CN117026840B

CN117026840B - Construction method for splicing and pushing steel box girders crossing high-speed curves

Info

Publication number: CN117026840B
Application number: CN202311086167.XA
Authority: CN
Inventors: 尉强; 陆玉春; 何鹏; 王柏荣; 李晟; 李庆斌; 谭福兵; 徐天爱; 张建辉; 韩育刚; 韩思文; 宗仁栋; 秦坚; 林建敏; 蒋符发; 贺良; 肖君枝; 梁钦欢; 汤德品; 谢松凌
Original assignee: China Railway Communications Investment Group Co ltd; Guangxi Guitong Engineering Management Group Co ltd; Guangxi Shangheng Expressway Co ltd; Fifth Engineering Co Ltd of Shanghai Civil Engineering Co Ltd of CREC
Current assignee: China Railway Communications Investment Group Co ltd; Guangxi Guitong Engineering Management Group Co ltd; Guangxi Shangheng Expressway Co ltd; Fifth Engineering Co Ltd of Shanghai Civil Engineering Co Ltd of CREC
Priority date: 2023-08-28
Filing date: 2023-08-28
Publication date: 2024-06-18
Anticipated expiration: 2043-08-28
Also published as: CN117026840A

Abstract

The invention provides a construction method for splicing and pushing a cross-high-speed curve steel box girder, which comprises the following steps: s1, dividing a steel box girder into a plurality of steel box girder body sections, wherein each steel box girder body section is divided into a left steel box girder body section and a right steel box girder body section for prefabrication; constructing an assembling jig frame, wherein the assembling jig frame comprises a linear slideway and a curve slideway; s2, after the assembly of the beam body section of the steel box beam at the front end and the guide beam is completed, the jack pushing device pushes one section length forwards; s3, continuing to assemble the beam body section of the steel box girder of the later section, utilizing a reverse pulling device to enable the assembled beam body section of the steel box girder to be pulled to the rear end of the parent girder along a linear slideway, welding, utilizing a pushing jack device to push the assembled beam body section of the steel box girder forward along the curved slideway, and repeating the operation of the step S3 until the full-bridge steel box girder is pushed to a design position. The construction efficiency of the curve steel box girder can be effectively improved by adopting the method, and the construction safety of the curve steel box girder is ensured.

Description

Construction method for splicing and pushing steel box girders crossing high-speed curves

Technical Field

The invention relates to the technical field of steel box girder pushing, in particular to a method for splicing and pushing a cross-high-speed curve steel box girder.

Background

In recent years, highway construction industry in China rapidly develops, the bridge construction scale as an important component of highway construction is continuously enlarged, the construction speed is also accelerated, the pushing technology of the steel box girder of the highway bridge plays a very key role in road construction, and the construction is rapid and convenient, so that labor force and equipment are greatly saved, meanwhile, the force of the girder body in the horizontal direction for reciprocative property generated by the pier body during pushing is overcome, the displacement of the pier top can be reduced to the minimum by continuous pushing, and the construction quality of the bridge body is ensured, so that the method is widely applied.

At present, the steel box girder pushing construction technology is more used for working conditions of straight steel box girder pushing, and for curved working conditions, a series of problems still exist at present: (1) Because the steel box girder body section has a certain curvature, the steel box girder body section occupies larger space than the straight steel box girder body section, and therefore, the transportation link has higher requirement on the vehicle body; (2) After the welding of the assembly jig frame is completed, the steel box girder body section needs to be moved to the rear end of the upper section of steel box girder body section for contraposition welding, if the traditional linear steel box girder mode is still adopted, namely, a jack is pushed, and a sliding shoe is matched with a method of limiting sliding on a slideway, so that the distance of each movement is limited by matching with a curve linear slideway, and the plane gesture of a steel girder needs to be continuously adjusted by adopting the jack, so that the working efficiency is low; (3) The pushing construction process by adopting the pushing jack generally comprises pushing, correcting and beam falling, and in the pushing process, whether the curve steel box beam needs correcting or correcting amount often depends on subjective judgment of field personnel.

Therefore, further research on the construction method of the curved steel box girder is necessary.

Disclosure of Invention

The invention provides a construction method for splicing and pushing a high-speed curve steel box girder, which can effectively improve the construction efficiency of the curve steel box girder.

In order to achieve the above purpose, the technical scheme of the invention is as follows:

a construction method for splicing and pushing a cross-high-speed curve steel box girder comprises the following steps:

S1, dividing a steel box girder into a plurality of steel box girder body sections, wherein each steel box girder body section is divided into a left steel box girder body section and a right steel box girder body section for prefabrication, and the prefabrication is completed and transported to a construction site; constructing an assembling jig frame on the pushing starting point, wherein the assembling jig frame comprises a linear slideway and a curve slideway, and a pushing jack device is arranged at a design position;

S2, on an assembly jig frame, assembling the left steel box girder body section and the right steel box girder body section at the front end together, and pushing one section length forwards by using a jack pushing device after the steel box girder body section and the guide girder at the front end are assembled;

S3, continuously assembling the steel box girder body section of the later section at the rear end of the assembly jig frame, utilizing a reverse pulling device to enable the assembled steel box girder body section to be pulled to the rear end of the parent girder along a linear slideway, welding, utilizing a pushing jack device to push the assembled steel box girder body part forwards along the curved slideway, and repeating the operation of the step S3 until the full-bridge steel box girder is pushed to a design position.

Further, the assembly jig frame is arranged in a block assembly area and a beam end welding area, and the block assembly area is arranged at the rear end of the beam end welding area;

The assembly jig comprises a curve slideway, a linear slideway, a first upright post, a second upright post and a concrete expansion foundation, wherein: the two curved slideways extend in the preset curved sliding direction of the steel box girder, and the first upright post is arranged below the curved slideways; the linear slideways are arranged at two sides of each curve slideway in the block assembly area at intervals, the girder body section of the steel box girder is guided to be pulled to a design position, and the second upright post is arranged below the girder body section; the concrete enlarged foundation is arranged below the first upright and the second upright.

Further, a cross connection is connected between the first upright post and the second upright post, and between the second upright post and the second upright post, which are adjacent to each other in the transverse direction.

Further, the device also comprises a slideway supporting jack which is arranged below the linear slideway at the outer side of the curve slideway at intervals; and a concrete expansion foundation is arranged below the slideway supporting jack.

