Bridge erecting method for mountainous area

Abstract

The invention discloses a bridge erecting method for a mountainous area, and belongs to the technical field of bridge construction. The method comprises the following steps: S1, constructing a pier foundation at a designated position of a mountain area according to a construction drawing, and maintaining; s2, a hoisting truss fixed to a mountain is erected above the constructed pier foundation, and then a plurality of hoisting trolleys are arranged on the hoisting truss; s3, after the hoisting trolley is arranged, at least one concrete pump station and a pumping pipe mechanism are arranged on the hoisting truss in a sliding mode, and then the concrete pump station and the pumping pipe mechanism are connected through a pipeline; s4, the steel pipe column is hoisted to the pier foundation through the hoisting trolley, and one end of the steel pipe column is bolted to the pier foundation; and S5, the pumping pipe mechanism is moved to the position over the other end of the steel pipe column, then a concrete pump station is started, and concrete is poured into the steel pipe column. The technical scheme is used for improving the bridge erection construction effect in mountainous areas.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge construction, and in particular relates to a bridge erection method used in mountainous areas. Background Art

[0002] During the construction of traditional bridges, traditional scaffolding is generally used for construction, and on-site casting construction mode is adopted. The construction period is long, the overall energy consumption is high, the on-site manual workload is large, and the labor cost is soaring. In addition, the traditional bridge construction scaffolding supports the cast-in-place construction, which has great safety hazards and has a great impact on the city's environment and traffic.

[0003] Especially in mountainous areas, due to the undulating terrain and the large height difference of bridge pier construction, large equipment cannot be moved and constructed on the mountain, that is, large lifting equipment cannot reach the predetermined position, and the lifting height is difficult to meet the height requirements of bridge pier construction; at the same time, the use of bracket method for bridge construction also faces the constraints of extra-high brackets and high safety risks. Therefore, a bridge erection method for mountainous areas is proposed. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a bridge erection method for mountainous areas, so as to improve the effect of bridge construction and erection in mountainous areas.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention provides a bridge erection method for mountainous areas, comprising the following steps:

[0007] S1. Construct bridge pier foundations at designated locations in mountainous areas according to construction drawings and carry out maintenance;

[0008] S2. A hoisting truss fixed on the mountain is erected above the completed bridge pier foundation, and then a number of hoisting trolleys are set on the hoisting truss;

[0009] S3. After the hoisting trolley is set, at least one concrete pumping station and a pumping pipe mechanism are slidably set on the hoisting truss, and then the concrete pumping station and the pumping pipe mechanism are connected through pipelines;

[0010] S4. Hoist the steel pipe column onto the pier foundation by means of a hoisting trolley, and bolt one end of the steel pipe column onto the pier foundation;

[0011] S5, move the pumping pipe mechanism to the top of the other end of the steel pipe column, then start the concrete pump station to pour concrete into the steel pipe column;

[0012] S6. After pouring is completed, the pier cap is hoisted to the other end of the steel pipe column by a hoisting trolley, and the pier cap is bolted and fixed to the steel pipe column;

[0013] S7. When the construction of two adjacent bridge piers is completed, the bridge deck is hoisted and placed on the pier cap by a hoisting trolley;

[0014] S8. Repeat steps S4-S7 until the bridge construction is completed.

[0015] Furthermore, after step S7, the method further includes: after the bridge deck construction is completed, sliding the concrete pump station to a position above one end of the bridge deck close to the unconstructed area, and temporarily connecting the concrete pump station to the bridge deck.

[0016] Further, in step S5, a pipe hanging mechanism is slidably provided on the lifting truss, and the pipe hanging mechanism is used to control the vertical movement of the pumping pipe mechanism so that the pumping pipe mechanism is lifted uniformly from the bottom end to the upper end of the steel pipe column for grouting.

