fillet, and equal correspondence is provided with the vertical filleting groove that supplies the longitudinal joint fillet to install on the left and right sides sidewall of said cement concrete prefabricated chunk.
Above-mentioned prefabricated PC resistance Hot Cement rigid pavement, it is characterized in that: the end, front and back of said cement concrete prefabricated chunk is step-like connection end.
Above-mentioned prefabricated PC resistance Hot Cement rigid pavement is characterized in that: the leading section of said cement concrete prefabricated chunk is that concave shape connects end and the convex shape connection end that is used for is connected the end with said convex shape, end thereafter.
Above-mentioned prefabricated PC resistance Hot Cement rigid pavement; It is characterized in that: the quantity of said transverse joint fillet is together; And equal correspondence is provided with said horizontal filleting groove together on the front and back sidewall of said cement concrete prefabricated chunk; The distance at the said cement concrete prefabricated chunk of said horizontal filleting slot pitch top is (1/3～1/2) d, and wherein d is the thickness of said cement concrete prefabricated chunk.
Above-mentioned prefabricated PC resistance Hot Cement rigid pavement; It is characterized in that: the quantity of said longitudinal joint fillet is together; And equal correspondence is provided with said vertical filleting groove together on the left and right sides sidewall of said cement concrete prefabricated chunk; The distance at the said cement concrete prefabricated chunk of said vertical filleting slot pitch top is (1/3～1/2) d, and wherein d is the thickness of said cement concrete prefabricated chunk
Above-mentioned prefabricated PC resistance Hot Cement rigid pavement; It is characterized in that: the quantity in set said horizontal duct is two on said common plate and the junction plate, and all set horizontal ducts are uniformly distributed with and are located on the same horizontal plane on said common plate and the junction plate.
Above-mentioned prefabricated PC resistance Hot Cement rigid pavement is characterized in that: the structure of a plurality of said longitudinal holes all identical with size and its all be laid on the same horizontal plane, a plurality of said longitudinal holes are even laying.
Above-mentioned prefabricated PC resistance Hot Cement rigid pavement, it is characterized in that: the cross section of said longitudinal holes is square; The cross section in said horizontal duct is circular.
Above-mentioned prefabricated PC resistance Hot Cement rigid pavement, it is characterized in that: the quantity of the said common plate of polylith is 7～15.
The utility model compared with prior art has the following advantages:
1, the utility model reasonable in design, laying are conveniently and resistance heat energy power is strong, result of use good, mainly are made up of cement concrete precast plate (comprising common plate and junction plate), prestress wire, prestress wire ground tackle and seam fillet etc.Prefabricated PC that the utility model adopts resistance Hot Cement rigid pavement is that prefabricated cement concrete slab is assemblied in the basic unit that has accomplished; Compare with the construction technology on assembling road surface; The special character of the utility model is with applying the process that prestressed process replaces mortar to pave; Therefore, the particularity of work progress is presented in prestressed applying on the process.Usually; For the local pressure that the prestressing force that applies and road slab are born unlikely excessive; And the long bigger loss of prestress that causes of presstressed reinforcing steel, make vertical 15～20 block road plates (being the cement concrete precast plate) as a wholely usually, be fixed together with prestress wire.
2, the prefabricated of cement concrete precast plate can be realized batch production production, and the fast and quality of speed of production can be effectively controlled.This common plate and junction plate through material mix proportion design, physical dimension design and production method design after, can be in factory's large-scale production, overcome the shortcoming that highway engineering construction is in the past built the yard of material at the construction field (site), accelerated speed of production greatly.Simultaneously, common plate and junction plate have effectively ensured board quality through strict theoretical research and laboratory test.In addition, overcome the component that concrete mixture causes owing to the difference in the place of production difference, transport, build, the variability of concrete flag intensity that the difference of condition such as health causes.Especially road slab is in indoor health, and quality is controlled more easily.In addition, what deserves to be mentioned is, owing to receive novel resistance hot material---the cost and the reserves restriction of vermiculite, the Concrete Construction thickness that is added with vermiculite should be controlled within 1cm～2cm, when adopting cast-in-place construction, is difficult to control; And when factory's large-scale production, this index can be controlled effectively, and has effectively promoted vermiculite in the application aspect hot of road roadlock.
3, pavement construction is convenient, and speed is fast, the cycle is short, can be while constructing traffick, instant effect.The prefabricated PC resistance Hot Cement concrete pavement construction that the utility model adopted is convenient, has accelerated speed of application greatly, has shortened the construction period.Simultaneously, but be open to traffic, help conveniently marching into the arena of construction machinery and Construction traffic, accelerating construction progress while constructing.Below time that is open to traffic of the utility model and several kinds of different types of road is compared: time＞=16 day of being open to traffic behind the construction of cement concrete road surface; Time＞=3 day of being open to traffic behind the asphalt concrete pavement construction, but the prefabricated PC that the utility model adopted resistance Hot Cement rigid pavement is open to traffic while constructing.
