CN106638255A - Modern bamboo pedestrian cantilever beam bridge - Google Patents

Abstract

The invention discloses a modern bamboo pedestrian cantilever beam bridge, which comprises at least two bridge piers, a main beam arranged above the bridge piers and railings arranged on both sides of the main beam, and is characterized in that the main beam and the railings are all made of recombined bamboo The material is made, and also includes a support structure made of recombined bamboo material, the support structure is arranged between the pier and the main girder, and the cross-sectional area of the support structure in the horizontal direction gradually increases from bottom to top. The invention has the characteristics of good overall performance, less material, light weight and convenient construction, and the obtained cantilever beam bridge has the advantages of greenness, low carbon, environmental protection and economy.

Description

A modern bamboo pedestrian cantilever bridge

technical field

The invention relates to the technical field of bridge structures; in particular, it relates to a modern bamboo pedestrian cantilever bridge.

Background technique

Recombined bamboo, also known as heavy bamboo, is a new bamboo material that reorganizes and strengthens bamboo. Dipping, then drying to the required moisture content, and then laying in the mold, the profile formed by heat curing under high temperature and high pressure has the advantages of renewability, good toughness, high strength, etc., and has broad development prospects. In my country, the bamboo industry has maintained rapid growth year after year. Innovative enterprises, new technologies, and new products are constantly emerging. The enthusiasm for developing and utilizing bamboo resources in various places is very high. However, the rational use and development of bamboo resources can replace wood and protect forest resources, so more and more attention has been paid to it. And applying heavy bamboo to the field of civil engineering technology to replace steel and concrete can not only protect the environment, but also promote the development of the bamboo industry.

Simply supported girder bridges are widely used in the field of bridge construction due to their simple structure and convenient erection. One or both ends of a simply supported girder bridge extend outward from the fulcrum to form a cantilever bridge. The mechanical performance of the cantilever beam bridge is better than that of the simply supported beam bridge, and it can be applied to the bridge scheme with a larger span. The bending moment produces a favorable unloading effect, which can also reduce the height of the main girder, reduce the amount of materials and the self-weight of the structure, and improve the spanning capacity of the bridge. The superstructure of a cantilever beam bridge consists of anchor holes, cantilevers and suspension holes. The cantilever end of a cantilever beam bridge is easy to deflect under load, and there are cracks at the negative moment.

Therefore the applicant thinks, if can design a kind of this modern bamboo pedestrian cantilever bridge that adopts recombined bamboo as material to make, then can replace reinforced concrete material with bamboo material, to reduce cost, expand recombined bamboo application range, simultaneously, in this design During the process, it is necessary to consider how to simplify the construction process, improve the structural strength, and ensure the quality of the bridge.

Contents of the invention

Aiming at the deficiencies in the above-mentioned prior art, the technical problem to be solved by the present invention is: how to provide a modern bamboo pedestrian cantilever beam bridge made of recombined bamboo material, which is simple and fast in construction, high in structural strength, and stable and reliable in bridge quality, so that it can be obtained The pedestrian cantilever beam bridge has the characteristics of green, low carbon and environmental protection, and meets the needs of normal use and durability of the bridge structure.

In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:

A modern bamboo pedestrian cantilever bridge, comprising at least two piers, a main girder above the pier and railings arranged on both sides of the main girder, characterized in that the main girder and railings are all made of recombined bamboo materials, It also includes a support structure made of recombined bamboo material, the support structure is arranged between the pier and the main girder, and the cross-sectional area of the support structure in the horizontal direction gradually increases from bottom to top.

In the present invention, the recombined bamboo material is applied to the pedestrian cantilever beam bridge, which has the characteristics of green, low carbon, and environmental protection. It is especially used to make a support structure, which has good compressive performance, and the support structure adopts a structural form with a small bottom and a large top , using a number of standardized small-section bamboo girders criss-crossed to form a whole with a large section size, which reduces the weight of the bridge body and the amount of materials used, can withstand a large bearing capacity, and can better integrate the main girder. The stress transmitted to the bridge piers increases the stability of the cantilever beam bridge and prolongs the service life, and the components used can be made of recombined bamboo materials in advance according to the drawings in the bamboo processing factory, and then transported to the construction site for construction, making the cantilever beam bridge The construction is simple and fast, and meets the needs of normal use and durability of cantilever beam bridges.

As an optimization, each bridge pier includes two uprights respectively arranged on both sides of the main girder and a crossbeam erected between the two uprights, and each upper part of the opposite side of the two uprights has a concave installation step, Both ends of the crossbeam are fixedly installed on the installation steps, and both the upright column and the crossbeam are made of recombined bamboo material.

