Large-span bridge-building machine and process for continuous hole-passing of large-span composite beams

Abstract

The present invention provides a large-span bridge-building machine and a process method for continuous through-hole construction of a large-span composite beam. The large-span bridge-building machine comprises: a bridge-building machine body, a forward moving device capable of moving along a guide rail, a supporting device for supporting the bridge-building machine body, and a power device; the bridge-building machine body comprises: two main trusses arranged in parallel along the extension direction of the composite beam, a flat-jointed assembly arranged at the front and rear ends of the two main trusses for stabilizing the two main trusses, and a front guide beam arranged at the front ends of the two main trusses for assisting in moving through-holes; the forward moving device comprises: a front fulcrum trolley and a rear fulcrum trolley respectively having bottom wheels, the front fulcrum trolley and the rear fulcrum trolley being capable of moving along the guide rail to drive the bridge-building machine body to move; the supporting device comprises: a first rear support leg, a middle support leg, a second rear support leg, and a front support leg which are selectively and movably installed at the bottom of the two main trusses; the power device comprises: a forward moving power device and a backward moving power device.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, and in particular to a large-span bridge-building machine and a process method for continuous hole passing of a large-span composite beam. Background Art

[0002] With the rapid development of China's infrastructure, bridge engineering, as an important carrier across mountains, rivers and existing lines, has been continuously improved in its structural form. The superstructure of the bridge is often designed in combination with different structural forms to ensure the stress state. The Shuibei Village Extra-Large Bridge of the Fifth Section of the Xiyin Railway is a combination of prestressed concrete segmented simply supported box beams and continuous (rigid frame) beams. During the construction process, the mobile support bridge-building machine needs to cross multi-hole large-span continuous (rigid frame) beams. If the traditional disassembly and assembly through-hole construction method is used, it will not only require a lot of manpower and material resources, but also be slow, affecting the overall construction progress. At present, there is no mature large-tonnage mobile support bridge-building machine continuous through-hole large-span continuous (rigid frame) beam construction method for reference in China. Summary of the invention

[0003] The present invention provides a process method for a large-span bridge-building machine and a large-span composite beam to continuously pass through holes, thereby ensuring that the fulcrums of the large-span bridge-building machine are reasonably arranged and adjusted, and the force distribution of the multi-hole large-span composite beam is reasonable; the forward moving device is used to drive the large-span bridge-building machine to slide through the hole, and there is no need to dismantle the large-span bridge-building machine and then reassemble it, so the equipment investment is small, the cost is low, and the construction is safer and more controllable; continuous sliding through the hole can be achieved, the construction progress is fast, and the impact on the existing line and the surrounding traffic environment is reduced.

[0004] The large-span bridge-building machine provided by the present invention can move along the guide rails laid on the multi-hole large-span composite beam, and the large-span bridge-building machine comprises: a bridge-building machine body, a forward moving device capable of moving along the guide rails, a supporting device for supporting the bridge-building machine body, and a power device;

[0005] The bridge-building machine body comprises: two main trusses arranged in parallel along the extension direction of the composite beam, a flat joint assembly arranged at the front and rear ends of the two main trusses for stabilizing the two main trusses, and a front guide beam arranged at the front ends of the two main trusses for assisting in moving the through-hole;

[0006] The forward moving device comprises: a front fulcrum trolley and a rear fulcrum trolley respectively having bottom wheels, the front fulcrum trolley can be detachably mounted on the lower edge of the front guide beam, and the rear fulcrum trolley can be detachably mounted on the lower edge of the rear ends of the two main trusses, and the front fulcrum trolley and the rear fulcrum trolley can move along the guide rail to drive the bridge-building machine body to move;

[0007] The supporting device comprises: a first rear leg, a middle leg, a second rear leg and a front leg for selectively and movably mounting at the bottom of the two main trusses;

[0008] The power device comprises: a forward moving power device and a reverse moving power device, wherein the forward moving power device can provide power for the forward moving device to move, and the reverse moving power device can provide power for reversing the supporting device during the through-hole process.

