Operation platform for secondary tensioning of bent cap

Abstract

The application discloses an operating platform for secondary tensioning of a bent cap, and the operating platform is composed of a hanging basket, wherein the hanging basket comprises a basket and a lap longitudinal beam, the lap longitudinal beam is fixedly connected to the basket and extends to the upper surface of the bent cap in the longitudinal direction; in the use state, the hanging basket is subjected to a pulling force towards the opposite direction and is fixed to the end of the bent cap, at this time, the lower surface of the lap longitudinal beam is attached to the upper surface of the bent cap, the hanging basket is hoisted into position by using the weight of the structure of the hanging basket itself, and the in-place installation of the operating platform can be completed by combining the opposite tensioning, the bent cap does not need to be subjected to anchoring damage as a whole, the construction period is relatively short, and the construction efficiency is greatly improved; the bent cap can be subjected to the secondary tensioning of the prestress in a timely and efficient manner after the box girder is in place, compared with the prior art, the safety level is improved, the construction cost is reduced, and the overall quality of the bent cap is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to a bridge construction auxiliary facility, in particular to an operating platform for secondary tensioning of a bent cap. BACKGROUND

[0002] In the construction process of urban viaduct, secondary prestress tensioning is needed for the construction of bent cap in place to ensure the overall support strength. In the prior art, the secondary tensioning construction of prestress needs to install a small box girder (steel-concrete composite girder) on the top of the bent cap to bear the load and then tension in time, which has good tensioning effect. However, at this stage, the bridge deck cannot be formed, so the construction cannot be carried out on the bridge deck; usually, a ground support frame and a support platform are used for tensioning operation, which greatly increases the construction cost, and the temporary construction needs a time period, and the foundation is unstable, which has safety hazards for personnel going up and down, so that in the construction, the secondary tensioning of prestress of the bent cap cannot be carried out in time, thereby causing quality hidden troubles of linear deformation of the bent cap.

[0003] However, the installation of the operating platform on the bent cap will cause damage to the bent cap, and the construction period is still very long, which reduces the construction efficiency.

[0004] Therefore, it is necessary to improve the existing secondary tensioning operation of the prestress of the bent cap, which can efficiently and timely tension the secondary prestress of the bent cap, compared with the prior art, improves the safety level, reduces the construction cost, and ensures the overall quality of the bent cap. SUMMARY

[0005] Therefore, the purpose of the present application is to provide an operating platform for secondary tensioning of a bent cap, which can efficiently and timely tension the secondary prestress of the bent cap, compared with the prior art, improves the safety level, reduces the construction cost, and ensures the overall quality of the bent cap.

[0006] The operating platform for secondary tensioning of a bent cap of the present application is composed of a basket, which includes a basket and a lap longitudinal beam, the lap longitudinal beam is fixedly connected to the basket and extends to the upper surface of the bent cap in the longitudinal direction; in use, the basket is subjected to a tension force towards the opposite direction and is fixed to the end of the bent cap, at this time, the lower surface of the lap longitudinal beam is attached to the upper surface of the bent cap.

[0007] Further, the lap longitudinal beam includes a long longitudinal beam fixed to the distal edge of the basket and extending to the upper surface of the bent cap after being in place, and a short longitudinal beam fixed to the proximal edge of the basket and extending to the upper surface of the bent cap after being in place;

[0008] Further, the short longitudinal beams are several and are arranged in parallel along the transverse direction near the middle of the basket, and the long longitudinal beams are several and are arranged in parallel along the transverse direction on both sides of the several short longitudinal beams; the adjacent overlapping longitudinal beams are fixedly connected with the overlapping transverse beams, and the lower surfaces of the overlapping transverse beams are attached to the upper surface of the cover beam in the use state.

[0009] Further, the lower surfaces of the overlapping longitudinal beams and the overlapping transverse beams are roughened; the center of gravity of the hanging basket is located on one side of the overlapping longitudinal beams.

[0010] Further, the hanging basket further comprises a rollover prevention beam assembly arranged below the basket, the rollover prevention beam assembly comprises at least two rollover prevention beams arranged in parallel along the transverse direction; after being tensioned, the rollover prevention beams can be driven to abut against the lower surface of the cover beam to form a structure for resisting the lateral overturning of the basket.

