阅读说明：本技术 一种快速架设的充气式桥梁 (Inflatable bridge that erects fast ) 是由 张立乾 闫晶 陈红 李兵 吴星 郭宏云 孟良 孙崇华 贾佳 王新波 田海娇 冯 于 2020-11-10 设计创作，主要内容包括：本发明公开了一种快速架设的充气式桥梁,包括充气环组件及桥面承载板；充气环组件设置在山谷内作为竖向支撑；桥面承载板沿山谷跨度方向安装在充气环组件上,充气环组件自身以及充气环组件和两侧山谷之间形成填充嵌锁关系。本发明能够快速拼装、快速架设。(The invention discloses a rapidly-erected inflatable bridge, which comprises an inflatable ring assembly and a bridge deck bearing plate, wherein the inflatable ring assembly is arranged on the bridge deck bearing plate; the inflatable ring assembly is arranged in the valley to be used as a vertical support; the bridge floor loading board is installed on aerifing the ring subassembly along valley span direction, aerifys ring subassembly self and aerifys and form between ring subassembly and the both sides valley and fill the interlocking relation. The invention can be assembled and erected quickly.)

1. A rapidly-erected inflatable bridge is characterized by comprising an inflatable ring assembly and a bridge deck bearing plate;

the inflatable ring assembly is arranged in the valley to be used as a vertical support; the bridge floor bearing plate is installed on the inflatable ring assembly along the valley span direction, and the inflatable ring assembly, the inflatable ring assembly and valleys on two sides form a filling and interlocking relationship.

2. The rapidly erected inflatable bridge according to claim 1, wherein said inflatable ring assembly comprises more than 1 inflatable ring unit, said inflatable ring unit is assembled by more than 2 inflatable rings in parallel, and the axes of all the inflatable rings are coincident;

when the inflation ring units are in a single layer in the vertical direction, the inflation ring units are in line contact arrangement in the valley span direction to form an inflation module;

when the inflation ring units are in multiple layers in the vertical direction, the inflation ring units on the upper layer are simultaneously in line contact with the two inflation ring units on the lower layer to form the inflation module.

3. The rapidly erected inflatable bridge according to claim 2, wherein the filler rod is filled between the inflation rings, and at the same time, two adjacent inflation rings are wound with the filler rod therein by winding tape.

4. The rapidly erected inflatable bridge according to claim 2, wherein said inflatable modules are spaced apart in a direction perpendicular to the span of the bridge.

5. The rapidly erected inflatable bridge according to claim 4, wherein the inflatable ring units are fixed to the ground by fixing means.

6. The rapidly erected inflatable bridge according to claim 4, wherein the inflation modules perpendicular to the bridge span direction are fixedly connected by a connecting member.

7. The rapidly erected inflatable bridge according to claim 2, wherein the internal pressure of each of the inflation rings is 0.2Mpa to 0.7 Ma.

8. The rapidly erected inflatable bridge according to claim 2, wherein the inflatable ring is of a three-layer structure comprising a closed inner container, a stressed layer and an outer sleeve; the closed inner container is made of a high-toughness rubber material; the stress layer adopts carbon fiber, polyester fiber or high-strength steel wire compounded outside the closed inner container; the outer cover is made of canvas.

9. The rapidly erected inflatable bridge according to claim 8, wherein the thickness of the inflatable ring is between 5mm and 10 mm.

Technical Field

The invention relates to the technical field of bridge structures, in particular to a rapidly-erected inflatable bridge.

Background

The inflatable support ring is an inflatable structure and has certain bearing capacity, and the bearing principle of the inflatable structure is as follows: the membrane sac obtains larger internal pressure after being inflated, the internal pressure causes the membrane surface to generate tension, and the tension of the membrane and the internal pressure can resist external load, thereby realizing the function of bearing force. It has the advantages of light weight and strong bearing capacity. At present, inflatable structures are widely applied to the fields of aerospace, near space aircrafts and large buildings. The report is not found in the field of bridges, particularly in the field of meeting the requirement of emergency rapid bridge erection.

Disclosure of Invention

In view of this, the invention provides a rapidly erected inflatable bridge, which can be rapidly assembled and erected.

The technical scheme adopted by the invention is as follows:

a rapidly-erected inflatable bridge comprises an inflatable ring assembly and a bridge deck bearing plate;

the inflatable ring assembly is arranged in the valley to be used as a vertical support; the bridge floor bearing plate is installed on the inflatable ring assembly along the valley span direction, and the inflatable ring assembly, the inflatable ring assembly and valleys on two sides form a filling and interlocking relationship.

Furthermore, the inflation ring assembly comprises more than 1 inflation ring unit, the inflation ring unit is formed by splicing more than 2 inflation rings in parallel, and the axes of all the inflation rings are overlapped;

when the inflation ring units are in a single layer in the vertical direction, the inflation ring units are in line contact arrangement in the valley span direction to form an inflation module;

when the inflation ring units are in multiple layers in the vertical direction, the inflation ring units on the upper layer are simultaneously in line contact with the two inflation ring units on the lower layer to form the inflation module.