4, the required plant equipment of construction is few, and material usage is economized, and energy consumption is low, reduces construction costs and other expense greatly.The job practices that the utility model adopted is simple; Reduced the paving process of cement in the past or asphalt concrete pavement; Thereby required construction machinery is simple; Required constructor is few, has saved the consumption of various construction materials and the input of manpower and materials greatly, has reduced other expenses such as construction costs.
5, the existence of prestressed reinforcement has increased the globality of cement concrete precast plate, and low than the Portland cement concrete pavement noise during driving, roadability is better.Though can't compare with the road-ability of the asphalt concrete pavement that does not have seam mutually in the prefabricated PC that the utility model adopted resistance Hot Cement rigid pavement; But owing to applied horizontal and vertical prestress wire; Improve the globality of cement concrete precast plate, and improved road-ability to a certain extent.Simultaneously, bear the effect of vehicular load between the adjacent plate through steel strand together, and can make cement concrete pavement possess certain flexibility, reduced the driving noise.
6, pavement construction does not pollute environment.Traditional pavement engineering construction needs more construction machinery, produces bigger noise during the operation of construction machinery motor, and the vibrating roller of employing is owing to the operating principle of its Centrifugal vibration, and its noise has irregularities.Simultaneously, the traditional pavement engineering construction process requirement and the intermittence of operation, the noise that makes machinery send has discontinuity; Some equipment (like mixer) frequency is overcast, is difficult for decay, and makes the people feel fidgety, has sudden and pulsating nature.Simultaneously, waste material of buildings quantity is many in traditional pavement engineering construction, mainly comprises refuses such as cement in the construction, timber, packaging material.These discarded objects are buried under the ground, and can cause phreatic pollution, directly jeopardize peripheral resident's life.The prefabricated PC resistance Hot Cement rigid pavement that the utility model adopted can effectively overcome above two shortcomings; Noise pollution and noxious waste pollution have been reduced; Control and slowed down the adverse effect of highway pavement construction to ecological environment; Exchange higher highway construction benefit for lower depletion of resources and environmental degradation, realize the highway construction sustainable development, it is significant that China is built a resource-conserving and environment-friendly society.
7, the maintenance on road surface, easy to maintenance has higher society and economic benefit.The various causes of disease more complicated of cement or asphalt concrete pavement, maintenance and maintenance difficult, especially cement concrete pavement; Because seam is more, and the complex structure of seam crossing, pulls one hair and move the whole body; Cement concrete itself has the big characteristics of intensity in addition, some diseases appear and after, the maintenance very the difficulty; Generally need large-scale trimming, cause a large amount of wastes of material.In addition, cement concrete forms certain intensity needs at least 7 days, and health-preserving condition is harsh, and is very big to the influence of traffic system.And the plate maintenance of the prefabricated PC that the utility model adopted resistance Hot Cement rigid pavement is accomplished in precast yard, and condition is desirable; And it is convenient relatively to keep in repair, and the time that influence is open to traffic is short, efficiently solves the difficult problem of rigid pavement maintenance difficult.
8, have resistance hot merit ability, effectively alleviating urban heat island effect.The road crust of the utility model is the concrete surface layer of admixture vermiculite; Characteristics such as that vermiculite has is in light weight, high temperature resistant, Heat stability is good, thermal conductivity is low, thermal capacitance is little; Intercepted hot-fluid that upwards flows under the face of land night and the hot-fluid that flows downward by the face of land daytime, can effectively reduce in the road slab owing to the thermal stresses that causes than the big temperature difference.Simultaneously, help regulating the urban surface temperature, reduce urban heat land effect greatly, this is to urban atmosphere adjusting, protection of groundwater resource, and human settlement's the improvement and the ecological environment of entire city are significant.Find that through test the rigid pavement that is added with vermiculite can make ambient temperature reduce by 2 ℃～4 ℃, this is appreciable for a city, can effectively reduce the use of air-conditioning, practices thrift a large amount of electric power resources, has very considerable economic.
9, practical value is high, both can solve the deficiency of traditional assembling cement-concrete road globality difference, can reduce the caloric receptivity of cement concrete pavement simultaneously, alleviating urban heat island effect.Simultaneously; The prefabricated PC cement concrete slab that the utility model adopted have bearing capacity big, to the diffusion of wheel load with transmit characteristics such as performance is good; Therefore under identical load, identical ground modulus condition, compare with cast-in-place Infinite Plate rigid pavement; Thickness can attenuate, has directly reduced engineering cost.In addition; Prefabricated PC that the utility model adopts resistance Hot Cement rigid pavement can be avoided staying and establish constuction joint, saves dowel bar, seam crossing as hinged the same can be free movable; Its distortion is similar with flexible pavement, but occurs rut and local plastic deformation easily unlike flexible pavement.