Further, the reverse pulling device comprises two sets of reverse pulling mechanisms, each set of reverse pulling mechanism comprises a steel clamping seat, a reaction frame, a horizontal penetrating jack and a supporting seat, wherein: the steel clamping seat is detachably fixed on the tail bottom plate of the girder body section of the steel box girder and is fixedly provided with an anchor; the reaction frame is fixed on the outer side of the curve slideway or the straight slideway and comprises a seal head plate and a reaction frame stiffening plate, wherein the seal head plate is provided with a seal head plate through hole in a penetrating manner, and one side close to the steel clamping seat is transversely fixed with the reaction frame stiffening plate; the support seat is arranged on one side of the reaction frame, which is far away from the steel clamping seat, and the horizontal center-penetrating jack is arranged on the support seat;

A polytetrafluoroethylene sliding plate is arranged below the assembled steel box girder body section, and a steel backing plate is arranged below the polytetrafluoroethylene sliding plate to ensure that the steel box girder body section is assembled and welded at a proper height position; after the steel box girder body sections are assembled, the rear ends of the steel strands penetrate through an anchorage device and are fixed, steel clamping seats are fixed at the rear ends of bottom plates at the tail parts of the steel box girder body sections, the front ends of the steel strands penetrate through a counter-force frame and are installed in horizontal penetrating jacks, and the horizontal penetrating jacks positioned at the left side and the right side of an assembly jig frame respectively pull the steel strands, so that the steel box girder body sections slide to the designed positions along linear slideways.

Further, the steel clamp comprises a clamp base plate, clamp base plates and clamp stiffening plates, wherein two clamp base plates are arranged, the two clamp base plates are transversely fixed on one side of the clamp base plate at intervals and can be matched and clamped with the bottom plate at the tail part of the steel box girder, an anchor is fixed on the other side of the clamp base plate, and clamp base through holes for matching steel strands to penetrate through the anchor are penetrated; one side of the clamping seat stiffening plate is connected with one side of the clamping seat base plate, and the other side of the clamping seat stiffening plate is connected with the clamping seat clamping plate positioned below.

Further, the pushing jack device comprises a rectifying pushing jack and an angle adjusting pushing jack, wherein the rectifying pushing jack comprises a sliding box, a jack slideway, a jacking jack unit, a transverse rectifying unit and a pushing jack unit; one end of the sliding box is connected with a piston rod of the pushing jack unit or the piston rod of the pushing jack unit passes through the sliding box to drive the sliding box to slide back and forth on a jack slideway; the rear end of the cylinder body of the pushing jack unit is connected with the rear end of the slide box; a jacking jack unit is fixed in the slide box; the two sides of the sliding box are provided with transverse deviation rectifying units, and the outer ends of the transverse deviation rectifying units are fixed on the left side wall and the right side wall of the jack slideway;

the angle adjusting pushing jack is arranged on the front side and the rear side of the correcting pushing jack, an arc-shaped concave groove and a hemispherical body capable of horizontally rotating in the arc-shaped concave groove are arranged in the correcting pushing jack, and a supporting jack is fixed on the hemispherical body;

The deviation rectifying pushing jack and the angle adjusting pushing jack are coordinated to realize pushing of the steel box girder, when the girder body part of the steel box girder deviates from a preset curve line, the extension and the shortening of the transverse deviation rectifying unit are adjusted, so that the sliding box is adjusted in the left-right direction, and the line type sliding adjustment of the girder body part of the steel box girder is realized.

Furthermore, the correcting pushing jack and the angle adjusting pushing jack are provided with supporting devices, and the uppermost layer of each supporting device is a bamboo plywood.

Further, the front end and/or the rear end of the jack slide way are/is marked with a marking line, the marking line at least marks the midpoint of the jack slide way, the outer wall of the steel box girder body section is provided with a transmitting device capable of transmitting light spots at intervals, when the transmitting device passes over the jack slide way, the light spots transmitted by the transmitting device are observed to indicate the midpoint of the jack slide way, if the light spots indicate to the midpoint or the threshold position near the midpoint of the jack slide way, the steel box girder body section is indicated not to deviate, if the light spots do not indicate to exceed the threshold position of the marking line of the jack slide way, the corresponding transverse deviation correcting unit is adjusted to extend or shorten according to the light indication to the left side or the rear side of the midpoint of the jack slide way.

Further, a pushing control system is also arranged;

The area in the marking line threshold range on the jack slideway is marked with one color, the left side or the right side of the marking line threshold range is respectively marked with different colors, and the transmitting device is an optical fiber sensor;

the pushing control system is respectively connected with the optical fiber sensor, the jacking jack unit, the transverse deviation rectifying unit and the pushing jack unit, when the optical fiber sensor detects that the light spot is projected in the threshold range of the marking line, the transverse deviation rectifying unit is not required to be started for rectifying, and when the optical fiber sensor detects that the light spot is projected on the left side or the right side of the threshold range of the marking line, the transverse deviation rectifying unit is started for stretching or shortening to transversely rectify the pushing of the steel box girder.

Further, the temporary buttress comprises a steel pipe upright post, a buttress tie rod and a jack supporting box girder; at least two steel pipe upright posts are respectively arranged on two sides of the permanent buttress; a concrete expansion foundation is poured under the steel pipe upright post, a jack supporting box girder is supported on the steel pipe upright post, or a buttress crossbeam is connected between the tops of the steel pipe upright posts on the same side, and the jack supporting box girder is supported on the buttress crossbeam; the jack supporting box girder is used for supporting the pushing jack device; and a buttress tie bar is transversely connected between the adjacent steel pipe upright posts.

The construction method for splicing and pushing the cross-high-speed curve steel box girder has the following advantages:

(1) According to the invention, the steel box girder is divided into a plurality of steel box girder body sections, and each steel box girder body section is divided into a left steel box girder body section and a right steel box girder body section for prefabrication, so that the weight of single-section girder body transportation is reduced, and the requirements on transportation equipment and hoisting equipment are reduced.

