CN111636256A - Roadbed structure of straddle type monorail low-lying line and construction method thereof - Google Patents
Roadbed structure of straddle type monorail low-lying line and construction method thereof Download PDFInfo
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- CN111636256A CN111636256A CN202010591783.0A CN202010591783A CN111636256A CN 111636256 A CN111636256 A CN 111636256A CN 202010591783 A CN202010591783 A CN 202010591783A CN 111636256 A CN111636256 A CN 111636256A
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- 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
- E01B2/006—Deep foundation of tracks
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B25/00—Tracks for special kinds of railways
- E01B25/08—Tracks for mono-rails with centre of gravity of vehicle above the load-bearing rail
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
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Abstract
The invention provides a roadbed structure of a straddle type monorail low-lying line and a construction method thereof, wherein the roadbed structure comprises a plurality of piers and a plurality of supporting pieces, wherein the piers are used for supporting a track beam of a straddle type monorail; and a supporting part is arranged between two adjacent abutments of the same track beam, the supporting part is supported at the bottom of the track beam, and the track beam can be separated from the support of the supporting part. The pier and the supporting piece of the roadbed structure simultaneously bear the load of the track beam and the train on the upper portion of the track beam and transmit the load to the stratum, and meanwhile, the supporting piece can control the deformation of the track beam, and the structure is stable and reliable. Compared with an overhead structure, the roadbed structure provided by the invention has the advantages that the bridge occupation ratio is reduced, the construction period is shortened, and the investment cost is obviously reduced.
Description
Technical Field
The invention relates to the technical field of straddle type monorail traffic engineering, in particular to a roadbed structure of a straddle type monorail low-level line and a construction method thereof.
Background
The straddle type monorail is a novel rail transit which is supported, stabilized and guided by a rail beam, and a vehicle body rides on the rail beam to run. The straddle type monorail traffic engineering is built and operated in many places in China due to the advantages of small occupied area, strong climbing and curve capacity, small noise, small landscape influence, large building density adaptability and the like. The straddle type monorail is an important choice for urban rail transit construction, the construction strength of the straddle type monorail is continuously expanded, but the straddle type monorail is mainly in an overhead form basically, the construction cost is high, and the maintenance and the repair are difficult. Therefore, it is necessary to research a roadbed structure of a straddle type monorail low-lying line.
Disclosure of Invention
The invention aims to provide a roadbed structure of a straddle type monorail low-lying line and a construction method thereof, and aims to solve the technical problems that a straddle type monorail in the prior art is mainly overhead, high in manufacturing cost and difficult to maintain.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the invention provides a roadbed structure of a straddle type monorail low-lying line, which comprises a plurality of piers and a plurality of supporting pieces, wherein the piers are used for supporting a track beam of a straddle type monorail; the supporting piece is arranged between every two adjacent abutments of the same track beam, the supporting piece is supported at the bottom of the track beam, and the track beam can be separated from the supporting piece.
Further, a groove is formed on the support, and the bottom of the track beam is wedged into the groove.
Further, the support comprises an auxiliary beam and a connecting plate arranged on the auxiliary beam, the auxiliary beam is laid below the track beam, and a groove is formed in the connecting plate to be wedged into the track beam.
Further, the auxiliary beam is arranged perpendicular to the extending direction of the track beam; and/or grooves are formed at two ends of the connecting plate along the direction perpendicular to the track beams respectively and used for wedging the two track beams.
Furthermore, one supporting piece is arranged between every two adjacent abutments, and the supporting piece is positioned between the two abutments.
Furthermore, the lower part of the support member is buried in the ground, and the thickness of the support member buried in the ground is 1/4-1 of the thickness of the support member.
Further, the pier comprises a bearing platform, a support and a plurality of cast-in-situ bored piles, wherein the cast-in-situ bored piles are used for supporting the bearing platform, the support is arranged on the bearing platform and is fixedly connected with the track beam to support the track beam, the top ends of the cast-in-situ bored piles are supported on the bearing platform, and the bottom ends of the cast-in-situ bored piles penetrate through the weak stratum and then stretch into the bearing layer.