10, popularizing application prospect is extensive, and Chinese national economy develop rapidly in recent years, economic development are accompanied by the increase day by day of the traffic volume, and construction of the highway is had higher requirement.Wherein, Intensity is high, the road structure of good endurance is widely used in the road construction, the prestressing force assembling resistance Hot Cement rigid pavement that the utility model adopted than Common Concrete Pavement have intensity height, resistance good in thermal property, characteristics such as construction technology is simple, progress is fast.Replace Common Concrete Pavement to be applied in the highway construction prestressing force assembling resistance Hot Cement rigid pavement, its economy and obvious social benefit are for cement concrete pavement design provides new approaches.The raising that Along with people's requires construction speed, the assembling road surface that can improve construction speed greatly can obtain popularization energetically, and its advantage for ease of maintenaince also can attract people's attention, in particular for the paving in wartime.In addition, improve the human settlement, enhance harmony between man and nature and constantly brought into schedule, the resistance hot merit of the utility model is imitated is worth helping its further popularization.
11, applied widely, the utility model is the post-stressed assembling cement concrete pavement that is applied to, and planar dimension, thickness, prestressed pore passage section configuration, seam and the ground surface material of prefabricated cement concrete slab designed.In addition; The vermiculite that coefficient of thermal conductivity is little is used for the top layer of prefabricated cement concrete slab as gathering materials; To form heat resistant layer, can be applicable to arterial street, major trunk roads, possess that construction is simple, construction speed fast in; Have the function that reduces the cement concrete pavement caloric receptivity, help to alleviate the urban heat land effect in summer.
In sum; The utility model road structure is reasonable in design, easy construction, have the resistance hot property and input cost is low, short construction period, construction quality are easy to guarantee, can effectively solve open to traffic that traditional assembling cement concrete pavement exists late, repair difficulty, summer caloric receptivity practical problem such as big.
Through accompanying drawing and embodiment, the technical scheme of the utility model is done further detailed description below.
Description of drawings
Fig. 1 is the plane structure sketch map of utility model.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the B-B sectional view of Fig. 1.
Fig. 4 is the C-C sectional view of Fig. 1.
Fig. 5 is the D-D sectional view of Fig. 1.
Fig. 6 is the job practices FB(flow block) of the utility model.
Fig. 7 by the utility model employing vermiculite and common building stones at the infrared image comparison diagram of heating after 10 minutes under the iodine-tungsten lamp.
Fig. 8 by the utility model employing vermiculite and common building stones at the infrared image comparison diagram of heating after 20 minutes under the iodine-tungsten lamp.
Description of reference numerals:
1-junction plate; 2-longitudinal prestressing steel strand; 3-transverse prestress steel strand;
4-transverse joint fillet; 5-longitudinal joint fillet; 6-common plate;
7-steel plate; 8-steel strand anchored end.
The specific embodiment
Like Fig. 1, Fig. 2, Fig. 3, Fig. 4 and shown in Figure 5; The utility model hinders the monolithic road surface that hot road slab is assemblied to form by being laid on the multiple tracks prefabricated PC that needs in the laying road basic unit side by side; The structure that the said prefabricated PC of multiple tracks hinders hot road slab is all identical; Quantity, transverse width and the installation position that the said prefabricated PC of multiple tracks hinders hot road slab all with need laying road on quantity, transverse width and the installation position in set track consistent, and the said prefabricated PC of multiple tracks hinders hot road slab, and to follow the longitudinal length of car direction all identical.
Said prefabricated PC hinders hot road slab and comprises prefabricated PC road slab and the vermiculite concrete resistance heat shop layer that is laid on the said prefabricated PC road slab, and the thickness of said vermiculite concrete resistance heat shop layer is 1cm～2cm.Said prefabricated PC road slab comprises and follows a plurality of road surfaces plate that the car direction is laid from front to back, all is fastenedly connected through a junction plate 1 between adjacent two the said road surface plates in front and back.In the present embodiment, the resistance heat shop layer that said vermiculite concrete resistance heat shop layer forms for being mated formation by vermiculite concrete, and actual when mating formation, adopt the C40 proportioning of cement concrete to be used for the construction of vermiculite concrete resistance heat shop layer.
