阅读说明：本技术 一种装配式钢木组合拱桥结构及其构建方法 (Assembled steel-wood combined arch bridge structure and construction method thereof ) 是由 贾慧娟 陈曦 刘致远 吴闯闯 翁茜茜 张思慧 于 2021-09-02 设计创作，主要内容包括：一种装配式钢木组合拱桥结构及其构建方法,本发明涉及桥梁建造技术领域,它由若干个空间十二面体依次相连而成；空间十二面体包含若干个角部连接件和结构杆件单元；角部连接件包含三向连接件和四向连接件；结构杆件单元包含单体结构杆和分体结构杆；分体结构杆为对称并利用榫卯结构活动插设连接的两个半圆柱体结构制成；同一个空间十二面体中相邻的三根单体结构杆均利用三向连接件连接；位于相邻的两个空间十二面体连接面位置处的五个四向连接件上均分别连接两根单体结构杆和两根分体结构杆。多样化,受力情况良好,且具有优异的结构稳定性,结合轻质高强材料,使得其自重轻,兼具空间利用率和造型优美的同时、打破传统桥梁结构形式。(The invention relates to an assembled steel-wood combined arch bridge structure and a construction method thereof, relating to the technical field of bridge construction, wherein the assembled steel-wood combined arch bridge structure is formed by sequentially connecting a plurality of space dodecahedrons; the space dodecahedron comprises a plurality of corner connecting pieces and structural rod piece units; the corner connectors comprise three-way connectors and four-way connectors; the structural rod piece unit comprises a single structural rod and a split structural rod; the split structural rods are made of two symmetrical semi-cylindrical structures which are movably inserted and connected by a tenon-and-mortise structure; three adjacent monomer structure rods in the same space dodecahedron are connected by a three-way connecting piece; five four-direction connecting pieces positioned at the connecting surface positions of two adjacent space dodecahedrons are respectively connected with two single structural rods and two split structural rods. The bridge has the advantages of diversification, good stress condition, excellent structural stability, light dead weight due to combination of light high-strength materials, space utilization rate, attractive appearance and breaking of the structural form of the traditional bridge.)

1. The utility model provides an assembled steel wood combination arched bridge structure which characterized in that: it is formed by connecting a plurality of space dodecahedrons in sequence; the space dodecahedron comprises a plurality of corner connecting pieces (1) and structural rod piece units (2);

the corner connector (1) comprises a three-way connector (1-1) and a four-way connector (1-2);

the structural rod piece unit (2) comprises a single structural rod (2-1) and a split structural rod (2-2); the split structural rods (2-2) are symmetrical and are made of two semi-cylindrical structures which are movably inserted and connected by a mortise and tenon structure;

three adjacent monomer structure rods (2-1) in the same space dodecahedron are connected by a three-way connecting piece (1-1);

five four-direction connecting pieces (1-2) positioned at the positions of the connecting surfaces of two adjacent space dodecahedrons are respectively connected with two single structural rods (2-1) and two split structural rods (2-2).

2. An assembled steel-wood composite arch bridge structure of claim 1, wherein: one of the plane frames in the two space dodecahedrons positioned at the two end parts is respectively fixed on the left bridge support (3) and the right bridge support (3).

3. An assembled steel-wood composite arch bridge structure of claim 1, wherein: the three-way connecting piece (1-1), the four-way connecting piece (1-2), the single structural rod (2-1) and the split structural rod (2-2) are all provided with bolt holes (4) in a penetrating mode.

4. An assembled steel-wood composite arch bridge structure of claim 1, wherein: each face of the space dodecahedron positioned at the arch crown position of the arch bridge structure is a regular pentagon plane frame.

5. A construction method of an assembled steel-wood combined arch bridge is characterized by comprising the following operation steps:

step one, in the structural design stage, determining corner connecting pieces (1) and size parameters of structural rod piece units (2) and the space construction and extension directions of a space dodecahedron required by an arch bridge according to topographic conditions and actual spans, and adjusting the number of the structural rod piece units (2); the specific operation is as follows:

firstly, determining the length of a structural rod unit (2), namely determining the main beam span of a bridge by knowing the specific span of a river, determining which scale space dodecahedron is selected after the main beam span is divided by the initial use number of the space dodecahedron, and determining the length of the structural rod unit (2) forming the space dodecahedron by geometric relationship;

secondly, determining the arch bridge rise according to the clear height requirement of the bridge channel, namely determining the arch bridge rise according to the position of the connecting surface of the adjacent space dodecahedron, thereby determining the arch curve of the arch bridge;