In this way, the pier is made of recombined bamboo material, which is low-carbon, environmentally friendly and low-cost; the pier is divided into three parts and processed separately and transported to the site for assembly, which makes the construction convenient and fast, and can reduce the construction period and construction difficulty. The upper installation steps enable the cantilever beam bridge to withstand greater loads without failure, improving the strength and bearing capacity of the bridge.

As an optimization, an angle plate with an L-shaped cross-section is installed at the junction line formed after the end of the beam is attached to the surface of the column installation step, and the two sides of the angle plate are respectively connected to the surface of the end of the beam. And the surface of the column mounting step is bonded and fixedly connected by bolts, and a rib plate is arranged between the two vertical surfaces of the corner plate.

In this way, the two fitting surfaces can be better connected, the reliability of the connection between the two fitting surfaces can be ensured, and the relative position change between the beam and the column can be better avoided when the load is applied, and the stability of the cantilever beam bridge can be improved. sex.

As an optimization, an installation base made of reinforced concrete material is provided under the column, and the installation base is a trapezoid whose bottom area is larger than the top area, and an installation chamber with an upward opening is formed on the upper part of the trapezoid, and the column The lower end is fixedly installed in the installation chamber.

In this way, because the column is made of recombined bamboo material, when the column is directly installed in the soil, it is not only difficult to install, but also the column is prone to corrosion and failure, which reduces the stability and service life of the cantilever beam bridge. When the obtained base is installed, the lower end of the installation base can be set inside the soil, and the upper end can be set on the upper part of the soil to prevent the column from being corroded by soil or water and prolong the service life of the column. Small size, large area at the lower end, and the mass of the lower end is greater than that of the upper end, which can increase the stability of the cantilever beam bridge and facilitate the installation of the column.

As an optimization, the support structure includes longitudinal bamboo beam members and connecting bamboo beam members arranged along the length direction of the main beam, and also includes transverse bamboo beam members arranged along the width direction of the main beam, the longitudinal bamboo beam members, The connecting bamboo girders and the horizontal bamboo girders are all strip-shaped rods with a rectangular cross-section, and there are vertically arranged multi-layered vertical bamboo girders above the cross beams, and each layer of vertical bamboo girders is composed of It consists of a plurality of longitudinal bamboo girders evenly distributed along the width direction of the main girder, and the length of each layer of longitudinal bamboo girders increases sequentially from bottom to top along the length direction of the main girder. The surface is provided with a layer of horizontal bamboo beams arranged along the length direction of the main girder. The longitudinal bamboo beams and the horizontal bamboo beams are alternately overlapped from bottom to top, and A layer of horizontal bamboo beams is arranged on the lower surface of the beams along the length direction of the main beam. The horizontal bamboo beams in each layer are vertically arranged in a row. At the end of each horizontal bamboo beam Bolt holes are vertically opposite to the part and the part that forms a space between the adjacent longitudinal bamboo beams, and each column of horizontal bamboo beams is fixedly connected by vertically arranged bolts through the bolt holes. The upper surface of the connecting bamboo beam member is attached to the lower surface of the main beam, and the lower surfaces of both ends of the connecting bamboo beam member are respectively overlapped with the upper surfaces of the ends of the two horizontally adjacent longitudinal bamboo beam members on the uppermost layer. Next, a layer of supporting bamboo beams with a rectangular cross-section is arranged on the upper surface of the uppermost longitudinal bamboo beam along the length direction of the main beam, and the height of the supporting bamboo beam in the vertical direction is higher than The height in the vertical direction of the uppermost horizontal bamboo girder, the upper surface of the supporting bamboo girder is attached to the lower surface of the main girder, facing the two vertically adjacent ones above the pier In the gap formed by the longitudinal bamboo beam member and the two horizontally adjacent horizontal bamboo beam members arranged between the two vertically adjacent longitudinal bamboo beam members, a support reinforcing pad is arranged, and the support The height of the seat reinforcement pad is consistent with the height of the horizontal bamboo beam member, and the upper and lower surfaces of the support reinforcement pad are respectively attached to the surfaces of the longitudinal bamboo beam members above and below it. The lower parts of the two ends of the main beam are vertically arranged For a wall made of concrete material, the end of the longitudinal bamboo beam member located at the lower part of the two ends of the main beam near the wall is anchored on the wall.