[0009] Preferably, a plurality of shoulder beams capable of moving along the two main trusses are arranged between the upper edges of the two main trusses and are perpendicular to the two main trusses.

[0010] Preferably, the forward moving force device includes driving motors respectively installed on the front fulcrum trolley and the rear fulcrum trolley; the reverse moving force device includes: a motor driving the shoulder pole beam to move; a rotating overhead crane device installed between any two shoulder pole beams, used to reverse the supporting device along with the movement of the two shoulder pole beams.

[0011] Preferably, the forward moving device further comprises a plurality of forward moving brackets installed on the lower edges of the two main trusses and capable of moving along the guide rails.

[0012] Preferably, the first rear support leg, the middle support leg, the second rear support leg and the front support leg are respectively used to be movably mounted on the lower edges of the two main trusses through roller frames, so that when the bridge-building machine body is supported by one or more of the first rear support leg, the middle support leg, the second rear support leg and the front support leg, the bridge-building machine body can move forward along the guide rail driven by the front fulcrum trolley and the rear fulcrum trolley.

[0013] Preferably, the lower edges of the two main trusses are provided with jack lifting devices capable of respectively lifting the front and rear ends of the two main trusses to install the front fulcrum trolley and the rear fulcrum trolley.

[0014] On the other hand, the present invention also provides a process method for continuous through-hole passing of large-span composite beams, the process method comprising: a large-span bridge-building machine through-hole preparation stage, a large-span composite beam continuous through-hole passing stage and a large-span bridge-building machine in-place beam preparation stage.

[0015] Preferably, the through-hole preparation stage of the large-span bridge-building machine includes: S101) laying through-hole guide rails on the completed combined beam; S102) lifting the front guide beam and the tail end of the bridge-building machine body respectively, and then installing the front fulcrum trolley and the rear fulcrum trolley at the bottom of the front guide beam and the bottom of the tail end of the bridge-building machine body respectively, and installing the first rear support leg, the middle support leg, and the second rear support leg in sequence along the direction of the bridge between the rear fulcrum trolley and the front fulcrum trolley at the bottom of the bridge-building machine body; S103) arranging and installing stress and strain detection elements at the most unfavorable section position of the combined beam.

[0016] Preferably, the continuous through-hole stage of the large-span composite beam includes: S201) transporting the first rear support leg upside down and crossing it between the middle support leg and the second rear support leg to support the bridge-building machine body, and dragging the bridge-building machine body forward by the forward moving device for a first predetermined distance; S202) after lifting the rear support trolley, removing the middle support leg; S203) transporting the first rear support leg upside down and crossing the second rear support leg, and continuing to drag the bridge-building machine body forward by the forward moving device for a second predetermined distance; S204) transporting the second rear support leg upside down and crossing the first rear support leg, and continuing to drag the bridge-building machine body forward by the forward moving device for a third predetermined distance; S205) looping through steps S203) to S204) until the bridge-building machine body is dragged through the erected multi-hole composite beam.

[0017] Preferably, the large-span bridge-building machine's arrival at the beam-erecting preparation stage specifically includes: S301) removing the front fulcrum trolley, and installing the front support leg at the bottom of the head end of the front guide beam, so that the front support leg is supported at the first main pier position of the beam section to be erected; S302) dragging the bridge-building machine body, so that the first rear support leg and the second rear support leg are respectively arranged at the positions on both sides of the last main pier of the assembled beam that has been erected; S303) waiting for the front support leg to move to the second main pier position of the beam section to be erected, installing and anchoring the middle support leg at the first main pier position; S304) removing the rear fulcrum trolley and the second rear support leg, and continuing to drag the bridge-building machine body forward by the forward moving device, so that the front support leg is supported at the third main pier position of the beam section to be erected, the middle support leg is supported at the second main pier position of the beam section to be erected, and the first rear support leg is supported at the first main pier position of the beam section to be erected, so as to prepare for beam erection.

