Variable section cement-soil gravity type retaining wall and construction method thereof

The invention discloses a variable section cement-soil gravity type retaining wall and a construction method thereof. The retaining wall comprises a main wall body which consists of main cement mixed pile bodies, and an attached wall body which is positioned below the bottom face of a foundation pit and on one side or two sides of the main wall body, is connected with the main wall body and consists of attached cement mixed pile bodies, wherein the main wall body and the attached wall body form the variable section retaining wall. The construction method comprises the following steps of: forming the main wall body by using a cement mixed pile machine, forming the attached wall body, and excavating empty pile parts, so that the variable section cement-soil gravity type retaining wall is formed by the main wall body which consists of the main cement mixed pile bodies and is positioned above the bottom of the foundation pit, and the main wall body consisting of the main cement mixed pile bodies and the attached