Deflection Mechanism and Treatment Technology of Permanent Derrick of Freeze Sinking on Deep Alluvium

Table 3

Distribution of main soil layers.

Number of soil layers	Name of soil layer	Thickness of layer (m)	Accumulative thickness (m)
1	Cultivated soil and sandy clay	8.28	8.28
2	Sandy clay	8.9	17.18
3	Silt	2.30	19.48
4	Sandy clay	8.1	27.58
5	Silt	3.20	30.78
6	Clayey soil	6.20	36.98
7	Silty fine sand	3.20	40.18