Complete set of design drawings of 1-50m box arch bridge

2、 The fabrication process of precast arch box (I) The technological process of precasting each segment of arch box, taking the side box as an example, is roughly as follows: (II) The fabrication and installation of formwork, the binding of reinforcement, the prefabrication and assembly of blocks, the casting and curing of concrete, and the acceptance of the prefabricated arch box products must meet the requirements of construction specifications. （3） It is better to use steel formwork for blocking formwork at both ends of the box section to ensure that the plug surface is flat. The formwork shall be coated with lubricant or other measures shall be taken to reduce the release bonding force during jacking. If the bottom formwork of soil tyre is used, special attention shall be paid to the compaction, which shall be flat and solid, and no settlement or local concave convex is allowed. 　　

2、 The fabrication process of precast arch box (I) The technological process of precasting each segment of arch box, taking the side box as an example, is roughly as follows: (II) The fabrication and installation of formwork, the binding of reinforcement, the prefabrication and assembly of blocks, the casting and curing of concrete, and the acceptance of the prefabricated arch box products must meet the requirements of construction specifications. （3） It is better to use steel formwork for blocking formwork at both ends of the box section to ensure that the plug surface is flat. The formwork shall be coated with lubricant or other measures shall be taken to reduce the release bonding force during jacking. If the bottom formwork of soil tyre is used, special attention shall be paid to the compaction, which shall be flat and solid, and no settlement or local concave convex is allowed. 　　

2、 The fabrication process of precast arch box (I) The technological process of precasting each segment of arch box, taking the side box as an example, is roughly as follows: (II) The fabrication and installation of formwork, the binding of reinforcement, the prefabrication and assembly of blocks, the casting and curing of concrete, and the acceptance of the prefabricated arch box products must meet the requirements of construction specifications. （3） It is better to use steel formwork for blocking formwork at both ends of the box section to ensure that the plug surface is flat. The formwork shall be coated with lubricant or other measures shall be taken to reduce the release bonding force during jacking. If the bottom formwork of soil tyre is used, special attention shall be paid to the compaction, which shall be flat and solid, and no settlement or local concave convex is allowed. 　　

2、 The fabrication process of precast arch box (I) The technological process of precasting each segment of arch box, taking the side box as an example, is roughly as follows: (II) The fabrication and installation of formwork, the binding of reinforcement, the prefabrication and assembly of blocks, the casting and curing of concrete, and the acceptance of the prefabricated arch box products must meet the requirements of construction specifications. （3） It is better to use steel formwork for blocking formwork at both ends of the box section to ensure that the plug surface is flat. The formwork shall be coated with lubricant or other measures shall be taken to reduce the release bonding force during jacking. If the bottom formwork of soil tyre is used, special attention shall be paid to the compaction, which shall be flat and solid, and no settlement or local concave convex is allowed. 　　

Design standard: deck width: the full width of the deck is designed as two-way eight lane plus sidewalk. There are two completely independent and symmetrical bridges on the left and right in the transverse direction. Each bridge deck is 26.1m wide, and the specific composition is: 4.8m sidewalk (including guardrail)+0.5m crash barrier+15.5m roadway+0.5m crash barrier+4.8m bridge crossing water pipe and access road (including guardrail). 　　...... Bridge overview: The main bridge is a three hole 50+280+50m half through concrete-filled steel tube tied arch bridge. The main arch cushion cap is an integral solid reinforced concrete structure, and the main arch arch seat is two separate solid reinforced concrete structures, which are connected by tie beams in the middle. 　　...... Designed in 2002, there are 50 CAD design drawings in total.

2、 The fabrication process of precast arch box (I) The technological process of precasting each segment of arch box, taking the side box as an example, is roughly as follows: (II) The fabrication and installation of formwork, the binding of reinforcement, the prefabrication and assembly of blocks, the casting and curing of concrete, and the acceptance of the prefabricated arch box products must meet the requirements of construction specifications. （3） It is better to use steel formwork for blocking formwork at both ends of the box section to ensure that the plug surface is flat. The formwork shall be coated with lubricant or other measures shall be taken to reduce the release bonding force during jacking. If the bottom formwork of soil tyre is used, special attention shall be paid to the compaction, which shall be flat and solid, and no settlement or local concave convex is allowed. 　　