[0018] The present invention provides a large-span bridge-building machine and a process method for continuous through-hole construction of a large-span composite beam. The large-span bridge-building machine includes: a bridge-building machine body, a forward-moving device capable of traveling along the guide rail, a support device for supporting the bridge-building machine body, and a power device. The forward-moving device includes: a front fulcrum trolley and a rear fulcrum trolley respectively having bottom wheels. After the support device is arranged, the front fulcrum trolley and the rear fulcrum trolley are used to drive the large-span bridge-building machine to slide through the hole, which speeds up the construction progress and reduces the impact on the existing line and the surrounding traffic environment. The power device includes: a forward-moving power device and a reverse-moving power device. The forward-moving power device can provide power for the movement of the forward-moving device, and the reverse-moving power device can provide power for reversing the support device during the through-hole construction process. The support device includes: a movable device for selectively installing The first rear leg, the middle leg, the second rear leg and the front leg installed at the bottom of the two main trusses can selectively transport and install the first rear leg, the middle leg, the second rear leg and the front leg according to the stress condition of the multi-hole large-span composite beam, and reasonably arrange and adjust the fulcrum of the large-span bridge-building machine, so that when the large-span bridge-building machine is passing through the hole, the stress distribution of the multi-hole large-span composite beam is reasonable, and there is no need to dismantle the large-span bridge-building machine and then reassemble it, so the equipment investment is small, the cost is low, and the construction is safer and controllable. The process method for continuous through-hole passing of the large-span composite beam ensures that the fulcrum of the large-span bridge-building machine is reasonably arranged and adjusted by adjusting the installation quantity and position of the supporting device at each stage, and the force distribution of the multi-hole large-span composite beam is reasonable; the forward moving device is used to drive the large-span bridge-building machine to slide through the hole, and there is no need to dismantle the large-span bridge-building machine and then reassemble it, so the equipment investment is small, the cost is low, and the construction is safer and more controllable; continuous through-hole sliding can be achieved, the construction progress is fast, and the impact on the existing line and the surrounding traffic environment is reduced.

[0019] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings:

[0021] Figure 1 is a schematic structural diagram of a large-span bridge-building machine according to an embodiment of the present invention;

[0022] Figure 2 It is a schematic diagram of a through-hole preparation stage in a process method for continuous through-holes in a large-span composite beam according to an embodiment of the present invention;

[0023] Figure 3 It is a schematic diagram before disassembling the middle leg in the through-hole stage in the process method for continuous through-hole of a large-span composite beam according to an embodiment of the present invention;

[0024] Figure 4 It is a schematic diagram after the middle leg is disassembled in the through-hole stage in the process method for continuous through-hole of a large-span composite beam according to an embodiment of the present invention;

[0025] Figure 5 It is a schematic diagram of the beam erection preparation stage S301-S302 in the process method for continuous through-hole of a large-span composite beam according to an embodiment of the present invention;

[0026] Figure 6 3 is a schematic diagram of the beam erection preparation stage S303 in the process method for continuous through-holes of a large-span composite beam according to an embodiment of the present invention;

[0027] Figure 7 is a schematic diagram of the beam erection preparation stage S304 in the process method for continuous through-holes of a large-span composite beam according to an embodiment of the present invention;

[0028] Figure 8 It is a schematic diagram of the cross-section arrangement of stress and strain testing in the process method for continuous through-holes in a large-span composite beam according to an embodiment of the present invention.

[0029] Description of Reference Numerals

[0030] 1 Bridge machine body 101 Main truss

[0031] 102 Front guide beam 2 Front support trolley

[0032] 3 Rear fulcrum trolley 4 Slewing crane device

[0033] 5 Middle outrigger 6 First rear outrigger

[0034] 7 Second rear outrigger 8 Front outrigger DETAILED DESCRIPTION

[0035] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0036] The technical solutions in the embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0037] like Figure 1-Figure 8As shown, the large-span bridge-building machine provided by the present invention can move along the guide rails laid on the multi-hole large-span composite beam, and the large-span bridge-building machine comprises: a bridge-building machine body 1, a forward moving device capable of moving along the guide rails, a supporting device for supporting the bridge-building machine body 1, and a power device;