(2) The invention adopts the cooperation of the assembly jig frame and the counter pulling device, the assembly jig frame comprises a curve slideway and a linear slideway, steel backing plates and polytetrafluoroethylene sliding plates are padded on the curve slideway and the linear slideway, and the assembly jig frame is matched with a deviation rectifying pushing jack to support the girder body section of the steel box girder to finish welding assembly; after the welding of the steel box girder body section is finished, when the rear end of the upper section of steel box girder body section is required to be moved, the assembled steel box girder body section is pulled to a designed position in a segmented way along the linear slideway by a counter pulling device by means of a steel pad plate and a polytetrafluoroethylene slide plate on the linear slideway; the assembling jig frame provided with the linear slide rail can prevent the beam body of the curved steel box beam from overturning due to excessive beam body deviation, and can enable the beam body section of the single-section steel box beam to directly slide instead of bending, so that the traction speed is increased, and the construction efficiency is improved.

(3) The invention utilizes the deviation-correcting pushing jack to correct the pushing position of the steel box girder, reduces the difficulty of deviation correction, and simultaneously, the invention also provides the marking line on the deviation-correcting pushing jack, and the invention can conveniently monitor the pushing position of the steel box girder by combining with the transmitting device so as to carry out targeted deviation correction and improve the pushing safety of the steel box girder.

Drawings

Fig. 1 is a schematic view of the front view of a splice jig frame (illustrating the outermost linear ramp portion thereof).

Fig. 2 is a schematic top view of a splice jig frame.

Fig. 3 is a schematic front view of one of the block splicing sections of the splice matrix (illustrating the outermost linear ramp portion thereof).

Fig. 4 is a schematic top view of one of the block splice areas of the splice matrix.

Fig. 5 is a schematic view of the cross-sectional A-A structure of fig. 1.

FIG. 6 is a schematic view of the construction of one of the states of the pushing construction of the present invention.

Fig. 7 is a schematic top view of the road base part of the site in the pushing construction.

Fig. 8 is a schematic structural view of the jack pushing device.

Fig. 9 is a schematic diagram of the front view structure of the rectifying and pushing jack.

Fig. 10 is a schematic top view of fig. 9.

Fig. 11 is a schematic diagram of a front view of the support device placed on the rectifying and pushing jack.

Fig. 12 is a schematic view of the right-hand construction of the support device of fig. 11.

Fig. 13 is a schematic structural view of the connection of the first upright and the curved slideway.

Fig. 14 is a schematic structural view of a steel box girder body segment pulled by a back-pulling device.

Fig. 15 is an enlarged schematic view of the steel clip clamping the bottom plate of the tail of the steel box girder.

Fig. 16 is a schematic view of the right-hand construction of fig. 15 (omitting the steel box girder aft floor and the protective plate).

Fig. 17 is a schematic left-hand view of fig. 15 (omitting the steel box girder aft floor and the protective plate).

Fig. 18 is an enlarged schematic view of the reaction frame in fig. 14.

Fig. 19 is a left-hand structural schematic diagram of fig. 18.

Fig. 20 is a schematic top view of fig. 18.

Fig. 21 is a schematic view of the structure of an embodiment of the reaction frame, horizontal penetration jack and support base.

Figure 22 is a schematic view of the structure of the jack-pushing device and temporary buttress arrangement.

Fig. 23 is a schematic top view of fig. 22.

Figure 24 is a schematic view of an embodiment of a temporary buttress.

Fig. 25 is a schematic left-hand view of fig. 24 (omitting the steel box girder body segments).

Fig. 26 is a schematic top view of the structure of fig. 24 (omitting the steel box girder body segments and the angle-adjusting jack).

Fig. 27 is a schematic view of another embodiment of a temporary pier.

Fig. 28 is a schematic left-hand view of fig. 27 (omitting the steel box girder body segments).

Fig. 29 is a schematic top view of the structure of fig. 27 (omitting the steel box girder body segments and omitting the angle-adjusting jack).

In the figure, a straight slideway 1, a concrete enlarged foundation 2, a second upright 3, a slideway supporting jack 4, a pushing jack device 5, an angle adjusting pushing jack 501, a correcting pushing jack 502, a jack slideway 502a, a transverse correcting unit 502b, a sliding box 502c, a pushing jack unit 502d, a marking line 502e, a steel box girder body section 6, a steel box girder tail bottom plate 601, a first upright 7, a first upright column 701, a first stiffening plate 702, a first upright top plate 703, a cross beam 8, a curve slideway 9, a curve slideway top plate 901, a diaphragm 902, a curve slideway I-steel side plate 903, a guide beam 10, a block assembling area 11, a beam end welding area 12, a steel clamp 13, a clamp base plate 1301, an anchor 1302, a clamp base stiffening plate 1303, a clamp base plate 1304, a clamp base through hole, a slide plate combination 14, a steel clamp 15, a reaction frame 16, a head plate 1601, a reinforcing plate 1602, a baffle frame reaction plate 1603, a plate through hole 1604, a horizontal center penetrating jack 17, a protection plate 23018, a support base plate 1901, a support plate 1901, a steel pipe support plate 23, a mixed support structure support plate 1902, a support plate 2304, a highway support structure 2301, a temporary support beam 2303, a support plate 20, a highway support structure 2, a support beam 2304, a permanent support frame 20, a girder support plate 2304.

Description of the embodiments

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that, the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore, should not be construed as limiting the present invention.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

The construction method for splicing and pushing the cross-high-speed curve steel box girder comprises the following steps as shown in figures 1-7 and 22-23: s1, dividing a steel box girder into a plurality of steel box girder body sections 6, dividing each steel box girder body section 6 into a left steel box girder body section 6 and a right steel box girder body section 6, prefabricating, and transporting to a construction site after prefabrication is completed; and an assembling jig frame is arranged on the pushing starting point, the assembling jig frame comprises a linear slideway 1 and a curve slideway 9, and a pushing jack device 5 is arranged at a design position. S2, on an assembly jig frame, assembling the left steel box girder body section and the right steel box girder body section at the front end together, and pushing one section length forwards by using a jack pushing device 5 after the steel box girder body section 6 and the guide girder 10 at the front end are assembled. S3, continuously assembling the steel box girder body section 6 of the later section at the rear end of the assembly jig frame, utilizing a reverse pulling device to enable the assembled steel box girder body section 6 to be pulled to the rear end of the parent girder along the linear slideway 1, welding, utilizing a pushing jack device 5 to push the assembled steel box girder body part forwards along the curved slideway 9, and repeating the operation of the step S3 until the full-bridge steel box girder is pushed to the design position.