[0017] Further, in step S3, the pumping pipe mechanism includes a flexible pump pipe, one end of which is connected to the pipeline, and the other end of which is provided with an end pumping assembly, and the end pumping assembly includes a mounting pipe, one end of which is connected to the other end of the flexible pump pipe, and a hollow conical cylinder is provided inside the mounting pipe, and the conical cylinder is slidably connected to the inside of the mounting pipe, and the small diameter end of the conical cylinder is arranged toward the discharge direction of concrete, and a plurality of connecting rods are provided on the circumference of the outer surface of the mounting pipe, and one end of the connecting rod is rotatably connected to the outer side surface of the mounting pipe. A roller is provided on the other end of the connecting rod, and a traction rope is provided on the surface of the connecting rod near the rotation connection portion with the mounting tube, one end of the traction rope is fixed on the connecting rod, and the other end of the traction rope passes through the mounting tube and is fixedly connected to the small diameter end of the tapered tube inside the mounting tube, and the traction rope is slidably connected to the mounting tube, and a retaining ring is provided on the inner side surface of the other end of the mounting tube, and a spring is provided on the retaining ring, one end of the spring is fixed on the retaining ring, and the other end of the spring is fixed to the outer side surface of the large diameter end of the tapered tube, and the tapered tube is arranged inside the spring.

[0018] Furthermore, a fixing ring is provided on the outer side of the mounting tube, a fixing rod is provided on the fixing ring, and the fixing rod fixes the fixing ring to the outer side surface of the mounting tube, and a fixed pulley matching the number of connecting rods is provided on the fixing ring, and a plurality of the traction ropes are arranged in a one-to-one correspondence with a plurality of fixed pulleys, and the traction ropes are wound around the fixed pulleys.

[0019] Furthermore, an elastic rope is provided on the outer side of one end of the roller of the connecting rods, one end of the elastic rope is fixed on the connecting rod, and the other end of the elastic rope is fixed on the outer side of the mounting tube near one end of the flexible pump tube.

[0020] Furthermore, a slip ring is provided above the large diameter end of the conical tube, the outer surface of the slip ring is in sliding contact with the inner side surface of the mounting tube, and the conical tube is fixed on the slip ring.

[0021] The beneficial effects of the present invention are:

[0022] In this technical solution, the proposed bridge erection method can overcome the undulating environment in mountainous areas for construction, and at the same time, it can also carry out hoisting and pouring construction at the piers with large drop, which greatly improves the effect of bridge erection in mountainous areas, reduces the difficulty of bridge erection in mountainous areas and shortens the construction period of bridge erection in mountainous areas.

[0023] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0025] Figure 1 It is a schematic plan view of the bridge erection method of the present invention;

[0026] Figure 2 It is a three-dimensional schematic diagram of a pumping pipe mechanism in the bridge erection method of the present invention;

[0027] Figure 3 It is a schematic cross-sectional view of a pumping pipe mechanism in the bridge erection method of the present invention;

[0028] Figure 4 It is an internal schematic diagram of a pumping pipe mechanism in the bridge erection method of the present invention;

[0029] Figure 5 It is a plan view schematic diagram of the pumping pipe mechanism acting on the inner ratio of the steel pipe column in the bridge erection method of the present invention.

[0030] The following are marked in the accompanying drawings:

[0031] 1. Lifting truss; 2. Lifting trolley; 3. Concrete pump station; 4. Pier cap; 5. Pier foundation; 6. Steel pipe column; 7. Pumping pipe mechanism; 71. Flexible pump pipe; 72. Mounting pipe; 73. Connecting rod; 74. Roller; 75. Traction rope; 76. Fixed ring; 77. Fixed pulley; 78. Fixed block; 79. Fixed rod; 710. Elastic rope; 711. Slip ring; 712. Conical cylinder; 713. Retaining ring; 714. Spring; 8. Bridge deck. DETAILED DESCRIPTION

[0032] like Figure 1 to Figure 5 As shown, the present invention provides a bridge erection method for mountainous areas, comprising the following steps:

[0033] S1. Construct bridge pier foundation 5 at the designated location in the mountainous area according to the construction drawings and carry out maintenance;