[0038] The bridge-building machine body 1 comprises: two main trusses 101 arranged in parallel along the extension direction of the composite beam, a flat joint assembly arranged at the front and rear ends of the two main trusses 101 for stabilizing the two main trusses 101, and a front guide beam 102 arranged at the front ends of the two main trusses 101 for assisting in moving the through-hole;

[0039] The forward moving device comprises: a front fulcrum trolley 2 and a rear fulcrum trolley 3 respectively having bottom wheels, the front fulcrum trolley 2 can be detachably mounted on the lower edge of the front guide beam 102, and the rear fulcrum trolley 3 can be detachably mounted on the lower edge of the rear ends of the two main trusses 101, and the front fulcrum trolley 2 and the rear fulcrum trolley 3 can move along the guide rails to drive the bridge-building machine body 1 to move;

[0040] The supporting device comprises: a first rear leg 6, a middle leg 5, a second rear leg 7 and a front leg 8 for selectively and movably mounting at the bottom of the two main trusses 101;

[0041] The power device comprises: a forward moving power device and a reverse moving power device, wherein the forward moving power device can provide power for the forward moving device to move, and the reverse moving power device can provide power for reversing the supporting device during the through-hole process.

[0042] In bridge construction, the space between two piers is called a hole. The farther the distance between the two piers, the larger the span of the beam erected on the two piers, which is called a long-span beam. During the construction process, the long-span bridge-building machine needs to cross multi-hole long-span composite beams, and the long-span bridge-building machine is a large-tonnage mobile support bridge-building machine. In order to avoid large bending moments and stresses in multi-hole long-span composite beams, which may cause damage or even accidents, the bridge-building machine usually needs to be disassembled through the hole, which requires a lot of manpower and material resources, slows the construction speed, and affects the overall construction progress.

[0043] According to the technical solution of the present invention, the large-span bridge-building machine includes: a bridge-building machine body 1, a forward moving device capable of walking along the guide rail, a supporting device for supporting the bridge-building machine body 1, and a power device. The supporting device includes: a first rear support leg 6, a middle support leg 5, a second rear support leg 7, and a front support leg 8 for selectively and movably mounting at the bottom of the two main trusses 101; the first rear support leg 6, the middle support leg 5, the second rear support leg 7, and the front support leg 8 can be selectively reversed and installed according to the stress conditions of the multi-hole large-span composite beam, and the fulcrum of the large-span bridge-building machine can be reasonably arranged and adjusted, so that during the process of the large-span bridge-building machine passing through the hole, the stress distribution of the multi-hole large-span composite beam is reasonable, and the large-span bridge-building machine does not need to be dismantled and reassembled, with less equipment investment, low cost, and safer and more controllable construction.

[0044] The forward moving device includes: a front fulcrum trolley 2 and a rear fulcrum trolley 3 respectively having bottom wheels. After the support device is arranged, the front fulcrum trolley 2 and the rear fulcrum trolley 3 are used to drive the large-span bridge-building machine to slide through the hole, which speeds up the construction progress and reduces the impact on the existing line and the surrounding traffic environment.

[0045] According to an embodiment of the present invention, preferably, a plurality of shoulder pole beams capable of moving along the two main trusses 101 are arranged between the upper edges of the two main trusses 101 and are perpendicular to the two main trusses 101. The shoulder pole beam is used to install a suspension device, and a moving roller group is arranged between the shoulder pole beam and the two main trusses 101 to achieve the movement of the shoulder pole beam. The moving roller group is directly driven to rotate by a motor to achieve the movement of the shoulder pole beam; or a winch is further arranged on the two main trusses 101 to pull the shoulder pole beam to move along the two main trusses 101.

[0046] After installing the supporting device, the shoulder pole beam can be disassembled to reduce the weight of the large-span bridge-building machine through the hole. After the through-hole is completed, it can be installed again to carry out the next stage of transportation and installation of the supporting device.

[0047] According to the technical solution of the present invention, the power device includes: a forward moving force device and a reverse moving force device, the forward moving force device can provide power for the forward moving device to move, and the reverse moving force device can provide power for reversing the supporting device during the through-hole process.

