Experimentation And Numerical Analysis Of Large Diameter Glass Reinforced Plastic Mortar Pipe-Jacking

Glass reinforced plastic mortar pipe is a kind of flexible pipe which is made by nonmetal complex material. Applying it in pipe-jacking has a lot of advantage, such as light weight, hard eroded, small friction, longevity and so on. At present, in the developed area of China, the using of glass reinforced plastic mortar pipe is growing. This paper combined with the first project of large diameter glass reinforced plastic mortar pipe jacking in Shanghai, study the mechanical behavior of glass reinforced plastic mortar pipe jacking through experimentation and numerical analysis.Firstly, some rules of big diameter glass reinforced plastic mortar pipe's mechanical behavior are obtained through outside load experiments for glass reinforced plastic mortar pipe. The result shows: the material of glass reinforced plastic mortar pipe is brittle, the enlaced sample always destroyed along the interface of different layers, but the centrifugal sample destroyed along a breach; the capacity of bearing radial load of enlaced glass reinforced plastic mortar pipe is better than the centrifugal ones, the destroyed forms of them is also different.Secondly, the whole pipe and direct shear friction experiments between glass reinforced plastic mortar pipe and typical soil of Shanghai have been done. The friction factor of glass reinforced plastic mortar pipe and typical soil of Shanghai, the develop characters of friction and the effect of injecting slurry on the frictional characters are got through the experiments. The result shows: the ektexine of glass reinforced plastic mortar pipe is slipperier than concrete pipe; injecting slurry could minish the friction between soil and pipe, but the effect of minishing friction is bear...