Prestress counter-tension counter-force frame and preloading structure

Abstract

The utility model discloses a prestress counter-tension counter-force frame. Comprising an upper group of first embedded parts, a lower group of first embedded parts, a second embedded part, a triangular bracket and a plurality of jacks, wherein the upper group of first embedded parts and the lower group of first embedded parts are embedded in the inner side edge of 0 # block concrete of a main bridge box girder; the second embedded part is used for connecting and fixing the upper group of first embedded parts and the lower group of first embedded parts; the triangular bracket is fixed on the side surface of the 0 # block concrete through the two groups of first embedded parts; and the closure section stiff framework is mounted at the lower end of the jack through a steel wedge block. The utility model further discloses a preloading structure which comprises the prestress counter-tension counter-force frame, a suspended hanging basket and the like, wherein the hanging basket is fixed to one side of the upper end of the No.0 concrete block through an installation base, and the section of the hanging basket is in an isosceles triangle shape. According to the utility model, the number of operators is small, the hoisting workload is small, the installation is convenient, the pre-pressing load value is clear and controllable, and the high-altitude hoisting of stacked objects is not needed, so that the construction efficiency is improved, the construction intensity is reduced, and the construction safety is also ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering construction, in particular to a prestressed reverse tension reaction frame and a surcharge preloading structure. Background Art

[0002] In bridge and building construction, the hanging basket surcharge preloading is a commonly used construction method to simulate the actual construction load and test the bearing capacity and stability of the structure. Before using the hanging basket, it is necessary to preload the hanging basket. The traditional hanging basket preloading method is to stack the existing materials on the construction site on the hanging basket to achieve the preloading effect of the hanging basket. Since this hanging basket surcharge preloading method uses a large amount of construction materials, it is generally difficult to ensure that enough load weight materials are equipped in a short time, so the construction period is long, the workload is large, often resulting in low construction efficiency and increased costs, and there are great safety risks in hoisting a large number of surcharge objects at high altitude. Content of the Utility Model

[0003] In view of this, the utility model provides a prestressed reverse tension reaction frame and a surcharge preloading structure to shorten the construction period and reduce the construction intensity.

[0004] The utility model solves the above problems by the following technical means:

[0005] The prestressed reverse tension reaction frame of the utility model includes two groups of upper and lower first embedded parts embedded in the inner side of the concrete of the 0# block of the main bridge box girder, a second embedded part for connecting and fixing the two groups of the first embedded parts, a triangular bracket fixed on the side of the 0# block concrete through the two groups of the first embedded parts, a plurality of jacks arranged at the bottom of the triangular bracket, and a closure section stiffening skeleton installed at the lower end of the jack through a steel wedge block.

[0006] Preferably, the triangular bracket includes triangular structures fixed by the first embedded parts and having the same number as the jacks, and a connecting bottom beam arranged at the bottom of the intersection points of the plurality of triangular structures. The plurality of jacks and the plurality of triangular structures are arranged in one-to-one correspondence at the bottom of the connecting bottom beam.

[0007] Preferably, the triangular structure includes a horizontal bottom beam and a diagonal brace obliquely welded to the middle of the free end of the horizontal bottom beam. The diagonal brace and the other end of the horizontal bottom beam are respectively connected and fixed to the two groups of the first embedded parts through flange steel plates.

[0008] Preferably, the horizontal bottom beam, the diagonal brace and the connecting bottom beam are all 45b I-beams.

[0009] Preferably, the plurality of horizontal bottom beams are connected and fixed through one of the above flange steel plates, and the plurality of diagonal braces are connected and fixed through another of the above flange steel plates.

