CN212801033U - Single-line box type roadbed structure for steep slope section - Google Patents

Abstract

The utility model provides a box roadbed structure of single line for abrupt slope district, this structure includes: the bottom plate is horizontally arranged on the horizontal part of the steep slope surface; a top plate disposed above the bottom plate; the first side plate and the second side plate are arranged at intervals and are respectively connected with the bottom plate and the top plate to form a cavity with the bottom plate and the top plate; the first side plate is provided with a first through hole communicated with the cavity, and the second side plate is provided with a second through hole communicated with the cavity. The roadbed structure is a single line and is arranged into a hollow box type structure, so that the foundation reinforcement range can be reduced, and the roadbed structure is suitable for a steep slope section; first through-hole and second through-hole set up and both reduced the dead weight and be favorable to further reducing the ground reinforcement scope in order being applicable to the abrupt slope district and be favorable to reducing the road bed inside and outside difference in temperature, avoid the roadbed structure fracture, improve roadbed structure's stability.

Description

Single-line box type roadbed structure for steep slope section

Technical Field

The utility model relates to a road bed engineering field especially relates to a box roadbed structure of single line for abrupt slope district.

Background

In the steep slope section of the railway in the mountain area, the ratio of the projection length of the steep slope surface in the vertical direction to the projection length of the steep slope surface in the horizontal direction is more than 0.4, and the terrain of the steep slope section is steep, so that the land utilization is limited; the geological topography of the substrate of the steep slope section is uneven, so that the roadbed structure is easy to have differential settlement; even the basal body on the downhill side can collapse and slide, and the roadbed is difficult to construct.

The steep slope highway section generally adopts trapezoidal sectional fill roadbed structure at present, this roadbed is big end down's trapezoidal solid construction, solid construction self weight is big, it is big to need the roadbed reinforcing scope and the bottom surface area is big, need dig the base in the eminence of steep slope at the in-process of building, low department packs, this kind is partly dug and is filled, the building process investment that the height filled the deep digging is great and be unfavorable for the stability of embankment side slope, this roadbed structure is difficult and self stability receives the threat in the limited steep slope section of land use.

SUMMERY OF THE UTILITY MODEL

In view of this, the main object of the utility model is to provide a box roadbed structure of single line for abrupt slope district to solve the technical problem who how to improve the roadbed structure's of abrupt slope district stability.

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

the embodiment of the utility model provides a box roadbed structure of single line for abrupt slope district, include: the bottom plate is horizontally arranged on the horizontal part of the steep slope surface; a top plate disposed above the bottom plate; the first side plate and the second side plate are arranged at intervals and are respectively connected with the bottom plate and the top plate to form a cavity with the bottom plate and the top plate; the first side plate is provided with a first through hole communicated with the cavity, and the second side plate is provided with a second through hole communicated with the cavity.

Further, the first through hole and the second through hole are coaxially arranged.

Further, the width of the bottom plate is 7-9 meters.

Furthermore, both ends of the bottom plate have certain preset distances with the first side plate and the second side plate.

Further, the width of the top plate is smaller than that of the bottom plate, and two ends of the top plate are respectively connected with the first side plate and the second side plate.

Further, the inner wall surface of the joint of the top plate and the first side plate is an inclined surface, and/or the inner wall surface of the joint of the top plate and the second side plate is an inclined surface.

Further, the inner wall surface of the joint of the bottom plate and the first side plate is an inclined surface, and/or the inner wall surface of the joint of the bottom plate and the second side plate is an inclined surface.

Further, an outer wall surface of a joint of the bottom plate and the first side plate is provided with an inclined surface, and/or an outer wall surface of a joint of the bottom plate and the second side plate is provided with an inclined surface.

Further, the box roadbed structure of single line has a plurality ofly, every box roadbed structure of single line the bottom plate all sets up in same horizontal plane.

Furthermore, a settlement joint is arranged between the adjacent single-line box type roadbed structures.

The embodiment of the utility model provides a single line box roadbed structure for abrupt slope district, this roadbed structure be the single line and set up to hollow box structure can reduce area and dead weight to reduce ground reinforcement scope and reduce the bearing pressure to the ground, be applicable to abrupt slope district, can improve the stability of road bed; the setting up of first through-hole and second through-hole reduces the dead weight on the one hand and is favorable to further reducing the ground reinforcement scope, improves the stability of the box roadbed structure of single line, and on the other hand is favorable to the inside and outside circulation of air of roadbed structure, reduces roadbed structure's the inside and outside difference in temperature to avoid roadbed structure fracture, improve roadbed structure's bearing capacity, thereby further improve the stability of the box roadbed structure of single line.

