CN213772891U - Adopt compound filler structure's arched bridge structure - Google Patents

Abstract

The utility model discloses an arch bridge structure adopting a composite filler structure, which comprises a plurality of arch rings and a pavement layer paved on the arch rings, wherein a composite filler layer is arranged between the arch rings and the pavement layer; a V-shaped gap is formed between two adjacent arch rings, and the composite filler layer is filled into the V-shaped gap to form a compact structure; the composite filler layer comprises: a reinforced lightweight concrete layer; and the graded broken stone filler layer is laid above the reinforced light concrete layer. Can be widely applied to the technical field of the filler of the arch structure.

Description

Adopt compound filler structure's arched bridge structure

Technical Field

The utility model relates to an encircle and go up structural packing technical field. More specifically, the utility model relates to an adopt compound filler structure's arch bridge structure.

Background

Since the masonry arch bridge is curved, the vehicle cannot normally travel directly over the curve, and therefore load-transmitting elements and fillers, collectively referred to as "arch fillers", are required between the roadway system and the arch. The arch filler is usually made of local materials due to cost reasons, and is usually tamped by gravel, broken stone, coarse sand or pebble-clay; when the filler is not easy to obtain, the masonry type arch building is often changed, namely dry masonry or pouring plain concrete is adopted as the arch filler. The apparent density of the traditional arch filler is generally 1800-2450 kg/m³The self-weight is large, so that the arch ring generates large internal stress, which is not beneficial to the stress of the structure. And the self weight of the materials is increased after rainwater permeates, and the expansion of the filler can cause larger lateral pressure to the side wall, so that the side wall is easy to be causedCracking the wall; meanwhile, the seepage water is deposited on the arch ring to cause the steel bars at the cracks to be corroded, and the corroded steel bars expand to cause the concrete to be peeled off, so that the bearing capacity and the durability of the arch bridge are deteriorated, which also becomes an important reason for reducing the service life of the existing arch bridge.

In order to reduce the dead weight of the upper structure of the arch bridge, the arch crown filler is filled with single concrete.

In summary, the prior art has several technical drawbacks:

1) although the traditional arch filler such as gravel, broken stone and the like has good stability, the traditional arch filler is difficult to compact during construction, and the conditions of uneven compactness, integral structural rigidity and deformation of the arch filler are easily caused;

2) the single graded broken stone arch filler form ensures that the plate body property of the filler is poor and the diffusion capacity to the load of a bridge deck vehicle is also poor;

3) along with the increase of traffic volume, the effect that bridge structures receive the load increases, and the requirement to the intensity and the stability of filling on the arch also can improve gradually, especially along with the emergence of bridge floor pavement disease, also can improve gradually to the stability requirement of filling on the arch.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an adopt compound filler structure's arch bridge structure.

To achieve these objects and other advantages in accordance with the purpose of the present invention, there is provided an arch bridge structure using a composite packing structure, the arch bridge structure including a plurality of arch rings and a pavement layer laid on the plurality of arch rings, the arch rings and the pavement layer being further provided with a composite packing layer therebetween;

a V-shaped gap is formed between two adjacent arch rings, and the composite filler layer is filled into the V-shaped gap to form a compact structure;

the composite filler layer comprises:

a reinforced lightweight concrete layer;

and the graded broken stone filler layer is laid above the reinforced light concrete layer.

Preferably, addThe apparent density of the reinforced lightweight concrete packing layer is 500-1200 kg/m³。

Preferably, a first waterproof layer is further arranged between the reinforced light concrete layer and the graded broken stone filler layer, and a second waterproof layer is further arranged between the arch ring and the filler layer.

Preferably, the first waterproof layer comprises an asphalt layer and the second waterproof layer comprises an emulsified asphalt layer.

Preferably, the filler layer is laid at the arch crown position of the arch bridge, a saw kerf is arranged at the arch crown position along the transverse direction of the arch bridge, and a plurality of water seepage pipes are arranged in the saw kerf.

Preferably, the plurality of water seepage pipes are respectively positioned at the lowest position of the reinforced light concrete layer and the lowest position of the graded broken stone filler layer.

Preferably, the reinforced light concrete layer includes a foamed concrete structure having a plurality of pores therein, and a fibrous filler uniformly mixed in the pores.

Preferably, the pavement structure includes: laid from bottom to top in proper order: the graded broken stone light concrete packing layer, the broken stone layer, the cement layer, the third waterproof layer, the AC-20C asphalt concrete layer and the AC-13C asphalt concrete layer.

Preferably, the bottom of the reinforced light concrete layer is also provided with a C20 concrete arch protection layer.

