Road structure reconstructed from large-scale independent underground garage and construction method thereof

A road structure reconstructed from large-scale independent underground garage, comprising a front straight section, a middle transition section, and a rear double-deck road section, wherein a settlement joint (12) is provided both between the front straight section and the middle transition section and between the middle transition section and the rear double-deck road section,

• wherein the front straight section comprises a floor plate (1), a drainage hole (15) is provided in the floor plate (1), graded crushed stones (2) are provided on the floor plate (1), foamed concrete (3) is filled in blocks on the graded crushed stones (2), a wood formworks (16) fixedly is provided at each side of each block of the foamed concrete (3), a bitumastic oakum flexible material (17) is filled between adjacent wood formworks (16), a top of the foamed concrete (3) is fixedly connected to a roof plate (4), a waterproof membrane (5) is laid on the roof plate (4), a clay layer (6) is provided on the waterproof membrane (5), slag (7) is provided on the clay layer (6) and is filled in layers, a central drainage pipeline (9) is provided inside the slag (7), longitudinal drainage pipelines (10) are buried at both sides of the slag (7), a transversal drainage pipeline (14) is provided between the central drainage pipeline (9) and the longitudinal drainage pipelines (10), and a road structure layer (8) is fixedly connected with an upper part of the slag (7), a partially preserved garage (20) is provided on a left side of the front straight section, the settlement joint (12) is provided between the partially preserved garage (20) and a reconstructed partially underground garage (35), the reconstructed partially underground garage (35) comprises frame columns (13), a steel reinforced concrete sealing wall (21) is provided along the frame columns (13), rebars are embedded inside the frame columns (13), the floor plate (1), and the roof plate (4) to form a steel reinforcement cage (31), an upper support (37) is provided under the roof plate (4), and a lower support (30) is provided on the floor plate (1), the upper support (37) and the lower support (30) are fixedly connected to the steel reinforcement cage (31) to form the steel reinforced concrete sealing wall (21), a partition wall (11) is provided at a right side of the settlement joint (12), and the waterproof membrane (5) is laid between a right side of the partition wall (11) and the wood formworks (16), a side wall (19) of an original underground garage is provided at a right side of the front straight section and the side wall (19) of the original underground garage is fixedly connected to the floor plate (1) and the road structure layer (8),
• wherein the middle transition section comprises the floor plate (1), the drainage hole (15) is provided in the floor plate (1), the graded crushed stones (2) are provided on the floor plate (1), the foamed concrete (3) is provided on the graded crushed stones (2), the clay layer (6) is laid at the top of the foamed concrete (3), the slag (7) is provided and filled in layers on the clay layer (6), the central drainage pipeline (9) is provided inside the slag (7), the longitudinal drainage pipelines (10) are buried at both sides of the slag (7), the transversal drainage pipeline (14) is provided between the central drainage pipeline (9) and the longitudinal drainage pipelines (10), an upper part of the slag (7) is fixedly connected to the road structure layer (8), the partially preserved garage (20) is provided on a left side of the middle transition section, the settlement joint (12) is provided between the partially preserved garage (20) and the reconstructed partially underground garage (35), the partition wall (11) is provided at the right side of the settlement joint (12), the side wall (19) of the original underground garage is provided at a right side of the middle transition section, the side wall (19) of the original underground garage is fixedly connected to the floor plate (1) and the road structure layer (8), the settlement joint (12) comprises foaming agent (32), cement mortar mixed with lost circulation material (33) is laid on the foaming agent (32), a waterstop strip (34) is fixedly connected to a top of the cement mortar mixed with the lost circulation material (33), the waterproof membrane (5) is fixedly connected to a top of the waterstop strip (34), and the wood formworks (16) are fixedly connected to a top of the waterproof membrane (5),
• wherein the rear double-deck road section comprises the frame columns (13), rebars (18) are embedded inside the frame columns (13), the partition wall (11) provided along a road direction, a girder (24) is fixedly connected to an upper side of the partition wall (11) in a transverse direction, an upper of the roof plate (4) is fixedly connected to an upper plate (23) and an lower side of the roof plate (4) is fixedly connected to a lower plate (29), a concrete layer (22), the slag (7), the road structure layer (8) are laid on the upper plate (23) from bottom to top in sequence, the central drainage pipeline (9) is provided inside the concrete layer (22), the longitudinal drainage pipelines (10) buried on both sides of the concrete layer (22), the transversal drainage pipeline (14) is provided between the central drainage pipeline (9) and the longitudinal drainage pipelines (10), a road structure subcrust (28), a concrete base (27), a coarse asphalt lower surface course (26), and a fine asphalt surface course (25) are laid on the floor plate (1) in sequence, a lower layer drainage system (40) is provided inside the concrete base (27), and comprises a lower layer horizontal drainage pipe (41), a lower layer longitudinal drainage pipe (38), and an inspection well (39), the lower layer horizontal drainage pipe (41) is laid perpendicular to a direction of the road, the lower layer longitudinal drainage pipe (38) is laid along both sides of the direction of the road, and the inspection well (39) is provided at a connection part of the lower layer horizontal drainage pipe (41) and the lower layer longitudinal drainage pipe (38), the partially preserved garage (20) is provided on a left side of the rear double-deck road section, the settlement joint (12) is provided between the partially preserved garage (20) and the reconstructed partially underground garage (35), the partition wall (11) is provided at the right side of the settlement joint (12), the side wall of the original underground garage (19) is provided at a right side of the rear double-deck road section, and the right side (19) of the rear double-deck road section is fixedly connected to the floor plate (1) and the road structure layer (8).