In this way, the main girder is set above the support structure, which can make the cantilever bridge bear greater load and increase the stability of the cantilever bridge. It is a large whole, and the length of the longitudinal main girder gradually increases from bottom to top at the position near the mid-span. The upper part of the longitudinal bamboo girder is equipped with a support reinforcement pad to bear the load together with the transverse bamboo girder. This design It can reduce the self-weight of the support structure, save material consumption and achieve greater strength. It is also convenient for on-site transportation and installation, and can withstand greater bending moments and deflections. A layer of horizontal bamboo is arranged on the upper and lower surfaces of the longitudinal bamboo beams. The beams and the horizontal bamboo beams are tightened from bottom to top with bolts to form a pre-pressure, which better integrates the support structure into a whole to achieve the effect of overall coordinated force, and at the same time increases the bearing capacity of the support structure. load, and a layer of supporting bamboo beams is set above the uppermost longitudinal bamboo beams, which is convenient for fixing bolts above the uppermost horizontal bamboo beams, and also facilitates the installation of the main beam; One end of the longitudinal bamboo girder is anchored in the wall. When the main girder bears load, the main girder can transfer the load to the pier and the wall through the supporting structure, so that the stress can be better transmitted and the deformation of the supporting structure can be avoided. failure, prolonging the service life of the support structure.

As an optimization, the crossbeam is connected to the first layer of longitudinal bamboo beam members through rubber bearings, and the lower surfaces of the two ends of the connecting rod and the upper surfaces of the ends of the longitudinal bamboo beam members located below the connecting rod The connection between the lower surfaces of both ends of the main beam and the upper surface of the wall is connected by rubber bearings.

In this way, connecting any two independent parts through rubber bearings can compensate the installation error of each part during the installation process, minimize the impact of installation errors on the cantilever beam bridge, and increase the stability and use of the cantilever beam bridge. Life, but also facilitate the connection between the various components.

As an optimization, the ends of the longitudinal bamboo beams are installed on the wall through embedded parts, one end of the embedded parts is anchored in the wall, and the other end is connected to the longitudinal bamboo beams. The ends are fixedly connected, and the embedded part includes a square cylindrical member that is arranged horizontally and penetrates at both ends, and also includes an embedded rod. One end of the square cylindrical member is provided with a vertically arranged baffle, and the baffle The other side of the board is provided with a plurality of pre-embedded rods perpendicular to the surface of the baffle and arranged in a rectangular array. The pre-embedded rods are anchored into the wall, and two Two mounting plates parallel to each other and arranged transversely, one end of the mounting plate is fixedly connected to the baffle plate, one end of the longitudinal bamboo beam member is provided with a mounting hole matched with the mounting plate, the longitudinal bamboo beam bar One end of the piece provided with a mounting hole is installed inside the square tubular member, and the square tubular member is fixedly connected to the longitudinal bamboo beam member by means of vertically arranged bolts.

In this way, when constructing the wall, one end of the pre-embedded rod can be directly anchored in the wall, and when on-site construction and assembly, one end of the longitudinal bamboo beam is fixedly connected with the square cylindrical member, and finally the pre-embedded The welding of these two parts of the piece can better reduce the construction difficulty and improve the construction efficiency. At one end of the longitudinal bamboo beam, there is a mounting hole connected with the square cylindrical member, which can make the installation of the longitudinal bamboo beam more firm. Avoiding the corrosion failure of one end of the longitudinal bamboo beam member directly installed in the wall can prolong the service life of the longitudinal bamboo beam member.

As an optimization, the main girder includes a rectangular plate-shaped panel located above and arranged horizontally, and also includes leveling bamboo beams arranged horizontally and longitudinally uniformly below the panel, and the two outermost leveling bamboo beams in the leveling bamboo beams The outer side of the beam is flush with the two side edges of the panel, the lower surface of the leveling bamboo beam is connected with the upper surface of the uppermost horizontal bamboo beam member and the upper surface of the connecting rod, and the leveling bamboo beam The lower surfaces at both ends are connected to the upper surface of the wall through rubber bearings.

In this way, setting leveling bamboo beams above the support structure can facilitate the installation of the panels, ensure the level of the panels, and improve the quality of the project. Moreover, the panels and the leveling beams are made of recombined bamboo materials, which are environmentally friendly and low in cost. After the leveling beam is processed in the bamboo processing factory, it can be directly assembled on site, which is convenient for construction and saves construction period.

As an optimization, the railing includes two rows of vertically arranged vertical bars located on both sides of the main beam, and the lower ends of the vertical bars are fixedly connected to the outside of the outermost leveling bamboo beams by means of horizontally arranged bolts, and also include: Horizontally arranged horizontal bars connecting the upper ends of two adjacent vertical bars along the length direction of the main beam, and the two ends of the horizontal bars are fixedly connected to the upper ends of the vertical bars by means of horizontally arranged bolts.

In this way, the lower ends of the vertical rods are fixedly installed on both sides of the leveling bamboo beams, so that the panel can be placed between the two vertical rods oppositely arranged to ensure that the position of the panels relative to the leveling bamboo beams does not change relatively. On the other hand, the railings adopt It is made of recombined bamboo material, which is environmentally friendly and low in cost. The horizontal bar and vertical bar can be directly installed on site, and the construction is convenient and fast.

