Accurate geostress material is the vital precondition to make geotechnical engineering quantitative calculation and realize the engineering design optimization. Only by comprehensively mastering the geostress situation around the project, can the arrangement be ensured reasonably. Therefore, it would reduce the excavation and supporting costs to improve the economic benefit of the project on the premise that the surrounding rock was ensured stable.
Considering the general arrangement of the project, two points should be payed attention to:
- In the weak rock mass, the direction of the axis should keep consistent with the direction of the biggest principal stress in the arrangement of the underground construction such as tunnels. Then pass through the fault or other weak rock mass zone.
- The principle to choose the best section in the underground construction is that its geometrical shape and dimension should be adapt to the functioning method of the geostress.