Untitled research work

The rubble foundation for the immersed tunnel under construction in the Bosphorus strait is build by using the tremie pipe and the grader equipment due to the large depth and strong currents in the strait. The rubble-dumping simulator to predict the height distribution of dumped rubble was developed in order to obtain the optimum rubble volume and positions for dumping. In the simulator, the dumped rubble distribution is estimated by two parameters, the dispersion coefficient and the angle of repose of the rubble.The field test for building the rubble foundation was performed at the construction site. The two parameters of the rubble were examined from the test. Then it was confirmed that the dumped rubble distribution was simulated well by the simulator. And it's succeeded to build the accurate rubble foundation under the sever sea state by the construction technique using the tremie pipe and the grader equipment.