Bridge construction method and bridge

Abstract

The present application relates to a technical field of bridge construction, and in particular to a bridge construction method and a bridge, which includes constructing bridge piers and placing bridge spans on the bridge piers, wherein a cap with a reserved groove is first integrally provided on the upper end of the bridge pier, and a plurality of rotating devices are installed in the reserved groove, a supporting portion is formed at the middle position of the bridge span, and the supporting portion is placed on a supporting plane formed on the upper surface of the cap, and then the bridge span is lifted up and separated from the supporting plane by the rotating device, and then the bridge span is rotated and simultaneously dropped onto the supporting plane by the rotating device; the rotating device repeatedly lifts and rotates the bridge span until the bridge span is rotated to a desired angle relative to the cap, and the rotating device is taken out and the bridge span is fixed on the cap. The present application has the effect of reducing the friction force on the bridge span during the rotation process.

Description

Technical Field

[0001] The present application relates to the technical field of bridge construction, and in particular to a bridge construction method and a bridge. Background Art

[0002] A bridge is a structure built over a river for vehicles and pedestrians to pass through. It is generally composed of an upper structure, a lower structure and a support. The upper structure is also called a span structure, and the lower structure includes abutments and piers. The support is a supporting device at the connection between the span structure and the piers or abutments. Bridges can be made of steel or reinforced concrete. For reinforced concrete bridges, cable hoisting, swivel installation, cantilever casting and other methods are often used during construction.

[0003] The patent document with the authorization announcement number CN105040597B discloses a bridge swivel structure, including a stainless steel slide plate, an adapter plate is arranged near the outer sides of the upper surface of the stainless steel slide plate, the bottom of the adapter plate is movably connected to the stainless steel slide plate, a block is arranged between the two adapter plates, and the two ends of the block extend into the adapter plate, the lower surface of the stainless steel slide plate is connected to a guard plate, and the guard plate and the stainless steel slide plate are connected by a built-in slide groove, and a support column is installed near the two sides of the lower surface of the guard plate, the top of the support column is fixed on the guard plate, and the bottom is fixed on the wear-resistant plate. The wear-resistant plate can play a wear-resistant role, and the horizontal rotation is relatively stable.

[0004] Wear-resistant plates are used in the above structure to reduce wear, but the bridge span still has a large friction force during the rotation process. Summary of the invention

[0005] In order to reduce the friction force on the bridge span during the rotation process, the present application provides a bridge construction method.

[0006] The present application provides a bridge construction method, which adopts the following technical solution:

[0007] A bridge construction method comprises constructing bridge piers and placing a bridge span on the bridge piers, wherein a cap with a reserved groove is first integrally provided on the upper end of the bridge pier, a plurality of rotating devices are installed in the reserved groove, a supporting portion is formed at the middle position of the bridge span, the supporting portion is placed on a supporting plane formed on the upper surface of the cap, the bridge span is then lifted up and separated from the supporting plane by the rotating device, and the bridge span is then rotated and simultaneously dropped onto the supporting plane by the rotating device; the rotating device repeatedly lifts up and rotates the bridge span until the bridge span is rotated to a desired angle relative to the cap, the rotating device is taken out and the bridge span is fixed on the cap.

[0008] By adopting the above technical scheme, when in use, a cap is firstly provided integrally at the upper end of the pier, a rotating device is placed in a reserved groove on the cap, the rotating device lifts the bridge span placed on the cap, and rotates after lifting, and falls while rotating, and then the lifting and rotating of the bridge span are repeated, so that the bridge span can be rotated to a desired angle after repeated multiple times, and further, since the bridge span is separated from the cap during the rotation process, the friction force on the bridge span during the rotation process can be reduced.

[0009] Preferably, the reserved groove is circular and a plurality of rotating devices are distributed around the central circumference of the reserved groove.

[0010] By adopting the above technical solution, the reserved groove is circular, and the rotating devices are distributed on the circumference of the center of the reserved groove, so that the rotating devices can effectively support the rotation of the bridge span at any angle, making the bridge span relatively stable during the rotation process.

