Temporary support for steel box girder incremental launching construction

Abstract

The utility model relates to the technical field of construction supports, and discloses a temporary support for steel box girder incremental launching construction, which comprises two groups of steel pipe columns, each group of steel pipe columns comprises two steel pipe columns, the two groups of steel pipe columns are distributed in bilateral symmetry, and the outer side of the top end of each group of steel pipe columns is connected with a cross rod. Through cooperation of the positioning forks, the supporting plates and the iron chains, pulling and supporting force is conveniently provided for the two sides of the steel pipe column, lateral thrust borne by the top end of the steel pipe column in the pushing process of the steel box girder is conveniently resisted, and therefore stable supporting of the steel pipe column is guaranteed, the steel pipe column is prevented from toppling over, and the anti-loosening mechanism is used for preventing the steel pipe column from loosening. And by means of the interception effect of the fixed rod on the anti-loosening plate, the rotating rod is prevented from rotating reversely under the action of the pulling force of the steel pipe column, so that the iron chain is prevented from loosening in the pulling and supporting process, and the supporting stability of the steel pipe column is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of construction supports, in particular to a temporary support for jacking construction of steel box beams. Background Art

[0002] During the jacking process, the steel box girder needs to pass through temporary piers and permanent piers (i.e. temporary supports and permanent supports). Since it is difficult to control the settlement difference between adjacent positions during this process, and since the stiffness of temporary supports and permanent supports are different, the deformation under the action of the concrete beam's deadweight is also different. Therefore, when setting up the supports, the deformation of the supports after loading must be fully considered, and the pre-throw value of elevation control and pre-loading and pre-compression before construction must be done well.

[0003] Chinese Patent Authorization Publication No. CN 215629445 U discloses a temporary support for steel box girder construction, comprising a plurality of support units, any two of which are detachably connected, each of which comprises a plurality of support rods, a reinforcement assembly being provided between any two adjacent support rods, a through slot being provided within each of which, in turn, a mounting assembly for alignment and installation is provided within each of the through slots. This utility model addresses the problem of existing temporary supports requiring installation workers to perform alignment and installation during assembly, significantly increasing their workload. The aforementioned prior art solutions have the following deficiencies: Because the support utilizes a multi-segment splicing method, its overall structural strength is limited. In addition to bearing the weight of the steel box girder, the temporary support also needs to withstand lateral frictional resistance during the jacking process. Because the support lacks other supporting components, its stability is limited, leaving room for improvement. Utility Model Content

[0004] The purpose of the utility model is to provide a temporary support for steel box girder jacking construction, so as to solve the problem of general support strength in the jacking direction of the existing temporary support for steel box girder jacking construction proposed in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a temporary support for the jacking construction of a steel box girder, comprising a steel pipe column, wherein the steel pipe column is provided in two groups, and each group of steel pipe columns is provided with two steel pipe columns, and the two groups of steel pipe columns are symmetrically distributed on the left and right sides, and the outer sides of the top ends of the steel pipe columns of each group are connected with a cross bar, and three reinforcing rods are welded between the two steel pipe columns below the cross bar, and the top ends of the left and right cross bars are connected with a connecting rod, and the three reinforcing rods are welded at the top and form a triangular structure, and locking mechanisms are installed on both sides of each group of steel pipe columns, and the locking mechanisms include fixed rods inserted in the soil. The top of the positioning fork is provided with a support plate, and the top of the support plate is rotatably connected to a rotating rod, and a handle is installed on the top of the rotating rod, and an iron chain is welded to the bottom end of one side of the rotating rod, and one end of the iron chain is welded to one side of the steel pipe column. The locking mechanism is provided with two groups, and each group of locking mechanisms is provided with four. The connecting line between each group of the locking mechanisms is parallel to the direction of the cross bar. Two side rods arranged in parallel up and down are installed between the two groups of steel pipe columns, and side oblique rods are installed on both sides of one end of the upper side rod, and one end of the side oblique rods is connected to the inner side of the steel pipe column on the other side.

[0006] Preferably, two groups of the side diagonal rods are provided, and each group of the side diagonal rods is provided with two side diagonal rods, the two side diagonal rods are distributed in a V shape, and a triangular structure is formed between the side diagonal rods, the side rods and the steel pipe column.

