CN212247715U

CN212247715U - Fill roadbed structure with subtract shock insulation effect

Info

Publication number: CN212247715U
Application number: CN202020792846.4U
Authority: CN
Inventors: 张东卿; 沈均; 周文洋; 陈劲; 张硕; 张涛; 冯子亮; 李睿; 姜瑞雪; 肖杭
Original assignee: China Railway Eryuan Engineering Group Co Ltd CREEC
Current assignee: China Railway Eryuan Engineering Group Co Ltd CREEC
Priority date: 2020-05-13
Filing date: 2020-05-13
Publication date: 2020-12-29
Anticipated expiration: 2030-05-13

Abstract

The utility model relates to a roadbed structure field, concretely relates to fill roadbed structure with subtract shock insulation effect, fill body, roof and support including top-down sets gradually, the support distributes on the soil body. The filling body is a main body structure for bearing load of a filling roadbed structure; the support separates the filling body from the ground movement which can cause damage as far as possible, thereby avoiding the damage caused by direct stress of the roadbed structure and overlarge vibration acceleration generated by earthquake and improving the earthquake resistance of the roadbed structure; the top plate is used for supporting the filling body on one hand, and is paved on the top of the support on the other hand, so that the stress concentration of the top of the support on the filling body is avoided, and the stress performance of the roadbed structure is better.

Description

Fill roadbed structure with subtract shock insulation effect

Technical Field

The utility model relates to a roadbed structure field, especially a fill roadbed structure with subtract shock insulation effect.

Background

Earthquake disasters frequently occur in China, a large number of railway and highway subgrades penetrate through high-intensity earthquake areas, and the subgrades are easily damaged under the action of earthquakes. Due to the fact that the vibration acceleration of the earthquake is too large, the filled roadbed structure is prone to damage such as slope instability sliding, overall roadbed collapse or cracking and the like, and the road cannot be used normally. And for railways and highways after an earthquake, the earthquake-resistant road is a life line for emergency rescue and disaster relief, and the efficiency of emergency rescue and disaster relief is seriously influenced by the damage of the roadbed. Therefore, the filled roadbed structure with good anti-seismic effect needs to be researched urgently.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: aiming at the problem that the filled roadbed structure in the prior art is easy to damage side slope instability sliding, overall roadbed collapse or cracking and the like under the action of earthquake, so that the road cannot be normally used, the filled roadbed structure with the seismic reduction and isolation effect is provided, and the seismic performance of the roadbed structure is improved.

In order to realize the purpose, the utility model discloses a technical scheme be:

a fill roadbed structure with seismic isolation and reduction effects comprises a filling body, a top plate and supports, wherein the filling body, the top plate and the supports are sequentially arranged from top to bottom, and the supports are distributed on a soil body. The support has enough vertical rigidity and horizontal rigidity, and the filled roadbed structure is ensured not to generate harmful deformation and vibration in a normal use state.

The filling body is a main body structure for bearing load of a filling roadbed structure; the support separates the filling body from the ground movement which can cause damage as far as possible, thereby avoiding the direct stress of the roadbed structure and the damage caused by overlarge vibration acceleration generated by earthquake, and improving the earthquake resistance of the roadbed structure; the top plate is used for supporting the filling body on one hand, and is paved on the top of the support on the other hand, so that the stress concentration of the top of the support on the filling body is avoided, and the stress performance of the roadbed structure is better.

In addition, the positions of the supports are reasonably arranged, so that the basic period of the filling roadbed structure can be prolonged, and the range of seismic energy concentration is avoided; the basic period of the filling roadbed structure can be adjusted by adjusting the number of the supports, so that the filling roadbed structure is suitable for earthquakes of different levels.

As the preferred scheme of the utility model, the support can be cylinder or boss body, like cylinder, prism, round platform, frustum etc. and bearing capacity is strong, the atress performance is good.

As the utility model discloses an optimal scheme, the filling body is the layering filling structure, is equipped with geotechnological cloth between the adjacent two-layer of filling body, is favorable to strengthening the bulk strength and the stability of road bed filling body.

