Large-cantilever-flange single-box single-chamber cast-in-place box girder suspended casting hanging basket

Abstract

The utility model provides a large-cantilever-flange single-box single-chamber cast-in-place box girder suspension pouring hanging basket which comprises a hanging basket truss, a rear anchoring system, a suspension system and a pre-pressing system. The rear anchoring system comprises a pulling anchoring system and a lower anchoring system, the rear pulling force of the hanging basket is transmitted to the poured concrete box girder through the embedded part and the detachable connecting structure, and the hanging basket can be flexibly operated to guarantee safety when moving forwards. A rear sling and a front sling of the suspension system are anchored to the hanging basket connector and the front upper beam respectively, the lower portions of the rear sling and the front sling are anchored to the two ends of the front lower beam, and the front lower beam bears and disperses upper loads. The pre-pressing system utilizes a pre-embedded anchor frame, a hanging bracket, a reaction frame, a downward pressing jack, an upward pressing jack and other structures to achieve pre-pressing load application and stress state adjustment on the hanging basket, and the downward pressing jack is matched with a back pressure balance beam to enhance the balance capacity of the bottom of the hanging basket. The cast-in-situ hanging basket is reasonable in structural design, all the systems work cooperatively, and safety and stability of cast-in-situ box girder construction are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge engineering construction technical field especially, relate to a kind of large cantilever flange single-box single chamber cast-in-situ box girder cantilever pouring hanging basket. BACKGROUND

[0002] In bridge construction, the construction of large cantilever flange single-box single chamber cast-in-situ box girder is more difficult. The traditional cantilever pouring hanging basket has certain limitations in structure design and function implementation. For example, the rear anchoring system may not efficiently and stably transmit the hanging basket rear tension to the poured concrete box girder, resulting in insufficient stability of the hanging basket during construction and potential safety hazards; the suspension system has limited load bearing and dispersion capacity, which is difficult to meet the complex stress requirements during the construction of large cantilever flange single-box single chamber cast-in-situ box girder; the pre-pressing system cannot accurately apply pre-pressing load to the hanging basket and effectively adjust the stress state of the hanging basket, affecting the pouring quality of the box girder.

[0003] With the increasing requirements of bridge construction on structural safety and construction efficiency, there is an urgent need for a cantilever pouring hanging basket with more reasonable structure design and superior performance. SUMMARY

[0004] The utility model aims at providing a cantilever pouring hanging basket for large cantilever flange single-box single chamber cast-in-situ box girder.

[0005] To solve the above technical problems, the utility model provides a cantilever pouring hanging basket for large cantilever flange single-box single chamber cast-in-situ box girder, which comprises a hanging basket truss;

[0006] a rear anchoring system for transmitting the rear tension of the hanging basket truss to the poured concrete box girder, comprising a rear anchoring system and a lower anchoring system;

[0007] a suspension system comprising a rear sling and a front sling;

[0008] a pre-pressing system for applying pre-pressing load to the hanging basket truss;

[0009] Further, the rear anchoring system comprises:

[0010] an anchoring member placed in the reserved anchoring member in the concrete box girder behind the hanging basket truss;

[0011] an anchoring end plate connected to the bottom end of the tie rod of the anchoring member;

[0012] a threaded sleeve located at the top of the tie rod;

[0013] a tie cable connected to the threaded sleeve, and the other end of the tie cable is connected to the coupler at the rear end of the hanging basket, and the tie cable is a rear connecting structure.

[0014] Further, the lower anchoring system comprises:

[0015] The pre-embedded support frame is arranged in the concrete box girder at the bottom of the rear end of the hanging basket truss;

[0016] The adapter is arranged at the top of the support frame;

[0017] The fixing frame is connected to the adapter, and the fixing frame is a rear connecting structure;

[0018] The rear anchoring member is connected to the rear end coupler of the hanging basket truss through the fixing frame.

[0019] Further, the rear connecting structures of the rear anchoring system and the lower anchoring system are detachable structures, and when the hanging basket truss moves forward, the connection of the rear anchoring system is maintained, and the connection of the lower anchoring system is released.

[0020] Further, in the suspension system:

[0021] The upper end of the rear sling is anchored to the coupler of the hanging basket truss;

[0022] The upper end of the front sling is anchored to the front upper cross beam of the hanging basket truss;

[0023] The lower parts of the rear sling and the front sling are respectively anchored to the two ends of the front lower cross beam, and the front lower cross beam is fixed to the lower side of the concrete box girder, and the front lower cross beam forms a load-bearing frame at the bottom of the hanging basket truss.

[0024] Further, the pre-pressing system comprises:

[0025] The pre-embedded anchor frame and the pre-embedded hanger frame are pre-embedded in the concrete box girder and are used for suspending and fixing the pre-pressing device;

[0026] The counterforce frame is connected to the pre-embedded anchor frame through the connecting column;

[0027] The bottom beam of the counterforce frame is fixed to the pre-embedded anchor frame, and the upper part of the bottom beam is provided with a counter-pressure steel plate;

[0028] The tieback tendon is arranged in the connecting column and is anchored to the counter-pressure steel plate at the top;

[0029] The downward pressing jack is arranged on the cantilever side of the counterforce frame, and the downward pressing jack is used for providing downward pressure on the counter-pressure balance beam;

[0030] The upward pressing jack is arranged at the upper part of the front sling and is used for adjusting the stress state of the hanging basket truss during the pre-pressing process.