finally, according to the actual use requirement of the bridge, selecting a proper path in an arch space formed by the plurality of space dodecahedrons to lay the bridge deck, thereby realizing the passing function of the bridge;

in the construction and assembly stage, according to the number and the size of the split structural rods (2-2) and the four-way connecting pieces (1-2) which are respectively determined, a design drawing is transmitted to a prefabricated structure processing factory, and the factory completes the whole prefabrication of the three-way connecting pieces (1-1), the four-way connecting pieces (1-2), the single structural rods (2-1) and the split structural rods (2-2) required by construction according to the drawing;

during actual construction, assembling can be started after the three-way connecting piece (1-1), the four-way connecting piece (1-2), the single structural rod (2-1) and the split structural rod (2-2) are transported to the site; because the structural form is a centrosymmetric structure, two sides of the bridge support (3) are assembled and constructed from bottom to top at the same time, namely, a first space dodecahedron is arranged from the bridge support (3), and the connection surface of the first space dodecahedron enters the construction of a second space dodecahedron by utilizing five four-way connecting pieces (1-2) and five split structural rods (2-2), and then the installation of half-span structures on two sides of the arch bridge is completed according to a construction drawing; and installing the last space dodecahedron in the midspan at the center positions of the two half-span bridges, and respectively connecting the two half-span bridges which are mutually in central symmetry to finally finish the construction of the arch bridge.

Technical Field

The invention relates to the technical field of bridge construction, in particular to an assembled steel-wood combined arch bridge structure and a construction method thereof.

Background

A bridge is a structure constructed to span obstacles and is mainly classified into a girder bridge, a truss bridge, an arch bridge, a cable-stayed bridge, a suspension bridge, etc. according to form and construction. The current bridge structural style is more traditional, lacks the breakthrough.

Disclosure of Invention

The invention aims to provide an assembled steel-wood combined arch bridge structure and a construction method thereof aiming at the defects and shortcomings of the prior art, the assembled steel-wood combined arch bridge structure is diversified, has good stress condition and excellent structural stability, is combined with light-weight high-strength materials, has light dead weight, has space utilization rate and attractive appearance, and breaks through the structural form of the traditional bridge.

In order to achieve the purpose, the assembled steel-wood combined arch bridge structure is formed by sequentially connecting a plurality of space dodecahedrons; the space dodecahedron comprises a plurality of corner connecting pieces and structural rod piece units;

the corner connectors comprise three-way connectors and four-way connectors;

the structural rod piece unit comprises a single structural rod and a split structural rod; the split structural rods are made of two symmetrical semi-cylindrical structures which are movably inserted and connected by a tenon-and-mortise structure;

three adjacent monomer structure rods in the same space dodecahedron are connected by a three-way connecting piece;

five four-direction connecting pieces positioned at the connecting surface positions of two adjacent space dodecahedrons are respectively connected with two single structural rods and two split structural rods.

Preferably, one of the planar frames of the two space dodecahedrons at the two end portions is fixed to the left and right bridge supports, respectively.

Preferably, the three-way connecting piece, the four-way connecting piece, the single structural rod and the split structural rod are all provided with bolt holes in a penetrating mode.

Preferably, each face of the space dodecahedron located at the arch position of the arch bridge structure is a regular pentagonal planar frame.

The invention relates to a construction method of an assembled steel-wood combined arch bridge, which comprises the following operation steps:

step one, in a structural design stage, determining corner connecting pieces, size parameters of structural rod piece units and space construction and extension directions of a space dodecahedron required by an arch bridge according to topographic conditions and actual spans, and adjusting the number of the structural rod piece units; the specific operation is as follows:

firstly, determining the length of a structural rod unit, namely determining the main girder span of a bridge by knowing the specific span of a river, determining which scale of space dodecahedron is selected after the main girder span L is divided by the initial use number of the space dodecahedron, and determining the length of the structural rod unit forming the space dodecahedron by geometric relationship;

secondly, determining the arch bridge rise H according to the clear height requirement of the bridge channel, namely determining the arch bridge rise H according to the position of the connecting surface of the adjacent space dodecahedron, thereby determining the arch curve of the arch bridge;

finally, according to the actual use requirement of the bridge, selecting a proper path in an arch space formed by the plurality of space dodecahedrons to lay the bridge deck, thereby realizing the passing function of the bridge;

secondly, in the construction and assembly stage, according to the number and the size of the split structural rods and the four-way connecting pieces which are respectively determined, a design drawing is transmitted to a prefabricated structure processing factory, and the factory completes the whole prefabrication of the three-way connecting pieces, the four-way connecting pieces, the single structural rods and the split structural rods which are required by construction according to the drawing;