In the vermiculite concrete that is adopted, the material usage (Kg/m of every cubic metre of vermiculite concrete
3) be cement: water: fine aggregate: rubble=380: 152: 702: 1196.Wherein, water/binder ratio (being the ratio of the weight of water and cement) W/C=0.40; In fine aggregate, vermiculite accounts for 50% ± 5% of fine aggregate gross mass, and all the other are medium sand.In the present embodiment, water/binder ratio (being the ratio of the weight of water and cement) W/C=0.40; In fine aggregate, vermiculite accounts for 50% of fine aggregate gross mass, and all the other are medium sand; Cement is P.O42.5 cement.
Said road surface plate is assemblied to form by following the polylith common plate 6 that the car direction lays from front to back; The structure of the said common plate 6 of polylith is identical and its transverse width is all identical; The said common plate 6 of polylith connects as one through the longitudinal prestressing steel strand 2 of the parallel laying of multiple tracks, and said longitudinal prestressing steel strand 2 follow the car direction and lay; Be respectively arranged with the prestress wire ground tackle that anchoring is carried out in a plurality of front and back ends to the said longitudinal prestressing steel strand 2 of multiple tracks on two junction plates 1 that lay both sides before and after the plate of said road surface; The bottom of the said common plate 6 of polylith all has a plurality of longitudinal holes that supply the said longitudinal prestressing steel strand 2 of multiple tracks to pass; The cloth set direction of a plurality of said longitudinal holes is all consistent with direction of traffic, and the quantity that the quantity of a plurality of said longitudinal holes and the said longitudinal prestressing steel strand 2 of multiple tracks is set said prestress wire ground tackle on N and the junction plate 1 is 2N.The structure of said common plate 6 and junction plate 1 and measure-alike and the two be rectangular cement concrete prefabricated chunk, said common plate 6 is 3m～5m with the longitudinal length that junction plate 1 follows the car direction, transverse width is 3.5m～4.0m and its thickness is 15cm～20cm.
Actual when prefabricated, so that transportation and construction hoisting, said common plate 6 is 3m～5m with the longitudinal length that junction plate 1 follows the car direction for the weight of controlling the cement concrete prefabricated chunk; Simultaneously, for consistent with curb-to-curb width, said common plate 6 is identical with the portland cement concrete plate perpendicular to the width of direction of traffic with junction plate 1, i.e. 3.5m～4.0m.
The said prefabricated PC of multiple tracks hinders hot road slab and connects as one through the multiple tracks transverse prestress steel strand 3 that follow the parallel laying from front to back of car direction, and equal correspondence is provided with the horizontal duct that the said transverse prestress steel strand 3 of one or more confessions pass on said common plate 6 and the junction plate 1.
The thickness of said cement concrete prefabricated chunk is the key factor of decision road surface supporting capacity; When thickness is not enough; The cement concrete pavement that forms of mating formation can rupture under the effect of vehicular load; And in cement concrete precast plate hoisting process hogging moment can take place, but through the position, Heave Here reasonably is set, can hogging moment be controlled in the very little scope.Therefore, the thickness of prefabricated cement concrete slab is main to satisfy traffic load.Because the space of reserving for longitudinal prestressing steel strand 2 in the present patent application is open longitudinal holes; The effective depth of slab of in fact said cement concrete prefabricated chunk should deduct the height of said longitudinal holes; But the length that follows on the car direction of considering said cement concrete prefabricated chunk is littler than the length of portland cement concrete plate; Can reduce the flexural tensile stress at the bottom of the plate; Therefore, the thickness of slab of said cement concrete prefabricated chunk (the longitudinal holes height that comprises reservation) is identical with the thickness of slab method for designing of portland cement concrete plate.
In the present embodiment, said common plate 6 is 5m with the longitudinal length that junction plate 1 follows the car direction, transverse width is 4.0m and its thickness is 20cm.When actual prefabricated, the size of said common plate 6 and junction plate 1 can adjust accordingly according to concrete needs.
In the present embodiment, the concrete strength of said junction plate 1 is higher than the concrete strength of common plate 6.When actual prefabricated, said junction plate 1 forms by C50 is concrete prefabricated, and common plate 6 forms by C30 is concrete prefabricated.
All closely connect between the adjacent two said cement concrete prefabricated chunks in front and back, and equal correspondence is provided with the horizontal filleting groove that supplies transverse joint fillet 4 to install on the front and back sidewall of said cement concrete prefabricated chunk through transverse joint fillet 4; The said prefabricated PC of adjacent twice hinders between the hot road slab and all closely connects through longitudinal joint fillet 5, and equal correspondence is provided with the vertical filleting groove that supplies longitudinal joint fillet 5 to install on the left and right sides sidewall of said cement concrete prefabricated chunk.