Further, as the utility model discloses a preferred scheme, geotechnological cloth is equipped with the turn-up in the road bed both sides, and the turn-up is that geotechnological cloth is located the marginal part of road bed both sides and is wrapping up the structural style of adjacent upper strata filling body to compress tightly this layer of geotechnological cloth turn-up part by upper portion geotechnological cloth and filling body structure. The reverse bag is used for restraining the filler in the filling body, and is beneficial to enhancing the structural integrity and stability of the roadbed filling body.

As the preferred scheme of the utility model, the length of turning up is more than or equal to 2m, is favorable to filling the stable in structure.

As the preferred scheme of the utility model, be equipped with the bottom plate between support and the soil body, make the support have a high strength, the neat basis of placing in surface.

As the utility model discloses a preferred scheme is equipped with the bed course under the bottom plate, and the bed course comprises the road bed filler, and the bed course top surface is in same height, and the primary function of bed course is for the bottom plate provides level and smooth, stable basis.

As the utility model discloses an optimal scheme, roof and/or bottom plate are cast-in-place reinforced concrete structure, guarantee placing the basis intensity height, construction convenience, economy of support.

As the preferred scheme of the utility model, the top plate and/or the bottom plate are/is laid along the longitudinal direction of the line, gaps are reserved at intervals, and asphalt boards are arranged in the gaps; the gap is used for adapting to uneven deformation, and the whole gap is filled with the asphalt wood board to support a filling body in the gap range so as to avoid infiltration.

As the preferred scheme of the utility model, the length that roof and/or bottom plate surpass the filling body both sides is more than or equal to 1 m. And reserving a safety distance for the filling body on two sides of the transverse direction of the line, so that the filling body is still completely positioned in the range of the top plate after being stressed and deformed, and the bottom plate is adapted to the top plate.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. the utility model discloses to fill the body and separate as far as possible with the ground motion that probably arouses destruction, avoid the direct atress of roadbed structure, produce because of the produced vibration acceleration of earthquake too big and destroy, improved roadbed structure's anti-seismic performance, be favorable to reducing and shake back restoration work load, help shaking the back and speedily carrying out rescue work and relief work.

2. The utility model discloses accessible rational arrangement support position, the basic cycle of road bed structure is filled in the extension, and then avoids the concentrated scope of seismic energy, reduces the destruction influence of seismic force to road bed structure is filled in.

3. The utility model discloses the number of accessible adjustment support, the basic cycle of adjustment fill roadbed structure to adapt to the earthquake of different ranks.

Drawings

FIG. 1 is a schematic cross-sectional view of a roadbed structure with seismic isolation and reduction effects.

Icon: 1-filling body, 11-geotextile, 2-top plate, 3-bottom plate, 4-support, 5-cushion layer and 6-soil body.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Example 1

A fill subgrade structure with seismic isolation and reduction effects is shown in figure 1, and is sequentially provided with a filling body 1, a top plate 2, a support 4, a bottom plate 3 and a cushion layer 5 from top to bottom. The support 4 is cylindrical and is spaced between the top plate 2 and the bottom plate 3. The support 4 has enough vertical rigidity and horizontal rigidity, and the filled roadbed structure is ensured not to generate harmful deformation and vibration in a normal use state.

Specifically, the cushion 5 is located on the ground soil body 6 and filled with roadbed qualified filler, generally graded broken stones, the thickness of the cushion is not less than 0.3m, and the top surfaces of the cushion 5 are at the same height so as to lay the bottom plate 3.

The bottom plate 3 is positioned on the cushion layer 5 and is formed by cast-in-place of reinforced concrete, so that the support 4 has a high-strength placing foundation with a neat surface; the bottom plate 3 is laid along the longitudinal direction of the line, and is disconnected at intervals of 20m, and a gap is reserved. The length of the bottom plate 3 beyond both sides of the filling body 1 is not less than 1 m.

The top plate 2 is arranged at the bottom of the filling body 1, laid at the top of the support 4 and cast in situ by reinforced concrete; the top plate 2 is laid along the longitudinal direction of the line, and is disconnected at intervals of 20m, and a gap is reserved. The length of the top plate 2 beyond both sides of the filling body 1 is not less than 1 m. The top plate 2 is adapted to the length of the bottom plate 3.