step three, during actual construction, after the three-way connecting piece, the four-way connecting piece, the single structural rod and the split structural rod are transported to the site, assembling can be started; because the structural form is a centrosymmetric structure, two sides of the bridge support are assembled and constructed from bottom to top at the same time, namely a first space dodecahedron is arranged from the bridge support, and the construction of a second space dodecahedron is carried out on the connecting surface of the first space dodecahedron by utilizing five four-way connecting pieces and five split structural rods, and then the installation of half-span structures on two sides of the arch bridge is completed according to a construction drawing; and installing the last space dodecahedron in the midspan at the center positions of the two half-span bridges, and respectively connecting the two half-span bridges which are mutually in central symmetry to finally finish the construction of the arch bridge.

Compared with the prior art, the invention has the beneficial effects that:

1. through the construction of the structural rod units and the diversified free splicing in the formed space polyhedron, namely the assembly type connection is carried out in each surface direction of the space polyhedron, the variability of the rise, the span and the bridge deck amplitude extension of the final bridge structure can be realized, and the defects of over planarization and simplification of the traditional bridge structure are overcome;

2. the method provides a structural rod unit assembly type arch bridge assembly concept, namely novel bridge structures can be assembled by using unitized wood structural rod system units, and the assembly rule of various plane forms or space polyhedron construction which can be formed by the unitized assembly concept is further developed and utilized, so that novel bridge forms with more novel structures are designed;

3. the arch bridge structure formed by splicing the structural rod units is provided, under the condition of keeping the space structure unchanged, the whole size change can be adjusted according to the requirement of actual engineering on the use space, the bridge span problem and the bridge environment region complexity problem can be better solved, and the structural space utilization rate and the environment adaptability are improved;

4. the bridge structure has good building space, meanwhile, the structure of the regular polyhedron is stable, the force-bearing and force-transferring path is reasonable, and the bridge structure has good structural performance advantages;

5. the cross section of the bridge structural unit body adopts solid wood rods (single structural rods and split structural rods) with circular cross sections, the self weight of the bridge is greatly reduced in the structural form of a rod system, the utilization space of the upper structure of the bridge is also enlarged, and meanwhile, the rod system structure can greatly meet the flood prevention and flood discharge requirements of the bridge;

6. the bridge is an assembled steel-wood structure bridge, and the structural rod piece units are wood rods, so that each structural rod piece unit can be prefabricated in a factory, and the rapid assembly is convenient in a construction site; meanwhile, corner connecting pieces made of steel are adopted at the connecting nodes of the structural rod piece units, and are used for connecting all the intersecting rod systems in the space and connecting the reinforcing nodes through bolts; in addition, the split structure rods adopted at the connecting surfaces are connected by bolts while retaining the wood structure mortise-tenon joint connection and reducing the corresponding node connection, so that the split structure rods have high industrialization, mechanization and assembly performances, the construction efficiency is improved, and the connecting strength and rigidity are also enhanced.

Description of the drawings:

fig. 1 is a schematic structural view of the present invention.

FIG. 2 is a schematic view of a single structural rod according to the present invention.

Fig. 3 is a schematic structural view of the split structural rod of the present invention.

Fig. 4 is a schematic view showing the structure of the three-way connecting member of the present invention.

Fig. 5 is a schematic view of the structure of the four-way connector of the present invention.

Fig. 6 is a schematic view of the connecting surface of the spacial dodecahedron of the present invention and the corner connecting member at the position of the connecting surface.

Description of reference numerals:

the structure comprises corner connecting pieces 1, three-way connecting pieces 1-1, four-way connecting pieces 1-2, structural rod piece units 2, single structural rods 2-1, split structural rods 2-2, bridge supports 3 and bolt holes 4.

The specific implementation mode is as follows:

the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings, and the preferred embodiments in the description are only examples, and all other embodiments obtained by those skilled in the art without any inventive work belong to the protection scope of the present invention.

As shown in fig. 1 to 6, the fabricated steel-wood composite arch bridge structure according to the present embodiment is formed by sequentially connecting a plurality of space dodecahedrons; the space dodecahedron comprises a plurality of corner connecting pieces 1 and structural rod piece units 2;

the corner connector 1 comprises a three-way connector 1-1 and a four-way connector 1-2;

the structural rod piece unit 2 comprises a single structural rod 2-1 and a split structural rod 2-2; the split structural rods 2-2 are made of two symmetrical semi-cylindrical structures which are movably inserted and connected by a tenon-and-mortise structure, namely, tenon-and-mortise grooves and tenon-and-mortise blocks which are inserted and connected with each other are respectively arranged on the connecting surfaces of the two semi-cylindrical structures;

the three-way connecting piece 1-1, the four-way connecting piece 1-2, the single structural rod 2-1 and the split structural rod 2-2 are all provided with bolt holes 4 in a penetrating manner;

three adjacent monomer structure rods 2-1 in the same space dodecahedron are connected by a three-way connecting piece 1-1, and the connecting parts are connected and fixed by bolts;

five four-way connecting pieces 1-2 positioned at the connecting surface positions of two adjacent space dodecahedrons are respectively connected with two single structural rods 2-1 and two split structural rods 2-2, and the connecting positions are connected and fixed by bolts.

