Expansion type cable-rod-film combined emergency bridge

Abstract

The invention relates to a unfolding type cable-rod-film combined emergency bridge, which consists of a plurality of bridge units; each bridge unit consists of a cable-rod-film composite beam, a bridge faceplate and supports; the cable-rod-film composite beam is mounted in the groove of the supports; and the bridge faceplate is mounted on the cable-rod-film composite beam; the cable-rod-film composite beam consists of a top boom, a bottom boom, a low pressure inflated air bag and a stay cable; the top and the bottom boom are disposed on the upper and lower side of the beam; the low pressure inflated air bag is disposed in the middle of the beam; the stay cables are disposed on both sides of the beam; the bag is disposed on the bottom boom; the top boom is disposed on the bag; cross section of the top and the bottom boom and the low pressure inflated air bag is superposed with the vertical symmetrical axis; the cables are winded individually along both sides of the rod and passed through the node ring disposed on the rod side, and fixed by tightening the cables on both sides to connect the cable, the rod and the low pressure inflated air bag into one integral body. The novel emergency bridge achieves the advantages of extremely light weight, convenience for storing and carrying and rapid installation, and has high practical value and broad application prospect.

Description

(1) Technical field: [0001] The invention relates to an emergency bridge, in particular to an unfolded cable-rod-membrane composite emergency bridge, which belongs to the technical field of civil engineering structures and materials in civil engineering. (2) Background technology [0002] After a sudden disaster struck, roads and information between the disaster area and the outside world were interrupted. In the process of disaster relief, often due to the lack of professional emergency relief equipment, the life channel cannot be opened for a long time, hindering the rapid entry of rescuers and materials into the disaster area. For example, in the Wenchuan earthquake, due to poor road traffic, it took up to 168 hours from the occurrence of the earthquake to the arrival of rescuers in the disaster area, which missed the golden time for emergency rescue and disaster relief. Therefore, the research and development of emergency bridges is an important issue in emergency rescu...

AI Technical Summary

Problems solved by technology

The inflatable membrane structure has the following disadvantages: ① strong air pressure supply is required during the use of the structure; ② if holes or cracks appear locally, the high air pressure makes the inflatable membrane easy to burst suddenly and be destroyed quickly, affecting the safety of the structure performance; ③The structural bearing capacity is limited by air pressure, and is very sensitive to concentrated load; ④Extremely demanding on the quality of the membrane material and the joints of the components

These shortcomings limit the play of the advantages of the membrane structure and its application in emergency bridges

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