The modern bamboo pedestrian cantilever bridge of the present invention has the following advantages: (1) making full use of the physical properties of the components, overcoming the shortcomings of a single stressed component being large in size and difficult in processing or construction, it can not only ensure the span of the pedestrian cantilever bridge, but also facilitate Processing can also reduce the difficulty of construction, reduce the construction period, and can be directly assembled on site. It is a good choice for permanent or temporary pedestrian cantilever bridges; (2) The processing of each component made of recombined bamboo materials can be To achieve modularization, each component can be pre-processed in the bamboo processing factory and transported to the site for direct assembly, which is simple and fast, saves manpower and material resources, and reduces the construction period; (3) The pedestrian cantilever bridge with this structure is safe in structure and elegant in shape Simple and beautiful, the production specifications of each component can be varied, and it is convenient to use standardized components and modules for design and construction; (4) Bamboo is used as the main raw material, which has a wide source of raw materials and is a renewable resource. The advantages of fast, short cycle time and large output can meet the needs of production and processing.

In summary, the present invention has the characteristics of good overall performance, less materials, light weight and convenient construction, and the obtained cantilever bridge has the advantages of green, low carbon, environmental protection and economy.

Description of drawings

Fig. 1 is a structural representation of a modern bamboo pedestrian cantilever bridge adopting the structure of the present invention.

Fig. 2 is a sectional view of section A-A in Fig. 1 .

Fig. 3 is a sectional view of section B-B in Fig. 1 .

Fig. 4 is a schematic structural view of the embedded part of the longitudinal bamboo beam in Fig. 1 .

Fig. 5 is a schematic structural view of the pier beam and the installation steps of the pier in Fig. 1 .

Figure 6 is a schematic structural view of the base in Figure 1 .

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings.

During specific implementation: as shown in Figures 1-6, it includes at least two bridge piers 1, a main beam arranged above the bridge piers 1 and railings arranged on both sides of the main beam, and the main beams and railings are all made of recombined bamboo materials , also includes a support structure made of recombined bamboo material, the support structure is arranged between the pier 1 and the main girder, and the cross-sectional area of the support structure in the horizontal direction gradually increases from bottom to top.

In the present invention, the recombined bamboo material is applied to the pedestrian cantilever beam bridge, which has the characteristics of green, low carbon, and environmental protection. It is especially used to make a support structure, which has good compressive performance, and the support structure adopts a structural form with a small bottom and a large top , using a number of standardized small-section bamboo girders criss-crossed to form a whole with a large section size, which reduces the weight of the bridge body and the amount of materials used, can withstand a large bearing capacity, and can better integrate the main girder. The stress transmitted to the bridge piers increases the stability of the cantilever beam bridge and prolongs the service life, and the components used can be made of recombined bamboo materials in advance according to the drawings in the bamboo processing factory, and then transported to the construction site for construction, making the cantilever beam bridge The construction is simple and fast, and meets the needs of normal use and durability of cantilever beam bridges.

Wherein, each of the piers 1 includes two columns 11 respectively arranged on both sides of the main girder and a crossbeam 12 erected between the two columns. Install the step, the two ends of the crossbeam 12 are fixedly installed on the installation step, and the column and the crossbeam are made of recombined bamboo material.

In this way, the pier is made of recombined bamboo material, which is low-carbon, environmentally friendly and low-cost; the pier is divided into three parts and processed separately and transported to the site for assembly, which makes the construction convenient and fast, and can reduce the construction period and construction difficulty. The upper installation steps enable the cantilever beam bridge to withstand greater loads without failure, improving the strength and bearing capacity of the bridge. Of course, in actual implementation, the bridge pier can adopt an integrated structure, which also belongs to the implementable range of the device.

Wherein, the cross-section of the corner plate 111 is installed at the junction line formed after the end of the beam 12 is attached to the surface of the installation step of the column 11. The two sides of the corner plate 111 are respectively connected to the ends of the beam 12 The upper surface and the installation step surface of the column 11 are bonded and connected by bolts, and a rib plate is arranged between the two vertical surfaces of the corner plate 111 .

In this way, the two fitting surfaces can be better connected, the reliability of the connection between the two fitting surfaces can be ensured, and the relative position change between the beam and the column can be better avoided when the load is applied, and the stability of the cantilever beam bridge can be improved. sex. Of course, in practical implementation, the beam can be directly welded to the installation step of the column, which also belongs to the applicable scope of the present invention.

Wherein, below the column 11, an installation base 9 made of reinforced concrete material is provided, and the installation base 9 is a trapezoid whose bottom area is larger than the top area, and an upward installation chamber is formed on the top of the trapezoid 9, The lower end of the column 11 is fixedly installed in the installation chamber.