Drawings

Fig. 1 is the embodiment of the utility model provides a box roadbed structure's of single line schematic diagram for abrupt slope district.

Fig. 2 is a transverse cross-sectional view of a single-line box type roadbed structure for a steep slope section according to the embodiment of the invention;

fig. 3 is a longitudinal section of a single-line box type roadbed structure for a steep slope section provided by the embodiment of the utility model.

Description of reference numerals:

1-single-line box type roadbed structure, 11-bottom plate, 12-top plate, 13-first side plate, 14-second side plate, 131-first through hole, 141-second through hole, 15-groove and 16-settlement joint.

Detailed Description

The technical solution of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Various combinations of the specific features in the embodiments described in the detailed description may be made without contradiction, for example, different embodiments may be formed by different combinations of the specific features, and in order to avoid unnecessary repetition, various combinations of the specific features in the present invention are not separately described.

In the following description, references to the terms "first/second" are only intended to distinguish between similar items and not to imply a particular order to the items, but it is to be understood that "first/second" is to be interpreted as interchangeable under the appropriate circumstances with respect to the particular order or sequence so that the embodiments of the invention described herein can be practiced in other sequences than those illustrated or described herein.

It should be understood that the references to "above" and "below" are to be interpreted as referring to the orientation during normal use.

In a specific embodiment, as shown in fig. 1, a single-line box type roadbed structure for a steep slope section is arranged on a foundation of the steep slope, wherein the steep slope refers to a slope section with a sharp rise, and the ratio of the vertical direction projection length to the horizontal direction projection length of the slope surface of the slope is greater than 0.4, and the steep slope can be an urban road steep slope, a highway steep slope or a mountain area steep slope. The single line means that only one direction of trains can exist in a certain section on the roadbed at the same time, and when opposite trains exist, the trains need to be avoided in a station or an avoidance line. The single-line box type roadbed structure can be arranged on the periphery of a mountain body and spirally rises around the mountain body, or can be arranged on a foundation with a steep slope of an urban road and extends across a steep slope.

As shown in fig. 1, the utility model provides a single line box roadbed structure 1 for steep slope section includes first curb plate 13 and the second curb plate 14 of bottom plate 11, roof 12 and interval setting. The bottom plate 11 is horizontally arranged on the horizontal part of the steep slope surface, the horizontal part can be formed by arranging a reinforced foundation on the horizontal surface arranged on the steep slope section, the bottom plate 11 is paved or installed on the horizontal surface of the foundation, and the central line of the foundation is superposed with the central line of the bottom plate, so that the stress stability of the foundation is ensured. The top plate 12 is arranged above the bottom plate 11, the first side plate 13 and the second side plate 14 are respectively connected with the bottom plate 11 and the top plate 12 to support the top plate 12, and the top surface of the top plate 12 can be directly used for driving vehicles or pedestrians or can be used for installing railway tracks for train passing.

The first side plate 13 and the second side plate 14 are arranged at intervals and are connected with the bottom plate 11 and the top plate 12 to enclose a cavity, the roadbed structure with the cavity enclosed by the first side plate 13 and the second side plate 14, the bottom plate 11 and the top plate 12 is a box-type roadbed structure, and the hollow but not solid box-type roadbed structure greatly reduces the self weight of the roadbed, is beneficial to reducing the foundation reinforcement range and reduces the land area; and the hollow box type roadbed structure has better performances in the aspects of stress distribution, load transmission, deflection deformation and lateral displacement, and meets the roadbed stress requirement. Because abrupt slope district's ground is uneven, and geological topography changes unevenly moreover, leads to the land use limited, and the road bed is built difficultly, and this kind of hollow roadbed structure is because the ground reinforcement scope is little, and less land is used, and the structure is firm reliable and is applicable to the abrupt slope district that the topography is limited.

The first side plate 13 is provided with a first through hole 131 communicated with the cavity, the second side plate 14 is provided with a second through hole 141 communicated with the cavity, the first through hole 131 can be provided with a plurality of through holes and arranged along the extending direction of the roadbed, and the second through hole 141 can be provided with a plurality of through holes and arranged along the extending direction of the roadbed. The arrangement of the first through holes 131 and the second through holes 141 greatly reduces the dead weight of the roadbed structure and the foundation reinforcement range on one hand, thereby reducing the requirement of the foundation construction area; on the other hand, the arrangement of the first through holes 131 and the second through holes 141 can accelerate the temperature diffusion of the inner side of the roadbed, reduce the temperature difference between the inner side and the outer side of the roadbed, and reduce the cracking of the roadbed structure caused by the mismatch of shrinkage and creep caused by the temperature gradient, thereby improving the bearing capacity and the durability of the roadbed structure.