In the embodiment, the steel box girder is divided into a plurality of steel box girder body sections 6, each steel box girder body section 6 is further divided into a left steel box girder body section and a right steel box girder body section for prefabrication, so that the weight of single-section girder body transportation is reduced, and the requirements on transportation equipment and hoisting equipment are reduced. In addition, the assembly jig frame of the embodiment comprises a curve slideway 9 and a linear slideway 1, a slide plate combination 14 is arranged on the curve slideway 9 and the linear slideway 1 in a cushioning mode, the slide plate combination 14 comprises a steel base plate and a polytetrafluoroethylene slide plate, the polytetrafluoroethylene slide plate is arranged on the steel base plate in a cushioning mode, and a correction pushing jack 502 is matched to support a steel box girder body section 6 to finish welding assembly; after the welding of the steel box girder body sections 6 is finished, when the rear end of the steel box girder body section 6 of the previous section is required to be moved, a steel backing plate and a polytetrafluoroethylene sliding plate are padded on the linear slide way 1, and the assembled steel box girder body sections 6 are pulled to the designed position along the linear slide way by a back-pulling device in different linear sections; the assembling jig frame provided with the linear slide way 1 can prevent the beam body of the curved steel box girder from overturning due to excessive beam body deviation, and can enable the single-section steel box girder body section 6 to directly slide instead of bending, so that the pulling speed is increased, and the construction efficiency is improved. The matching of the linear slide way 1 and the curve slide way 9 effectively improves the working efficiency of pulling the single-section steel box girder Liang Tiqian into position under the curve working condition, and can complete the pushing in-position construction of the curve steel box girder body in a matching way.

Further, as shown in fig. 6 and 7, the splicing jig is arranged in a block splicing area 11 and a beam end welding area 12, the block splicing area 11 is arranged at the rear end of the beam end welding area 12, and the rear end refers to the rear end of the steel box beam body in the pushing direction; the block assembly area 11 is used for assembling and welding the left steel box girder body section and the right steel box girder body section together, and the girder end welding area 12 is used for welding the girder end welding area with the steel box girder body section 6 of the previous section when the girder end welding area is used for pulling and positioning the steel box girder body section 6 of the next section. The hoisting area and the steel box girder semi-finished product storage area are arranged behind the block assembly area 11 in sequence, and the hoisting device is used for hoisting the semi-finished girder body stored in the steel box girder semi-finished product storage area onto the assembly jig frame.

The embodiment provides a specific assembly jig frame structure, assembles the jig frame and includes curve slide 9, sharp slide 1, first stand 7, second stand 3 and concrete expansion basis 2, combines the fig. 3-5 to show, wherein: the two curved slide ways 9 are arranged and extend along the preset curved sliding direction of the steel box girder, namely, the steel box girder body 1 slides along the curved slide ways 9 according to the curved line type design of the steel box girder body 6, so that the design position can be reached. The linear slides 1 are arranged at two sides of each curve slide 9 of the block assembly area 11 at intervals, the steel box girder body sections 6 are guided to be pulled to the designed position, at each side of the curve slide 9, along the sliding direction of the steel box girder body 1, there can be one linear slide 1 or two or more linear slides according to the assembly node number of the girder sections, namely, under the traction of the traction device, the steel box girder body of a single section can be guided to slide along one section or two or more sections of straight lines, finally the steel box girder body of the upper section 6 is reached, as shown in fig. 2, each side of the curve slide 9 is provided with 2 linear slides, the assembly area is also divided into two block assembly areas, one block assembly area can assemble the steel box girder body 6 of one section, therefore, 2 linear slides are arranged at each side of the curve slide 9 according to the requirement, the schematic diagrams of the former block assembly area are shown in fig. 3 and 4, and each side of the curve slide 9 is provided with 1 linear slide; of course, in the transverse position, i.e. in the front-to-rear direction as shown in fig. 2, on one side of each curved runner 9, each section is supported by one straight runner 1, and if the steel box girder body 6 is heavy, it is conceivable to design more straight runners 1. A first upright post 7 is arranged below the curve slideway 9, and the first upright post 7 is used for supporting the curve slideway 9, and the whole is longitudinally arranged, namely, the extending direction of the curve slideway 9; the second upright post 3 is arranged below the linear slideway 1, and the second upright post 3 is used for supporting the linear slideway 1 and is longitudinally arranged as a whole, namely, the extending direction of the linear slideway 1. A concrete enlarged foundation 2 is provided under the first and second uprights 7, 3 to increase the load carrying capacity of the foundation.

For the linear slide way 1 on the same side, it is required to say that the two blocks are separated from each other at the corners of the splicing areas, and the steel box girder body 6 can be overhanging out at the corners, and is directly connected with the next linear slide way 1 to continue to stretch along the other line. The separated parts of the two linear slide ways 1 can be provided with pushing jacks 5 for bearing the steel box girder body 6, and meanwhile, the steel box girder pushing operation can be realized in the follow-up pushing construction.

Further, a cross connection 8 is connected between the first upright 7 and the second upright 3, and between the second upright 3 and the second upright 3, which are adjacent to each other in the lateral direction. Namely, in the front-rear direction shown in fig. 2 and 4, the cross connection 8 penetrates through the whole row of upright post structures, of course, the second upright posts 3 are correspondingly arranged on two sides of the first upright posts 7, basically on the same straight line, the cross connection 8 enables the whole assembly jig to be better in integrity and more stable in connection, the curve slideway 9 and the straight slideway 1 are not easy to deviate or incline, and the general cross connection 8 is connected to the top ends of the first upright posts 7 and the second upright posts 3, so that stable support can be better formed on the curve slideway 9 and the straight slideway 1. The cross connection 8 can be made of I-steel, and the I25I-steel is adopted in the embodiment.

Further, the device also comprises a slideway supporting jack 4 which is arranged at intervals below the linear slideway 1 positioned outside the curve slideway 9; the linear slideway 1 positioned outside the curve slideway 9 bears more force for preventing the steel box girder body 6 from turning over, and is arranged below the linear slideway 1 positioned outside the curve slideway 9; generally, a slide supporting jack 4 is arranged between the two second upright posts 3, and the slide supporting jack 4 flexibly supports the linear slide way 1 upwards, so that the linear slide way 1 can be better prevented from being stressed and sinking. A concrete expansion foundation 2 is also arranged below the slideway supporting jack 4, so that the bearing capacity of the foundation is increased.