Further, the filling rod is filled between the air inflation rings, and simultaneously, the adjacent two air inflation rings wind the filling rod therein by the winding belt.

Furthermore, the inflation modules are arranged at intervals in the direction perpendicular to the span length of the bridge.

Further, the air ring unit is fixed to the ground by a fixing device.

Furthermore, the inflation modules perpendicular to the bridge span direction are fixedly connected through the connecting members.

Furthermore, the internal pressure of each inflation ring is 0.2 MPa-0.7 Ma.

Furthermore, the inflation ring is of a three-layer structure and comprises a closed inner container, a stress layer and an outer sleeve; the closed inner container is made of a high-toughness rubber material; the stress layer adopts carbon fiber, polyester fiber or high-strength steel wire compounded outside the closed inner container; the outer cover is made of canvas.

Further, the thickness of the inflation ring is between 5mm and 10 mm.

Has the advantages that:

1. the inflatable ring assembly is used as a vertical supporting basic stress member, can greatly reduce the single span of the bridge deck bearing plate, provides possibility for realizing quick assembly of the bridge deck bearing plate, has light weight, can be generally controlled within 150Kg, and provides convenience for realizing quick assembly. Secondly, aerify the ring subassembly self and aerify and form between ring subassembly and the both sides valley and fill the interlocking relation, can form the lateral stability structure, the common atress avoids the side direction unstability.

2. The inflatable ring assemblies are flexible in combination, can be combined in the span direction and can also be combined in the direction perpendicular to the span direction of the bridge, so that the inflatable ring assemblies can be well suitable for different spanning terrains; secondly, the inflatable ring units are combined in the valley span direction, so that the distance of a supporting point of the bridge deck along the span direction can be further reduced, the thickness of a bearing plate of the bridge deck is reduced, and the purposes of quick assembly and quick erection are achieved.

3. The inflatable ring is of a three-layer structure, the sealed inner container mainly provides a sealed airtight environment, the stress layer is made of a material with high tensile strength, the outer sleeve mainly provides necessary frictional resistance and abrasion resistance on the surface, and the requirements of stress, structural vertical bearing strength and rigidity can be met.

Drawings

FIG. 1 is a plan view of a support spanning a single inflatable ring unit;

FIG. 2 is a three-dimensional schematic view of a span-wise single inflatable ring cell support;

FIG. 3 is a plan view of a single layer support of a plurality of inflatable ring units;

FIG. 4 is a three-dimensional schematic view of a single layer support of a plurality of inflatable ring units;

FIG. 5 is a plan view of a double support for a plurality of inflatable ring units;

FIG. 6 is a three-dimensional schematic view of a two-layer support for a plurality of gas-filled ring units;

FIG. 7 is a schematic structural view of an air ring unit formed by three air rings assembled in parallel;

wherein, 1-the gas-filled ring, 2-the bridge deck bearing plate.

Detailed Description

The invention is described in detail below by way of example with reference to the accompanying drawings.

The invention provides a rapidly-erected inflatable bridge, which comprises an inflatable ring assembly and a bridge deck bearing plate 2.

Aerify the ring subassembly setting and install on aerifing the ring subassembly as vertical braces in the valley, bridge floor loading board 2 along the valley span direction, aerify ring subassembly self and aerify and form between ring subassembly and the both sides valley and fill the interlocking relation.

In a preferred embodiment, the projected circle of the gas filled ring assembly is level with the direction of the valley span.

The inflation ring component comprises more than 1 inflation ring unit, the inflation ring unit is formed by assembling more than 2 inflation rings 1 in parallel, and the axes of all the inflation rings 1 are overlapped. As shown in fig. 7, in the present embodiment, the air ring unit is formed by assembling three air rings 1 in parallel.

The inflating ring 1 is of a three-layer structure and is respectively a closed inner container, a stress layer and an outer sleeve; the closed inner container is made of a high-toughness rubber material; the stress layer adopts carbon fiber, polyester fiber or high-strength steel wire compounded outside the closed inner container; the outer cover is made of canvas. The thickness of the three-layer overlapped inflation ring 1 is between 5mm and 10 mm. The internal pressure of each inflation ring 1 is 0.2 Mpa-0.7 Ma.

In the first embodiment, a single inflatable ring unit is used to form the support independently, and the projection circle of the inflatable ring unit is in the same horizontal plane with the valley span direction, as shown in fig. 1 and 2, the single span can be reduced to one half.

In the second embodiment, four inflatable ring unit single-layer supports are adopted, and the single span can be reduced to one third as shown in fig. 3 and 4. In the direction of the valley span, the two inflation ring unit lines are arranged in a contact manner to form the inflation modules, the number of the inflation modules is selected according to the depth of the valley, and the direction of the valley depth is perpendicular to the direction of the bridge span. In this example, two inflation modules are used. The two inflation modules are arranged at intervals in the direction perpendicular to the span length of the bridge and can also be in direct contact with each other. The filler rod is filled between the inflation rings 1, simultaneously, two adjacent inflation rings 1 are twined the filler rod through the winding area and are formed the filling interlocking relation in forming, inflate and set up nest groove between ring 1 and the both sides valley.

