CN113463494A - Track beam and construction method thereof - Google Patents
Track beam and construction method thereof Download PDFInfo
- Publication number
- CN113463494A CN113463494A CN202010244807.5A CN202010244807A CN113463494A CN 113463494 A CN113463494 A CN 113463494A CN 202010244807 A CN202010244807 A CN 202010244807A CN 113463494 A CN113463494 A CN 113463494A
- Authority
- CN
- China
- Prior art keywords
- track beam
- track
- longitudinal
- longitudinal main
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2/00—General structure of permanent way
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a track beam and a construction method thereof, wherein the track beam comprises: the multi-section track beam section is sequentially arranged along the length direction of the track beam section, each section of track beam section comprises two longitudinal main beams and a plurality of cross connections, the two longitudinal main beams are arranged between the two longitudinal main beams at intervals in the width direction of the track beam section, and the plurality of cross connections are arranged at intervals along the length direction of the longitudinal main beams. According to the track beam, the cost can be greatly reduced, the transverse rigidity of the track beam section can be improved, and the track vehicle can be prevented from falling off from the two longitudinal main beams. In addition, through the track beam section that adopts above-mentioned structure, the track beam section is once only prefabricated in the mill, and construction convenience, and can improve construction quality, construction precision and production efficiency, reduce cost.
Description
Technical Field
The invention relates to the technical field of rail beam manufacturing, in particular to a rail beam and a construction method of the rail beam.
Background
In the related art, the track beam generally adopts a steel track beam structure or a concrete track beam structure. However, the steel track beam structure has the defects of high cost, poor durability, high operation and maintenance cost and the like, and the concrete track beam structure has heavy weight, so that the prefabricated concrete track beam has the defects of high transportation and hoisting difficulty, complex construction and the like.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention aims to provide a track beam, which reduces the weight of a track beam section, improves the durability of a product and reduces the cost of the product.
Another object of the present invention is to provide a construction method of a track beam.
The track beam according to an embodiment of the first aspect of the present invention includes: the multistage track roof beam section, the multistage track roof beam section is followed the length direction of track roof beam sets gradually, every section the track roof beam section includes two vertical girders and a plurality of cross-under, two vertical girder is in interval setting in the width direction of track roof beam section, every the cross-under is connected two between the vertical girder, it is a plurality of the cross-under is followed the length direction interval setting of vertical girder.
According to the track beam provided by the embodiment of the invention, the plurality of transverse connections are connected between the two longitudinal main beams, so that the transverse rigidity of the track beam section can be ensured, the weight of the whole track beam section is lighter, the track beam section is convenient to transport and hoist, the steel bars of the whole track beam are convenient to bind, and meanwhile, the light transmittance of the track beam section is good. In addition, through adopting the track beam section of above-mentioned structure, the track beam section can once only be prefabricated in the mill, and construction convenience, and can improve construction quality, construction accuracy and production efficiency, improve the durability of product, reduce cost.
According to some embodiments of the invention, each longitudinal main beam is provided, on the inside of its upper portion, with anti-disengagement means adapted to be stopped above the guide or stabilising wheels of a rail vehicle, so as to prevent the rail vehicle from coming out of both longitudinal main beams.
According to some embodiments of the invention, each of the longitudinal main beams is a solid concrete structure with a prestressed reinforcement embedded therein, and the middle part of the prestressed reinforcement is lower than both ends of the prestressed reinforcement.
According to some embodiments of the invention, the number of the prestressed reinforcements in each of the longitudinal girders is plural, the plurality of the prestressed reinforcements are arranged along the height direction of the longitudinal girders, and the distance between the end portions of two adjacent prestressed reinforcements is greater than the distance between the middle portions of two adjacent prestressed reinforcements.
According to some embodiments of the invention, the width of the crosspieces increases from the center towards the two longitudinal main beams.
According to some embodiments of the invention, both side surfaces in the width direction of the cross link are formed as circular arc surfaces.
According to some embodiments of the invention, each of the track beam segments is a linear track beam segment or a curved track beam segment.
According to some embodiments of the invention, the anti-drop device comprises: the embedded parts are arranged at intervals along the length direction of the track beam section, the outer end of each embedded part is arranged in the longitudinal main beam, and the inner end of each embedded part extends to exceed the inner side surface of the longitudinal main beam; the anti-falling plate is connected to the inner ends of the embedded parts.
According to some embodiments of the invention, the cross-ties are reinforced concrete structures.
According to some embodiments of the invention, an end face of each longitudinal main beam is formed as an inclined surface extending obliquely, and the inclination directions of the two end faces of each longitudinal main beam are the same, and the same end faces of the two longitudinal main beams are opposite to each other or away from each other.
According to some embodiments of the invention, further comprising a support member fixed to the cross-bar, an upper space of the support member defining an evacuation channel.