The present embodiment provides a more specific structure of the first pillar 7 and the second pillar 3. Further, as shown in fig. 13, the first upright 7 includes a first upright bottom plate, a first upright column 701 and a first upright top plate 703 connected from bottom to top; the first upright post bottom plate is connected with an embedded part in the concrete expansion foundation 2, generally, bolts can be embedded in the concrete expansion foundation 2, the first upright post bottom plate is made of steel plates, bolt holes are formed in the first upright post bottom plate in a penetrating mode, the embedded bolts penetrate through the bolt holes, and then nuts are used for screwing; the first upright post column 701 adopts a steel pipe, the lower end of the steel pipe is welded with the first upright post bottom plate, the upper end of the steel pipe is welded with the first upright post top plate 703, the first upright post top plate 703 is also made of a steel plate, and the steel pipe is attached to the bottom surface of the curve slideway 9; the first stiffening plate 702 is fixedly connected to the connecting position of the first upright bottom plate and/or the first upright top plate 703, the first stiffening plate 702 is made of steel plates and is in a right triangle shape, one side of the right angle is connected with the first upright bottom plate or the first upright top plate 703, the other side of the right angle is connected with the first upright column body 701, and the first stiffening plate 702 reinforces the connecting position, so that the first upright column 7 supports the curve slideway 9 more stably. Similar to the structure of the first upright 7, the second upright 3 comprises a second upright bottom plate, a second upright column body and a second upright top plate which are connected from bottom to top; the second upright post bottom plate is connected with an embedded part in the concrete expansion foundation; and a second stiffening plate is fixedly connected at the connection position of the second upright post body and the second upright post bottom plate and/or the second upright post top plate. Since the structure of the first column 7 is similar to that of the first column 7, it should be noted that, since there are a plurality of linear slides 1, the load bearing requirement of the linear slide 1 is lower than that of the curved slide 9, so that the cross section of the linear slide 1 is narrower, and the corresponding steel pipe used by the second column body is generally smaller in diameter than that of the steel pipe used by the first column body 701, and the second stiffening plate is also arranged at the connection position of the second column body and the second column bottom plate or the second column top plate as required.

The present embodiment also provides a more specific configuration of the curved ramp 9 and the linear ramp 1. As shown in fig. 13, the curved slideway 9 includes a curved slideway i-steel side plate 903, a curved slideway top plate 901 and a diaphragm plate 902, the curved slideway i-steel side plate 903 is provided with two groups of i-steels, namely, the two groups of i-steels are arranged in parallel, the top ends of the two groups of i-steels are connected through the curved slideway top plate 901, the curved slideway top plate 901 is welded on the curved slideway i-steel side plate 903, so that a plane is formed, a slide plate for bearing a steel box girder body section 6 is conveniently placed, the diaphragm plate 902 is connected at a vertical clearance position of the curved slideway i-steel side plate 903 at intervals, the diaphragm plates are arranged along the extending direction of the curved slideway 9, and the bearing capacity of the curved slideway 9 can be enhanced, so that the curved slideway 9 is prevented from deforming in the process of pushing the steel box girder. The straight slide 1 includes the first straight slide that is located the curve slide 9 outside and the second straight slide that is located the curve slide 9 inboard, first straight slide includes first straight slide I-steel track Liang Hedi straight slide roof, first straight slide I-steel track roof is provided with two sets of, closely arrange, transversely link together, first straight slide I-steel track roof adopts two to piece together I-steel, because the first straight slide that is located the outside needs to bear more and prevents the power that steel box girder body section 6 turned on one's side, therefore two piece together I-steel is more firm, fixedly connected with first straight slide roof above the I-steel to form the plane and conveniently place slide combination 14. The second linear slideway comprises a second linear slideway I-shaped steel track beam and a second linear slideway top plate, the second linear slideway I-shaped steel track beam is provided with two groups which are transversely connected together, the second linear slideway top plate is fixedly connected above the second linear slideway I-shaped steel track beam, of course, the second linear slideway can adopt the same structure as the first linear slideway, but the second linear slideway can also only adopt a group of second linear slideway I-shaped steel track beams due to lower bearing requirement.

The following will also describe the slide plate assembly 14 more specifically, the slide plate assembly 14 includes steel backing plate and polytetrafluoroethylene slide, and the steel backing plate sets up in polytetrafluoroethylene slide below, and steel backing plate can guarantee to bear steel box girder body 6 steadily, makes polytetrafluoroethylene slide support steel box girder 7, and polytetrafluoroethylene slide frictional force is low, and slide plate assembly 14 is made to pad on sharp slide 1, can guarantee that steel box girder body festival section 6 realizes the quick travel under the effect of draw gear. Of course, the slide plate combination 14 can also push the steel box girder Liang Tishi, and the universal pushing of the steel box girder body is realized by being padded on the curve slide way 9, so that the curve slide way is realized, and the curve sliding of the steel box girder body is limited without using a slide shoe like a linear steel box girder.

