Overline curve steel box girder mounting method

Abstract

The invention relates to the technical field of bridge erection, and provides an overline curve steel box girder installation method which is used for erecting a prefabricated and formed curve steel box girder on a limit and comprises the steps that the middle and one end of the curve steel box girder are jacked through a first self-propelled module transport vehicle set and a second self-propelled module transport vehicle set correspondingly; moving the curved steel box girder to one side of the limit; the first self-propelled module transport vehicle set serves as a rotation center, and the first self-propelled module transport vehicle set and the second self-propelled module transport vehicle set drive the curve steel box girder to rotate until the other end of the curve steel box girder crosses the limit; and a third self-propelled module transport vehicle group is arranged on the other side of the limit to support the other end part of the curve steel box girder. According to the invention, the problems that the swivel construction difficulty is high, the swivel speed is relatively slow and the bridge superstructure cannot be quickly replaced by using the existing abutment during the installation of the curved steel box girder at present can be solved, and meanwhile, the cross-line installation of the curved steel box girder can be realized.

Description

Technical Field

[0001] The invention relates to the technical field of bridge erection, and in particular to a method for installing a cross-line curved steel box girder. Background Art

[0002] The demolition and construction of urban bridges and highway cross-line bridges faces the problem of how to reduce traffic interference and social impact. Traditional cross-line bridge construction methods such as demolition, blasting, crane, and bridge erection machine have problems such as long traffic closure time and high safety risks. In recent years, the rapid bridge construction technology based on self-propelled modular transporters (SPMTs) has emerged, which can significantly reduce traffic interference and social impact, and has obvious economic and social benefits.

[0003] At present, there are mainly two methods for erecting curved steel box girders:

[0004] One is the plane rotation method, which can achieve effective rotation in the horizontal direction. The plane rotation method can be divided into: balanced rotating body rotation construction and unbalanced rotating body rotation construction; the balanced rotating body rotation construction mainly drops the center of gravity of the rotating structure to the center of the ball joint, and the balanced rotating body rotation construction can use the bridge's own weight and additional counterweights to achieve the purpose of balance. The unbalanced rotating body rotation construction mainly uses an anchoring system, which does not require the calculation of the counterweight weight, but only requires the calculation of the load size borne by the anchoring system. However, the rotation construction has high precision requirements and great construction difficulty. The ball joint has high manufacturing precision requirements and high cost, and the rotation speed is relatively slow. When the upper structure of the bridge is replaced, the original pier cannot be used directly when the rotation construction is adopted, and it is necessary to add devices such as ball joints, and rapid replacement construction cannot be achieved.

[0005] The other is a bridge rapid replacement technology based on SPMT modular vehicles. SPMT modular vehicles are combined to form an SPMT vehicle group. Support tooling such as steel pipe brackets are set up on the SPMT modular vehicles. The vehicle group and the support tooling enter under the beam section. The hydraulic device of the SPMT modular vehicle is used to lift the tooling and the beam section to achieve synchronous lifting of the bridge. The power device is used to achieve the overall movement of the SPMT vehicle group, the beam section and the support tooling. After the beam section reaches the bridge position, the hydraulic lifting device of the SPMT modular vehicle is used to achieve the overall precise lowering of the beam section. However, when using the above construction method to erect a cross-line bridge, the SPMT vehicle group needs to cross the existing route and drive on the road being crossed. For bridges across railways / rivers, it is difficult for the SPMT vehicle group to cross the railway / river. During the construction process of the SPMT method, the road needs to be closed for a certain period of time, and the structures on the road, such as the central dividing strip, are modified to allow the SPMT vehicle group to pass, which has a greater impact on traffic. Summary of the invention

[0006] The purpose of the present invention is to provide a method for installing a cross-line curved steel box girder, which can solve the problems existing in the current installation of curved steel box girders, such as the difficulty of rotation construction, relatively slow rotation speed, and inability to quickly replace the bridge superstructure using existing piers, while at the same time being able to realize the cross-line installation of curved steel box girders.