Furthermore, the bearing platform is perpendicular to the extending direction of the track beam, the number of the supporting seats is multiple, and the supporting seats are distributed on the bearing platform at intervals to support the track beams.
Furthermore, the lower part of the bearing platform is embedded in the ground, and the thickness of the bearing platform embedded in the ground is 1/4-1 of the thickness of the bearing platform.
According to another aspect of the invention, a method for constructing a roadbed structure of the straddle type monorail overhead line is further provided, and the method comprises the following steps: constructing a plurality of piers, and arranging the plurality of piers at intervals along the extending direction of the track beam and supporting the plurality of piers at the end part of the track beam; fixedly connecting the plurality of abutments with the bottoms of the track beams respectively; and constructing a plurality of supporting pieces, uniformly arranging the supporting pieces between two adjacent abutments of the same track beam, and detachably supporting the supporting pieces at the bottom of the track beam.
Further, the step of constructing a plurality of abutments to arrange the plurality of abutments at intervals along the extending direction of the rail beam and to support the plurality of abutments on the end of the rail beam specifically includes: constructing a plurality of cast-in-situ bored piles, wherein the cast-in-situ bored piles are arranged at intervals, and one end, far away from the track beam, of each cast-in-situ bored pile penetrates through the weak stratum and extends into the bearing layer; constructing a bearing platform at the top ends of the plurality of cast-in-situ bored piles, fixing the bearing platform on the plurality of cast-in-situ bored piles, and reserving the positions of the supports on the bearing platform; constructing the support at a reserved position on the bearing platform, and fixedly connecting the support with the track beam to complete the construction of a single pier; and repeating the steps to finish the construction of the plurality of piers, and arranging the plurality of piers at intervals along the extending direction of the track beam.
The invention provides a roadbed structure of a straddle type monorail low-lying line.A pier supporting track beam is respectively arranged at two end parts of a track beam and fixedly connected with the pier supporting track beam, and a supporting piece is arranged between two adjacent piers of the same track beam and detachably supported at the bottom of the track beam; the pier and the supporting piece simultaneously bear the load of the track beam and the train on the upper portion of the track beam and transmit the load to the ground, and meanwhile, the supporting piece can control deformation of the track beam, and the structure is stable and reliable. Compared with an overhead structure, the roadbed structure provided by the invention has the advantages that the bridge occupation ratio is reduced, the construction period is shortened, and the investment cost is obviously reduced.
Drawings
Fig. 1 is a schematic cross-sectional structural view of a roadbed structure of a straddle-type monorail low-level line provided by the embodiment of the invention, wherein a track beam and a train are shown;
fig. 2 is a schematic longitudinal sectional view of a roadbed structure of a straddle-type monorail low-lying line provided by the embodiment of the invention, wherein a track beam is shown;
FIG. 3 is a schematic structural view of the support shown in FIG. 2;
fig. 4 is a flowchart of a construction method of a roadbed structure according to an embodiment of the present invention.
Description of reference numerals:
10. a track beam; 20. a train; 50. a weak formation; 60. a support layer; 70. side ditches;
30. pier abutment; 31. a bearing platform; 32. a support; 33. drilling a cast-in-place pile;
40. a support member; 41. an auxiliary beam; 42. a connecting plate; 42a, grooves.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. In the description of the present invention, the relevant orientation or positional relationship is based on the orientation or positional relationship shown in fig. 1, where "up" and "down" refer to the up-down direction of fig. 1. It is to be understood that such directional terms are merely used to facilitate describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must be constructed and operated in a particular orientation and therefore should not be considered as limiting the invention.