Further, this embodiment provides a specific counter-pulling device, and referring to fig. 14, the counter-pulling device includes two sets of counter-pulling mechanisms, where the two sets are a left half-width and a right half-width of the beam body section 6 of the pulling steel box beam, so as to facilitate the left-right adjustment of the position according to the curved path of the curved steel box beam. Each group of counter-pulling mechanism comprises a steel clamping seat 13, a counter-force frame 16, a horizontal penetrating jack 17 and a supporting seat 19, wherein: referring to fig. 15-17, the steel clamping seat 13 is detachably fixed on the tail bottom plate of the steel box girder body section 6, and an anchor 1302 is fixed, and the anchor 1302 is an anchor capable of fixing the steel stranded wires 15 in the market; the reaction frame 16 is fixed on the outer side of the curve slideway 9 or the linear slideway 1, and comprises a seal head plate 1601 and a reaction frame stiffening plate 1603, wherein the seal head plate 1601 is provided with a seal head plate through hole 1604 in a penetrating way, the reaction frame stiffening plate 1603 is transversely fixed on one side close to the steel clamping seat 13, and the horizontal through jack 17 applies a pulling force on one side far away from the steel clamping seat 13, so that the seal head plate 1601 has a tendency of inclining towards one side of the steel clamping seat 13, and the reaction frame stiffening plate 1603 is transversely fixed on one side close to the steel clamping seat 13, so that the seal head plate 1601 can be protected from inclining or even falling off, the seal head plate 1601 and the reaction frame stiffening plate 1603 are made of steel plates, the fixing between the seal head plate 1601 and the reaction frame stiffening plate 1603 can also be made of welding way, and the reaction frame 16 can be fixed with the curve slideway 9 or the linear slideway 1 through the welding way; the supporting seat 19 is arranged on one side of the reaction frame 16 far away from the steel clamping seat 13, a horizontal penetrating jack 17 is arranged on the upper surface, and the supporting seat 9 is also fixed on the outer side of the curve slideway 9 or the straight slideway 1, similar to the reaction frame 16. When the horizontal punching jack 17 works, the rear end props against the counter-force frame 16, the counter-force frame 16 applies counter-force to prevent the counter-force frame from retreating, the front end can clamp the steel stranded wire 15 to stretch forwards, so that the steel box girder body section 6 is pulled, after one stroke of stretching is completed, the steel stranded wire 15 is clamped by a clamping mechanism, the piston retracts, the next stretching is performed according to the requirement, and the horizontal punching jack 17 adopts the existing product on the market at present, and the detailed description is omitted here.

A slide plate combination 14 is arranged below the assembled steel box girder body section 6; after the steel box girder body section 6 is assembled, the rear end of the steel stranded wire 15 penetrates through the anchor 1302 and is fixed, the steel clamping seat 13 is fixed at the rear end of the bottom plate at the tail part of the steel box girder body section 6, the front end of the steel stranded wire 15 penetrates through the counter-force frame 16 and is installed in the horizontal penetrating jack 17, and the horizontal penetrating jacks 17 positioned at the left side and the right side of the assembled jig frame respectively pull the steel stranded wire 15, so that the steel box girder body section 6 slides to the designed position along the linear slideway 1.

Furthermore, the embodiment provides a specific steel clamping seat 13, where the steel clamping seat 13 includes a clamping seat base plate 1301, a clamping seat clamping plate 1304 and a clamping seat stiffening plate 1303, the clamping seat clamping plate 1304 is provided with two clamping seat clamping plates, and is fixed between the two clamping seat clamping plates 1304 at a lateral interval, so that the steel box girder tail bottom plate 601 can be clamped in a matching manner, that is, the vertical distance between the clamping seat clamping plates 1304 is greater than the thickness of the steel box girder tail bottom plate 601, so that the space between the clamping seat clamping plates 1304 can be inserted into the rear end of the steel box girder tail bottom plate 601, and therefore, when the steel box girder body section 6 is pulled, the rear end of the steel box girder beam body section 6 is applied, in order to better protect the steel box girder tail bottom plate 601, a protection plate 18 is inserted under the steel box girder tail bottom plate 601, and the protection plate 18 is clamped between the two clamping seat clamping plates 1304, and the protection plate 18 can be a steel plate and is propped under the steel box girder tail bottom plate 601, so that the clamping seat clamping plates 1304 below can be reduced to apply force reversely, and the possibility of deforming the steel box girder tail bottom plate 601 is reduced; an anchor 1302 is fixed on the other side of the holder base plate 1301, a holder through hole 1305 for the matched steel strand 15 to penetrate the anchor 1302 is penetrated, and the rear end of the steel strand 15 penetrates the holder through hole 1305 and the anchor 1302 when the steel box girder body section 6 is pulled, and is fixed by the anchor 1302; the base plates 1301 and the clamping plates 1304 are made of steel plates, are generally square, the clamping plates 1304 between the base plates 1301 are generally welded commonly used in engineering construction, and the anchor 1302 is lower than the clamping plates 1304 in the vertical direction so as to conveniently pass through the steel stranded wires 15; one side of the holder stiffening plate 1303 is connected with one side of the holder base 1301, and the other side is connected with the lower holder clamping plate 1304, so as to prevent the lower holder clamping plate 1304 from being inclined, deformed or even falling off due to the stress on one side far away from the holder base 1301 in the process of pulling the steel box girder body section 6. The seat stiffening plate 1303 is also made of steel plates, preferably two seat stiffening plates are arranged and symmetrically distributed on two sides of the seat through hole 1305, and the seat stiffening plate 1303 can be connected and fixed with the seat base plate 1301 and the seat clamping plate 1304 in a welding mode. Further, the holder stiffener 1303 is a right trapezoid with a long top edge and a short bottom edge, the top edge is connected with the holder clamp plate 1304, the length of the stiffener is preferably consistent with that of the holder clamp plate 1304, and the right-angle side is connected with the holder base plate 1301 and preferably extends to the bottom edge of the holder base plate 1301, so that the holder clamp plate 1304 and the holder base plate 1301 can be better protected.

In addition, for better protecting the reaction frame 16, as shown in fig. 18-20, the reaction frame 16 further includes a seal head reinforcing plate 1602 fixedly connected to a side of the seal head plate 1601 far away from the steel clamping seat 13, where the seal head reinforcing plate 1602 contacts with a rear end of the horizontal center penetrating jack 17, so as to better prevent the seal head plate 1601 from being damaged, and the seal head reinforcing plate 1602 is provided with a seal head reinforcing plate through hole, which is communicated with the seal head plate through hole 1604 and can accommodate the steel stranded wires 15 to pass through. Further, the reaction frame stiffening plate 1603 is provided with two reaction frame stiffening plates, which are respectively arranged on the upper side and the lower side of the end socket plate through hole 1604, and are preferably symmetrically arranged, the reaction frame stiffening plate 1603 is a right triangle, one right-angle side is connected with the end socket plate 1601, the right-angle side preferably extends to the outer side of the end socket plate 1601 far away from the linear slide way 1 or the curve slide way 9, the other right-angle side is connected with the outer side of the linear slide way 1 or the curve slide way 9, and the triangular end socket stiffening plate 1602 can enable the connection between the reaction frame 16 and the linear slide way 1 or the curve slide way 9 to be more stable, and can also prevent the end socket plate 1601 from deforming better.