[0007] The above technical objectives of the present invention are mainly achieved through the following technical solutions:

[0008] The present invention provides a method for installing a cross-line curved steel box girder, which is used to erect a prefabricated curved steel box girder on a limit. The method for installing a cross-line curved steel box girder comprises:

[0009] Lifting the middle part and one end part of the curved steel box girder respectively by the first self-propelled module transport vehicle group and the second self-propelled module transport vehicle group, and moving the curved steel box girder to one side of the limit;

[0010] With the first self-propelled module transport vehicle set as the rotation center, the first self-propelled module transport vehicle set and the second self-propelled module transport vehicle set drive the curved steel box girder to rotate until the other end of the curved steel box girder crosses the limit;

[0011] A third self-propelled module transport vehicle set is arranged on the other side of the limit to support the other end of the curved steel box girder.

[0012] In a preferred embodiment of the present invention, after a third self-propelled module transport vehicle group is arranged on the other side of the limit to support the other end of the curved steel box girder, the installation method further comprises:

[0013] The first self-propelled module transport vehicle set is removed, and the curved steel box girder is driven to move to a predetermined erection position by the second self-propelled module transport vehicle set and the third self-propelled module transport vehicle set;

[0014] The second self-propelled module transport vehicle set and the third self-propelled module transport vehicle set are removed to respectively erect the two ends of the curved steel box girder on the prefabricated beam supports on both sides of the limit.

[0015] In a preferred embodiment of the present invention, the curved steel box girder includes a main body section and a guide beam section that are detachably connected, the first self-propelled modular transport vehicle group and the second self-propelled modular transport vehicle group both support the main body section, and the third self-propelled modular transport vehicle group supports the guide beam section.

[0016] In a preferred embodiment of the present invention, after a third self-propelled module transport vehicle set is arranged on the other side of the limit to support the guide beam segment, the installation method further comprises:

[0017] The first self-propelled module transport vehicle set is removed, and the curved steel box girder is driven by the second self-propelled module transport vehicle set and the third self-propelled module transport vehicle set to move to the end where the body section connects to the guide beam section and crosses the limit;

[0018] A fourth self-propelled module transport vehicle group is arranged on the other side of the limit to support the body section;

[0019] The third self-propelled modular transport vehicle group is removed and the guide beam segment is dismantled.

[0020] In a preferred embodiment of the present invention, after removing the third self-propelled modular transport vehicle set and dismantling the guide beam segment, the installation method further comprises:

[0021] The body segment is driven to move to a predetermined installation position by the second self-propelled module transport vehicle group and the fourth self-propelled module transport vehicle group;

[0022] The second self-propelled module transport vehicle set and the fourth self-propelled module transport vehicle set are removed to respectively erect the two ends of the body section on the prefabricated beam supports on both sides of the limit.

[0023] In a preferred embodiment of the present invention, the first self-propelled module transport vehicle group comprises:

[0024] The first traveling wheel set;

[0025] A first adjustable support column is disposed above the first traveling wheel set, and the first adjustable support column is used to place and support the curved steel box girder;

[0026] A cable bracket is arranged above the first traveling wheel set, and a first cable is connected between the cable bracket and the curved steel box girder.

[0027] In a preferred embodiment of the present invention, the second self-propelled module transport vehicle group comprises:

[0028] Second traveling wheel set;

[0029] A second adjustable support column is disposed above the second traveling wheel set, and the second adjustable support column is used to place and support the curved steel box girder;

[0030] A second cable is connected between the second traveling wheel set and the curved steel box girder;

[0031] The structure of the third self-propelled module transport vehicle set is the same as the structure of the second self-propelled module transport vehicle set.

[0032] In a preferred embodiment of the present invention, when the curved steel box girder is lifted by the first self-propelled modular transport vehicle group, the first cable is connected between the cable bracket and the curved steel box girder; when the first self-propelled modular transport vehicle group is removed, the first cable is removed together.

[0033] In a preferred embodiment of the present invention, during the rotation of the curved steel box girder, the first self-propelled modular transport vehicle group rotates in situ using a center rotation mode, and the second self-propelled modular transport vehicle group rotates around the first self-propelled modular transport vehicle group using an eight-shaped turning mode.

[0034] In a preferred embodiment of the present invention, the boundary is a road or a river.

[0035] Compared with the prior art, the technical solution of the present invention has the following characteristics and advantages:

[0036] 1. Use multiple self-propelled modular transport vehicles to transfer and erect curved steel box girders. The moving speed is fast, which can increase the rotation speed and reduce the impact of the construction process on route traffic.

