Metro,Connection passage,Artificial frozen soil,Mechanical behavior,Freezing temperature,Forst heave ratio,Thaw settlement coefficient," />
Experimental Study on the Mechanical Behavior of Artificial Frozen Soil in the Guangzhou Metro Connection Passage Project
Abstract The mechanical behavior parameters of frozen soil are an important reference for engineering designand construction. To ensure the security and rationality of construction, some tests were carried out concerning the uniaxial unconfined compression strength, bending strength, failure deflection, freezing temperature, frost heave ratio, and thaw settlement coefficient of frozen soils using the example of a connection passage of the Guangzhou metro line 6. The results show that: uniaxial unconfined compressive strength of various soil layers is greatly improved at -10°C compared with that at a natural state, reaching 6.43~9.48MPa; the bending strength is between 2.97MPa and 5.67MPa; the failure strain and the failure defection meet the construction requirements; the frozen temperature is between -0.5°C and 0.6°C; the frost heave ratio is 10.79%~12.44%; and the thaw settlement coefficient is 11.06%~13.48%.
Abstract：
The mechanical behavior parameters of frozen soil are an important reference for engineering designand construction. To ensure the security and rationality of construction, some tests were carried out concerning the uniaxial unconfined compression strength, bending strength, failure deflection, freezing temperature, frost heave ratio, and thaw settlement coefficient of frozen soils using the example of a connection passage of the Guangzhou metro line 6. The results show that: uniaxial unconfined compressive strength of various soil layers is greatly improved at -10°C compared with that at a natural state, reaching 6.43~9.48MPa; the bending strength is between 2.97MPa and 5.67MPa; the failure strain and the failure defection meet the construction requirements; the frozen temperature is between -0.5°C and 0.6°C; the frost heave ratio is 10.79%~12.44%; and the thaw settlement coefficient is 11.06%~13.48%.
.Experimental Study on the Mechanical Behavior of Artificial Frozen Soil in the Guangzhou Metro Connection Passage Project[J] MODERN TUNNELLING TECHNOLOGY, 2013,V50(5): 118-122
2013, Vol. 50 