Formwork supporting device for inclined pile open cut tunnel arch part of concrete-filled steel tube arch bridge

Abstract

The utility model discloses a formwork supporting device for a concrete-filled steel tube arch bridge inclined pile open cut tunnel arch portion, and relates to the technical field of inclined pile open cut tunnel formwork supporting. Comprising a steel bottom rod, a plurality of arc steel rods and a bearing supporting rod, and the arc steel rods are sequentially spliced to form a semicircular support; one ends of the two arc steel rods located at the two ends of the support are installed at the two ends of the steel bottom rod respectively, and the bearing supporting rod is installed between the semicircular support and the steel bottom rod and used for supporting the semicircular support. Due to the arrangement of the steel bottom rods, the bearing supporting rods, the arc steel rods and the like, the arch formwork supporting device is simple in structure, low in cost and convenient to use, the quality of an open cut tunnel can be guaranteed, it is guaranteed that steel bars and stiff frameworks do not deform in the open cut tunnel arch construction process, and the appearance quality of a steel bar protection layer and concrete is qualified; installation is more convenient, entrance of hoisting equipment can be greatly reduced, and construction risks are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of oblique pile open hole formwork, in particular to a formwork device for an oblique pile open hole arch part of a steel tube concrete arch bridge. Background Art

[0002] At present, in the construction of steel tube concrete arch bridges, inclined piles are used in some arch bridges because they can better overcome the characteristics of poor geology and clear force. The construction process must first involve the construction of open holes. Since the inclined piles of bridges are generally located on the edge of steep cliffs, large-scale machinery and equipment are difficult to enter the site for construction, and there is a certain slope at the bottom of the inclined pile open hole, it is difficult to set up a construction platform, and the safety risk is relatively large, resulting in difficulties in the construction of the open hole arch. Therefore, the utility model proposes a new solution to solve the above problems. Utility Model Content

[0003] The utility model aims to provide a formwork device for the arch part of the oblique pile open hole of a steel tube concrete arch bridge, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above purpose, the utility model provides the following technical solutions: a formwork device for the arch of the open-hole arch of the inclined pile of the steel tube concrete arch bridge, comprising: a steel bottom rod, an arc steel rod, and a load-bearing support rod;

[0005] There are a plurality of arc steel rods, which are sequentially spliced ​​into a semicircular bracket; one end of the two arc steel rods at both ends of the bracket is respectively installed at the two ends of the steel bottom rod;

[0006] The load-bearing support rod is installed between the semicircular support and the steel bottom rod to support the semicircular support.

[0007] Furthermore, regarding this solution, blocks are provided near both ends of the steel bottom rod, between the two blocks is the formwork area of ​​the inclined pile open hole, and one end of the two arc steel rods located at both ends of the bracket respectively abuts against the opposite side of the two blocks.

[0008] Further to this solution, a connecting plate is fixed to one end of the two arc steel rods connected to the steel bottom rod, and the connecting plate includes an arc rod, and a support rod is fixed on the side of the arc rod facing the formwork area, and the arc rod is adapted to the curvature of the arc steel rod and extends outward.

[0009] Further to this solution, a connecting seat is installed on the steel bottom rod, and the connecting seat includes a carrier block, a partition block is fixedly installed in the middle of the carrier block, side panels are fixed on both sides of the partition block, and grooves are formed between the side panels, the carrier block and both sides of the partition block.

[0010] Furthermore, regarding this solution, at least one oblique support rod is arranged between the two sides of the load-bearing support rod and the steel bottom rod, one end of the oblique support rod is against the groove, and the other end of the oblique support rod is against the support rod side of the connecting plate, and a connecting piece is arranged at one end of the oblique support rod close to the arc steel rod.

[0011] According to the claim, a formwork device for the arch of an oblique pile open hole of a steel tube concrete arch bridge is characterized in that: the connecting piece comprises a steel hoop sleeved on the surface of the oblique support rod, the steel hoop slides along the oblique support rod, and a welding plate is fixed on the side of the steel hoop close to the arc steel rod;

[0012] A convex block is fixed on the surface of the oblique support rod, a threaded rod is screwed in the middle of the convex block, and one end of the threaded rod is rotatably connected to a side of the steel hoop away from the welding plate.

[0013] Further to this solution, a plurality of rib plates with a thickness of ≤20 cm are fixed to the side of each of the arc steel rods away from the formwork area.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The formwork device for the arch of the oblique pile open hole of the steel tube concrete arch bridge is provided with a steel bottom rod, a load-bearing support rod and an arc steel rod. The device has a simple structure, low cost, is easy to use, and can ensure the quality of the open hole. It ensures that the steel bars and the rigid skeleton of the open hole arch are not deformed during the construction process, and the steel bar protective layer and the concrete appearance quality are qualified. During the overall construction process, the installation is more convenient, and the entry of hoisting equipment can be greatly reduced, thereby reducing the construction risk.