[0034] S2. A lifting truss 1 fixed on the mountain is erected above the completed bridge pier foundation 5, and then a number of lifting trolleys 2 are arranged on the lifting truss 1. It should be noted that how the lifting truss 1 is fixed to the ground or the mountain, how the lifting trolley 2 is slidably arranged on the lifting truss 1, and how the lifting trolley 2 is lifted are all existing technologies, and reference can be made to equipment such as overhead cranes or bridge erecting machines in the existing technologies, and no further elaboration is made here. Preferably, the lifting truss 1 can be fixed at one end to simplify the fixing construction steps, and at the same time, the method of fixing one end on the mountain can also reduce the use of fixing parts, making it suitable for construction in mountainous areas with a large drop (fixed at the higher end).

[0035] S3. After the hoisting trolley 2 is set up, at least one concrete pumping station 3 and a pumping pipe mechanism 7 are slidably set on the hoisting truss 1, and then the concrete pumping station 3 and the pumping pipe mechanism 7 are connected through a pipeline; it should be noted that the working principle of the concrete pumping station 3 and the pumping pipe mechanism 7 can refer to the specific method of the concrete pouring structure in the prior art, and no further elaboration is made here. At the same time, the concrete pumping station 3 and the pumping pipe mechanism 7 can be slidably connected to the hoisting truss 1 through a pulley, and a driving motor and a connecting rope can be set on the wheel changer, thereby driving the two to slide on the hoisting truss 1. This method can be easily thought of by those skilled in the art, and no further elaboration is made here.

[0036] S4, hoisting the steel pipe column 6 onto the pier foundation 5 by the hoisting trolley 2, and bolting one end of the steel pipe column 6 onto the pier foundation 5;

[0037] S5. Move the pumping pipe mechanism 7 to the top of the other end of the steel pipe column 6, and then start the concrete pump station 3 to pour concrete into the steel pipe column 6. By pouring concrete into the steel pipe column 6 to form the pier body, the lifting weight of the lifting truss 1 can be greatly reduced, thereby reducing the lifting load.

[0038] S6. After the pouring is completed, the pier cap 4 is hoisted on the other end of the steel pipe column 6 by the hoisting trolley 2, and the pier cap 4 is bolted and fixed on the steel pipe column 6;

[0039] S7, when the construction of two adjacent bridge piers is completed, the bridge deck 8 is hoisted and placed on the pier cap 4 by the hoisting trolley 2;

[0040] S8. Repeat steps S4-S7 until the bridge construction is completed.

[0041] In one feasible method, after step S7, the method further includes: after the construction of the bridge deck 8 is completed, the concrete pump station 3 is slid to a position above one end of the bridge deck 8 close to the unconstructed area, and the concrete pump station 3 is temporarily connected to the bridge deck 8. The advantage of this method is that it can be moved along with the construction of the bridge, thereby greatly reducing the layout distance of the pipeline between the concrete pump station 3 and the pumping pipe mechanism 7, and simplifying the structure of the entire system.

[0042] In one feasible manner, in step S5, a pipe hanging mechanism is slidably provided on the lifting truss 1, and the pipe hanging mechanism is used to control the vertical movement of the pumping pipe mechanism 7, so that the pumping pipe mechanism 7 is lifted uniformly from the bottom end to the upper end of the steel pipe column 6 for grouting. The pipe hanging structure can be understood as a combination of a winding wheel and a lifting rope. The length of the lifting rope is controlled by the winding wheel, and then the height of the pumping pipe mechanism 7 connected to the lifting rope is controlled, so that the pumping pipe mechanism 7 is poured from the lower end to the upper end of the steel pipe column 6 at a uniform speed, thereby ensuring the pouring effect and avoiding the problem of pouring concrete directly from a high place into the steel pipe column 6, which causes the concrete to fall and segregate, and the problem of uneven pouring causing bubbles to be generated inside, resulting in poor concrete pouring effect.