[0011] Further, the basket comprises a support body, a frame body surrounding plate and a bottom plate, the support body is a cuboid frame composed of a frame bottom longitudinal beam, a frame bottom transverse beam, a frame body vertical beam, a frame top longitudinal beam and a frame top transverse beam, the bottom plate is fixed to the bottom of the cuboid frame to form the bottom of the operation platform, and the frame body surrounding plate is fixed between adjacent frame body vertical beams and leaves an operation position for the prestressed secondary tensioning of the cover beam;

[0012] The long edges of the cuboid frame are located in the transverse direction, frame body auxiliary vertical beams are arranged between the frame body vertical beams arranged in parallel along the transverse direction, and the frame body auxiliary vertical beams are located at the positions near the ends of the basket for the prestressed secondary tensioning of the cover beam; the two ends of the frame body auxiliary vertical beam are fixed to the corresponding frame top transverse beam and frame bottom transverse beam respectively, the long longitudinal beam is fixed to the corresponding frame body vertical beam or corresponding frame body auxiliary vertical beam at the far end, and the short longitudinal beam is fixed to the frame body vertical beam at the near end, corresponding frame body auxiliary vertical beam or corresponding frame top transverse beam.

[0013] Frame bottom auxiliary longitudinal beams are further arranged in parallel between the frame bottom longitudinal beams, and the two ends of the frame bottom auxiliary longitudinal beam are fixed to the corresponding frame bottom transverse beam.

[0014] Further, the rollover prevention beam assembly further comprises an outer cylinder beam, the rollover prevention beam is sleeved in the outer cylinder beam and can be driven to reciprocate along the longitudinal direction; the outer cylinder beam is hinged to the basket and can swing along the vertical plane;

[0015] In the use state, the rollover prevention beam is driven to slide towards the bottom of the cover beam, and the outer cylinder beam is driven to swing so that the rollover prevention beam abuts against the lower surface of the cover beam, and the inner side end of the rollover prevention beam is locked to the basket.

[0016] Further, a tensioning vertical beam is fixedly arranged upward from the overlapping longitudinal beam, a tensioning longitudinal beam is arranged at the top of the tensioning vertical beam and extends towards the opposite direction; in the use state, the tensioning longitudinal beam is applied with a longitudinal tension force towards the opposite direction.

[0017] The fixed connection between the overlapping longitudinal beam and the basket is a detachable fixed connection.

[0018] Further, the top end of the tension vertical beam and the distal end of the basket are further provided with a tension inclined beam;

[0019] The tension longitudinal beam is inclined at a small upward angle towards the opposite direction.

[0020] Further, the tension fixing assembly further comprises a tension horizontal beam and a tension inclined rod;

[0021] The end of the overlapping longitudinal beam forms an end opening clamping groove, the tension horizontal beam is clamped in the clamping groove in the longitudinal direction, one end of the tension inclined rod which can swing in the vertical plane in the longitudinal direction is hinged to the bottom of the basket, and the other end is detachably connected to the tension horizontal beam after passing through the through hole on the tension horizontal beam, and forms a tension reinforcement to the bottom of the basket;

[0022] The tension longitudinal beam is an I-beam, the tension member is an I-beam, and the tension member and the tension longitudinal beam are connected by steel plates attached to both sides of the web and a plurality of groups of bolts;

[0023] Alternatively, the tension longitudinal beam is an I-beam, the tension member is two strip-shaped steel plates attached to both sides of the web of the tension longitudinal beam, and the tension member and the tension longitudinal beam are connected by a plurality of groups of bolts.

[0024] The operation platform for secondary tensioning of the bent cap of the present application has the following beneficial effects: during construction, the hanging basket is hoisted into position by using the weight of the hanging basket structure itself, combined with opposite tensioning, the installation of the operation platform into position can be completed, the overall anchoring damage to the bent cap is not required, the construction period is relatively short, the construction efficiency is greatly improved, the secondary tensioning of the bent cap can be efficiently and timely performed after the box girder is positioned, compared with the prior art, the safety level is improved, the construction cost is reduced, and the overall quality of the bent cap is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0025] The present application will be further described below in combination with the drawings and examples.

[0026] Figure 1 It is a vertical plane schematic view of the hanging basket during construction.

[0027] Figure 2 It is a plan view of the hanging basket during construction.

