Deformation control method for deep foundation pit support structure in water-rich stratum

The invention discloses a deformation control method for a deep foundation pit support structure in a water-rich stratum, which relates to the technical field of foundation pit construction and comprises the following steps of: performing separation construction on the whole foundation pit by adopting a three-shaft stirring pile, and dewatering the foundation pit as required according to a separation result; recharge wells are arranged around the station, and recharge measures are taken according to the water level change situation outside the pit caused by rainfall; geological radar detection is carried out on traffic roads and the ground surface within the preset range of the foundation pit, and WSS grouting reinforcement is carried out on the uncompact and void areas of the ground according to the radar detection report result and the corresponding depth; and pre-buried sleeve valve pipe tracking grouting reinforcement is conducted on the building within the influence range of the foundation pit, so that r