CN212533541U - Pile plate roadbed structure and railway roadbed - Google Patents

Abstract

The utility model provides a pile sheet roadbed structure and railway roadbed, pile sheet roadbed structure includes loading board, a plurality of drilling bored concrete pile and a plurality of joist, the bottom of a plurality of drilling bored concrete pile all stretches into in the ground, the loading board sets up and supports in the top of a plurality of drilling bored concrete pile along the circuit vertically, the joist sets up respectively between loading board and drilling bored concrete pile and a plurality of joists set up along the circuit vertically at an interval, at least two joists set up in the vertical both ends of loading board; a plurality of drilling bored concrete piles set up along the vertical interval of circuit, and a plurality of drilling bored concrete piles are in the horizontal single row setting of existing building district along the circuit. The number of the cast-in-situ bored piles in the transverse direction of the line of the pile plate roadbed structure can be flexibly arranged; in the existing building section, bored piles are arranged in a single row along the transverse direction of the line; in the unrestricted section, the bored pile is transversely provided with a single row or two rows along the line; the method solves the problem of roadbed structure design in the limited area, and reduces or eliminates the mutual influence between a new construction and the existing building.

Description

Pile plate roadbed structure and railway roadbed

Technical Field

The utility model relates to a railway roadbed technical field, in particular to stake board roadbed structure and railway roadbed.

Background

Along with the large-scale construction of high-speed railways and urban rail transit, the cross connection of the high-speed railways and the urban rail transit is very close, particularly, the construction types in the range of urban areas and stations are multiple, the types of structural foundations are various, the newly-built structure is inconsistent with the construction time nodes of the existing building design, and the difficulty and the risk of the engineering are greatly improved due to the mutual influence of the structures. The difficulty of designing and constructing the high-speed railway subgrade in the range of urban areas and stations is as follows: on one hand, the existing buildings such as railways, highways, subways, station houses and the like have various basic structure types, occupy a large using area and greatly reduce the range of the high railway foundation design; on the other hand, the high-speed rail construction can cause the displacement of the surrounding soil body, thereby causing the additional internal force and deformation of the nearby soil body, and directly relating to the safe operation of roads, railways, station houses and the like. Therefore, aiming at the influence that the design of a high-speed railway foundation in the range of urban areas and stations can be utilized in a small range and can be used for the safe operation of surrounding existing buildings, the design of a subgrade foundation structure capable of being flexibly arranged is urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model provides a stake board roadbed structure and railway roadbed to solve the technical problem that the scope that the design of prior art crowbar roadbed can utilize in urban area, station within range is little and can produce the influence to the safe operation of existing building on every side.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

the utility model provides a pile plate roadbed structure, including loading board, a plurality of drilling bored concrete pile and a plurality of joists, a plurality of the bottom of drilling bored concrete pile all stretches into in the ground, the loading board sets up and supports in a plurality of the top of drilling bored concrete pile along the circuit is vertical, the joists set up respectively in the loading board with between the drilling bored concrete pile and a plurality of the joists set up along the circuit is vertical at intervals, wherein at least two the joists set up in the vertical both ends of loading board; the cast-in-situ bored piles are longitudinally arranged at intervals along the line and are arranged in a single row along the line in the existing building section.

Furthermore, in a non-existing building section, the plurality of cast-in-situ bored piles are arranged in a double row along the transverse direction of the line.

Furthermore, the height of the cast-in-situ bored piles arranged in two rows along the transverse direction of the line is smaller than that of the cast-in-situ bored piles arranged in a single row; and/or the height of the cast-in-situ bored piles arranged in two rows along the horizontal direction of the line is 0.6-0.75 time of the height of the cast-in-situ bored piles arranged in a single row.

Furthermore, the height of the bored piles arranged in a single row along the horizontal direction of the line is 8-70 m; and/or the height of the cast-in-situ bored piles arranged in two rows along the horizontal direction of the line is 6-52.5 m.

Further, the pile slab roadbed structure further comprises a sliding layer, wherein the sliding layer is arranged between the joist and the bearing plate.

