Hanging basket pre-pressing device

Abstract

The utility model relates to the technical field of beam bridge construction, in particular to a hanging basket pre-pressing device which is used for continuous beam bridge construction and comprises a counter-force frame, a connecting mechanism and a pre-pressing mechanism. A preformed hole is formed in a truss used during construction of a continuous beam bridge, the counter-force frame is installed on the truss corresponding to the preformed hole through the connecting mechanism, a bottom die is arranged between adjacent hanging baskets at the bottom end of the truss, and the pre-pressing mechanism is arranged between the counter-force frame and the bottom die. In addition, the pre-pressing mechanism acts on the reaction frame, and the hanging basket elastically deforms under the reaction force of the reaction frame. The hanging basket pre-pressing device can avoid unbalance loading, overload and other risks in the pre-pressing process, meanwhile, the hanging basket pre-pressing device is not limited by sites and heights, and the hanging basket pre-pressing construction safety can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of beam bridge construction, in particular to a hanging basket preloading device. Background Art

[0002] During the construction of a continuous beam bridge hanging basket, in order to stabilize the hanging basket and ensure operation safety, a certain preload weight needs to be applied to the beam body. The size of the preload weight directly affects the stability and operation efficiency of the hanging basket.

[0003] At present, the preloading of continuous beam bridge hanging basket construction mostly adopts surcharge preloading and pre-embedded pedestal counter-tension preloading. The use of surcharge preloading will be subject to site restrictions. For large-span construction, the mass of the blocks is large, and the surcharge preloading height is high. At the same time, the surcharge preloading will be affected by the rainy season, which will lead to risks such as eccentric loading and overloading, and the construction risk is relatively high. The use of pre-embedded pedestal counter-tension preloading will be subject to height restrictions. When the pier is high, the fine-rolled thread counter-tension is longer, the construction cost is high, the construction period is long, and the construction risk is relatively high. Utility Model Content

[0004] (1) The utility model provides a hanging basket preloading device, which alleviates the technical problems in the prior art of continuous beam bridge hanging basket construction preloading being subject to site and height restrictions and high construction risks.

[0005] (2) Technical solution

[0006] In order to solve the above technical problems, the embodiment of the utility model provides a hanging basket preloading device for continuous beam bridge construction, comprising a reaction frame, a connecting mechanism and a preloading mechanism;

[0007] A reserved hole is provided on the truss used in the construction of the continuous beam bridge, the reaction frame is installed on the truss corresponding to the reserved hole through the connecting mechanism, a bottom form is provided between the adjacent hanging baskets at the bottom end of the truss, and the preloading mechanism is provided between the reaction frame and the bottom form;

[0008] Furthermore, the pre-compression mechanism acts on the reaction frame, and the hanging basket is elastically deformed by the reaction force of the reaction frame.

[0009] Furthermore, the connecting mechanism includes a connecting corbel and a connecting pin, the connecting corbel is arranged on the top of the reaction frame, and the connecting corbel is detachably mounted on the reserved hole through the connecting pin.

[0010] Furthermore, the connecting mechanism also includes a filling block, which is arranged between the connecting corbel and the truss.

[0011] Furthermore, a connecting hole is provided on the connecting corbel, and the connecting pin passes through the connecting hole and the reserved hole in sequence and is then fixed by a pin sleeve.

[0012] Furthermore, a precision-rolled bolt is provided at one end of the reaction frame away from the connecting corbel, and the precision-rolled bolt is pre-embedded in the truss for fixing the reaction frame.

[0013] Furthermore, a distribution beam is sleeved on one end of the finish-rolled bolt facing the reaction frame.

[0014] Furthermore, the pre-pressing mechanism includes a jack, the output end of the jack is connected to the bottom wall of the reaction frame, and the bottom wall of the jack is connected to the bottom mold.

[0015] Furthermore, the pre-pressing mechanism also includes a load-bearing beam, which is arranged between the bottom of the jack and the bottom mold.

[0016] Furthermore, the hanging basket preloading device also includes a measuring instrument, which is arranged on a fixed surface and is used to measure the deformation parameters of the reaction frame.

[0017] Furthermore, the reaction frame is in the shape of a right triangle, with one right-angled side being in contact with the truss and the other right-angled side being connected to the pre-stressing mechanism.