In the present embodiment; The quantity of said transverse joint fillet 4 is together; And equal correspondence is provided with said horizontal filleting groove together on the front and back sidewall of said cement concrete prefabricated chunk; The distance at the said cement concrete prefabricated chunk of said horizontal filleting slot pitch top is (1/3～1/2) d, and wherein d is the thickness of said cement concrete prefabricated chunk; The quantity of said longitudinal joint fillet 5 is together; And equal correspondence is provided with said vertical filleting groove together on the left and right sides sidewall of said cement concrete prefabricated chunk; The distance at the said cement concrete prefabricated chunk of said vertical filleting slot pitch top is (1/3～1/2) d, and wherein d is the thickness of said cement concrete prefabricated chunk.
Actually add man-hour, can be according to concrete needs, the laying of said horizontal filleting groove and said vertical filleting groove is highly adjusted accordingly.In the present embodiment; Said transverse joint fillet 4 is the rubber fillet with longitudinal joint fillet 5; It is semicircular groove that said horizontal filleting groove and said vertical filleting groove are the cross section, and can insert the rubber fillet in the groove, to prevent that rainwater from passing through seam and infiltrating road structure.
During for the ease of splicing, can be interlocked better between the two said cement concrete prefabricated chunks in front and back reduces the slit, and in order effectively to transmit load between the adjacent two said cement concrete prefabricated chunks in front and back.In the present embodiment, the end, front and back of said cement concrete prefabricated chunk is step-like connection end.During practice of construction, the leading section of said cement concrete prefabricated chunk also can connect end and the convex shape connection end that is used for is connected the end with said convex shape, end thereafter for concave shape.
In the present embodiment; In conjunction with Fig. 2 and Fig. 3; This moment, direction of traffic should be from left to right; For avoiding faulting of slab ends, the sidepiece of the step-like connection end of said cement concrete prefabricated chunk front and back end is shaped as
shape.In the practice of construction process; For other half range highway section; Specifically be when direction of traffic for from right to left the time, the sidepiece of the step-like connection end of said cement concrete prefabricated chunk front and back end is shaped as
shape.
In the present embodiment, the quantity in set said horizontal duct is two on said common plate 6 and the junction plate 1, and all set horizontal ducts are uniformly distributed with and are located on the same horizontal plane on said common plate 6 and the junction plate 1.The structure of a plurality of said longitudinal holes all identical with size and its all be laid on the same horizontal plane, a plurality of said longitudinal holes are even laying.
In the present embodiment, the quantity in set horizontal duct is 2 on said common plate 6 and the junction plate 1, and the quantity of set a plurality of said longitudinal holes is 3 on the said common plate 6.Actual when prefabricated, can be according to actual needs, the quantity in said longitudinal holes and said horizontal duct is adjusted accordingly.
In the present embodiment, the cross section of said longitudinal holes is a square; The cross section in said horizontal duct is circular.
The size in said longitudinal holes and said horizontal duct is confirmed according to the diameter of selected presstressed reinforcing steel (being longitudinal prestressing steel strand 2 and transverse prestress steel strand 3); Because presstressed reinforcing steel need be provided with two-layer up and down (transverse prestress steel strand 3 are laid longitudinal prestressing steel strand 2 tops); Therefore laterally the laying in duct highly must be satisfied the requirement of placing two presstressed reinforcing steels; In order to reduce mutual frictional prestress loss owing to presstressed reinforcing steel; (being between transverse prestress steel strand 3 and the longitudinal prestressing steel strand 2) also needs certain spacing between two presstressed reinforcing steels up and down; Thereby the width in said horizontal duct is 1.5cm～2cm, and said horizontal duct center to center distance its distance of the cement concrete prefabricated chunk of laying bottom be 5cm.
In the present embodiment; Actually add man-hour; Said longitudinal holes is the square duct that is laid in said cement concrete prefabricated chunk bottom and is of a size of 2cm * 2cm; And the bottom in said square duct is not sealed, this square hole road have convenient damaged plate replacing, be easy to build advantage such as moulding; Said horizontal duct is the circular duct of diameter 2cm, and said circular duct center to center distance its distance of the cement concrete prefabricated chunk of laying bottom be 5cm.
In the present embodiment; The quantity of set said prestress wire ground tackle is 6 on the said junction plate 1; The top correspondence of junction plate 1 is provided with 6 blocks of steel plates 7 that said prestress wire ground tackle is protected simultaneously, and the anchored end of longitudinal prestressing steel strand 2 on said prestress wire ground tackle is the steel strand anchored end 8 that is positioned at junction plate 1 inside.