[0031] The beneficial effects of the utility model lie in:

[0032] 1) The rear anchoring system adopts the design of combining the rear anchoring system with the lower anchoring system, and can efficiently and stably transmit the rear tension of the hanging basket to the cast concrete box girder through the pre-embedded parts and the detachable connecting structure, can be flexibly operated when the hanging basket moves forward, and greatly improves the stability and safety of the hanging basket in the construction process.

[0033] 2) The pre-pressing system can accurately apply pre-pressing load to the hanging basket by using the pre-embedded anchor frame, hanging frame, counterforce frame, lower pressing jack, upper pressing jack and the like, and can effectively adjust the stress state of the hanging basket during the pre-pressing process, and the lower pressing jack cooperates with the counterforce balance beam to enhance the balance ability of the bottom of the hanging basket, thereby improving the pouring quality of the box girder and ensuring the safety and stability of the bridge structure.

[0034] 3) The hanging basket truss, the rear anchoring system, the suspension system and the pre-pressing system are reasonably designed and work cooperatively, and comprehensively improve the performance of the large cantilever flange single-box single-cell cast-in-place box girder suspension pouring hanging basket, and improve the efficiency and quality of the bridge construction. BRIEF DESCRIPTION OF DRAWINGS

[0035] Fig. 1 It is a large cantilever flange single-box single-cell cast-in-place box girder suspension pouring hanging basket installation schematic view.

[0036] Fig. 2 It is a pre-pressing system detail schematic view.

[0037] In the drawings, the component list represented by each reference numeral is as follows:

[0038] In the drawings: 16, concrete box girder; 17, hanging basket; 18, anchoring part; 19, anchoring end plate; 20, tie rod; 21, threaded sleeve; 22, tie cable; 23, coupler; 24, pre-embedded support frame; 25, adapter; 26, fixed frame; 27, rear anchoring part; 28, rear sling; 29, front sling; 30, front upper cross beam; 31, front lower cross beam; 32, upper pressing jack; 33, counterforce frame; 34, pre-embedded anchor frame; 35, connecting column; 36, tie reinforcement; 37, bottom beam; 38, counterforce steel plate; 39, counterforce balance beam; 40, lower pressing jack. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art belong to the scope of protection of the present application.

[0040] Those skilled in the art should understand that in the disclosure of the utility model, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as a limitation on the utility model.

[0041] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.

[0042] As Figs. 1-2 The utility model provides a big cantilever flange single box single chamber cast -in -place box girder cantilever formwork, including formwork truss 17, rear anchoring system, suspension system, pre -compression system.

[0043] Rear anchoring system transmits the rear tension of formwork truss 17 to the concrete box girder 16 that has been poured, including pull anchoring system and lower anchoring system, pull anchoring system includes the anchoring piece 18 that is placed in the concrete box girder 16 of formwork truss 17 rear side reservation, anchoring piece 18 is connected with the anchoring end plate 19 of the bottom end of pull tie rod 20, the top of pull tie rod 20 has threaded sleeve 21, threaded sleeve 21 is connected with pull tie 22, the other end of pull tie 22 is connected on the coupler 23 of formwork rear end, pull tie 22 is detachable rear connecting structure, lower anchoring system includes the embedded support frame 24 that is placed in the concrete box girder 16 of formwork truss 17 rear end bottom reservation, the top of support frame has adapter 25, adapter 25 is connected with fixed frame 26, and fixed frame 26 is detachable rear connecting structure, and fixed frame 26 is connected on the coupler 23 of formwork truss 17 rear end through rear anchoring piece 27, pull anchoring system and lower anchoring system jointly constitute rear anchoring system, in implementation, the rear connecting structure of pull anchoring system and lower anchoring system can be flexibly detached, when formwork truss 17 moves forward, can keep the connection of pull anchoring system, release the connection of lower anchoring system, guarantee the safety of formwork.

[0044] Suspension system includes the rear sling 28 of formwork, front sling 29, rear sling 28 upper end anchoring is in the coupler 23 of formwork truss 17, and the upper end of front sling 29 is anchored in the front upper crossbeam 30 of formwork truss 17, and the lower parts of rear sling 28 and front sling 29 are anchored with the both ends of front lower crossbeam 31 respectively, and front lower crossbeam 31 is fixed to the lower side of concrete box girder 16, and front lower crossbeam 31 constitutes the load-bearing frame of the bottom of formwork truss 17, bears the load that transmits down from the upper part, and disperses it to the lower structure of formwork.