[0037] 2. The coordinated cooperation between multiple self-propelled modular transport vehicles is adopted to realize the wide-limit erection of curved steel box girders through rotation. The pre-construction preparation and construction process do not occupy the existing roads under the bridge, and there is no need to modify the original road surface, which will not affect the road traffic under the bridge. The construction process is simple and safe, avoiding the complex processes of jacking and rotation construction, and there is no need to set up temporary piers, turntables, slide rails and other devices, which can shorten the construction period.

[0038] 3. The self-propelled modular transport vehicle group has a large carrying capacity, and the number of vehicle groups can be increased according to the weight of the curved steel box girder; the support height of the adjustable support columns on the self-propelled modular transport vehicle group can be flexibly adjusted to adapt to different steel box girder structures such as equal height and variable height. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0040] The accompanying drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the figures are only schematic, used to help understand the present invention, and are not specifically limited to the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to the teachings of the present invention.

[0041] Figure 1 It is a schematic diagram of the first state of the operation process of the method for installing the cross-line curved steel box girder of the present invention;

[0042] Figure 2 It is a schematic diagram of the second state of the operation process of the method for installing the cross-line curved steel box girder of the present invention;

[0043] Figure 3 It is a schematic diagram of the third state of the operation process of the installation method of the cross-line curved steel box girder of the present invention;

[0044] Figure 4 It is a structural schematic diagram of the first self-propelled module transport vehicle group of the present invention;

[0045] Figure 5 It is a structural schematic diagram of the second self-propelled modular transport vehicle group of the present invention;

[0046] Figure 6 It is a structural schematic diagram of the third self-propelled modular transport vehicle group of the present invention;

[0047] Figure 7 It is a structural schematic diagram of another embodiment of the method for installing a cross-line curved steel box girder according to the present invention.

[0048] Description of reference numerals:

[0049] 10. Curved steel box girder; 11. Main body section; 12. Guide beam section;

[0050] 20. Limit;

[0051] 30. First self-propelled module transport vehicle group; 31. First walking wheel group; 32. First adjustable support column; 33. First connecting rod; 34. First distribution beam; 35. Cable bracket; 36. Cable saddle; 37. Cable;

[0052] 40. Second self-propelled module transport vehicle group; 41. Second walking wheel group; 42. Second adjustable support column; 43. Second connecting rod; 44. Second distribution beam; 45. Second cable;

[0053] 50. The third self-propelled modular transport vehicle group; 51. The third walking wheel group; 52. The third adjustable supporting column; 53. The third connecting rod; 54. The third distribution beam. DETAILED DESCRIPTION

[0054] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0055] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0057] Implementation method 1:

[0058] like Figures 1 to 3 As shown, the present invention provides a method for installing a cross-line curved steel box girder, which is used to erect a prefabricated curved steel box girder 10 on a limit 20. The method for installing a cross-line curved steel box girder comprises the following steps:

[0059] Step S1: lift the middle part and one end part of the curved steel box girder 10 respectively by the first self-propelled module transport vehicle group 30 and the second self-propelled module transport vehicle group 40, and move the curved steel box girder 10 to one side of the limit 20;

[0060] Step S2: With the first self-propelled module transport vehicle group 30 as the rotation center, the first self-propelled module transport vehicle group 30 and the second self-propelled module transport vehicle group 40 drive the curved steel box girder 10 to rotate until the other end of the curved steel box girder 10 crosses the limit 20;

[0061] Step S3: a third self-propelled module transport vehicle group 50 is arranged on the other side of the boundary 20 to support the other end of the curved steel box girder 10 .

[0062] The method for installing a cross-line curved steel box girder of the present invention uses a plurality of self-propelled modular transport vehicle groups to transport and erect the curved steel box girder 10, and has a relatively fast moving speed, which can increase the rotation speed and reduce the impact of the construction process on the route traffic. The self-propelled modular transport vehicle group has a large carrying capacity, and the number of vehicle groups can be increased according to the weight of the curved steel box girder 10; the support height of the adjustable support column on the self-propelled modular transport vehicle group can be flexibly adjusted to adapt to different steel box girder structures such as equal height and variable height.