Furthermore, the horizontal dimension of the joist along the line is greater than that of the bearing plate along the line, two horizontal ends of the joist along the line are respectively provided with a limiting part, the limiting parts extend upwards along the direction perpendicular to the joist, and the bearing plate is supported between the two limiting parts on the joist.

Furthermore, the number of the joists is two, the two joists are respectively arranged at the two longitudinal ends of the bearing plate, and each joists is connected with two cast-in-situ bored piles.

Furthermore, the cast-in-situ bored pile is used for supporting one end of the joist or the bearing plate to extend into the joist or the bearing plate, and the extending distance is greater than or equal to 10 cm.

According to the utility model discloses an on the other hand still provides a railway roadbed, it includes a plurality of foretell pile plate roadbed structure and lays in pile plate roadbed structure the track on loading board top is a plurality of pile plate roadbed structure is the circuit along the line vertically sets up.

Further, it is adjacent the pile plank roadbed structure passes through the joist is connected, and is adjacent the pile plank roadbed structure form the expansion joint between the loading board.

Furthermore, slag blocking walls are respectively arranged on two longitudinal sides of the bearing plate, the two slag blocking walls extend upwards along the direction perpendicular to the bearing plate, and the rails are laid between the two slag blocking walls.

The pile plate roadbed structure provided by the utility model has the advantages that the number of the cast-in-situ bored piles can be flexibly arranged in the transverse direction of the line; the existing building section generally comprises existing pier columns, existing piles and existing bearing platforms, the available range of a pile slab roadbed structure is small, and the bored cast-in-place piles are arranged in a single row along the horizontal direction of a line; in an unrestricted section, the available range of the pile plate roadbed structure is large, and the cast-in-situ bored piles are transversely arranged in a single row or double rows along the line; therefore, the problem of roadbed structure design of a limited area is solved, and the mutual influence of a newly-built project and an existing building is reduced or eliminated.

Drawings

Fig. 1 is a schematic structural diagram of a pile slab roadbed structure provided by an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along line I-I of FIG. 1;

FIG. 3 is a cross-sectional view taken along line II-II of FIG. 1;

FIG. 4 is a cross-sectional view taken along line III-III of FIG. 1;

FIG. 5 is a cross-sectional view of IV-IV in FIG. 1.

Description of reference numerals:

10. a pile slab roadbed structure; 20. existing roadbed structures;

11. a carrier plate; 11a, a slag wall; 12. drilling a cast-in-place pile; 13. a joist; 13a, a stopper.

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 position or positional relationship is based on the position or positional relationship shown in fig. 2, wherein "top" and "bottom" refer to the top-bottom direction of fig. 2. It is to be understood that such directional terms are merely for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must be in a particular orientation, constructed and operative in a particular orientation, and therefore should not be taken as limiting the invention.

Referring to fig. 1 to 5, in a first aspect of the embodiment of the present application, there is provided a pile slab roadbed structure, which includes a bearing plate 11, a plurality of cast-in-situ bored piles 12 and a plurality of joists 13, wherein bottom ends of the plurality of cast-in-situ bored piles 12 all extend into a foundation, the bearing plate 11 is longitudinally disposed along a line and supported at top ends of the plurality of cast-in-situ bored piles 12, the joists 13 are respectively disposed between the bearing plate 11 and the cast-in-situ bored piles 12, and the plurality of joists 13 are longitudinally spaced along the line, wherein at least two joists 13 are disposed at longitudinal ends of the bearing plate 11; the plurality of cast-in-situ bored piles 12 are arranged at intervals along the longitudinal direction of the line, and the plurality of cast-in-situ bored piles 12 are arranged in a single row along the transverse direction of the line in the existing building section.

Understandably, when the high-speed railway subgrade is designed and newly built in the range of urban areas and stations, the range of the newly built high-speed railway subgrade is limited due to the fact that the existing buildings have various foundation structure types and occupy a large amount of use area; the high-speed railway foundation usually adopts a pile plate structure, the prior art has certain requirement specifications for the distance between the cast-in-situ bored piles 12 of the pile plate structure, and the limited sections are difficult to meet the design requirements of the pile plate structure.

