Pre-pressing device suitable for construction of high-pier prestressed continuous beam
By using a combination of reaction frames and hydraulic jacks in the construction of high-pier prestressed continuous beams, the problems of difficult load distribution simulation and large site occupation in traditional prestressing methods were solved, achieving efficient and safe prestressing results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-02
- Publication Date
- 2026-03-20
AI Technical Summary
In the construction of traditional high-pier prestressed concrete continuous beams, it is difficult to simulate the actual load distribution during the prestressing of the formwork, which can easily lead to local overload and instability of the formwork. In addition, it requires a large site and is complicated to operate.
A reaction frame is fixed to the embedded parts, and hydraulic jacks are used for step-by-step preloading. The preloading test is carried out using the already poured 0# beam segment to reduce the use of concrete weight blocks or sandbags. Precise control is achieved through a triangular reaction frame welded from steel sections and hydraulic jacks.
This approach achieves safety and precision in the construction of high-pier prestressed concrete continuous beams, reduces site occupation, simplifies operation procedures, and improves the control accuracy and safety of preload.
Smart Images
Figure CN224016141U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the field of high-pier prestressed concrete continuous beam construction, and particularly relates to a pre-pressing device suitable for high-pier prestressed continuous beam construction. BACKGROUND
[0002] When the topography and construction site are limited, the high-pier prestressed concrete continuous beam construction is constructed by using the hanging basket construction according to the traditional construction mode. The pre-pressing test needs to be performed before the hanging basket construction, but the weight block or sandbag cannot well simulate the actual load distribution when pre-pressing, and the local overload is prone to occurring, thereby causing the instability of the hanging basket. Therefore, a hanging basket pre-pressing mode which is more safe, simple, precise and efficient and is suitable for high-pier prestressed concrete continuous beam construction needs to be designed. SUMMARY
[0003] Therefore, the application aims to overcome the defects in the prior art and provides a pre-pressing device suitable for high-pier prestressed continuous beam construction. Compared with the traditional pre-pressing method, the counterforce frame in the application does not need to be hoisted by a machine, occupies a smaller site, and the pre-pressing force is applied at a position closer to the actual load distribution of the beam section, and is easy to control.
[0004] To achieve the above-mentioned purpose, the technical scheme of the application is as follows:
[0005] A pre-pressing device suitable for high-pier prestressed continuous beam construction, comprising a hanging basket and a counterforce frame arranged below the hanging basket, a pre-buried part is arranged at the web plate of the interface between the 0# beam section which has been poured and the 1# beam section which is to be poured, and the counterforce frame is fixed on the pre-buried part; the counterforce frame is in a whole triangular shape, comprising a bottom frame body and an upper frame body which is arranged in an inclined manner on the bottom frame body, and a vertical support frame body is arranged between the bottom frame body and the upper frame body; a jack is arranged below the counterforce frame and corresponds to the longitudinal bridge loading position of the 1# beam section which is to be poured, and the jack is arranged on the load-bearing beam of the bottom basket of the hanging basket.
[0006] Further, the counterforce frame and the pre-buried part are fixed by welding.
[0007] Further, the jack is a hydraulic jack.
[0008] Further, the upper end and the lower end of the counterforce frame are fixed to the pre-buried part on the web plate by welding.
[0009] Further, the lower end of the upper frame body is fixed to the end of the bottom frame body away from the pre-buried part, and a stiffened plate is arranged between the upper frame body and the bottom frame body.
[0010] Further, the upper frame body comprises I-beams which are fixed by back-to-back welding.
[0011] Further, the bottom frame body comprises I-beams which are fixed by back-to-back welding.
[0012] Compared with the prior art, the application has the following advantages:
[0013] The counterforce frame in the application is a triangular counterforce frame welded by section steel, and has good overall structural strength and rigidity. In the construction of a high-pier prestressed concrete continuous beam, a pretest is performed by using a 0# beam segment that has been cast, thereby reducing the use of concrete weight blocks or sandbags, and the test is convenient. The pretest is performed by using a hydraulic jack to perform step-by-step prepressing, so that the prepressing load is more accurate and controllable. The counterforce frame is installed at the web, and the heaviest load of the beam section is also at the web, so that the loading position is more appropriate and reasonable. The application has the advantages of economy, safety, and simple construction. BRIEF DESCRIPTION OF DRAWINGS
[0014] The accompanying drawings, which form a part of the present application, are used to provide further understanding of the present application, and serve as an explanation of the present application, and do not constitute improper limitations on the present application. In the drawings:
[0015] Fig. 1 is a structural elevation schematic view of the application;
[0016] Fig. 2 is a structural cross-sectional schematic view of the application;
[0017] Fig. 3 is a schematic view of the counterforce frame part in the application.
