Prepressing construction device for prestressed concrete variable cross-section continuous rigid frame reaction frame

Abstract

The utility model relates to the technical field of constructional engineering, in particular to a pre-pressing construction device for a prestressed concrete variable cross-section continuous rigid frame reaction frame. A prestressed concrete variable cross-section continuous rigid frame counter-force frame pre-pressing construction device comprises a bracket, a counter-force frame, a jacking mechanism, a pressing mechanism and a measuring mechanism. The bracket is arranged on the side wall of the top end of the pier. The counter-force frame is arranged on the top of the pier through the anchoring part. The bottom of the jacking mechanism is arranged between the bracket and the counter-force frame, and the jacking mechanism is used for jacking the counter-force frame so as to generate pre-pressure on the bracket and the pier; the downward pressing mechanism is used for generating downward pressure on the reaction frame so that the reaction frame can tend to move towards the pier. And the measuring mechanism is arranged at the bottom of the reaction frame and is used for measuring the pressure received by the reaction frame in real time. In this way, pre-pressing of the pier and the bracket can be rapidly and efficiently achieved, the pre-pressing efficiency is high, and the pre-pressing result can be directly obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of construction engineering, in particular to a prestressed concrete variable-section continuous rigid frame reaction frame preloading construction device. Background Art

[0002] Block 0 is an engineering term in bridge construction. Span-wide continuous beam bridges are generally constructed in sections, and each section is called a "block". Block 0 is the first unit of the bridge to be cast. It is located directly above the pier and is the first block of the building extending from the pier to both sides. During the hanging basket casting and segment assembly, the entire beam must be divided into several sections according to length or prestressed tendons or rods, and construction must be carried out section by section. Generally, the section at the top of the pier is called segment 0 or block 0. The design requirements for the cast-in-place beam block 0 of the segment construction generally require the use of a bracket to be cast in place. After completion, it is used as a hanging basket assembly platform to prepare for the subsequent box beam segment construction. The continuous rigid frame block 0 is generally a large-volume concrete cast-in-place construction. The stability and deformation of the bracket are the key to determining the success of the cast-in-place beam construction. After the bracket is assembled, the bracket must be pre-stressed to eliminate inelastic deformation and measure the elastic deformation under the corresponding load to test the stress condition of the rod and the stability of the entire bracket.

[0003] The existing preloading method of the No. 0 block bracket is to apply a force between the bracket and the reaction frame through a jack. However, this preloading method has the disadvantages of single preloading force, low preloading efficiency, and unintuitive preloading results. Utility Model Content

[0004] The objectives of the utility model include, for example, providing a prestressing construction device for a prestressed concrete variable-section continuous rigid frame reaction frame, which can quickly and efficiently achieve prestressing of bridge piers and brackets, has high prestressing efficiency, and can directly obtain the prestressing result.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] In a first aspect, the utility model provides a prestressing construction device for a prestressed concrete variable-section continuous rigid frame reaction frame, comprising:

[0007] Bracket, reaction frame, lifting mechanism, pressing mechanism and measuring mechanism;

[0008] The bracket is arranged on the side wall of the top of the pier, and the reaction frame is arranged on the top of the pier through an anchor;

[0009] The bottom of the jacking mechanism is arranged at the top of the bracket, the top of the jacking mechanism is directly opposite to the bottom of the reaction frame, and the jacking mechanism is used to jack up the reaction frame so as to generate pre-pressure on the bracket and the bridge pier;

[0010] One end of the pressing mechanism is connected to the bridge pier, and the other end of the pressing mechanism is movably connected to the reaction frame, and the pressing mechanism is used to generate downward pressure on the reaction frame so that the reaction frame has a tendency to move toward the bridge pier;

[0011] The measuring mechanism is arranged at the bottom of the reaction frame, and is used to measure the pressure received by the reaction frame in real time; and the top of the jacking mechanism is connected to the reaction frame through at least one of the measuring mechanisms.

[0012] In an optional embodiment, the jacking mechanism includes a distribution beam and a jacking member;

[0013] The distribution beam is arranged on the bracket, the lifting member is arranged on the top of the distribution beam, and the lifting member can be close to the top of the reaction frame to lift the reaction frame.

[0014] In an optional embodiment, the lifting member is a jack.

[0015] In an optional embodiment, a sliding block is also included;

[0016] The sliding block is movably arranged on the top surface of the bracket to be close to or away from the pier;

[0017] The lifting mechanism is arranged on the sliding block.