[0016] At the same time, the formwork device does not require a construction platform, which improves the construction efficiency and saves construction time. At the same time, the device can be reused, which is economical and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front structural schematic diagram of the utility model;

[0018] Figure 2 This is a schematic diagram of the connecting seat structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the connector structure of the utility model.

[0020] In the figure: 1. Steel bottom rod; 2. Load-bearing support rod; 3. Oblique support rod; 4. Connecting piece; 401. Steel hoop; 402. Threaded rod; 403. Bump; 404. Welding plate; 5. Connecting plate; 6. Connecting seat; 601. Carrying block; 7. Arc steel rod. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] like Figure 1 - Figure 3 As shown, the utility model provides a technical solution: Figure 1 - Figure 3 As shown, the utility model provides a technical solution: a formwork device for the arch of the oblique pile open hole of a steel tube concrete arch bridge, comprising: a steel bottom rod 1, an arc steel rod 7, and a load-bearing support rod 2;

[0023] A plurality of arc steel rods 7 are provided, and the arc steel rods 7 are sequentially spliced ​​to form a semicircular bracket; one end of the two arc steel rods 7 at the two ends of the bracket is respectively installed at the two ends of the steel bottom rod 1;

[0024] The load-bearing support rod 2 is installed between the semicircular bracket and the steel bottom rod 1 to support the semicircular bracket. The top end of the load-bearing support rod 2 is set to an arc rod shape that matches the arc surface of the arc steel rod 7, which makes the support more stable and convenient for welding.

[0025] To ensure the smooth implementation of this embodiment, it is necessary to understand that a stop block 101 is provided near the ends of both ends of the steel bottom rod 1, and between the two stop blocks 101 is the formwork area for the inclined pile open hole. One end of the two arc steel rods 7 located at both ends of the bracket is respectively against the opposite side of the two stop blocks 101, which is convenient for positioning and installation.

[0026] To ensure the smooth implementation of this embodiment, it is necessary to understand that one end of the two arc steel rods 7 connected to the steel bottom rod 1 is fixed with a connecting plate 5, and the connecting plate 5 includes an arc rod 501, and a support rod 502 is fixed on the side of the arc rod 501 facing the formwork area. The arc rod 501 is adapted to the curvature of the arc steel rod 7 and extends outward. With the support of this structure, the splicing of several arc steel rods 7 is more convenient, and there is no need to weld while splicing to keep them fixed. In addition, the oblique support rod 3 can also maintain relative stability by resting on the support rod 502, which facilitates the subsequent welding process and is simpler.

[0027] like Figure 1 and Figure 2As shown, in order to ensure the smooth implementation of this embodiment, it is necessary to understand that a connecting seat 6 is installed on the steel bottom rod 1, and the connecting seat 6 includes a carrier block 601, a partition block 603 is fixedly installed in the middle of the carrier block 601, and side panels 602 are fixed on both sides of the partition block 603. Notches are formed between the side panels 602, the carrier block 601 and the two sides of the partition block 603. Through the setting of the connecting seat 6, one end of the oblique support rod 3 and the load-bearing support rod 2 can effectively rest on the connecting seat 6, thereby avoiding the process of welding and fixing at the beginning, reducing the construction process, and simplifying the installation steps.

[0028] like Figure 1 and Figure 3 As shown, in order to ensure the smooth implementation of this embodiment, it is necessary to understand that at least one inclined support rod 3 is arranged between the two sides of the load-bearing support rod 2 and the steel bottom rod 1, one end of the inclined support rod 3 is against the groove, and the other end of the inclined support rod 3 is against the side of the support rod 502 of the connecting plate 5, and a connecting piece 4 is arranged at one end of the inclined support rod 3 close to the arc steel rod 7. The device is connected to the arc steel rod 7 through the connecting piece 4 and is finally welded and supported to ensure that the steel bars and the rigid skeleton are not deformed during the construction of the open arch.

[0029] like Figure 1 and Figure 3 As shown, in order to ensure the smooth implementation of this embodiment, it is necessary to understand that the connecting member 4 includes a steel hoop 401 which is sleeved on the surface of the oblique support rod 3, and the steel hoop 401 slides along the oblique support rod 3. A welding plate 404 is fixed to the side of the steel hoop 401 close to the arc steel rod 7, and a protrusion 403 is fixed to the surface of the oblique support rod 3. A threaded rod 402 is screwed to the middle of the protrusion 403, and one end of the threaded rod 402 is rotatably connected to the side of the steel hoop 401 away from the welding plate 404. During the installation process, one end of the oblique support rod 3 is placed against the groove, and the other end is placed on one side of the supporting rod 501. After the installation is completed, the threaded rod 402 is rotated to lift the steel hoop 401 forward through the threaded rod 402 until the welding plate 404 contacts the arc steel rod 7, and then the welding plate 404 and the arc steel rod 7 are welded and fixed.