[0063] The method for installing a cross-line curved steel box girder described in the present invention adopts the coordinated cooperation between multiple self-propelled modular transport vehicle groups, and realizes the wide-limit erection of the curved steel box girder 10 by rotation. The pre-construction preparation and construction process do not occupy the existing road under the bridge, and there is no need to modify the original road surface, which will not affect the road traffic under the bridge. The construction process is simple and safe, avoiding the complicated processes of jacking and rotation construction, and there is no need to set up temporary piers, turntables, slide rails and other devices, which can shorten the construction period.

[0064] The specific construction process of each step of the installation method of the cross-line curved steel box girder of the present invention will be described in detail below.

[0065] First of all, it should be noted that Figure 1 As shown, the curved steel box girder 10 described in the present invention refers to a steel box girder extending along an arc direction, the limit 20 described in the present invention is a road (highway, railway, etc.) or a river, and the construction condition described in the present invention is to erect the above-mentioned curved steel box girder 10 above the above-mentioned limit 20.

[0066] In step S1, if Figure 1 As shown, before the cross-line construction of the curved steel box girder 10 is carried out, a route for transporting the curved steel box girder 10 from the prefabrication yard to the construction site is pre-planned. In the prefabrication yard, the first self-propelled module transport vehicle set 30 is moved to the bottom of the middle of the curved steel box girder 10, and the second self-propelled module transport vehicle set 40 is moved to the bottom of one end of the curved steel box girder 10. At the same time, the supporting structures in the two self-propelled module transport vehicle sets are raised to support the curved steel box girder 10 and to separate the curved steel box girder 10 from the original support. Thereafter, the curved steel box girder 10 is transported along the pre-planned route to one side of the limit 20, i.e., the swivel frame construction position.

[0067] The specific structures of the first self-propelled module transport vehicle group 30 and the second self-propelled module transport vehicle group 40 are as follows:

[0068] like Figure 4As shown, the first self-propelled module transport vehicle group 30 includes: a first running wheel group 31, a first adjustable support column 32 and a cable bracket 35. The first running wheel group 31 has a support plate and a plurality of running wheels arranged on the lower end surface of the support plate. A plurality of first adjustable support columns 32 are arranged above the first running wheel group 31, and the first adjustable support columns 32 are arranged in the vertical direction, and the lower end thereof is fixedly connected to the support plate, and the upper end thereof is provided with a first distribution beam 34, and the adjacent first adjustable support columns 32 are connected by a plurality of first connecting rods 33, thereby forming a truss structure to improve the support strength. The middle part of the curved steel box girder 10 is placed on the first distribution beam 34, and the first distribution beam 34 evenly transfers the load of the curved steel box girder 10 to each first adjustable support column 32. The support height of the first adjustable support column 32 can be flexibly adjusted, and can adapt to the structural forms of different steel box girders such as equal height and variable height. The cable bracket 35 is arranged above the first walking wheel group 31, and the cable bracket 35 is arranged in the vertical direction, and its lower end is fixedly connected to the support plate, and its upper end is provided with a saddle 36; after the curved steel box girder 10 is placed on the first distribution beam 34, the simply supported end of the curved steel box girder 10 (one end provided with the second self-propelled modular transport vehicle group 40) is connected to the saddle 36 through multiple first cables 37, and at the same time, the cantilever end of the curved steel box girder 10 is connected to the saddle 36 through multiple first cables 37, thereby forming a self-anchored cable-stayed structure between the cable bracket 35 and the curved steel box girder 10, thereby improving the stability of the curved steel box girder 10 during transportation and rotation.

[0069] like Figure 5 As shown, the second self-propelled module transport vehicle group 40 includes: a second running wheel group 41 and a second adjustable support column 42. The second running wheel group 41 has a support plate and a plurality of running wheels arranged on the lower end surface of the support plate. A plurality of second adjustable support columns 42 are arranged above the second running wheel group 41, and the second adjustable support columns 42 are arranged in the vertical direction, and the lower end thereof is fixedly connected to the support plate, and the upper end is provided with a second distribution beam 44, and the adjacent second adjustable support columns 42 are connected by a plurality of second connecting rods 43, thereby forming a truss structure to improve the support strength. One end of the curved steel box girder 10 is placed on the second distribution beam 44, and the second distribution beam 44 evenly transfers the load of the curved steel box girder 10 to each second adjustable support column 42. The support height of the second adjustable support column 42 can be flexibly adjusted, and can adapt to different structural forms of steel box girders such as equal height and variable height. After the curved steel box girder 10 is placed on the second distribution beam 44, the curved steel box girder 10 is connected to the support plate through multiple second cables 45. The second cables 45 fix the curved steel box girder 10 on the second self-propelled modular transport vehicle group 40, which can improve the stability of the curved steel box girder 10 during transportation and rotation.