The construction method of the track beam according to the embodiment of the second aspect of the invention comprises the following steps: arranging two longitudinal beam molds arranged side by side, and arranging a plurality of transverse connection molds arranged at intervals along the length direction of the longitudinal beam molds between the two longitudinal beam molds, wherein a longitudinal beam mold cavity is defined in each longitudinal beam mold, a transverse connection mold cavity is defined in each transverse connection mold, and the plurality of transverse connection mold cavities are communicated with the two longitudinal beam mold cavities; arranging a plurality of first reinforcing steel bars in each longitudinal beam die cavity, and arranging a plurality of second reinforcing steel bars in each transverse connection die cavity; concrete is poured into the two longitudinal beam die cavities in which the first reinforcing steel bars are arranged and the transverse die cavities in which the second reinforcing steel bars are arranged; tensioning the first steel bars to obtain prestressed steel bars; after the concrete is solidified, removing the two longitudinal beam molds and the plurality of transverse connection molds to obtain a track beam section; the rail beam is formed by splicing a plurality of rail beam sections along the length direction.
According to some embodiments of the invention, before the concrete is poured, a plurality of embedded parts which are arranged at intervals along the length direction of the longitudinal beam mold are respectively arranged on the sides of the two longitudinal beam molds, which are opposite to each other.
According to some embodiments of the invention, after the track beam section is obtained, anti-drop plates are welded to free ends of the embedded parts of the same longitudinal main beam of the track beam section.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a front view of a track beam according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a track beam according to an embodiment of the present invention;
FIG. 3 is another cross-sectional view of a track beam according to an embodiment of the present invention;
fig. 4 is a schematic view of the arrangement of a plurality of prestressed reinforcements within a rail beam according to an embodiment of the present invention;
fig. 5 is a sectional view of a plurality of prestressed reinforcements arranged at the end of a rail beam according to an embodiment of the present invention;
fig. 6 is a sectional view illustrating arrangement of a plurality of prestressed reinforcements at the middle portion of a rail beam according to an embodiment of the present invention;
FIG. 7 is a transverse cross-sectional view of a rail beam according to an embodiment of the present invention;
FIG. 8 is another transverse cross-sectional view of a rail beam according to an embodiment of the present invention;
fig. 9 is a schematic view of a rail beam and a rail vehicle according to an embodiment of the present invention.
Reference numerals:
100: a track beam section;
1: a longitudinal main beam; 11: pre-stressing the steel bars; 12: hoisting holes;
2: transverse connection; 21: a second reinforcing bar;
3: an anti-drop device; 31: embedding parts; 32: an anti-drop plate;
4: a base, 5: a support member;
200: a rail vehicle; 201: a running wheel; 202: a guide wheel.
Detailed Description
Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.
A track beam according to an embodiment of the invention is described below with reference to fig. 1-9.
As shown in fig. 1 to 9, the track beam according to the embodiment of the first aspect of the present invention includes a multi-segment track beam segment 100.
Specifically, multistage track beam section 100 is suitable for and sets gradually along the length direction of track roof beam, and every section track beam section 100 includes two vertical girders 1 and a plurality of horizontal antithetical couplet 2, and two vertical girders 1 interval sets up on the width direction of track beam section 100, and every horizontal antithetical couplet 2 is connected between two vertical girders 1, and a plurality of horizontal antithetical couplet 2 interval sets up along the length direction of vertical girder 1.
For example, in the example of fig. 1 to 4, a plurality of track beam segments 100 may be sequentially disposed along the length direction of the track beam, two longitudinal main beams 1 may be disposed at intervals in the width direction of the track beam, the two longitudinal main beams 1 are connected by a plurality of transverse links 2, and the plurality of transverse links 2 are disposed at intervals along the length direction of the longitudinal main beams 1. By the arrangement, the rigidity of the track beam section 100 can be further increased, the transverse rigidity of the whole track beam section 100 can be effectively ensured, and meanwhile, compared with a concrete track beam in the related technology, the weight of the whole track beam is greatly reduced, so that the track beam section 100 is convenient to transport and hoist, the steel bar binding amount of the whole track beam is also greatly reduced, the steel bar binding of the transverse connection 2 is facilitated, the construction process difficulty is further reduced, the quality of the track beam is improved, the using amounts of concrete, steel bars and the like are reduced, the cost is reduced, and the light transmittance of the track beam section is good; compared with a steel track beam in the related technology, the manufacturing cost is low, the durability is good, and the deformation of the track beam section 100 in the later-stage operation process is effectively reduced, so that the riding comfort can be further ensured, and the later-stage corrosion, deformation and other maintenance operation work is reduced.
Optionally, the distance between two adjacent transverse links 2 is d, where d satisfies: d is more than or equal to 2m and less than or equal to 3 m. Therefore, the distance d between two adjacent transverse links 2 is set to be not less than 2m and not more than 3m, so that the track beam section 100 can be ensured to have higher rigidity, the number of the transverse links 2 can be reduced, and the cost can be reduced.
According to the track beam provided by the embodiment of the invention, the plurality of transverse links 2 are connected between the two longitudinal main beams 1, so that the transverse rigidity of the track beam section 100 is ensured, the weight of the whole track beam is reduced, the light transmittance is good, in addition, the track beam section 100 adopting the track beam section 100 with the structure is formed in a one-step pouring mode in a factory, the construction is convenient, the construction quality, the construction precision and the production efficiency can be improved, the durability of a product is good, and the cost is reduced.