In this way, because the column is made of recombined bamboo material, when the column is directly installed in the soil, it is not only difficult to install but also the column is easy to corrode and fail, reducing the stability and service life of the cantilever beam bridge. When the installed base is prepared, the lower end of the installed base can be arranged inside the soil, and the upper end can be arranged on the upper part of the soil, so as to avoid the corrosion of the column by soil or water and prolong the service life of the column. At the same time, the installed base adopts a trapezoidal structure, and the upper end The area is small, and the area of the lower end is large, so that the mass of the lower end is greater than that of the upper end, which can increase the stability of the cantilever beam bridge and facilitate the installation of columns. Of course, during specific implementation, the base can be set in any structural form, which all belong to the scope of the present invention.

Wherein, the support structure includes a longitudinal bamboo beam member 3 and a connecting bamboo beam member 5 arranged along the length direction of the main beam, and also includes a transverse bamboo beam member 4 arranged along the width direction of the main beam. Part 3, the connecting bamboo beam rod part 5 and the transverse bamboo beam rod part 4 are strip rods with a rectangular cross section, and the top of the cross beam 12 is vertically provided with multi-layer longitudinal bamboo beams arranged uniformly along the width direction of the main beam Rods 3, the length of each layer of longitudinal bamboo beams 3 along the length direction of the main beam increases sequentially from bottom to top, and the upper surface of each layer of longitudinal bamboo beams 3 is provided with a layer of bamboo beams distributed along the length direction of the main beam. The horizontal bamboo beams 4, the longitudinal bamboo beams 3 and the horizontal bamboo beams 4 are overlapped alternately from bottom to top, and a layer of edge is arranged on the lower surface of the bottom longitudinal bamboo beams 3 The horizontal bamboo beams 4 arranged in the lengthwise direction of the main girder, the horizontal bamboo beams 4 in each layer are vertically arranged in a row, at the end of each horizontal bamboo beam 4 and at the adjacent The parts that form spaces between the longitudinal bamboo beams 3 are all vertically oppositely provided with bolt holes, and the vertically arranged bolts penetrate through the bolt holes to fix and connect each row of horizontal bamboo beams 4, and the connecting bamboo beams The upper surface of the rod 5 is attached to the lower surface of the main beam, and the lower surfaces of the two ends of the connecting bamboo beam rod 5 overlap with the upper surfaces of the ends of the uppermost horizontally adjacent two vertical bamboo beam rods 3 respectively. , the upper surface of the longitudinal bamboo beam member 3 on the uppermost floor is also distributed with a layer of supporting bamboo beam members whose cross-section is rectangular along the length direction of the main beam, and the height of the supporting bamboo beam members in the vertical direction of this layer is higher than The height of the uppermost horizontal bamboo beam member 4 in the vertical direction, the upper surface of the supporting bamboo beam member is attached to the lower surface of the main beam, facing the two vertically adjacent columns above the pier The space formed by the longitudinal bamboo beam member 3 and the two horizontally adjacent horizontal bamboo beam members 4 between the two vertically adjacent longitudinal bamboo beam members 3 is provided with a support reinforcement pad 8. The height of the support reinforcement block 8 is consistent with the height of the transverse bamboo beam member 4 and the upper and lower surfaces of the support reinforcement block 8 are respectively attached to the surfaces of the vertical bamboo beam member 3 located above and below it, and the main A wall made of concrete material is vertically arranged at the lower part of the two ends of the beam, and the longitudinal bamboo beam member 3 located at the lower part of the two ends of the main beam is anchored on the wall near the end of the wall.

In this way, the main girder is set above the support structure, which can make the cantilever bridge bear greater load and increase the stability of the cantilever bridge. It is a large whole, and the length of the longitudinal main girder gradually increases from bottom to top at the position near the mid-span. The upper part of the longitudinal bamboo girder is equipped with a support reinforcement pad to bear the load together with the transverse bamboo girder. This design It can reduce the self-weight of the support structure, save material consumption and achieve greater strength. It is also convenient for on-site transportation and installation, and can withstand greater bending moments and deflections. A layer of horizontal bamboo is arranged on the upper and lower surfaces of the longitudinal bamboo beams. The beams and the horizontal bamboo beams are tightened from bottom to top with bolts to form a pre-pressure, which better integrates the support structure into a whole to achieve the effect of overall coordinated force, and at the same time increases the bearing capacity of the support structure. load, and a layer of supporting bamboo beams is set above the uppermost longitudinal bamboo beams, which is convenient for fixing bolts above the uppermost horizontal bamboo beams, and also facilitates the installation of the main beam; One end of the longitudinal bamboo girder is anchored in the wall. When the main girder bears load, the main girder can transfer the load to the pier and the wall through the supporting structure, so that the stress can be better transmitted and the deformation of the supporting structure can be avoided. failure, prolonging the service life of the support structure.

