Analysis and Field Measurement on the Internal Force Variation Laws of Steel Pipe Columns in Subway Stations

Table 4

Axial forces increment in different construction stages of the strip foundation stations (unit: kN).

Station ID	Station	Axial force increment of the steel pipe columns
		Stage 1	Stage 2	Stage 3	Total	Remark
S1	Xiangheyuan Station	8943	2069	4606	15618
S2	Shilihe Station	—	3010	4298	7308	Stage 1 construction has been completed; when the measuring points installed
S3	Dongdaqiao Station	9843	1268	—	11108	Proceeds to stage 2 but did not implement; the midplate
S4	Guangqumen Station	9110	—	—	9110	Stages 2 and 3 have not yet been reached
S5	Mudanyuan Station	—	—	2736	2736	Construction in stages 1 and 2 has been; completed when the measuring points installed