Referring to fig. 1 and 2, in a first aspect of the embodiments of the present application, there is provided a roadbed structure of a straddle-type monorail low-lying line, comprising a plurality of abutments 30 and a plurality of supporting members 40 for supporting a track beam 10 of a straddle-type monorail, wherein the plurality of abutments 30 are arranged at intervals along an extending direction of the track beam 10, and the abutments 30 are supported at an end portion of the track beam 10 and are fixedly connected with a bottom portion of the track beam 10; a support 40 is disposed between two adjacent abutments 30 of the same rail beam 10, the support 40 is supported on the bottom of the rail beam 10, and the rail beam 10 can be separated from the support of the support 40.
The roadbed structure of this application embodiment lays a plurality of abutments 30 along the extending direction of track roof beam 10, and abutments 30 set up and support track roof beam 10 in the both ends of track roof beam 10, and abutments 30 and the bottom fixed connection of track roof beam 10 are in order to improve the stability of being connected between the two. The plurality of abutments 30 are used for bearing the load of the track beam 10 and the train 20 on the track beam and transmitting the load into the ground layer, so that the reliability of the roadbed structure of the straddle type monorail low-level line is higher. In some embodiments, the abutments 30 are only supported at the junction of two adjacent track beams 10, that is, one abutment 30 is provided at the junction of two adjacent track beams 10 for supporting, so that the number of abutments 30 can be reduced, the construction period can be shortened, and the construction cost of the roadbed structure can be reduced while the support is provided for the track beams 10.
In addition, on the same track beam 10, a supporting member 40 is disposed between two adjacent abutments 30, and the supporting member 40 is supported on the bottom of the track beam 10 similarly to the abutments 30. Different from the above, on one hand, the supporting positions of the supporting members 40 and the abutments 30 on the track beam 10 are different, the abutments 30 are supported at the end parts of the track beam 10, and the supporting members 40 are positioned between two adjacent abutments 30 to support the track beam 10 in an auxiliary manner, so that partial load of the track beam 10 can be borne, and the deformation of the track beam 10 can be well controlled; on the other hand, the support of the bearing 40 to the track beam 10 is a detachable support, i.e. the bearing 40 is not fixedly connected with the track beam 10, so as to meet the stress requirement of the track beam 10.
In the roadbed structure of the straddle-type monorail low-lying line provided by the embodiment of the application, the abutments 30 are respectively arranged at the two end parts of the track beam 10 to support the track beam 10 and fixedly connect the abutments 30 with the track beam 10, the supporting member 40 is arranged between two adjacent abutments 30 of the same track beam 10, and the supporting member 40 can be detachably supported at the bottom of the track beam 10; the abutment 30 and the support member 40 simultaneously bear the load of the track beam 10 and the train 20 on the track beam and transmit the load into the ground, and the support member 40 can control the deformation of the track beam 10, so that the structure is stable and reliable. Compare in the structure of overhead form, the roadbed structure of this application embodiment has reduced the bridge and has taken up a percentage, has shortened the time limit for a project, is showing to have reduced investment cost.
It will be appreciated that the non-fixed connection between the support 40 and the track beam 10 can be in many ways. In some embodiments, a groove 42a is formed in the support 40 and the bottom of the track beam 10 is wedged into the groove 42 a. The grooves 42a of the support members 40 restrain the lateral displacement of the track beam 10, thereby improving the lateral rigidity of the track beam 10, and at the same time, controlling the deformation of the track beam 10 well, thereby improving the stability of the track beam 10.
Wherein the support member 40 may be a unitary structure or a combination of a plurality of structures. Referring to fig. 3, in some embodiments, the support 40 includes an auxiliary beam 41, a connection plate 42 disposed on the auxiliary beam 41, the auxiliary beam 41 being laid under the track beam 10, and a groove 42a formed on the connection plate 42 to wedge the track beam 10. It is to be understood that the auxiliary beams 41 and the connecting plates 42 may be cast with concrete on site or prefabricated in advance. The connection plate 42 forms a groove 42a at the top end thereof when casting or prefabricating for wedging the track girder 10, and particularly, the bottom end of the track girder 10 is wedged into the bottom end of the groove 42a, thereby supporting and laterally limiting the track girder 10, improving the lateral rigidity of the track girder 10, controlling the deformation of the track girder 10, and improving the stability of the roadbed. The connection plate 42 is disposed on the ground layer through the auxiliary beam 41, and the auxiliary beam 41 plays a role of transferring load and also serves to support the connection plate 42.