Wherein, the crossbeam 12 is connected with the first layer of longitudinal bamboo beam member 3 through the rubber bearing 2, and the lower surface of both ends of the connecting rod 5 is connected with the end of the longitudinal bamboo beam member 3 below the connecting rod 5. The upper surfaces of the parts are connected by rubber bearings 2, and the lower surfaces of both ends of the main beam and the upper surface of the wall are connected by rubber bearings 2.

In this way, connecting any two independent parts through rubber bearings can compensate the installation error of each part during the installation process, minimize the impact of installation errors on the cantilever beam bridge, and increase the stability and use of the cantilever beam bridge. It also facilitates the connection between various components. Of course, during specific implementation, the rubber support can be set as a support reinforcement block, which also belongs to the implementable scope of the device.

Wherein, the end of described longitudinal bamboo beam bar member 3 is installed on the described body of wall through embedded part 10, and one end of described embedded part 10 is anchored in described wall, and the other end is connected with described longitudinal bamboo beam. The ends of the rods 3 are fixedly connected, and the embedded part 10 includes a square cylindrical member 101 that is arranged horizontally and penetrated at both ends, and also includes a pre-embedded rod 103, and one end of the square cylindrical member 101 is provided with a vertically arranged The baffle 102, the other side of the baffle 102 is provided with a plurality of embedded rods 103 perpendicular to the surface of the baffle 102 and arranged in a rectangular array, the embedded rods 103 are anchored into the wall, The inside of the square cylindrical member 101 is also distributed with two parallel and transverse installation plates, one end of the installation plate is fixedly connected to the baffle plate, and one end of the longitudinal bamboo beam member 3 is provided with An installation hole matched with the installation plate, one end of the longitudinal bamboo beam member 3 provided with the installation hole is installed inside the square cylindrical member 101, and the square cylindrical member 101 is connected to the longitudinal bamboo beam by a vertically arranged bolt. The rod 3 is fixedly connected.

In this way, when constructing the wall, one end of the pre-embedded rod can be directly anchored in the wall, and when on-site construction and assembly, one end of the longitudinal bamboo beam is fixedly connected with the square cylindrical member, and finally the pre-embedded The welding of these two parts of the piece can better reduce the construction difficulty and improve the construction efficiency. At one end of the longitudinal bamboo beam, there is a mounting hole connected with the square cylindrical member, which can make the installation of the longitudinal bamboo beam more firm. Avoiding the corrosion failure of one end of the longitudinal bamboo beam member directly installed in the wall can prolong the service life of the longitudinal bamboo beam member. Of course, during specific implementation, the embedded part can adopt any structural form of the embedded part, all of which belong to the implementable range of the device.

Wherein, the main girder includes a rectangular plate-shaped panel 62 located above and arranged horizontally, and also includes leveling bamboo beams 61 arranged horizontally and longitudinally uniformly below the panel 62, and the two outermost two sides of the leveling bamboo beams 61 are The outer side of each leveling bamboo beam 61 is flush with the both side edges of the panel 62, the lower surface of the leveling bamboo beam 61 and the upper surface of the uppermost horizontal bamboo beam member 4 and the upper surface of the connecting rod 5 Connected, the lower surfaces of the two ends of the leveling bamboo beam 61 are connected with the upper surface of the wall through rubber bearings 2 .

In this way, setting leveling bamboo beams above the support structure can facilitate the installation of the panels, ensure the level of the panels, and improve the quality of the project. Moreover, the panels and the leveling beams are made of recombined bamboo materials, which are environmentally friendly and low in cost. After the leveling beam is processed in the bamboo processing factory, it can be directly assembled on site, which is convenient for construction and saves construction period. Of course, in practical implementation, the main girder can be set as a multi-layer structure, and a plurality of leveling bamboo beams can be added, or the leveling bamboo beams can be set as a structural form of a panel, all of which belong to the scope of the present invention.

Wherein, the railing includes two rows of vertically arranged vertical bars 71 positioned on both sides of the main beam, and the lower ends of the vertical bars 71 are fixedly connected to the outside of the outermost leveling bamboo beam 61 by means of horizontally arranged bolts. It also includes a horizontal cross bar 72 connecting the upper ends of two adjacent vertical bars 71 along the length direction of the main girder.

In this way, the lower ends of the vertical rods are fixedly installed on both sides of the leveling bamboo beams, so that the panel can be placed between the two vertical rods oppositely arranged to ensure that the position of the panels relative to the leveling bamboo beams does not change relatively. On the other hand, the railings adopt It is made of recombined bamboo material, which is environmentally friendly and low in cost. The horizontal bar and vertical bar can be directly installed on site, and the construction is convenient and fast. Of course, during specific implementation, an installation cylinder can be arranged above the panel, and the lower end of the vertical rod is fixed in the installation cylinder, which also belongs to the applicable scope of the present invention.