In the embodiment of the application, referring to fig. 1, a pile slab roadbed structure 10 includes a plurality of cast-in-situ piles 12, wherein a part of the cast-in-situ piles 12 directly support a joist 13, and at this time, the cast-in-situ piles 12 and the joist 13 are cast in place as a whole; the remaining cast-in-situ bored piles 12 directly support the bearing plate 11, and the cast-in-situ bored piles 12 are cast in situ with the bearing plate 11. The cast-in-situ bored piles 12 are spaced longitudinally along the line and provide support for the joists 13 and the load floor 11, respectively. The cast-in-situ bored pile 12 and the joist 13 or the bearing plate 11 are integrally cast, so that the cast-in-situ bored pile 12 and the joist 13 or the bearing plate 11 can bear loads simultaneously, and the punching resistance and the shearing resistance of the structure are improved.

In the existing building site, the cast-in-situ bored piles 12 are arranged in a single row along the horizontal line, so that the distance between the cast-in-situ bored piles 12 and the existing piles of the existing roadbed structure 20 is increased to a certain extent, and the requirements of relevant specifications between piles of a pile plate roadbed structure in the prior art are met. In the non-existing building section, the cast-in-situ bored piles 12 can be arranged in a single row or in double rows along the horizontal direction of the line, and the double rows of cast-in-situ bored piles 12 can be arranged at appropriate positions in the cast-in-situ bored piles, so that the supporting effect of the cast-in-situ bored piles on the joists 13 and the bearing plates 11 is enhanced, and the overall stability of the pile slab roadbed structure 10 is improved. The plurality of joists 13 are longitudinally arranged at intervals along the line and are also used for supporting the bearing plate 11, the pile slab roadbed structure 10 at least comprises two joists 13, and the joists 13 are respectively positioned at two opposite ends of the bearing plate 11, so that the supporting effect on the bearing plate 11 is enhanced.

According to the pile plate roadbed structure, the number of the cast-in-situ bored piles 12 can be flexibly arranged in the horizontal direction of a line; the existing building section generally has existing pier columns, existing piles and existing bearing platforms, the available range of the pile slab roadbed structure 10 is small, and the bored concrete piles 12 are arranged in a single row along the horizontal direction of a line; in an unrestricted section, the available range of the pile plate roadbed structure 10 is large, and the cast-in-situ bored piles 12 are transversely arranged in a single row or two rows along a line; therefore, the problem of roadbed structure design of a limited area is solved, and the mutual influence of a newly-built project and an existing building is reduced or eliminated. The pile plate roadbed structure 10 of the embodiment of the application can be used for areas with limited area ranges and areas with high requirements on settlement control, and can also be used for foundation reinforcement of soft soil areas.

In some embodiments, referring to fig. 1 and 2, in a non-existing building site, a plurality of cast-in-place bored piles 12 are arranged in a row transversely along the line. In the non-existing building section, the cast-in-situ bored piles 12 are arranged in double rows at proper positions, so that the supporting effect of the cast-in-situ bored piles on the joists 13 and the bearing plates 11 can be enhanced, and the overall stability of the pile slab roadbed structure 10 is improved. Further, the height of the bored piles 12 arranged in two rows in the transverse direction along the line is smaller than the height of the bored piles 12 arranged in a single row. Under the condition that the same load can be achieved, the cast-in-situ bored piles 12 arranged in two rows in the transverse direction along the line can be designed to be smaller in height, and the same supporting effect can be achieved on the joist 13 and the bearing plate 11. Specifically, the height of the cast-in-situ bored piles 12 arranged in two rows along the horizontal direction of the line is 0.6-0.75 time of the height of the cast-in-situ bored piles 12 arranged in a single row. In other embodiments, the bored piles 12 arranged in a single row laterally along the line have a height of 8m to 70 m. In other embodiments, the bored piles 12 arranged in two rows transversely along the line have a height of 6m to 52.5 m.

In some embodiments, the pile foundations structure 10 further comprises a sliding layer, which is arranged between the joist 13 and the bearing plate 11. Specifically, the sliding layer between the joist 13 and the bearing plate 11 is two layers of polyester filament composite polyethylene geomembranes. In the embodiment of the present application, the sliding layer between the joist 13 and the bearing plate 11 can effectively reduce the stress of the bearing plate 11, and can reduce the horizontal load of the cast-in-situ bored pile 12.