According to some embodiments of the present invention, the upper inner side of each longitudinal main beam 1 is provided with a retaining device 3, and the retaining device 3 is adapted to be disposed above the guide wheels 202 or stabilizing wheels of the railway vehicle 200 to prevent the railway vehicle 200 from being released from the two longitudinal main beams 1. Here, it should be noted that the direction "in" is understood to be towards the direction between the two longitudinal main beams 1, and vice versa "out", i.e. away from the direction between the two longitudinal main beams 1.
Referring to fig. 5, 6 and 7 in combination with fig. 9, the two longitudinal main beams 1 are provided at upper portions of two sides opposite to each other with the anti-drop devices 3, the rail vehicle 200 rides on the rail beams, and the running wheels 201 at two sides of the rail vehicle 200 in the width direction respectively run on the two longitudinal main beams 1, at this time, the anti-drop devices 3 are adapted to be disposed above the guide wheels 202 or the stabilizing wheels of the rail vehicle 200, so that the rail vehicle 200 can be well prevented from dropping off from the two longitudinal main beams 1.
According to some embodiments of the present invention, as shown in fig. 4 to 6, each longitudinal girder 1 is a solid concrete structure with built-in prestressed reinforcement 11. Two vertical girder 1 are solid construction, and every vertical girder 1's inside is equipped with prestressed reinforcement 11, compares with the roof beam body of cavity core structure in the correlation technique, and prestressed reinforcement 11 need not to dodge the hollow portion, reduces construction process's the degree of difficulty by a wide margin, and in addition, the walking face antiskid effect of track roof beam is better, need not to set up special anti-skidding structure or skid resistant course.
Referring to fig. 4 to 6, the middle portion of the prestressed reinforcement 11 is lower than both ends of the prestressed reinforcement 11, in other words, the middle portion of the prestressed reinforcement 11 is bent downward with respect to both ends of the prestressed reinforcement 11. For example, the middle portion of the prestressed reinforcement 11 is close to the bottom of the longitudinal main beam 1, and the two ends of the prestressed reinforcement 11 are relatively close to the top of the longitudinal main beam 1. Specifically, when the track beam is manufactured, tensile force is applied to the prestressed tendons 11 at two ends of the track beam, the middle parts of the prestressed tendons 11 move upwards under the action of the tensile force, so that the middle parts of the longitudinal main beams 1 are protruded upwards, and the gravity of the track beam and the pressure generated by second-stage constant load are offset, therefore, the rigidity and the durability of the longitudinal main beams 1 can be greatly improved, the span can be improved under the condition of ensuring the size of the track beam, the arrangement quantity of supports, piers and pile foundations of the track beam with the same mileage is reduced, meanwhile, the track beam basically does not need to be maintained within the design service life, the operation cost is greatly reduced, and the riding comfort is greatly improved.
According to some alternative embodiments of the present invention, referring to fig. 4, there are a plurality of prestressed reinforcements 11 in each longitudinal main beam 1, and the plurality of prestressed reinforcements 11 are arranged at intervals along the height direction of the longitudinal main beam 1. In the description of the present invention, "a plurality" means two or more. From this, through set up a plurality of prestressing steel 11 along the direction of height interval of vertical girder 1, can further effectively guarantee the rigidity and the durability of vertical girder 1, prolong the life of track roof beam.
Further, referring to fig. 4 in conjunction with fig. 5 and 6, the distance between the ends of two adjacent prestressed reinforcements 11 is greater than the distance between the middle portions of two adjacent prestressed reinforcements 11. So set up, guarantee effectively that vertical girder 1 satisfies the required atress requirement of design to guarantee vertical girder 1's rigidity.
According to some alternative embodiments of the present invention, the weight of each section of track beam section 100 is below 50t, and the length of each section of track beam section 100 is below 25 m. Therefore, when the strength and the rigidity of the two ends 100 of the track are ensured, the track beam section 100 can be prefabricated conveniently, the cost can be reduced, the condition that the track beam section 100 is overweight and overlong in the transportation process can be avoided, and the transportation of the track beam section 100 is facilitated.
According to some embodiments of the invention, each longitudinal main beam has a length L, a width W, and a height H, wherein L, W, H respectively satisfy: l is more than or equal to 15m and less than or equal to 25m, W is more than or equal to 1.5m and less than or equal to 2.5m, and H is more than or equal to 1.2m and less than or equal to 2 m. By the arrangement, the weight of each track beam section 100 can be effectively ensured to be below 50t, and the transportation of the track beam sections 100 is facilitated.
According to some embodiments of the invention, the width of the crosspieces 2 increases gradually from the center towards the two longitudinal main beams 1. For example, referring to fig. 2 and 3, the width of the middle of the cross-section 2 is the smallest, and the width of the cross-section 2 at the connection with the two longitudinal main beams 1 is the largest. Therefore, the contact area between the two ends of the cross beam 2 and the two longitudinal main beams 1 is large, the connection strength between the cross beam 2 and the two longitudinal main beams 1 can be improved, and the rigidity of the whole track beam section 100 can be better ensured.