[0048] According to one embodiment of the present invention, preferably, the forward moving power device includes driving motors respectively installed on the front fulcrum trolley 2 and the rear fulcrum trolley 3; the reverse moving power device includes: a motor driving the shoulder pole beam to move; a slewing crane device 4 installed between any two shoulder pole beams, used to move and reverse the support device along with the two shoulder pole beams. The slewing crane device 4 can suspend the support device and adjust the direction of rotation. When the shoulder pole beam moves along the two main trusses 101, the slewing crane device 4 can suspend the support device and move along with the shoulder pole beam to realize the reverse transportation of the support device, which is flexible and convenient to operate.

[0049] According to one embodiment of the present invention, preferably, the forward moving device also includes a plurality of forward moving brackets installed on the lower edges of the two main trusses 101 and capable of moving along the guide rails, so as to increase the stability of the two main trusses 101 during the movement of the large-span bridge-building machine.

[0050] According to one embodiment of the present invention, preferably, the first rear leg 6, the middle leg 5, the second rear leg 7 and the front leg 8 are respectively used to be movably installed on the lower edge of the two main trusses 101 through roller frames, so that when the bridge-building machine body 1 is supported by one or more of the first rear leg 6, the middle leg 5, the second rear leg 7 and the front leg 8, the bridge-building machine body 1 can move forward along the guide rail driven by the front support trolley 2 and the rear support trolley 3. The first rear leg 6, the middle leg 5, the second rear leg 7 and the front leg 8 used can support the weak stress position of the multi-hole long-span composite beam to ensure that the stress distribution of the multi-hole long-span composite beam is reasonable during the movement of the large-span bridge-building machine, and the construction is safer and more controllable.

[0051] According to one embodiment of the present invention, preferably, the lower edges of the two main trusses 101 are provided with jack lifting devices which can respectively lift the front and rear ends of the two main trusses 101 to install the front fulcrum trolley 2 and the rear fulcrum trolley 3. During the disassembly, transportation and installation of the supporting device, it is necessary to use the lifting device to lift the head or tail end of the two main trusses 101 for easy operation.

[0052] On the other hand, the present invention also provides a process method for continuous through-holes of large-span composite beams, the process method includes: a preparation stage for large-span bridge-building machine through-holes, a continuous through-holes stage for large-span composite beams, and a preparation stage for large-span bridge-building machine to put in place and erect beams. In each stage, by adjusting the number and position of the support devices installed, it is ensured that the fulcrum of the large-span bridge-building machine is reasonably arranged and adjusted, and the force distribution of the multi-hole large-span composite beam is reasonable; the forward moving device is used to drive the large-span bridge-building machine to slide through the hole, and there is no need to dismantle the large-span bridge-building machine and then reassemble it, so the equipment investment is small, the cost is low, and the construction is safer and more controllable; it can achieve continuous through-hole sliding, the construction progress is fast, and the impact on the existing line and the surrounding traffic environment is reduced.

[0053] According to one embodiment of the present invention, Figure 2 As shown, preferably, the through-hole preparation stage of the large-span bridge-building machine includes: S101) laying a through-hole guide rail on the completed composite beam; S102) respectively lifting the front guide beam 102) and the tail end of the bridge-building machine body 1, and then installing the front fulcrum trolley 2 and the rear fulcrum trolley 3 at the bottom of the front guide beam 102 and the bottom of the tail end of the bridge-building machine body 1, respectively, and installing the first rear support leg 6, the middle support leg 5, and the second rear support leg 7 in sequence along the bridge direction between the rear fulcrum trolley 3 and the front fulcrum trolley 2 at the bottom of the bridge-building machine body 1; S103) arranging and installing stress and strain detection elements at the most unfavorable section position of the composite beam.

[0054] In S101), when laying the through-hole guide rail on the completed composite beam, it is necessary to carry out lofting measurement of the center line and elevation of the beam surface, and to process the elevation that does not meet the requirements, grind the high places, and level the low places with support grouting material. After confirmation, lay the rails and fix them with fasteners.