[0010] The surcharge preloading structure of the utility model includes the above-mentioned prestressed reverse tension reaction frame, a hanging basket with an isosceles triangle cross-section that is fixed to the upper end of the No. 0 block concrete through a mounting base and is suspended on one side, a support fixing block that is horizontally extended from the middle of the No. 0 block concrete to the side of the hanging basket for tightly fixing the mounting base, and a bottom support plate with one end connected to the end of the hanging basket through a steel cable and the other end fixed to the bottom of the No. 0 block concrete through a fixing connector. The steel cable passes through the support fixing block and is connected to the bottom support plate, and the stiffening skeleton of the closure section of the reaction frame is located on the bottom support plate.

[0011] Preferably, the hanging basket includes a left support and a right support that are symmetrically arranged and connected together at the upper end, an intermediate support supported at the connection of the left support and the right support, and a bottom support connecting the bottoms of the left support, the right support, and the intermediate support. The mounting base is connected and fixed to the part corresponding to the bottom support and the left support, and the part corresponding to the bottom support and the right support is suspended.

[0012] Preferably, a wooden board layer is laid on the bottom support plate, and a steel plate is laid on the wooden board layer.

[0013] Preferably, the wooden board layer is fully covered with 10cm*10cm square timbers.

[0014] As can be seen from the above technical solutions, the utility model has the following beneficial effects:

[0015] For the prestressed reverse tension reaction frame of the utility model, the second embedded part is used to pull and fix the end of the first embedded part inside the No. 0 block concrete, enhancing the fixing strength of the first embedded part, thus avoiding the situation that the first embedded part loosens or even comes out due to the force on the triangular support, and ensuring the installation stability of the triangular support; and the jack arranged at the lower end of the triangular support is used for preloading operation. Compared with the traditional preloading operation, there are fewer operators, less hoisting operation volume, convenient installation, clear and controllable preloading load value, and no need to hoist and place surcharge objects at high altitude, thereby improving the construction efficiency, reducing the construction intensity, and ensuring the construction safety.

[0016] For the surcharge preloading structure of the utility model, the hanging basket is set to a structure with an isosceles triangle cross-section and suspended on one side, having better structural stability and high safety; and the bottom is fixed doubly through the mounting base and the support fixing block, with more firm and safe installation; and it cooperates with the prestressed reverse tension reaction frame for preloading operation, ensuring the preloading effect of the hanging basket. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the prestressed reverse tension reaction frame of the utility model;

[0018] Figure 2 This is a side view of the prestressed reverse tension reaction frame of the present utility model;

[0019] Figure 3 This is a schematic structural view of the triangular support of the prestressed reverse tension reaction frame of the present utility model;

[0020] Figure 4 This is an installation schematic view of the prestressed reverse tension reaction frame of the present utility model;

[0021] Figure 5 This is a schematic structural view of the surcharge preloading structure of the present utility model.

[0022] Such as Figures 1 - 5 , No. 0 block concrete - 1, prestressed reverse tension reaction frame - 2, first embedded part - 21, second embedded part - 22, triangular support - 23, horizontal bottom beam - 231, diagonal brace - 232, connecting bottom beam - 233, flange steel plate - 24, jack - 25, steel wedge block - 26, closure segment stiffening skeleton - 27, installation base - 3, hanging basket - 4, left support - 41, right support - 42, middle support - 43, bottom support - 44, steel cable - 45, guardrail - 46, support fixing block - 5, fixed connecting piece - 6, bottom support plate - 7. Specific embodiments

[0023] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0024] The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "plurality" is two or more.

[0025] Embodiment 1

[0026] Such as Figures 1 to 4As shown in the figure: The prestressed reverse-tension reaction frame 2 described in this embodiment includes two sets of upper and lower first embedded parts 21 embedded in the inner side of the concrete of the 0# block of the main bridge box girder, a second embedded part 22 for connecting and fixing the two sets of upper and lower first embedded parts 21, a triangular bracket 23 fixed to the side of the 0# block concrete 1 through the two sets of first embedded parts 21, a plurality of jacks 25 arranged at the bottom of the triangular bracket 23, and a closure section stiffening skeleton 27 installed at the lower end of the jack 25 through a steel wedge block 26.