In addition, because said prestress wire ground tackle will be fixed in junction plate 1 bottom.When reality designs the anchorage zone on the junction plate 1; Should guarantee when stretch-draw longitudinal prestressing steel strand 2; The concrete of anchorage zone, said prestress wire ground tackle below does not ftracture and does not produce excessive distortion, requires to calculate the requirement that the indirect steel strand that disposed under the said prestress wire ground tackle satisfy the local compression bearing capacity again.During actual the laying, the control stress for prestressing permissible value of multiclass prestressed reinforcement is seen table 1:
Control stress for prestressing permissible value [the σ of table 1 multiclass prestressed reinforcement
Con]
| The prestressed reinforcement kind | Post-tensioned prestressing |
| Carbon steel wire, indented wire, steel strand | 0.75f ptk |
| Cold-drawn low-carbon wire, heat treatment steel wire | 0.7f ptk |
| Cold drawn steel wire | 0.9f pyk |
Annotate: f in the table 1
PykAnd f
PtkThe strength standard value of representing prestressed reinforcement respectively.
To sum up; Common plate that the utility model adopts 6 is the cement concrete precast plate with junction plate 1; And said cement concrete precast plate is divided into two parts up and down, and wherein top is divided into the vermiculite concrete resistance heat shop layer of thickness 1cm～2cm, and gathering materials of said vermiculite concrete resistance heat shop layer is main with the calcining vermiculite mainly; The extremely low 0.04W/ (M.K) of the thermal conductivity of expanded vermiculite～0.12W/ (M.K) is used for concrete gathering materials with expanded vermiculite; The used material of the lower part material of said cement concrete precast plate and portland cement concrete plate is identical.Find through experiment; The resistance thermal effect of vermiculite is remarkable; Fig. 7 is that vermiculite and common building stones heat the infrared image comparison diagram after 10 minutes under iodine-tungsten lamp; Fig. 8 is that vermiculite and common building stones heat the infrared image comparison diagram after 20 minutes under iodine-tungsten lamp, and the left side is calcining vermiculite and right side and is common building stones among Fig. 7 and Fig. 8.Can find out by Fig. 7 and Fig. 8: under same heating condition, nearly 20 ℃ of the temperature difference between vermiculite and the common building stones.Thereby according to conservative estimation, common plate that the utility model adopts 6 reduces about 5 ℃～8 ℃ of temperature on average with junction plate 1 comparable portland cement concrete plate, and this is energy-conservation for urban architecture to be significant with improvement thermal environment.Therefore, the utility model helps energy conservation, improves city atmospheric environment and local low-grade fever environment.
During practice of construction, the quantity of the said common plate 6 of included polylith is 7～15 in the plate of said road surface.In the present embodiment, the quantity of the said common plate 6 of included polylith is 10 in the plate of said road surface, can be according to concrete needs, the quantity of the said common plate 6 of included polylith in the plate of said road surface is adjusted accordingly.
As shown in Figure 6, the work progress of the utility model may further comprise the steps:
The precasting yard of said cement concrete prefabricated chunk is laid near the construction area, thereby in the prefabricated process of said cement concrete prefabricated chunk, and making basic unit on the need laying road simultaneously is to save the engineering time.
Because the weight of every cement concrete prefabricated chunk is little, precasting yard is nearer apart from the building site, and therefore common lifting transport vehicle can be accomplished the lifting and the transportation of cement concrete prefabricated chunk.When the lifting of cement concrete prefabricated chunk and transportation, pay special attention to the protection at opposite side, angle.
Step 301, first road slab are laid: earlier first road slab on the need laying road The initial segment is laid; Said first road slab comprises a junction plate 1 and two said road surface plates that are positioned at these both sides, junction plate 1 front and back, and its process of deployment may further comprise the steps:
Step 3011, the lifting of middle part junction plate and laying: the junction plate that needs in said first road slab to lay 1 lifting is put in place, and the junction plate 1 that lifting puts in place is laid according to the laying method of conventional cement concrete precast plate.
Step 3012, prestress wire are laid: all the longitudinal prestressing steel strand 2 to the plate bottom, two said road surfaces that needs in said first road slab to lay needs to lay are laid respectively with all transverse prestress steel strand 3; Simultaneously, lay having laid all the transverse prestress steel strand 3 that to lay junction plate 1 bottom in the step 3011.
Step 3013, the lifting of road surface plate: the said common plate 6 of polylith that will form two said road surface plates in the step 3012 all lifts and puts in place.
Step 3014, front and back junction plate lifting and laying: two junction plates 1 will both sides, said first road slab front and back laying lift respectively and put in place, and according to the laying method of conventional cement concrete precast plate two said junction plates 1 that lifting puts in place are laid; Simultaneously, all the transverse prestress steel strand 3 that need lay two said junction plate 1 bottoms of being laid in this step are laid respectively.