It should be noted that, in the process of providing the first through hole 131 and the second through hole 141, the stress characteristics and the load transfer mode of the first side plate 13 and the second side plate 14 are checked, and it is ensured that the arrangement of the first through hole 131 and the second through hole 141 meets the roadbed strength and stability standards. The shape and size of the first through hole 131 and the second through hole 141 can be properly changed in the process of empirical calculation so as to meet the stress requirement of the roadbed.

Optionally, the first through hole 131 and the second through hole 141 may be circular, arched or chamfered rectangular, and these shapes can avoid cracks caused by stress at the peripheries of the first through hole 131 and the second through hole 141 due to a tip effect, thereby improving the stability of the roadbed structure; optionally, the first side plate 13 and the second side plate 14 on the peripheral sides of the first through hole 131 and the second through hole 141 may be polished to be smooth surfaces to ensure smooth peripheral surfaces of the first through hole 131 and the second through hole 141, so as to avoid structural cracking and damage caused by stress concentration due to a tip effect, thereby further improving stability of the roadbed structure.

Alternatively, the first through hole 131 and the second through hole 141 may extend from 1/3 to 1/2 of the length from the top surface of the bottom plate 11 to the bottom surface of the top plate 12, and may have a width of 1/3 to 1/2 of the width of the single-wire box-type roadbed structure 1. The number of the single-line box type roadbed structures 1 can be multiple, and the adjacent single-line box type roadbed structures are assembled and connected to form a whole single-line box type roadbed structure with a certain length, and the first through holes 131 and the second through holes 141 can be continuously arranged on the adjacent single-line box type roadbed structures 1 or can be arranged on the adjacent single-line box type roadbed structures 1 at intervals. On the basis of meeting the strength, the stability and the durability of a roadbed structure, the requirements of the stability and the comfort of the high-speed railway can be ensured by setting the first through holes 131 and the second through holes 141 into proper shapes, sizes and numbers.

The utility model provides a single line box roadbed structure suitable for abrupt slope district, this roadbed structure be the single line and set up to hollow box structure and can reduce area and dead weight, reduce the bearing pressure to the ground to reduce the ground reinforcement scope, be applicable to the limited abrupt slope district of land use; the setting up of first through-hole and second through-hole can reduce the dead weight on the one hand and be favorable to further reducing the ground reinforcement scope, improve roadbed structure's stability, on the other hand is favorable to the circulation of air in roadbed structure, reduce roadbed structure's the inside and outside difference in temperature, it causes the shrink creep to mismatch the roadbed structure fracture that leads to reduce temperature gradient, thereby improve roadbed structure's bearing capacity and durability, further improve roadbed structure's stability, this kind of roadbed structure has the construction advantage in the limited abrupt slope section of relief.

In some embodiments, as shown in fig. 2, the first and second through- holes 131 and 141 are coaxially disposed. The axis is an axis of symmetry of the first side plate 13 and the second side plate 14, as indicated by the chain line in fig. 2. The first through holes 131 and the second through holes 41 are coaxially arranged to facilitate air convection, so that heat on the inner side of the roadbed can be dissipated from the two through holes, the adverse effect of temperature difference effect on the structure is reduced, and the stability of the roadbed structure is improved; in addition, the first through hole 131 and the second through hole 141 are symmetrically arranged to ensure the stress symmetry of the first side plate 13 and the second side plate 14, so that the roadbed deformation or crack generation caused by uneven stress in the load bearing process is avoided, the stability of the roadbed structure is further improved, and the higher stability of the roadbed structure in the narrow steep slope section of the foundation is ensured.

In some embodiments, the width of the floor 11 is 7-9 meters. The width refers to a dimension in the left-right direction in fig. 2. The width of the bottom plate 11 is set to be 7-9 meters, the width of the foundation of the steep slope section can be set to be 8-10 meters, and the bottom plate can sufficiently meet the stress requirement of the roadbed structure and the roadbed slope can meet the stability requirement by carrying out stability checking calculation on the roadbed structure and the roadbed slope. The width of bottom plate 11 is narrow, has reduced the area of seting up of ground, is applicable to the limited abrupt slope district of land use, and the bottom plate sets up to narrower structure and also can satisfy roadbed structure's stability requirement is guaranteed to the roadbed structure of cavity box cooperation both sides trompil moreover.

