Foundation Construction Device and Its Construction Method

A foundation construction device is characterized in that foundation construction device includes fixed guide (1) and combined device (2), which is used for the construction of foundation (4) with chain blade (3) at the bottom. Device (1) consists of fixed frame (1-1) and guide (1-2). Device (2) includes chain blade power transmission device (2-1), spoil treatment device (2-2), and rack (2-3). Device (2-1) and device (2-2) are installed on rack (2-3). Device (2-1), foundation (4), and chain blade (3) constitute chain excavating device (5). Foundation (4) is the rack of chain excavating device (5), while chain blade (3) only excavates the rock and soil at the bottom of foundation (4). Chain blade (3) is composed of chain (3-1) and cutter (3-2) fixed on chain (3-1) for rock and soil excavation. Device (1) guides foundation (4) and/or device (2) to make foundation (4) in a straight state. During construction, device (2) is connected with the top of foundation (4), and device (2-1) drives chain blade (3) to run along the track of foundation (4). Chain blade (3) excavates the rock and soil at the bottom of foundation (4), and transports the excavated rock and soil to the top. Device (2-2) separates the rock and soil transported from the bottom of foundation (4) by chain blade (3) from chain blade (3), and device (2) and foundation (4) descend synchronously.