[0011] Preferably, the swivel device includes a cylinder body, a piston rod, a lower support and an upper support, the lower end of the cylinder body is rotatably connected to the lower support, the piston rod is fitted in the cylinder body, and the upper end of the piston rod is rotatably connected to the upper support; when the bridge span is in the raised position, the rotation axis of the piston rod relative to the upper support is along the radial direction of the prefabricated groove and passes through the center of the prefabricated groove, and the angle of the piston rod relative to the cylinder body is in an initial state.

[0012] By adopting the above technical solution, the piston rod is fitted in the cylinder body, and the upper end of the piston rod is rotatably connected to the upper support. When the piston rod is able to lift the bridge span on the upper support, the bridge span rotates and the cylinder body tilts, so that the bridge span simultaneously descends toward the direction of the pedestal during the rotation process, thereby facilitating the control of the rotation of the bridge span. At the same time, the rotation axis of the piston rod is along the radial direction of the prefabricated groove compared to the upper support and passes through the center of the prefabricated groove, thereby stabilizing the rotation center of the bridge span during rotation and reducing deviation.

[0013] Preferably, a hydraulic cylinder is connected to the side wall of the cylinder body, one end of the hydraulic cylinder is rotatably connected to the support platform, and the other end is rotatably connected to the cylinder body, and the rotation axis of the hydraulic cylinder compared to the cylinder body is parallel to the rotation axis of the cylinder body compared to the lower support.

[0014] By adopting the above technical solution, the hydraulic cylinder is connected to the cylinder body, and the cylinder body is rotated by the hydraulic cylinder, so that the hydraulic cylinder can support the cylinder body, improve the stability of the cylinder body rotation, reduce the impact of the bridge span on the pedestal, and improve safety.

[0015] Preferably, a reset assembly is provided on the piston rod, the reset assembly includes a pin and a reset block, the reset block is provided with an embedding hole, the pin is installed on the piston rod, and one end of the pin is inserted into the embedding hole, the inner wall of the embedding hole is provided with a reset plane and a rotation inclined surface for the pin to abut, the reset plane is connected to the rotation inclined surface, and when the pin abuts against the reset plane, the piston rod is in the initial state.

[0016] By adopting the above technical solution, the pin is connected to the piston rod, and under the action of the reset plane and the rotating inclined plane, the pin can drive the piston rod to automatically reset to the initial state, and then when the piston rod rotates, it is convenient to control the center position of the bridge span rotation and reduce the deviation during the bridge span rotation.

[0017] Preferably, the piston rod is provided with an elongated hole, the length direction of the elongated hole is parallel to the length direction of the piston rod, a guide hole is provided in the piston rod, the guide hole is parallel to the length direction of the piston rod, a guide rod is inserted in the guide hole, one end of the guide rod is fixed on the pin, the pin is inserted into the elongated hole, a return spring is placed in the guide hole, one end of the return spring abuts against the bottom of the guide hole, and the other end abuts against the guide rod, and the force of the return spring acting on the guide rod drives the pin to move toward one end of the piston rod connected to the upper support.

[0018] By adopting the above technical solution, the pin is located in the elongated hole. When the piston rod moves, the pin can slide in the elongated hole. At the same time, when the piston rod is fixed relative to the length direction of the cylinder body, the pin can move on the rotating inclined plane, making it easier for the pin to drive the piston rod to reset.

[0019] Preferably, when the pin is moved upward by the reset spring to abut against the upper side wall of the embedding hole, the pin is located at a position where the reset plane and the rotating inclined surface are connected.

[0020] By adopting the above technical solution, when the pin moves to the upper part of the embedding hole, the pin is at the junction of the reset plane and the rotating inclined plane, so that when the piston rod rotates, the pin can easily transition from the reset plane to the rotating inclined plane, reducing the piston rod from getting stuck in the rotation direction.

