CN216237936U - Beam foundation assembled shop front structure - Google Patents
Beam foundation assembled shop front structure Download PDFInfo
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- CN216237936U CN216237936U CN202122823136.0U CN202122823136U CN216237936U CN 216237936 U CN216237936 U CN 216237936U CN 202122823136 U CN202122823136 U CN 202122823136U CN 216237936 U CN216237936 U CN 216237936U
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Abstract
The utility model discloses a beam foundation fabricated pavement structure, which relates to the field of cement-concrete pavements, and comprises a roadbed and a subbase, wherein each group of prefabricated cement-concrete beams consists of two transverse prefabricated cement-concrete beams and two longitudinal prefabricated cement-concrete beams, a connecting component is not arranged between each beam, the transverse prefabricated cement-concrete beams and the longitudinal prefabricated cement-concrete beams are stressed independently, the structure is simple, the construction efficiency is improved greatly, the construction period is shortened, more stable support can be provided for a pavement slab through the structural combination of the prefabricated cement-concrete beams, a filling body and the subbase, the fatigue resistance and the deformation resistance are excellent, the stress concentration phenomenon is controllable, the probability of damage of the slab body caused by the temperature and load action is effectively reduced, the water prefabricated cement-concrete beams are arranged below a joint, good support is provided for the joint while the rigidity of the slab is increased, thereby forming a beam-type base deck pavement structure of approximately equal stiffness.
Description
Technical Field
The utility model relates to the technical field of cement-concrete pavements, in particular to a beam foundation assembled pavement structure.
Background
The assembled cement concrete pavement technology is an ideal fast paving technology, the cement concrete is placed in a prefabricating factory in the most time-consuming process of setting, hardening and strength increasing, when the strength of the cement concrete reaches the design requirement, the cement concrete is transported to a construction site, and the traffic can be opened after the assembly is finished. With the increase of traffic volume, the demand of fabricated cement concrete pavements is increasing, but at present, some problems still exist.
Load is transmitted between the traditional multilayer structure assembly type cement concrete pavement slabs through joints, the joint treatment work is complicated and the load transmission effect is common, most of the pavement slabs are damaged and started from the joints, and therefore the pavement slabs are still weak links of the whole pavement. In addition, the plate bottom functional layer mainly depends on a grouting process after hoisting, the construction process is complicated, and the construction period is long. The above problems affect the application of the fabricated cement concrete pavement to a certain extent, and therefore, it is necessary to further explore the structural combination of the fabricated cement concrete pavement.
SUMMERY OF THE UTILITY MODEL
The utility model provides a beam foundation fabricated pavement structure, which solves the technical problems of high construction difficulty, long construction period, poor load transfer effect and concentrated stress of a pavement slab.
In order to solve the technical problems, the beam foundation fabricated pavement structure provided by the utility model comprises a roadbed and a subbase layer, wherein a plurality of groups of prefabricated cement concrete beams are solidified and bonded on the top of the subbase layer through cement mortar, each prefabricated cement concrete beam consists of two transverse prefabricated cement concrete beams and two longitudinal prefabricated cement concrete beams, a rubber pad is laid on the top of each group of prefabricated cement concrete beams, a pavement slab is arranged on the top of the rubber pad, a filling body is filled in the inner space of each group of prefabricated cement concrete beams and below the pavement slab, the top of the filling body is bonded with the bottom of the pavement slab, and the bottom of the pavement slab is in contact with the top of the prefabricated cement concrete beam below the filling body.
Preferably, the filling body is composed of a flexible filling layer at the bottom and a polyurethane foaming layer at the top.
Preferably, the material of the flexible filling layer is common cement mortar or CA mortar.
Preferably, the precast concrete girder is symmetrical in front and rear and left and right directions.
Preferably, the rubber pad comprises a transverse rubber pad and a longitudinal rubber pad, the horizontal section shape of the transverse rubber pad is matched with that of the transverse precast concrete beam, and the horizontal section shape of the longitudinal rubber pad is matched with that of the longitudinal precast concrete beam.
Preferably, one transverse precast concrete beam or longitudinal precast concrete beam in the two adjacent groups of precast concrete beams is a shared body.
