Detail design of general structural node of abutment anti-collision wall of double arch bridge

3. The vertical projection of the arch axis (perpendicular to the arch springing line) in the driving direction is an arc 4. The arch line of pier and abutment is horizontal, and the height of side walls on both sides, please control the construction according to the elevation in the table 5. An expansion joint with a width of 2 to 3 cm shall be set above the arch foot of the abutment. The filler in the joint can be sawdust and asphalt, and the precast slab shall be made by 1:1. The precast slab shall be embedded during construction; Asphalt sand or other suitable materials can also be used 6. The arch filler shall be slag, broken brick, crushed stone, gravel, pebble, etc 7. Under the anti-collision wall, one cast iron drain pipe, four pipes/hole, is set at 1/4 span on both sides 8. When pouring capstone concrete, anti-collision wall reinforcement shall be embedded

3. The vertical projection of the arch axis (perpendicular to the arch springing line) in the driving direction is an arc 4. The arch line of pier and abutment is horizontal, and the height of side walls on both sides, please control the construction according to the elevation in the table 5. An expansion joint with a width of 2 to 3 cm shall be set above the arch foot of the abutment. The filler in the joint can be sawdust and asphalt, and the precast slab shall be made by 1:1. The precast slab shall be embedded during construction; Asphalt sand or other suitable materials can also be used 6. The arch filler shall be slag, broken brick, crushed stone, gravel, pebble, etc 7. Under the anti-collision wall, one cast iron drain pipe, four pipes/hole, is set at 1/4 span on both sides 8. When pouring capstone concrete, anti-collision wall reinforcement shall be embedded

1. Reinforced concrete slab arch, calculated span L=20.0m, bridge width B=10.0m; 2. Bridge type: the superstructure is reinforced concrete slab arch. The height of the main arch ring is 60cm, and the span loss ratio is 1:8. The main arch ring is arc line. The substructure is pile group foundation, bored pile, and the pile diameter is φ 100cm; 3. Design load: crowd: 4.5KN/m2;

2. The upper structure adopts pretensioned prestressed concrete hollow slab, the lower pier adopts thin-walled pier and expanded foundation, and the abutment adopts U-shaped abutment and expanded foundation. 3. The bearing capacity of pier and abutment base is 350KPa. 4. The bridge deck is paved with 6~10cm asphalt concrete+10cm # 50 waterproof concrete. 5. The bridge is equipped with a WABO Wanbao embedded expansion device at abutment 0 and abutment 2 respectively. 　　

2. Design standard According to the requirements of the assignment, the design load of this bridge is steam level 20 and hanging level 100. The bridge is 7.5m wide and the carriageway is 6.5m wide. Cement concrete deck is adopted. 3. Geology of the bridge site The landform of the bridge site belongs to the intermountain valley landform, and the terrain elevation varies from 37.00m to 45.00m. The two banks are the alluvial terraces of the Xinxing West River. Because of water storage and power generation, the water depth is always about 3.00m~4.00m. Stratum characteristics at the bridge site are Quaternary alluvium (clay, loam and round gravel) and Cambrian sedimentary rock (weakly weathered sandy shale, strongly weathered sandstone and weakly weathered sandstone) from top to bottom. The seismic fortification intensity of the site is 6 degrees, and the design basic seismic acceleration value is 0.05g. 　　

1. Reinforced concrete slab arch, calculated span L=20.0m, bridge width B=10.0m; 2. Bridge type: the superstructure is reinforced concrete slab arch. The height of the main arch ring is 60cm, and the span loss ratio is 1:8. The main arch ring is arc line. The substructure is pile group foundation, bored pile, and the pile diameter is φ 100cm; 3. Design load: crowd: 4.5KN/m2;

1. Reinforced concrete slab arch, calculated span L=20.0m, bridge width B=10.0m; 2. Bridge type: the superstructure is reinforced concrete slab arch. The height of the main arch ring is 60cm, and the span loss ratio is 1:8. The main arch ring is arc line. The substructure is pile group foundation, bored pile, and the pile diameter is φ 100cm; 3. Design load: crowd: 4.5KN/m2;

Diaphragm of main beam: no diaphragm is set for the span L ≤ 20m, and only one end diaphragm is set at the beam end for the simply supported box girder L=25m and L=30m. The position of diaphragm reinforcement framework shall be accurately set out during construction to create conditions for smooth welding and binding of overlapping reinforcement. Bearing: round plate rubber bearing is adopted for medium bridge. The bridge adopts Teflon plate rubber bearing. Expansion joints: 60 and 80 type shallow buried steel expansion joints are recommended. One deck drain pipe is set for each half bridge of the pier. Holes shall be reserved when prefabricating flange plates of outer beams.

1. Reinforced concrete slab arch, calculated span L=20.0m, bridge width B=10.0m; 2. Bridge type: the superstructure is reinforced concrete slab arch. The height of the main arch ring is 60cm, and the span loss ratio is 1:8. The main arch ring is arc line. The substructure is pile group foundation, bored pile, and the pile diameter is φ 100cm; 3. Design load: crowd: 4.5KN/m2;

1. Reinforced concrete slab arch, calculated span L=20.0m, bridge width B=10.0m; 2. Bridge type: the superstructure is reinforced concrete slab arch. The height of the main arch ring is 60cm, and the span loss ratio is 1:8. The main arch ring is arc line. The substructure is pile group foundation, bored pile, and the pile diameter is φ 100cm; 3. Design load: crowd: 4.5KN/m2;

This drawing is the general structural node diagram of simply supported beam abutment

This drawing is a general structural drawing of simply supported beam abutment cone slope

2. The main bridge of the superstructure is an 80+80m double hole prestressed concrete partial cable-stayed bridge, and the approach bridges are 1X32m and 4X32m prestressed concrete constant cross-section box continuous beams, respectively. The substructure is a reinforced concrete U-shaped abutment, slab pier, and bored pile foundation. 3. Design load of this bridge: urban level A, automobile - over 20, trailer - 120 checking calculation. 4. The clearance under the bridge along the river is not less than 3.5m.