[0021] Preferably, a gap for taking out the swivel device is reserved between the support portion and the edge of the reserved groove.

[0022] By adopting the above technical solution, the staff can enter the reserved groove through the gap, so that the staff can dismantle the rotating device in the reserved groove and then take out the rotating device in the reserved groove.

[0023] Preferably, a plurality of steel bars extending into a reserved groove are arranged at the center of the support portion, and the reserved groove is cast to form a filling body, and the bridge span and the pedestal are connected by the steel bars located in the filling body.

[0024] By adopting the above technical solution, steel bars are arranged at the center of the support part. When the filling body is poured in the reserved groove, the steel bars can be buried in the filling body, thereby making the connection between the bridge span and the pedestal more stable.

[0025] In order to reduce the friction force on the bridge span during the rotation process, the present application provides a bridge.

[0026] This application provides a bridge, which adopts the following technical solution:

[0027] A bridge is constructed using the bridge construction method.

[0028] By adopting the above technical solution, the bridge span is rotated after being separated from the abutment, which can reduce the damage to the bridge span, improve the quality of the bridge span, and reduce the friction during the installation of the bridge span.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] 1. The swivel device is placed in the reserved groove on the cap, and the swivel device lifts the bridge span placed on the cap, and rotates after lifting, and falls while rotating. After repeated multiple times, the bridge span can be rotated to the required angle, and the bridge span is separated from the cap, reducing the friction force on the bridge span during the rotation process;

[0031] 2. The rotation axis of the piston rod is along the radial direction of the precast groove and passes through the center of the precast groove compared to the upper support, so that the rotation center of the bridge span is stable during rotation and the deviation is reduced;

[0032] 3. When the piston rod moves, the pin can slide in the long hole. At the same time, when the piston rod is fixed relative to the length direction of the cylinder body, the pin can move on the rotating inclined plane, which makes it easier for the pin to drive the piston rod to reset and improve the stability of the bridge span rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0034] Figure 2 It is a schematic diagram of the explosion structure of an embodiment of the present application;

[0035] Figure 3 It is a schematic diagram of the overall structure of the rotating device;

[0036] Figure 4 It is a schematic diagram of the internal structure of the piston rod;

[0037] Figure 5 It is a schematic diagram of the full cross-section structure of the bridge span after rotation according to the embodiment of the present application.

[0038] Explanation of the accompanying reference numerals: 1. Pier; 2. Abutment; 21. Reserved groove; 22. Support plane; 3. Bridge span; 31. Support part; 32. Rebar; 4. Rotating device; 41. Cylinder body; 42. Piston rod; 421. Long hole; 422. Guide hole; 43. Lower support; 44. Upper support; 45. Hydraulic cylinder; 5. Gap; 6. Reset assembly; 61. Pin; 62. Reset block; 621. Embedded hole; 622. Reset plane; 623. Rotating inclined plane; 63. Guide rod; 64. Reset spring; 7. Filling body. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1-5 This application is described in further detail.

[0040] The present application embodiment discloses a bridge construction method. Figure 1 and Figure 2 , including constructing a bridge pier 1, a cap 2 is provided at the upper end of the bridge pier 1, a bridge span 3 is provided on the cap 2, the bridge span 3 is placed on the cap 2, a rotating device 4 is installed between the cap 2 and the bridge span 3, the bridge span 3 is rotated by the rotating device 4, the rotating device 4 is taken out, and then the cap 2 and the bridge span 3 are connected.

[0041] refer to Figure 1 and Figure 2 The bridge pier 1 is formed by pouring concrete materials, and a cap 2 is integrally formed at the upper end of the bridge pier 1. The cap 2 is a truncated cone with a larger upper part and a smaller lower part. The center of the cap 2 is supported on the bridge pier 1. A reserved groove 21 is provided on the upper end surface of the cap 2, and a support plane 22 is formed on the upper end surface of the cap 2. The support plane 22 is the portion left after the circular reserved groove 21 is provided on the upper end surface of the cap 2. A support portion 31 is formed at the middle position of the lower part of the bridge span 3. The lower surface of the support portion 31 is rectangular and is used to be placed on the support plane 22. A plurality of steel bars 32 are provided at the center position of the support portion 31, and the steel bars 32 can extend into the reserved groove 21.