[0018] In an optional embodiment, the measuring mechanism includes a plurality of sensor sheets and a display screen;

[0019] The sensor sheets are all arranged on the bottom surface of the reaction frame, and the sensor sheets are electrically connected to the display screen.

[0020] In an optional embodiment, a plurality of sensor sheets extend along the length direction of the reaction frame.

[0021] In an optional embodiment, the pressing mechanism includes a matching column, a pressing block and a driving member;

[0022] The reaction frame is provided with a matching hole, and the matching column is fixedly connected to the top of the pier after passing through the matching hole; the pressing block is movably arranged on one side of the matching column located at the top of the reaction frame;

[0023] The driving member is in transmission connection with the lower pressing block so as to drive the lower pressing block to move toward the reaction frame to press the reaction frame.

[0024] In an optional embodiment, the mating column is threadably mated with the pressing block.

[0025] In an optional embodiment, the driving member is a rotary motor to drive the pressing block to rotate on the matching column to approach or move away from the reaction frame.

[0026] In an optional embodiment, a plane bearing is provided between the lower pressing block and the top of the reaction frame.

[0027] The beneficial effects of the embodiments of the present utility model include, for example:

[0028] Such a prestressed concrete variable-section continuous rigid frame reaction frame preloading construction device includes a bracket, a reaction frame, a jacking mechanism, a pressing mechanism and a measuring mechanism. The jacking mechanism can independently apply a force between the reaction frame and the bracket to achieve the first preloading; at the same time, the pressing mechanism can move the reaction frame toward the top of the pier, so that the downward pressure received by the reaction frame can be transmitted to the pier and to the bracket through the jacking mechanism, thus achieving the second preloading. In this way, the jacking mechanism and the pressing mechanism cooperate to achieve two preloading operations. The measuring mechanism is arranged on the reaction frame, and when the reaction frame is subjected to force changes, the force change can be obtained in time, and then the change in preloading pressure can be obtained. In summary, such a prestressed concrete variable-section continuous rigid frame reaction frame preloading construction device has the advantages of simple structure, convenient layout, intuitive preloading pressure and high preloading efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a structural schematic diagram of a prestressed concrete variable-section continuous rigid frame reaction frame preloading construction device according to an embodiment of the utility model;

[0031] Figure 2 It is a partial schematic diagram of a prestressed concrete variable-section continuous rigid frame reaction frame preloading construction device according to an embodiment of the utility model;

[0032] Figure 3 It is a partial structural schematic diagram of another perspective of a prestressed concrete variable-section continuous rigid frame reaction frame preloading construction device according to an embodiment of the utility model;

[0033] Figure 4 This is a partial structural schematic diagram of another perspective of a prestressed concrete variable-section continuous rigid frame reaction frame preloading construction device in an embodiment of the utility model.

[0034] Icons: 11- plane bearing; 12- sliding block; 13- anchor; 100- bracket; 200- reaction frame; 201- matching hole; 300- lifting mechanism; 310- distribution beam; 320- lifting member; 400- pressing mechanism; 410- matching column; 420- pressing block; 430- driving member; 500- measuring mechanism; 510- sensor sheet; 520- display screen. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. 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.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model.

[0039] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0040] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0041] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4This embodiment provides a prestressing construction device for a prestressed concrete variable-section continuous rigid frame reaction frame 200, comprising:

[0042] Bracket 100, reaction frame 200, lifting mechanism 300, pressing mechanism 400 and measuring mechanism 500;

[0043] The bracket 100 is arranged on the side wall of the top of the pier, and the reaction frame 200 is arranged on the top of the pier through the anchor 13;

[0044] The bottom of the jacking mechanism 300 is arranged at the top of the bracket 100, and the top of the jacking mechanism 300 is directly opposite to the bottom of the reaction frame 200. The jacking mechanism 300 is used to jack up the reaction frame 200 to generate pre-pressure on the bracket 100 and the bridge pier;

[0045] One end of the pressing mechanism 400 is connected to the bridge pier, and the other end of the pressing mechanism 400 is movably connected to the reaction frame 200. The pressing mechanism 400 is used to generate downward pressure on the reaction frame 200 so that the reaction frame 200 has a tendency to move toward the bridge pier.