In the embodiment of the present application, the auxiliary beam 41 is laid below the track beam 10, and further, the auxiliary beam 41 is laid perpendicular to the extending direction of the track beam 10. The connecting plate 42 is disposed on the auxiliary beam 41, and the auxiliary beam 41 is perpendicular to the extending direction of the track beam 10, so as to better provide support for the track beam 10. Further, both ends of the connecting plate 42 in a direction perpendicular to the track beam 10 are respectively formed with a groove 42a for wedging the two track beams 10. That is, two track beams 10 are wedged into each support 40, that is, each support 40 spans under two track beams 10, and two grooves 42a are formed in the connecting plate 42, and the grooves 42a are respectively disposed at both ends of the connecting plate 42 in a direction perpendicular to the track beams 10. Each auxiliary beam 41 and the connecting plate 42 support two track beams 10, so that construction is simplified, construction period is shortened, and manufacturing cost is reduced.
It is understood that one or more supporting members 40 may be disposed between two adjacent abutments 30 of the same rail girder 10. In some embodiments, a support member 40 is disposed between two adjacent abutments 30, and the support member 40 is located in the middle of the two abutments 30. It can be understood that, since the two ends of the rail beam 10 are respectively supported by the abutments 30, the middle of the rail beam has a greater tendency to deform, and therefore, the support members 40 are supported at the most easily deformable positions of the rail beam 10, so that the deformation of the rail beam 10 can be better controlled, and the stability thereof can be improved.
In the embodiment of the present application, the supporting member 40 may be cast in situ directly on the ground or the prefabricated member may be directly placed on the ground, or may be cast in situ in the ground or the prefabricated member may be buried in the ground. In some embodiments, the lower portion of support member 40 is embedded in the formation, and the thickness of support member 40 embedded in the formation is 1/4-1 times the thickness of support member 40. That is, the support 40 may be partially or entirely buried in the ground, so that the stability of the support 40 may be further improved, and the effect of controlling the deformation of the track beam 10 may be enhanced.
In the embodiment of the present application, whether or not the abutment 30 is provided with the pile foundation depends on a specific stratum structure, and when the stratum structure is a hard rock or other stratum capable of providing a strong bearing capacity, the pile foundation does not need to be provided; when the stratum structure is a weak stratum 50, a pile foundation needs to be arranged. In some embodiments, the abutment 30 includes a bearing platform 31, a support 32 and a plurality of cast-in-situ piles 33 for supporting the bearing platform 31, the support 32 is disposed on the bearing platform 31 and is fixedly connected to the track beam 10 to support the track beam 10, the plurality of cast-in-situ piles 33 are supported on the bearing platform 31 at top ends thereof, and extend into the bearing stratum 60 after penetrating through the weak stratum 50 at bottom ends thereof.
In the embodiment of the present application, the bearing platform 31 and the plurality of cast-in-situ bored piles 33 supporting the bearing platform 31 may be integrally cast, and the reinforced concrete structure formed by the two directly bears the load of the track beam 10 and the train 20 on the upper portion thereof, and transmits the load to the stable bearing layer 60, so that the reliability of the roadbed structure is higher. Wherein, the bearing platform 31 well disperses the load of the track beam 10 and the train 20 on the upper part thereof, and uniformly transmits the load to the plurality of cast-in-situ bored piles 33, thereby avoiding structural damage caused by uneven settlement. A plurality of bored concrete piles 33 stretch into to stable holding power layer 60 in, when the road bed produced and subsided, pile foundation and cushion cap 31 structure still can provide stronger bearing capacity, avoided because of the difficult uneven settlement that causes of control of construction quality, made the structural rigidity and the stability of road bed all better.
