CN111636257A - Turnout foundation structure of straddle type single-rail low-mounted line and construction method thereof - Google Patents
Turnout foundation structure of straddle type single-rail low-mounted line and construction method thereof Download PDFInfo
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- CN111636257A CN111636257A CN202010622755.0A CN202010622755A CN111636257A CN 111636257 A CN111636257 A CN 111636257A CN 202010622755 A CN202010622755 A CN 202010622755A CN 111636257 A CN111636257 A CN 111636257A
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- turnout
- bearing
- cast
- foundation structure
- situ bored
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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
-
- 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
- E01B25/10—Mono-rails; Auxiliary balancing rails; Supports or connections for rails
-
- 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
Abstract
The invention provides a turnout foundation structure of a straddle type monorail low-lying line and a construction method thereof, wherein the turnout foundation structure comprises a plurality of abutments for supporting a turnout beam, and the abutments are arranged at intervals along the length direction of the turnout beam; the pier comprises a bearing assembly for bearing the turnout beam and a plurality of cast-in-situ bored piles for supporting the bearing assembly, wherein the bottom ends of the cast-in-situ bored piles penetrate through the weak stratum and then extend into the bearing layer, and the top ends of the cast-in-situ bored piles are supported at the bottom ends of the bearing assembly. The turnout foundation structure can be used in a section with a limited site, the pier structure is flexible in design, and each pier can be designed according to the characteristics and stress conditions of the section at different positions; the bearing assembly of each abutment and the plurality of cast-in-situ bored piles form a rigid bearing structure to bear the pressure, the tension, the bending moment and the torque transmitted by the rotation of the turnout beam, and the cast-in-situ bored piles penetrate through a weak stratum and then extend into a bearing layer to reduce the deformation of the turnout beam in the rotation process, ensure the rigidity of the turnout foundation structure and meet the requirement of long-term stability.
Description
Technical Field
The invention relates to the technical field of straddle type monorail traffic engineering, in particular to a turnout foundation structure of a straddle type monorail low-level line and a construction method thereof.
Background
The straddle type single rail mainly takes an overhead structure, the track change of the train is realized by a turnout beam and a track supporting beam of a low-positioned line connected with the turnout beam, the turnout beam is integrally connected with the track supporting beam in the same direction after rotating for a certain angle, but the rotation of the turnout beam easily causes the uneven deformation of the lower foundation of the turnout beam, and the normal track change and the riding comfort of the train are influenced when the deformation is serious. The measures taken in the prior art are mostly to place the turnout foundation structure in a section with relatively high and uniform foundation rigidity so as to meet the stability requirement of the turnout foundation structure, but the turnout foundation structure cannot keep long-term stability usually, and meanwhile, a large amount of maintenance and repair cost is also needed.
Disclosure of Invention
The invention provides a turnout foundation structure of a straddle type monorail low-lying line and a construction method thereof, and aims to solve the technical problem that the turnout foundation structure in the prior art is unstable or not lasting in stability.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the invention provides a turnout foundation structure of a straddle type monorail low-lying line, which comprises a plurality of abutments for supporting a turnout beam, wherein the abutments are distributed at intervals along the length direction of the turnout beam; the pier is including bearing the load-bearing component and the support of switch roof beam a plurality of drilling bored concrete piles of load-bearing component, the bottom of drilling bored concrete pile stretches into the holding power layer after passing weak stratum, the top support in the bottom of load-bearing component.
Furthermore, the bearing assembly comprises a bearing platform arranged at the top end of the cast-in-situ bored pile and a boss fixed on the bearing platform, and the top end of the boss bears the turnout beam; the projection area of the boss in the horizontal plane is smaller than that of the bearing platform in the horizontal plane.
Furthermore, the lower part of the bearing platform is buried in the ground; and/or a connecting bolt is embedded at the top of the boss.
Further, the cast-in-situ bored pile is connected with the bearing platform through a steel bar; and/or the bearing platform is connected with the boss through a steel bar.
Further, switch foundation structure still includes the concrete cushion, the concrete cushion set up in the bored concrete pile with between the bearing component.
Further, the projected area of the concrete cushion layer in the horizontal plane is larger than the projected area of the bearing assembly in the horizontal plane.