[0018] Explanation of reference signs:
[0019] 1, jack; 2, bearing beam; 3, embedded part; 4, counterforce frame; 5, hanging basket; 6, bottom frame body; 7, upper frame body; 8, support frame body; 9, cushion beam. DETAILED DESCRIPTION
[0020] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other without conflict.
[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.
[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0023] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0024] A prestressing device suitable for the construction of high-pier prestressed continuous beams, such as Figs. 1 to 3 As shown, the system includes a hanging basket 5 and a reaction frame 4 arranged below the hanging basket. An embedded part 3 is set at the web of the interface between the already poured 0# beam segment and the 1# beam segment to be poured, and the reaction frame is fixed on the embedded part. The reaction frame is triangular in shape and includes a base frame 6 and an upper frame 7 arranged at an incline on the base frame. A vertical support frame 8 is provided between the base frame and the upper frame. The reaction frame is set at the longitudinal bridge loading position corresponding to the 1# beam segment to be poured, and a jack 1 is provided below the reaction frame. The jack is arranged on the load-bearing beam 2 of the bottom basket of the hanging basket.
[0025] The reaction frame is welded and fixed to the embedded parts. For example, the upper frame includes H-beams welded back-to-back. The lower frame also includes H-beams welded back-to-back. The jacks are hydraulic jacks; the pressure readings are read using a testing machine for step-by-step pre-compression. Preferably, a pad beam 9 is provided between the jacks and the load-bearing beams to ensure good stress distribution and structural stability between the jacks and the load-bearing beams.
[0026] The upper end and the lower end of the counterforce frame are welded to the embedded parts on the web plate.
[0027] The counterforce frame in the present application is a triangular counterforce frame welded by sectional steel, and has good overall structural strength and rigidity; in the construction of high-pier prestressed concrete continuous beam, a 0# beam segment that has been cast is used for pretest, thereby reducing the use of concrete weight blocks or sandbags, and improving the test convenience; the hydraulic jack is used for step-by-step prepressing, so that the prepressing load is more accurate and controllable; the counterforce frame is installed at the web plate, and the heaviest load of the beam section is also at the web plate, so that the loading position is more appropriate and reasonable, and the present application has the advantages of economy, safety and simple construction.
[0028] The above description is merely preferred embodiments of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A prestressing device suitable for the construction of high-pier prestressed continuous beams, characterized in that: The system includes a hanging basket and a reaction frame arranged below the hanging basket. Embedded parts are set at the web of the interface between the already poured 0# beam segment and the 1# beam segment to be poured, and the reaction frame is fixed on the embedded parts. The reaction frame is triangular in shape and includes a base frame and an upper frame arranged at an incline on the base frame. A vertical support frame is provided between the base frame and the upper frame. The reaction frame is set at the longitudinal bridge loading position corresponding to the 1# beam segment to be poured, and a jack is provided below the reaction frame. The jack is arranged on the load-bearing beam of the bottom basket of the hanging basket.
2. The prestressing device for high-pier prestressed continuous beam construction according to claim 1, characterized in that: The reaction frame is welded and fixed to the embedded parts.
3. A prestressing device suitable for the construction of high-pier prestressed continuous beams according to claim 1, characterized in that: The jack is a hydraulic jack.
4. A prestressing device suitable for the construction of high-pier prestressed continuous beams according to claim 1, characterized in that: The upper and lower ends of the reaction frame are both welded and fixed to the embedded parts on the web plate.
5. A prestressing device suitable for the construction of high-pier prestressed continuous beams according to claim 1, characterized in that: The lower end of the upper frame is fixed to the end of the base frame away from the embedded part, and a stiffening plate is provided between the upper frame and the base frame.
6. A prestressing device suitable for the construction of high-pier prestressed continuous beams according to claim 1, characterized in that: The upper frame consists of I-beams welded and fixed back-to-back.
7. A prestressing device suitable for the construction of high-pier prestressed continuous beams according to claim 1, characterized in that: The base frame includes I-beams welded and fixed back-to-back.