In some embodiments, the bearing platform 31 is perpendicular to the extending direction of the track beam 10, the number of the supporting seats 32 is multiple, and the multiple supporting seats 32 are arranged on the bearing platform 31 at intervals to support multiple track beams 10. It can be understood that a plurality of supports 32 can be disposed on each bearing platform 31 to support a plurality of track beams 10, and the bearing platforms 31 can well disperse the load of the plurality of track beams 10 and uniformly transmit the load to the plurality of cast-in-situ bored piles 33, so as to avoid structural damage caused by uneven settlement. In the embodiment of the present application, the number of the supports 32 is 2, that is, 2 track beams 10 are arranged on each bearing platform 31 at intervals.
In the embodiment of the present application, the cap 31 may be disposed on the ground, or may be partially or completely buried in the ground. In some embodiments, the lower portion of the platform 31 is buried in the ground, and the thickness of the platform 31 buried in the ground is 1/4-1 of the thickness of the platform 31. It can be understood that the bearing platform 31 may be partially or completely embedded in the ground, which can further improve the stability of the bearing platform 31 and enhance the supporting effect on the track beam 10 and the load dispersing effect.
Referring to fig. 4, in a second aspect of the embodiments of the present application, there is provided a method for constructing a roadbed structure of the straddle-type monorail low-level line, including the following steps: s1, constructing a plurality of abutments 30, and arranging the abutments 30 at intervals along the extending direction of the track beam 10 and supporting the abutments on the end of the track beam 10; s2, fixedly connecting the plurality of abutments 30 with the bottom of the track beam 10 respectively; s3, constructing a plurality of supporting members 40, such that the supporting members 40 are uniformly arranged between two adjacent abutments 30 of the same track beam 10, and the supporting members 40 are detachably supported on the bottom of the track beam 10.
In the embodiment of the present application, the abutments 30 are respectively disposed at the two end portions of the track beam 10, and the abutments 30 are fixedly connected to the track beam 10, so that the track beam 10 can be better supported, and the load of the track beam 10 and the upper train 20 thereof is transmitted to the ground, thereby improving the structural reliability. In addition, the support members 40 are provided between two adjacent abutments 30 of the same track beam 10, so that the deformation of the track beam 10 can be controlled while the partial load of the track beam 10 is borne, thereby improving the stability of the roadbed structure. The support member 40 is detachably coupled to the rail beam 10, and satisfies a stress requirement of the rail beam 10 while controlling deformation of the rail beam 10. The construction method of the roadbed structure reduces the construction of bridges, shortens the construction period and obviously reduces the investment cost.
In some embodiments, the step of constructing the plurality of abutments 30 to arrange the plurality of abutments 30 at intervals along the extending direction of the track beam 10 and support the plurality of abutments 30 at the end of the track beam 10 specifically includes: constructing a plurality of cast-in-situ bored piles 33, wherein the cast-in-situ bored piles 33 are arranged at intervals, and one end of each cast-in-situ bored pile 33, which is far away from the track beam 10, penetrates through the weak stratum 50 and extends into the bearing layer 60; constructing a bearing platform 31 at the top ends of the plurality of cast-in-situ bored piles 33, fixing the bearing platform 31 on the plurality of cast-in-situ bored piles 33, and reserving the position of the support 32 on the bearing platform 31; constructing a support 32 at a reserved position on the bearing platform 31, and fixedly connecting the support 32 with the track beam 10 to complete the construction of a single abutment 30; and repeating the steps to complete the construction of the plurality of abutments 30, so that the plurality of abutments 30 are arranged at intervals along the extending direction of the track beam 10.