[0043] It should also be noted that in order to facilitate the up and down movement of the pumping pipe mechanism 7, the concrete delivery pipe in the pumping pipe mechanism 7 adopts a pumping hose, which can change the bending degree of the pumping hose through the action of the suspension rope, thereby controlling the height of the end of the pumping hose, thereby realizing the grouting operation from bottom to top. The reason for not using a rigid pumping pipe is that in mountainous areas, the terrain is undulating and the height difference of each pier is large. The telescopic design of the rigid pumping pipe must meet the requirements of a short length after contraction and a long length after extension, so that it can be suitable for the casting of bridge piers in mountainous areas. Obviously, this design is difficult to achieve and complicated. Therefore, it is simpler and more practical to directly use a flexible pumping pipe.

[0044] Therefore, in one practicable manner, in step S3, the pumping pipe mechanism 7 includes a flexible pump pipe 71 (pumping hose), one end of the flexible pump pipe 71 is connected to the pipeline, and the other end of the flexible pump pipe 71 is provided with an end pumping assembly, and the end pumping assembly includes a mounting pipe 72, one end of the mounting pipe 72 is connected to the other end of the flexible pump pipe 71, and a hollow conical cylinder 712 is provided inside the mounting pipe 72, and the conical cylinder 712 is slidably connected to the inside of the mounting pipe 72, and the small diameter end of the conical cylinder 712 is arranged toward the discharge direction of concrete, and a plurality of connecting rods 73 are circumferentially provided on the outer surface of the mounting pipe 72, and one end of the connecting rod 73 is rotatably connected to the outer surface of the mounting pipe 72, and the connecting rod 73 is vertically The connecting rod 73 rotates in a straight plane, and a roller 74 is provided on the other end of the connecting rod 73. A traction rope 75 is provided on the surface of the connecting rod 73 near the rotation connection portion with the mounting tube 72. One end of the traction rope 75 is fixed to the connecting rod 73, and the other end of the traction rope 75 passes through the mounting tube 72 and is fixedly connected to the small diameter end of the tapered tube 712 inside the mounting tube 72. The traction rope 75 is slidably connected to the mounting tube 72. A retaining ring 713 is provided on the inner side surface of the other end of the mounting tube 72, and a spring 714 is provided on the retaining ring 713. One end of the spring 714 is fixed on the retaining ring 713, and the other end of the spring 714 is fixed to the outer side surface of the large diameter end of the tapered tube 712. The tapered tube 712 is arranged inside the spring 714.

[0045] The working principle of the above technical solution is:

[0046] When pouring concrete, the concrete pump station 3 pumps the concrete into the flexible pump tube 71. Under the action of gravity and pumping pressure, the discharge diameter of the conical cylinder 712 is reduced, so the concrete will accumulate on the top of the conical cylinder 712, and then slowly discharge under the action of the concrete gravity and pressure. That is, the setting of the conical cylinder 712 can reduce the discharge speed of the concrete, avoid the problem of segregation and bubble generation during pouring due to too fast speed, and at the same time, under the action of the pressure of the concrete, the conical cylinder 712 will be driven to compress the spring 714 downward, and in the process of moving, it will drive the traction rope 75 to move, and then the traction rope 75 will pull the connecting rod 73 to rotate, so that the connecting rod 73 can rotate. The rod 73 is spread outward, so that the roller 74 on the connecting rod 73 is in close contact with the inner wall of the steel pipe column 6, thereby limiting the position of the installation tube 72, so that the installation tube 72 always maintains the center position of the steel pipe column 6, and the poured concrete is evenly diffused outward from the middle of the steel pipe column 6, thereby improving the pouring effect. At the same time, due to the strong wind in mountainous areas, this method can also limit the position of the pouring end, so that it will not swing and move up and down due to the action of wind, thereby further improving the pouring effect of concrete (if the pouring part swings, the concrete collides and contacts with the inner wall of the steel pipe column 6, it will cause the aggregate and slurry of the concrete to separate, causing segregation).