[0028] Figure 3 It is an enlarged view of A of Figure 1

[0029] Figure 4 It is an enlarged view of B of Figure 1

[0030] Figure 5 ​​is an enlarged view of C of Figure 1 is an enlarged view of D of

[0031] Figure 6 is an enlarged view of D of Figure 2 is an enlarged view of D of

[0032] Figure 7 is a schematic view of the basket structure. DETAILED DESCRIPTION

[0033] As shown in the figure: the operation platform for secondary tensioning of the bent cap of the embodiment, the operation platform is composed of a hanging basket 5, the hanging basket 5 includes a basket 501 and a lap longitudinal beam, the lap longitudinal beam is fixedly connected to the basket and extends to the upper surface of the bent cap in the longitudinal direction; in the use state, the hanging basket is applied with a counteracting tension and the basket 501 is fixed to the end of the bent cap 1, at this time, the lower surface of the lap longitudinal beam is attached to the upper surface of the bent cap; in the actual construction, the most ideal way to apply the counteracting tension to the hanging basket is to set the same hanging basket in the counteracting direction and apply the counteracting tension to each other; of course, it is not excluded that the tension is applied to be fixed by using a certain structure on the bent cap, which will not be described here;

[0034] In the construction, the best way to apply the tension is that two hanging baskets 5 are respectively located at the two ends (in the longitudinal direction) of the bent cap 1, and the counteracting tension is formed between the two hanging baskets 5 through a tensioning piece 4, the tensioning piece 4 is suspended and located between the two box girders on the two sides of the bent cap;

[0035] That is, the operation platform of the application is used for the secondary prestressed tensioning on the bent cap 1, and the best operation mode comprises the following steps:

[0036] a1 hoisting two hanging baskets 5 for forming the operation platform, the hoisting height of the two hanging baskets 5 corresponds to the two ends of the bent cap 1; the tensioning points of the prestressed secondary tensioning of the bent cap are located at the two ends of the bent cap, therefore, the two hanging baskets 5 are symmetrically hoisted at the two ends of the bent cap, and the operation platform is formed by using the operation mode of step a2; here, the two ends of the bent cap 1 refer to the two ends in the longitudinal direction of the bent cap (in the case that the longitudinal direction is not specially mentioned in the application, the longitudinal direction refers to the longitudinal direction of the bent cap), that is, corresponding to the transverse direction of the bridge, which will not be described here;

[0037] a2 two opposite tensioning of the two ends of the bent cap 1 corresponding to the two hangers 5, and the hangers 5 are fixed at the two ends of the bent cap 1 by the opposite tensioning and the gravity of the hangers 5 and the support of the longitudinal ends of the bent cap 1, to provide an operation platform for the secondary prestress tensioning of the bent cap; the tensioning member 4 for the opposite tensioning is suspended and located between the box girders on the two sides (transverse sides, corresponding to the longitudinal direction of the bridge) of the bent cap 1; from the structure, the two hangers 5 are respectively located at the two ends of the bent cap, the tensioning member 4 is tensioned between the two hangers 5, and under the conversion of the ends of the bent cap 1, the two hangers 5 form a longitudinal tensioning component force by the gravity thereof and form the opposite tensioning with each other through the tensioning member 4, and the gravity of the hangers and the support of the ends of the bent cap are combined, that is, the fixing force of the hangers 5 is formed, the stability of the hangers is ensured, and thus the operation platform for the secondary prestress tensioning is formed; the opposite tensioning refers to that the two hangers 5 respectively apply opposite tensioning forces to each other, which will not be described herein; the structure of the opposite tensioning enables the platform system to be fixed and installed by itself without damaging the bent cap 1 to fix the hangers 5, and is convenient to disassemble and reassemble, has high utilization rate of repeated use, is beneficial to reducing the use cost, and improves the work efficiency;

[0038] b. The tensioning member 4 for the opposite tensioning of step a provides a safety belt safety suspension basis, and the box girder 2 is constructed in place on the bent cap; the tensioning member 4 can also be used for suspending a safety belt to ensure construction safety; the requirement that the existing technology cannot realize correct suspension of a safety belt for high-altitude and edge work is solved, and the safety risk is eliminated;

[0039] c. After the box girder 2 is all in place, the operation is performed on the tensioning platform, and the bent cap 1 is secondarily tensioned by prestress; the secondary prestress tensioning process and tensioning equipment all belong to the prior art, which will not be described herein; the tensioning equipment should be located on the operation platform before tensioning, which will not be described herein;

[0040] d. The secondary prestress tensioning is completed, and the operation platform is removed.