In the embodiment of the present application, the cast-in-situ bored piles 33 and the corresponding bearing platforms 31 may be integrally cast. The reinforced concrete structure formed by the plurality of cast-in-situ bored piles 33 and the corresponding bearing platforms 31 directly bears the load of the track beam 10 and the upper train 20, and the integrally cast structure has better bearing capacity; and the load can be transmitted to the stable bearing layer 60 through the cast-in-situ bored pile 33, and the reliability of the structure is high. Meanwhile, the construction bored pile 33 extends into the bearing layer 60, and when the subgrade is settled, the pile foundation bearing platform 31 structure still can provide strong bearing capacity, so that the uneven settlement caused by the difficulty in controlling the construction quality is avoided, and the structural rigidity and the stability are better. In addition, a support 32 is constructed on the top of the bearing platform 31, the bearing platform 31 is fixedly connected with the track beam 10 through the support 32, and the load of the track beam 10 and the upper train 20 is transmitted to the bearing platform 31 through the support 32, so that the overall stability of the track beam 10 is improved. Wherein, the thickness of the constructed bearing platform 31 is generally 80 cm-120 cm. It will be appreciated that the constructed platform 31 is disposed on or buried in the earth formation. Whether or not the cap 31 is buried in the ground is determined according to the structure of the ground and the specific thickness of the cap 31.
In some embodiments, construction support 40 is cast-in-place or pre-fabricated and a groove 42a is formed on support 40 for wedging rail beam 10. The prefabrication is carried out in advance by placing the prefabricated member on or in the ground and detachably supporting the bearing member 40 from the rail beam 10. In the present embodiment, the bottom of the rail beam 10 is wedged into the groove 42a of the bearing 40, thereby realizing the detachable support between the rail beam 10 and the bearing 40.
Specifically, the construction method of the roadbed structure in the embodiment of the application comprises the following steps:
1. firstly, side slope excavation and site leveling are carried out, and necessary side slope protection is carried out according to design.
2. Side ditches 70 are respectively constructed on two sides of the position where the abutment 30 is to be constructed so as to ensure smooth drainage in construction and reduce the influence of rainfall on the proposed field area.
3. The construction of a plurality of cast-in-situ bored piles 33 is carried out, the specific construction process is determined by the surrounding environment of the field of view, the pile diameter, the pile spacing and the reinforcing bars are required according to the design drawing, and the bottom end of the pile foundation penetrates through the weak stratum 50 and extends into the stable bearing layer 60.
4. The construction method comprises the steps of constructing a bearing platform 31, supporting a formwork, integrally pouring concrete, and reserving a position of a support 32 on the bearing platform 31. And after the construction of the bearing platform 31 is completed, the template is removed. In this embodiment, the cap 31 is directly constructed on the ground.
5. The construction supporting member 40, the formwork, the auxiliary beam 41 of the supporting member 40 and the connecting plate 42 are cast in situ at the same time, and the connecting plate 42 is provided with a groove 42 a. And after the construction is finished, removing the template. In this embodiment, support 40 is constructed directly on the formation.
6. After the cast-in-situ bored pile 33, the bearing platform 31 and the support member 40 are placed for a concrete setting period of not less than 28 days and strength requirements are met, the support 32 and the track beam 10 are both cast in situ, the support 32 and the track beam 10 are fixedly connected, and the bottom end of the track beam 10 is wedged into the groove 42a of the connecting plate 42.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention, and all such changes or substitutions are included in the scope of the present invention. Moreover, the technical solutions in the embodiments of the present invention may be combined with each other, but it is necessary to be able to be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent, and is not within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (11)
1. The utility model provides a stride roadbed structure of a formula monorail low circuit of putting which characterized in that: the device comprises a plurality of abutments and a plurality of supporting pieces, wherein the abutments are used for supporting a track beam of the straddle type monorail and are arranged at intervals along the extending direction of the track beam, and the abutments are supported at the end part of the track beam and are fixedly connected with the bottom of the track beam; the supporting piece is arranged between every two adjacent abutments of the same track beam, the supporting piece is supported at the bottom of the track beam, and the track beam can be separated from the supporting piece.
2. The roadbed structure of claim 1, wherein the support members are formed with grooves, and the bottom of the track beams are wedged into the grooves.
