Adjustable jacking structure for cast-in-place box girder
By introducing a balance monitoring mechanism into the adjustable top support structure, and using counterweights and pressure sensors to detect and automatically adjust the tilt state, the imbalance problem of the existing top support structure during adjustment is solved, and stable support and efficient construction of the box girder are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2026-03-27
AI Technical Summary
The existing adjustable top support structure lacks an automatic balance correction mechanism when adjusting the height, which can easily introduce human error, leading to unstable box girder support and affecting construction quality and safety.
An adjustable top support structure was designed, comprising a support body, a horizontal bar, a vertical bar, a lead screw, an adjusting nut, and a balance monitoring mechanism. The tilt state is detected by a counterweight and a pressure sensor, and the structure is automatically adjusted to a balanced state.
It enables self-checking of balance after height adjustment, ensuring that the supporting body provides balanced support to the upper structure, thus improving construction safety and efficiency.
Smart Images
Figure CN224047919U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to box girder jacking technology field, more particularly, relate to a kind of adjustable jacking structure for cast-in-place box girder. BACKGROUND
[0002] In modern bridge construction, cast-in-place box girder as an important structural form, is widely used in highway, railway and urban bridge fields.Cast-in-place box girder construction precision and stability of support structure are directly related to the overall quality and safety of bridge.The traditional box girder jacking structure is mostly fixed or simple adjustable design, these designs have certain limitations in height adjustment, especially in the face of complex terrain or need to adjust height accurately, often difficult to meet the construction requirements.
[0003] The existing adjustable jacking structure mostly relies on manual or mechanical way to adjust jacking height, but lacks automatic balance correction mechanism during adjustment process, when construction personnel need to adjust the height of box girder jacking, usually need to operate multiple adjusting components, this process is not only cumbersome, but also easy to introduce human error, resulting in jacking structure cannot maintain horizontal state after height adjustment, and further affect the pouring quality of box girder and subsequent construction precision, in addition, due to the existence of small inclination on the upper surface of box girder, or foundation settlement and other factors in construction process, even if jacking reaches horizontal state in initial adjustment, it may gradually deviate from horizontal position in use, and this inclination state cannot be found and adjusted in time, which will seriously affect the support stability and construction safety of cast-in-place box girder, therefore, aiming at the above technical problems, a kind of adjustable jacking structure for cast-in-place box girder is proposed. SUMMARY
[0004] The utility model aims at providing a kind of adjustable jacking structure for cast-in-place box girder, whether the support main body is in balanced state can be detected during height adjustment structure, and the support main body is adjusted to balanced state, the support main body can be balanced and supported to upper structure, the effect of self-checking balance after height adjustment is realized.
[0005] The utility model realizes the following technical scheme:
[0006] A kind of adjustable jacking structure for cast-in-place box girder, including support main body and fixed installation on the horizontal rod of box girder, the outside of the horizontal rod is tied with vertical rod, the vertical rod top is slidably connected with lead screw, the vertical rod top is rotatably connected with adjusting nut, and adjusting nut and lead screw are screw connection;
[0007] The bottom of the supporting body is rotationally connected with a supporting plate, the bottom of the supporting plate is fixedly connected with a clamping seat, a screw rod abuts against and is rotationally connected to the inner side of the clamping seat, the inner side of the supporting body is provided with a cavity, the inner side of the cavity is provided with a balance monitoring mechanism, the lower side of the supporting plate is threadedly connected with a screw rod, the upper end of the screw rod penetrates through the upper surface of the supporting plate and is fixedly connected with a top block, and the top block abuts against the bottom of the supporting body.
[0008] Preferably, the outer part of the adjusting nut is fixedly connected with a control rod.
[0009] Preferably, a rotating rod is rotationally connected between the supporting body and the supporting plate, and the rotating rod is located at the central part of the supporting body and the supporting plate.
[0010] Preferably, the balance monitoring mechanism comprises a fixed rod, a rotating column, a counterweight and a pressure sensor, the fixed rod is fixedly connected to the inner side of the cavity, the number of the fixed rods is several groups and is arranged at equal intervals, and the rotating column is rotationally connected to the outer part of the fixed rod.
