A bridge erecting machine support leg arranged on a bent cap to provide complex stress
By adopting a combination structure of pre-embedded components and inclined support mechanisms on the outriggers of the bridge erecting machine, the stability problem of the bridge erecting machine under complex stress environment is solved, enabling rapid installation and efficient lateral movement, saving construction time and labor costs.
Patent Information
- Application Number
- CN202522451957.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-19
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-11-19
AI Technical Summary
Existing technologies cannot guarantee the stability of bridge erecting machines during the whole-span installation process, especially when the machine is heavy and subjected to complex and variable forces. Traditional support methods cannot meet the overall stability requirements of the bridge erecting machine.
The system adopts a leg structure consisting of lower legs and upper crossbeams. It is fixed to the cap beam through pre-embedded components and provides support in combination with an inclined support mechanism. Adjustable inclined bracing rods and jacks are used to drive the transverse base, thereby achieving stable support and lateral movement of the main beam of the bridge erecting machine.
This achievement ensures the stability and reliability of the bridge erecting machine under complex stress conditions, shortens installation time, reduces labor requirements, and saves construction time and human resources.
Smart Images
Figure CN224943032U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of bridge erecting machine maintenance, and in particular to a bridge erecting machine support leg installed on the cap beam to provide complex stress distribution. Background Technology
[0002] Currently, larger bridge erecting machines in China use outriggers supported on the cap beams and precast beams to ensure stability. Outrigger 1 is placed on the front cap beam, outrigger 2 on the beam surface, and outrigger 3 on the rear beam surface.
[0003] The bridge erecting machine faced the following challenges during the installation of a 100m steel-concrete composite beam across the entire span: (1) The bridge erecting machine has a large overall height of 26m, and the overall stability cannot be guaranteed by conventional methods; (2) The bridge erecting machine has a large overall weight and complex and variable stress conditions, making it difficult to maintain the stability of the bridge erecting machine using traditional methods; the main stress conditions are as follows: ①The bridge erecting machine has a heavy self-weight, with an overall self-weight of 1850t; ②The bridge erecting machine has a heavy lifting capacity. The bridge erecting machine needs to use front and rear trolleys to lift steel beams weighing 700m. The trolleys move horizontally and vertically on the main beam continuously, and the outriggers are subjected to complex forces. ③ The main beam of the bridge erecting machine has a self-weight of 1100t. It can lift a 700t steel beam and move a 1800t weight laterally for a long time on the upper part of the outriggers. ④ When the bridge erecting machine passes through the span, there is a long cantilever state, and the outriggers bear all the dead load, which is constantly changing. Summary of the Invention
[0004] The purpose of this utility model is to address the shortcomings of the prior art by providing a support leg for a bridge erecting machine that is installed on a cap beam to provide complex stress. This support leg consists of a lower support leg and an upper crossbeam. The lower support leg is connected and fixed to the pre-embedded components in the cap beam and supported by an inclined support mechanism, which can provide effective support for the bridge erecting machine.
[0005] The objective of this utility model is achieved through the following technical solution: A bridge erecting machine support leg, installed on a cap beam to provide complex stress distribution, comprises two sets of legs, serving as the No. 2 and No. 3 support legs of the bridge erecting machine, respectively. Each set of legs is installed on two laterally arranged cap beams. Each set of legs includes two lower legs and an upper crossbeam. The tops of the two lower legs in each set are connected to both ends of the upper crossbeam. An embedded component is provided within the cap beam, and an installation groove for installing an extended precision-rolled threaded steel connector is provided at the top of the cap beam. The embedded component is connected to the bottom of the lower legs via the extended precision-rolled threaded steel connector. Anchoring; the pre-embedded components are provided in multiple sets, each set of pre-embedded components includes multiple pre-embedded components, each pre-embedded component includes a precision-rolled threaded steel bar, a precision-rolled threaded steel bar connector, a pre-embedded steel plate and a nut, the nut is installed in the mounting hole at the center of the pre-embedded steel plate, the top end of the precision-rolled threaded steel bar extends into the mounting groove of the cap beam, the bottom end passes through the nut and is connected to the precision-rolled threaded steel bar connector, the top end of the precision-rolled threaded steel bar is connected to the bottom end of the extended precision-rolled threaded steel bar through the extended precision-rolled threaded steel bar connector, and the precision-rolled threaded steel bar connector abuts against the bottom of the pre-embedded steel plate and the nut.
[0006] The lower support leg is supported by an inclined support mechanism, which includes a top inclined support mechanism and a middle inclined support mechanism. One end of the top inclined support mechanism is connected to the top of the lower support leg and the other end is connected to the top of the steel beam. One end of the middle inclined support mechanism is connected to the middle of the lower support leg and the other end is connected to the top of the cap beam.
