CN215714311U - Overhanging type pavement slab structure - Google Patents

Abstract

The utility model provides an overhanging type pavement slab structure which comprises an overhanging beam (3), wherein the overhanging beam (3) is horizontally and obliquely downwards connected with a first anchor bar pile (1) and a second anchor bar pile (12) towards the interior of a mountain, and the outer end of the overhanging beam (3) is fixedly connected with a bracket (7). The utility model solves the problem that the reserved width of the mountain-crossing highway can not meet the actual requirement or the road surface is narrowed due to landslide, has simple structure, convenient construction and high supporting strength, reduces the construction cost and enhances the traffic capacity of the mountain-crossing highway.

Description

Overhanging type pavement slab structure

Technical Field

The utility model relates to the technical field of pavement widening of mountain-by-mountains, in particular to an overhanging type pavement plate structure.

Background

In the construction of mountain roads, it is often necessary to excavate roads as main channels in mountainous areas, and the roads are built according to mountains and have steep slopes at the top and bottom. In engineering construction, the method has the characteristics of long construction period, multiple uncontrollable factors and the like. In the actual construction process, on one hand, the width of the reserved pavement part at the early stage of design cannot meet the actual construction requirement of the highway; on the other hand, the situation that the road surface of the later-stage highway construction is narrowed due to the fact that the slope body is subjected to local collapse under the action of external force is considered; when the above situation occurs, it is necessary to widen part of the road sections.

For the construction of a pavement width splicing section, the traditional solution comprises secondary excavation at the side of a mountain, widening of a retaining wall and backfilling of roadbed earthwork, if the secondary excavation at the side of the mountain is adopted, the height of a cut slope can reach dozens of meters, so that the engineering quantity is increased, and the safety risk is increased due to the secondary high cut slope excavation; if the retaining wall is built on the outer side to widen, the height of the retaining wall can reach dozens of meters, which also causes the increase of the engineering quantity; if roadbed earthwork is adopted for backfilling, the roadbed earthwork can invade a river channel, and the implementation is difficult when the slope of a side slope is large. Therefore, the above solution has many disadvantages in view of safety, economy and green construction requirements.

Based on the above situation, the utility model provides an overhanging type pavement slab structure, which can effectively solve the above problems.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide an overhanging type pavement slab structure. The utility model solves the problem that the reserved width of the mountain-crossing highway can not meet the actual requirement or the road surface is narrowed due to landslide, has simple structure, convenient construction and high supporting strength, reduces the construction cost and enhances the traffic capacity of the mountain-crossing highway.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

the utility model provides a formula of encorbelmenting road surface plate structure which characterized in that: the road deck structure includes cantilever beam, cantilever beam is to mountain level and slant first dowel pile and second dowel pile of connecting down, cantilever beam's outer end and bracket are connected fixedly.

Further: the cantilever beam is characterized in that a slope of a mountain below the cantilever beam is drilled and a support anchor rod is arranged, the support anchor rod extends in a suspended mode to the outer side of the mountain, the bracket comprises a steel plate die connected with the suspended extending part of the support anchor rod, the bracket is connected with a main cantilever beam rib of the cantilever beam, and the bracket and the cantilever beam are cast into a whole through concrete.

Further: the included angle between the support anchor rod and the steel plate die and the horizontal plane is alpha, and the alpha is between 30 and 40 degrees.

Further: and the steel plate die is connected with the cantilever beam main rib through the diagonal draw bar.

Further: the bracket top road section is an overhanging road section, and the width d of the overhanging road section is less than 2.5 m.

Further: the upper portions of the cantilever beams and the brackets are road surfaces, and anti-collision guardrails are arranged on the positions, close to the outer edges of the brackets, of the road surfaces.

Further: and one side of the road surface, which is close to the mountain body, is provided with a drainage ditch.

Further: the first anchor bar pile and the second anchor bar pile are welded and fixed with the cantilever beam main bar, the included angle between the second anchor bar pile and the horizontal plane is beta, and the beta is 60-75 degrees.