[0018] Beneficial effects of the utility model:

[0019] The utility model provides a hanging basket prestressing device for continuous beam bridge construction, which includes a reaction frame, a connecting mechanism and a prestressing mechanism. The reaction frame cooperates with the prestressing mechanism to make the force more balanced, and the precise elastic deformation and force parameters of the hanging basket are obtained, which can provide a basis for the hanging basket construction of the continuous beam bridge. The reaction frame is installed in correspondence with the reserved holes on the truss through the connecting structure provided at its top, which is simple and convenient. The prestressing mechanism is provided between the reaction frame and the bottom formwork, which can avoid risks such as unbalanced loading and overloading during prestressing, and will not be restricted by the site and height, and can effectively improve the safety of the hanging basket prestressing construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A schematic diagram of a preloading device for a hanging basket provided in an embodiment of the utility model;

[0022] Figure 2 A structural diagram of a reaction frame of a hanging basket preloading device provided in an embodiment of the utility model.

[0023] icon:

[0024] 100-reaction frame;

[0025] 200-truss; 201-hanging basket; 202-bottom mold; 203-finishing bolts; 204-distribution beam; 205-front boom;

[0026] 300-connecting corbel;

[0027] 400-Jack; 401-Load-bearing beam. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] In the description of this utility model, it should be noted that the terms "upper" and "lower" and other terms indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or a connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0031] like Figures 1 to 2As shown, the utility model provides a hanging basket prestressing device for continuous beam bridge construction, comprising a reaction frame 100, a connecting mechanism and a prestressing mechanism; a reserved hole is provided on the truss 200 used in the construction of the continuous beam bridge, and the reaction frame 100 is installed on the truss 200 corresponding to the reserved hole through the connecting mechanism, and a bottom mold 202 is provided between the hanging baskets 201 adjacent to the bottom end of the truss 200, and the prestressing mechanism is provided between the reaction frame 100 and the bottom mold 202; and, the prestressing mechanism acts on the reaction frame 100, and the hanging basket 201 is elastically deformed by the reaction force of the reaction frame 100.

[0032] In this embodiment, the hanging basket prestressing device is used for the construction of continuous beam bridges, and includes a reaction frame 100, a connecting mechanism and a prestressing mechanism. The reaction frame 100 cooperates with the prestressing mechanism to make the force more balanced, and the precise elastic deformation and force parameters of the hanging basket 201 are obtained, which can provide a basis for the construction of the hanging basket 201 of the continuous beam bridge. The reaction frame 100 is installed corresponding to the reserved holes on the truss 200 through the connecting structure provided at its top, which is simple and convenient. The prestressing mechanism is provided between the reaction frame 100 and the bottom formwork 202, which can avoid risks such as unbalanced loading and overloading during prestressing, and will not be restricted by the site or height, which can effectively improve the safety of the prestressing construction of the hanging basket 201.

[0033] According to an embodiment provided by the present utility model, Figure 1 As shown, the connecting mechanism includes a connecting bracket 300 and a connecting pin. The connecting bracket 300 is provided on the top of the reaction frame 100. The connecting bracket 300 is detachably mounted on the reserved hole through the connecting pin.

[0034] In this embodiment, the connecting mechanism includes a connecting bracket 300 and a connecting pin. The connecting bracket 300 is fixed to the top of the reaction frame 100. According to an embodiment provided by the present invention, Figure 1 As shown, a connecting hole matching the connecting pin is provided on the connecting bracket 300. During installation, the connecting pin is used to pass through the connecting hole on the connecting bracket 300 and the reserved hole on the truss 200 in sequence, and then the reaction frame 100 is fixed to the truss 200 through the pin sleeve on the other side of the truss 200. The reaction frame 100 can be quickly disassembled and reused after pre-stressing, thereby increasing the overall reusability of the device.

[0035] Among them, optionally, the connecting pin is made of steel, which can increase wear resistance, improve reuse rate, and ensure service life. It can also be made of other wear-resistant materials, such as iron, aluminum, etc. Its purpose does not deviate from the design concept of this utility model and should belong to the protection scope of this utility model.

[0036] According to an embodiment provided by the present utility model, Figure 1As shown, the connection mechanism further includes a filling block, which is provided between the connecting corbel 300 and the truss 200 .