In some embodiments, referring to fig. 4, the dimension of the joist 13 along the horizontal direction of the line is larger than the dimension of the loading plate 11 along the horizontal direction of the line, and both ends of the joist 13 along the horizontal direction of the line are respectively provided with a limiting member 13a, the limiting members 13a extend upwards along a direction perpendicular to the joist 13, and the loading plate 11 is supported between the two limiting members 13a on the joist 13. Specifically, the dimension of the joist 13 in the lateral direction of the line is 0.6m larger than the dimension of the loading plate 11 in the lateral direction of the line. The limiting members 13a may be tenons disposed at both ends of the joist 13 in the transverse direction of the line. The tenons serve to constrain lateral movement of the carrier plate 11.

In some embodiments, referring to fig. 1, the number of the joists 13 is two, two joists 13 are respectively disposed at two longitudinal ends of the bearing plate 11, and two cast-in-situ bored piles 12 are connected to each of the joists 13. In the embodiment of the present application, the number of the joists 13 does not need to be too many, but the joists 13 support the bearing plate 11, so that the joists 13 are disposed at two opposite ends of the bearing plate 11, and the supporting function for the bearing plate 11 is strongest. Under the simultaneous supporting action of the two joists 13 and the cast-in-situ bored pile 12, the loading capacity and stability of the bearing plate 11 are ensured.

Further, one end of the cast-in-situ bored pile 12 for supporting the joist 13 or the loading plate 11 extends into the interior of the joist 13 or the loading plate 11, and the extending distance is greater than or equal to 10 cm. Due to the complicated stress of the pile slab roadbed structure 10, in order to ensure the effective connection between the pile foundation and the bearing plate 11 and between the pile foundation and the joist 13, the top end of the cast-in-situ bored pile 12 is inserted into the interior of the joist 13 or the bearing plate 11 by not less than 10cm, so as to ensure that the main reinforcement of the cast-in-situ bored pile 12 is effectively anchored in the interior of the joist 13 or the bearing plate 11.

The construction process of the pile plate roadbed structure 10 of the embodiment of the application is as follows:

1. and (3) construction of the cast-in-situ bored pile 12: the method comprises the following steps of (1) finishing and leveling a section where a pile slab roadbed structure 10 needs to be newly built, carrying out construction preparation, setting out construction, and embedding a steel pile casing; preparing slurry; drilling a pile foundation, cleaning, manufacturing a reinforcement cage, and installing the reinforcement cage into the pile foundation hole; and (5) pouring concrete into the pile foundation hole, and excavating and chiseling the pile head.

2. And (3) constructing a joist 13: excavation of a foundation pit, detection of a pile foundation, treatment of a substrate, binding of 13 steel bars of a joist, formwork erection and concrete pouring.

3. Construction of the bearing plate 11: flattening and compacting a construction site, detecting a pile foundation, paving a bottom template and a side template of a bearing plate 11, binding steel bars of the bearing plate 11, pouring concrete and maintaining the concrete; and finally, dismantling the concrete template, and finishing and maintaining.

In a second aspect of the embodiment of the present application, a railroad bed is provided, which includes a plurality of pile plate roadbed structures 10 and a track laid on top of the bearing plate 11 of the pile plate roadbed structure 10, wherein the pile plate roadbed structures 10 are arranged longitudinally along a line. The railway roadbed of the embodiment of the application comprises a plurality of pile plate roadbed structures 10 which are longitudinally arranged along a line, and roadbed filling materials or a track structure is directly paved on a bearing plate 11. The railway roadbed of the embodiment of the application comprises the pile plate roadbed structure 10, so that the technical problem which can be solved by the pile plate roadbed structure 10 can be solved, and the similar technical effect can be achieved, and the details are not repeated here.