[0007] Each of the aforementioned inclined support mechanisms includes an inclined brace and an ear plate. The inclined brace is a telescopic structure. The two ends of the inclined brace of the top inclined support mechanism are respectively hinged to the lug fixed on the top of the steel beam and the ear plate fixed on the top of the lower support leg. The two ends of the inclined brace of the middle inclined support mechanism are respectively hinged to the base fixed on the top of the cover beam and the ear plate fixed in the middle of the lower support leg.
[0008] The diagonal brace includes an adjustable inner thread and two diagonal bracing steel components. The two ends of the adjustable inner thread are respectively threaded to the interior of the two diagonal bracing steel components.
[0009] The outer wall of the precision-rolled threaded steel bar is provided with a spiral stiffener.
[0010] The pre-embedded components in each group are arranged in a rectangular shape.
[0011] The upper crossbeam has two transverse bases along its transverse direction. The transverse bases are used to support the main beam of the girder erecting machine. The transverse bases are driven by transverse jacks. The cylinder of the transverse jack is fixed to the upper crossbeam through a movable fixing device, and the telescopic rod is connected to the transverse base.
[0012] The advantages of this utility model are: (1) Provide complex support for the outriggers through embedded parts; (2) Adjustable diagonal bracing connects the legs to the steel beams and cap beams, providing support and ensuring stability. The adjustable length allows it to be used in various environments. (3) The crossbeams on the upper part of the outriggers can provide a transverse guide for the bridge erecting machine, and the jacks provide support; the integral structure is connected laterally by the main beam, which can ensure the lateral stability of the main beam of the bridge erecting machine. (4) Convenient and quick, the outrigger installation can be completed within 4 hours, saving 1 day for each steel beam, for a total of 40 steel beams, resulting in a total saving of 40 days of construction time and 200 manpower. Attached Figure Description
[0013] Figure 1 This is a longitudinal elevation view of the installation of the support leg of this utility model; Figure 2 for Figure 1 Enlarged view of A in the middle; Figure 3 for Figure 1 Enlarged view of B in the middle; Figure 4 This is a plan view of the installation of the support leg of this utility model; Figure 5 for Figure 4 Enlarged view of C; Figure 6 for Figure 4 Enlarged view of D; Figure 7 for Figure 4 Enlarged view of E in the middle; Figure 8 for Figure 4 Enlarged view of F in the middle; Figure 9 This is a horizontal elevation view of the installation of the No. 2 support leg of this utility model; Figure 10 for Figure 9 Enlarged view of G in the middle; Figure 11 This is a horizontal elevation view of the installation of the No. 3 support leg of this utility model; Figure 12 for Figure 11 Enlarged view of H in the middle; Figure 13 This is a schematic diagram of the structure of the embedded component of this utility model; like Figures 1-13 As shown in the figure, the markings represent: Embedded component 10, fine-rolled threaded steel bar 101, fine-rolled threaded steel bar connector 102, embedded steel plate 103, nut 104, spiral stiffener 105, lower support leg 20, inclined support mechanism 30, inclined brace tie rod 301, adjustable internal thread 3011, inclined brace steel component 3012, ear plate 302, base 303, lifting lug 304, cap beam 40, mounting groove 401, steel beam 50, upper crossbeam 60, main beam 70, transverse base 80, transverse jack 90, movable fixing device 100. Detailed Implementation
[0014] The features of this utility model and other related features will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate the understanding of those skilled in the art: Example: Figures 1-13As shown, this embodiment relates to a bridge erecting machine support leg installed on a cap beam to provide complex stress distribution. The support leg has two sets, serving as the No. 2 and No. 3 support legs of the bridge erecting machine, respectively, to support the main beam 70 of the machine. Each set of support legs is installed on two opposing transversely arranged cap beams 40. Each set of support legs includes two lower support legs 20 and an upper crossbeam 60. The tops of the two lower support legs 20 in each set are connected to both ends of the upper crossbeam 60, and the connection between the lower support legs 20 and the upper crossbeam 60 is detachable. A pre-embedded component 10 is provided inside the cap beam 40. An installation groove 401 for installing an extended precision-rolled threaded steel connector is provided on the top of the cap beam 40. The pre-embedded component 10 is fixed to the bottom of the lower support legs 20 via the extended precision-rolled threaded steel. Multiple sets of embedded components 10 are provided, and each set of embedded components 10 includes multiple embedded components 10. The number and position of the embedded components 10 can be adjusted according to the actual situation. Each embedded component 10 includes a threaded steel bar 101, a threaded steel bar connector 102, an embedded steel plate 103, and a nut 104. Both ends of the threaded steel bar 101 are provided with external threads. The threaded steel bar connector 102 is a sleeve with internal threads. The threaded steel bar 101 has a helical stiffener 105 along its middle outer wall, which can