[0047] It should also be noted that the setting of the end pumping assembly is equivalent to adding a counterweight to the end of the flexible pump pipe 71, that is, it will reduce the swing of the flexible pump pipe 71 when the wind acts, and thus facilitate the lifting of the end of the flexible pump pipe 71 to the inside of the steel pipe column 6. After the pouring is completed, the conical cylinder 712 loses the gravity of the concrete and automatically retracts and returns to its original position under the action of the spring 714. The rotation angle of the connecting rod 73 can control the distance between the ends of the connecting rod 73 in the horizontal plane, and thus this setting method can be applied to steel pipe columns 6 of different diameters. It should be noted that the traction rope 75 is set at one end of the connecting rod 73 for rotation, so that the traction rope 75 can drive the connecting rod 73 to rotate 90° to achieve the maximum extension distance when the traction rope 75 moves a shorter distance. It is not difficult to understand that when the roller 74 contacts and presses against the inner wall of the steel pipe column 6, the movement of the traction rope 75 is limited, and then the conical cylinder 712 cannot continue to slide, thereby realizing that it can press against the inner wall of the steel pipe column 6 of different diameters.

[0048] In one feasible manner, a fixing ring 76 is provided on the outer side of the mounting tube 72, and a fixing rod 79 is provided on the fixing ring 76. The fixing rod 79 fixes the fixing ring 76 to the outer side surface of the mounting tube 72, and a fixed pulley 77 matching the number of the connecting rods 73 is provided on the fixing ring 76. The fixed pulley 77 is rotatably set on the fixing ring 76, and fixed blocks 78 are provided at both ends to limit the lateral movement of the fixed pulley 77. A plurality of traction ropes 75 are arranged in a one-to-one correspondence with the plurality of fixed pulleys 77, and the traction rope 75 is wound around the fixed pulley 77. This arrangement can improve the moving effect of the traction rope 75 and reduce the moving resistance.

[0049] In one practicable manner, an elastic rope 710 is provided on the outer side of one end of the roller 74 of the plurality of connecting rods 73, one end of the elastic rope 710 is fixed to the connecting rod 73, and the other end of the elastic rope 710 is fixed to the outer side of the mounting tube 72 near one end of the flexible pump tube 71. The setting of the elastic rope 710 can keep the initial position of the connecting rod 73 in an inclined state, such as Figure 2 As shown, this has the advantage of reducing the end volume of the end pumping assembly, thereby facilitating its hoisting into the steel pipe column 6.

[0050] In one feasible manner, a slip ring 711 is provided above the large diameter end of the conical cylinder 712, and the outer surface of the slip ring 711 slides in contact with the inner side surface of the mounting tube 72, and the conical cylinder 712 is fixed on the slip ring 711. The provision of the slip ring 711 can increase the contact area between the end of the conical cylinder 712 and the inner wall of the mounting tube 72, thereby improving the sliding effect and preventing the conical cylinder from tilting inside the mounting tube 72.

[0051] It should also be noted that the method part in this scheme mainly proposes a method step that can be used to build bridges in mountainous areas. The method step involves the connection mode, connection relationship and lifting and pumping principle of the lifting truss 1, lifting trolley 2, concrete pump station 3 and pumping pipe mechanism 7. After those skilled in the art understand the specific conception of the method, it can be achieved through existing technology. Therefore, this part of the structure is not described in detail.

[0052] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A method for erecting a bridge in a mountainous area, characterized in that: The steps include: S1. Construct bridge pier foundations (5) at designated locations in mountainous areas according to construction drawings and perform maintenance; S2, erecting a hoisting truss (1) fixed on the mountain above the completed bridge pier foundation (5), and then arranging a plurality of hoisting trolleys (2) on the hoisting truss (1); S3, after the installation of the hoisting trolley (2) is completed, at least one concrete pumping station (3) and a pumping pipe mechanism (7) are slidably installed on the hoisting truss (1), and then the concrete pumping station (3) and the pumping pipe mechanism (7) are connected through a pipeline; S4, hoisting the steel pipe column (6) onto the bridge pier foundation (5) by means of a hoisting trolley (2), and bolting one end of the steel pipe column (6) onto the bridge pier foundation (5); S5, moving the pumping pipe mechanism (7) to the position directly above the other end of the steel pipe column (6), and then starting the concrete pumping station (3) to pour concrete into the interior of the steel pipe column (6); S6. After the pouring is completed, the pier cap (4) is hoisted onto the other end of the steel pipe column (6) by the hoisting trolley (2), and the pier cap (4) is bolted and fixed onto the steel pipe column (6); S7. When the construction of two adjacent bridge piers is completed, the bridge deck (8) is hoisted and placed on the pier cap (4) by a hoisting trolley (2); S8. Repeat steps S4-S7 until the bridge construction is completed.

