Preliminary study on application of metal members with corrugated webs in the supports of soft rock

摘要

A new type of metal support named H-Shaped members with corrugated webs is put forward for the soft rock tunnels or roadways supports. The H-shaped member with corrugated webs is welded by corrugated webs and plain flange steel plates. The loading behaviors of the members are greatly improved by the corrugation in the webs compared with that of the members with plain webs. The new type of support has fair good mechanical performances with its own merits, including easy fabrication, fast construction etc. especially it can adapt to the large deformation of soft rocks. The elastic buckling behaviors are analyzed for the new horse-shoe shape supports with corrugated webs. The influences of the sectional parameters on the elastic buckling loads are discussed herein. Results show that the wave amplitude and wave height of corrugated webs have less influence on the buckling loads than those of the height of the webs and the width of the flanges etc. Some problems worth studying in the future for the new type of tunnel supports are also raised.