[0041] In the embodiment, the hanger 5 includes a basket 501 and a lapping longitudinal beam, and the lapping longitudinal beam includes a long longitudinal beam 502 fixed at one end to a far-end edge of the basket and extending to the upper surface of the bent cap after being in place and a short longitudinal beam 503 fixed at one end to a near-end edge of the basket and extending to the upper surface of the bent cap after being in place; in step a1, the lower surface of the lapping longitudinal beam is attached to the upper surface of the bent cap 1; the near end and the far end are relative to the bent cap 1, and the far end is the far end; the structure that the near end and the far end can both be provided with the longitudinal beam can ensure the stability of the support of the hanger, and the danger of falling is avoided; after the hanger 5 is in place, the lapping longitudinal beam is attached to the upper surface of the bent cap 1, has a certain hooking effect, and can be used to resist the overturning moment formed by the opposite tensioning, thereby being beneficial to maintaining the stability of the hanger 5;

[0042] In the embodiment, the short longitudinal beams 503 are arranged in parallel along the transverse direction near the middle part of the basket 501, and the long longitudinal beams 502 are arranged in parallel along the transverse direction on both sides of the short longitudinal beams 503; the overlapping longitudinal beams are fixedly connected with the overlapping transverse beams 504, and the lower surface of the overlapping transverse beam 504 is attached to the upper surface of the cover beam 1 in step a1; the adjacent overlapping longitudinal beams refer to the adjacent short longitudinal beams, the adjacent long longitudinal beams, and the adjacent long longitudinal beam and short longitudinal beam, which will not be described herein again; the two ends of the overlapping transverse beam are fixedly connected with the corresponding overlapping longitudinal beams by welding, forming a complete integrated structure; the short longitudinal beams 503 are arranged near the middle part of the basket 501 to avoid affecting the tensioning operation due to passing through the frame opening, which will not be described herein again.

[0043] In the embodiment, the lower surface of the overlapping longitudinal beam and the overlapping transverse beam 504 is roughened, and the roughening treatment can be performed in the existing manner, such as arranging a non-metallic material with a large friction coefficient, roughening the surface by marking lines, etc., and the non-metallic material is generally a detachable hard non-metallic material or a vulcanized rubber layer, etc., which will not be described herein again; the center of gravity of the basket is located on one side of the overlapping longitudinal beam, and the center of gravity of the entire basket can be adjusted by designing the overlapping longitudinal beam and the basket and cooperating with the arrangement of other components, such as lengthening the overlapping longitudinal beam, adding counterweights, etc., which will not be described herein again; the center of gravity is located in the range of the overlapping longitudinal beam, and in combination with the roughening treatment, the overlapping longitudinal beam further has the effect of a hook after the basket is installed, and has better installation stability.

[0044] In the embodiment, the anti-turning beam assembly 507 is arranged below the basket 501, and the anti-turning beam assembly includes at least two anti-turning beams 5072 arranged in parallel along the transverse direction; the anti-turning beams 5072 are driven to abut against the lower surface of the cover beam 1 to form a structure resisting the transverse turning of the basket 501 after tensioning in step a2; the arrangement of the two anti-turning beams 5072 can effectively resist the transverse turning of the basket, thereby further increasing the stability and safety of the basket; the driving mode of the anti-turning beam can be the existing mechanical driving mode, which can be manual driving, such as reciprocating movement of the anti-turning beam inside a sleeve, and the sleeve is fixed to the basket, which can be manually pushed out for use; or the anti-turning beam can be electrically driven by a motor to complete the above process, which will not be described herein again.

[0045] In the embodiment, the basket 501 comprises a support body, a frame body surrounding plate 5016 and a bottom plate 5017, the support body is a cuboid frame composed of frame bottom longitudinal beams 5012, frame bottom transverse beams 5013, frame body vertical beams 5011, frame top longitudinal beams 5014 and frame top transverse beams 5015, the bottom plate 5017 is fixed to the bottom of the cuboid frame to form the bottom of the operation platform, and the frame body surrounding plate 5016 is fixed between adjacent frame body vertical beams 5011 and leaves an operation position for the secondary tensioning of the cover beam prestress; as shown in the figure, two frame bottom longitudinal beams 5012 and two frame bottom transverse beams 5013 form a rectangular bottom frame, two frame top longitudinal beams 5014 and two frame top transverse beams 5015 form a rectangular top frame, and the four corners of the rectangular bottom frame and the rectangular top frame are fixedly connected through four frame body vertical beams 5011, thereby forming a cuboid frame; of course, in order to ensure the strength, some reinforcing beams can be additionally arranged on the frame, which will not be described herein again.