Further: and a concrete cushion is arranged between the bottom of the cantilever beam and the connecting plane.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

the bracket part is designed, so that the torsion of the cantilever beam is restrained, more importantly, the outer slope angle of the cantilever beam is protected, and the cantilever beam is prevented from being damaged due to compression. The utility model can be adjusted according to different splicing width and length, and has stronger adaptability. The utility model has the characteristics of stable structure and low construction difficulty, effectively avoids high retaining wall arrangement, roadbed integral backfilling or secondary excavation of a slope surface, reduces the engineering quantity and reduces the total construction investment.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a partial schematic view of fig. 1.

Reference numerals: 1-a first anchor bar pile, 2-a concrete cushion, 3-a cantilever beam, 4-a drainage ditch, 5-a pavement, 6-an anti-collision guardrail, 7-a bracket, 8-a diagonal reinforcement, 9-a steel plate die, 10-a support anchor bar, 11-a cantilever beam main reinforcement and 12-a second anchor bar pile.

Detailed Description

In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in conjunction with specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.

The utility model is further illustrated by the following figures and examples, which are not to be construed as limiting the utility model.

As shown in fig. 1 to 2, a formula of encorbelmenting road surface plate structure, road deck include cantilever beam 3, 3 bottoms of cantilever beam set up concrete cushion 2, cantilever beam 3 is to the mountain internal level and the oblique first dowel pile 1 of connecting downwards and second dowel pile 12, the outer end and the bracket 7 of cantilever beam 3 are connected fixedly.

The first anchor bar pile 1 is used for restraining the position of the cantilever beam 3 in the horizontal direction, and the second anchor bar pile 12 is used for restraining the rotation of the cantilever beam 3 under the action of torque force. First dowel pile 1 sets up a plurality of roots along 5 length direction on road surface, second dowel pile 12 has the multirow, and every row is provided with many, and every row of second dowel pile 12 is arranged along 5 length direction on road surface, and the interval is about 1 m. Through the anchoring effect of first anchor bar pile 1 and second anchor bar pile 12 to cantilever beam 3 two directions, improve overall structure's rationality and stability.

The cantilever beam comprises a cantilever beam 3 and is characterized in that a slope of a mountain below the cantilever beam 3 is drilled and provided with a support anchor rod 10, the support anchor rod 10 extends in a suspended mode to the outer side of the mountain, a bracket 7 comprises a steel plate die 9 connected with the suspended extending part of the support anchor rod 10, the bracket 7 is connected with a main cantilever beam rib 11 of the cantilever beam 3, and the bracket 7 and the cantilever beam 3 are cast into a whole through concrete.

The included angle between the support anchor rod 10 and the steel plate die 9 and the horizontal plane is alpha, and the alpha is between 30 and 40 degrees.

And the steel plate die 9 is connected with a cantilever beam main rib 11 through a diagonal brace 8.

The steel plate mold 9 has good stability under the combined action of the support anchor rods 10 and the diagonal draw bars 8, and after the cantilever beam 3 and the bracket 7 are poured, the steel plate mold 9 still remains, so that the support strength and the overall stability of the cantilever structure are improved.

The road section above the bracket 7 is an overhanging road section, and the width d of the overhanging road section is less than 2.5 m.

The upper portions of the cantilever beams 3 and the brackets 7 are road surfaces 5, and anti-collision guardrails 6 are arranged on the positions, close to the outer edges of the brackets 7, on the road surfaces 5.

And a drainage ditch 4 is arranged on one side of the pavement 5, which is close to the mountain body, and water is normally drained through the drainage ditch 4. The structure of the overhanging type pavement 5 plate inclines towards the side close to the mountain.

The first anchor bar pile 1 and the second anchor bar pile 12 are fixedly welded with the cantilever beam main bar 11, the included angle between the second anchor bar pile 12 and the horizontal plane is beta, and the beta is 60-75 degrees.

The manufacturing, installation and concrete pouring of the first anchor bar pile 1 and the second anchor bar pile 12 are completed in site construction, and the splicing length can be properly adjusted according to the concrete splicing width road section.