The utility model discloses at least, include following beneficial effect:

1. on the premise of ensuring the strength and compactness of the filler, the self weight of the filler is reduced, the plate body effect of the arch structure is enhanced, and the strength, rigidity and integrity of the filler are improved.

2. The extrusion force of the fillers on the arch to the side wall is reduced, the diffusion capacity of the fillers on the arch to the bridge deck load is enhanced, and the bearing capacity of the fillers is improved.

3. The comprehensive drainage capacity and the deformation resistance of the arch structure and the bridge deck pavement are enhanced, and the problems of uneven settlement of the bridge deck of the arch bridge and the like are solved.

4. The foam concrete can utilize local industrial waste as a raw material, so that the recycling efficiency of the industrial waste is improved, and the aims of saving resources and reducing the life cycle cost of the bridge are fulfilled.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

FIG. 1 is an overall structure diagram of the present invention;

FIG. 2 is a cross-sectional view of the arch bridge structure using the composite filler structure of the present invention;

the specification reference numbers indicate: 1. the concrete comprises an arch ring, 2, a pavement layer, 3, a reinforced light concrete layer, 4, a graded broken stone filler layer, 5 and a first waterproof layer.

Detailed Description

The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.

In the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

As shown in fig. 1-2, an arch bridge structure using a composite filler structure includes a plurality of arch rings 1 and a pavement layer 2 laid on the arch rings 1, wherein a composite filler layer is further disposed between the arch rings 1 and the pavement layer 2;

a V-shaped gap is formed between two adjacent arch rings 1, and the composite filler layer is filled into the V-shaped gap to form a compact structure;

the composite filler layer comprises:

a reinforced light concrete layer 3;

and the graded broken stone filler layer 4 is laid above the reinforced lightweight concrete layer 3.

In the technical scheme, the reinforced light concrete layer 3 is prepared by pouring foam concrete, additives such as glass fiber and the like are added in the pouring process to enhance the overall toughness and strength of the reinforced light concrete layer, the foam concrete has good fluidity, the foam concrete does not contain coarse aggregate, so the foam concrete can be pumped by a pipeline for construction, and the fluidity can be controlled to be 150-200mm in order to meet the construction requirement. The maximum conveying distance of the cast-in-place foam concrete is 500m, the maximum pumping height can reach 40m, the cast-in-place foam concrete has good construction performance, vibration is not needed, or a small amount of vibration is needed, the construction efficiency can be improved, and the construction technical problem caused by construction difficulty is solved;

in the construction, reinforced lightweight concrete and graded broken stone filler are adopted, and in the structural form of the composite arch filler, the thinner graded broken stone filler layer 4 can be regarded as a flexible cushion layer at the lower part of a bridge deck or a flexible surface layer of the arch filler, and has enough flexibility and water stability; the reinforced lightweight concrete can be regarded as a base layer of the composite arch filler, and provides good strength, load transfer and rigidity transition effects for the arch bridge structure.

In another technical scheme, the apparent density of the reinforced lightweight concrete filler layer is 500-1200 kg/m³。

In another technical scheme, a first waterproof layer 5 is further arranged between the reinforced light concrete layer 3 and the graded broken stone filler layer 4, and a second waterproof layer is further arranged between the arch ring 1 and the filler layer.

In above-mentioned technical scheme, set up first waterproof layer 5 and second waterproof layer and prevent each structural layer mutual seepage, destroy original structural layer internal environment, and then cause the destruction of upper portion road surface structure.

In another technical solution, the first waterproof layer 5 includes an asphalt layer, and the second waterproof layer includes an emulsified asphalt layer.

In another technical scheme, the packing layer is paved at the arch crown position of the arch bridge, a saw kerf is arranged at the arch crown position along the transverse direction of the arch bridge, and a plurality of water seepage pipes are arranged in the saw kerf.

In another technical scheme, a plurality of the water seepage pipes are respectively positioned at the lowest position of the reinforced light concrete layer 3 and the lowest position of the graded broken stone filler layer 4.

In the technical scheme, saw cuts are transversely arranged along the bridge of the vault; and water seepage pipes are arranged at the lowest position of each filler between the two saw seams and on two sides of the side wall, and underground water of different structural layers is discharged through the water seepage pipes.

In another embodiment, the reinforced lightweight concrete layer 3 includes a foam concrete structure having pores therein, and a fiber filler uniformly mixed in the pores.

In another aspect, the pavement structure includes: laid from bottom to top in proper order: the graded broken stone light concrete packing layer, the broken stone layer, the cement layer, the third waterproof layer, the AC-20C asphalt concrete layer and the AC-13C asphalt concrete layer.