[0046] The long side of the cuboid frame is located in the transverse direction, and frame body auxiliary vertical beams 50111 are arranged between the transversely arranged frame body vertical beams 5011, and the frame body auxiliary vertical beams 50111 are located at the position of the secondary tensioning of the cover beam prestress at the proximal end of the basket 501, that is, the arrangement of the frame body auxiliary vertical beams 50111 should not interfere with the secondary tensioning construction, which will not be described herein again; the two ends of the frame body auxiliary vertical beams 50111 are fixed with the corresponding frame top transverse beams 5015 and frame bottom transverse beams 5013, respectively, the long longitudinal beams 502 are fixed with the corresponding frame body vertical beams 5011 at the distal end or the corresponding frame body auxiliary vertical beams 50111, as shown in the figure, the long longitudinal beams 502 are two, and the distal ends are fixed on the two frame body auxiliary vertical beams 50111; the corresponding ends of the long longitudinal beams are bent downward, the bent portions are overlapped with the inner side surfaces of the corresponding frame body auxiliary vertical beams 50111 and are detachably fixed or welded, the embodiment adopts detachable fixed connection, which has replaceability and is easy to transport and store; the short longitudinal beams 503 are fixed with the frame body vertical beams at the proximal end, the corresponding frame body auxiliary vertical beams or the corresponding frame top transverse beams; as shown in the figure, the ends of the short longitudinal beams 503 are bent downward, the bent portions are overlapped with the inner side surfaces of the corresponding frame body auxiliary vertical beams 50111 and are detachably fixed or welded, the embodiment adopts detachable fixed connection, which has replaceability and is easy to transport and store; of course, the frame body auxiliary vertical beams 50111 all adopt the same mark for description, the arrangement of the frame body auxiliary vertical beams 50111 at the cover beam side of the basket 501 should not interfere with the secondary tensioning construction, which will not be described herein again.

[0047] Frame bottom auxiliary longitudinal beams 50121 are also arranged between the frame bottom longitudinal beams 5012 in parallel, and the two ends of the frame bottom auxiliary longitudinal beams are fixed to the corresponding frame bottom transverse beams 5013; the frame bottom longitudinal beams 5012 are two and constitute two short sides of the rectangular bottom frame, in order to ensure the support strength, the frame bottom auxiliary longitudinal beams 50121 are arranged, which are generally welded, which will not be described herein again.

[0048] In the embodiment, the anti-rollover beam assembly 507 further comprises an outer cylinder beam 5071, the anti-rollover beam 5072 is sleeved in the outer cylinder beam and can be driven to reciprocate along the longitudinal direction; the outer cylinder beam 5071 is hinged to the basket 501 and can swing along the vertical plane, as shown in the figure, generally hinged to the corresponding auxiliary vertical beam of the basket, having sufficient strength; and the two anti-rollover beams 5072 are arranged transversely symmetrically to ensure the anti-rollover effect, which will not be described here again.

[0049] In step a2, the anti-rollover beam 5072 is driven to slide towards the bottom of the cover beam 1, and the outer cylinder beam 5071 is driven to swing by using the driving anti-rollover beam 5072 to make the anti-rollover beam abut against the lower surface of the cover beam 1, and the inner end of the anti-rollover beam 5072 is locked in the basket. As shown in the figure, in use, the anti-rollover beam 5072 slides outward, at the same time, the outer cylinder beam 5071 is driven to swing and swing to make the end of the anti-rollover beam 5072 abut against the bottom of the cover beam upward, locking the anti-rollover beam 5072 in the basket; the locking mode has various modes, generally using the bolt locking, that is, a bolt hole is formed on the position set on the anti-rollover beam 5072, a bolt is fixed on the bottom of the basket (generally on the auxiliary longitudinal beam of the frame bottom, ensuring the strength), after the swing is driven, the bolt hole is sleeved on the bolt and locked by the nut, which will not be described here again.