In some alternative embodiments, as shown in fig. 2 and 3, both side surfaces in the width direction of the cross link 2 are formed as circular arc surfaces. From this, formed the long type hole that both ends are the circular arc between two adjacent horizontal antithetical couplets 2, so set up, whole track roof beam's atress is more scientific, and structural strength and rigidity are better, and simple structure is pleasing to the eye moreover, and processing is convenient to can reduce cost. Alternatively, both ends of the cross-member 2 may be symmetrical about the central longitudinal plane of the cross-member 2, but is not limited thereto.
According to some embodiments of the present invention, referring to fig. 1-4, each section of track beam segment 100 is a linear track beam segment or a curvilinear track beam segment. For example, the track beam section 100 is a linear track beam section, and the track beam section 100 may extend linearly along the length direction of the track beam. Of course, the present invention is not limited thereto. As shown in fig. 2, 3 and 4, the track beam section 100 may also be a curved track beam section, in which case the track beam section 100 extends in a curve. So, then can realize the whole prefabrication of track roof beam straightway and curve section, also the track roof beam of various circuit forms all can be prefabricated by whole mill, construction convenience, and the precision and the quality of track roof beam are easily guaranteed, have improved the efficiency of construction simultaneously.
According to some embodiments of the present invention, when the track beam section 100 is a curved track beam section, the minimum curve radius of the track beam section 100 is 100 m. From this, guaranteed effectively that track beam section 100 can once only be prefabricated in the mill, construction convenience can effectively improve construction quality and construction precision, guarantees track beam section 100's production efficiency simultaneously, can effectively reduce cost.
According to some embodiments of the present invention, the anti-slip device 3 includes a plurality of embedded parts 31 and anti-slip plates 32, the plurality of embedded parts 31 are arranged at intervals along the length direction of the track beam section 100, the outer end of each embedded part 31 is embedded in the longitudinal main beam 1, the inner end of each embedded part 31 extends to exceed the inner side surface of the longitudinal main beam 1, and the anti-slip plates 32 are connected to the inner ends of the plurality of embedded parts 31. For example, as shown in fig. 3, a plurality of embedded parts 31 may be disposed at regular intervals in the length direction of the track beam section 100, and the embedded parts 31 on the two longitudinal main beams 1 may correspond to each other one by one, one end of each embedded part 31 extends into the longitudinal main beam 1 and is located on the upper portion of the longitudinal main beam 1, the other end of each embedded part 31 extends out of the inner side surface of the track beam section 100, and the anti-separation plate 32 is connected between the other ends of the embedded parts 31.
Therefore, on one hand, while the anti-derailing device 3 is used for protecting the rail vehicle 200 to avoid the derailing phenomenon of the rail vehicle 200, the steel consumption can be greatly reduced, for example, 75% can be saved. Optionally, one embedded part 31 may be embedded every 500mm in the length direction of the track beam section 100, and both the embedded part 31 and the anti-drop plate 32 may be made of Q355B steel, where the Q355B steel is carbon steel with yield strength of 355 MPa; on the other hand, because anticreep device 3 includes the built-in fitting 31 that a plurality of intervals set up and sets up in the anticreep board 32 of the inner of a plurality of built-in fittings 31 for track beam section 100 can once pour the shaping, and the construction is simple and convenient, and anticreep device 3 and track beam section 100's firm in connection, can prevent rail vehicle 200's derail phenomenon more reliably.
According to some embodiments of the invention, the cross-ties 2 are reinforced concrete structures. As shown in fig. 8, a plurality of second reinforcing bars 21 are arranged in a staggered manner, and then concrete is poured to ensure the structural strength and stability of the transverse link 2. Alternatively, the plurality of second steel bars 21 may be HPB300 steel bars and HRB400 steel bars, respectively, where the HPB300 steel bars are hot-rolled plain steel bars with a yield strength of 300MPa, and the HRB400 steel bars are hot-rolled ribbed steel bars with a yield strength of 400 MPa.
According to some embodiments of the invention, the end face of each longitudinal main beam 1 is formed as an inclined surface extending obliquely, and the inclination directions of the end faces of both ends of each longitudinal main beam 1 are the same, and the same end faces of two longitudinal main beams 1 are opposite to each other or away from each other. Referring to fig. 2 and 3, the end surface of the same side in the length direction of the two longitudinal main beams 1 of the track beam section 100 may be formed as a slope extending obliquely from outside to inside in the direction away from the center of the longitudinal main beam 1, and the end surface of the other side in the length direction of the two longitudinal main beams 1 of the track beam section 100 may be formed as a slope extending obliquely from inside to outside in the direction away from the center of the longitudinal main beam 1. From this, through setting up the same direction of slope of the both ends terminal surface of every vertical girder 1, the opposite direction of slope of the terminal surface of the same end of two vertical girders 1 sets up, when two sections track beam sections 100 are connected, can effectively guarantee that two sections track beam sections 100 carve to close together, the area that two sections track beam sections 100 carve to close has been increased, thereby both can satisfy the requirement of the flexible deformation of track beam section 100, can guarantee again that two sections track beam sections 100 can restrict the displacement each other, make the deformation of track beam section 100 within the scope of requirement, need not to set up the expansion joint structure, the cost is saved, and construction convenience.