In another technical scheme, a C20 concrete arch protection layer is further arranged at the bottom of the reinforced light concrete layer.

In the technical scheme, the pavement layer 2 structure consists of a cement stabilized macadam base layer 9 with the thickness of 30cm, C40 cement concrete 10 with the thickness of 10cm, an AC-20C asphalt concrete lower surface layer 12 with the thickness of 6cm and an AC-13C asphalt concrete upper surface layer 13 with the thickness of 4 cm; 10cm thick C40 cement concrete 10 and 6cm thick AC-20C asphalt.

The first embodiment is as follows:

the foam concrete is also called as foaming cement, lightweight concrete and the like, and is a novel building energy-saving material which is waste-utilizing, environment-friendly, energy-saving, low in cost and non-combustible. The foam concrete is a concrete product which is formed by introducing air or gases such as nitrogen, carbon dioxide, oxygen and the like into concrete slurry according to application requirements in a chemical or physical mode and reasonably curing and forming, contains a large number of fine closed air holes and has considerable strength. The foamed concrete is usually produced by mechanically preparing foam from an aqueous solution of a foaming agent, adding the foam into slurry consisting of siliceous materials, calcareous materials, water, various additives and the like, and mixing, stirring, casting, molding and curing to obtain the porous material. The apparent density of the foam concrete is usually 300-1500kg/m3, the compressive strength range is 0.4-5.0MPa, the compressive modulus range is 80-1000MPa, and the foam concrete has various engineering characteristics of light dead weight, high fluidity, good self-standing property, capability of pumping and cast-in-place, rapid construction and the like, and is widely applied to various engineering fields. Foam concrete has found applications in many areas of construction and structural engineering due to its unique properties of low density, low thermal conductivity, high fluidity and self-compaction, as well as ease of production and relative low cost. For example: foam concrete is used for void filling and isolation, while high density is used for construction. Other applications for foam concrete include the production of lightweight bricks and precast slabs, fire and heat insulation, thermal and acoustic insulation, subgrade beds, trench restoration, soft foundation replacement and filling, and impact absorbing barriers for airports and regular traffic. Furthermore, it is the best material for hole filling, such as old sewers, storage tanks, basements, pipes and voids under the road surface, due to the good flow characteristics.

While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.

Claims (9)

1. An arch bridge structure adopting a composite filler structure comprises a plurality of arch rings and a pavement layer paved on the arch rings, and is characterized in that a composite filler layer is arranged between the arch rings and the pavement layer;

a V-shaped gap is formed between two adjacent arch rings, and the composite filler layer is filled into the V-shaped gap to form a compact structure;

the composite filler layer comprises:

a reinforced lightweight concrete layer;

and the graded broken stone filler layer is laid above the reinforced light concrete layer.

2. The arch bridge structure adopting the composite filler structure as claimed in claim 1, wherein the apparent density of the reinforced lightweight concrete filler layer is 500-1200 kg/m³。

3. The arch bridge structure adopting the composite type filler structure according to claim 1, wherein a first waterproof layer is further provided between the reinforced light concrete layer and the graded crushed stone filler layer, and a second waterproof layer is further provided between the arch ring and the filler layer.

4. The arch bridge structure using composite filler structure according to claim 3, wherein the first waterproof layer includes an asphalt layer, and the second waterproof layer includes an emulsified asphalt layer.

5. The arch bridge structure adopting the composite type packing structure as claimed in claim 1, wherein the packing layer is laid to the arch crown position of the arch bridge, sawcuts are arranged at the arch crown position along the transverse direction of the arch bridge, and a plurality of water seepage pipes are arranged in the sawcuts.

6. The arch bridge structure using the composite filler structure according to claim 5, wherein a plurality of the water seepage pipes are respectively located at the lowest position of the reinforced light concrete layer and the lowest position of the graded crushed stone filler layer.

7. The arch bridge structure using the composite filler structure according to claim 1, wherein the reinforced light concrete layer comprises a foam concrete structure body having a plurality of pores therein, and a fibrous filler uniformly mixed in the pores.

8. An arch bridge construction using composite filler construction according to claim 1, wherein the pavement layer comprises: laid from bottom to top in proper order: the graded broken stone light concrete packing layer, the broken stone layer, the cement layer, the third waterproof layer, the AC-20C asphalt concrete layer and the AC-13C asphalt concrete layer.

9. The arch bridge structure adopting the composite filler structure according to claim 1, wherein a C20 concrete arch protection layer is further provided at the bottom of the reinforced light concrete layer.

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