The inflation ring unit can also be fixed with the ground through a fixing device; or the inflation modules which are vertical to the span direction of the bridge are fixedly connected through the connecting members to form a filling interlocking relation.

In the third embodiment, ten inflation ring units are used for double-layer support, as shown in fig. 5 and 6, the upper inflation ring unit is in line contact with the two lower inflation ring units simultaneously to form the inflation module, and the number of the inflation modules is selected according to the depth of the valley. In this example, two inflation modules are used. The two inflation modules are arranged at intervals in the direction perpendicular to the span length of the bridge and can also be in direct contact with each other. The filler rod is filled between the inflation rings 1, simultaneously, two adjacent inflation rings 1 are twined the filler rod through the winding area and are formed the filling interlocking relation in forming, inflate and set up nest groove between ring 1 and the both sides valley.

The inflation ring unit can also be fixed with the ground through a fixing device; or the inflation modules which are vertical to the span direction of the bridge are fixedly connected through the connecting members to form a filling interlocking relation.

The bridge deck bearing plate, the mountain bodies at the bottom of the valley and on the two sides of the valley and the inflatable ring are all analyzed by the three-dimensional shell units. A model is established based on ABAQUS analysis software, and physical and mechanical parameters of the model are shown in Table 1.

TABLE 1 physical and mechanical index table

Tab.1 Physical mechanics indicator

Aiming at the bearing capacity analysis of the first embodiment, the stress peak value of Mises after the pressurization of the inflation ring is 70.6 MPa; the stress peak value of Mises after the bridge deck is loaded is 72.1Mpa, the change is only 1.5Mpa, and the stress of the inflatable membrane is not greatly improved after the bridge deck applies the uniform load of total weight of 102.3 tons, which shows that the inflatable membrane has obvious advantage in the aspect of stress balance. The membrane body stress is within the allowable stress range of the membrane body material.

The vertical displacement after the pressurization of the inflatable ring is 43.9mm at the mid-span peak value of the bridge deck and is in an upward arch shape; the peak value of the vertical displacement of the bridge deck after being loaded in the bridge deck span is-47.3 mm, the sum of the peak value and the vertical displacement of the bridge deck span is the vertical displacement of the bridge span under the action of the bridge deck load, namely 91.1mm, and is 1/292 with the span of 26600mm, so that the span vertical displacement is within an allowable range after the bridge deck applies uniformly distributed load with the total weight of 102.3 tons, and the requirement of the inflatable ring structure on the rigidity can be met.

Aiming at the bearing capacity analysis of the second embodiment, the stress peak value of Mises after the pressurization of the inflation ring is 41.3 Mpa; after the bridge deck is loaded, the stress peak value of Mises is 60.7MPa, the stress is increased by 19.4MPa, and the membrane body stress is within the allowable stress range of the membrane body material.

The vertical displacement after the pressurization of the inflatable ring is 8.1mm at the mid-span peak value of the bridge deck and is in an upward arch shape; the peak value of the vertical displacement of the bridge deck after being loaded in the bridge deck span is-20.6 mm, the sum of the peak value and the horizontal displacement is the vertical displacement of the bridge span under the action of the bridge deck load, namely 28.7mm, and is 1/655 with the span of 18800mm, it can be seen that after the bridge deck applies the uniform load with the total weight of 72.3 tons, the vertical displacement in the span is within an allowable range, and the requirement of the inflatable ring structure on the rigidity can be met.

Aiming at the bearing capacity analysis of the third embodiment, the stress peak value of Mises after the pressurization of the inflation ring is 52.3 Mpa; after the bridge deck is loaded, the stress peak value of Mises is 58.4MPa, the stress is increased by 6.1MPa, and the membrane body stress is within the allowable stress range of the membrane body material.

The vertical displacement after the pressurization of the inflatable ring is 10.1mm at the mid-span peak value of the bridge deck and is in an upward arch shape; the peak value of the vertical displacement of the bridge deck after being loaded in the bridge deck span is-33.6 mm, the sum of the peak value and the horizontal displacement is the vertical displacement of the bridge span under the action of the bridge deck load, namely 43.7mm, which is 1/574 with the span of 25100mm, and the vertical displacement in the span is within an allowable range after the bridge deck applies uniform load with the total weight of 96.5 tons, which shows that the inflatable ring structure can meet the requirement on the rigidity.

Based on the analysis, the inflatable ring can meet the bearing requirements of the bridge in both strength and rigidity, and has larger safety reserve. The membrane body stress is controlled within dozens of megapascals, the mid-span vertical deflection is controlled within 1/290 of the span, and the whole is scientifically feasible.

In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.