[0050] In the embodiment, the lap longitudinal beam is fixed and upwardly extended to be provided with a tension vertical beam 508, and the top of the tension vertical beam 508 is provided with a tension longitudinal beam 505 extending towards the opposite direction; in step a1, the tension longitudinal beams 505 between the baskets 501 located at both ends of the cover beam 1 are connected by the tension member 4 to form tension; as shown in the figure, the tension vertical beam 508 is fixed on the corresponding lap cross beam 504 and is stably supported by the support inclined beams arranged in four directions respectively

[0051] The fixed connection between the lap longitudinal beam (including the long longitudinal beam and the short longitudinal beam) and the basket 501 is detachable fixed connection, which is realized by using a bolt with a set size, which will not be described here again.

[0052] In the embodiment, the top end of the tension vertical beam 508 and the far end of the basket 501 are further fixedly provided with a tension inclined beam 506; the tension vertical beam and the basket frame are directly connected to ensure the integrity of the hanging basket and the stress coordination; as shown in the figure, the middle part of the basket is provided with a frame auxiliary longitudinal beam, the two ends are fixedly connected between the two frame top cross beams, the far end of the tension inclined beam 506 is bent and the bent part is overlapped on the frame auxiliary longitudinal beam and is detachably fixedly connected by a bolt, and the other end is fixed on the top of the tension vertical beam 508, forming a triangular stable tension structure.

[0053] The tensioning longitudinal beam 505 is inclined at a small angle upwardly towards the opposite direction; the tensioning longitudinal beam 505 is welded and fixed at the top end of the tensioning vertical beam 508, used for connecting with the tensioning member 4 to provide a structural basis for the opposite tensioning; the small angle inclination can be automatically leveled after tensioning to ensure that the tensioning force can fully act on the hanging basket; the inclination angle is generally not more than 3°, which will not be described here

[0054] In the embodiment, the tensioning fixing assembly 509 is also included, which comprises a tensioning cross beam 5091 and a tensioning inclined rod 5092;

[0055] The end of the lapping longitudinal beam (including a long longitudinal beam and a short longitudinal beam) forms an end opening clamping groove; the clamping groove can be an opening groove directly opened at the end of the lapping longitudinal beam, or can be formed by welding another component, which will not be described here; the tensioning cross beam 5091 is clamped in the clamping groove in the longitudinal direction; one end of the tensioning inclined rod 5092 which can swing in the vertical plane in the longitudinal direction is hinged to the bottom of the basket, and the other end is detachably connected to the tensioning cross beam 5091 after passing through the through hole of the tensioning cross beam, and forms tensioning reinforcement to the bottom of the basket; the detachable connection structure can adopt the mechanical structure connected in the prior art, which will not be described here; in the embodiment, the tensioning inclined rod 5092 is provided with external threads at the end of the tensioning cross beam 5091, and is locked by a nut after passing through; as shown in the figure, the tensioning inclined rod 5092 is two and symmetrically located on both sides of the bent beam in the transverse direction to form tensioning to the bottom of the basket, further increasing the integrity of the hanging basket and the reliability of the hanging basket.

[0056] As Figure 5 shown, the tensioning longitudinal beam 505 is an I-beam, the tensioning member 4 is an I-beam, and the tensioning member 4 and the tensioning longitudinal beam 505 are connected by steel plates attached to both sides of the web and by multiple groups of bolts; the structure is simple and stable after installation; of course, the tensioning longitudinal beam can also be an I-beam, and the tensioning member can be two strip-shaped steel plates attached to both sides of the web of the tensioning longitudinal beam and connected by multiple groups of bolts; the same can achieve the purpose of the application.

[0057] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting; although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. An operation platform for secondary tensioning of a bent cap, characterized in that: The operation platform is composed of a hanging basket, which comprises a basket and a lap longitudinal beam fixedly connected to the basket and extending to the upper surface of the cap beam in the longitudinal direction; in use, the basket is fixed to the end of the cap beam by applying a pulling force towards the opposite direction, and the lower surface of the lap longitudinal beam is attached to the upper surface of the cap beam; A tension vertical beam is arranged upwardly extending from the lap longitudinal beam, and a tension longitudinal beam is arranged extending towards the opposite direction at the top of the tension vertical beam; in use, the tension longitudinal beam is applied with a longitudinal pulling force towards the opposite direction; the top end of the tension vertical beam is fixedly connected to the far end of the basket with a tension inclined beam; A tension fixing assembly is further arranged, which comprises a tension horizontal beam and a tension inclined rod; The end of the lap longitudinal beam forms an open-end clamping groove, the tension horizontal beam is clamped in the clamping groove in the longitudinal direction, and one end of the tension inclined rod, which can swing in the vertical plane in the longitudinal direction, is hingedly connected to the bottom of the basket, and the other end is detachably connected to the tension horizontal beam after passing through the through hole on the tension horizontal beam, thereby forming a tension reinforcement for the bottom of the basket.