According to some embodiments of the present invention, as shown in fig. 2 and 3, the rail beam further includes a support 5, the support 5 is fixed to the cross-member 2, and an upper space of the support 5 defines an evacuation passage. For example, a support 5 can be connected above the transverse link 2, and the support 5 and the two longitudinal main beams 1 jointly define an evacuation channel therebetween. From this, through setting up support piece 5, the maintainer can walk on support piece 5 to be convenient for overhaul the track roof beam, if when rail vehicle 200 broke down, the passenger can evacuate through evacuation passageway simultaneously. Alternatively, the supporting member 5 may be a steel wire mesh or a steel grating, and of course, the form of the supporting member 5 may be limited according to the specific use case, and is not limited herein.
According to some embodiments of the present invention, the two ends of each longitudinal main beam 1 are respectively formed with a lifting hole 12. The lifting holes 12 facilitate lifting and installation during transportation of the rail beam section 100. As shown in fig. 1-3, two ends of the longitudinal main beam 1 are respectively provided with a circular hoisting hole 12, and the circular hoisting holes 12 are convenient to process.
Optionally, the bases 4 may be respectively disposed at bottoms of two ends of the track beam section 100, and the stability of installation of the track beam section 100 is ensured by disposing the bases 4.
According to the track beam of the embodiment of the invention, the track beam section 100 is a prestressed reinforced concrete structure, and the track beam section 100 adopting the prestressed reinforced concrete structure has the following effects: (1) the track beam section 100 is light in weight, convenient to transport and hoist and greatly reduced in cost; (2) the durability of the track beam section 100 is greatly improved, so that the track beam section 100 basically does not need to be maintained within the design service life, and the operation cost is greatly reduced; (3) the track beam section 100 can be prefabricated in a factory at one time, construction is convenient, and construction precision, construction speed and construction quality are improved; (4) the rigidity of the track beam section 100 is effectively improved, the deformation of the longitudinal main beam 1 is reduced, and the riding comfort is improved.
The construction method of the track beam according to the embodiment of the second aspect of the invention comprises the following steps:
arranging two longitudinal beam molds arranged side by side, and arranging a plurality of transverse connection molds arranged at intervals along the length direction of the longitudinal beam molds between the two longitudinal beam molds, wherein a longitudinal beam mold cavity is defined in each longitudinal beam mold, a transverse connection mold cavity is defined in each transverse connection mold, and the plurality of transverse connection mold cavities are communicated with the two longitudinal beam mold cavities;
a plurality of first reinforcing steel bars are arranged in each longitudinal beam die cavity, and a plurality of second reinforcing steel bars 21 are arranged in each transverse connection die cavity;
pouring concrete into two longitudinal beam die cavities with a plurality of first steel bars arranged inside and a plurality of transverse die cavities with a plurality of second steel bars 21 arranged inside;
tensioning the first plurality of rebars to obtain a plurality of prestressed rebars 11;
after the concrete is solidified, removing the two longitudinal beam molds and the plurality of cross connection molds to obtain a track beam section 100;
the plurality of track beam sections 100 are spliced into a track beam along the length direction.
According to the construction method of the track beam provided by the embodiment of the invention, the track beam section 100 can be subjected to processes of concrete pouring, form removal, prestressed reinforcement tensioning and anchoring, pipeline grouting, end sealing and the like in the manufacturing process. Wherein, the concrete pouring process can adopt a continuous pouring mode so as to form the track beam section 100 at one time. Specifically, the concrete entry temperature should not exceed 30 ℃ during concrete pouring, and the temperature difference of the concrete during concrete pouring should not be more than 15 ℃. The strength of the concrete in the form removal process is more than 75% of the design strength, the temperature difference between the concrete core part and the surface layer of the longitudinal girder 1 and the temperature difference between the surface layer and the environment are not more than 15 ℃, and the integrity of the edges of the longitudinal girder 1 is ensured. After the end die is removed, the longitudinal beam die and the transverse connection die are loosened, the longitudinal main beam 1 is initially tensioned, and the longitudinal beam die and the transverse connection die can be removed after the longitudinal main beam 1 is initially tensioned. Here, it should be noted that the form should not be removed when the temperature changes rapidly, the form should be removed when the temperature is high in winter, and the concrete should be maintained after the form is removed to prevent the concrete from shrinkage cracks. Alternatively, the longitudinal girders 1 may be made of C60 concrete.