[0030] To ensure the smooth implementation of this embodiment, it should be understood that a plurality of ribs 701 with a thickness of ≤20 cm are fixed on the side of each arc steel rod 7 away from the formwork area to fix the sleepers when laying the formwork.

[0031] The formwork device for the arch of the open hole is semicircular, with an I10 steel as the steel bottom bar 1 at the bottom, and both ends are pre-buried in the upper part of the side wall of the open hole. The arch is made of I10 steel with a radius of 8 cm less than the radius of the arch of the open hole (sleepers and template space are reserved), and the two ends of the arc steel rod 7 at both ends are welded and fixed to the steel bottom bar 1. Three I10 steels are used as support beams at the center of the circle and welded to the arch arc to divide the semicircular arc into four equal parts. According to the structural size of the open hole, the length of the steel bottom bar 1 of the formwork device and the radius of the arc steel rod 7 are determined, and according to the depth of the open hole and the angle of the inclined pile, the number of racks of the formwork device and the height difference of adjacent racks are determined. The longitudinal spacing of the racks should be set to 50 cm, and the longitudinal arrangement of the racks is fixed by steel bar spot welding;

[0032] The semicircular bracket is made symmetrically on both sides to ensure that the arc of the arch is evenly stressed and the line shape is smooth;

[0033] A 5cmΦ16 steel bar is set every 30cm on the arc to facilitate the fixing of the sleepers when laying the formwork.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is limited by the attached embodiments and their equivalents.

Claims

1. A formwork device for the arch of an oblique pile open hole of a steel tube concrete arch bridge, characterized in that: include: Steel bottom rod (1), arc steel rod (7), load-bearing support rod (2); A plurality of arc steel rods (7) are provided, and the arc steel rods (7) are sequentially spliced ​​to form a semicircular bracket; one end of the two arc steel rods (7) located at the two ends of the bracket is respectively mounted on the two ends of the steel bottom rod (1); The load-bearing support rod (2) is installed between the semicircular support and the steel bottom rod (1) to support the semicircular support.

2. A formwork device for an open arch of a steel tube concrete arch bridge with inclined piles according to claim 1, characterized in that: The steel bottom rod (1) is provided with abutment blocks (101) near the ends of both ends, and between the two abutment blocks (101) is a formwork area for the oblique pile open hole, and one end of two arc steel rods (7) located at the two ends of the bracket abuts against opposite sides of the two abutment blocks (101) respectively.

3. The formwork device for the open arch of a steel tube concrete arch bridge with inclined piles according to claim 1, characterized in that: A connecting plate (5) is fixed to one end of each of the two circular arc steel rods (7) connected to the steel bottom rod (1), wherein the connecting plate (5) comprises an arc rod (501), a support rod (502) is fixed to the side of the arc rod (501) facing the formwork area, and the arc rod (501) is adapted to the curvature of the circular arc steel rod (7) and extends outward.

4. A formwork device for an open arch of a steel tube concrete arch bridge with inclined piles according to claim 1, characterized in that: A connecting seat (6) is installed on the steel bottom rod (1), and the connecting seat (6) includes a carrier block (601), a partition block (603) is fixedly installed in the middle of the carrier block (601), side plates (602) are fixed on both sides of the partition block (603), and slots are formed between the side plates (602), the carrier block (601) and both sides of the partition block (603).

5. The formwork device for the open arch of a steel tube concrete arch bridge with inclined piles according to claim 1, characterized in that: At least one oblique support rod (3) is arranged between the two sides of the load-bearing support rod (2) and the steel bottom rod (1), one end of the oblique support rod (3) abuts against the notch, and the other end of the oblique support rod (3) abuts against one side of the abutment rod (502) of the connecting plate (5), and a connecting piece (4) is arranged at one end of the oblique support rod (3) close to the arc steel rod (7).

6. A formwork device for an open arch of a steel tube concrete arch bridge with inclined piles according to claim 5, characterized in that: The connecting member (4) comprises a steel hoop (401) sleeved on the surface of the oblique support rod (3), the steel hoop (401) slides along the oblique support rod (3), and a welding plate (404) is fixed to one side of the steel hoop (401) close to the arc steel rod (7); A protrusion (403) is fixed on the surface of the oblique support rod (3), a threaded rod (402) is screwed into the middle of the protrusion (403), and one end of the threaded rod (402) is rotatably connected to a side of the steel hoop (401) away from the welding plate (404).

7. The formwork device for the open arch of a steel tube concrete arch bridge with inclined piles according to claim 1, characterized in that: A plurality of rib plates (701) with a thickness of ≤20 cm are fixed on a side of each of the arc steel rods (7) away from the formwork area.

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