[0055] In S103), the stress and strain detection elements are arranged and installed at the most unfavorable section position of the composite beam. First, the fulcrum positions required by the large-span bridge-building machine under various working conditions are determined. The maximum stress, maximum stress increment, maximum shear stress, maximum shear stress increment and maximum deflection of the upper and lower flanges at the most unfavorable section of the multi-hole large-span composite beam are calculated and compared with the theoretical values ​​in the specifications to verify the theoretical feasibility of the through-hole.

[0056] According to the characteristics of the maximum positive bending moment in the porous large-span composite beam and the negative bending moment at the support, the stress and deflection of the mid-span and support sections of the porous large-span composite beam are monitored. The shear force on the web at 1 / 4 of the side span is large and prone to cracking, so the web at 1 / 4 of the side span is also taken into account when measuring stress. Based on the above characteristics, the strain and deflection observation points are arranged: the stress and strain test sections are the 1 / 4 section of the side span of the porous large-span composite beam, the main pier beam surface section, and the mid-span section of the middle span (such as Figure 8 The measuring points of sections A and E are located on the inner side of the web of the box beam, and four JMZX211-23 type strain gauges are attached to each section. The measuring points of sections B and D are located above the web of the beam surface, and two JMZX211-23 type strain gauges are attached to each section. The measuring points of section C are located above the bottom plate of the box, and three JMZX211-23 type strain gauges are attached to each section. The deflection monitoring sections are located in the middle section of each span, and the measuring points are arranged on the top surface of the beam, and two elevation observation piles are embedded in each section.

[0057] According to one embodiment of the present invention, preferably, the continuous through-hole stage of the large-span composite beam includes: S201) The first rear leg 6 is reversed and crossed over between the middle leg 5 and the second rear leg 7 to support the bridge-building machine body 1, and the bridge-building machine body 1 is dragged forward by the first predetermined distance through the forward moving device; S202) After lifting the rear fulcrum trolley 3, the middle leg 5 is removed; S203) The first rear leg 6 is reversed and crossed over the second rear leg 7, and the bridge-building machine body 1 is continued to be dragged forward by the second predetermined distance through the forward moving device; S204) The second rear leg 7 is reversed and crossed over the first rear leg 6, and the bridge-building machine body 1 is continued to be dragged forward by the third predetermined distance through the forward moving device; S205) Steps S203) to S204) are executed repeatedly until the bridge-building machine body 1 is dragged to pass through the erected multi-hole composite beam. (such as Figure 3 , Figure 4 (shown)

[0058] According to one embodiment of the present invention, preferably, the preparation stage of the large-span bridge-building machine for erecting beams in place specifically includes: S301) removing the front fulcrum trolley 2, and installing the front support leg 8 at the bottom of the head end of the front guide beam, so that the front support leg 8 is supported at the first main pier position of the beam section to be erected; S302) dragging the bridge-building machine body 1, so that the first rear support leg 6 and the second rear support leg 7 are respectively arranged at the positions on both sides of the last main pier of the assembled beam that has been erected (such as Figure 5 S303) When the front leg 8 moves to the second main pier position of the beam section to be erected, the middle leg 5 is installed and anchored at the first main pier position (as shown in Figure 6S304) remove the rear fulcrum trolley 3 and the second rear leg 7, and continue to drag the bridge-building machine body 1 forward through the forward moving device, so that the front leg 8 is supported at the third main pier position of the beam section to be erected, the middle leg 5 is supported at the second main pier position of the beam section to be erected, and the first rear leg 6 is supported at the first main pier position of the beam section to be erected, so as to prepare for beam erection (as shown in FIG. Figure 7 shown).