[0027] During specific installation, as Figure 4 shown, there are two prestressed reverse-tension reaction frames 2, which are symmetrically arranged on both sides of the 0# block concrete 1.

[0028] For the prestressed reverse-tension reaction frame 2 described in this embodiment, the second embedded part 22 is used to pull and fix the end of the first embedded part 21 inside the 0# block concrete 1, enhancing the fixing strength of the first embedded part 21, thereby avoiding the situation that the first embedded part 21 loosens or even comes out due to the force on the triangular bracket 23, and ensuring the installation stability of the triangular bracket 23; and the jack 25 arranged at the lower end of the triangular bracket 23 is used for preloading operation. Compared with the traditional preloading operation, there are fewer operators, less hoisting operation volume, convenient installation, clear and controllable preloading load value, and no need to hoist and place the surcharge in the air, thus improving the construction efficiency, reducing the construction intensity, and ensuring the construction safety.

[0029] As a preferred implementation manner of this embodiment, as Figure 3 shown, the triangular bracket 23 includes triangular structures fixed through the first embedded part 21 and having the same number as the jacks 25, and a connecting bottom beam 233 arranged at the bottom of the intersection points of the plurality of triangular structures. Specifically, the triangular structure includes a horizontal bottom beam 231 made of 45b I-beam and a diagonal brace 232 obliquely welded to the free end of the horizontal bottom beam 231 near the middle. The plurality of jacks 25 are arranged corresponding to the plurality of triangular structures at the bottom of the connecting bottom beam 233. Thus, when the jack 25 reacts on the connecting bottom beam 233, the acting force will be dispersed and resisted through the triangular structure, avoiding the situation that the connecting bottom beam 233 deforms due to the force, thereby ensuring the preloading effect. And the other ends of the diagonal brace 232 and the horizontal bottom beam 231 are respectively connected and fixed to the upper and lower two sets of first embedded parts 21 through flange steel plates 24, dispersing the concentrated stress at the ends of the diagonal brace 232 and the horizontal bottom beam 231 to the surrounding 0# block concrete 1 through the flange steel plates 24, avoiding the situation that the connection part is easily damaged under the action of a large force, and prolonging the service life.

[0030] As a preferred implementation manner of this embodiment, as Figure 2As shown, multiple horizontal bottom beams 231 are connected and fixed by one of the above flange steel plates 24, and multiple diagonal braces 232 are connected and fixed by another of the above flange steel plates 24, further improving the connection strength and protecting the concrete 1 of block 0 at the connection, making it not easily damaged.

[0031] Embodiment 2

[0032] As Figure 5 shown: The surcharge preloading structure described in this embodiment includes the above prestressed reverse tension reaction frame 2, a hanging basket 4 with an isosceles triangle cross-section that is suspended on one side and fixed to the upper end of the concrete 1 of block 0 through a mounting base 3, a support fixing block 5 horizontally extending from the middle of the concrete 1 of block 0 towards the hanging basket 4 side for tightly fixing the mounting base 3, and a bottom support plate 7 with one end connected to the end of the hanging basket 4 through a steel cable 45 and the other end fixed to the bottom of the concrete 1 of block 0 through a fixing connector 6. The steel cable 45 passes through the support fixing block 5 and is connected to the bottom support plate 7, and the closure section stiffening skeleton 27 of the reaction frame is located on the bottom support plate 7.

[0033] In the surcharge preloading structure described in this embodiment, the hanging basket 4 is set to have an isosceles triangle structure with one side suspended, which has better structural stability and high safety; and the bottom is double-fixed by the mounting base 3 and the support fixing block 5, making the installation more firm and safe; and it cooperates with the prestressed reverse tension reaction frame 2 for preloading operation, ensuring the preloading effect of the hanging basket 4.