Further, this embodiment also provides a more specific structure of the supporting seat 9, and as shown in fig. 21, the supporting seat 9 includes a bracket 1901 made of two angle steels, a pad 1902 and a baffle 1903, the upper surface of the bracket 1901 is connected with the pad 1902, the front and rear sides of the pad 1902 are fixedly connected with vertically arranged baffles 1903, the pad 1902 can support the horizontal jack 17 in a matching manner, i.e. the width of the pad 1902 between the two baffles 1903 is greater than the width of the horizontal jack 17, can accommodate the horizontal jack 17, and the two baffles 1903 can prevent the horizontal jack 17 from falling from front or rear. The bracket 1901 is welded on the outer side of the linear slideway 1 or the curved slideway 9, and the backing plate 1902 is welded with the bracket 1901 to realize fixation.

Further, the counter pulling mechanism further comprises a protection plate 18, if the protection plate 18 is added, the vertical distance between the two clamping seat clamping plates 104 needs to be slightly larger than the thickness of the steel box girder tail bottom plate 601 and the protection plate 18, so as to fix the steel clamping seat 1 at the rear end of the steel box girder 7.

Further, as shown in fig. 8 to 10, the pushing jack device 5 includes a rectifying pushing jack 502 and an angle adjusting pushing jack 501, and the rectifying jack includes a slide box 502c, a jack slideway 502a, a jacking jack unit, a transverse rectifying unit 502b and a pushing jack unit 502d; one end of the sliding box 502c is connected with a piston rod of the pushing jack unit 502d or the piston rod of the pushing jack unit 502d passes through the sliding box 502c to drive the sliding box 502c to slide back and forth on the jack slide 502 a; the rear end of the cylinder body of the pushing jack unit 502d is connected with the rear end of the slide box 502 c; a jacking jack unit is fixed in the slide box 502 c; the two sides of the sliding box 502c are provided with a transverse deviation rectifying unit 502b, the outer ends of the transverse deviation rectifying units 502b are fixed on the left side wall and the right side wall of the jack slideway 502a, wherein the sliding box 502c can be pushed and reset along with the extension or shortening of a piston pushing the jack unit 502d, the transverse deviation rectifying units 502b are also provided with jacks, the left deviation or the right deviation of the sliding box 502c is realized through the extension or shortening of the jacks in the left lateral deviation rectifying units 502b, and therefore curve sliding adjustment is completed, if the steel box girder body is deviated to the right, the jacks in the left lateral deviation rectifying units 502b are extended, and the jacks in the right lateral deviation rectifying units 502b are retracted, so that the left adjustment of the steel box girder body is realized. A jacking jack unit is fixed in the slide box 502c, and drives a top plate of the slide box 502c to ascend, so that the steel box girder body is jacked, and the steel box girder body is pushed forward by matching with the extension of the jacking jack unit 502 d. The angle adjusting pushing jack 501 is arranged at the front side and the rear side of the deviation correcting jack, an arc-shaped concave groove and a hemispherical body capable of horizontally rotating in the arc-shaped concave groove are arranged in the angle adjusting pushing jack, and a supporting jack is fixed on the hemispherical body; when the steel box girder body is pushed to complete one stroke, the supporting jack in the angle adjusting pushing jack 501 is lifted to support the steel box girder body, and the angle adjusting pushing jack 501 can adapt to deflection of the curved steel box girder body due to the structure similar to a spherical hinge, after the angle adjusting pushing jack 501 supports the steel box girder body, the lifting jack unit is retracted, the pushing jack unit 502d is retracted again, and a new round of pushing stroke is started. The deviation correcting pushing jack 502 and the angle adjusting pushing jack 501 are coordinated to realize the pushing of the steel box girder, when the girder body part of the steel box girder deviates from a preset curve line, the extension and the shortening of the transverse deviation correcting unit 502b are adjusted, so that the sliding box 502c is adjusted in the left-right direction, and the line type sliding adjustment of the girder body part of the steel box girder is realized.

Further, as shown in fig. 11 and 12, the rectifying and pushing jack 502 and the angle adjusting and pushing jack 501 are provided with supporting devices, and the uppermost layer of the supporting devices is a bamboo plywood 21. More specifically, the bearing means comprises a reinforced concrete support structure 19, a support steel plate 20 and a bamboo plywood 21, wherein: when in use, the lower surface of the reinforced concrete supporting structure 19 is directly contacted with the deviation rectifying pushing jack 502; the steel plate 2 is laid on the steel-concrete supporting structure 19; the bamboo plywood 21 is paved on the steel plate 2, the upper surface of the bamboo plywood 21 is directly contacted with the steel box girder body, and the steel box girder body is driven to advance under the action of the pushing jack 4 by utilizing friction force. For the reinforced concrete supporting structure 19, in this embodiment, the reinforced concrete supporting structure 19 includes a plurality of square pipe units that are regularly arranged together, and the square pipe units are made by pouring concrete into the square pipe, and of course, square pipe means square pipe made of steel, and concrete is poured into the square pipe, on the one hand can alleviate the dead weight of the reinforced concrete supporting structure 19, and on the other hand the reinforced concrete supporting structure adopts the mode that a plurality of square pipe units are arranged, is difficult for appearing the phenomenon of whole slippage. More preferably, the reinforced concrete supporting structure 19 is provided with at least 2 layers, each layer is arranged together by square tube units in sequence, the use of supporting steel plates 20 can be reduced by adopting the reinforced concrete supporting structure 19, deformation phenomena possibly occurring due to compression when the steel plates 2 are used can be reduced as much as possible, and the line type of the steel box girder is further ensured.