2. A method for erecting a bridge in a mountainous area according to claim 1, characterized in that: After step S7, the method further includes: after the construction of the bridge deck (8) is completed, sliding the concrete pump station (3) to a position above an end of the bridge deck (8) close to the unconstructed area, and temporarily connecting the concrete pump station (3) to the bridge deck (8).

3. A bridge erection method for mountainous areas according to claim 1, characterized in that: In step S5, a pipe hanging mechanism is slidably provided on the lifting truss (1), and the pipe hanging mechanism is used to control the vertical movement of the pumping pipe mechanism (7), so that the pumping pipe mechanism (7) is lifted from the bottom end to the top end of the steel pipe column (6) at a uniform speed for grouting.

4. A method for erecting a bridge in a mountainous area according to claim 1, characterized in that: In step S3, the pumping pipe mechanism (7) includes a flexible pump pipe (71), one end of which is connected to the pipeline, and the other end of which is provided with an end pumping assembly, and the end pumping assembly includes a mounting pipe (72), one end of which is connected to the other end of the flexible pump pipe (71), and a hollow conical cylinder (712) is provided inside the mounting pipe (72), and the conical cylinder (712) is slidably connected to the inside of the mounting pipe (72), and the small diameter end of the conical cylinder (712) is arranged toward the discharge direction of concrete, and a plurality of connecting rods (73) are circumferentially provided on the outer surface of the mounting pipe (72), one end of which is rotatably connected to the outer surface of the mounting pipe (72), and a roller is provided on the other end of the connecting rod (73). (74), a traction rope (75) is provided on the surface of the connecting rod (73) near the rotation connection portion with the mounting tube (72), one end of the traction rope (75) is fixed on the connecting rod (73), the other end of the traction rope (75) passes through the mounting tube (72) and is fixedly connected to the small diameter end of the conical tube (712) inside the mounting tube (72), the traction rope (75) is slidably connected to the mounting tube (72), a retaining ring (713) is provided on the inner side surface of the other end of the mounting tube (72), a spring (714) is provided on the retaining ring (713), one end of the spring (714) is fixed on the retaining ring (713), the other end of the spring (714) is fixed on the outer side surface of the large diameter end of the conical tube (712), and the conical tube (712) is arranged inside the spring (714).

5. A method for erecting a bridge in a mountainous area according to claim 4, characterized in that: A fixing ring (76) is provided on the outer side of the mounting tube (72), a fixing rod (79) is provided on the fixing ring (76), and the fixing rod (79) fixes the fixing ring (76) to the outer side surface of the mounting tube (72), and a number of fixed pulleys (77) matching the number of connecting rods (73) are provided on the fixing ring (76), and a plurality of the traction ropes (75) and the plurality of fixed pulleys (77) are arranged in a one-to-one correspondence, and the traction ropes (75) are wound around the fixed pulleys (77).

6. A bridge erection method for mountainous areas according to claim 4, characterized in that: An elastic rope (710) is provided on the outer side surface of one end of the connecting rod (73) where the roller (74) is arranged. One end of the elastic rope (710) is fixed to the connecting rod (73), and the other end of the elastic rope (710) is fixed to the outer side surface of the mounting tube (72) near one end of the flexible pump tube (71).

7. A method for erecting a bridge in a mountainous area according to claim 4, characterized in that: A slip ring (711) is provided above the large diameter end of the conical tube (712), the outer surface of the slip ring (711) is in sliding contact with the inner side surface of the mounting tube (72), and the conical tube (712) is fixed on the slip ring (711).

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