In the process of tensioning and anchoring the prestressed reinforcement 11, secondary tensioning is adopted for tensioning the prestressed reinforcement 11, and the tensioning is carried out according to two stages of initial tensioning and final tensioning. The concrete strength of the longitudinal main beam 1 during initial tensioning needs to reach more than 75%, the longitudinal main beam 1 can be lifted out of a platform after initial tensioning, and the concrete elastic modulus of the longitudinal main beam 1 during initial tensioning needs to reach 3.45 multiplied by 10 MPa. And the final tension is performed after the age of the concrete of the longitudinal girder 1 is not less than 14 days and the strength and elastic modulus of the concrete of the longitudinal girder 1 reach design values. The prestressed reinforcement 11 can be tensioned in a manner of synchronously tensioning two ends, and the tensioning is performed in a bilateral symmetry manner, so that the maximum unbalanced beam can not exceed 1 beam. In addition, the prestressed reinforcement tensioning adopts double control measures, the tensioning force is taken as the main measure, the elongation of the prestressed reinforcement 11 is checked, and the elongations of two ends of the prestressed reinforcement 11 are basically consistent in the tensioning process of the prestressed reinforcement 11. Corresponding measures are taken during the tensioning of the prestressed reinforcement 11 to prevent the anchorage device and the prestressed reinforcement 11 from being drenched by rainwater and water for maintenance, so that the anchorage device and the prestressed reinforcement 11 are prevented from being corroded. Alternatively, the prestressed reinforcement 11 may be a high-strength low-relaxation prestressed strand with a diameter of 15.2, and the prestressed reinforcement 11 tensioning system may be a jack.
After the final tension stage is complete, the track beam section 100 is preferably pipe grouted within 48 hours. The temperature of the longitudinal main beam 1 and the ambient temperature are not lower than 5 ℃ during and within 3 hours after pipeline grouting. Before grouting, high-grade cement slurry is used for sealing the hole of the anchor, and impurities and accumulated water in the pipeline are removed. When the pipeline is pressed, the cement paste pressed into the pipeline is full and dense, and the time interval from the end of stirring the cement paste to the pressing into the pipeline is not more than 40 min. In addition, heat preservation measures should be taken when the pipeline is grouted in winter. Optionally, the grouting material may adopt a high-performance non-shrinkage anti-corrosion grouting agent, the prestressed steel pipe in the longitudinal main beam 1 adopts a pre-embedded metal corrugated pipe forming mode, the anchor may adopt a clip type group anchor system, and the cement slurry for sealing the anchor pore may adopt dry and hard compensation shrinkage concrete.
And finally, carrying out an end sealing process, wherein the end sealing filling process can adopt fine aggregate concrete so as to ensure that the end sealing concrete is connected with the longitudinal main beam 1 into a whole, and carrying out antirust treatment on anchorage devices such as an anchor head, an anchor backing plate and the like. And performing chiseling treatment on the anchor groove before end sealing, performing waterproof treatment after end sealing, and brushing waterproof paint on the outer side of the anchor groove.
According to some embodiments of the present invention, before the concrete is poured, a plurality of embedded parts 32 are provided at intervals in the longitudinal direction of the stringer mold on the sides of the two stringer molds opposite to each other, respectively. From this, make a plurality of built-in fittings 32 can connect into a whole with track beam section 100 through concreting for the shaping can be once poured along with track beam section 100 to a plurality of built-in fittings 32 of anticreep device 3, and the construction is more simple and convenient, and has improved the reliability of being connected of anticreep device 3 and track beam section 100.
Further, after the track beam section 100 is obtained, the anti-dropping plates 31 are welded to the free ends of the embedded parts 32 of the same longitudinal main beam 1 of the track beam section 100. Thus, the retaining plate 31 can integrally connect the plurality of embedded parts 32, and the connection strength of the retaining device 3 including the plurality of embedded parts 32 and the retaining plate 31 is improved.
Other constructions and operations of the track beam according to embodiments of the invention are known to those skilled in the art and will not be described in detail herein.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (14)
1. A track beam, comprising:
the multistage track roof beam section, the multistage track roof beam section is suitable for the edge the length direction of track roof beam sets gradually, every section the track roof beam section includes two vertical girders and a plurality of cross-under, two vertical girder is in interval setting in the width direction of track roof beam section, every the cross-under is connected two between the vertical girder, it is a plurality of the cross-under is followed the length direction interval setting of vertical girder.
2. The track beam according to claim 1, wherein each longitudinal main beam is provided with an anti-slip device on the inner side of the upper portion, the anti-slip device is suitable for being stopped above guide wheels or stabilizing wheels of a railway vehicle so as to prevent the railway vehicle from being pulled out of the two longitudinal main beams.
3. The track beam defined in claim 1, wherein each longitudinal main beam is a solid concrete structure with a prestressed reinforcement embedded therein, the central portion of the prestressed reinforcement being lower than the ends of the prestressed reinforcement.
4. The track beam of claim 3, wherein the number of the prestressed reinforcements in each of the longitudinal girders is plural, the plurality of the prestressed reinforcements are arranged along the height direction of the longitudinal girders, and the distance between the end portions of two adjacent prestressed reinforcements is greater than the distance between the middle portions of two adjacent prestressed reinforcements.