[0070] In step S2, after the curved steel box girder 10 is transported to the right place and its direction is adjusted, Figure 1 and Figure 2 As shown, with the first self-propelled modular transport vehicle group 30 as the rotation center, the first self-propelled modular transport vehicle group 30 rotates in situ in a center rotation mode, and the second self-propelled modular transport vehicle group 40 moves in an eight-shaped turning mode, driving the curved steel box girder 10 to rotate with the first self-propelled modular transport vehicle group 30 as the center until the other end (cantilever end) of the curved steel box girder 10 crosses the limit 20.

[0071] In step S3, after the cantilever end of the curved steel box girder 10 crosses the limit 20 and extends to the other side of the limit 20, as shown in FIG. Figure 2 As shown, a third self-propelled module transport vehicle group 50 is arranged on the other side of the limit 20, and the third self-propelled module transport vehicle group 50 is moved to the bottom of the cantilever end of the curved steel box girder 10, and then the supporting structure is raised to support the curved steel box girder 10.

[0072] Among them, Figure 6 As shown, the third self-propelled module transport vehicle group 50 includes a third running wheel group 51, a third adjustable support column 52, a third connecting rod 53 and a third distribution beam 54. The structure of the third self-propelled module transport vehicle group 50 is the same as that of the second self-propelled module transport vehicle group 40, and will not be repeated here.

[0073] According to one embodiment of the present invention, Figure 3 As shown, after a third self-propelled module transport vehicle group 50 is arranged on the other side of the limit 20 to support the other end of the curved steel box girder 10, the installation method further includes:

[0074] Step S4: remove the first self-propelled module transport vehicle set 30, and drive the curved steel box girder 10 to a predetermined erection position by the second self-propelled module transport vehicle set 40 and the third self-propelled module transport vehicle set 50;

[0075] Step S5: remove the second self-propelled module transport vehicle set 40 and the third self-propelled module transport vehicle set 50 to respectively erect the two ends of the curved steel box girder 10 on the prefabricated beam supports on both sides of the limit 20 .

[0076] The specific operation process of step S4 and step S5 is as follows:

[0077] In step S4, Figure 3As shown, after a stable support is formed at the cantilever end of the curved steel box girder 10 by the third self-propelled module transport vehicle set 50, the first self-propelled module transport vehicle set 30 arranged in the middle of the curved steel box girder 10 can be removed. The multiple first cables 37 arranged between the curved steel box girder 10 and the cable bracket 35 are removed, and the supporting height of each first adjustable support column 32 is lowered, and the first self-propelled module transport vehicle set 30 is removed from the lower end of the curved steel box girder 10. At this time, the two ends of the curved steel box girder 10 are supported by the second self-propelled module transport vehicle set 40 and the third self-propelled module transport vehicle set 50 respectively.

[0078] In step S5, after removing the first self-propelled module transport vehicle group 30, since the erection direction (posture) of the curved steel box girder 10 is usually different from the direction (posture) after the curved steel box girder 10 is rotated, it is necessary to further adjust the position and direction of the curved steel box girder 10 by the second self-propelled module transport vehicle group 40 and the third self-propelled module transport vehicle group 50 until the curved steel box girder 10 moves to the predetermined erection position. After the curved steel box girder 10 is adjusted into place again, the second self-propelled module transport vehicle group 40 and the third self-propelled module transport vehicle group 50 are synchronously lifted and lowered to accurately drop the curved steel box girder 10 onto the prefabricated beam support (usually a bridge pier), thereby realizing the cross-line erection of the curved steel box girder 10, while avoiding the impact on the lower limit 20.

