A railway box girder lowering system

Abstract

The present application relates to the technical field of bridge construction, and in particular to a railway box girder drop system, including a longitudinal deviation correction mechanism, a transverse deviation correction mechanism, and a beam drop mechanism; a plurality of longitudinal deviation correction mechanisms are symmetrically distributed along the longitudinal direction of the bridge between the piers of the box girder to be dropped; a plurality of transverse deviation correction mechanisms are symmetrically distributed along the transverse direction of the bridge between the piers of the box girder to be dropped; the longitudinal deviation correction mechanism includes a first temporary pier, a first slide, a first slide shoe, and a plurality of first jacking devices arranged in sequence from bottom to top, the first slide is fixedly connected to the first temporary pier, and a plurality of first jacking devices are fixed along the transverse direction of the bridge and symmetrically distributed on the first slide shoe; the transverse deviation correction mechanism includes a second temporary pier, a second slide, a second slide shoe, and a plurality of second jacking devices arranged in sequence from bottom to top, the second slide is fixedly connected to the second temporary pier, and a plurality of second jacking devices are fixed along the longitudinal direction of the bridge and symmetrically distributed on the second slide shoe. Through the above arrangement, the accuracy of the box girder drop position can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of bridge construction, and in particular to a railway box girder lowering system. Background Art

[0002] With the development and construction of cities and the increasing traffic volume, the number of municipal road construction projects has also increased. At this time, it is inevitable that municipal bridges will intersect or run parallel to high-speed rail lines. Due to the particularity and importance of high-speed rail lines, the municipal bridge construction process needs to ensure the absolute safety of high-speed rail line operations, which adds risks and difficulties to normal construction. Among them, for projects where beam bridges are constructed parallel to high-speed rail lines, because such bridges are high in height, large in span, and close to high-speed rail lines, top-pushing construction is often used. However, during the beam-dropping stage after the bridge is top-pushed into place, the bridge cannot be accurately dropped to the designed position due to construction errors.

[0003] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Summary of the invention

[0004] The purpose of the present application is to provide a railway box girder lowering system to solve or alleviate the problems existing in the above-mentioned prior art.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A railway box girder drop system, the drop system comprising a longitudinal deviation correction mechanism, a transverse deviation correction mechanism, and a drop mechanism;

[0007] A plurality of the longitudinal deviation correcting mechanisms are symmetrically distributed along the longitudinal direction of the bridge between the piers of the box beam to be dropped, and are used to adjust the position of the box beam to be dropped along the longitudinal direction of the bridge;

[0008] A plurality of the transverse deviation correcting mechanisms are symmetrically distributed between the piers of the box beam to be dropped along the transverse direction of the bridge, and are used to adjust the position of the box beam to be dropped along the transverse direction of the bridge;

[0009] A plurality of the beam-dropping mechanisms are symmetrically distributed on the piers on both sides of the box beam to be dropped along the transverse direction of the bridge, and are used to vertically adjust the position of the box beam to be dropped;

[0010] The longitudinal deviation correction mechanism comprises a first temporary buttress, a first slideway, a first sliding shoe and a plurality of first lifting devices arranged in sequence from bottom to top, the first slideway is fixedly connected to the first temporary buttress, the plurality of first lifting devices are fixed along the transverse direction of the bridge and symmetrically distributed on the first sliding shoe, and the first sliding shoe and the first slideway are slidably matched along the longitudinal direction of the bridge;

[0011] The lateral deviation correction mechanism includes a second temporary pier, a second slide, a second slide shoe and a plurality of second lifting devices which are arranged in sequence from bottom to top. The second slide is fixedly connected to the second temporary pier. The plurality of second lifting devices are fixed and symmetrically distributed on the second slide shoe along the longitudinal direction of the bridge. The second slide shoe and the second slide are slidably matched with each other along the transverse direction of the bridge.

[0012] In the railway box girder dropping system as described above, preferably, the two longitudinal deviation correcting mechanisms are symmetrically arranged along the longitudinal direction of the bridge between the piers of the box girder to be dropped.

[0013] In the railway box girder dropping system as described above, preferably, the two transverse deviation correcting mechanisms are symmetrically arranged along the transverse direction of the bridge between the piers of the box girder to be dropped.

[0014] In the railway box girder lowering system as described above, preferably, the first temporary piers of the two longitudinal deviation-correcting mechanisms and the second temporary piers of the two transverse deviation-correcting mechanisms are cross-distributed in a tic-tac-toe pattern.

[0015] In the railway box girder lowering system as described above, preferably, a first bracket is fixedly provided on the top of the first jacking device; and a second bracket is fixedly provided on the top of the second jacking device.

[0016] In the railway box girder lowering system as described above, preferably, the tops of the plurality of first jacking devices are fixedly connected to the same first bracket; and the tops of the plurality of second jacking devices are fixedly connected to the same second bracket.

[0017] In a railway box girder lowering system as described above, preferably, the beam lowering mechanism includes a third jacking device, a plurality of the third jacking devices are arranged at intervals on the piers where the box girder is to be lowered, and the plurality of the third jacking devices are symmetrically distributed on the piers along the longitudinal direction of the bridge.

[0018] In the above-mentioned railway box girder dropping system, preferably, the beam dropping mechanism further includes a first pad and a second pad;

[0019] The first pads are arranged in plurality at intervals on the pier of the box girder to be dropped;

[0020] A plurality of the first pads are symmetrically distributed on the pier along the longitudinal direction of the bridge, and are used to directly support the top box girder to be dropped;

[0021] A plurality of the second pads are arranged at intervals on the pier of the box girder to be dropped, and the plurality of the second pads are arranged one by one at the bottom of the third jacking device;

[0022] The first pad and the second pad each include a plurality of pad units vertically and continuously arranged.

[0023] In the railway box girder lowering system as described above, preferably, rubber pads are further provided at the bottom of the first pad and the top of the third jacking device.

[0024] Compared with the closest prior art, the technical solution of the embodiment of the present application has the following beneficial effects:

[0025] By setting up longitudinal and transverse correction devices, the box girder to be dropped can be corrected longitudinally and transversely to improve the accuracy of the box girder drop position. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. Among them:

[0027] Figure 1 A schematic diagram of the plan layout of a railway box girder drop system provided according to some embodiments of the present application;

[0028] Figure 2 A schematic diagram of a cross-section along the bridge direction of a railway box girder lowering system provided according to some embodiments of the present application.

[0029] Description of reference numerals:

[0030] 1. Bridge pier; 2. First temporary pier; 3. Second temporary pier; 4. Box girder; 5. Support; 6. Pad stone; 7. First slide; 8. Second slide; 9. First slide shoe; 10. Second slide shoe; 11. First lifting device; 12. Second lifting device; 13. Third lifting device; 14. First pad; 15. Second pad; 16. First bracket; 17. Second bracket; 18. Rubber pad. DETAILED DESCRIPTION

[0031] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present application and does not limit the present application. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present application without departing from the scope or spirit of the present application. For example, a feature shown or described as a part of an embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desired that the present application includes such modifications and variations within the scope of the appended claims and their equivalents.

[0032] In the following description, the terms "first / second / third" involved are merely used to distinguish similar objects and do not represent a specific ordering of the objects. It can be understood that "first / second / third" can be interchanged with a specific order or sequence where permitted, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present disclosure belongs. The terms used herein are only for the purpose of describing the embodiments of the present disclosure and are not intended to limit the present disclosure.

[0034] In the description of the present application, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present application and do not require that the present application must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present application. The terms "connected", "connected", and "set" used in the present application should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a direct connection or an indirect connection through an intermediate component; it can be a wired electrical connection, a radio connection, or a wireless communication signal connection. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0035] For the sake of clarity, the following terms are explained:

[0036] Along the bridge direction: along the extension direction of the bridge, that is, the direction of the bridge, which is also the longitudinal direction in this article;

[0037] Transverse direction of bridge: the horizontal direction perpendicular to the extension of the bridge, which is also the horizontal direction in this article.

[0038] The following will be combined with the attached Figure 1-2 A railway box girder 4 drop beam system of the present application is further described in detail.

[0039] A railway box girder 4 beam dropping system, the beam dropping system comprising a longitudinal deviation correction mechanism, a transverse deviation correction mechanism, and a beam dropping mechanism;

[0040] A plurality of longitudinal deviation correcting mechanisms are symmetrically distributed along the longitudinal direction of the bridge between the piers 1 of the box beam 4 to be dropped, and are used to adjust the position of the box beam 4 to be dropped along the longitudinal direction of the bridge;

[0041] A plurality of transverse deviation correcting mechanisms are symmetrically distributed between the piers 1 of the box beam 4 to be dropped along the transverse direction of the bridge, and are used to adjust the position of the box beam 4 to be dropped along the transverse direction of the bridge;

[0042] A plurality of beam-dropping mechanisms are symmetrically distributed on the piers 1 on both sides of the box beam 4 to be dropped along the transverse direction of the bridge, and are used to adjust the position of the box beam 4 to be dropped vertically;

[0043] The longitudinal deviation correction mechanism includes a first temporary buttress 2, a first slideway 7, a first slide shoe 9 and a plurality of first jacking devices 11 which are arranged in sequence from bottom to top. The first slideway 7 is fixedly connected to the first temporary buttress 2. The plurality of first jacking devices 11 are fixed and symmetrically distributed on the first slide shoe 9 along the transverse direction of the bridge. The first slide shoe 9 and the first slideway 7 are slidably matched along the longitudinal direction of the bridge.

[0044] The lateral deviation correction mechanism includes a second temporary pier 3, a second slide 8, a second slide shoe 10 and a plurality of second lifting devices 12 which are arranged in sequence from bottom to top. The second slide 8 is fixedly connected to the second temporary pier 3. The plurality of second lifting devices 12 are fixed and symmetrically distributed on the second slide shoe 10 along the longitudinal direction of the bridge. The second slide shoe 10 and the second slide 8 are slidably matched with each other along the transverse direction of the bridge.

[0045] In a specific embodiment of the present application, the first temporary pier 2 is fixedly arranged between the piers 1 on both sides of the box girder 4 to be dropped along the longitudinal direction of the bridge, and multiple first temporary piers 2 are symmetrically distributed along the longitudinal direction of the bridge; the second temporary pier 3 is fixedly arranged between the piers 1 on both sides of the box girder 4 to be dropped along the transverse direction of the bridge, and multiple second temporary piers 3 are symmetrically distributed along the transverse direction of the bridge; the first temporary pier 2 and the second temporary pier 3 adopt a steel pipe column structure, and 4×3703 steel and 5×3703 steel are used as distribution beams on the top. The distribution beam is provided with stiffening ribs at the top of the steel pipe column. It is fully welded to the steel pipe column; each slide is 17 meters long and is made into 7 sections for the convenience of lifting and transportation. The two sections are connected by pins and screws to form a flat surface. The slide height is set to 800mm. The first slide 7 and the second slide 8 are welded and fixed on the distribution beams on the top of the first temporary pier 2 and the second temporary pier 3 respectively; the slide shoe is welded by I-beam, middle connecting steel plate, end plate, side plate and top and bottom plates. The steel plate at the bottom of the slide shoe forms a groove with an MGE slide plate embedded in it, which is connected to the bottom plate of the slide shoe by bolts. In addition to the reinforcement function, the sliding shoe side plates also play a guiding and correcting role. The first sliding shoe 9 and the second sliding shoe 10 are respectively connected to the first slide 7 and the second slide 8 through the grooves at their lower parts. Two pushing jacks are provided at both ends of the first sliding shoe 9 and the second sliding shoe 10, which are respectively used to push the first sliding shoe 9 and the second sliding shoe 10 along the first slide 7 and the second slide 8; the top of the first sliding shoe 9 is detachably fixed along the transverse bridge direction and has two first lifting devices 11 symmetrically distributed, and the top of the second sliding shoe 10 is detachably fixed along the transverse bridge direction and has two second lifting devices 12 symmetrically arranged.

[0046] In actual use, after the box girder 4 moves to the top of the corresponding pier 1, the box girder 4 to be dropped is first supported by the beam dropping device, and the corresponding correction direction and correction distance are determined according to the positional relationship between the bottom support 5 of the box girder 4 and the top pad stone 6 of the pier 1. Taking the longitudinal correction as an example, the pushing jacks at both ends of the first slide shoe 9 on the longitudinal correction mechanism are started to move the first slide shoe 9 to the appropriate position at the bottom of the box girder 4 to be dropped, and then the first lifting device 11 is started to lift the box girder 4 to be dropped until the box girder 4 is detached from the beam dropping device, and then according to the previously determined correction direction and correction distance, the pushing jacks at both ends of the first slide shoe 9 are started again until the bottom support 5 of the box girder 4 and the top pad stone 6 of the pier 1 are accurately corresponding.

[0047] Two longitudinal deviation-correcting mechanisms are symmetrically arranged along the longitudinal direction of the bridge between the piers 1 of the box girder 4 to be dropped.

[0048] Two transverse deviation correcting mechanisms are symmetrically arranged along the transverse direction of the bridge between the piers 1 of the box girder 4 to be dropped.

[0049] The first temporary buttresses 2 of the two longitudinal deviation-correcting mechanisms and the second temporary buttresses 3 of the two transverse deviation-correcting mechanisms are cross-distributed in a tic-tac-toe pattern.

[0050] In a specific embodiment of the present application, the two first temporary piers 2 and the two second temporary piers 3 are cross-distributed in a tic-tac-toe structure between the piers 1 on both sides of the box girder 4 to be dropped to enhance the structural stability, and the first slides 7 on the two temporary piers and the second slides 8 on the two second temporary piers 3 are only correspondingly distributed on the U-shaped structure of the above-mentioned tic-tac-toe structure to avoid mutual influence.

[0051] A first bracket 16 is fixedly disposed on the top of the first jacking device 11 ; a second bracket 17 is fixedly disposed on the top of the second jacking device 12 .

[0052] In a specific embodiment of the present application, the first bracket 16 is a 5 cm thick rubber plate, which can increase the contact area between the first jacking device 11 and the box beam 4 on the one hand, ensuring that the bottom of the box beam 4 is evenly stressed, and on the other hand, the rubber plate also has good anti-slip and shock-absorbing effects, so as to achieve the effect of the longitudinal correction mechanism; the second bracket 17 is a 5 cm thick rubber plate, which can increase the contact area between the second jacking device 12 and the box beam 4 on the one hand, ensuring that the bottom of the box beam 4 is evenly stressed, and on the other hand, the rubber plate also has good anti-slip and shock-absorbing effects, so as to achieve the effect of the transverse correction mechanism.

[0053] The tops of the plurality of first jacking devices 11 are fixedly connected to the same first bracket 16 ; the tops of the plurality of second jacking devices 12 are fixedly connected to the same second bracket 17 .

[0054] In a specific embodiment of the present application, the tops of the two first jacking devices 11 are fixedly connected to the bottom of the same first bracket 16, and the tops of the two second jacking devices 12 are fixedly connected to the bottom of the same first bracket 16, so as to enhance the synchronization effect between the two first jacking devices 11 and the two second jacking devices 12, and further increase the contact area with the bottom of the box girder 4, thereby improving the stability of the jacking effect of the first jacking device 11 and the second jacking device 12.

[0055] The beam dropping mechanism comprises a third jacking device 13. A plurality of third jacking devices 13 are arranged at intervals on the pier 1 where the box beam 4 to be dropped is located. The plurality of third jacking devices 13 are symmetrically distributed on the pier 1 along the longitudinal direction of the bridge.

[0056] In a specific embodiment of the present application, two third jacking devices 13 are arranged at intervals on the piers 1 on both sides of the box girder 4 to be dropped, and the two third jacking devices 13 are symmetrically distributed on the corresponding piers 1 along the direction of the bridge. The two third jacking devices 13 are specifically arranged on the side of the pad stone 6 of the corresponding pier 1 close to the box girder 4 to be dropped.

[0057] In actual use, after the box girder 4 moves to above the corresponding pier 1, the box girder 4 to be dropped is supported by the third jacking device 13 on the piers 1 on both sides.

[0058] The beam dropping mechanism further includes a first pad 14 and a second pad 15;

[0059] A plurality of first pads 14 are arranged at intervals on the pier 1 of the box girder 4 to be dropped;

[0060] A plurality of first pads 14 are symmetrically distributed on the pier 1 along the longitudinal direction of the bridge, and are used to directly support the top box girder 4 to be dropped;

[0061] A plurality of second pads 15 are arranged at intervals on the pier 1 of the box girder 4 to be dropped, and the plurality of second pads 15 are arranged one by one at the bottom of the third jacking device 13;

[0062] The first pad 14 and the second pad 15 each include a plurality of pad units that are vertically and continuously arranged.

[0063] In a specific embodiment of the present application, the pad unit is a 10 mm thick steel plate, and two first pads 14 are arranged at intervals on the piers 1 on both sides of the box girder 4 to be dropped, and the two first pads 14 are symmetrically distributed on the corresponding piers 1 along the direction of the bridge, and the two first pads 14 are specifically arranged between the two third jacking devices 13 on the same pier 1; two second pads 15 are arranged at intervals on the pier 1 of the box girder 4 to be dropped, and the two second pads 15 are arranged one by one at the bottom of the two third jacking devices 13.

[0064] In actual use, after the deviation correction of the box girder 4 to be dropped is completed, the third jacking device 13 is started to support the box girder 4 and the longitudinal deviation correction mechanism and the transverse deviation correction mechanism are removed, and the third jacking devices 13 on the piers 1 on both sides of the box girder 4 to be dropped synchronously fall until the first pads 14 on the piers 1 on both sides take over the support, and the pad units at the bottom of the third jacking devices 13 on the piers 1 on both sides are removed synchronously, and then the third jacking device 13 is restarted to support the box girder 4, and the pad units at the top of the first pads 14 on the piers 1 on both sides are removed synchronously, and the cycle is repeated until the box girder 4 falls onto the piers 1 on both sides.

[0065] A rubber pad 18 is further provided at the bottom of the first pad 14 and the top of the third jacking device 13 .

[0066] In the specific embodiment of the present application, the rubber pad 18 is specifically 5 cm thick and has good anti-slip and shock-absorbing effects. On the one hand, it can enhance the stability of the jacking effect of the third jacking device 13, and on the other hand, it can also enhance the supporting stability of the first pad 14.

[0067] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A railway box girder lowering system, characterized in that: The beam dropping system includes a longitudinal deviation correction mechanism, a transverse deviation correction mechanism, and a beam dropping mechanism; A plurality of the longitudinal deviation correcting mechanisms are symmetrically distributed along the longitudinal direction of the bridge between the piers of the box beam to be dropped, and are used to adjust the position of the box beam to be dropped along the longitudinal direction of the bridge; A plurality of the transverse deviation correcting mechanisms are symmetrically distributed between the piers of the box beam to be dropped along the transverse direction of the bridge, and are used to adjust the position of the box beam to be dropped along the transverse direction of the bridge; A plurality of the beam-dropping mechanisms are symmetrically distributed on the piers on both sides of the box beam to be dropped along the transverse direction of the bridge, and are used to vertically adjust the position of the box beam to be dropped; The longitudinal deviation correction mechanism comprises a first temporary buttress, a first slideway, a first sliding shoe and a plurality of first lifting devices arranged in sequence from bottom to top, the first slideway is fixedly connected to the first temporary buttress, the plurality of first lifting devices are fixed along the transverse direction of the bridge and symmetrically distributed on the first sliding shoe, and the first sliding shoe and the first slideway are slidably matched along the longitudinal direction of the bridge; The lateral deviation correction mechanism includes a second temporary pier, a second slide, a second slide shoe and a plurality of second lifting devices which are arranged in sequence from bottom to top. The second slide is fixedly connected to the second temporary pier. The plurality of second lifting devices are fixed and symmetrically distributed on the second slide shoe along the longitudinal direction of the bridge. The second slide shoe and the second slide are slidably matched with each other along the transverse direction of the bridge.

2. A railway box girder lowering system as claimed in claim 1, characterized in that: The two longitudinal deviation correcting mechanisms are symmetrically arranged along the direction of the bridge between the piers of the box girder to be dropped.

3. A railway box girder lowering system as claimed in claim 2, characterized in that: The two transverse deviation correcting mechanisms are symmetrically arranged along the transverse direction of the bridge between the piers of the box girder to be dropped.

4. A railway box girder lowering system as claimed in claim 3, characterized in that: The first temporary buttresses of the two longitudinal deviation-correcting mechanisms and the second temporary buttresses of the two transverse deviation-correcting mechanisms are cross-distributed in a tic-tac-toe shape.

5. The railway box girder lowering system according to claim 1, characterized in that: A first bracket is fixedly arranged on the top of the first jacking device; and a second bracket is fixedly arranged on the top of the second jacking device.

6. A railway box girder lowering system as claimed in claim 5, characterized in that: The tops of the plurality of first jacking devices are fixedly connected to the same first bracket; the tops of the plurality of second jacking devices are fixedly connected to the same second bracket.

7. The railway box girder lowering system according to claim 1, characterized in that: The beam-dropping mechanism comprises a third jacking device, and a plurality of the third jacking devices are arranged at intervals on the pier where the box beam is to be dropped, and the plurality of the third jacking devices are symmetrically distributed on the pier along the longitudinal direction of the bridge.

8. A railway box girder lowering system as claimed in claim 7, characterized in that: The beam dropping mechanism also includes a first pad and a second pad; The first pads are arranged in plurality at intervals on the pier of the box girder to be dropped; A plurality of the first pads are symmetrically distributed on the pier along the longitudinal direction of the bridge, and are used to directly support the top box girder to be dropped; A plurality of the second pads are arranged at intervals on the pier of the box girder to be dropped, and the plurality of the second pads are arranged one by one at the bottom of the third jacking device; The first pad and the second pad each include a plurality of pad units vertically and continuously arranged.

9. A railway box girder lowering system as claimed in claim 8, characterized in that: The bottom of the first pad and the top of the third jacking device are also provided with rubber pads.

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