Step 3015, longitudinal prestressing steel strand tension and anchoring: the said common plate 6 of polylith through lifting two said road surfaces of the composition plate that puts in place in 2 pairs of steps 3013 of all longitudinal prestressing steel strand of being laid in the step 3012 carries out stretch-draw respectively; And the rear and front end of longitudinal prestressing steel strand 2 after the stretch-draw is anchored at respectively on two said junction plates 1 that lay both sides before and after it, then accomplish the process of deployment of said first road slab.
Step 302, next road surface plate are laid, and its process of deployment is following:
Step 3021, prestress wire are laid: the current laying accomplished all longitudinal prestressing steel strand 2 and all transverse prestress steel strand 3 that the plate bottom, next road surface of being laid the road slab front side needs laying, lay respectively.
Step 3022, the lifting of road surface plate: the said common plate 6 of polylith that will be assemblied to form the plate of next road surface described in the step 3021 all lifts and puts in place.
Step 3023, the lifting of preceding side connecting plate and laying: junction plate 1 lifting that plate front side, next road surface described in the step 3021 need be laid puts in place, and according to the laying method of conventional cement concrete precast plate the junction plate 1 that lifting puts in place is laid.
Step 3024, longitudinal prestressing steel strand tension and anchoring: the said common plate 6 of polylith that puts in place through 2 pairs of step 3022 liftings of all longitudinal prestressing steel strand of being laid in the step 3021 carries out stretch-draw; And the rear and front end of longitudinal prestressing steel strand 2 after the stretch-draw is anchored at respectively on two said junction plates 1 that lay both sides before and after it, then accomplish the process of deployment of said next road surface plate;
Step 303, repeatedly repeating step 3021 is to step 3024, until accomplishing whole process of deployment that one prefabricated PC hinders hot road slab;
Step 304, repeatedly repeating step 301 is to step 303, and the said prefabricated PC of on the need laying road, being laid of multiple tracks hinders hot road slab and all lays completion; And the said prefabricated PC of multiple tracks hinders hot road slab all lay completion after, the transverse prestress steel strand 3 that utilize in step 3012 and the step 3021 to be laid hinder hot road slab with the current said prefabricated PC of multiple tracks of having laid completion and are fastenedly connected and are one.
The above; It only is the preferred embodiment of the utility model; Be not that the utility model is done any restriction; Everyly any simple modification that above embodiment did, change and equivalent structure are changed, all still belong in the protection domain of the utility model technical scheme according to the utility model technical spirit.
Claims (10)
1. a prefabricated PC hinders the Hot Cement rigid pavement; It is characterized in that: hinder the monolithic road surface that hot road slab is assemblied to form by being laid on the multiple tracks prefabricated PC that needs in the laying road basic unit side by side; The structure that the said prefabricated PC of multiple tracks hinders hot road slab is all identical; Quantity, transverse width and the installation position that the said prefabricated PC of multiple tracks hinders hot road slab all with need laying road on quantity, transverse width and the installation position in set track consistent, and the said prefabricated PC of multiple tracks hinders hot road slab, and to follow the longitudinal length of car direction all identical;
Said prefabricated PC hinders hot road slab and comprises prefabricated PC road slab and the vermiculite concrete resistance heat shop layer that is laid on the said prefabricated PC road slab, and the thickness of said vermiculite concrete resistance heat shop layer is 1cm～2cm; Said prefabricated PC road slab comprises and follows a plurality of road surfaces plate that the car direction is laid from front to back, all is fastenedly connected through a junction plate (1) between adjacent two the said road surface plates in front and back; Said road surface plate is assemblied to form by following the polylith common plate (6) that the car direction lays from front to back; The structure of the said common plate of polylith (6) is identical and its transverse width is all identical; The said common plate of polylith (6) connects as one through the longitudinal prestressing steel strand (2) of the parallel laying of multiple tracks, and said longitudinal prestressing steel strand (2) follow the car direction and lay; Be respectively arranged with the prestress wire ground tackle that anchoring is carried out in a plurality of front and back ends to the said longitudinal prestressing steel strand of multiple tracks (2) on two junction plates (1) that lay both sides before and after the plate of said road surface; The bottom of the said common plate of polylith (6) all has a plurality of longitudinal holes that supply the said longitudinal prestressing steel strand of multiple tracks (2) to pass; The cloth set direction of a plurality of said longitudinal holes is all consistent with direction of traffic, and it is 2N that the quantity of the said longitudinal prestressing steel strand of a plurality of said longitudinal holes and multiple tracks (2) is N quantity individual and the last set said prestress wire ground tackle of junction plate (1); The structure of said common plate (6) and junction plate (1) and measure-alike and the two be rectangular cement concrete prefabricated chunk, the longitudinal length that said common plate (6) and junction plate (1) follow the car direction is 3m～5m, transverse width is 3.5m～4.0m and its thickness is 15cm～20cm;
The said prefabricated PC of multiple tracks hinders hot road slab and connects as one through the multiple tracks transverse prestress steel strand (3) that follow the parallel laying from front to back of car direction, and equal correspondence is provided with the horizontal duct that the said transverse prestress steel strand of one or more confessions (3) pass on said common plate (6) and the junction plate (1).