5. The track beam of claim 1, wherein the width of the cross-links increases from the center in a direction toward the two longitudinal main beams.
6. The track beam according to claim 5, wherein both side surfaces in the width direction of the cross link are formed as circular arc surfaces.
7. The track beam of claim 1, wherein each of the track beam segments is a linear track beam segment or a curvilinear track beam segment.
8. The track beam of claim 1, wherein the anti-separation means comprises:
the embedded parts are arranged at intervals along the length direction of the track beam section, the outer end of each embedded part is arranged in the longitudinal main beam, and the inner end of each embedded part extends to exceed the inner side surface of the longitudinal main beam;
the anti-falling plate is connected to the inner ends of the embedded parts.
9. The track beam defined in claim 1 wherein the cross-ties are reinforced concrete structures.
10. The track beam according to claim 1, wherein the end face of each longitudinal main beam is formed as an inclined surface extending obliquely, and the inclination directions of the end faces of each longitudinal main beam are the same, and the same end faces of the two longitudinal main beams are opposite to each other or away from each other.
11. The track beam according to claim 1, further comprising a support fixed to the cross-bar, an upper space of the support defining an evacuation channel.
12. A construction method of a track beam is characterized by comprising the following steps:
arranging two longitudinal beam molds arranged side by side, and arranging a plurality of transverse connection molds arranged at intervals along the length direction of the longitudinal beam molds between the two longitudinal beam molds, wherein a longitudinal beam mold cavity is defined in each longitudinal beam mold, a transverse connection mold cavity is defined in each transverse connection mold, and the plurality of transverse connection mold cavities are communicated with the two longitudinal beam mold cavities;
arranging a plurality of first reinforcing steel bars in each longitudinal beam die cavity, and arranging a plurality of second reinforcing steel bars in each transverse connection die cavity;
concrete is poured into the two longitudinal beam die cavities in which the first reinforcing steel bars are arranged and the transverse die cavities in which the second reinforcing steel bars are arranged;
tensioning the first steel bars to obtain prestressed steel bars;
after the concrete is solidified, removing the two longitudinal beam molds and the plurality of transverse connection molds to obtain a track beam section;
the rail beam is formed by splicing a plurality of rail beam sections along the length direction.
13. The construction method of a track beam according to claim 12, wherein a plurality of embedments are provided at intervals in a longitudinal direction of the side member molds on opposite sides of the two side member molds, respectively, before the concrete is poured.
14. The method of constructing a track beam according to claim 13, wherein after the track beam section is obtained, an anti-separation plate is welded to free ends of the embedded parts of the same longitudinal main beam of the track beam section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010244807.5A CN113463494B (en) | 2020-03-31 | 2020-03-31 | Track beam and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010244807.5A CN113463494B (en) | 2020-03-31 | 2020-03-31 | Track beam and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113463494A true CN113463494A (en) | 2021-10-01 |
| CN113463494B CN113463494B (en) | 2022-12-09 |
Family
ID=77865554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010244807.5A Active CN113463494B (en) | 2020-03-31 | 2020-03-31 | Track beam and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113463494B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113737581A (en) * | 2020-05-29 | 2021-12-03 | 比亚迪股份有限公司 | Track beam and manufacturing method thereof and design method of track beam |
| CN114687448A (en) * | 2022-06-02 | 2022-07-01 | 清华大学 | Transfer beam, building structure and construction method |
| CN118110063A (en) * | 2024-02-02 | 2024-05-31 | 中国建筑第五工程局有限公司 | Lightweight steel-concrete combined track beam structure and design method |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000230205A (en) * | 1999-02-09 | 2000-08-22 | Shimizu Corp | Elevated track construction method and device |
| JP2006327559A (en) * | 2005-05-23 | 2006-12-07 | Toshikatsu Hino | Derailment and overturning prevention device for railway rolling stock |
| CN104213477A (en) * | 2014-09-22 | 2014-12-17 | 中铁工程设计咨询集团有限公司 | Straddle type single-track double-box rectangular steel-concrete composite track beam structure |
| CN104480810A (en) * | 2014-12-11 | 2015-04-01 | 中铁第四勘察设计院集团有限公司 | Medium-and-low speed magnetic levitation railway low route continuous framework type bearing rail beam structure and construction method |
| CN106994977A (en) * | 2016-09-21 | 2017-08-01 | 比亚迪股份有限公司 | Rail Transit System |
| CN109208456A (en) * | 2017-06-30 | 2019-01-15 | 比亚迪股份有限公司 | Pre-track beam and straddle type rail transit system for straddle-type rail vehicle |