In some embodiments, adjacent pile slab roadbed structures 10 are connected by joists 13, and an expansion joint is formed between the bearing plates 11 of the adjacent pile slab roadbed structures 10. The adjacent pile slab roadbed structures 10 share one joist 13, and the connection between the joists 13 ensures that the adjacent pile slab roadbed structures 10 maintain relative stability, thereby ensuring the overall stability of the railway roadbed. Specifically, 2cm expansion joints are arranged between the bearing plates 11 of the adjacent pile slab roadbed structures 10, and can be filled with asphalt reinforcement bars.

Furthermore, slag blocking walls 11a are respectively arranged on two longitudinal sides of the bearing plate 11, the two slag blocking walls 11a extend upwards along a direction perpendicular to the bearing plate 11, and the rails are laid between the two slag blocking walls 11 a. Roadbed filling materials are paved or a track structure is directly paved on the bearing plate 11, and slag blocking walls 11a arranged along the longitudinal two sides of the bearing plate 11 play a role in blocking the roadbed filling materials and can restrain the transverse displacement of the track structure.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the scope of the present invention. Moreover, the technical solutions of the present invention between the various embodiments can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are combined and contradictory or cannot be realized, it should be considered that the combination of the technical solutions does not exist, and the present invention 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 claims.

Claims (11)

1. The utility model provides a pile sheet roadbed structure which characterized in that: the device comprises a bearing plate, a plurality of cast-in-situ bored piles and a plurality of joists, wherein the bottom ends of the cast-in-situ bored piles extend into a foundation, the bearing plate is longitudinally arranged along a line and supported at the top ends of the cast-in-situ bored piles, the joists are respectively arranged between the bearing plate and the cast-in-situ bored piles and are longitudinally arranged along the line at intervals, and at least two joists are arranged at the two longitudinal ends of the bearing plate;

the cast-in-situ bored piles are longitudinally arranged at intervals along the line and are arranged in a single row along the line in the existing building section.

2. The pile slab roadbed structure of claim 1, wherein in a non-existing building section, a plurality of the cast-in-situ piles are arranged in a row transversely along the track.

3. The pile-slab roadbed structure of claim 2, wherein the height of the bored piles arranged in two rows in a lateral direction along the road is smaller than the height of the bored piles arranged in one row; and/or the presence of a gas in the gas,

the height of the cast-in-situ bored piles arranged in two rows along the horizontal direction of the line is 0.6-0.75 time of the height of the cast-in-situ bored piles arranged in a single row.

4. The pile-slab roadbed structure of claim 2, wherein the height of the bored piles arranged in a single row in a lateral direction along the road is 8-70 m; and/or the presence of a gas in the gas,

the height of the cast-in-situ bored piles arranged in two rows along the horizontal direction of the line is 6-52.5 m.

5. The pile-slab roadbed structure according to claim 1, further comprising a sliding layer, the sliding layer being disposed between the joist and the bearing plate.

6. The pile slab roadbed structure according to claim 1, wherein the size of the joist in the horizontal direction of the line is larger than the size of the loading plate in the horizontal direction of the line, and both ends of the joist in the horizontal direction of the line are respectively provided with a stopper extending upward in a direction perpendicular to the joist, and the loading plate is supported on the joist between the stoppers.

7. A pile slab roadbed structure according to any one of claims 1 to 6, wherein the number of the joists is two, the two joists are respectively arranged at two longitudinal ends of the bearing plate, and each joists is connected with two cast-in-situ bored piles.

8. The pile-slab roadbed structure according to any one of claims 1 to 6, wherein one end of the cast-in-situ bored pile for supporting the joist or the bearing plate extends into the interior of the joist or the bearing plate by a distance greater than or equal to 10 cm.

9. A railway roadbed, characterized in that the railway roadbed comprises a plurality of pile plate roadbed structures according to any one of claims 1 to 8 and a plurality of tracks laid on the top ends of the bearing plates of the pile plate roadbed structures, and the pile plate roadbed structures are longitudinally arranged along a line.

10. The railroad bed of claim 9, wherein adjacent said pile sheet bed structures are connected by said joists, and wherein expansion joints are formed between said bearing plates of adjacent said pile sheet bed structures.

11. The railroad bed of claim 9, wherein said load carrying floor has slag dams on each of longitudinal sides thereof, said slag dams extending upwardly in a direction perpendicular to said load carrying floor, said rails being disposed between said slag dams.

Images