Gaps between the top plates 2 and gaps between the bottom plates 3 are used for adapting to uneven deformation of a roadbed structure, the whole gaps are filled with asphalt wood boards, and filling bodies 1 in the gap range are supported so as to avoid infiltration.

The support 4 is located between the top plate 2 and the bottom plate 3, and the filling 1 is separated from the ground which may cause damage by the support 4. The support 4 can adopt a layered rubber support or a lead rubber support. The number of seats 4 is determined according to the following equation:

wherein N is the number of the supports, F is the embankment fill load and the upper vehicle load, F₀Is the vertical bearing capacity of a single support.

As a main structure of the roadbed structure for bearing load, the filling body 1 is filled by adopting roadbed qualified filling materials in a layered mode. And a layer of high-strength geotextile 11 is laid every 0.6m in the filling body 1, so that the overall strength of the filling body 1 is enhanced. The geotextile 11 is longitudinally laid along the line, and the strength is not less than 200 kN/m. The geotextile 11 is provided with reverse bags at two sides of the roadbed, the reverse bags are in a structural form that the edge parts of the geotextile 11 at two sides of the roadbed wrap the adjacent upper-layer filling body 1, and the reverse bags of the geotextile 11 are compacted by the upper geotextile 11 and the filling body 1. The reverse bag is used for restraining the filler in the filling body 1, and is beneficial to enhancing the structural integrity and stability of the roadbed filling body 1. Wherein the length of the anti-packet is greater than or equal to 2 m.

The filling body 1 is a main body structure for bearing load of a filling roadbed structure; the support 4 separates the filling body 1 from ground movement which can cause damage as much as possible, thereby avoiding the damage caused by direct stress of the roadbed structure and overlarge vibration acceleration generated by earthquake and improving the anti-seismic performance of the roadbed structure; the top plate 2 is used for supporting the filling body 1 on one hand and is laid on the top of the support 4 on the other hand, so that the stress concentration of the top of the support 4 on the filling body 1 is avoided, and the stress performance of the roadbed structure is better.

In addition, the positions of the supports 4 are reasonably arranged, so that the basic period of a filling roadbed structure can be prolonged, and the range of seismic energy concentration can be avoided; the basic period of the filling roadbed structure can be adjusted by adjusting the number of the supports 4, so that the filling roadbed structure is suitable for earthquakes of different levels.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The filling roadbed structure with the seismic isolation and reduction effect is characterized by comprising a filling body (1), a top plate (2) and supports (4) which are sequentially arranged from top to bottom, wherein the supports (4) are distributed on a soil body (6).

2. A fill roadbed structure according to claim 1, characterized in that the carriers (4) are in the shape of cylinders or bosses.

3. A filled subgrade structure according to claim 1, characterized in that the filling body (1) is a layered filling structure, and a geotextile (11) is arranged between two adjacent layers of the filling body (1).

4. A filled subgrade structure according to claim 3, characterized in that the geotextile (11) is provided with turn-ups on both sides of the subgrade.

5. The fill roadbed structure of claim 4, wherein the length of the turn-up is greater than or equal to 2 m.

6. A filling substructure according to any of the claims 1 to 5, characterized in that a bottom plate (3) is provided between the supporting base (4) and the soil body (6).

7. The embankment foundation structure according to claim 6, further comprising a bedding layer (5) under said bottom slab (3), said bedding layer (5) being made of a roadbed filling, and top surfaces of said bedding layer (5) being at the same height.

8. A filled subgrade structure according to claim 6, characterized in that said top plate (2) and/or said bottom plate (3) are cast-in-place reinforced concrete structures.

9. A fill roadbed structure according to claim 6, characterized in that the top slabs (2) and/or the bottom slabs (3) are laid in the longitudinal direction of the track with gaps at intervals, and that asphalt wood slabs are placed in the gaps.

10. A filled subgrade structure according to claim 6, characterized in that the length of the top plate (2) and/or the bottom plate (3) beyond both sides of the filling body (1) is greater than or equal to 1 m.