The modern bamboo pedestrian cantilever bridge of the present invention has the following advantages: (1) making full use of the physical properties of the components, overcoming the shortcomings of a single stressed component being large in size and difficult in processing or construction, it can not only ensure the span of the pedestrian cantilever bridge, but also facilitate Processing can also reduce the difficulty of construction, reduce the construction period, and can be directly assembled on site. It is a good choice for permanent or temporary pedestrian cantilever bridges; (2) The processing of each component made of recombined bamboo materials can be To achieve modularization, each component can be pre-processed in the bamboo processing factory and transported to the site for direct assembly, which is simple and fast, saves manpower and material resources, and reduces the construction period; (3) The pedestrian cantilever bridge with this structure is safe in structure and elegant in shape Simple and beautiful, the production specifications of each component can be varied, and it is convenient to use standardized components and modules for design and construction; (4) Bamboo is used as the main raw material, which has a wide source of raw materials and is a renewable resource. The advantages of fast, short cycle time and large output can meet the needs of production and processing.

The above-mentioned modern bamboo pedestrian cantilever beam bridge can be obtained by the following construction steps: a, the main girder, railing, column 11, crossbeam 12, horizontal bamboo beam member 4, and longitudinal bamboo beam member 3 are pre-assembled in the bamboo processing plant according to the drawings 1. The connecting bamboo beam member 5 and the supporting bamboo beam member are prepared with recombined bamboo material and pre-punched at the bolt connection position for pre-assembly, and then the pre-assembled structure is disassembled and each component is transported to the site; b , Determine the position of the pier 1 at the installation site in advance, and cast in-situ to form the installation base 9, lift and position the processed column 11 into the installation base 9, fill the reserved installation gap with plain concrete to fix the column 11, and pre-install Determine the installation position of the main beam on site, and form a wall made of concrete material at the lower parts of the two ends of the installation position of the main beam. When pouring the wall, pour one end of the embedded part 10 into the wall; c 1. The hoisting beam 12 is positioned on the column 11 and the gusset 111 is installed to fix the beam with the column 11; d, set up a full-wall support around the main body of the bridge, and start the installation of the bridge body by the full-wall support; 12, the supporting structure is installed above, and the end of the longitudinal bamboo beam member 3 located below the main beam close to the wall is anchored in the wall through the embedded part 10, and then according to the pre-drilled position of the processing plant, corresponding to the horizontal bamboo beams in turn. The bolts that are vertically set through the holes of the beam member 3 are anchored after reaching the expected position; f, after the support structure is installed, the installation and connection of the main beam and the railing are completed; g, the restructured bamboo material is used The outer surface of the component is painted with a layer of waterproof paint, and then the mandrel is disassembled to complete the installation.

In this way, the construction has the characteristics of simplicity, quickness, reliability and safety, and at the same time, the obtained pedestrian cantilever bridge has the advantages of good stability, good bearing capacity, and long service life.

Claims (9)