[0011] Preferably, the counterweight is slidingly connected to the upper side of the rotating column, the counterweight is made of metal material, the pressure sensor is fixedly connected to the inner side of the cavity, the number of the pressure sensors is two groups and is symmetrically arranged, and the positions of the pressure sensors correspond to the counterweight.
[0012] Preferably, the number of the screw rods is two groups and is symmetrically arranged.
[0013] Preferably, the bottom of the screw rod is fixedly connected with a connecting rod, the outer part of the screw rod is threadedly connected with a fastening nut, and the fastening nut abuts against the lower surface of the supporting plate.
[0014] The technical scheme of the utility model has at least the following beneficial effects:
[0015] The adjustable jacking structure for the cast-in-place box girder is proposed in the utility model, when the supporting body is in an unbalanced state due to manual adjustment error or the inclination of the box girder, the counterweight will roll along the rotating column under the action of gravity, slide to the inclined side, and collide with the pre-set pressure sensor in the cavity, the collision signal is immediately received by the external monitoring device, the staff can quickly respond, the fastening nut on the lower side is unscrewed, the corresponding screw rod is rotated by using the connecting rod to realize the upward lifting of the screw rod on the side, the top block drives the lower side of the supporting body to be jacked up, the supporting body is slightly rotated relative to the supporting plate until the horizontal balance state is reached, not only the accurate control of the jacking height is realized, but also the built-in self-checking balance mechanism ensures that the supporting body can always provide balanced and stable support to the structure above, and the safety and efficiency of construction are greatly improved. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is the whole structure schematic view of the utility model;
[0017] Figure 2 It is the local structure schematic view of the utility model;
[0018] Figure 3 It is Figure 1 The enlarged view of A;
[0019] Figure 4 It is Figure 1 The enlarged view of B;
[0020] Icon: 1, support main body; 2, support plate; 3, rotating rod; 4, clamping seat; 5, horizontal rod; 6, vertical rod; 7, screw rod; 8, adjusting nut; 9, control rod; 10, cavity; 11, fixed rod; 12, rotating column; 13, counterweight; 14, pressure sensor; 15, screw rod; 16, top block; 17, connecting rod; 18, fastening nut. Specific implementation
[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0022] Please refer to Figures 1-4 The utility model proposes a kind of adjustable jacking structure for cast-in-place box girder, including support main body 1 and fixed installation in horizontal rod 5 on box girder, horizontal rod 5 is tied with vertical rod 6 outside, vertical rod 6 top is slidably connected with screw rod 7, vertical rod 6 top is rotatably connected with adjusting nut 8, and adjusting nut 8 and screw rod 7 are threadedly connected;
[0023] The bottom of support main body 1 is rotatably connected with support plate 2, the bottom of support plate 2 is fixedly connected with clamping seat 4, and screw rod 7 is abutted and rotatably connected to the inside of clamping seat 4, the inside of cavity 10 is provided with balance monitoring mechanism, the lower side of support plate 2 is threadedly connected with screw rod 15, the upper end of screw rod 15 penetrates the upper surface of support plate 2 and is fixedly connected with top block 16, and top block 16 is abutted to the bottom of support main body 1.
[0024] The outside of adjusting nut 8 is fixedly connected with control rod 9, and setting control rod 9 is convenient for controlling adjusting nut 8 to rotate adjusting screw rod 7 to slide up and down.
[0025] The rotating rod 3 is rotatably connected between the supporting body 1 and the supporting plate 2, and is located at the central part of the supporting body 1 and the supporting plate 2, so that the relative rotation between the supporting body 1 and the supporting plate 2 is facilitated to adjust the balance.
[0026] The balance monitoring mechanism comprises a fixed rod 11, a rotating column 12, a counterweight 13 and a pressure sensor 14, the fixed rod 11 is fixedly connected to the inner side of the cavity 10, and the number of the fixed rod 11 is several groups and is arranged at equal intervals, and the rotating column 12 is rotatably connected to the outside of the fixed rod 11.
[0027] The counterweight 13 is slidably connected to the upper side of the rotating column 12, and the counterweight 13 is made of metal material, the pressure sensor 14 is fixedly connected to the inner side of the cavity 10, and the number of the pressure sensor 14 is two groups and is symmetrically arranged, and the position of the pressure sensor 14 corresponds to the counterweight 13.
[0028] The number of the screw rod 15 is two groups and is symmetrically arranged, so that the balance adjustment of the left and right sides is facilitated.