[0059] The purpose of the present invention is to provide a large-span bridge-building machine and a process method for continuous through-hole construction of a large-span composite beam. The large-span bridge-building machine includes: a bridge-building machine body 1, a forward-moving device capable of walking along the guide rail, a support device for supporting the bridge-building machine body 1, and a power device. The forward-moving device includes: a front fulcrum trolley 2 and a rear fulcrum trolley 3 respectively having bottom wheels. After the support device is arranged, the front fulcrum trolley 2 and the rear fulcrum trolley 3 are used to drive the large-span bridge-building machine to slide through the hole, which speeds up the construction progress and reduces the impact on the existing line and the surrounding traffic environment; the power device includes: a forward-moving power device and a reverse-moving power device. The forward-moving power device can provide power for the movement of the forward-moving device, and the reverse-moving power device can provide power for reversing the support device during the through-hole construction process; the support device includes: a device for selectively and movably installing on the The first rear leg 6, the middle leg 5, the second rear leg 7 and the front leg 8 at the bottom of the two main trusses 101 can selectively transport and install the first rear leg 6, the middle leg 5, the second rear leg 7 and the front leg 8 according to the stress condition of the multi-hole large-span composite beam, and reasonably arrange and adjust the fulcrum of the large-span bridge-building machine, so that when the large-span bridge-building machine is passing through the hole, the stress distribution of the multi-hole large-span composite beam is reasonable, and there is no need to dismantle the large-span bridge-building machine and then reassemble it, which reduces the equipment investment, reduces the cost, and makes the construction safer and more controllable. The process method for continuous through-hole passing of the large-span composite beam ensures that the fulcrum of the large-span bridge-building machine is reasonably arranged and adjusted by adjusting the installation quantity and position of the supporting device at each stage, and the force distribution of the multi-hole large-span composite beam is reasonable; the forward moving device is used to drive the large-span bridge-building machine to slide through the hole, and there is no need to dismantle the large-span bridge-building machine and then reassemble it, so the equipment investment is small, the cost is low, and the construction is safer and more controllable; continuous through-hole sliding can be achieved, the construction progress is fast, and the impact on the existing line and the surrounding traffic environment is reduced.

[0060] The optional implementation modes of the embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above implementation modes. Within the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical scheme of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.

[0061] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not further describe various possible combinations.

[0062] In addition, various implementation modes of the embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the embodiments of the present invention, they should also be regarded as the contents disclosed by the embodiments of the present invention.

Claims

1. A large-span bridge-building machine, which can move along a guide rail laid on a multi-hole large-span composite beam, characterized in that: The large-span bridge-building machine comprises: A bridge-building machine body (1), a forward moving device capable of moving along the guide rail, a supporting device for supporting the bridge-building machine body (1), and a power device; The bridge-building machine body (1) comprises: two main trusses (101) arranged in parallel along the extension direction of the composite beam, a flat joint assembly arranged at the front and rear ends of the two main trusses (101) for stabilizing the two main trusses (101), and a front guide beam (102) arranged at the front ends of the two main trusses (101) for assisting in moving through holes, and a plurality of shoulder beams capable of moving along the two main trusses (101) are arranged at intervals between the upper edges of the two main trusses (101) and are perpendicular to the two main trusses (101); The forward moving device comprises: a front fulcrum trolley (2) and a rear fulcrum trolley (3) each having a bottom wheel, and a plurality of forward moving brackets mounted on the lower edges of the two main trusses (101) and capable of moving along the guide rail, wherein the front fulcrum trolley (2) is detachably mounted on the lower edge of the front guide beam (102), and the rear fulcrum trolley (3) is detachably mounted on the lower edge of the rear ends of the two main trusses (101), and the front fulcrum trolley (2) and the rear fulcrum trolley (3) are capable of moving along the guide rail, thereby driving the bridge-building machine body (1) to move; The supporting device comprises: a first rear support leg (6), a middle support leg (5), a second rear support leg (7) and a front support leg (8) which are selectively and movably mounted on the bottom of the two main trusses (101); The power device comprises: a forward moving power device and a reverse moving power device, wherein the forward moving power device can provide power for the forward moving device to move, and the reverse moving power device can provide power for the reverse movement of the supporting device during the through-hole process; The forward moving force device comprises drive motors respectively mounted on the front fulcrum trolley (2) and the rear fulcrum trolley (3); The reverse motion device comprises: a motor for driving the shoulder pole beam to move; and a revolving crane device (4) installed between any two shoulder pole beams and used for reversing the support device along with the movement of the two shoulder pole beams.