increase the pull-out resistance of the threaded steel bar 101. The nut 104 is welded into the mounting hole at the center of the embedded steel plate 103. The top of the nut 104 is flush with the top of the embedded steel plate 103, and the bottom is flush with the bottom of the embedded steel plate 103. The top end of the threaded steel bar 101 extends into the mounting groove 401 of the cap beam 40, and the bottom end passes through the nut 104 and is connected to the threaded steel bar connector 102. The top end of the threaded steel bar 101 passes through... The extended fine-rolled threaded steel connector is connected to the bottom end of the extended fine-rolled threaded steel. The fine-rolled threaded steel connector 102 abuts against the bottom of the embedded steel plate 103 and the nut 104. The structure of the fine-rolled threaded steel 101 is the same as that of the extended fine-rolled threaded steel, and the structure of the fine-rolled threaded steel connector 102 is the same as that of the extended fine-rolled threaded steel connector. The external thread at the bottom end of the fine-rolled threaded steel 101 mates with the internal threads of the fine-rolled threaded steel connector 102 and the nut 104. The internal thread of the extended fine-rolled threaded steel connector mates with the external threads at the top end of the fine-rolled threaded steel 101 and the bottom end of the extended fine-rolled threaded steel. The top end of the fine-rolled threaded steel 101 and the bottom end of the extended fine-rolled threaded steel abut against each other. The top end of the extended fine-rolled threaded steel is anchored to the anchor plate by the anchor nut. The anchor plate is installed on the bottom of the lower support leg 20. Correspondingly, the multiple embedded components 10 of each group of embedded components 10 are arranged in a rectangular shape to facilitate mating with the rectangular anchor plate.
[0015] like Figures 9-12As shown, the upper crossbeam 60 is provided with two transverse bases 80 along its transverse direction. The two transverse bases 80 are connected together by a connecting rod. The transverse bases 80 are used to support the main beam 70 of the beam erecting machine. The transverse bases 80 are driven by transverse jacks 90, which are controlled by a pump station. Each transverse base 80 corresponds to one transverse jack 90. The cylinder of the transverse jack 90 is fixed to the upper crossbeam 60 by a movable fixing device 100, and the telescopic rod is connected to the transverse base 80. The movable fixing device 100 is installed on the upper crossbeam 60 and can move laterally along the upper crossbeam 60. The movable fixing device 100 can be fixed to the upper crossbeam 60 (e.g., by means of pins or bolts). In this embodiment, the movable fixing device 100 is first fixed to the upper crossbeam 60, the telescopic rod of the transverse jack 90 extends to drive the transverse base 80 to move a certain distance, then the connection between the movable fixing device 100 and the upper crossbeam 60 is released, the transverse base 80 is fixed to the upper crossbeam 60, the telescopic rod of the transverse jack 90 retracts, and finally the above operation is repeated until the main beam 70 of the beam erecting machine is moved into place.
[0016] like Figures 2-3 As shown, the lower support leg 20 is supported by an inclined support mechanism 30, which includes a top inclined support mechanism and a middle inclined support mechanism. One end of the top inclined support mechanism is connected to the top of the lower support leg 20 and the other end is connected to the top of the steel beam 50. One end of the middle inclined support mechanism is connected to the middle of the lower support leg 20 and the other end is connected to the top of the cap beam 40. The top inclined support mechanism is provided in one set, and each set of top inclined support mechanism includes at least one top inclined support mechanism. The middle inclined support mechanism is provided in two sets, and each set of middle inclined support mechanism includes at least one middle inclined support mechanism. The two sets of middle inclined support mechanisms are respectively located on both longitudinal sides of the lower support leg 20. Each inclined support mechanism 30 includes an inclined brace 301 and an ear plate 302. The inclined brace 301 is a telescopic structure. Specifically, the inclined brace 301 includes an adjustable inner thread 3011 and two inclined brace steel components 3012. The two ends of the adjustable inner thread 3011 are respectively threaded to the inside of the two inclined brace steel components 3012. The external threads at both ends of the adjustable inner thread 3011 are respectively engaged with the internal threads of the two inclined brace steel components 3012. By adjusting the length of the adjustable inner thread 3011 in the inclined brace steel component 3012, the length of the inclined brace 301 can be adjusted. The two ends of the diagonal brace 301 of the top diagonal support mechanism are respectively hinged to the lug 304 fixed on the top of the steel beam 50 and the ear plate 302 fixed on the top of the lower support leg 20. The two ends of the diagonal brace 301 of the middle diagonal support mechanism are respectively hinged to the base 303 fixed on the top of the cover beam 40 and the ear plate 302 fixed in the middle of the lower support leg 20. The diagonal support mechanism 30 can support the lower support leg 20 to improve the support performance of the lower support leg 20.