[0029] The bottom of the screw rod 15 is fixedly connected with a connecting rod 17, and the outside of the screw rod 15 is threadedly connected with a fastening nut 18, and the fastening nut 18 abuts against the lower surface of the supporting plate 2.
[0030] The working principle of the adjustable jacking structure for the cast-in-place box girder based on the embodiment is that when the height of the box girder jacking needs to be adjusted, the control rods 9 on the left and right sides are synchronously rotated, so that the adjusting nuts 8 are rotated on the top of the vertical rods 6, and since the screw rods 7 are threadedly connected with the adjusting nuts 8, the screw rods 7 are controlled to slide upward, so that the supporting body 1 is integrally moved upward, and when the supporting body 1 is in an inclined state due to the error of manual adjustment or the inclination of the upper surface of the box girder, the counterweight 13 in the cavity 10 slides to one side under the rolling and guiding action of the rotating column 12, and collides with the pressure sensor 14 installed in the cavity 10, so that it can be monitored by the external monitoring device, and at this time, the worker can unscrew the lower fastening nut 18, controls the screw rod 15 to rotate through the connecting rod 17, rotates the screw rod 15 on the lower side upward, and makes the jacking block 16 jack up the lower side of the supporting body 1, so that the supporting body 1 is rotated relative to the supporting plate 2, thereby adjusting the supporting body to the balanced state, facilitating that the supporting body 1 can balance support the structure above, and realizing the effect that the balance can be self-checked after the height is adjusted.
[0031] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.
Claims
1. An adjustable jacking structure for a cast-in-place box girder, characterized by: The utility model provides a kind of box girder supporting device, including support body (1) and fixed installation on horizontal bar (5) of box girder, the outside of horizontal bar (5) is tied with vertical rod (6), the top sliding connection of vertical rod (6) has screw rod (7), the top rotationally connected of vertical rod (6) has adjusting nut (8), and adjusting nut (8) and screw rod (7) are threadedly connected; The bottom of the support body (1) is rotationally connected with a support plate (2), the bottom of the support plate (2) is fixedly connected with a clamping seat (4), and the inner side of the clamping seat (4) is abutted and rotationally connected with the screw rod (7), a cavity (10) is formed in the inner side of the support body (1), a balance monitoring mechanism is installed in the cavity (10), and a screw rod (15) is threadedly connected to the lower side of the support plate (2), the upper end of the screw rod (15) penetrates through the upper surface of the support plate (2) and is fixedly connected with a top block (16), and the top block (16) abuts against the bottom of the support body (1).
2. The adjustable jacking structure for cast-in-place box girder according to claim 1, wherein: The outer side of the adjusting nut (8) is fixedly connected with a control rod (9).
3. The adjustable jacking structure for cast-in-place box girder according to claim 1, wherein: The support body (1) and the support plate (2) are rotationally connected with a rotating rod (3), and the rotating rod (3) is located at the central part of the support body (1) and the support plate (2).
4. The adjustable jacking structure for cast-in-place box girder according to claim 1, wherein: The balance monitoring mechanism comprises a fixed rod (11), a rotating column (12), a counterweight (13) and a pressure sensor (14), the fixed rod (11) is fixedly connected to the inner side of the cavity (10), and the number of the fixed rod (11) is several groups and is arranged at equal intervals, and the rotating column (12) is rotationally connected to the outer side of the fixed rod (11).
5. The adjustable jacking structure for cast-in-place box girder according to claim 4, characterized in that: The counterweight (13) is slidingly connected to the upper side of the rotating column (12), and the counterweight (13) is made of metal material, the pressure sensor (14) is fixedly connected to the inner side of the cavity (10), and the number of the pressure sensor (14) is two groups and is symmetrically arranged, and the position of the pressure sensor (14) corresponds to the counterweight (13).
6. The adjustable jacking structure for cast-in-place box girder according to claim 1, wherein: The number of the screw rod (15) is two groups and is symmetrically arranged.
7. The adjustable jacking structure for cast-in-place box girder according to claim 1, wherein: The bottom of the screw rod (15) is fixedly connected with a connecting rod (17), and the outer side of the screw rod (15) is threadedly connected with a fastening nut (18), and the fastening nut (18) abuts against the lower surface of the support plate (2).