The construction steps of the overhanging road surface structure comprise the following steps:

s1, thoroughly cleaning sundries on the pre-spliced wide slope section before construction, cleaning and leveling the sundries, and then pouring high-strength concrete into the concrete cushion layer 2 to support the cantilever beam 3, wherein the thickness of the concrete cushion layer 2 is not less than 10 cm.

And S2, embedding the first anchor bar 1 pile into the slope body, and reserving enough anchoring length to meet the welding requirement with the cantilever beam main bar 11.

And S3, penetrating a plurality of second anchor bar piles 12 through the cushion layer 2 according to the angle beta, embedding the second anchor bar piles into the underlying foundation rock mass, reserving enough anchoring length in the same way, and fixing the second anchor bar piles with the cantilever beam main bars 11.

S4, pouring a bracket, drilling a support anchor rod 10 in a slope body below the suspended road section, paving a steel plate die 9 on the support anchor rod 10 after the support anchor rod 10 is installed, and welding the support anchor rod with a cantilever beam main rib 11 through a diagonal rib 8.

And S5, manufacturing and installing cantilever beam main ribs 11 of the cantilever beam 3 and bracket 7 structures, and performing reliable welding with related rod pieces, wherein the inclined stay bar 8 is fixed with the cantilever beam main ribs 11.

And S6, integrally pouring concrete on the cantilever beam 3 and the bracket 7 at the same time, and arranging a drainage ditch 4 at one side close to the mountain.

And S7, leveling the upper surface of the cantilever beam 3, and performing construction on the pavement 5 and installation of the anti-collision guardrail 6.

According to the description of the utility model and the accompanying drawings, a person skilled in the art can easily make or use an overhanging pavement slab structure of the utility model and can produce the positive effects described in the utility model.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.

Claims (9)

1. The utility model provides a formula of encorbelmenting road surface plate structure which characterized in that: the road deck structure includes cantilever beam (3), cantilever beam (3) are to connecting first dowel pile (1) and second dowel pile (12) under mountain internal level and the slant, the outer end and bracket (7) of cantilever beam (3) are connected fixedly.

2. An overhanging pavement slab structure according to claim 1, characterised in that: the cantilever beam is characterized in that a supporting anchor rod (10) is drilled and arranged on the slope surface of the mountain below the cantilever beam (3), the supporting anchor rod (10) extends in a suspended mode to the outer side of the mountain, a bracket (7) comprises a steel plate die (9) connected with the suspended extending part of the supporting anchor rod (10), the bracket (7) is connected with a cantilever beam main rib (11) of the cantilever beam (3), and the bracket (7) and the cantilever beam (3) are cast into a whole through concrete.

3. An overhanging pavement slab structure according to claim 2, characterised in that: the included angle between the support anchor rod (10) and the steel plate die (9) and the horizontal plane is alpha, and the alpha is 30-40 degrees.

4. An overhanging pavement slab structure according to claim 2, characterised in that: the steel plate die (9) is connected with the cantilever beam main rib (11) through the inclined stay bar (8).

5. An overhanging pavement slab structure according to claim 1, characterised in that: the road section above the bracket (7) is an overhanging road section, and the width d of the overhanging road section is less than 2.5 m.

6. An overhanging pavement slab structure according to claim 1, characterised in that: the upper portions of the cantilever beams (3) and the brackets (7) are road surfaces (5), and anti-collision guardrails (6) are arranged on the positions, close to the outer edges of the brackets (7), on the road surfaces (5).

7. An overhanging pavement slab structure according to claim 6, characterised in that: and one side of the road surface (5) close to the mountain body is provided with a drainage ditch (4).

8. An overhanging pavement slab structure according to claim 2, characterised in that: the first anchor bar pile (1) and the second anchor bar pile (12) are both welded and fixed with the cantilever beam main bar (11), the included angle between the second anchor bar pile (12) and the horizontal plane is beta, and the beta is 60-75 degrees.

9. An overhanging pavement slab structure according to claim 1, characterised in that: and a concrete cushion (2) is arranged at the bottom of the cantilever beam (3).

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