[0007] Preferably, two groups of reinforcing rods are provided, and each group is provided with three reinforcing rods, and the vertex of the triangular structure formed by each group of reinforcing rods is located directly below the connecting rod.

[0008] Preferably, an anti-loosening mechanism is connected between the rotating rod and the support plate, and the anti-loosening mechanism includes a movable sleeve arranged on the outside of the rotating rod, and an anti-loosening plate is welded on one side of the movable sleeve, and a fixing rod is evenly welded on the outer edge of the top of the support plate, and one side of the anti-loosening plate is against one side of the fixed rod.

[0009] Preferably, six fixed rods are provided, and the six fixed rods are distributed in a ring shape with equal intervals on the support plate. The movable sleeve is located above the iron chain, and the movable sleeve and the rotating rod form an up and down sliding structure.

[0010] Preferably, a cross reinforcement rib is welded inside the steel pipe column, and the length of the cross reinforcement rib is adapted to the length of the steel pipe column.

[0011] Preferably, reinforcing steel bars are uniformly welded on the inner side of the bottom end of the steel pipe column, and the bottom end of the reinforcing steel bars is inserted into the concrete foundation pit in the soil, and two positioning hoops distributed up and down are welded on the inner side of multiple reinforcing steel bars.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] (1) By cooperating with the positioning fork, the support plate and the iron chain, a tensile force is provided to both sides of the steel pipe column to resist the lateral thrust received by the top of the steel pipe column during the jacking process of the steel box girder, thereby ensuring the stable support of the steel pipe column and preventing it from falling. In addition, the anti-loosening mechanism is used and the fixing rod intercepts the anti-loosening plate to prevent the rotating rod from rotating in the opposite direction under the pulling force of the steel pipe column, thereby preventing the iron chain from loosening during the tensile process and further improving the support stability of the steel pipe column.

[0014] (2) The cross-reinforcement ribs are used to improve the internal structural strength of the steel pipe column, and the reinforcement steel bars are used to improve the connection strength between the steel pipe column and the ground during installation. In addition, with the cooperation of the positioning hoop, the position stability between the multiple reinforcement steel bars is further ensured, and the possibility of bending of the reinforcement steel bars is reduced, thereby ensuring the stable installation of the steel pipe column. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0017] Figure 2 This is a side structural diagram of the present utility model;

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of the steel pipe column of the present utility model;

[0019] Figure 4 This is a schematic diagram of the three-dimensional structure of the support plate of the present utility model;

[0020] Figure 5 This is a schematic diagram of the three-dimensional structure of the positioning fork of the present utility model.

[0021] Explanation of the reference numerals in the figure: 1. Steel pipe column; 2. Cross bar; 3. Reinforcement bar; 4. Iron chain; 5. Support plate; 6. Positioning fork; 7. Fixed rod; 8. Rotating rod; 9. Handle; 10. Side rod; 11. Side diagonal rod; 12. Cross reinforcement rib; 13. Reinforcement steel bar; 14. Positioning hoop; 15. Movable sleeve; 16. Anti-loosening plate; 17. Connecting rod. DETAILED DESCRIPTION

[0022] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-Figure 5 , an embodiment provided by the utility model: a temporary support for steel box girder jacking construction, comprising a steel pipe column 1;

[0024] A cross reinforcement rib 12 is welded inside the steel pipe column 1, and the length of the cross reinforcement rib 12 is adapted to the length of the steel pipe column 1;

[0025] The inner side of the bottom end of the steel pipe column 1 is evenly welded with reinforcing steel bars 13, and the bottom end of the reinforcing steel bars 13 is inserted into the concrete foundation pit in the soil. Two positioning hoops 14 distributed up and down are welded to the inner side of the multiple reinforcing steel bars 13;

[0026] Specifically, such as Figure 1 、 Figure 3 As shown, when in use, the cross reinforcement ribs 12 are used to improve the longitudinal structural strength, and the reinforcement steel bars 13 and the positioning hoop 14 are used to improve the connection strength between the steel pipe column 1 and the ground, thereby improving the installation stability of the steel pipe column 1;

[0027] There are two groups of steel pipe columns 1, and each group is provided with two steel pipe columns 1. The two groups of steel pipe columns 1 are symmetrically distributed. The outer side of the top of each group of steel pipe columns 1 is connected to a cross bar 2, and three reinforcement rods 3 are welded between the two steel pipe columns 1 below the cross bar 2.