[0042] refer to Figure 1 and Figure 2 When installing the swivel device 4, the swivel device 4 is placed in the reserved groove 21, and the width of the lower surface of the support portion 31 is smaller than the diameter of the reserved groove 21, so that a gap 5 is left between the support portion 31 and the edge of the reserved groove 21. The position of the gap 5 is large enough for the staff to enter, so that the staff can enter the reserved groove 21 to disassemble and remove the swivel device 4.

[0043] refer to Figure 2 and Figure 3There are multiple swivel devices 4, and the multiple swivel devices 4 are distributed in a circle along the center of the reserved groove 21. The swivel device 4 is used to support and rotate the lower surface of the support part 31, so that the bridge as a whole rotates relative to the pedestal 2. The swivel device 4 includes a cylinder 41, a piston rod 42, a lower support 43 and an upper support 44. The lower support 43 is fixed at the bottom of the reserved groove 21. One end of the cylinder 41 is rotatably connected to the lower support 43. The rotation axis of the cylinder 41 relative to the lower support 43 is along the radial line of the reserved groove 21 and passes through the center of the reserved groove 21. The piston rod 42 is fitted inside the cylinder 41, and the piston rod 42 is extended and retracted relative to the cylinder 41 by connecting the hydraulic system. The upper support 44 is rotatably connected to the piston rod 42. When the piston rod 42 pushes the bridge span 3 upward, the rotation axis of the upper support 44 relative to the piston rod 42 is parallel to the rotation axis of the lower support 43 relative to the cylinder 41. A hydraulic cylinder 45 is connected to the cylinder body 41, one end of the hydraulic cylinder 45 is rotatably connected to the bottom surface of the reserved groove 21, and the other end is rotatably connected to the side wall of the cylinder body 41, and the rotation axis of the hydraulic cylinder 45 compared to the cylinder body 41 is parallel to the rotation axis of the cylinder body 41 compared to the lower support 43, so that the hydraulic cylinder 45 can drive the cylinder body 41 to swing when working.

[0044] Rotate the bridge span 3: first adjust the cylinder body 41 to a vertical position through the hydraulic cylinder 45, and move the piston rod 42 upward relative to the cylinder body 41 so that the piston rod 42 extends out of the cylinder body 41, and the upper support 44 is against the lower surface of the support part 31, and the force is continued to be applied to lift the bridge span 3 placed on the support plane 22 through multiple rotating devices 4, and stop lifting the bridge span 3 when the lower surface of the support part 31 reaches a position where the distance between it and the support plane 22 is 1-3cm. The hydraulic cylinder 45 works, and multiple cylinder bodies 41 rotate simultaneously under the action of the hydraulic cylinder 45, so that the bridge span 3 rotates relative to the pedestal 2, and during the rotation of the bridge span 3, due to the inclination of the cylinder body 41, the distance between the lower surface of the support part 31 and the support plane 22 gradually decreases until the lower surface of the support part 31 is re-supported on the support plane 22, and the upper support 44 is detached from the lower surface of the support part 31, thereby reducing the friction between the bridge span 3 and the pedestal 2 during the rotation of the bridge span 3; then when the upper support 44 is detached from the lower surface of the support part 31, the piston rod 42 contracts first, and the hydraulic cylinder 45 drives the cylinder body 41 to adjust to a vertical position, and the piston rod 42 moves upward again relative to the cylinder body 41 to lift the bridge span 3, and the rotation of the bridge span 3 is repeated until the bridge span 3 rotates to the desired angle. By separating the bridge span 3 from the pedestal 2 during the rotation, the damage to the bridge span 3 during rotation can be reduced.