[0037] In this embodiment, the connection structure further includes a filling block, which is inserted into the gap between the connecting corbel 300 and the truss 200, so that the connecting corbel 300 and the truss 200 can be firmly connected and will not shake during the pre-stressing process and affect the measurement results.

[0038] Among them, preferably, the filling block is set as a wedge-shaped block, which is convenient for fitting into the connecting corbel 300 and the truss 200, and the wedge-shaped block is made of wood, and can also be made of steel or other materials. Its purpose does not deviate from the design concept of the present invention and should belong to the protection scope of the present invention.

[0039] According to an embodiment provided by the present utility model, Figure 1 As shown, a finishing bolt 203 is provided at one end of the reaction frame 100 away from the connecting corbel 300 . The finishing bolt 203 is pre-embedded in the truss 200 for fixing the reaction frame 100 .

[0040] In this embodiment, after the hanging basket 201 is assembled, the top pipe of the reaction frame 100 is quickly installed in the web of the truss 200 through the connecting corbel 300, and the other end of the reaction frame 100 is fixed to the bottom plate of the truss 200 using the precision-rolled bolts 203 embedded in the truss 200. Preferably, the precision-rolled bolts 203 are provided with a distribution beam 204 at one end facing the reaction frame 100 to facilitate fixing the reaction frame 100 and achieve the pressure distribution effect.

[0041] Preferably, two finishing bolts 203 are provided and arranged along the extension direction of the reaction frame 100 .

[0042] According to an embodiment provided by the present utility model, Figure 1 As shown, the pre-pressing mechanism includes a jack 400 , the output end of the jack 400 is connected to the bottom wall of the reaction frame 100 , and the bottom wall of the jack 400 is connected to the bottom mold 202 .

[0043] In this embodiment, the prestressing mechanism includes a jack 400. By arranging two sets of jacks 400 between the bottom mold 202 of the hanging basket 201 and the bottom end of the reaction frame 100, the oil gauge of the jack 400 is controlled to perform graded loading and unloading of the hanging basket 201 according to the designed prestressing load, and at the same time, the elastic deformation of the hanging basket 201 is measured, thereby providing a construction basis for the construction of the hanging basket 201.

[0044] The acceptance principle is to press down the bottom formwork 202 of the hanging basket 201 through the jack 400, and at the same time transmit the pressure to the hanging basket 201 truss 200 through the front suspension rod 205 connected to the hanging basket 201, so as to simulate the stress condition of the hanging basket 201, and measure the deformation parameters of each part and component of the hanging basket 201, eliminate the gap deformation between the rear anchor rod plug-in of the hanging basket 201 and the supporting beam, and reduce the elastic deformation of the anchor rod, and at the same time verify the safety performance of the hanging basket 201, so as to achieve the pre-stressing effect of the hanging basket 201.

[0045] Gradual preloading allows for controlled loading speed, facilitating observation of how the basket 201's deformation changes with load. This also enhances the safety of preloading the basket 201 and improves the safety of the basket preloading device. Prior to preloading, a test pressure is performed to eliminate inelastic deformation of the basket 201. After unloading, a second preloading test is performed, with the basket 201 loaded and unloaded.

[0046] According to an embodiment provided by the present utility model, Figure 1 As shown, the pre-pressing mechanism further includes a load-bearing beam 401 , and the load-bearing beam 401 is disposed between the bottom of the jack 400 and the bottom mold 202 .

[0047] In this embodiment, the prestressing mechanism also includes a load-bearing beam 401, which is arranged between the bottom of the jack 400 and the crossbeam of the bottom mold 202. Preferably, a plurality of load-bearing beams 401 are provided, which are evenly spaced apart. The stability and safety of the prestressing process are improved by setting the load-bearing beams 401.

[0048] According to an embodiment provided by the present utility model, Figure 1 As shown, the hanging basket preloading device also includes a measuring instrument, which is arranged on a fixed surface and is used to measure the deformation parameters of the reaction frame 100.

[0049] In this embodiment, the hanging basket preloading device also includes a measuring instrument. After the reaction frame 100 is installed, the instrument and scale of the measuring instrument are installed on the fixed surface. At the same time, preparations such as the measuring instrument, meter and recording form are made to provide a guarantee for subsequent parameter measurement.