[0046] The measuring mechanism 500 is disposed at the bottom of the reaction frame 200 , and is used to measure the pressure received by the reaction frame 200 in real time; and the top of the jacking mechanism 300 is connected to the reaction frame 200 via at least one measuring mechanism 500 .

[0047] The jacking mechanism 300 can independently apply a force between the reaction frame 200 and the bracket 100 to achieve the first prestressing; at the same time, the pressing mechanism 400 can move the reaction frame 200 toward the top of the pier, so that the downward pressure received by the reaction frame 200 can be transmitted to the pier and to the bracket 100 through the jacking mechanism 300, thus achieving the second prestressing. In this way, the jacking mechanism 300 and the pressing mechanism 400 cooperate to achieve two prestressing operations. The measuring mechanism 500 is arranged on the reaction frame 200, and when the force on the reaction frame 200 changes, the force change can be obtained in time, and then the change in prestressing force can be obtained. In summary, such a prestressing construction device for a prestressed concrete variable-section continuous rigid frame reaction frame 200 has the advantages of simple structure, convenient layout, intuitive prestressing force, and high prestressing efficiency.

[0048] Furthermore, each pier head is fixedly connected to the reaction frame 200 through two anchors 13. Specifically, it can be completed by pouring. At the same time, the bracket 100 is connected to the above two anchors 13 through a horizontal anchor, so as to ensure the stability and reliability of the bracket 100.

[0049] Optionally, the lifting mechanism 300 includes a distribution beam 310 and a lifting member 320; the distribution beam 310 is disposed on the bracket 100, and the lifting member 320 is disposed on the top of the distribution beam 310, and the lifting member 320 can be close to the top of the reaction frame 200 to lift the reaction frame 200. The distribution beam 310 can connect the two ends of the span passing through the bridge pier, so as to ensure the stability and uniformity of the force of the bracket 100.

[0050] Optionally, the lifting member 320 is a jack. It is not difficult to understand that in other embodiments, the lifting member 320 can also be an electric cylinder or a pneumatic cylinder, which is just an example.

[0051] Optionally, a prestressed construction device for a prestressed concrete variable-section continuous rigid frame reaction frame 200 further includes a sliding block 12; the sliding block 12 can be movably arranged on the top surface of the bracket 100 to move closer to or away from the bridge pier; and the jacking mechanism 300 is arranged on the sliding block 12. The sliding block 12 can drive the jacking mechanism 300 to move closer to or away from the bridge pier, thereby adjusting the force point of the reaction frame 200. Specifically, the data of the multiple measuring mechanisms 500 under the reaction frame 200 can be adjusted by moving the sliding block 12 to apply uniform prestress to the reaction frame 200 by adjusting the jacking mechanism 300.

[0052] Optionally, the measuring mechanism 500 includes a plurality of sensor sheets 510 and a display screen 520; the sensor sheets 510 are all arranged on the bottom surface of the reaction frame 200, and the sensor sheets 510 are electrically connected to the display screen 520. That is, through the display screen 520, the staff can visually view the force changes on the reaction frame 200 to meet the safety and accuracy during the preloading process.

[0053] Optional, such as Figure 2 , a plurality of sensor sheets 510 extend along the length direction of the reaction frame 200. A plurality of sensor sheets 510 arranged in sequence can ensure the accuracy and reliability of the force detection of the reaction frame 200.

[0054] Optional, such as Figure 1 and Figure 4 The pressing mechanism 400 includes a matching column 410, a pressing block 420 and a driving member 430; a matching hole 201 is provided on the reaction frame 200, and the matching column 410 is fixedly connected to the top of the pier after passing through the matching hole 201; the pressing block 420 is movably arranged on one side of the matching column 410 located at the top of the reaction frame 200; the driving member 430 is in transmission connection with the pressing block 420 to drive the pressing block 420 to move toward the reaction frame 200 and press the reaction frame 200. The pressing block 420 applies downward pressure to the top of the reaction frame 200, which can transmit the force to the pier on the one hand, and can also transmit it to the bracket 100 through the lifting mechanism 300 on the other hand. At the same time, the matching column 410 serves as both a rotation matching structure of the pressing block 420 and a guiding structure for the movement of the pressing block 420.

[0055] It can also be seen from the figure that the engaging column 410 is located between the two anchors 13 .

[0056] Optionally, the matching column 410 is threadedly matched with the lower pressing block 420. In this way, the matching column 410 and the lower pressing block 420 form a threaded screw mechanism.

