Medium weathered Limestone: the rock mass is broken and is often cut into rock masses. How to make a pile foundation?
Especially calcareous rock formations (limestone), should pay attention to whether or not there is a cave, which is more troublesome.
In general, medium weathered rock is a better bearing stratum. But it should also be analyzed according to the actual situation. If the whole and the whole are the best, the weak rocks and the imperfect ones are less, and they need to be noticed when they are broken.
For fractured rock formations, it must not be determined directly by the standard values of rock uniaxial compressive strength. The ultimate value of the bearing capacity at the end of the pile is better determined by the local work experience of the survey unit. If there is a condition, it is better to verify it by static load test.