2、 The fabrication process of precast arch box (I) The technological process of precasting each segment of arch box, taking the side box as an example, is roughly as follows: (II) The fabrication and installation of formwork, the binding of reinforcement, the prefabrication and assembly of blocks, the casting and curing of concrete, and the acceptance of the prefabricated arch box products must meet the requirements of construction specifications. （3） It is better to use steel formwork for blocking formwork at both ends of the box section to ensure that the plug surface is flat. The formwork shall be coated with lubricant or other measures shall be taken to reduce the release bonding force during jacking. If the bottom formwork of soil tyre is used, special attention shall be paid to the compaction, which shall be flat and solid, and no settlement or local concave convex is allowed. 　　

2、 The fabrication process of precast arch box (I) The technological process of precasting each segment of arch box, taking the side box as an example, is roughly as follows: (II) The fabrication and installation of formwork, the binding of reinforcement, the prefabrication and assembly of blocks, the casting and curing of concrete, and the acceptance of the prefabricated arch box products must meet the requirements of construction specifications. （3） It is better to use steel formwork for blocking formwork at both ends of the box section to ensure that the plug surface is flat. The formwork shall be coated with lubricant or other measures shall be taken to reduce the release bonding force during jacking. If the bottom formwork of soil tyre is used, special attention shall be paid to the compaction, which shall be flat and solid, and no settlement or local concave convex is allowed. 　　

Old arch bridge, new and reinforced landscape bridge.

1. Clear span 1-40m bridge width: clear - 7+2 × 1.5m sidewalk 2. Load: automobile - highway class II, crowd - 3.5Kpa 32 drawings in total

50m special-shaped steel arch bridge with a width of 17.3m, 61 drawings in total

2、 The fabrication process of precast arch box (I) The technological process of precasting each segment of arch box, taking the side box as an example, is roughly as follows: (II) The fabrication and installation of formwork, the binding of reinforcement, the prefabrication and assembly of blocks, the casting and curing of concrete, and the acceptance of the prefabricated arch box products must meet the requirements of construction specifications. （3） It is better to use steel formwork for blocking formwork at both ends of the box section to ensure that the plug surface is flat. The formwork shall be coated with lubricant or other measures shall be taken to reduce the release bonding force during jacking. If the bottom formwork of soil tyre is used, special attention shall be paid to the compaction, which shall be flat and solid, and no settlement or local concave convex is allowed. 　　

2、 The fabrication process of precast arch box (I) The technological process of precasting each segment of arch box, taking the side box as an example, is roughly as follows: (II) The fabrication and installation of formwork, the binding of reinforcement, the prefabrication and assembly of blocks, the casting and curing of concrete, and the acceptance of the prefabricated arch box products must meet the requirements of construction specifications. （3） It is better to use steel formwork for blocking formwork at both ends of the box section to ensure that the plug surface is flat. The formwork shall be coated with lubricant or other measures shall be taken to reduce the release bonding force during jacking. If the bottom formwork of soil tyre is used, special attention shall be paid to the compaction, which shall be flat and solid, and no settlement or local concave convex is allowed. 　　

2、 The fabrication process of precast arch box (I) The technological process of precasting each segment of arch box, taking the side box as an example, is roughly as follows: (II) The fabrication and installation of formwork, the binding of reinforcement, the prefabrication and assembly of blocks, the casting and curing of concrete, and the acceptance of the prefabricated arch box products must meet the requirements of construction specifications. （3） It is better to use steel formwork for blocking formwork at both ends of the box section to ensure that the plug surface is flat. The formwork shall be coated with lubricant or other measures shall be taken to reduce the release bonding force during jacking. If the bottom formwork of soil tyre is used, special attention shall be paid to the compaction, which shall be flat and solid, and no settlement or local concave convex is allowed. 　　

The preliminary design of xx bridge is 20 prestressed concrete simple supported box girder bridge. The bridge is arranged in two lanes. The upper part is fabricated partially prestressed concrete simply supported box girder. The prefabricated box girder is 1.2 high, and the spacing between main girders is 2.9. In order to reduce the height of the main beam and the camber caused by prestress, the post tensioned prestressed concrete box girder is designed as a class A component of partially prestressed concrete under the design load, and the main beam reinforcement is mixed with prestressed reinforcement and non prestressed reinforcement. OVM15-5 anchorage shall be used, and the retraction of deformed reinforcement of anchorage shall be calculated as 4. When tensioning the steel strand, the concrete strength of the prefabricated parts shall reach more than 85% and can be tensioned. The lower pier is a reinforced concrete circular double column pier with a diameter of 1.2; The pier foundation is a single row double row bored pile foundation with a pile diameter of 1.4. The pier capping beam is a continuous pier capping beam. The internal force of the capping beam and the vertical reaction force at the top of the pier column are calculated according to the simply supported beam. The pile foundation is in the form of single row piles with a spacing of 6.7.