Alternatively, the thickness of the bottom plate 11 may be 0.8 m.

In some embodiments, as shown in fig. 2, the bottom plate 11 has a predetermined distance between both ends and the first side plate 13 and the second side plate 14. Specifically, first curb plate 13 and second curb plate 14 respectively vertically set up in the left and right sides of bottom plate 11 and leave a section distance with the both ends of bottom plate 11, for example, the width of bottom plate 11 is 8 meters, first curb plate 13 and the vertical upper surface of connecting in the bottom plate of second curb plate 14, the inside wall face interval of two curb plates is 5.45 meters, thickness is 0.55 meters, then the reservation distance that shows is 1 meter, thereby the pressurized requirement in the operation stage can be satisfied to the bearing area that has increased bottom plate 11 in the setting of this distance, and bottom plate and curb plate reservation distance guarantee that the bottom plate can bear certain moment of flexure effect, improve roadbed structure's steadiness.

In some embodiments, the foundations on both sides of the bottom plate 11 are provided with grooves 15, the grooves 15 are arranged in parallel with the length direction of the bottom plate 11, and the grooves 15 are used for draining accumulated water around the single-line box-type roadbed structure.

In some embodiments, as shown in fig. 2, the width of the top plate 12 is smaller than that of the bottom plate 11, two ends of the bottom plate 11 are respectively connected with the first side plate 13 and the second side plate 14, the width of the top plate 12 limits the vehicle driving area or the track laying area, limits the bearing area, ensures that the load is concentrated in the width range of the top plate 12, and is beneficial to reducing the building range of the foundation; and because roof 12 width is narrower, support the curb plate firmly reliable at its both ends, satisfy the atress stability requirement.

Optionally, 11 width of bottom plate can be 8 meters, and the width of roof 12 can be 6 meters, and bottom plate 11 and roof 12 can coaxial setting, the axis is the axis of bottom plate 11 and roof 12, and this kind of road bed structure is reliable and stable to whole width is narrower, has reduced the excavation volume of abrupt slope district, satisfies the atress stability requirement of road bed side slope.

In some embodiments, as shown in fig. 2, the inner wall surface of the connection between the top plate 12 and the first side plate 13 is provided with an inclined surface 121, and the arrangement of the inclined surface 121 increases the area of the cross section at the corner of the connection between the top plate 12 and the first side plate 13, prevents local stress concentration at the connection between the top plate 12 and the first side plate 13, and enhances the bearing capacity of the first side plate 13. Similarly, the inner wall surface of the joint of the top plate 12 and the second side plate 13 may also be provided with an inclined surface 122 to enhance the bearing capacity of the second side plate 14, and the inclined surfaces 121 and 122 are provided at the same time to enhance the symmetry of the stress of the first side plate 13 and the second side plate 14, thereby further enhancing the stability of the roadbed structure under stress.

Optionally, according to the influence of different inclined plane forms on stress and overall structure, by comparison and optimization, a structure that the inclined plane 121 and the inclined plane 122 can be set to have a vertical height of 0.2 m and a lateral width of 0.6 m is obtained, where the vertical height refers to the projection length of the inclined plane in the vertical direction in fig. 2, and the lateral width refers to the projection length of the inclined plane in the left-right direction in fig. 2.

In some embodiments, the inner wall surface of the junction of the bottom plate 1 and the first side plate 13 is provided as an inclined surface 111, and/or the inner wall surface of the junction of the bottom plate 11 and the second side plate 14 is provided as an inclined surface 112. The inner wall face of the joint of the bottom plate 11 and the first side plate 13 is an inclined face, the area of the cross section of the connecting structure of the bottom plate 11 and the first side plate 13 at the inner corner is increased, the local stress concentration of the joint of the top plate 12 and the first side plate 13 is prevented, and the bearing capacity of the bottom plate 11 is enhanced. Similarly, the inner wall surface of the joint of the bottom plate 11 and the second side plate 13 may also be set as the inclined surface 112 to further enhance the bearing capacity of the bottom plate 111, and the inclined surfaces 11 and 112 are simultaneously set to enhance the stress symmetry of the bottom plate and enhance the stress stability of the bottom plate.

Alternatively, the inclined surfaces 111 and 112 may be set to have a vertical height of 0.4 m and a lateral width of 0.4 m.