[0045] refer to Figure 3, a reset assembly 6 is provided on the piston rod 42. When the upper support 44 hits the support portion 31, the reset assembly 6 resets the rotation axis of the piston rod 42 relative to the upper support 44 to be parallel to the rotation axis of the cylinder body 41 relative to the lower support 43. The reset assembly 6 includes a pin 61 and a reset block 62. The reset block 62 is fixed to the cylinder body 41. An embedding hole 621 is provided on the reset block 62. The inner wall of the embedding hole 621 forms a reset plane 622 and a rotation inclined surface 623. The reset plane 622 is vertically arranged and located at the upper part of the embedding hole 621. The rotation inclined surface 623 is connected to the reset plane 622 and is arranged obliquely with the reset plane 622. The rotation inclined surface 623 is located at the lower part of the embedding hole 621. The pin 61 is arranged on the piston rod 42 and the pin 61 is arranged perpendicular to the piston rod 42. The end side wall of the pin 61 abuts against the reset plane 622 or the rotating inclined surface 623. When the piston rod 42 moves upward and makes the upper support 44 press against the support part 31, the pin 61 abuts against the reset plane 622, so that the pin 61 drives the piston rod 42 to reset to the initial position where the rotation axis of the piston rod 42 relative to the upper support 44 is parallel to the rotation axis of the cylinder body 41 relative to the lower support 43; then when the bridge span 3 rotates relative to the base 2, the piston rod 42 rotates relative to the cylinder body 41, and at the same time, the pin 61 transitions from the reset plane 622 to the rotating inclined surface 623 and moves along the rotating inclined surface 623.

[0046] refer to Figure 3 and Figure 4A long hole 421 is provided on the piston rod 42, and the long hole 421 is arranged along the length direction of the piston rod 42. The pin 61 is located in the long hole 421 and both ends of the pin 61 extend out of the long hole 421. The center line of the pin 61 is perpendicular to and intersects with the center line of the piston rod 42. A guide hole 422 is opened inside the piston rod 42. The guide hole 422 is along the length direction of the piston rod 42. A guide rod 63 is inserted into the guide hole 422. The guide rod 63 is slidably fitted in the piston rod 42 through the guide hole 422, and one end of the guide rod 63 is fixed on the pin 61. A return spring 64 is arranged inside the guide hole 422. The return spring 64 is a coil spring. One end of the return spring 64 abuts against the bottom of the guide hole 422, and the other end abuts against one end of the guide rod 63 away from the pin 61. The force of the return spring 64 on the guide rod 63 drives the guide rod 63 and the pin 61 to move toward one end of the piston rod 42 close to the upper support 44. When the pin 61 reaches the position where the reset plane 622 intersects the rotating inclined surface 623, the end of the pin 61 abuts against the upper side wall of the embedding hole 621, so that the position of the pin 61 stops, and the piston rod 42 can continue to extend relative to the cylinder body 41 and lift the bridge span 3; then when the bridge span 3 rotates relative to the base 2, the piston rod 42 rotates relative to the cylinder body 41, so that the pin 61 compresses the reset spring 64 and the pin 61 moves along the rotating inclined surface 623. After the upper support 44 is disengaged from the support portion 31, the pin 61 moves along the rotating inclined surface 623 to a position abutting against the reset plane 622, so that the piston rod 42 rotates and returns to its initial position.

[0047] refer to Figure 1 and Figure 5 When the bridge span 3 rotates 90 degrees relative to the cap 2, the staff enters the reserved groove 21 from the gap 5 and takes out each rotating device 4. Concrete is poured into the reserved groove 21 to form a filling body 7 in the reserved groove 21, and the steel bars 32 extend into the filling body 7, so that the bridge span 3 and the cap 2 are connected through the filling body 7.

