VIP exclusive Construction Scheme for Old Bridge Demolition of Bridge Works
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There are three old bridges at xx of the expressway in the west section of xxxx, crossing xx, xx and xx respectively. Due to the low design standard of the old bridge, it is difficult to meet the requirements of heavy load and large traffic flow of the expressway. According to the construction drawing, the old bridge needs to be demolished to build a new bridge. (1) Xx bridge 1. The old bridge crossing xx in structural form is ordinary reinforced concrete simply supported beam, with bridge width of about 26m. The superstructure is 1.0 × 8.0 × 0.35m ordinary reinforced concrete hollow slab. The pier is a pile column pier. The width × height of the capping beam is 90 × 80cm, the diameter of the column is 80cm, and the height is about 1.5m. The abutment is a gravity abutment. There is a tie beam at the bottom of the north column of the two water piers. The normal water level is+2.0m, and the water depth is about 1.0m. The schematic diagram of section structure is as follows. 2. Main demolition contents and quantities Bridge deck system: railing, reinforced concrete pavement and demolition of 3 spans (25 pieces) of beams and slabs, 6 capping beams, 6 abutment caps, 6 abutment bodies, 6 cushion caps, 14 columns and 2 tie beams. The pile foundations are cast-in-place bored piles (II) xx bridge 1. The structure of the old bridge crossing xx is ordinary reinforced concrete simply supported beam, and the bridge width is about 25.5m. The superstructure is 1.0 × 8.0 × 0.35m ordinary reinforced concrete hollow slab. The pier is a pile column pier. The width × height of the capping beam is 90 × 80cm, the diameter of the column is 80cm, and the height is about 1.5m. The abutment is a gravity abutment. There is a tie beam at the bottom of the north column of the two water piers. The normal water level is+2.0m, and the water depth is about 0.5m. The schematic diagram of section structure is as follows. 2. Main demolition contents and quantities Bridge deck system: railing, reinforced concrete pavement and demolition of 3 spans (25 pieces) of beams and slabs, 6 capping beams, 6 abutment caps, 6 abutment bodies, 6 cushion caps, 14 columns and 2 tie beams. All pile foundations are bored piles. (3) Xx bridge crosses xx old bridge, which is ordinary reinforced concrete simply supported beam with width of about 25.7m. The superstructure is 1.0 × 8.0 × 0.35m ordinary reinforced concrete hollow slab. The pier is a pile column pier. The cover beam width × height is 90 × 80cm, the column diameter is 80cm, and the height is about 1.5m. The abutment is a gravity abutment. The normal water level is+2.0, and the water depth is about 0.5m. The schematic diagram of the section structure is as follows. 2. Main demolition contents and quantities Bridge deck system: railing, reinforced concrete pavement and demolition of 3 spans (25 pieces) of beams and slabs, 6 capping beams, 6 abutment caps, 6 abutment bodies, 6 cushion caps, 18 columns and 2 tie beams. All pile foundations are bored piles.