2. The operating platform for secondary tensioning of a bent cap according to claim 1, characterized in that: The lap longitudinal beam comprises a long longitudinal beam fixedly connected to the far end edge of the basket and extending to the upper surface of the cap beam after being positioned, and a short longitudinal beam fixedly connected to the near end edge of the basket and extending to the upper surface of the cap beam after being positioned.

3. The operating platform for secondary tensioning of a bent cap according to claim 2, characterized in that: The short longitudinal beam is arranged in plurality and arranged in parallel along the transverse direction near the middle of the basket, and the long longitudinal beam is arranged in plurality and arranged in parallel along the transverse direction on both sides of the plurality of short longitudinal beams; the lap horizontal beams are fixedly connected between the adjacent lap longitudinal beams, and the lower surface of the lap horizontal beam is attached to the upper surface of the cap beam in use.

4. The operating platform for secondary tensioning of a bent cap according to claim 3, characterized in that: The lower surfaces of the lap longitudinal beam and the lap horizontal beam are roughened; and the center of gravity of the hanging basket is located on one side of the lap longitudinal beam.

5. The operating platform for secondary tensioning of bent cap according to claim 3, characterized in that: A rollover prevention beam assembly is further arranged below the basket, which comprises at least two rollover prevention beams arranged in parallel along the transverse direction; after being tensioned towards the opposite direction, the rollover prevention beams are driven to abut against the lower surface of the cap beam to form a structure for resisting the lateral overturning of the basket.

6. The operating platform for the secondary tensioning of a bent cap, according to claim 3, characterized in that: The basket comprises a support body, a frame body surrounding plate and a bottom plate, the support body is a cuboid frame composed of a frame bottom longitudinal beam, a frame bottom horizontal beam, a frame body vertical beam, a frame top longitudinal beam and a frame top horizontal beam, the bottom plate is fixed to the bottom of the cuboid frame to form the bottom of the operation platform, and the frame body surrounding plate is fixed between the adjacent frame body vertical beams and leaves an operation position for the secondary tensioning of the cap beam prestress; The long side of the cuboid frame is located in the transverse direction, and a frame body auxiliary vertical beam is arranged between the transversely parallel frame body vertical beams and located at the near end of the basket to leave a position for the secondary tensioning of the cap beam prestress; the two ends of the frame body auxiliary vertical beam are respectively fixed to the corresponding frame top horizontal beam and frame bottom horizontal beam, the long longitudinal beam is fixed to the corresponding frame body vertical beam or corresponding frame body auxiliary vertical beam at the far end, and the short longitudinal beam is fixed to the frame body vertical beam, corresponding frame body auxiliary vertical beam or corresponding frame top horizontal beam at the near end; A frame bottom auxiliary longitudinal beam is further arranged in parallel between the frame bottom longitudinal beams, and the two ends of the frame bottom auxiliary longitudinal beam are respectively fixed to the corresponding frame bottom horizontal beam.

7. The operating platform for the secondary tensioning of a bent cap, according to claim 5, characterized in that: The anti-overturning beam assembly further comprises an outer cylinder beam, the anti-overturning beam is sleeved in the outer cylinder beam and can be driven to slide reciprocally along the longitudinal direction; the outer cylinder beam is hinged to the basket and can swing along a vertical plane; In the use state, the anti-overturning beam is driven to slide towards the bottom of the cover beam, and the outer cylinder beam is driven to swing so that the anti-overturning beam abuts against the lower surface of the cover beam, and the inner end of the anti-overturning beam is locked to the basket.

8. The operating platform for the secondary tensioning of a bent cap, according to claim 2, characterized in that: The fixed connection between the lapping longitudinal beam and the basket is detachable fixed connection.

9. The operating platform for the secondary tensioning of a bent cap, according to claim 5, characterized in that: The tensioning longitudinal beam is inclined at a small upward angle towards the opposite direction. The tensioning longitudinal beam is inclined at a small upward angle towards the opposite direction.

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