3. The roadbed structure of claim 2, wherein the support member comprises an auxiliary beam, a connection plate provided on the auxiliary beam, the auxiliary beam being laid under the track beam, and a groove formed on the connection plate to wedge the track beam.
4. The roadbed structure of claim 3, wherein the auxiliary beams are arranged perpendicular to the extending direction of the track beams; and/or
Grooves are formed in the two ends, perpendicular to the direction of the track beams, of the connecting plate respectively and used for wedging the two track beams.
5. The roadbed structure of claim 1, wherein one of the supporting members is arranged between two adjacent abutments, and the supporting member is positioned between the two abutments.
6. The roadbed structure according to any one of claims 1 to 5, wherein the lower part of the support member is buried in the ground, and the thickness of the support member buried in the ground is 1/4 to 1 of the thickness of the support member.
7. The roadbed structure of any one of claims 1 to 5, wherein the pier comprises a bearing platform, a support and a plurality of cast-in-situ bored piles for supporting the bearing platform, the support is arranged on the bearing platform and is fixedly connected with the track beam to support the track beam, the top ends of the plurality of cast-in-situ bored piles are supported on the bearing platform, and the bottom ends of the plurality of cast-in-situ bored piles penetrate through the weak stratum and then extend into the bearing stratum.
8. The roadbed structure of claim 7, wherein the bearing platform is perpendicular to the extending direction of the track beam, the number of the support bases is multiple, and the plurality of the support bases are arranged on the bearing platform at intervals to support the plurality of track beams.
9. The roadbed structure of claim 7, wherein the lower part of the bearing platform is buried in the ground, and the thickness of the bearing platform buried in the ground is 1/4-1 of the thickness of the bearing platform.
10. A roadbed structure construction method, which is used for constructing the roadbed structure of the straddle-type monorail low-lying line of any one of claims 1 to 9, and comprises the following steps:
constructing a plurality of piers, and arranging the plurality of piers at intervals along the extending direction of the track beam and supporting the plurality of piers at the end part of the track beam;
fixedly connecting the plurality of abutments with the bottoms of the track beams respectively;
and constructing a plurality of supporting pieces, uniformly arranging the supporting pieces between two adjacent abutments of the same track beam, and detachably supporting the supporting pieces at the bottom of the track beam.
11. The method for constructing a roadbed structure according to claim 10, wherein the step of constructing a plurality of piers so that the plurality of piers are arranged at intervals along the extending direction of the track beam and supported at the end of the track beam specifically comprises:
constructing a plurality of cast-in-situ bored piles, wherein the cast-in-situ bored piles are arranged at intervals, and one end, far away from the track beam, of each cast-in-situ bored pile penetrates through the weak stratum and extends into the bearing layer;
constructing a bearing platform at the top ends of the plurality of cast-in-situ bored piles, fixing the bearing platform on the plurality of cast-in-situ bored piles, and reserving the positions of the supports on the bearing platform;
constructing the support at a reserved position on the bearing platform, and fixedly connecting the support with the track beam to complete the construction of a single pier;
and repeating the steps to finish the construction of the plurality of piers, and arranging the plurality of piers at intervals along the extending direction of the track beam.
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| CN202010591783.0A CN111636256A (en) | 2020-06-24 | 2020-06-24 | Roadbed structure of straddle type monorail low-lying line and construction method thereof |
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| CN202010591783.0A CN111636256A (en) | 2020-06-24 | 2020-06-24 | Roadbed structure of straddle type monorail low-lying line and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113931013A (en) * | 2021-10-22 | 2022-01-14 | 中铁第六勘察设计院集团有限公司 | Railway cylinder foundation beam plate type structure and design method thereof |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113931013A (en) * | 2021-10-22 | 2022-01-14 | 中铁第六勘察设计院集团有限公司 | Railway cylinder foundation beam plate type structure and design method thereof |
| CN113931013B (en) * | 2021-10-22 | 2023-09-15 | 中铁第六勘察设计院集团有限公司 | Railway barrel base beam plate type structure and design method thereof |
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