[0050] The deformation parameters of the hanging basket 201 that need to be measured mainly include the settlement of the front and rear support points of the main truss, and the deformation deflection of the front hanging point; the elongation of the front suspension rod 205; the elevation measurement of the top surface measuring point of the front lower crossbeam of the hanging basket 201; the observation of the forward displacement of the main truss of the hanging basket 201, etc. Before measurement, the measuring instrument must be calibrated before it can be put into use.

[0051] Among them, preferably, the measuring instrument is a level, a total station, a steel ruler, etc., and other instruments capable of measuring deformation parameters can also be selected. Their purpose does not deviate from the design concept of the present utility model and should belong to the protection scope of this utility model.

[0052] According to an embodiment provided by the present utility model, Figure 1 As shown, the reaction frame 100 is in the shape of a right triangle, with one right-angled side being in contact with the truss 200 and the other right-angled side being connected to the pre-stressing mechanism.

[0053] In this embodiment, the reaction frame 100 is in the shape of a right triangle and is made of welded steel sections. The right triangle has good stability and can fully ensure the stability of the prestressing process. In addition, one right-angled side of the reaction frame 100 is in contact with the truss 200, and the other right-angled side is connected to the prestressing mechanism. The bottom mold 202 is pressed down by the prestressing mechanism and then transmitted to the truss 200 through the hanger connected to the hanging basket 201. It can simulate the stress condition of the hanging basket 201 and facilitate the measurement of the deformation parameters of the hanging basket 201.

[0054] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hanging basket preloading device for continuous beam bridge construction, characterized in that: It comprises a reaction frame (100), a connecting mechanism and a pre-pressing mechanism; A reserved hole is provided on a truss (200) used in the construction of a continuous beam bridge, the reaction frame (100) is installed on the truss (200) corresponding to the reserved hole through the connection mechanism, a bottom mold (202) is provided between adjacent hanging baskets (201) at the bottom end of the truss (200), and the pre-pressing mechanism is provided between the reaction frame (100) and the bottom mold (202); Furthermore, the pre-compression mechanism acts on the reaction frame (100), and the hanging basket (201) is elastically deformed by the reaction force of the reaction frame (100).

2. The hanging basket preloading device according to claim 1, characterized in that: The connecting mechanism comprises a connecting bracket (300) and a connecting pin. The connecting bracket (300) is arranged on the top of the reaction frame (100). The connecting bracket (300) is detachably mounted on the reserved hole through the connecting pin.

3. The hanging basket preloading device according to claim 2, characterized in that: The connection mechanism further comprises a filling block, wherein the filling block is arranged between the connecting corbel (300) and the truss (200).

4. The hanging basket preloading device according to claim 2, characterized in that: The connecting bracket (300) is provided with a connecting hole, and the connecting pin passes through the connecting hole and the reserved hole in sequence and is then fixed by a pin sleeve.

5. The hanging basket preloading device according to claim 2, characterized in that: One end of the reaction frame (100) away from the connecting bracket (300) is provided with a finishing bolt (203), and the finishing bolt (203) is pre-buried in the truss (200) and is used to fix the reaction frame (100).

6. The hanging basket preloading device according to claim 5, characterized in that: A distribution beam (204) is sleeved on one end of the finish-rolled bolt (203) facing the reaction frame (100).

7. The hanging basket preloading device according to claim 1, characterized in that: The pre-pressing mechanism includes a jack (400), the output end of the jack (400) is connected to the bottom wall of the reaction frame (100), and the bottom wall of the jack (400) is connected to the bottom mold (202).

8. The hanging basket preloading device according to claim 7, characterized in that: The pre-pressing mechanism further comprises a load-bearing beam (401), and the load-bearing beam (401) is arranged between the bottom of the jack (400) and the bottom mold (202).

9. The hanging basket preloading device according to claim 1, characterized in that: The hanging basket preloading device further comprises a measuring instrument, which is arranged on a fixed surface and is used to measure deformation parameters of the reaction frame (100).

10. The hanging basket preloading device according to any one of claims 1 to 9, characterized in that: The reaction frame (100) is in the shape of a right triangle, with one right-angled side being in contact with the truss (200) and the other right-angled side being connected to the pre-stressing mechanism.

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