[0079] Implementation method 2:

[0080] like Figure 7 As shown, for a shorter curved steel box girder 10, when the length of the curved steel box girder 10 is not enough to cross the limit 20 by rotating, the present invention also provides another method for installing a curved steel box girder across a line by using a guide beam to realize the rotation of the curved steel box girder 10, which includes the following steps:

[0081] Step S01: A guide beam is connected to one end of the main body section 11 of the curved steel box girder 10 to form a guide beam section 12. The guide beam section 12 and the main body section 11 constitute the curved steel box girder 10 during rotation erection. The middle part of the curved steel box girder 10 is lifted by the first self-propelled module transport vehicle group 30, and the end of the main body section 11 away from the guide beam section 12 is lifted by the second self-propelled module transport vehicle group 40, and the curved steel box girder 10 is moved to one side of the limit 20;

[0082] Step S02: With the first self-propelled module transport vehicle set 30 as the rotation center, the first self-propelled module transport vehicle set 30 and the second self-propelled module transport vehicle set 40 drive the curved steel box girder 10 to rotate until the end of the guide beam section 12 away from the body section 11 crosses the limit 20;

[0083] Step S03: Arrange a third self-propelled module transport vehicle set 50 on the other side of the limit 20 to support the guide beam section 12;

[0084] Step S04: remove the first self-propelled module transport vehicle set 30, and drive the curved steel box girder 10 to move to the end where the body section 11 connects to the guide beam section 12 through the second self-propelled module transport vehicle set 40 and the third self-propelled module transport vehicle set 50 to cross the limit 20;

[0085] Step S05: Arrange a fourth self-propelled module transport vehicle set on the other side of the boundary 20 to support the end of the body section 11;

[0086] Step S06: remove the third self-propelled module transport vehicle set 50 and dismantle the guide beam segment 12.

[0087] The method for installing a cross-line curved steel box girder described in the present invention can not only achieve the technical effects described in the first embodiment, but also solve the problem that a shorter curved steel box girder is difficult to erect by rotation.

[0088] The specific construction process of each step of the installation method of the cross-line curved steel box girder of the present invention will be described in detail below.

[0089] In step S01, before the cross-line construction of the curved steel box girder 10 is carried out, a route for transporting the curved steel box girder 10 from the prefabrication site to the construction site is pre-planned. Figure 7 As shown, in the prefabrication yard, the guide beam is connected to one end of the steel box beam, the guide beam forms the guide beam section 12, and the steel box beam body forms the body section 11, and the two are connected to form the curved steel box beam 10 in the process of rotating erection. The first self-propelled module transport vehicle group 30 is moved to the lower part of the middle part of the curved steel box beam 10 (it is necessary to ensure that the first self-propelled module transport vehicle group 30 is located below the body section 11), and the second self-propelled module transport vehicle group 40 is moved to the lower part of the end of the body section 11 away from the guide beam section 12, and at the same time, the support structures in the two self-propelled module transport vehicle groups are raised to support the curved steel box beam 10 and make the curved steel box beam 10 detached from the original support; then the curved steel box beam 10 is transported to one side of the limit 20 along the pre-planned route, that is, the rotating erection construction position.

[0090] The structures of the first self-propelled module transport vehicle group 30 and the second self-propelled module transport vehicle group 40 have been described in the first embodiment and will not be repeated here.

[0091] In step S02, after the curved steel box girder 10 is transferred to its place and its direction is adjusted, the first self-propelled modular transport vehicle group 30 is used as the rotation center, and the first self-propelled modular transport vehicle group 30 rotates in situ in a center rotation mode, and the second self-propelled modular transport vehicle group 40 moves in an eight-shaped turning mode, driving the curved steel box girder 10 to rotate with the first self-propelled modular transport vehicle group 30 as the center until the end of the guide beam section 12 crosses the limit 20.

[0092] In step S03, after the end of the guide beam section 12 crosses the limit 20 and extends to the other side of the limit 20, a third self-propelled modular transport vehicle group 50 is set on the other side of the limit 20, and the third self-propelled modular transport vehicle group 50 is moved to the bottom of the guide beam section 12, and the supporting structure is raised to support the guide beam section 12.

[0093] Among them, the structure of the third self-propelled modular transport vehicle group 50 has been described in the first embodiment and will not be repeated here.