2. The long-span bridge-building machine according to claim 1, characterized in that: The first rear support leg (6), the middle support leg (5), the second rear support leg (7) and the front support leg (8) are respectively used to be movably mounted on the lower edges of the two main trusses (101) through roller frames, so that when the bridge-building machine body (1) is supported by one or more of the first rear support leg (6), the middle support leg (5), the second rear support leg (7) and the front support leg (8), the bridge-building machine body (1) can be driven by the front support trolley (2) and the rear support trolley (3) to move forward along the guide rail.

3. The long-span bridge-building machine according to claim 1, characterized in that: The lower edges of the two main trusses (101) are provided with jack lifting devices capable of respectively lifting the front and rear ends of the two main trusses (101) to install the front fulcrum trolley (2) and the rear fulcrum trolley (3).

4. A process for continuous through-holes in a large-span composite beam, characterized in that: The process method comprises using the large-span bridge-building machine described in any one of claims 1 to 3 to continuously pass holes in large-span composite beams, and the process method comprises: a large-span bridge-building machine passing holes preparation stage, a large-span composite beam continuous passing hole stage, and a large-span bridge-building machine in place beam erection preparation stage.

5. The process according to claim 4, characterized in that: The large-span bridge construction machine through-hole preparation stage includes: S101) Laying a through-hole guide rail on the completed composite beam; S102) respectively lift the front guide beam (102) and the tail end of the bridge-building machine body (1), then respectively install the front support trolley (2) and the rear support trolley (3) at the bottom of the front guide beam (102) and the bottom of the tail end of the bridge-building machine body (1), and install the first rear support leg (6), the middle support leg (5), and the second rear support leg (7) in sequence along the bridge-aligning direction between the rear support trolley (3) and the front support trolley (2) at the bottom of the bridge-building machine body (1); S103) Arranging and installing stress and strain detection elements at the most unfavorable cross-section position of the composite beam.

6. The process according to claim 4, characterized in that: The continuous hole-passing stage of the large-span composite beam includes: S201) transporting the first rear leg (6) backwards and across between the middle leg (5) and the second rear leg (7) to support the bridge-building machine body (1), and dragging the bridge-building machine body (1) forwards a first predetermined distance by means of the forward moving device; S202) After lifting the rear fulcrum trolley (3), disassembling the middle support leg (5); S203) transporting the first rear support leg (6) backwards and over the second rear support leg (7), and continuing to drag the bridge-building machine body (1) forwards by the forward moving device for a second predetermined distance; S204) transporting the second rear support leg (7) backwards to cross over the first rear support leg (6), and continuing to drag the bridge-building machine body (1) forwards by the forward moving device for a third predetermined distance; S205) loops through steps S203) to S204) until the bridge-building machine body (1) is dragged to pass through the erected multi-hole composite beam.

7. The process according to claim 4, characterized in that: The preparation stage for the large-span bridge-building machine to erect beams in place specifically includes: S301) removing the front support trolley (2), and installing a front support leg (8) at the bottom of the head end of the front guide beam, so that the front support leg (8) is supported at the first main pier position of the beam section to be erected; S302) dragging the bridge-building machine body (1) so that the first rear support leg (6) and the second rear support leg (7) are respectively arranged at the positions on both sides of the last main pier of the assembled beam that has been erected; S303) After the front support leg (8) moves to the second main pier position of the beam section to be erected, the middle support leg (5) is installed and anchored at the first main pier position; S304) The rear support trolley (3) and the second rear support leg (7) are removed, and the bridge-building machine body (1) is continued to be dragged forward by the forward moving device, so that the front support leg (8) is supported at the third main pier position of the section to be erected, the middle support leg (5) is supported at the second main pier position of the section to be erected, and the first rear support leg (6) is supported at the first main pier position of the section to be erected, so as to prepare for erecting the beam.

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