1. a modern bamboo pedestrian cantilever beam bridge, comprising at least two piers, the main girder above the pier and the railings arranged on both sides of the main girder, it is characterized in that, the main girder and the railing are all made of recombined bamboo materials It also includes a support structure made of recombined bamboo material, the support structure is arranged between the pier and the main girder, and the cross-sectional area of the support structure in the horizontal direction gradually increases from bottom to top. 2. modern bamboo pedestrian cantilever bridge as claimed in claim 1, is characterized in that, described each bridge pier comprises two columns that are respectively arranged on main girder both sides and the crossbeam erected between two columns, said The upper parts of the opposite sides of the two columns each have a concave installation step, and the two ends of the beam are fixedly installed on the installation step, and the column and the beam are made of recombined bamboo material. 3. The modern bamboo pedestrian cantilever beam bridge as claimed in claim 2, characterized in that, the cross-section is an L-shaped corner plate installed at the junction line formed after the end of the beam is attached to the surface of the column installation step , the two side surfaces of the corner plate are attached to the surface of the end of the beam and the surface of the column installation step respectively and are fixedly connected by bolts, and a rib plate is arranged between the two vertical surfaces of the corner plate. 4. modern bamboo pedestrian cantilever beam bridge as claimed in claim 2, is characterized in that, described column below is provided with the mounting base that is made by reinforced concrete material, and described mounting base is the trapezoidal body that bottom area is greater than top area and An installation chamber with an upward opening is formed on the upper part of the trapezoid, and the lower end of the column is fixedly installed in the installation chamber. 5. The modern bamboo pedestrian cantilever girder bridge as claimed in claim 2, characterized in that, said support structure comprises longitudinal bamboo girder members and connecting bamboo girder members arranged along the length direction of the main girder, and also includes The horizontal bamboo beams arranged in the direction, the longitudinal bamboo beams, the connecting bamboo beams and the horizontal bamboo beams are all strip-shaped bars with a rectangular cross section, and horizontally arranged horizontal bamboo beams are arranged vertically above the cross beam Multi-layer longitudinal bamboo beam members, each layer of longitudinal bamboo beam members are composed of multiple longitudinal bamboo beam members uniformly arranged along the width direction of the main beam, and the length of each layer of longitudinal bamboo beam members is along the length direction of the main beam Increasing in turn from bottom to top, the upper surface of each layer of longitudinal bamboo beams is provided with a layer of horizontal bamboo beams distributed along the length direction of the main beam, and the longitudinal bamboo beams and the horizontal bamboo beams The pieces are overlapped alternately from bottom to top, and a layer of horizontal bamboo beams distributed along the length direction of the main beam is arranged on the lower surface of the bottom longitudinal bamboo beams. Arranged vertically upwards, bolt holes are vertically opposite to each end of each horizontal bamboo girder and the space between the adjacent vertical bamboo girders. Through the bolt holes, each row of transverse bamboo beams is fixedly connected, the upper surface of the connecting bamboo beams is attached to the lower surface of the main beam, and the lower surfaces of the two ends of the connecting bamboo beams are respectively connected to the uppermost The upper surfaces of the ends of the horizontally adjacent two longitudinal bamboo beams are overlapped, and the upper surface of the uppermost longitudinal bamboo beam is distributed along the length direction of the main beam with a layer of supporting bamboo beams with a rectangular cross section. , the vertical height of this layer of supporting bamboo beams is higher than the height of the uppermost horizontal bamboo beams in the vertical direction, the upper surface of the supporting bamboo beams and the lower surface of the main beam Fitting, opposite two vertically adjacent longitudinal bamboo girder members placed above the pier and two horizontally adjacent horizontal bamboo girder members disposed between the two vertically adjacent longitudinal bamboo girder members The gap formed by the rods is provided with a support reinforcement pad, the height of the support reinforcement pad is consistent with the height of the horizontal bamboo beam rod, and the upper and lower surfaces of the support reinforcement pad are respectively connected to the vertical bamboo beam rods above and below it. The surface of the bamboo girder is attached to the surface of the main beam. The lower part of the two ends of the main beam is vertically provided with a wall made of concrete material. superior. 6. modern bamboo pedestrian cantilever beam bridge as claimed in claim 5, is characterized in that, is connected by rubber bearing between described crossbeam and first floor longitudinal bamboo girder member, and the lower surface of two ends of described connecting rod and The upper surfaces of the ends of the longitudinal bamboo beams located below the connecting rods are connected by rubber bearings, and the lower surfaces of both ends of the main beam and the upper surface of the wall are connected by rubber bearings. 7. The modern bamboo pedestrian cantilever bridge as claimed in claim 5, characterized in that, the ends of the longitudinal bamboo girders are installed on the wall through embedded parts, and one end of the embedded parts is anchored In the wall, the other end is fixedly connected to the end of the longitudinal bamboo girder, and the embedded part includes a square cylindrical member arranged horizontally and penetrated at both ends, and also includes a pre-embedded rod. One end of the square cylindrical member is provided with a vertically arranged baffle, and the other side of the baffle is provided with a plurality of embedded rods perpendicular to the surface of the baffle and arranged in a rectangular array, and the embedded rods are anchored Into the wall, there are two installation plates parallel to each other and arranged transversely in the interior of the square tubular member, one end of the installation plate is fixedly connected to the baffle plate, and the longitudinal bamboo beams One end is provided with a mounting hole matched with the mounting plate, and one end of the longitudinal bamboo beam member provided with the mounting hole is installed inside the square cylindrical member, and the square cylindrical member and the longitudinal bamboo beam are connected by vertically arranged bolts. The rods are fixedly connected. 8. The modern bamboo pedestrian cantilever girder bridge as claimed in claim 5, wherein the main girder comprises a rectangular plate-shaped panel positioned above and arranged horizontally, and also includes a leveling panel arranged horizontally and vertically evenly below the panel. Bamboo beams, the outer sides of the two outermost leveling bamboo beams in the leveling bamboo beams are flush with the two side edges of the panel, and the lower surface of the leveling bamboo beams is aligned with the uppermost horizontal bamboo beams The upper surface of the component and the upper surface of the connecting rod are connected, and the lower surfaces of both ends of the leveling bamboo beam are connected with the upper surface of the wall through rubber bearings. 9. The modern bamboo pedestrian cantilever beam bridge as claimed in claim 8, wherein the railing comprises two columns of vertically arranged vertical bars positioned at the edges of both sides of the main girder, and the lower ends of the vertical bars rely on horizontally arranged vertical bars. Bolts are fixedly connected to the outside of the outermost leveling bamboo girder, and also include horizontally arranged horizontal bars connecting the upper ends of two adjacent vertical bars along the length direction of the main beam. The upper end of the vertical bar is fixedly connected.