3D Rock Tunnel Software Development And Its Application Based On Key Block Theory

The tunnel structure technique, as part of basic facilities, has developed greatly both in quantity and quality in China recently. Among these tunnel structures, numerous of which are built up in the mountain area and the fact brings many problems that as a kind of non-continuous media, the mechanical property of rock mass is quite different from the soil mass.The existence of the structural planes in the rock mass affects the mechanical property dramatically so the distribution and mechanical property of the structural planes should be investigated if we want to study intensive parameters for the tunnel structures. The fact shows that transformation and failure of rock mass depend on the structural plane's property and so the tunnel structure's stability depends on the rock mass' structural planes. The blocks, which are shaped by the structural planes cutting through the rock mass, are easily becomes the "key blocks" around the tunnel structures by means of the disturbance in the construction process. These "key blocks" may cause severe consequences for the safety of workers and the tunnel structure itself.In this study, on the basis of many papers, all kinds of structural planes theory and the block theory are discussed in the first. Then taking the safety of tunnel structures as the research object and using Monte Carlo and the object-oriented method, the Geotechnical Structure and Model Analysis 1.0(GeoSMA 1.0) is developed. In this part, this paper introduces the treating process for inputting data and algorithm and also the mixed procedure of Visual C++ and openGL for picturing and rotating the tunnel structures in three dimension spaces. Finally, we analysis the stability of HanJiaLing tunnel structure by using GeoSMA 1.0.