According to another aspect of the present invention, there is provided a construction method of a turnout foundation structure, which is applied to the turnout foundation structure, and includes the following steps:
s1, constructing a plurality of cast-in-situ bored piles, wherein the cast-in-situ bored piles are distributed at intervals, and one end, far away from the turnout beam, of each cast-in-situ bored pile penetrates through the weak stratum and extends into the bearing layer;
s2, constructing a bearing assembly at the top ends of the plurality of cast-in-situ bored piles, so that the bearing assembly is fixed on the plurality of cast-in-situ bored piles, and the construction of a single abutment is completed;
and S3, repeating the step S1 to the step S2, and manufacturing a plurality of abutments arranged at intervals.
Further, the step S2 specifically includes: constructing a concrete cushion layer at the top ends of the cast-in-situ bored piles, and fixing the concrete cushion layer on the cast-in-situ bored piles; and constructing a bearing platform of the bearing assembly on the concrete cushion layer, constructing a boss of the bearing assembly at the top end of the bearing platform, and completing construction of a single pier.
Further, the step S1 is preceded by the following steps: and excavating a construction platform, wherein the depth of the construction platform is 1/4-3/4 of the thickness of the bearing platform of the bearing assembly.
Further, the step S1 further includes: embedding steel bars at the top of the cast-in-situ bored pile to connect the bearing assembly; and/or said step S2 further comprises: and embedding a connecting bolt at the top of the bearing component.
The turnout foundation structure of the straddle type monorail low-lying line, provided by the invention, has the advantages that the plurality of abutments are distributed at intervals for commonly bearing turnout beams, the turnout foundation structure can be used in a section with a limited site, the abutments are flexible in structural design, and each abutment can be respectively designed according to the characteristics and stress conditions of the sections at different positions; in addition, each pier comprises a bearing component and a plurality of cast-in-situ bored piles, the bearing component and the cast-in-situ bored piles form a rigid bearing structure to bear pressure, tension, bending moment and torque transmitted by the rotation of the turnout beam, and the cast-in-situ bored piles penetrate through a weak stratum and then extend into a bearing layer, so that the deformation of the turnout beam in the rotation process can be reduced, the rigidity of the turnout foundation structure is ensured, and the requirement of long-term stability of the turnout foundation structure is met.
Drawings
Fig. 1 is a schematic longitudinal section view of a turnout foundation structure of a straddle-type monorail low-lying line provided by the embodiment of the invention;
FIG. 2 is a top view of a turnout foundation structure of a straddle-type monorail low-lying line provided by an embodiment of the invention;
fig. 3 is a flowchart of a construction method of a turnout foundation structure provided by an embodiment of the present invention.
Description of reference numerals:
10. pier abutment; 11. drilling a cast-in-place pile; 12. a bearing platform; 13. a boss; 14. a concrete cushion; 15. a connecting bolt; 20. a weak formation; 30. a support layer.
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 related orientation or positional relationship is based on the orientation or positional relationship shown in fig. 1, wherein "top" and "bottom" refer to the top-bottom 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 turnout foundation structure of a straddle-type monorail low-lying line, including a plurality of abutments 10 for supporting a turnout beam, the abutments 10 being arranged at intervals along a length direction of the turnout beam; the abutment 10 comprises a bearing assembly for bearing the turnout beam and a plurality of cast-in-situ bored piles 11 for supporting the bearing assembly, wherein the bottom ends of the cast-in-situ bored piles 11 penetrate through the weak stratum 20 and then extend into the bearing layer 30, and the top ends of the cast-in-situ bored piles are supported at the bottom ends of the bearing assembly.
The switch foundation structure of this application embodiment lays a plurality of abutments 10 at the below interval of switch roof beam and is used for bearing the switch roof beam, and the switch roof beam is laid in order on a plurality of abutments 10. Specifically, referring to fig. 2, the number of abutments 10, the spacing between adjacent abutments 10, and the size of the abutments 10 may be selected according to the force to be applied and the number and size of the switch beams. For example, fig. 2 shows a three-throw turnout structure, the number of the abutments 10 is 3, the number of the turnout beams can be 1 or 2, and each turnout beam spans three abutments 10 laid below the turnout beam. Understandably, the bearing capacity that each abutment 10 needs to provide to the switch beam can be calculated according to the installation site of the abutment 10 and the difference condition of pressure, pulling force, bending moment and torque transmitted by the rotation of the switch beam, and the multiple abutments 10 can realize independent bearing capacity adjustment, are flexible and simple to construct, have strong controllability, and can respectively ensure the rigidity of the abutments 10 so as to ensure the long-term stability of the switch beam. In addition, the pier 10 comprises a bearing assembly and a plurality of cast-in-situ bored piles 11, the bearing assembly and the cast-in-situ bored piles 11 form a rigid bearing structure to bear pressure, tension, bending moment and torque transmitted by the rotation of the turnout beam, and the cast-in-situ bored piles 11 penetrate through the weak stratum 20 and then extend into the bearing layer 30, so that the deformation of the turnout beam in the rotation process can be reduced, the rigidity of the turnout foundation structure is ensured, and the requirement of long-term stability of the turnout foundation structure is met.