[0034] As a preferred implementation manner of this embodiment, the hanging basket 4 includes a left support 41 and a right support that are symmetrically arranged and connected together at the upper end, an intermediate support 43 supported at the connection of the left support 41 and the right support, and a bottom support 44 connecting the bottoms of the left support 41, the right support, and the intermediate support 43. The mounting base 3 connects and fixes the part of the bottom support 44 corresponding to the left support 41, and the part of the bottom support 44 corresponding to the right support is suspended.

[0035] For ease of use, as a preferred implementation manner of this embodiment, a wooden board layer (not shown in the figure) made of 10 cm * 10 cm square timbers is fully paved on the bottom support plate 7, and a steel plate (not shown in the figure) is paved on the wooden board layer, thereby providing protective buffering for the bottom support plate 7 and extending its service life.

[0036] As a preferred implementation manner of this embodiment, protective fences 46 are provided around the bottom support 44, enhancing construction safety.

[0037] 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 them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A prestressed anti-tensioning reaction frame, characterized in that: It includes two upper and lower groups of first embedded parts embedded in the inner side of the concrete of block No. 0 of the main bridge box girder, and second embedded parts for connecting and fixing the two upper and lower groups of the first embedded parts, a triangular bracket fixed to the side of the concrete block No. 0 through the two groups of the first embedded parts, a plurality of jacks arranged at the bottom of the triangular bracket, and a closing section rigid frame installed at the lower end of the jack through a steel wedge block.

2. A prestressed anti-tensioning reaction frame according to claim 1, characterized in that: The triangular bracket includes triangular structures fixed by the first embedded parts and having the same number as the jacks, and a connecting bottom beam arranged at the bottom of the intersection of the multiple triangular structures. The multiple jacks and the multiple triangular structures are arranged at the bottom of the connecting bottom beam in a one-to-one correspondence.

3. A prestressed anti-tensioning reaction frame according to claim 2, characterized in that: The triangular structure includes a horizontal bottom beam and a diagonal brace obliquely welded to the free end of the horizontal bottom beam near the middle. The diagonal brace and the other end of the horizontal bottom beam are respectively connected and fixed to the upper and lower groups of the first embedded parts through flange steel plates.

4. A prestressed anti-tensioning reaction frame according to claim 3, characterized in that: The horizontal bottom beam, the diagonal brace and the connecting bottom beam are all 45b I-beams.

5. The prestressed anti-tensioning reaction frame according to claim 3 is characterized in that: The plurality of horizontal bottom beams are connected and fixed via one of the flange steel plates, and the plurality of diagonal braces are connected and fixed via another of the flange steel plates.

6. A preloading structure, characterized in that: It comprises the prestressed counter-tensioning reaction frame as claimed in any one of claims 1 to 5, a hanging basket with an isosceles triangle cross-section and suspended on one side of the upper end of the No. 0 concrete block through a mounting base, a supporting fixing block provided in the middle of the No. 0 concrete block and extending horizontally toward the hanging basket side for tightening and fixing the mounting base, a bottom support plate having one end connected to the end of the hanging basket through a steel cable and the other end fixed to the bottom of the No. 0 concrete block through a fixed connector, the steel cable passing through the supporting fixing block and connected to the bottom support plate, and the closed section rigid frame of the reaction frame is located on the bottom support plate.

7. The preloading structure according to claim 6, characterized in that: The hanging basket includes a left bracket and a right bracket connected together at the upper ends and symmetrically arranged, an intermediate bracket supported at the connection between the left bracket and the right bracket, and a bottom bracket connecting the left bracket, the right bracket and the bottom of the intermediate bracket, the mounting base connects and fixes the part of the bottom bracket corresponding to the left bracket, and the part of the bottom bracket corresponding to the right bracket is suspended.

8. The preloading structure according to claim 6, characterized in that: A wooden board layer is laid on the bottom support plate, and a steel plate is laid on the wooden board layer.

9. The preloading structure according to claim 8, characterized in that: The wooden board layer is formed by fully paving 10cm*10cm square wood.

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