[0028] There are two groups of reinforcing rods 3, and each group of reinforcing rods 3 is provided with three reinforcing rods 3. The vertex of the triangular structure formed by each group of reinforcing rods 3 is located directly below the connecting rod 17;

[0029] Specifically, such as Figure 1 As shown, when in use, the cross bar 2 and the left and right reinforcing bars 3 are used to improve the connection strength between the two steel pipe columns 1, and the triangular structure is used to improve its stability;

[0030] At the same time, the top ends of the left and right cross bars 2 are connected with connecting rods 17, and the first ends of the three reinforcing rods 3 are welded to form a triangular structure. A locking mechanism is installed on both sides of each set of steel pipe columns 1, and the locking mechanism includes a positioning fork 6 inserted into the soil, and a support plate 5 is installed on the top end of the positioning fork 6. The top end of the support plate 5 is rotatably connected to a rotating rod 8, and a handle 9 is installed on the top end of the rotating rod 8. The bottom end of one side of the rotating rod 8 is welded with an iron chain 4, and one end of the iron chain 4 is welded to one side of the steel pipe column 1;

[0031] An anti-loosening mechanism is connected between the rotating rod 8 and the support plate 5, and the anti-loosening mechanism includes a movable sleeve 15 sleeved on the outside of the rotating rod 8, and an anti-loosening plate 16 is welded to one side of the movable sleeve 15. The outer edge of the top of the support plate 5 is evenly welded with the fixed rod 7, and one side of the anti-loosening plate 16 abuts against one side of the fixed rod 7;

[0032] There are six fixed rods 7, and the six fixed rods 7 are distributed in an annular shape with equal intervals on the support plate 5. The movable sleeve 15 is above the iron chain 4, and the movable sleeve 15 and the rotating rod 8 form an up and down sliding structure;

[0033] Specifically, such as Figure 1 、 Figure 4 and Figure 5 As shown, when in use, the positioning fork 6 is used to ensure the stability of the support plate 5, and the iron chain 4 is used to generate tension on both sides of the steel pipe column 1, thereby preventing the steel pipe column 1 from tilting laterally during the jacking process of the steel box girder, ensuring its stability, and the anti-loosening structure is used to further lock the iron chain 4 to prevent the iron chain 4 from loosening;

[0034] There are two groups of locking mechanisms, and each group has four locking mechanisms. The direction of the connection between each group of locking mechanisms is parallel to the direction of the crossbar 2. Two side bars 10 arranged in parallel up and down are installed between the two groups of steel pipe columns 1, and side diagonal bars 11 are installed on both sides of one end of the upper side bar 10. One end of the side diagonal bar 11 is connected to the inner side of the other side steel pipe column 1;

[0035] There are two groups of side diagonal rods 11, and each group of side diagonal rods 11 is provided with two side diagonal rods 11. The two side diagonal rods 11 are distributed in a V shape, and a triangular structure is formed between the side diagonal rods 11, the side rods 10 and the steel pipe column 1;

[0036] Specifically, such as Figure 2 As shown, when in use, the side diagonal rods 11 and the side rods 10 act to improve the connection strength between the left and right steel pipe columns 1.

[0037] Working Principle: When using the present invention, first, a foundation pit is opened at a preset position and poured with concrete. The reinforcing steel bars 13 and the positioning hoop 14 are inserted into the concrete, so that the steel pipe column 1 is set on the ground. The cross bars 2 and the reinforcing bars 3 are welded between the adjacent steel pipe columns 1 on the same side. The side bars 10, the side diagonal bars 11 and the connecting bars 17 are installed at corresponding positions between the steel pipe columns 1 on the left and right sides. The triangular structure formed by the above structure is used to improve the support stability of the steel pipe column 1.