The turnout foundation structure is applied to a straddle type single-rail low-position line, the rigidity of the turnout foundation structure can be obviously improved, the long-term stability of the turnout foundation structure is ensured, the turnout foundation structure is applicable to wide section conditions, the conventional design that the turnout foundation structure can be only placed at the position with good foundation rigidity and uniform bearing capacity in the prior art is broken through, and the turnout foundation structure is flexible in design; meanwhile, the maintenance work amount of the turnout foundation structure can be reduced, the structure is simple, the occupied area is small, and the construction controllability is strong.
In some embodiments, the bearing assembly comprises a bearing platform 12 arranged at the top end of the cast-in-situ bored pile 11 and a boss 13 fixed on the bearing platform 12, wherein the top end of the boss 13 bears the turnout beam; the projection area of the boss 13 in the horizontal plane is smaller than the projection area of the bearing platform 12 in the horizontal plane. In the straddle type monorail low-level line, a rotating device is generally arranged below a turnout beam, the turnout beam rotates on the rotating device, specifically, the rotating device is arranged at the top end of a boss 13, and the turnout beam is arranged on the rotating device. The projected area of the bearing platform 12 in the horizontal plane is generally larger than that of the boss 13, so that the bearing platform 12 has greater bearing capacity and the arrangement of a proper number of cast-in-situ bored piles 11 at the bottom end of the bearing platform 12 is facilitated. Specifically, referring to fig. 1, the distance between any edge of the periphery of the boss 13 and the projection of the corresponding edge on the platform 12 in the horizontal plane is greater than or equal to 200 mm. In addition, the plurality of cast-in-situ bored piles 11 are arranged at intervals, and the center-to-center distance between adjacent cast-in-situ bored piles 11 is greater than or equal to 3 m.
The turnout foundation structure has the advantages that pressure, tension, bending moment and torque generated when the turnout beam rotates are directly applied to the boss 13, the boss 13 transmits stress to the bearing platform 12 and finally to the cast-in-situ bored pile 11, the bearing platform 12 and the boss 13 jointly form a rigid bearing structure, the bearing capacity of the turnout foundation structure is obviously improved, better bearing of the turnout beam can be realized, and the requirement for safe operation of a train is met. Further, the lower portion of the platform 12 is buried in the ground. Specifically, the thickness of the lower part 1/4-3/4 of the platform 12 is buried in the ground in the height direction of the platform 12. Referring to fig. 1, the thickness of the lower part of the platform 12 buried in the ground is 1/4-3/4 of the thickness of the platform 12. The stability and the bearing capacity of the bearing platform 12 are further enhanced, the rigidity of the bearing assembly is enhanced, and deformation of a foundation structure when the turnout beam rotates is avoided.
In some embodiments, bored pile 11 is connected to cap 12 by rebar. The bearing platform 12 is connected with the boss 13 through a steel bar. When the cast-in-situ bored pile 11 and the bearing platform 12 are constructed, reinforcing steel bars can be buried at the tops of the cast-in-situ bored pile 11 and the bearing platform 12, the reinforcing steel bars at the top of the cast-in-situ bored pile 11 are bound with the bearing platform 12, and the reinforcing steel bars at the top of the bearing platform 12 are bound with the bosses 13, so that the connection between the cast-in-situ bored pile 11 and the bearing platform 12 and between the bearing platform 12 and the bosses 13 can be enhanced, the stability among the three is kept, and the bearing stability of a bearing structure formed by the.