2. according to the described prefabricated PC resistance of claim 1 Hot Cement rigid pavement; It is characterized in that: all closely connect between the adjacent two said cement concrete prefabricated chunks in front and back, and equal correspondence is provided with the horizontal filleting groove that supplies transverse joint fillet (4) to install on the front and back sidewall of said cement concrete prefabricated chunk through transverse joint fillet (4); The said prefabricated PC of adjacent twice hinders between the hot road slab and all closely connects through longitudinal joint fillet (5), and equal correspondence is provided with the vertical filleting groove that supplies longitudinal joint fillet (5) to install on the left and right sides sidewall of said cement concrete prefabricated chunk.
3. according to claim 1 or 2 described prefabricated PC resistance Hot Cement rigid pavements, it is characterized in that: the end, front and back of said cement concrete prefabricated chunk is step-like connection end.
4. according to claim 1 or 2 described prefabricated PCs resistance Hot Cement rigid pavements, it is characterized in that: the leading section of said cement concrete prefabricated chunk is that concave shape connects end and the convex shape connection end that is used for is connected the end with said convex shape, end thereafter.
5. according to the described prefabricated PC resistance of claim 2 Hot Cement rigid pavement; It is characterized in that: the quantity of said transverse joint fillet (4) is together; And equal correspondence is provided with said horizontal filleting groove together on the front and back sidewall of said cement concrete prefabricated chunk; The distance at the said cement concrete prefabricated chunk of said horizontal filleting slot pitch top is (1/3～1/2) d, and wherein d is the thickness of said cement concrete prefabricated chunk.
6. according to the described prefabricated PC resistance of claim 5 Hot Cement rigid pavement; It is characterized in that: the quantity of said longitudinal joint fillet (5) is together; And equal correspondence is provided with said vertical filleting groove together on the left and right sides sidewall of said cement concrete prefabricated chunk; The distance at the said cement concrete prefabricated chunk of said vertical filleting slot pitch top is (1/3～1/2) d, and wherein d is the thickness of said cement concrete prefabricated chunk
7. according to claim 1 or 2 described prefabricated PC resistance Hot Cement rigid pavements; It is characterized in that: the quantity that said common plate (6) and junction plate (1) are gone up set said horizontal duct is two, and all set horizontal ducts are uniformly distributed with and are located on the same horizontal plane on said common plate (6) and the junction plate (1).
8. according to claim 1 or 2 described prefabricated PCs resistance Hot Cement rigid pavements, it is characterized in that: the structure of a plurality of said longitudinal holes all identical with size and its all be laid on the same horizontal plane, a plurality of said longitudinal holes are even laying.
9. according to claim 1 or 2 described prefabricated PC resistance Hot Cement rigid pavements, it is characterized in that: the cross section of said longitudinal holes is square; The cross section in said horizontal duct is circular.
10. according to claim 1 or 2 described prefabricated PC resistance Hot Cement rigid pavements, it is characterized in that: the quantity of the said common plate of polylith (6) is 7～15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201088603U CN202466349U (en) | 2012-03-21 | 2012-03-21 | Fabricated prestressed heat-resistant cement concrete pavement |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201088603U CN202466349U (en) | 2012-03-21 | 2012-03-21 | Fabricated prestressed heat-resistant cement concrete pavement |
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| CN202466349U true CN202466349U (en) | 2012-10-03 |
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| CN2012201088603U Expired - Fee Related CN202466349U (en) | 2012-03-21 | 2012-03-21 | Fabricated prestressed heat-resistant cement concrete pavement |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535295A (en) * | 2012-03-21 | 2012-07-04 | 长安大学 | Fabricated prestressed heat-resistant cement concrete pavement and construction process thereof |
| CN108486977A (en) * | 2018-04-04 | 2018-09-04 | 长安大学 | A kind of tunnel cement concrete pavement structure |
-
2012
- 2012-03-21 CN CN2012201088603U patent/CN202466349U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535295A (en) * | 2012-03-21 | 2012-07-04 | 长安大学 | Fabricated prestressed heat-resistant cement concrete pavement and construction process thereof |
| CN102535295B (en) * | 2012-03-21 | 2014-12-10 | 长安大学 | Fabricated prestressed heat-resistant cement concrete pavement and construction process thereof |
| CN108486977A (en) * | 2018-04-04 | 2018-09-04 | 长安大学 | A kind of tunnel cement concrete pavement structure |
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