| CN109208405A (en) * | 2017-06-30 | 2019-01-15 | 比亚迪股份有限公司 | Pre-track beam and straddle type rail transit system for straddle-type rail vehicle |
| CN208762797U (en) * | 2018-05-21 | 2019-04-19 | 比亚迪股份有限公司 | Track girder and Rail Transit System |
| CN209010948U (en) * | 2018-09-20 | 2019-06-21 | 比亚迪股份有限公司 | Track girder and Rail Transit System |
| CN109972539A (en) * | 2017-12-28 | 2019-07-05 | 比亚迪股份有限公司 | The maintenance platform of rail traffic |
-
2020
- 2020-03-31 CN CN202010244807.5A patent/CN113463494B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000230205A (en) * | 1999-02-09 | 2000-08-22 | Shimizu Corp | Elevated track construction method and device |
| JP2006327559A (en) * | 2005-05-23 | 2006-12-07 | Toshikatsu Hino | Derailment and overturning prevention device for railway rolling stock |
| CN104213477A (en) * | 2014-09-22 | 2014-12-17 | 中铁工程设计咨询集团有限公司 | Straddle type single-track double-box rectangular steel-concrete composite track beam structure |
| CN104480810A (en) * | 2014-12-11 | 2015-04-01 | 中铁第四勘察设计院集团有限公司 | Medium-and-low speed magnetic levitation railway low route continuous framework type bearing rail beam structure and construction method |
| CN106994977A (en) * | 2016-09-21 | 2017-08-01 | 比亚迪股份有限公司 | Rail Transit System |
| CN109208456A (en) * | 2017-06-30 | 2019-01-15 | 比亚迪股份有限公司 | Pre-track beam and straddle type rail transit system for straddle-type rail vehicle |
| CN109208405A (en) * | 2017-06-30 | 2019-01-15 | 比亚迪股份有限公司 | Pre-track beam and straddle type rail transit system for straddle-type rail vehicle |
| CN109972539A (en) * | 2017-12-28 | 2019-07-05 | 比亚迪股份有限公司 | The maintenance platform of rail traffic |
| CN208762797U (en) * | 2018-05-21 | 2019-04-19 | 比亚迪股份有限公司 | Track girder and Rail Transit System |
| CN209010948U (en) * | 2018-09-20 | 2019-06-21 | 比亚迪股份有限公司 | Track girder and Rail Transit System |
Non-Patent Citations (1)
| Title |
|---|
| 杨新斌: "《中低速磁浮交通技术》", 31 May 2017 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113737581A (en) * | 2020-05-29 | 2021-12-03 | 比亚迪股份有限公司 | Track beam and manufacturing method thereof and design method of track beam |
| CN114687448A (en) * | 2022-06-02 | 2022-07-01 | 清华大学 | Transfer beam, building structure and construction method |
| CN114687448B (en) * | 2022-06-02 | 2022-09-02 | 清华大学 | Transfer beam, building structure and construction method |
| CN118110063A (en) * | 2024-02-02 | 2024-05-31 | 中国建筑第五工程局有限公司 | Lightweight steel-concrete combined track beam structure and design method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113463494B (en) | 2022-12-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113463494B (en) | Track beam and construction method thereof | |
| CN210562056U (en) | Adjustable continuous four-rod self-adaptive drawing die for overflow surface curved surface concrete construction | |
| CN213038218U (en) | Predictive continuous rigid frame bridge capable of supplementing tensioning prestress | |
| CN110700113B (en) | Construction method of prestress applying device of non-prestressed beam bridge | |
| CN110700119A (en) | Upper traveling system of assembled Bailey beam hanging basket and design method thereof | |
| CN114808722A (en) | Construction method of cable-stayed bridge reinforced concrete main beam | |
| CN210262507U (en) | Track slab structure for climbing | |
| CN111485500A (en) | Transverse lengthening reinforcing construction method and structure for retreating and dismantling of rhombic hanging basket | |
| KR100454406B1 (en) | Method and apparatus for changing steel bridge of supporting rail into concrete bridge using temporary bent | |
| CN111206488A (en) | Large-span widened corrugated web steel box-concrete continuous beam bridge and construction method | |
| CN114016370A (en) | 'hysteresis type' narrow steel box composite beam and construction method thereof | |
| KR100592196B1 (en) | large number bracket in which supporter was installed is used and it is a bridge, multiplex point installed so that support might be carried out support bracket and its installation method | |
| CN210262719U (en) | Longitudinal connecting plate beam structure | |
| CN110524675B (en) | Pre-tensioning prefabricated I-beam and construction method thereof | |
| CN210657995U (en) | Rail plate girder construction system | |
| CN111042004A (en) | Hanging basket track beam traveling method | |
| RU2373317C2 (en) | Prestressed reinforced concrete slab for railway roads | |
| CN108978490B (en) | Construction method of continuous beam-arch combined beam body and continuous beam-arch combined beam body | |
| CN214737289U (en) | Mounting structure for assembled elevated road and bridge | |
| CN211772949U (en) | Top-span existing line steel longitudinal beam pushing and mounting system | |
| KR20060017949A (en) | Field-fabricated prestressing steel-composed girder and construction method of continuous bridge using the girder | |
| JP3950284B2 (en) | Method for reinforcing concrete slabs | |
| CN210395127U (en) | Assembled Bailey beam hanging basket upper walking system | |
| CN2911000Y (en) | Continuous combined bridge girder bridge | |
| CN212270680U (en) | Steel-concrete composite beam concrete bridge deck slab capable of being constructed quickly and hoisting system thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |