An integrated construction platform and construction method for assembled bridge

Abstract

The present invention provides an integrated construction platform for assembled bridges and a construction method, and relates to the technical field of bridge erection equipment. The integrated construction platform for assembled bridges includes a main beam and a front leg, the front leg is arranged on the main beam and is suitable for moving along the length direction of the main beam, the front leg includes a first column, a second column and a first crossbeam, the first crossbeam includes a first crossbeam body and a first groove structure, the first groove structure is arranged on the first crossbeam body, and the notch of the first groove structure is arranged toward the pier body, the first column is connected to the part of the first crossbeam body located on one side of the first groove structure, the second column is connected to the part of the first crossbeam body located on the other side of the first groove structure, and the first column and the second column are suitable for supporting on the pedestal. In the present invention, the front leg can meet the requirements of the pier body installation space and reduce the additional bending moment applied to the pedestal, so that the construction of the integrated construction platform is safer without affecting the assembly of the pier body.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge erection equipment, and in particular to an integrated construction platform and a construction method for an assembled bridge. Background Art

[0002] The construction of bridges can be divided into two parts: the construction of the lower supporting structure and the construction of the upper bridge deck structure. The lower supporting structure of the bridge, such as the pier, is mostly cast in place, which has a long construction period, is not as easy to control as the prefabricated one, is easily affected by the construction access road, and is also prone to damage to the environment. Therefore, prefabricated assembly construction of bridges has become a development trend.

[0003] After the pier body, pier top block, segmental box girder and other prefabricated bridge components are assembled at the construction site, the concrete between the pier body and the abutment needs about 3 days to be strengthened before the pier top block can be assembled, and the pier top block and the pier body also need about 3 days to be strengthened before the segmental box girder can be assembled. The strengthening between each link takes a lot of time. Therefore, in order to improve work efficiency, an integrated construction platform is usually used to increase the working surface for staggered construction, stagger the strengthening time with the assembly construction, and carry out other processes while strengthening a certain process.

[0004] The front legs of the existing integrated construction platform are usually supported on the pedestal of the pier body to be assembled. In order not to hinder the subsequent assembly of the pier body on the pedestal, it is necessary to have a sufficient distance between the supporting position of the front legs on the pedestal and the center position of the pedestal in the longitudinal direction of the bridge, so as to avoid the installation space of the pier body. Usually, the pedestal is supported by multiple evenly distributed pile foundations. The area of ​​the end surface of the pedestal is larger than the bottom area of ​​the pier body. The pier body is assembled at the center position of the pedestal. In order to save construction costs, the size of the pedestal in the longitudinal direction of the bridge and the distribution range of the pile foundation mostly only need to meet the force requirements of the bridge itself. In this way, not only there is not enough extra size to increase the distance between the front legs and the pier body to be assembled, but also the edge of the pedestal does not have the ability to bear the excessive additional bending moment brought by the construction load. Therefore, once the additional bending moment brought by the construction load is too large, it is easy to cause the edge of the pedestal to break, and in severe cases it may even cause the construction platform to collapse, posing a risk of safety accidents. Summary of the invention

[0005] The problem solved by the present invention is how to reduce the additional bending moment brought to the foundation by the construction load applied by the front legs of the construction platform without affecting the assembly of the pier body, so as to make the construction of the integrated construction platform safer.

[0006] To solve the above problems, the present invention provides an integrated construction platform for an assembled bridge, comprising a main beam and a front support leg, wherein the front support leg is arranged on the main beam and is suitable for moving along the length direction of the main beam, the front support leg comprises a first column, a second column and a first cross beam, the first cross beam comprises a first cross beam body and a first groove structure, the first groove structure is arranged on the first cross beam body, and the notch of the first groove structure is suitable for being arranged toward the pier body, the first column is connected to a portion of the first cross beam body located on one side of the first groove structure, the second column is connected to a portion of the first cross beam body located on the other side of the first groove structure, and the first column and the second column are suitable for being supported on a pedestal.

[0007] Optionally, the front support leg also includes a second cross beam, which is arranged on a side of the first cross beam away from the main beam, the second cross beam includes a second cross beam body and a second groove structure, the notch of the second groove structure is suitable for being set toward the pier body, the first column is connected to a part of the second cross beam body located on one side of the second groove structure, and the second column is connected to a part of the second cross beam body located on the other side of the second groove structure.

[0008] Optionally, the integrated construction platform of the prefabricated bridge also includes a pedestal support and a pier top support, the first column and the second column are telescopic columns, when the telescopic column is extended, the pedestal support is suitable for being connected to the end of the telescopic column away from the main beam and supported on the pedestal, when the telescopic column is retracted, the pier top support is suitable for being connected to the end of the telescopic column away from the main beam and supported on the pier body.

[0009] Optionally, the front supporting leg further includes a supporting wheel structure, and the first cross beam further includes a connecting portion, which is arranged at a side end of the first cross beam body and is suitable for being connected to the main beam through the supporting wheel structure.

[0010] Optionally, the integrated construction platform of the prefabricated bridge also includes auxiliary legs, which are arranged on the main beam and are suitable for moving along the length direction of the main beam. The auxiliary legs include auxiliary crossbeams and auxiliary columns. The auxiliary crossbeams are movably connected to the main beams. In the width direction of the main beam, the auxiliary columns are arranged between the first columns and the second columns and are connected to the auxiliary crossbeams.

[0011] Optionally, the auxiliary support leg further includes a transverse cylinder, one end of which is connected to the auxiliary crossbeam in the width direction of the main beam, and the other end of which is connected to the auxiliary column.

[0012] Optionally, the auxiliary supporting leg further includes a running mechanism, which is disposed between the auxiliary crossbeam and the main beam and is suitable for driving the auxiliary crossbeam to move along the length direction of the main beam.

[0013] Optionally, the integrated construction platform of the prefabricated bridge also includes a first center leg and a second center leg, the first center leg and the second center leg are respectively connected to the main beam, the first center leg includes a first driving device, and / or the second center leg includes a second driving device, the first driving device and the second driving device are suitable for driving the main beam to move along the length direction.

[0014] Optionally, the integrated construction platform of the prefabricated bridge also includes a front lifting mechanism, a middle lifting mechanism and a rear lifting mechanism, and the front lifting mechanism, the middle lifting mechanism and the rear lifting mechanism are respectively arranged on the main beam and are suitable for moving along the length direction of the main beam.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] By arranging the front legs on the main beam and moving them along the length direction of the main beam, it is convenient to support the front legs on the pedestals at different positions, so that the construction platform can be constructed at different positions. The front legs adopt a structure including a first column, a second column and a first cross beam. The first groove structure of the first cross beam is arranged on the first cross beam body, and the groove of the first groove structure is arranged toward the pier body. The first column is connected to the part of the first cross beam body located on one side of the first groove structure, and the second column is connected to the part of the first cross beam body located on the other side of the first groove structure, so that the side of the front legs facing the pier body forms a groove-shaped accommodating cavity that can accommodate the pier body. When the first column and the second column are supported on the pedestal, When the pier is installed, the front outrigger can meet the requirement of the pier body installation space while not exceeding the range of the pier in the upward direction of the longitudinal bridge, and the distance between the front outrigger and the center of the pier can be reduced, thereby reducing the overall additional bending moment of the pier caused by the construction load applied by the front outrigger. In addition, after the construction load of the front outrigger is dispersedly transmitted to the first column and the second column through the first crossbeam, since the first column and the second column are respectively connected to the parts of the first crossbeam body located on both sides of the first groove structure, the construction load applied by the front outrigger can be dispersedly applied to different positions on the pier, thereby reducing the local additional bending moment of the pier. As a result, the construction of the integrated construction platform can be made safer without affecting the assembly of the pier body.

[0017] Another object of the present invention is to provide a method for constructing a prefabricated bridge, so as to solve the problem of how to reduce the additional bending moment brought to the pier by the construction load applied by the front legs of the construction platform without affecting the assembly of the pier body, so as to make the construction of the integrated construction platform safer.

[0018] To solve the above problems, the technical solution of the present invention is achieved as follows:

[0019] A method for constructing an assembled bridge, using the assembled bridge integrated construction platform as described above, comprising:

[0020] Step 1: Whole machine via operation, including:

[0021] Step 1.1, the front leg of the prefabricated bridge integrated construction platform is anchored to the cap at the N4 pier position, and at least one of the first middle leg and the second middle leg of the prefabricated bridge integrated construction platform drives the main beam of the prefabricated bridge integrated construction platform to move forward for the first time;

[0022] Step 1.2, the second middle leg moves forward to cross the first middle leg and is supported on the pier top block at the N3 pier position, and at least one of the first middle leg and the second middle leg drives the main beam to move forward for the second time;

[0023] Step 1.3, the auxiliary legs of the integrated construction platform of the prefabricated bridge are retracted and supported on the pier body at the N4 pier position;

[0024] Step 1.4, release the anchoring of the front leg and the pedestal at the N4 pier position, and move forward longitudinally to the pedestal supported at the N5 pier position, and the auxiliary leg shrinks and moves to the front of the front leg;

[0025] Step 2: Assembly work, including:

[0026] Step 2.1, the front lifting mechanism and the middle lifting mechanism of the integrated construction platform of the assembled bridge lift the pier body to be assembled to the N5 pier position, and after adjusting the assembly posture of the pier body, the middle lifting mechanism withdraws;

[0027] Step 2.2, while the front lifting mechanism assembles the pier body at the N5 pier position, the middle lifting mechanism lifts the pier top block to be assembled at the N4 pier position and assembles it, and the rear lifting mechanism of the prefabricated bridge integrated construction platform lifts a segmental box girder to be assembled to the N3 pier position;

[0028] Step 2.3, after the pier top block at the N4 pier position is assembled, the middle lifting mechanism and the rear lifting mechanism respectively lift the segmental box girder to be assembled, and perform symmetrical hanging assembly operations on both sides of the N3 pier position until the segmental box girder between the N2 pier position and the N3 pier position is assembled;

[0029] Step 3: After completing step 2, execute step 1 to move the integrated construction platform of the prefabricated bridge to the next work area to continue construction.

[0030] The advantages of the prefabricated bridge construction method over the prior art are the same as those of the above-mentioned prefabricated bridge integrated construction platform, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of an integrated construction platform for assembled bridges and a bridge to be erected in an embodiment of the present invention;

[0032] Figure 2 It is a structural schematic diagram of the integrated construction platform for assembled bridges and the bridge to be erected from another perspective in an embodiment of the present invention;

[0033] Figure 3 It is a schematic structural diagram of the front supporting legs in an embodiment of the present invention;

[0034] Figure 4 It is a structural schematic diagram of the integrated construction platform for assembled bridges and the bridge to be erected from another perspective in an embodiment of the present invention;

[0035] Figure 5 For the embodiment of the present invention Figure 4 The enlarged view of point A in the middle;

[0036] Figure 6 It is a structural schematic diagram of the integrated construction platform for assembled bridges during hole-passing operation in an embodiment of the present invention;

[0037] Figure 7 It is a structural schematic diagram of another state of the integrated construction platform for assembled bridges in the embodiment of the present invention when performing through-hole operation;

[0038] Figure 8 It is a structural schematic diagram of another state of the through-hole operation of the integrated construction platform for assembled bridges in an embodiment of the present invention;

[0039] Fig. 9 It is a structural schematic diagram of another state of the through-hole operation of the integrated construction platform for assembled bridges in an embodiment of the present invention;

[0040] Fig.10 It is a structural schematic diagram of another state of the through-hole operation of the integrated construction platform for assembled bridges in an embodiment of the present invention;

[0041] Fig.11 It is a structural schematic diagram of another state of the through-hole operation of the integrated construction platform for assembled bridges in an embodiment of the present invention;

[0042] Fig.12 It is a structural schematic diagram of another state of the through-hole operation of the integrated construction platform for assembled bridges in an embodiment of the present invention;

[0043] Fig.13It is a structural schematic diagram of the assembly operation of the integrated construction platform for assembled bridges in an embodiment of the present invention;

[0044] Fig.14 It is a structural schematic diagram of another state of the assembly operation of the prefabricated bridge integrated construction platform according to an embodiment of the present invention;

[0045] Fig.15 It is a structural schematic diagram of another state of the assembly operation of the integrated construction platform for assembled bridges in an embodiment of the present invention;

[0046] Fig.16 It is a structural schematic diagram of another state of the assembly operation of the integrated construction platform for assembled bridges in an embodiment of the present invention;

[0047] Fig.17 It is a structural schematic diagram of another state of the assembly operation of the integrated construction platform for assembled bridges in an embodiment of the present invention;

[0048] Fig.18 It is a structural schematic diagram of another state of the assembly operation of the integrated construction platform for assembled bridges in an embodiment of the present invention;

[0049] Fig.19 It is a structural schematic diagram of another state of the assembly operation of the integrated construction platform for assembled bridges in an embodiment of the present invention;

[0050] Fig. 20 It is a structural schematic diagram of another state of assembly operation of the integrated construction platform for prefabricated bridges in an embodiment of the present invention.

[0051] Description of reference numerals:

[0052] 1-main beam, 2-front support leg, 21-first column, 22-second column, 23-first crossbeam, 231-first crossbeam body, 232-first groove structure, 233-connecting part, 24-second crossbeam, 25-supporting wheel structure, 3-capping platform support, 4-pier top support, 5-auxiliary support leg, 51-auxiliary crossbeam, 52-auxiliary column, 53-transverse cylinder, 54-travelling mechanism, 6-first middle support leg, 7-second middle support leg, 8-front lifting mechanism, 9-middle lifting mechanism, 10-rear lifting mechanism, 100-pier body, 200-capping platform, 300-pier top block, 400-segmental box beam, 500-pile foundation. DETAILED DESCRIPTION

[0053] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0054] In the description of the present invention, it is necessary to understand that the positive direction of "X" in the drawings represents the left, and correspondingly, the reverse direction of "X" represents the right; the positive direction of "Y" represents the front, and correspondingly, the reverse direction of "Y" represents the back; the positive direction of "Z" represents the top, and correspondingly, the reverse direction of "Z" represents the bottom. The directions or positional relationships indicated by the terms "X", "Y", "Z", etc. are based on the directions or positional relationships shown in the drawings of the specification, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention.

[0055] The terms "first" and "second" etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples.

[0056] To solve the above problems, an embodiment of the present invention provides an integrated construction platform for an assembled bridge, including a main beam 1 and a front support leg 2, the front support leg 2 is arranged on the main beam 1 and is suitable for moving along the length direction of the main beam 1, the front support leg 2 includes a first column 21, a second column 22 and a first beam 23, the first beam 23 includes a first beam body 231 and a first groove structure 232, the first groove structure 232 is arranged on the first beam body 231, and the notch of the first groove structure 232 is suitable for being arranged toward the pier body 100, the first column 21 is connected to a portion of the first beam body 231 located on one side of the first groove structure 232, the second column 22 is connected to a portion of the first beam body 231 located on the other side of the first groove structure 232, and the first column 21 and the second column 22 are suitable for being supported on the base 200.

[0057] like Figures 1 to 3 As shown, in the actual construction process, the cross-sectional shapes of the pier body 100 and the pedestal 200 can be set to square, circular or various shapes combined thereof as needed. Therefore, in order to ensure that the front support leg 2 can meet the installation space of the pier body 100 while not exceeding the range of the pedestal 200 in the longitudinal bridge upward position, the first groove structure 232 of the first cross beam 23 can be set to U-shape, arc shape or various shapes combined thereof according to the cross-sectional shape of the pier body 100; a plurality of columns can be provided for the front support leg 2, and the plurality of columns are arranged along the circumference of the first cross beam 23 and are respectively connected to the first cross beam 23, and are suitable for being supported on the pedestal 200 at a position outside the pier body 100.

[0058] In this embodiment, for the convenience of description, an exemplary description is given by taking the example that the front leg 2 includes a first column 21 and a first column 22 and the first cross beam 23 has a U-shaped cross section.

[0059] A first hole structure is provided on the portion of the first beam body 231 of the first beam 23 located on the left side of the first groove structure 232, and the first hole structure penetrates the first beam body 231 along the height direction of the front leg 2, and the first column 21 passes through the first hole structure and is connected to the first beam body 231. A second hole structure is provided on the portion of the first beam body 231 located on the right side of the first groove structure 232, and the second hole structure also penetrates the first beam body 231 along the height direction of the front leg 2, and the second column 22 passes through the second hole structure and is connected to the first beam body 231. The bottoms of the first column 21 and the second column 22 are suitable for being supported on the platform 200 at a position outside the pier body 100.

[0060] Among them, Figure 1 and Figure 2 As shown, the length direction of the main beam 1 refers to the Y-axis direction, and the height direction of the front leg 2 refers to the Z-axis direction.

[0061] In this way, by arranging the front support leg 2 on the main beam 1 and moving it along the length direction of the main beam 1, it is convenient to support the front support leg 2 on the pedestal 200 at different positions, so that the construction platform can be constructed at different positions. The front support leg 2 adopts a structure including a first column 21, a second column 22 and a first cross beam 23. The first groove structure 232 of the first cross beam 23 is arranged on the first cross beam body 231, and the notch of the first groove structure 232 is arranged toward the pier body 100. The first column 21 is connected to a portion of the first cross beam body 231 located on one side of the first groove structure 232, and the second column 22 is connected to a portion of the first cross beam body 231 located on the other side of the first groove structure 232, so that a groove-shaped accommodating cavity that can accommodate the pier body 100 is formed on the side of the front support leg 2 facing the pier body 100. When the first column 21 and the second column 2 When the front leg 2 is supported on the pedestal 200, the front leg 2 does not exceed the range of the pedestal 200 in the longitudinal direction, and the installation space requirement of the pier body 100 can be met. In addition, the distance between the front leg 2 and the center of the pedestal 200 can be reduced, thereby reducing the overall additional bending moment of the pedestal 200 caused by the construction load applied by the front leg 2. In addition, after the construction load of the front leg 2 is dispersedly transmitted to the first column 21 and the second column 22 through the first crossbeam 23, since the first column 21 and the second column 22 are respectively connected to the parts of the first crossbeam body 231 located on both sides of the first groove structure 232, the construction load applied by the front leg 2 can be dispersedly applied to different positions on the pedestal 200, thereby reducing the local additional bending moment of the pedestal 200. Therefore, the construction of the integrated construction platform can be made safer without affecting the assembly of the pier body 100.

[0062] Optionally, the front support leg 2 also includes a second cross beam 24, which is arranged on the side of the first cross beam 23 away from the main beam 1. The second cross beam 24 includes a second cross beam body (not shown) and a second groove structure (not shown). The notch of the second groove structure is suitable for being set toward the pier body 100. The first column 21 is connected to a part of the second cross beam body located on one side of the second groove structure, and the second column 22 is connected to a part of the second cross beam body located on the other side of the second groove structure. A plurality of second cross beams 24 are provided, and the plurality of second cross beams 24 are spaced apart along the height direction of the front support leg 2.

[0063] like Figure 2 and Figure 4 As shown, in this embodiment, a plurality of second beams 24 are arranged at intervals below the first beam 23, and the structure of each second beam 24 is similar to that of the first beam 23. The parts of the second beam body located on both sides of the second groove structure are also provided with hole structures, and the first column 21 and the second column 22 are respectively connected to the second beam body through the corresponding hole structures.

[0064] In this way, by arranging a plurality of second beams 24 spaced apart along the height direction of the front support leg 2 on the side of the first beam 23 away from the main beam 1, the second beam 24 includes a second beam body and a second groove structure, the notch of the second groove structure is arranged toward the pier body 100, the first column 21 is connected to the portion of the second beam body located on one side of the second groove structure, and the second column 22 is connected to the portion of the second beam body located on the other side of the second groove structure, which can prevent the first column 21 and the second column 22 from being separated or approached from each other at the portion away from the main beam 1, thereby preventing uneven force, thereby making the structure of the front support leg 2 more stable and providing better supporting effect.

[0065] Optionally, the integrated construction platform of the prefabricated bridge also includes a pedestal support 3 and a pier top support 4, the first column 21 and the second column 22 are telescopic columns, when the telescopic column is extended, the pedestal support 3 is suitable for being connected to the end of the telescopic column away from the main beam 1 and supported on the pedestal 200, when the telescopic column is retracted, the pier top support 4 is suitable for being connected to the end of the telescopic column away from the main beam 1 and supported on the pier body 100.

[0066] like Figure 2 and Figure 4 As shown, in the actual construction process, some sections with better construction conditions are sometimes constructed by cast-in-place piers. In this case, there is no need to support the front support leg 2 on the pedestal 200, but it is directly supported on the top of the pier body 100. In this embodiment, in order to improve the versatility of the construction platform, the first column 21 and the second column 22 are telescopic columns, for example, a structure that can be driven to extend and retract up and down by a telescopic cylinder.

[0067] When the front leg 2 is supported on the pedestal 200, in order to increase the contact area between the front leg 2 and the pedestal 200, a pedestal bracket 3 can be arranged at the bottom of the front leg 2. The pedestal bracket 3 is generally a frame structure, and the frames of the frame structure are respectively arranged on the pedestal 200. The area on the pedestal 200 formed by the frames of the frame structure can be used to install the pier body 100. The frames of the frame structure are provided with supports for connecting with telescopic columns. The pedestal bracket 3 can be connected to the pedestal 200 by structures such as bolts or anchor rods, so that the pedestal bracket 3 can be removed after the pier body 100 is installed on the pedestal 200.

[0068] When the front leg 2 is supported on the top of the pier body 100, since the top of the pier body 100 is also provided with connecting steel bars for facilitating the installation of the pier top block 300, in order to make the top of the pier body 100 smoother and increase the contact area between the front leg 2 and the top of the pier body 100, a pier top bracket 4 can be provided at the bottom of the front leg 2. The pier top bracket 4 can adopt a plate structure or a frame structure, and be connected to the connecting steel bars at the top of the pier body 100 by bolts or anchor rods, so that the pier top bracket 4 at this location can be removed after the construction work at the pier position is completed.

[0069] Optionally, the front supporting leg 2 further includes a supporting wheel structure 25 , and the first cross beam 23 further includes a connecting portion 233 , which is arranged at a side end of the first cross beam body 231 and is suitable for being connected to the main beam 1 through the supporting wheel structure 25 .

[0070] like Figure 1 As shown, in this embodiment, the main beam 1 adopts a truss structure, including a left longitudinal beam and a right longitudinal beam, and a first cross beam 23 is arranged at the bottom of the main beam 1, and a connecting portion 233 is provided on the left and right sides thereof, respectively, which are a left connecting portion and a right connecting portion, and a supporting wheel structure 25 is provided on the left connecting portion and the right connecting portion, respectively, the left connecting portion is connected to the left longitudinal beam of the main beam 1 through the left supporting wheel structure, and the right connecting portion is connected to the right longitudinal beam of the main beam 1 through the right supporting wheel structure, so that the front support leg can support the main beam 1 at the bottom thereof and move along its length direction.

[0071] Optionally, the integrated construction platform of the prefabricated bridge also includes an auxiliary support leg 5, which is arranged on the main beam 1 and is suitable for moving along the length direction of the main beam 1. The auxiliary support leg 5 includes an auxiliary crossbeam 51 and an auxiliary column 52. The auxiliary crossbeam 51 is movably connected to the main beam 1. In the width direction of the main beam 1, the auxiliary column 52 is arranged between the first column 21 and the second column 22 and is connected to the auxiliary crossbeam 51.

[0072] like Figure 4As shown, in this embodiment, the auxiliary crossbeam 51 is arranged on the top of the main beam 1, and its left part is movably connected to the left longitudinal beam of the main beam 1, and its right part is movably connected to the right longitudinal beam of the main beam 1, so that the auxiliary crossbeam 51 can move along the length direction of the main beam 1, and one or more auxiliary columns 52 of the auxiliary support leg 5 can be provided, and multiple auxiliary support legs 52 are arranged on the auxiliary crossbeam 51 along the width direction of the main beam 1, and are located between the first column 21 and the second column 22 of the front support leg 2.

[0073] Among them, Figure 4 As shown, the width direction of the main beam 1 refers to the X-axis direction.

[0074] It should be noted that, in order to avoid interference between the auxiliary column 52 and the first cross beam 23 of the front leg 2 during the movement of the auxiliary leg 5 along the length direction of the main beam 1, the auxiliary cross beam 51 is also provided with a hole structure along the height direction of the auxiliary leg 5. The auxiliary column 52 passes through the corresponding hole structure and is connected to the auxiliary cross beam 51, and the auxiliary column 52 can also adopt a telescopic column. When the auxiliary leg 5 needs to cross the front leg 2, the auxiliary column 52 can be moved upward or retracted upward to avoid the first cross beam 23 of the front leg 2. At the same time, the auxiliary column 52 adopts a telescopic column to adjust the height of the main beam 1, thereby facilitating bridge construction operations on sloping sections.

[0075] In this way, by arranging the auxiliary support leg 5 suitable for moving along the length direction of the main beam 1 on the main beam 1, after the pier body 100 at a certain pier position is assembled, the auxiliary support leg 5 can be supported on the pier top bracket 4 at that location to replace the front support leg 2 to support the main beam 1, thereby facilitating the front support leg 2 to be moved to the pedestal 200 at the next pier position for support, and by arranging the auxiliary cross beam 51 of the auxiliary support leg 5 on the top of the main beam 1 and the auxiliary column 52 between the first column 21 and the second column 22 of the front support leg 2, mutual interference between the auxiliary support leg 5 and the front support leg 2 can be avoided, and it is convenient for each of them to move along the length direction of the main beam 1.

[0076] Optionally, the auxiliary support leg 5 further includes a transverse cylinder 53 , and in the width direction of the main beam 1 , one end of the transverse cylinder 53 is connected to the auxiliary crossbeam 51 , and the other end of the transverse cylinder 53 is connected to the auxiliary column 52 .

[0077] In the actual construction process, the bridge usually has a certain curvature. In order to facilitate the hole operation on the curved section, such as Figure 4 and Figure 5As shown, in this embodiment, the auxiliary column 52 of the auxiliary support leg 5 can be movably connected to the auxiliary crossbeam 51, and a transverse cylinder 53 is arranged on the auxiliary crossbeam 51. The transverse cylinder 53 is arranged along the width direction of the main beam 1, and one end of the transverse cylinder 53 is connected to the auxiliary crossbeam 51, and the other end of the transverse cylinder 53 is connected to the auxiliary column 52. When the auxiliary support leg 5 is supported on the top of the assembled pier body 100, the auxiliary crossbeam 51 can be driven by the transverse cylinder 53 to drive the main beam 1 to move slightly left and right, thereby meeting the needs of curved hole passing operations.

[0078] Optionally, the auxiliary supporting leg 5 further includes a running mechanism 54 , which is disposed between the auxiliary crossbeam 51 and the main beam 1 and is suitable for driving the auxiliary crossbeam 51 to move along the length direction of the main beam 1 .

[0079] like Figure 4 and Figure 5 As shown, in this embodiment, the tops of the left and right longitudinal beams of the main beam 1 are provided with running tracks along the length direction, the bottoms of the left and right parts of the auxiliary cross beam 51 are respectively provided with slide groove structures matching the running tracks, the running mechanism 54 is arranged in the slide groove structure and in contact with the running track, and the auxiliary support leg 5 can be driven by the running mechanism 54 and move along the length direction of the main beam 1.

[0080] Optionally, the integrated construction platform of the prefabricated bridge also includes a first center leg 6 and a second center leg 7, and the first center leg 6 and the second center leg 7 are respectively connected to the main beam 1, and the first center leg 6 includes a first driving device (not shown in the figure), and / or the second center leg 7 includes a second driving device (not shown in the figure), and the first driving device and the second driving device are suitable for driving the main beam 1 to move along the length direction.

[0081] like Figure 1 , Figure 2 and Figure 4 As shown, in this embodiment, longitudinal tracks are respectively provided at the bottom of the left longitudinal beam and the right longitudinal beam of the main beam 1, and the first center leg 6 and the second center leg 7 are respectively arranged on the longitudinal tracks through a supporting mechanism, wherein a first driving device can be arranged on the first center leg 6 or a second driving device can be arranged on the second center leg 7, or the first driving device can be arranged on the first center leg 6 and the second driving device can be arranged on the second center leg 7 at the same time. When the first center leg 6 and the second center leg 7 support the main beam 1, the main beam 1 can be driven to move along the length direction by the first driving device and the second driving device, thereby realizing the through-hole operation.

[0082] In addition, the integrated construction platform of the prefabricated bridge also includes a rear support leg, which is arranged behind the first middle support leg 6 and the second middle support leg 7 and is connected to the main beam 1. The rear support leg can assist the first middle support leg 6 in providing rear support for the construction platform when the second middle support leg 7 passes through the hole. The rear support leg can also be driven by a driving device to move along the length direction of the main beam 1, and can also be folded toward the main beam 1 by a folding cylinder, so as to facilitate the disengagement from the assembled bridge deck during the longitudinal movement of the main beam 1 through the hole, or to avoid the transport vehicle transporting prefabricated parts on the bridge deck.

[0083] Optionally, the integrated construction platform of the prefabricated bridge also includes a front lifting mechanism 8, a middle lifting mechanism 9 and a rear lifting mechanism 10, which are respectively arranged on the main beam 1 and are suitable for moving along the length direction of the main beam 1.

[0084] like Figure 1 As shown, in the present embodiment, the front lifting mechanism 8, the middle lifting mechanism 9 and the rear lifting mechanism 10 have basically the same structural form, and are composed of a lifting mechanism, a transverse moving trolley, a longitudinal moving trolley and a sling, etc., and their specific structures can adopt the existing technology, which will not be described in detail here. The front lifting mechanism 8, the middle lifting mechanism 9 and the rear lifting mechanism 10 can lift the prefabricated components separately or cooperate with each other to lift the prefabricated components.

[0085] In addition, when assembling the segmental box girder 400, after the front lifting mechanism 8, the middle lifting mechanism 9 or the rear lifting mechanism 10 lifts the segmental box girder 400 into place, in order to avoid occupying the lifting mechanism during subsequent welding and other operations, a hanging structure that can move along the length direction of the main beam 1 can be provided on the main beam 1. The segmental box girder 400 can be hung under the main beam 1 through the hanging structure, so that the lifting mechanism can be released from the segmental box girder 400 for subsequent lifting operations, thereby improving construction efficiency.

[0086] Another embodiment of the present invention provides a method for constructing an assembled bridge, using the above-mentioned integrated construction platform for assembled bridges, comprising:

[0087] Step 1: Whole machine via operation, including:

[0088] Step 1.1, the front leg 2 of the prefabricated bridge integrated construction platform is anchored to the pedestal 200 at the N4 pier position, and at least one of the first middle leg 6 and the second middle leg 7 of the prefabricated bridge integrated construction platform drives the main beam 1 of the prefabricated bridge integrated construction platform to move forward for the first time.

[0089] Specifically, Figure 6 and Figure 7As shown, after the segment box girder 400 between the N1 pier and the N2 pier is hoisted, the construction work of the integrated construction platform of the prefabricated bridge in the N1 to N4 work area is completed, and it is necessary to move forward one pier to the next work area for construction work. At this time, the initial state of the construction platform is that the front leg 2 is anchored to the pedestal 200 at the N4 pier, the auxiliary leg 5 is located in front of the front leg and is in an idle state, the first middle leg 6 is supported on the bridge deck at the N2 pier, the second middle leg 7 is supported on the bridge deck at the N1 pier, and the rear leg is supported on the bridge deck behind the second middle leg 7. The front lifting mechanism 8 is located above the N4 pier, the middle lifting mechanism 9 is located above the middle area between the N2 pier and the N3 pier, and the rear lifting structure 10 is located above the middle area between the N1 pier and the N2 pier.

[0090] At this time, since the main beam 1 is a double-span structure without support legs between the N2 pier and the N4 pier, in order to reduce the force in this area of ​​the main beam 1 during the longitudinal movement, before the first middle support leg 6 and / or the second middle support leg 7 drive the main beam 1 to move forward for the first time, the front lifting mechanism 8, the middle lifting mechanism 9 and the rear lifting mechanism 10 can be longitudinally moved to the top of the first middle support leg 6, and then synchronously retreated while the main beam 1 moves forward longitudinally, so that it always remains above the first middle support leg 6.

[0091] Step 1.2, the second middle leg 7 moves forward to cross the first middle leg 6 and is supported on the pier top block 300 at the N3 pier position, and at least one of the first middle leg 6 and the second middle leg 7 drives the main beam 1 to move forward for the second time.

[0092] Specifically, Figure 8 and Fig. 9 As shown, after the first longitudinal movement of the main beam 1 is completed, in order to facilitate the forward movement of the second middle leg 7 to cross the first middle leg 6 and support it on the pier top block 300 at the N3 pier position, the front lifting mechanism 8 and the middle lifting mechanism 9 can be firstly moved forward longitudinally to the top of the front leg 2, and then the anchoring of the second middle leg 7 and the bridge deck at the N1 pier position is released, and the second middle leg 7 is lifted to the N3 pier position by the rear lifting mechanism 10 and anchored with the pier top block 300 there to support the main beam 1, and then the front lifting mechanism 8, the middle lifting mechanism 9 and the rear lifting mechanism 10 are longitudinally moved to the top of the second middle leg 7, and the rear leg is separated from the bridge deck by the folding cylinder, and the main beam 1 is driven forward for the second longitudinal movement again by the first middle leg 6 and / or the second middle leg 7.

[0093] Among them, the front lifting mechanism 8, the middle lifting mechanism 9 and the rear lifting mechanism 10 continue to move backward synchronously while the main beam 1 moves forward longitudinally for the second time, so that they always remain above the second middle support leg 7.

[0094] Step 1.3: The auxiliary legs 5 of the integrated construction platform for assembled bridges are retracted and supported on the pier body 100 at the N4 pier position.

[0095] Specifically, Fig.10 As shown, after the auxiliary column 52 of the auxiliary support leg 5 is retracted upward, the auxiliary support leg 5 moves backward as a whole and crosses over the front support leg 2, and is supported and anchored on the pier body 100 at the N4 pier position through the pier top bracket 4. At the same time, the rear support leg moves forward to the rear of the second middle support leg 7 and is supported on the bridge deck.

[0096] Step 1.4, release the anchoring of the front leg 2 and the pedestal 200 at the N4 pier position, and move forward longitudinally to the pedestal 200 supported at the N5 pier position, and the auxiliary leg 5 shrinks and moves to the front of the front leg 2 to complete the whole machine through-hole operation.

[0097] Specifically, Fig.11 and Fig.12 As shown, after the front support leg 2 is longitudinally moved to the pedestal 200 at the N5 pier position for anchoring, the auxiliary support leg 5 is retracted and moved in front of the front support leg 2, while the front lifting mechanism 8, the middle lifting mechanism 9 and the rear lifting mechanism 10 are synchronously longitudinally moved to the tail of the main beam 1 to prepare for the lifting operation, and the whole machine through-hole operation of the prefabricated bridge integrated construction platform is completed.

[0098] Step 2: Assembly work, including:

[0099] Step 2.1, the front lifting mechanism 8 and the middle lifting mechanism 9 of the integrated construction platform of the assembled bridge lift the pier body 100 to be assembled to the N5 pier position, and after adjusting the assembly posture of the pier body 100, the middle lifting mechanism 9 withdraws.

[0100] Specifically, Fig.13 , Fig.14 and Fig.15 As shown, after the integrated construction platform of the prefabricated bridge completes the through-hole operation, it will carry out assembly operations in the N2 to N5 work areas. At this time, the transport vehicle transports the pier body 100, the pier top block 300 and the segment box beam 400 to be assembled from the erected bridge deck in accordance with the assembly order to the lower part of the tail of the main beam 1. The front lifting mechanism 8 and the middle lifting mechanism 9 cooperate with each other to lift and move the pier body 100 to be assembled to the vicinity of the N5 pier position, and then the middle lifting mechanism 9 lowers the bottom of the pier body 100, and the front lifting mechanism 8 retreats synchronously. When the distance between the front lifting mechanism 8 and the middle lifting mechanism 9 is the shortest, the front lifting mechanism 8 and the middle lifting mechanism 9 are braked, and the middle lifting mechanism 9 continues to lower the bottom of the pier body 100 until the pier body 100 is in a vertical state, and then the hoisting device at the bottom of the pier body 100 is removed, the middle lifting mechanism 9 is evacuated, and the front lifting mechanism 8 completes the subsequent assembly of the pier body 100 at the N5 pier position.

[0101] Step 2.2, while the front lifting mechanism 8 assembles the pier body 100 at the N5 pier position, the middle lifting mechanism 9 lifts the pier top block 300 to be assembled at the N4 pier position and assembles it, and the rear lifting mechanism 10 of the prefabricated bridge integrated construction platform lifts a segmental box girder 400 to be assembled to the N3 pier position.

[0102] Specifically, Fig.16 As shown, the pier body 100 at the N4 pier position has been assembled before the whole machine passes through the hole, and sufficient equal strength time has passed when assembling the segment box girder 400 between the N1 and N2 pier positions before the passing through the hole. Therefore, after the whole machine passes through the hole, while the front lifting mechanism 8 assembles the pier body 100 at the N5 pier position, the middle lifting mechanism 9 can lift the pier top block 300 to be assembled and assemble it at the N4 pier position. In this way, the equal strength time of the pier body 100 and the abutment 200 at the N4 pier position can be fully utilized, so that the construction operation time is not restricted by the equal strength of the prefabricated components of the bridge, thereby improving the construction efficiency.

[0103] Step 2.3, after the pier top block 300 at the N4 pier position is assembled, the middle lifting mechanism 9 and the rear lifting mechanism 10 respectively lift the segmental box girder 400 to be assembled, and perform symmetrical hanging assembly operations on both sides of the N3 pier position until the segmental box girder 400 between the N2 pier position and the N3 pier position is assembled.

[0104] Specifically, Figures 17 to 20 As shown, the pier top block 300 at the N3 pier position has been assembled before the whole machine passes through the hole operation, and sufficient equal strength time has passed when assembling the segment box girder 400 between the N1 and N2 pier positions before the passing through the hole operation. Therefore, after the whole machine passes through the hole operation, after the middle lifting mechanism 9 assembles the pier top block 300 at the N4 pier position, the middle lifting mechanism 9 and the rear lifting mechanism 10 can lift the segment box girder 400 to be assembled and assemble it at the N3 pier position, so that the equal strength time of the pier top block 300 at the N3 pier position and the top of the pier body 200 can be fully utilized, so that the construction operation time is not restricted by the equal strength of the prefabricated components of the bridge, thereby improving the construction efficiency.

[0105] Step 3. After completing step 2, execute step 1 to move the integrated construction platform of the prefabricated bridge to the next work area to continue construction.

[0106] The integrated construction platform for assembled bridges has a total of four spans. The main beam 1 is a double-span structure without outrigger support between the first span and the third span. The pier body 100 can be assembled in the first span, the pier top block 300 can be assembled in the second span, and the segmental box beam 400 can be assembled in the third span, thereby realizing simultaneous operations on three working surfaces. The whole machine's through-hole operation is a walking-type switching of outriggers through-holes. None of the outriggers is supported on a bridge deck of unequal strength. The equal-strength time of the pier body 100 and the pedestal 200, as well as the pier top block 300 and the top of the pier body 100 can be fully utilized, so that the construction operation time is not restricted by the equal-strength of the prefabricated components of the bridge, thereby improving construction efficiency.

[0107] Although the disclosure is disclosed as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. An integrated construction platform for assembled bridges, characterized in that: The invention comprises a main beam (1) and a front support leg (2), wherein the front support leg (2) is arranged on the main beam (1) and is suitable for moving along the length direction of the main beam (1), the front support leg (2) comprises a first column (21), a second column (22) and a first cross beam (23), the first cross beam (23) comprises a first cross beam body (231) and a first groove structure (232), the first groove structure (232) is arranged on the first cross beam body (231), and the notch of the first groove structure (232) is suitable for being arranged toward the pier body (100), the first column (21) is connected to a portion of the first cross beam body (231) located on one side of the first groove structure (232), the second column (22) is connected to a portion of the first cross beam body (231) located on the other side of the first groove structure (232), and the first column (21) and the second column (22) are suitable for being supported on a pedestal (200).

2. The integrated construction platform for assembled bridges according to claim 1, characterized in that: The front support leg (2) further comprises a second cross beam (24), wherein the second cross beam (24) is arranged on a side of the first cross beam (23) away from the main beam (1), the second cross beam (24) comprises a second cross beam body and a second groove structure, the notch of the second groove structure is suitable for being arranged toward the pier body (100), the first column (21) is connected to a portion of the second cross beam body located on one side of the second groove structure, and the second column (22) is connected to a portion of the second cross beam body located on the other side of the second groove structure.

3. The integrated construction platform for assembled bridges according to claim 2, characterized in that: It also includes a pedestal support (3) and a pier top support (4), wherein the first column (21) and the second column (22) are telescopic columns. When the telescopic column is extended, the pedestal support (3) is suitable for being connected to one end of the telescopic column away from the main beam (1) and supported on the pedestal (200); when the telescopic column is retracted, the pier top support (4) is suitable for being connected to one end of the telescopic column away from the main beam (1) and supported on the pier body (100).

4. The integrated construction platform for assembled bridges according to any one of claims 1 to 3, characterized in that: The front supporting leg (2) further comprises a supporting wheel structure (25), and the first cross beam (23) further comprises a connecting portion (233), wherein the connecting portion (233) is arranged at a side end of the first cross beam body (231) and is suitable for being connected to the main beam (1) via the supporting wheel structure (25).

5. The integrated construction platform for assembled bridges according to any one of claims 1 to 3, characterized in that: The invention also comprises an auxiliary support leg (5), wherein the auxiliary support leg (5) is arranged on the main beam (1) and is suitable for moving along the length direction of the main beam (1), and the auxiliary support leg (5) comprises an auxiliary cross beam (51) and an auxiliary column (52), wherein the auxiliary cross beam (51) is movably connected to the main beam (1), and in the width direction of the main beam (1), the auxiliary column (52) is arranged between the first column (21) and the second column (22) and is connected to the auxiliary cross beam (51).

6. The integrated construction platform for assembled bridges according to claim 5, characterized in that: The auxiliary support leg (5) also includes a transverse cylinder (53). In the width direction of the main beam (1), one end of the transverse cylinder (53) is connected to the auxiliary crossbeam (51), and the other end of the transverse cylinder (53) is connected to the auxiliary column (52).

7. The integrated construction platform for assembled bridges according to claim 5, characterized in that: The auxiliary supporting leg (5) further comprises a running mechanism (54), wherein the running mechanism (54) is arranged between the auxiliary crossbeam (51) and the main beam (1) and is suitable for driving the auxiliary crossbeam (51) to move along the length direction of the main beam (1).

8. The integrated prefabricated bridge construction platform according to any one of claims 1 to 3, characterized in that: The invention also comprises a first middle leg (6) and a second middle leg (7), wherein the first middle leg (6) and the second middle leg (7) are respectively connected to the main beam (1), the first middle leg (6) comprises a first driving device, and / or the second middle leg (7) comprises a second driving device, and the first driving device and the second driving device are suitable for driving the main beam (1) to move along the length direction.

9. The integrated assembly bridge construction platform according to any one of claims 1 to 3, characterized in that: It also comprises a front lifting mechanism (8), a middle lifting mechanism (9) and a rear lifting mechanism (10); the front lifting mechanism (8), the middle lifting mechanism (9) and the rear lifting mechanism (10) are respectively arranged on the main beam (1) and are suitable for moving along the length direction of the main beam (1).

10. A method for constructing an assembled bridge, using the assembled bridge integrated construction platform as claimed in any one of claims 1 to 9, characterized in that: include: Step 1: Whole machine via operation, including: Step 1.1, the front leg (2) of the prefabricated bridge integrated construction platform is anchored to the pedestal (200) at the N4 pier position, and at least one of the first middle leg (6) and the second middle leg (7) of the prefabricated bridge integrated construction platform drives the main beam (1) of the prefabricated bridge integrated construction platform to move forward for the first time; Step 1.2, the second middle leg (7) moves forward to cross the first middle leg (6) and is supported on the pier top block (300) at the N3 pier position, and at least one of the first middle leg (6) and the second middle leg (7) drives the main beam (1) to move forward for a second time; Step 1.3, the auxiliary legs (5) of the integrated construction platform for assembled bridges are retracted and supported on the top of the pier body (100) at the N4 pier position; Step 1.4, release the anchoring of the front support leg (2) and the support platform (200) at the N4 pier position, and move forward longitudinally to the support platform (200) supported at the N5 pier position, and the auxiliary support leg (5) is retracted and moved to the front of the front support leg (2); Step 2: Assembly work, including: Step 2.1, the front lifting mechanism (8) and the middle lifting mechanism (9) of the integrated construction platform for assembled bridges lift the pier body (100) to be assembled to the N5 pier position, and after adjusting the assembly posture of the pier body (100), the middle lifting mechanism (9) withdraws; Step 2.2, while the front lifting mechanism (8) assembles the pier body (100) at the N5 pier position, the middle lifting mechanism (9) lifts the pier top block (300) to be assembled at the N4 pier position and assembles it, and the rear lifting mechanism (10) of the prefabricated bridge integrated construction platform lifts a segmental box girder (400) to be assembled to the N3 pier position; Step 2.3: After the pier top block (300) at the N4 pier position is assembled, the middle lifting mechanism (9) and the rear lifting mechanism (10) respectively lift the segment box girder (400) to be assembled, and perform symmetrical hanging assembly operations on both sides of the N3 pier position until the segment box girder (400) between the N2 pier position and the N3 pier position is assembled; Step 3: After completing step 2, execute step 1 to move the integrated construction platform of the prefabricated bridge to the next work area to continue construction.

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