In other embodiments, referring to fig. 1 and 2, a connecting bolt 15 is embedded at the top of the boss 13. In the straddle type monorail low-level line, a rotating device is generally arranged below a turnout beam, the turnout beam rotates on the rotating device, specifically, the rotating device is arranged at the top end of a boss 13, and the turnout beam is arranged on the rotating device. It will be appreciated that the connecting bolts 15 at the top of the boss 13 are used for connecting the above-mentioned turning device, ensuring the stability of the connection between the boss 13 and the turning device, so that the switch beam provided on the turning device can have better stability when turning.
In some embodiments, referring to fig. 1, the switch foundation structure further includes a concrete pad 14, the concrete pad 14 being disposed between the bored pile 11 and the load bearing assembly. As can be understood, the main function of the bearing assembly is to transmit the load of the turnout beam to the bored pile 11, but the area of the bearing platform 12 is large, and suspended pouring cannot be performed, so that the concrete cushion layer 14 is constructed on the foundation slightly lower than the pile top elevation of the bored pile 11 to serve as a bottom mould for pouring the bearing platform 12; meanwhile, the concrete cushion layer 14 can also protect the isolation layer at the bottom of the bearing platform 12 from directly contacting soil and water.
Further, the projected area of the concrete pad 14 in the horizontal plane is larger than the projected area of the load bearing assembly in the horizontal plane. Specifically, the concrete pad 14 has a thickness of at least 0.1m and extends outwardly a length greater than or equal to 100mm compared to the cap 12. That is, referring to fig. 1, the distance between any one edge of the periphery of the concrete pad 14 and the projection of the corresponding edge on the platform 12 in the horizontal plane is greater than or equal to 100mm, respectively, to facilitate the casting of the platform 12 over the concrete pad 14.
In a second aspect of the embodiments of the present application, there is also provided a construction method of a turnout foundation structure, which is applied to the turnout foundation structure described above, with reference to fig. 3, and includes the following steps: s1, constructing a plurality of cast-in-situ bored piles 11, and arranging the plurality of cast-in-situ bored piles 11 at intervals, wherein one end of each cast-in-situ bored pile 11, which is far away from the turnout beam, penetrates through the weak stratum 20 and extends into the bearing layer 30; s2, constructing a bearing assembly at the top ends of the plurality of cast-in-situ bored piles 11, so that the bearing assembly is fixed on the plurality of cast-in-situ bored piles 11, and the construction of a single abutment 10 is completed; and S3, repeating the steps S1-S2, and manufacturing a plurality of abutments 10 arranged at intervals.
In the embodiment of the application, the multiple abutments 10 are arranged at intervals and can be separately constructed, the construction method is simple, the controllability is high, the construction can be carried out respectively according to the bearing capacity required by each abutment 10, and further, the stability of the turnout foundation structure and the bearing capacity of the turnout foundation structure to the turnout beam are ensured.
Specifically, the diameter of cast-in-situ bored pile 11 may be determined according to its bearing capacity requirement for the turnout beam, and the center distance between two adjacent cast-in-situ bored piles 11 is greater than or equal to 3 m. The bottom end of the cast-in-situ bored pile 11 should penetrate through the weak stratum 20 and extend into the bearing stratum 30, so that the deformation of the turnout beam in the rotating process is reduced, and the rigidity and long-term stability of the turnout foundation structure are ensured. In some embodiments, step S1 further includes: steel bars are embedded at the top of the bored pile 11 to connect the load bearing assembly. In the construction process, steel bars are buried in the top of the cast-in-situ bored pile 11, and the steel bars are bound with the steel bars of the bearing platform 12 before the bearing platform 12 is poured, so that the connection stability between the cast-in-situ bored pile 11 and the bearing platform 12 is enhanced. Similarly, in other embodiments, step S2 further includes: a bearing platform 12 of the load bearing assembly is constructed and reinforcing bars are buried at the top of the bearing platform 12 to connect the bosses 13. In the construction process, steel bars are buried in the top of the bearing platform 12, and the steel bars of the bosses 13 are bound before the bosses 13 are poured, so that the connection stability between the bearing platform 12 and the bosses 13 is enhanced. In other embodiments, step S2 further includes: the connecting bolts 15 are embedded in the top of the load bearing assembly. That is, the connecting bolt 15 is embedded at the top of the boss 13 for connecting a rotating device or other devices which are arranged above the boss 13 and make the turnout beam rotate, so as to ensure the rotating stability of the turnout beam.