[0045] The pre-pressing system for applying pre-pressing load to the hanging basket truss 17 comprises a pre-embedded anchor frame 34, a structure pre-embedded in the concrete box girder 16 for suspending and fixing the pre-pressing device; the pre-embedded anchor frame 34 is connected with the counterforce frame 33 through a connecting column 35, the bottom beam 37 of the counterforce frame 33 is fixedly arranged on the pre-embedded anchor frame 34, the upper portion of the bottom beam 37 is provided with a counter-pressing steel plate 38, the connecting column 35 is provided with a tieing tendon 36, the top of the tieing tendon 36 is anchored with the counter-pressing steel plate 38, the cantilever side of the counterforce frame 33 is provided with a downward pressing jack 40, the downward pressing jack 40 provides downward pressure on the counter-pressing balance beam 39, and the pre-pressing is realized by the counter-pressing balance beam 39 acting on the front lower cross beam 31, the counter-pressing balance beam 39 cooperates with the downward pressing jack 40, and the balance ability of the bottom of the hanging basket is further enhanced; meanwhile, the upper portion of the front hanging belt 29 is provided with an upward pressing jack 32, so that the stress state of the hanging basket during the pre-pressing process is adjusted.

[0046] The utility model is not limited to the above-mentioned best implementation, and anyone can draw other various forms of products under the enlightenment of the utility model, but no matter makes any change in its shape or structure, any technical scheme with same or similar as the application, falls in the protection scope of the utility model.

Claims

1. A large cantilever flange single-box single-cell cast-in-situ box girder cantilever casting formwork, characterized in that: The hanging basket truss (17) comprises a front anchoring system, a rear anchoring system, a suspension system and a pre-pressing system. The rear anchoring system is used to transfer the rear tension of the hanging basket truss (17) to the casted concrete box girder (16) and comprises a rear anchoring system and a lower anchoring system. The suspension system comprises a rear sling (28) and a front sling (29). The pre-pressing system is used to apply a pre-pressing load to the hanging basket truss (17).

2. The large cantilever flange single-box single-cell cast-in-situ box girder cantilever casting cradle according to claim 1, characterized in that, The rear anchoring system comprises: An anchoring member (18) reserved in the concrete box girder (16) at the rear side of the hanging basket truss (17); An anchoring end plate (19) connected to the bottom end of the tie rod (20) at the anchoring member (18); A threaded sleeve (21) located at the top of the tie rod (20); A tie cable (22) connected to the threaded sleeve (21) and the other end of the tie cable (22) is connected to the coupler (23) at the rear end of the hanging basket, and the tie cable (22) is a rear connecting structure.

3. The large cantilever flange single-box single-cell cast-in-situ box girder cantilever casting cradle according to claim 2, characterized in that, The lower anchoring system comprises: A pre-embedded support frame (24) reserved in the concrete box girder (16) at the bottom of the rear end of the hanging basket truss (17); An adapter (25) located at the top of the support frame; A fixing frame (26) connected to the adapter (25), and the fixing frame (26) is a rear connecting structure; A rear anchoring member (27) connected to the coupler (23) at the rear end of the hanging basket truss (17) through the fixing frame (26).

4. The large cantilever flange single-box single-cell cast-in-situ box girder cantilever casting cradle according to claim 3, characterized in that, The rear connecting structures of the rear anchoring system and the lower anchoring system are detachable structures, and when the hanging basket truss (17) moves forward, the connection of the rear anchoring system is maintained and the connection of the lower anchoring system is released.

5. The large cantilever flange single-box single-cell cast-in-situ box girder cantilever casting cradle according to claim 1, characterized in that, In the suspension system: The upper end of the rear sling (28) is anchored to the coupler (23) of the hanging basket truss (17); The upper end of the front sling (29) is anchored to the front upper cross beam (30) of the hanging basket truss (17); The lower parts of the rear sling (28) and the front sling (29) are respectively anchored to the two ends of the front lower cross beam (31), and the front lower cross beam (31) is fixed to the lower side of the concrete box girder (16), and the front lower cross beam (31) constitutes a load-bearing frame at the bottom of the hanging basket truss (17).

6. The large cantilever flange single-box single-cell cast-in-situ box girder cantilever casting cradle according to claim 1, characterized in that, The pre-pressing system comprises: A pre-embedded anchor frame (34) and a pre-embedded hanger embedded in the concrete box girder (16) for suspending and fixing the pre-pressing device; A counterforce frame (33) connected to the pre-embedded anchor frame (34) through a connecting column (35); A bottom beam (37) of the counterforce frame (33) fixed to the pre-embedded anchor frame (34), and a counter-pressure steel plate (38) is arranged at the upper part of the bottom beam (37); A tie bar (36) located in the connecting column (35) and anchored to the counter-pressure steel plate (38) at the top; A downward pressing jack (40) installed on the cantilever side of the counterforce frame (33), and the downward pressing jack (40) is used to provide downward pressure on the counter-pressure balance beam (39); An upward pressing jack (32) located at the upper part of the front sling (29) and used to adjust the stress state of the hanging basket truss (17) during pre-pressing.

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