[0057] Optionally, the driving member 430 is a rotary motor to drive the lower pressing block 420 to rotate on the matching column 410 to approach or move away from the reaction frame 200. Specifically, as an embodiment, the rotary motor drives the matching column 410 with external teeth to rotate through a gear, thereby moving up and down to approach or move away from the reaction frame 200.

[0058] Optionally, a plane bearing 11 is provided between the lower pressing block 420 and the top of the reaction frame 200. The plane bearing 11 can ensure uniform force on the top surface of the lower pressing block 420 and the reaction frame 200.

[0059] In summary, the embodiment of the utility model provides a prestressing construction device for a prestressed concrete variable-section continuous rigid frame reaction frame 200, which has the following advantages:

[0060] The lifting mechanism 300 and the pressing mechanism 400 cooperate to realize two pre-pressing operations. The measuring mechanism 500 is arranged on the reaction frame 200;

[0061] When the force on the reaction frame 200 changes, the force change can be obtained in time, and then the change of the preload pressure can be obtained.

[0062] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A prestressed concrete variable-section continuous rigid frame reaction frame preloading construction device, characterized in that: include: Bracket, reaction frame, lifting mechanism, pressing mechanism and measuring mechanism; The bracket is arranged on the side wall of the top of the pier, and the reaction frame is arranged on the top of the pier through an anchor; The bottom of the jacking mechanism is arranged at the top of the bracket, the top of the jacking mechanism is directly opposite to the bottom of the reaction frame, and the jacking mechanism is used to jack up the reaction frame so as to generate pre-pressure on the bracket and the bridge pier; One end of the pressing mechanism is connected to the bridge pier, and the other end of the pressing mechanism is movably connected to the reaction frame, and the pressing mechanism is used to generate downward pressure on the reaction frame so that the reaction frame has a tendency to move toward the bridge pier; The measuring mechanism is arranged at the bottom of the reaction frame, and is used to measure the pressure received by the reaction frame in real time; and the top of the jacking mechanism is connected to the reaction frame through at least one of the measuring mechanisms.

2. A prestressed concrete variable-section continuous rigid frame reaction frame preloading construction device according to claim 1, characterized in that: The lifting mechanism comprises a distribution beam and a lifting member; The distribution beam is arranged on the bracket, the lifting member is arranged on the top of the distribution beam, and the lifting member can be close to the top of the reaction frame to lift the reaction frame.

3. A prestressed concrete variable-section continuous rigid frame reaction frame preloading construction device according to claim 2, characterized in that: The lifting member is a jack.

4. A prestressed concrete variable-section continuous rigid frame reaction frame preloading construction device according to claim 1, characterized in that: Also includes a sliding block; The sliding block is movably arranged on the top surface of the bracket to be close to or away from the pier; The lifting mechanism is arranged on the sliding block.

5. The prestressed concrete variable-section continuous rigid frame reaction frame preloading construction device according to claim 1, characterized in that: The measuring mechanism includes a plurality of sensor sheets and a display screen; The sensor sheets are all arranged on the bottom surface of the reaction frame, and the sensor sheets are electrically connected to the display screen.

6. A prestressed concrete variable-section continuous rigid frame reaction frame preloading construction device according to claim 5, characterized in that: A plurality of sensor sheets extend along the length direction of the reaction frame.

7. The prestressed concrete variable-section continuous rigid frame reaction frame preloading construction device according to claim 1, characterized in that: The pressing mechanism comprises a matching column, a pressing block and a driving member; The reaction frame is provided with a matching hole, and the matching column is fixedly connected to the top of the pier after passing through the matching hole; the pressing block is movably arranged on one side of the matching column located at the top of the reaction frame; The driving member is in transmission connection with the lower pressing block so as to drive the lower pressing block to move toward the reaction frame to press the reaction frame.

8. A prestressed concrete variable-section continuous rigid frame reaction frame preloading construction device according to claim 7, characterized in that: The matching column is threadably matched with the lower pressing block.

9. A prestressed concrete variable-section continuous rigid frame reaction frame preloading construction device according to claim 8, characterized in that: The driving member is a rotary motor to drive the pressing block to rotate on the matching column to approach or move away from the reaction frame.

10. A prestressed concrete variable-section continuous rigid frame reaction frame preloading construction device according to claim 7, characterized in that: A plane bearing is arranged between the lower pressing block and the top of the reaction frame.

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