[0017] The beneficial technical effects of this embodiment are as follows: (1) Provide complex support for the outriggers through embedded parts; (2) Adjustable diagonal bracing connects the legs to the steel beams and cap beams, providing support and ensuring stability. The adjustable length allows it to be used in various environments. (3) The crossbeams on the upper part of the outriggers can provide a transverse guide for the bridge erecting machine, and the jacks provide support; the integral structure is connected laterally by the main beam, which can ensure the lateral stability of the main beam of the bridge erecting machine. (4) Convenient and quick, the outrigger installation can be completed within 4 hours, saving 1 day for each steel beam, for a total of 40 steel beams, resulting in a total saving of 40 days of construction time and 200 manpower.
Claims
1. A bridge erecting machine support leg installed on a cap beam to provide complex stress distribution, characterized in that... The support legs are provided in two sets, serving as support legs No. 2 and No. 3 of the bridge erecting machine, respectively. Each set of support legs is installed on two horizontally arranged cap beams. Each set of support legs includes two lower support legs and one upper crossbeam. The tops of the two lower support legs in each set are connected to both ends of the upper crossbeam. A pre-embedded component is provided within the cap beam, and the top of the cap beam has an installation groove for installing an extended precision-rolled threaded steel connector. The pre-embedded component is anchored to the bottom of the lower support legs via the extended precision-rolled threaded steel. The pre-embedded component is equipped with… Multiple sets of embedded components are provided, each set including multiple embedded components. Each embedded component includes a precision-rolled threaded steel bar, a precision-rolled threaded steel bar connector, an embedded steel plate, and a nut. The nut is installed in the mounting hole at the center of the embedded steel plate. The top end of the precision-rolled threaded steel bar extends into the mounting groove of the cap beam, and the bottom end passes through the nut and is connected to the precision-rolled threaded steel bar connector. The top end of the precision-rolled threaded steel bar is connected to the bottom end of the extended precision-rolled threaded steel bar through the extended precision-rolled threaded steel bar connector. The precision-rolled threaded steel bar connector abuts against the bottom of the embedded steel plate and the nut.
2. The bridge erecting machine support leg provided on the cap beam to provide complex stress distribution as described in claim 1, characterized in that... The lower support leg is supported by an inclined support mechanism, which includes a top inclined support mechanism and a middle inclined support mechanism. One end of the top inclined support mechanism is connected to the top of the lower support leg and the other end is connected to the top of the steel beam. One end of the middle inclined support mechanism is connected to the middle of the lower support leg and the other end is connected to the top of the cap beam.
3. The bridge erecting machine support leg provided on the cap beam to provide complex stress distribution as described in claim 2, characterized in that... Each of the aforementioned inclined support mechanisms includes an inclined brace and an ear plate. The inclined brace is a telescopic structure. The two ends of the inclined brace of the top inclined support mechanism are respectively hinged to the lug fixed on the top of the steel beam and the ear plate fixed on the top of the lower support leg. The two ends of the inclined brace of the middle inclined support mechanism are respectively hinged to the base fixed on the top of the cover beam and the ear plate fixed in the middle of the lower support leg.
4. The bridge erecting machine support leg provided on the cap beam to provide complex stress distribution as described in claim 3, characterized in that... The diagonal brace includes an adjustable inner thread and two diagonal bracing steel components. The two ends of the adjustable inner thread are respectively threaded to the interior of the two diagonal bracing steel components.
5. A bridge erecting machine support leg provided on the cap beam to provide complex stress distribution as described in claim 1, characterized in that... The outer wall of the precision-rolled threaded steel bar is provided with a spiral stiffener.
6. The bridge erecting machine support leg provided on the cap beam to provide complex stress distribution as described in claim 1, characterized in that... The pre-embedded components in each group are arranged in a rectangular shape.
7. A bridge erecting machine support leg provided on the cap beam to provide complex stress distribution as described in claim 1, characterized in that... The upper crossbeam has two transverse bases along its transverse direction. The transverse bases are used to support the main beam of the bridge erecting machine. The transverse bases are driven by transverse jacks. The cylinder of the transverse jack is fixed to the upper crossbeam through a movable fixing device, and the telescopic rod is connected to the transverse base.