Compared with the related art, the assembled pavement structure of the beam foundation provided by the utility model has the following beneficial effects:
1. in the utility model, each group of prefabricated cement concrete beams consists of two transverse prefabricated cement concrete beams and two longitudinal prefabricated cement concrete beams, the beams are formed in each group of prefabricated cement concrete beams, no connecting component is arranged between each prefabricated cement concrete beam, and the beams are stressed independently, compared with a connecting structure with a force transmission rod arranged in a traditional assembled pavement, the structure is simple, the construction efficiency can be greatly improved, and the construction period is shortened. In addition, the load is transmitted between the beam type base layer and the cement concrete pavement by means of compression and bending of the prefabricated cement concrete beam, and the effect that the load transmission capacity is similar in different temperature change environments in winter and summer can be achieved.
2. Through the structural combination of the precast cement concrete beam, the filler and the subbase layer, more stable support can be provided for the pavement slab, the fatigue resistance and the deformation resistance are excellent, the stress concentration phenomenon is controllable, and the probability of damage of the slab body caused by the temperature and load action is effectively reduced; in addition, because the corner of each road slab is supported by four independent beam structures, and the additional rubber pad between the road slab and the precast cement concrete beam can effectively fill and compact the existing tiny gap, the temperature buckling and void of the plate corner can be reduced, and the probability of damage to the plate corner is further reduced, because the contact area between the top of the filler and the road slab is larger, the void area of the road slab when the temperature buckling and deformation occurs under the temperature load effect can be obviously reduced, the buckling and void amount can be calculated according to the road surface nondestructive detection data and numerical simulation, the buckling and void amount of the beam-type base assembled cement concrete pavement can reach 40 percent compared with the optimized rate of the common assembled cement concrete pavement, and the cooperative deformation of the lower bearing layer structure and the road slab can be ensured by using the combination form of the flexible filling layer and the polyurethane foaming layer as the connecting layer, taking common cement mortar and CA mortar as examples, after the strength is formed, the drying shrinkage rate respectively reaches 0.1% and 0.04%, and the connection layer material has good elasticity and good self-expansibility under the condition that the grouting fullness degree under construction conditions cannot be completely guaranteed, so that the full contact with a pavement slab is guaranteed, the probability of void of an area except a beam structure at the lower part of the slab body is reduced to the maximum extent, the fatigue resistance and the deformation resistance are enhanced, and the stress concentration phenomenon of the pavement slab is reduced.
3. The structural rigidity of the beam-type base layer assembly type cement concrete pavement is integrally increased, and each structural layer can transmit load in a pressure mode; the method is characterized in that a water prefabricated cement concrete beam is arranged below a joint, the rigidity of the plate edge is increased, and meanwhile, good support is provided for the joint, so that a beam type base layer pavement structure with approximate equal rigidity is formed, the modulus of a flexible filler below a pavement slab is lower than that of a peripheral beam, the flexible filler has good elasticity, can cooperatively deform with the pavement slab under temperature load and keeps good contact with the pavement slab, and in numerical calculation of fatigue resistance, the bending tensile stress level of a common cement concrete pavement slab is integrally greater than that of a beam type base layer assembled cement concrete pavement; the maximum bending tensile stress level of the beam-type base layer assembly type cement concrete pavement slab is about 40%, the fatigue life of the pavement slab is calculated to be 4 hundred million times, the requirement of the extra-heavy traffic load grade is met, the maximum bending tensile stress level of the common cement concrete pavement slab is close to 50%, and the fatigue life of response is about 400 ten thousand times.
Drawings
FIG. 1 is an isometric view of a beam foundation fabricated decking structure in accordance with the utility model;
FIG. 2 is an isometric view of a precast concrete beam in a beam foundation fabricated decking structure according to the present invention;
FIG. 3 is a connecting shaft drawing of a precast concrete beam and rubber mats and a infill layer in an assembled decking structure for a beam foundation according to the present invention;
figure 4 is an isometric view of a infill layer in a beam foundation fabricated decking structure according to the utility model.
