A Practical Swelling Constitutive Model of Anhydrite and Its Application on Tunnel Engineering

Figure 2

The left are the oedometer apparatuses linked with the data auto sampling system. The right is one of the test apparatuses. ① Computer used for indication. ② Loading frame, which can be moved away when measuring the vertical deformation without loading. ③ Dial gauge linking with the computer. ④ Water container, into which a sample is put.