[0048] This embodiment also discloses a bridge, which is built using the above-mentioned bridge construction method.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for building a bridge, comprising building a bridge pier (1) and placing a bridge span (3) on the bridge pier (1), characterized in that: The upper end of the bridge pier (1) is firstly provided with a cap (2) with a reserved groove (21), and a plurality of rotating devices (4) are installed in the reserved groove (21). A support portion (31) is formed in the middle of the bridge span (3), and the support portion (31) is placed on a supporting plane (22) formed on the upper surface of the cap (2). The bridge span (3) is then lifted up and separated from the supporting plane (22) by the rotating device (4), and then the bridge span (3) is rotated and simultaneously dropped onto the supporting plane (22) by the rotating device (4); the rotating device (4) repeatedly lifts up and rotates the bridge span (3) until the bridge span (3) is relative to the supporting plane (22). The support platform (2) is rotated to a desired angle, the swivel device (4) is taken out and the bridge span (3) is fixed on the support platform (2), the reserved groove (21) is circular and a plurality of swivel devices (4) are distributed around the central circumference of the reserved groove (21); the swivel device (4) comprises a cylinder body (41), a piston rod (42), a lower support (43) and an upper support (44), the lower end of the cylinder body (41) is rotatably connected to the lower support (43), the piston rod (42) is fitted in the cylinder body (41), and the upper end of the piston rod (42) is rotatably connected to the upper support (44); the bridge span (3) is at the top When the piston rod (42) is in the raised position, the rotation axis of the piston rod (42) relative to the upper support (44) is along the radial direction of the prefabricated groove and passes through the center of the prefabricated groove, and the angle of the piston rod (42) relative to the cylinder body (41) is in the initial state; a hydraulic cylinder (45) is connected to the side wall of the cylinder body (41), one end of the hydraulic cylinder (45) is rotatably connected to the support platform (2), and the other end is rotatably connected to the cylinder body (41), and the rotation axis of the hydraulic cylinder (45) relative to the cylinder body (41) is parallel to the rotation axis of the cylinder body (41) relative to the lower support (43); a reset The reset component (6) comprises a pin (61) and a reset block (62), the reset block (62) is provided with an embedding hole (621), the pin (61) is mounted on the piston rod (42), and one end of the pin (61) is inserted into the embedding hole (621), the inner wall of the embedding hole (621) is provided with a reset plane (622) and a rotating inclined plane (623) for the pin (61) to abut against, the reset plane (622) is connected to the rotating inclined plane (623), and when the pin (61) abuts against the reset plane (622), the piston rod (42) is in the initial state;The piston rod (42) is provided with an elongated hole (421), the length direction of the elongated hole (421) is parallel to the length direction of the piston rod (42), the piston rod (42) is provided with a guide hole (422), the guide hole (422) is parallel to the length direction of the piston rod (42), a guide rod (63) is inserted into the guide hole (422), one end of the guide rod (63) is fixed on the pin (61), the pin (61) is inserted into the elongated hole (421), a return spring (64) is placed in the guide hole (422), one end of the return spring (64) abuts against the bottom of the guide hole (422), and the other end abuts against the guide rod (63), the force of the return spring (64) acting on the guide rod (63) drives the pin (61) to move toward one end of the piston rod (42) connected to the upper support (44). ; 2. A bridge construction method according to claim 1, characterized in that: When the pin (61) is moved upward by the reset spring (64) to abut against the upper side wall of the embedding hole (621), the pin (61) is located at a position where the reset plane (622) and the rotating inclined plane (623) are connected.

3. A bridge construction method according to claim 1, characterized in that: A gap (5) for taking out the rotating device (4) is reserved between the supporting portion (31) and the edge of the reserved groove (21).

4. A bridge construction method according to claim 1, characterized in that: A plurality of steel bars (32) extending into the reserved groove (21) are arranged at the center of the support portion (31); the reserved groove (21) is cast to form a filling body (7); and the bridge span (3) and the pedestal (2) are connected by the steel bars (32) located in the filling body (7).

5. A bridge, characterized in that: A bridge constructed by using a bridge construction method as described in any one of claims 1-4.

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