[0094] In step S04, after the guide beam section 12 is supported, one end of the main section 11 of the curved steel box girder 10 (the end connected to the guide beam section 12) does not cross the limit 20, so it is necessary to continue to move the curved steel box girder 10 toward the other side of the limit 20 so that the main section 11 can completely cross the limit 20 (the actual bridge to be erected is the main section 11, and the guide beam section 12 is used for auxiliary erection and needs to be removed after use). At this time, the first self-propelled module transport vehicle group 30 restricts the movement of the curved steel box girder 10 toward the other side, so it is necessary to remove the first self-propelled module transport vehicle group 30. Remove the multiple first cables 37 set between the curved steel box girder 10 and the cable bracket 35, and at the same time reduce the support height of each first adjustable support column 32, and move the first self-propelled module transport vehicle group 30 away from the lower end of the main section 11. At this time, the body section 11 of the curved steel box girder 10 is supported by the second self-propelled module transport vehicle set 40, and the guide beam section 12 of the curved steel box girder 10 is supported by the third self-propelled module transport vehicle set 50. After removing the first self-propelled module transport vehicle set 30, the curved steel box girder 10 is driven to move toward the other side of the limit 20 by the second self-propelled module transport vehicle set 40 and the third self-propelled module transport vehicle set 50, so that the body section 11 can completely cross the limit 20 (the two ends of the body section 11 are respectively located on both sides of the limit 20).

[0095] In step S05, after one end of the body section 11 crosses the limit 20 and extends to the other side of the limit 20, a fourth self-propelled module transport vehicle set is arranged on the other side of the limit 20, and the fourth self-propelled module transport vehicle set is moved to the bottom of the body section 11, and then the support structure is raised to support the body section 11. At this time, both ends of the body section 11 are supported by the second self-propelled module transport vehicle set 40 and the fourth self-propelled module transport vehicle set, respectively.

[0096] Among them, the structure of the fourth self-propelled module transport vehicle group is the same as the structure of the second self-propelled module transport vehicle group 40, which will not be repeated here.

[0097] In step S06 , the support height of each third adjustable support column 52 in the third self-propelled module transport vehicle set 50 is lowered, and the third self-propelled module transport vehicle set 50 is removed from the lower end of the guide beam section 12 ; then the guide beam section 12 is removed from the body section 11 .

[0098] According to one embodiment of the present invention, after removing the third self-propelled module transport vehicle group 50 and dismantling the guide beam segment 12, the installation method further includes the following steps:

[0099] Step S07: The second self-propelled module transport vehicle group 40 and the fourth self-propelled module transport vehicle group drive the body section 11 to move to a predetermined installation position.

[0100] Step S08: remove the second self-propelled module transport vehicle set 40 and the fourth self-propelled module transport vehicle set to respectively mount the two ends of the body section 11 on the prefabricated beam supports on both sides of the limit 20 .

[0101] The specific operation process of step S07 and step S08 is as follows:

[0102] In step S07, after removing the first self-propelled module transport vehicle group 30 and the third self-propelled module transport vehicle group 50, since the installation direction (posture) of the main body segment 11 is usually different from the direction (posture) after the main body segment 11 is rotated, it is necessary to further adjust the position and direction of the main body segment 11 through the second self-propelled module transport vehicle group 40 and the fourth self-propelled module transport vehicle group until the main body segment 11 moves to the predetermined installation position.

[0103] In step S08, after the main body section 11 is adjusted into place, the second self-propelled module transport vehicle group 40 and the fourth self-propelled module transport vehicle group are synchronously lifted and lowered to accurately drop the main body section 11 onto the prefabricated beam support (usually a bridge pier), thereby realizing the cross-line erection of the curved steel box girder 10 (main body section 11) while avoiding the impact on the lower limit 20.

[0104] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for installing a cross-line curved steel box girder, for erecting a prefabricated curved steel box girder (10) on a limit (20), characterized in that: The installation method of the cross-line curved steel box girder comprises: The middle part and one end part of the curved steel box girder (10) are respectively lifted by a first self-propelled module transport vehicle group (30) and a second self-propelled module transport vehicle group (40), and the curved steel box girder (10) is moved to one side of the limit (20); With the first self-propelled module transport vehicle group (30) as the rotation center, the first self-propelled module transport vehicle group (30) and the second self-propelled module transport vehicle group (40) drive the curved steel box girder (10) to rotate until the other end of the curved steel box girder (10) crosses the limit (20); A third self-propelled module transport vehicle group (50) is arranged on the other side of the boundary (20) to support the other end of the curved steel box girder (10).