In some embodiments, step S2 specifically includes: constructing a concrete cushion 14 on the top ends of the plurality of cast-in-situ bored piles 11, so that the concrete cushion 14 is fixed on the plurality of cast-in-situ bored piles 11; and constructing a bearing platform 12 of the bearing assembly on the concrete cushion layer 14 and constructing a boss 13 of the bearing assembly on the top end of the bearing platform 12, thereby completing the construction of the single abutment 10. As can be understood, the bearing platform 12 in the bearing assembly has a large area and cannot be poured in a suspended manner, so that the concrete cushion layer 14 is constructed on the foundation slightly lower than the pile top elevation of the cast-in-situ bored pile 11 and serves as a bottom mold for pouring the bearing platform 12; meanwhile, the concrete cushion layer 14 can also protect the isolation layer at the bottom of the bearing platform 12 from directly contacting soil and water.
In some embodiments, step S1 is preceded by the steps of: and excavating the construction platform, wherein the depth of the construction platform is 1/4-3/4 of the thickness of the bearing platform 12 of the bearing assembly. After the bearing assembly is constructed, 1/4-3/4 of the thickness of the bearing platform 12 are buried in the ground, so that the stability and the bearing capacity of the bearing platform 12 are enhanced, the rigidity of the bearing assembly is enhanced, and deformation of a foundation structure when the turnout beam rotates is avoided. The construction platform excavated around the bearing platform 12 is backfilled with concrete during construction of the bearing platform 12, so that the stability of the bearing platform 12 is improved, the stability of the roadbed structure below the bearing platform 12 and the concrete cushion layer 14 is protected, and the roadbed is prevented from being disturbed by the attached structures.
The construction method of the turnout foundation structure in the embodiment of the application is as follows:
1. leveling the field of the construction site, excavating the construction platform according to the slope ratio of 1: 1, wherein the excavation depth is about 2/3 of the thickness of the bearing platform 12 of the bearing assembly, and implementing necessary temporary protection on the side slopes excavated at the two sides of the construction platform.
2. And constructing the cast-in-situ bored pile 11, and embedding reinforcing steel bars in the cast-in-situ bored pile 11. The diameter, number and spacing of the bored piles 11 are determined according to the bearing capacity requirements to be provided for the turnout beam. The spacing between adjacent bored piles 11 is not less than 3 m. The thickness of the concrete net protective layer of the outermost layer of the pile body is 70 mm. The bottom end of cast-in-situ bored pile 11 extends through weak ground 20 into bearing stratum 30.
3. And after the concrete solidification period of the cast-in-situ bored pile 11 is finished, tamping and leveling the construction platform. If the stratum is a filling layer, the compaction coefficient lambdac (heavy compaction standard) is required to be not less than 0.95, the bearing capacity of the foundation is required to be not less than 200kPa, otherwise, the gravel soil is tamped until the conditions are met.
4. After the construction platform is tamped and leveled, the concrete pad 14 is cast in place, so that the concrete pad 14 is horizontally arranged, has a thickness of 0.1m and extends 100mm in length compared with the bearing platform 12 to be cast.
5. And after the solidification period of the concrete cushion layer 14 is finished, binding the steel bars pre-embedded in the cast-in-situ bored pile 11 and the steel bars of the bearing platform 12, then pouring the bearing platform 12 and pre-embedding the steel bars in the bearing platform 12. During construction, the concrete net protective layer of the top surface and the side surface steel bars of the bearing platform 12 is 50mm, and the concrete net protective layer of the ground steel bars of the bearing platform 12 is 100 mm. When the bearing platform 12 is constructed, the leveling error between the top surface and the bottom surface of the bearing platform 12 is strictly controlled within 5 mm.
6. And after the concrete setting period of the bearing platform 12 is finished, backfilling the periphery of the bearing platform 12 of the excavated construction platform with concrete. Binding the reinforcing steel bars to be embedded in the bosses 13 with the embedded reinforcing steel bars of the bearing platform 12, then pouring the bosses 13, embedding connecting bolts 15 at the tops of the bosses 13 for connecting a rotating device or other devices for rotating the turnout beam. When the boss 13 is constructed, the concrete net protective layer of the outermost layer of the steel bar is 50mm in thickness. The distance between the edge of the boss 13 and the edge of the bearing platform 12 is not less than 200mm, namely the distance between any edge of the periphery of the boss 13 and the projection of the corresponding edge on the bearing platform 12 in the horizontal plane is greater than or equal to 200 mm. At this point, the construction of the single abutment 10 is completed.