Reference numbers in the figures: 1. roadbed, 2, subbottom, 3, prefabricated cement concrete beam, 301, horizontal prefabricated cement concrete beam, 302, vertical prefabricated cement concrete beam, 4, filling body, 401, polyurethane foaming layer, 402, flexible filling layer, 5, road surface board, 6, rubber pad, 601, horizontal rubber pad, 602, vertical rubber pad.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1-4, the utility model provides a beam foundation fabricated pavement structure, which comprises a roadbed 1 and a sub-base layer 2, wherein a plurality of groups of prefabricated cement concrete beams 3 are solidified and bonded on the top of the sub-base layer 1 through cement mortar, each prefabricated cement concrete beam 3 consists of two transverse prefabricated cement concrete beams 301 and two longitudinal prefabricated cement concrete beams 302, a rubber pad 6 is laid on the top of each group of prefabricated cement concrete beams 3, a pavement slab 5 is arranged on the top of the rubber pad 6, a filling body 4 is filled in the inner space of each group of prefabricated cement concrete beams 3 and below the pavement slab 5, the top of the filling body 4 is bonded with the bottom of the pavement slab 5, and the bottom of the pavement slab 5 is in contact with the top of the prefabricated cement concrete beam 3 below the filling body.
According to the utility model, each group of prefabricated cement concrete beams 3 consists of two transverse prefabricated cement concrete beams 301 and two longitudinal prefabricated cement concrete beams 302, the beams are formed inside each group of prefabricated cement concrete beams 3, no connecting component is arranged between each prefabricated cement concrete beam 3, and the beams are stressed independently, compared with a connecting structure with a force transmission rod arranged in a traditional fabricated pavement, the structure is simple, the construction efficiency can be greatly improved, and the construction period is shortened, after the construction of the split frame beam provided by the utility model is finished, (each group of prefabricated cement concrete beams 3 consists of two transverse prefabricated cement concrete beams 301 and two longitudinal prefabricated cement concrete beams 302, and the two transverse prefabricated cement concrete beams 301 and the two longitudinal prefabricated cement concrete beams 302 are not connected with each other to be in a split state), the fabricated panel can be directly hoisted at a set pavement position after measurement, in addition, the load is transmitted between the beam type base layer and the cement concrete pavement by means of compression and bending of the prefabricated cement concrete beam, and the effect that the load transmission capacity is similar in different temperature change environments in winter and summer can be achieved.
Example two:
the filling body 4 is composed of a flexible filling layer 402 at the bottom and a polyurethane foaming layer 401 at the top.
The material of the flexible filling layer 402 is common cement mortar or CA mortar.
Through the structural combination of the precast cement concrete beam 3, the filler and the subbase layer 2, more stable support can be provided for the pavement slab 5, the fatigue resistance and the deformation resistance are excellent, the stress concentration phenomenon is controllable, and the probability of damage of the slab body caused by the action of temperature and load is effectively reduced, because the rigidity and the strength of the material of the precast cement concrete beam 3 are far higher than those of the filler (generally adopting a CA mortar layer) in the existing pavement structure, the probability of occurrence of 'top-down' and 'bottom-up' cracks of the pavement slab can be reduced; in addition, because the corners of each road slab 5 are supported by four independent beam structures, the rubber pads 6 between the road slab 5 and the precast cement concrete beams 3 can effectively fill and compact the existing tiny gaps, the temperature buckling and void of the slab corners can be reduced, and the probability of slab corner damage is further reduced, because the contact area between the top of the filler 4 and the road slab 5 is larger, the void area of the road slab 5 when the temperature buckling deformation occurs under the temperature load effect can be obviously reduced, according to the nondestructive testing data and numerical simulation calculation results of the road surface, the buckling and void amount of the beam-type base layer assembly type cement concrete road surface can reach 40 percent compared with the optimization rate of the common assembly type cement concrete road surface, and by using the combination form of the flexible filling layer 402 and the polyurethane layer 401 as the connecting layer, the cooperative deformation of the lower bearing layer structure and the road slab is ensured, taking common cement mortar and CA mortar as examples, the drying shrinkage rate respectively reaches 0.1% and 0.04% after forming the intensity, is limited under the condition that the grouting fullness degree of the construction conditions can not be completely guaranteed, the connecting layer material has good elasticity and good self-expansibility, and ensures the full contact with the pavement slab, thereby maximally reducing the probability of void of the lower part of the slab except the beam structure, enhancing the fatigue resistance and the deformation resistance, and reducing the stress concentration phenomenon of the pavement slab 3.