2. The method for installing a cross-line curved steel box girder according to claim 1, characterized in that: After a third self-propelled module transport vehicle group (50) is arranged on the other side of the limit (20) to support the other end of the curved steel box girder (10), the installation method further comprises: The first self-propelled module transport vehicle group (30) is removed, and the curved steel box girder (10) is driven to move to a predetermined erection position by the second self-propelled module transport vehicle group (40) and the third self-propelled module transport vehicle group (50); The second self-propelled module transport vehicle group (40) and the third self-propelled module transport vehicle group (50) are removed to respectively erect the two ends of the curved steel box girder (10) on the prefabricated beam supports on both sides of the limit (20).

3. The method for installing a cross-line curved steel box girder according to claim 1, characterized in that: The curved steel box girder (10) comprises a main body section (11) and a guide beam section (12) which are detachably connected; the first self-propelled module transport vehicle group (30) and the second self-propelled module transport vehicle group (40) both support the main body section (11); and the third self-propelled module transport vehicle group (50) supports the guide beam section (12).

4. The method for installing a cross-line curved steel box girder according to claim 3 is characterized in that: After a third self-propelled module transport vehicle group (50) is arranged on the other side of the limit (20) to support the guide beam section (12), the installation method further comprises: The first self-propelled module transport vehicle group (30) is removed, and the curved steel box girder (10) is driven by the second self-propelled module transport vehicle group (40) and the third self-propelled module transport vehicle group (50) to move to the end of the body section (11) connected to the guide beam section (12) to cross the limit (20); A fourth self-propelled module transport vehicle group is arranged on the other side of the limit (20) to support the body section (11); The third self-propelled module transport vehicle group (50) is removed and the guide beam section (12) is dismantled.

5. The method for installing a cross-line curved steel box girder according to claim 4, characterized in that: After removing the third self-propelled module transport vehicle group (50) and dismantling the guide beam segment (12), the installation method further comprises: The body section (11) is driven to move to a predetermined installation position by the second self-propelled module transport vehicle group (40) and the fourth self-propelled module transport vehicle group; The second self-propelled module transport vehicle group (40) and the fourth self-propelled module transport vehicle group are removed to respectively erect the two ends of the body section (11) on the prefabricated beam supports on both sides of the limit (20).

6. The method for installing a cross-line curved steel box girder according to claim 1, characterized in that: The first self-propelled module transport vehicle group (30) comprises: A first running wheel set (31); A first adjustable support column (32), disposed above the first running wheel set (31), the first adjustable support column (32) being used to place and support the curved steel box girder (10); A cable support (35) is arranged above the first running wheel set (31), and a first cable (37) is connected between the cable support (35) and the curved steel box girder (10).

7. The method for installing a cross-line curved steel box girder according to claim 1, characterized in that: The second self-propelled module transport vehicle group (40) comprises: A second traveling wheel set (41); A second adjustable supporting column (42) is disposed above the second traveling wheel set (41), and the second adjustable supporting column (42) is used to place and support the curved steel box girder (10); A second cable (45) connected between the second running wheel set (41) and the curved steel box girder (10); The structure of the third self-propelled module transport vehicle group (50) is the same as that of the second self-propelled module transport vehicle group (40).

8. The method for installing a cross-line curved steel box girder according to claim 6, characterized in that: When the curved steel box girder (10) is lifted by the first self-propelled module transport vehicle group (30), the first cable (37) is connected between the cable bracket (35) and the curved steel box girder (10); when the first self-propelled module transport vehicle group (30) is removed, the first cable (37) is removed together.

9. The method for installing a cross-line curved steel box girder according to claim 1, characterized in that: During the rotation of the curved steel box girder (10), the first self-propelled module transport vehicle group (30) rotates in situ in a center rotation mode, and the second self-propelled module transport vehicle group (40) rotates around the first self-propelled module transport vehicle group (30) in an eight-shaped turning mode.

10. The method for installing a cross-line curved steel box girder according to claim 1, characterized in that: The boundary (20) is a road or a river.

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