Preferably, one of the planar frames of the two space dodecahedrons at the two end portions is fixed to the left and right bridge supports 3 by means of bolt connection.

Preferably, each face of the space dodecahedron located at the arch crown position of the arch bridge structure is a regular pentagonal planar frame.

The construction method of the assembled steel-wood combined arch bridge in the specific embodiment comprises the following operation steps:

step one, in a structural design stage, determining the size parameters of corner connecting pieces 1 and structural bar units 2 required by an arch bridge and the space construction and extension directions of a space dodecahedron according to topographic conditions and actual spans, and adjusting the number of the structural bar units 2; the specific operation is as follows:

firstly, determining the length of the structural rod unit 2, namely determining the main girder span of the bridge by knowing the specific span of the river, determining which scale of the space dodecahedron is selected after the main girder span L is divided by the initial use number of the space dodecahedron, and determining the length of the structural rod unit 2 forming the space dodecahedron by geometric relationship;

secondly, determining the arch bridge rise H according to the clear height requirement of the bridge channel, namely determining the arch bridge rise H according to the position of the connecting surface of the adjacent space dodecahedron, thereby determining the arch curve of the arch bridge;

finally, according to the actual use requirement of the bridge, selecting a proper path in an arch space formed by the plurality of space dodecahedrons to lay the bridge deck, thereby realizing the passing function of the bridge;

secondly, in the construction and assembly stage, according to the number and the size of the split structural rods 2-2 and the four-way connecting pieces 1-2 which are respectively determined, a design drawing is transmitted to a prefabricated structure processing factory, and the factory completes the whole prefabrication of the three-way connecting pieces 1-1, the four-way connecting pieces 1-2, the single structural rods 2-1 and the split structural rods 2-2 required by construction according to the drawing;

step three, during actual construction, after the three-way connecting piece 1-1, the four-way connecting piece 1-2, the single structural rod 2-1 and the split structural rod 2-2 are transported to the site, assembling can be started; because the structural form is a centrosymmetric structure, two sides of the bridge support 3 are assembled and constructed from bottom to top at the same time, namely a first space dodecahedron is arranged from the bridge support 3, and the construction of a second space dodecahedron is carried out on the connecting surface of the first space dodecahedron by utilizing five four-way connecting pieces 1-2 and five split structural rods 2-2, and then the installation of half-span structures on two sides of the arch bridge is completed according to a construction drawing; and installing the last space dodecahedron in the midspan at the center positions of the two half-span bridges, and respectively connecting the two half-span bridges which are mutually in central symmetry to finally finish the construction of the arch bridge.

After adopting above-mentioned structure, this embodiment's beneficial effect is as follows: the space dodecahedron at the center of the bridge in the specific embodiment is still a dodecahedron formed by splicing plane pentagons formed by corner connectors and structural rod units on all surfaces, the structure of the space dodecahedron is equivalent to that of an arch center part in an arch bridge, the structural principle of the space dodecahedron uses the cell growth idea for reference, namely two opposite surfaces of two centrosymmetric half-span bridge structures are used as connecting surfaces, and the space dodecahedron for connecting the two half-span bridges is formed according to the growth forming mode of the regular dodecahedron; each surface of the space dodecahedron of the middle vault is a regular pentagon, and the size of the space dodecahedron can be determined according to the geometric relationship for prefabrication and installation; the assembled steel-wood polyhedral combined arch bridge structure is suitable for small and medium-sized pedestrian arch bridges, the load borne by the structure is mainly pedestrian load, the effect is small and uncomplicated, and meanwhile, the assembled steel-wood polyhedral combined arch bridge structure has the advantages of small wood structure mass, good elasticity, high grain following strength and good earthquake resistance, so that the assembled steel-wood polyhedral combined arch bridge structure has excellent mechanical properties.

It will be appreciated by those skilled in the art that modifications and equivalents may be made to the embodiments described above, and that various modifications, equivalents, improvements and the like may be made without departing from the spirit and scope of the invention.