7. And (5) repeating the steps 1-6, manufacturing a plurality of abutments 10 arranged at intervals, and completing construction of the turnout foundation structure.
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 (10)
1. The utility model provides a straddle type single track puts switch foundation structure of circuit low which characterized in that: the turnout pier comprises a plurality of abutments for supporting a turnout beam, wherein the abutments are arranged at intervals along the length direction of the turnout beam; the pier is including bearing the load-bearing component and the support of switch roof beam a plurality of drilling bored concrete piles of load-bearing component, the bottom of drilling bored concrete pile stretches into the holding power layer after passing weak stratum, the top support in the bottom of load-bearing component.
2. The turnout foundation structure of claim 1, wherein the bearing assembly comprises a bearing platform arranged at the top end of the cast-in-situ bored pile and a boss fixed on the bearing platform, and the top end of the boss bears the turnout beam; the projection area of the boss in the horizontal plane is smaller than that of the bearing platform in the horizontal plane.
3. The switch foundation structure of claim 2, wherein the lower portion of the cap is buried in the ground; and/or the presence of a gas in the gas,
and a connecting bolt is embedded at the top of the boss.
4. The turnout foundation structure of claim 2, wherein the cast-in-situ bored pile is connected with the bearing platform through a steel bar; and/or the bearing platform is connected with the boss through a steel bar.
5. The switch foundation structure of claim 1, further comprising a concrete pad disposed between the bored pile and the bearing assembly.
6. The switch infrastructure of claim 5, wherein a projected area of the concrete pad in a horizontal plane is greater than a projected area of the load bearing assembly in a horizontal plane.
7. A construction method of a turnout foundation structure, which is applied to the turnout foundation structure of any one of claims 1-6, comprises the following steps:
s1, constructing a plurality of cast-in-situ bored piles, wherein the cast-in-situ bored piles are distributed at intervals, and one end, far away from the turnout beam, of each cast-in-situ bored pile penetrates through the weak stratum and extends into the bearing layer;
s2, constructing a bearing assembly at the top ends of the plurality of cast-in-situ bored piles, so that the bearing assembly is fixed on the plurality of cast-in-situ bored piles, and the construction of a single abutment is completed;
and S3, repeating the step S1 to the step S2, and manufacturing a plurality of abutments arranged at intervals.
8. The construction method of the turnout foundation structure according to claim 7, wherein the step S2 specifically comprises:
constructing a concrete cushion layer at the top ends of the cast-in-situ bored piles, and fixing the concrete cushion layer on the cast-in-situ bored piles; and constructing a bearing platform of the bearing assembly on the concrete cushion layer, constructing a boss of the bearing assembly at the top end of the bearing platform, and completing construction of a single pier.
9. The construction method of the turnout foundation structure of claim 7, wherein the step S1 is preceded by the following steps:
and excavating a construction platform, wherein the depth of the construction platform is 1/4-3/4 of the thickness of the bearing platform of the bearing assembly.
10. The construction method of the turnout foundation structure of claim 7, wherein the step S1 further comprises: embedding steel bars at the top of the cast-in-situ bored pile to connect the bearing assembly; and/or
The step S2 further includes: and embedding a connecting bolt at the top of the bearing component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010622755.0A CN111636257A (en) | 2020-06-30 | 2020-06-30 | Turnout foundation structure of straddle type single-rail low-mounted line and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010622755.0A CN111636257A (en) | 2020-06-30 | 2020-06-30 | Turnout foundation structure of straddle type single-rail low-mounted line and construction method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN111636257A true CN111636257A (en) | 2020-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010622755.0A Pending CN111636257A (en) | 2020-06-30 | 2020-06-30 | Turnout foundation structure of straddle type single-rail low-mounted line and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117626721A (en) * | 2024-01-24 | 2024-03-01 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Ballastless track system for isolating foundation deformation |
-
2020
- 2020-06-30 CN CN202010622755.0A patent/CN111636257A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117626721A (en) * | 2024-01-24 | 2024-03-01 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Ballastless track system for isolating foundation deformation |
| CN117626721B (en) * | 2024-01-24 | 2024-04-12 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Construction method of ballastless track system for isolating foundation deformation |
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