EXAMPLE III
The precast concrete beams 3 are symmetrical in the front-rear and left-right directions.
One transverse precast concrete beam 301 or longitudinal precast concrete beam 302 in two adjacent groups of precast concrete beams 3 is a common body.
The structural rigidity of the beam-type base layer assembly type cement concrete pavement is integrally increased, and each structural layer can transmit load in a pressure mode; the water precast cement concrete beam 3 is arranged below the joint, the rigidity of the plate edge is increased, and meanwhile, good support is provided for the joint, so that a beam type base layer pavement structure with approximate equal rigidity is formed, the modulus of a flexible filler below the pavement slab 5 is lower than that of a beam at the periphery, the flexible filler has good elasticity, the flexible filler can cooperatively deform with the pavement slab 5 under temperature load and keeps good contact with the pavement slab 5, and in the numerical calculation of the fatigue resistance, the bending tensile stress level of the common cement concrete pavement slab is integrally greater than that of a beam type base layer assembly type cement concrete pavement; the maximum bending tensile stress level of the beam-type base layer assembly type cement concrete pavement slab is about 40%, the fatigue life of the pavement slab is calculated to be 4 hundred million times, the requirement of the extra-heavy traffic load grade is met, the maximum bending tensile stress level of the common cement concrete pavement slab is close to 50%, and the fatigue life of response is about 400 ten thousand times.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A beam foundation fabricated decking structure including a sub-base (1) and a sub-base (2), characterised in that: the top of subbase (2) is solidified through cement mortar and is bonded and have a plurality of groups of precast cement concrete roof beams (3), precast cement concrete roof beam (3) is mixed earth roof beam (301) and two vertical precast cement by two horizontal precast cement and is mixed earth roof beam (302) and constitute, every group rubber pad (6) have been laid at the top of precast cement concrete earth roof beam (3), the top of rubber pad (6) is equipped with road deck board (5), every group the inside space of precast cement concrete roof beam (3) and the below that is located road deck board (5) are filled with obturator (4), the top of obturator (4) bonds with the bottom of road deck board (5), the bottom of road deck board (5) mixes roof beam (3) top contact with the precast cement that is located its below.
2. A beam foundation fabricated decking structure according to claim 1, wherein the infill (4) consists of a bottom flexible infill layer (402) and a top polyurethane foam layer (401).
3. A beam foundation fabricated decking structure according to claim 2, wherein the material of the flexible infill layer (402) is either portland cement mortar or CA mortar.
4. A beam foundation fabricated decking structure according to claim 1, wherein the precast concrete beams (3) are symmetrical in the front-to-rear and left-to-right directions.
5. The fabricated deck structure of claim 1, wherein the rubber pads (6) are composed of transverse rubber pads (601) and longitudinal rubber pads (602), and the horizontal cross-sectional shape of the transverse rubber pads (601) is matched with the horizontal cross-sectional shape of the transverse precast concrete beam (301), and the horizontal cross-sectional shape of the longitudinal rubber pads (602) is matched with the horizontal cross-sectional shape of the longitudinal precast concrete beam (302).
6. A beam foundation fabricated decking structure according to claim 1, wherein one transverse precast concrete beam (301) or one longitudinal precast concrete beam (302) of two adjacent sets of the precast concrete beams (3) is common.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122823136.0U CN216237936U (en) | 2021-11-17 | 2021-11-17 | Beam foundation assembled shop front structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122823136.0U CN216237936U (en) | 2021-11-17 | 2021-11-17 | Beam foundation assembled shop front structure |
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| Publication Number | Publication Date |
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| CN216237936U true CN216237936U (en) | 2022-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122823136.0U Active CN216237936U (en) | 2021-11-17 | 2021-11-17 | Beam foundation assembled shop front structure |
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| CN (1) | CN216237936U (en) |
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2021
- 2021-11-17 CN CN202122823136.0U patent/CN216237936U/en active Active
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