In some embodiments, the outer wall surface of the junction of the bottom plate 11 and the first side plate 13 is provided as an inclined surface 113, and/or the outer wall surface of the junction of the bottom plate 11 and the second side plate 14 is provided as an inclined surface 114. The outer wall surface of the joint of the bottom plate 11 and the first side plate 13 is provided with an inclined surface 113, so that the area of the cross section of the joint structure of the bottom plate 11 and the first side plate 13 at the outer corner is increased, the local stress concentration at the joint of the top plate 12 and the first side plate 13 is further prevented, and the bearing capacity of the bottom plate 111 is enhanced; in addition, the arrangement of the inclined surface 114 enhances the anti-overturning capability of the structure and improves the stability of the single-line box type roadbed structure. Also, the provision of the inclined surface 14 can further enhance the load-bearing capacity and the anti-overturning capacity of the bottom plate 11; and the inclined plane 113 and the inclined plane 114 are arranged at the same time, so that the stress symmetry of the bottom plate can be further enhanced, and the stress stability of the bottom plate can be further enhanced.

Alternatively, the vertical height of the inclined surfaces 113 and 114 may be 0.4 m, and the lateral height may be 0.4 m.

In some embodiments, as shown in fig. 2 and 3, there are a plurality of single-line box-type roadbed structures 1, and the plurality of single-line box-type roadbed structures 1 are assembled and connected along a length direction, which is a direction in which the size of the single-line box-type roadbed 1 is largest, that is, a left-right direction in 3. Each single-line box-type roadbed structure 1 can have a length of 10-15 m. The roadbed splicing connection mode reduces the roadbed construction difficulty and accelerates the construction progress; and the assembly connection mode reduces differential settlement after roadbed construction, reduces the internal stress of the roadbed, avoids cracking or deformation, and is favorable for improving the stress stability of the roadbed structure.

In some embodiments, as shown in fig. 3, a settlement joint 16 is provided between adjacent single-line box-type roadbed structures 1. Specifically, the seam width of the settlement joint 16 can be 20 millimeters, the arrangement of the settlement joint ensures that two adjacent single-line box type roadbed structures can freely settle, the single-line box type roadbed structures are prevented from generating uneven settlement due to uneven bearing capacity of a load or a steep slope foundation, irregular cracks are generated to cause damage to the roadbed structures, and the stability of the roadbed structures is ensured. A water stop belt can be arranged in the settlement joint to avoid water seepage of the settlement joint.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims (10)

1. A box roadbed structure of single line for abrupt slope district which characterized in that includes:

the bottom plate is horizontally arranged on the horizontal part of the steep slope surface;

a top plate disposed above the bottom plate;

the first side plate and the second side plate are arranged at intervals and are respectively connected with the bottom plate and the top plate to form a cavity with the bottom plate and the top plate;

the first side plate is provided with a first through hole communicated with the cavity, and the second side plate is provided with a second through hole communicated with the cavity.

2. The single-line box-type roadbed structure for the steep slope section according to claim 1, wherein the first through hole and the second through hole are coaxially arranged.

3. The single-line box-type roadbed structure for the steep slope section according to claim 1, wherein the width of the bottom plate is 7-9 m.

4. The single-line box-type roadbed structure for the steep slope section according to claim 1, wherein both ends of the bottom plate are at a predetermined distance from the first side plate and the second side plate.

5. The single-line box-type roadbed structure for the steep slope section according to claim 4, wherein the width of the top plate is smaller than that of the bottom plate, and two ends of the top plate are respectively connected with the first side plate and the second side plate.

6. The single-line box-type roadbed structure for the steep slope section according to claim 1, wherein an inner wall surface of a joint of the top plate and the first side plate is provided with an inclined surface, and/or an inner wall surface of a joint of the top plate and the second side plate is provided with an inclined surface.

7. The single-line box-type roadbed structure for the steep slope section according to claim 1, wherein an inner wall surface of a connection part of the bottom plate and the first side plate is provided with an inclined surface, and/or an inner wall surface of a connection part of the bottom plate and the second side plate is provided with an inclined surface.

8. The single-line box-type roadbed structure for the steep slope section according to claim 1, wherein an outer wall surface of a connection part of the bottom plate and the first side plate is provided with an inclined surface, and/or an outer wall surface of a connection part of the bottom plate and the second side plate is provided with an inclined surface.

9. The single-line box-type roadbed structure for the steep slope section according to claim 1, wherein the single-line box-type roadbed structure is provided in plurality, and the top plate of each single-line box-type roadbed structure is arranged on the same horizontal plane.

10. The single-line box-type roadbed structure for the steep slope section according to claim 9, wherein settlement joints are arranged between adjacent single-line box-type roadbed structures.

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