[0038] Secondly, insert the positioning forks 6 on both sides of the steel pipe column 1 into the soil parallel to the direction of the cross bar 2, so that the bottom end of the support plate 5 is against the ground, and then use the handle 9 to drive the rotating rod 8 to rotate, so that the rotating rod 8 tightens the iron chain 4, so that the iron chain 4 supports the steel pipe column 1, and then slide the movable sleeve 15 downward along the rotating rod 8 so that 16 is between the two adjacent fixed rods 7, and use the fixed rod 7 to intercept the anti-loosening plate 16, so as to prevent the rotating rod 8 from rotating in the opposite direction, and then avoid the loosening of the iron chain 4, so as to ensure the stability of the steel pipe column 1 during the jacking process of the steel box girder.

[0039] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0040] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0041] Finally, it should be noted that the above 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 with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A temporary support for steel box girder jacking construction, comprising a steel pipe column (1), wherein the steel pipe column (1) is provided in two groups, and each group of steel pipe columns (1) is provided with two, and the two groups of steel pipe columns (1) are symmetrically distributed, characterized in that: The outer side of the top of each group of steel pipe columns (1) is connected to a cross bar (2), and three reinforcing bars (3) are welded between the two steel pipe columns (1) below the cross bar (2). At the same time, the tops of the left and right cross bars (2) are connected to a connecting rod (17). The three reinforcing bars (3) are welded at the first position and form a triangular structure. A locking mechanism is installed on both sides of each group of steel pipe columns (1), and the locking mechanism includes a positioning fork (6) inserted into the soil. A support plate (5) is installed at the top of the positioning fork (6), and a rotating rod (8) is rotatably connected to the top of the support plate (5). The rotating rod (8) ) is provided with a handle (9) at the top end, an iron chain (4) is welded to the bottom end of one side of the rotating rod (8), and one end of the iron chain (4) is welded to one side of the steel pipe column (1), two groups of locking mechanisms are provided, and each group of locking mechanisms is provided with four locking mechanisms, and the connecting line between each group of locking mechanisms is parallel to the direction of the cross bar (2), and two side rods (10) arranged in parallel up and down are installed between the two groups of steel pipe columns (1), and side inclined rods (11) are installed on both sides of one end of the upper side rod (10), and one end of each side inclined rod (11) is connected to the inner side of the other side steel pipe column (1).

2. A temporary support for steel box girder jacking construction according to claim 1, characterized in that: Two groups of the side diagonal rods (11) are provided, and each group of the side diagonal rods (11) is provided with two side diagonal rods (11), the two side diagonal rods (11) are distributed in a V shape, and a triangular structure is formed between the side diagonal rods (11), the side rods (10) and the steel pipe column (1).

3. A temporary support for top-pushing construction of a steel box girder according to claim 1, characterized in that: Two groups of reinforcing rods (3) are provided, and each group of reinforcing rods (3) is provided with three reinforcing rods, and the vertex of the triangular structure formed by each group of reinforcing rods (3) is located directly below the connecting rod (17).

4. A temporary support for top-pushing construction of a steel box girder according to claim 1, characterized in that: An anti-loosening mechanism is connected between the rotating rod (8) and the support plate (5), and the anti-loosening mechanism comprises a movable sleeve (15) sleeved on the outside of the rotating rod (8), and an anti-loosening plate (16) is welded to one side of the movable sleeve (15), and a fixing rod (7) is evenly welded to the outer edge of the top end of the support plate (5), and one side of the anti-loosening plate (16) abuts against one side of the fixing rod (7).

5. A temporary support for top-pushing construction of a steel box girder according to claim 4, characterized in that: Six fixed rods (7) are provided, and the six fixed rods (7) are distributed in a ring shape at equal intervals on the support plate (5); the movable sleeve (15) is located above the iron chain (4); and the movable sleeve (15) and the rotating rod (8) form an up-and-down sliding structure.

6. A temporary support for top-pushing construction of a steel box girder according to claim 1, characterized in that: A cross reinforcement rib (12) is welded inside the steel pipe column (1), and the length of the cross reinforcement rib (12) matches the length of the steel pipe column (1).

7. A temporary support for top-pushing construction of a steel box girder according to claim 1, characterized in that: Reinforcing steel bars (13) are uniformly welded to the inner side of the bottom end of the steel pipe column (1), and the bottom end of the reinforcing steel bars (13) is inserted into a concrete foundation pit in the soil. Two positioning hoops (14) distributed up and down are welded to the inner side of a plurality of the reinforcing steel bars (13).

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