Further, the front end and/or the rear end of the jack slide 502a are marked with a marking line 502e, that is, the jack slide 502a belongs to a fixed part in the pushing process, the front end or the rear end is not blocked by the sliding slide box 502c, the marking line 502e marks at least the midpoint of the jack slide 502a, more size lines can be marked, the outer wall of the steel box girder segment 6 is provided with a transmitting device capable of transmitting light spots at intervals, when the transmitting device passes over the jack slide 502a, the light spots transmitted by the transmitting device are observed to indicate to the midpoint of the jack slide 502a, if the light spots are indicated to the midpoint of the jack slide 502a or a threshold position near the midpoint, the steel box girder segment 6 is indicated to not deviate, if the light is not indicated to be beyond the threshold position of the marking line of the jack slide 502a, and the corresponding transverse deviation correcting unit 502b is adjusted to be lengthened or shortened according to the light indication to the left side or the rear side of the midpoint of the jack slide 502a, so that the pushing adjustment of the steel box girder segment 6 is realized. The launching device can be provided with a plurality of launching devices, the distance is set according to the pushing stroke of the deviation rectifying and pushing jack 502, constructors can intuitively know the sliding track of the steel box girder body through observing the light spots, and timely carry out sliding linear adjustment, so that the pushing safety of the steel box girder is improved.

Furthermore, in order to better realize automatic control, the embodiment is also provided with a pushing control system; the area in the threshold range of the marking line 502e on the jack slide 502a is marked with one color, the left side or the right side of the threshold range of the marking line 502e is respectively marked with different colors, and the transmitting device is an optical fiber sensor; the pushing control system is respectively connected with the optical fiber sensor, the jacking jack unit, the transverse deviation rectifying unit 502b and the pushing jack unit 502d, when the optical fiber sensor detects that the light spot is projected in the threshold range of the marking line, the transverse deviation rectifying unit 502b is not required to be started for rectifying, and when the optical fiber sensor detects that the light spot is projected on the left side or the right side of the threshold range of the marking line 502e, the transverse deviation rectifying unit 502b is started to extend or shorten for transversely rectifying the pushing of the steel box girder. Of course, more color partitions can be set in the area outside the threshold value range according to the situation, so that the offset distance can be better identified through the optical fiber sensor, the extension or retraction of the transverse deviation correcting unit 502b can be better controlled, and the control intelligence level is improved.

Because the expressway constructed in this embodiment spans another existing expressway 24, the interference to the other existing expressway 24 during pushing needs to be reduced as much as possible, so the temporary buttresses 23 are combined and constructed by using the permanent piers 22 in this embodiment, the bearing capacity of the temporary buttresses 23 is improved, meanwhile, the construction of the temporary buttresses 23 can be quickened, and the interference to the other existing expressway 24 during passing is reduced as much as possible. The embodiment also provides a temporary buttress 23 structure which is convenient to build, and as shown in fig. 24-26, the temporary buttress 23 comprises a steel pipe upright post 2301, a buttress tie bar 2302 and a jack support box girder 2302; two steel pipe columns 2301 are respectively arranged at two sides of the permanent pier 22, the steel pipe columns 2301 are taken as basic brackets, and the arrangement of the permanent pier 22 and the temporary buttress 23 is shown in figures 22-23; concrete expansion foundation 2 is poured under steel pipe column 2301, concrete expansion foundation 2 is poured firstly, connecting pieces are pre-embedded in concrete expansion foundation 2, connection between steel pipe column 2301 and concrete expansion foundation 2 is achieved through the connecting pieces, for example, concrete expansion foundation 2 can be poured together with a bearing platform of permanent pier 22 through screwing, integrity of concrete expansion foundation 2 and bearing platform of temporary supporting pier is improved, and uneven settlement is reduced; the steel pipe column 2301 may be divided into a plurality of sections, and the sections are connected by flanges; the jack support box girder 2203 is supported on the steel pipe upright column 2301, the jack support box girder 2203 is made of steel materials and can be connected with the steel pipe upright column 2301 by bolts, so that the workload of field welding is reduced; the jack supporting box girder 2203 is used for supporting the pushing jack device 5, of course, in order to adjust the deviation correcting pushing jack 502 in the pushing jack device 5 to a proper pushing height, a backing girder can be fixed below the pushing jack device 5, the backing girder is fixed on the jack supporting box girder 2203, and the angle adjusting pushing jack 501 is arranged on the front side and the rear side of the backing girder; to increase the integrity of the entire temporary pier 23, pier ties 2302 are laterally connected between adjacent steel columns 2301.

In addition, according to the bearing requirement on the steel box girder 6 and the size of the ground area, a more stable temporary buttress 23 structure can be further arranged, and as shown in fig. 27-29, the temporary buttress 23 comprises a steel pipe upright 2301, a buttress tie bar 2302, a jack supporting box girder 2302 and a buttress cross beam 2304; four steel pipe columns 2301 are respectively arranged at two sides of the permanent pier 22, and each four steel pipe columns 2301 is used as a local whole of the basic bracket; concrete expansion foundation 2 is poured under steel pipe column 2301, concrete expansion foundation 2 is poured firstly, connecting pieces are pre-embedded in concrete expansion foundation 2, connection between steel pipe column 2301 and concrete expansion foundation 2 is achieved through the connecting pieces, for example, concrete expansion foundation 2 can be poured together with a bearing platform of permanent pier 22 through screwing, integrity of concrete expansion foundation 2 and bearing platform of temporary supporting pier is improved, and uneven settlement is reduced; the steel pipe column 2301 may be divided into a plurality of sections, and the sections are connected by flanges; a buttress cross beam 2304 is connected between the tops of the steel pipe columns 2301 on the same side, the buttress cross beam 2304 is parallel to the direction of the permanent piers 22, a jack supporting box beam is supported on the buttress cross beam 2304, the buttress cross beam 2304 and the jack supporting box beam 2203 are made of steel materials, and the buttress cross beam 2304, the jack supporting box beam 2203 and the buttress cross beam 2304 and the steel pipe columns 2301 can be connected by bolts, so that the workload of field welding is reduced; the jack supporting box girder 2203 is used for supporting the pushing jack device 5, of course, in order to adjust the deviation correcting pushing jack 502 in the pushing jack device 5 to a proper pushing height, a backing girder can be fixed below the pushing jack device 5, the backing girder is fixed on the jack supporting box girder 2203, and the angle adjusting pushing jack 501 is arranged on the front side and the rear side of the backing girder; to increase the integrity of the entire temporary pier 23, pier ties 2302 are laterally connected between adjacent steel columns 2301.

At the dismantling position of the guide beam 10, temporary piers 23 can be arranged between the permanent piers 22 as required, and the temporary piers 23 refer to the temporary piers 23 structure arranged in combination with the permanent piers 22, but the guide beam 10 continuously spans the temporary piers 23 at the dismantling position section by section without depending on the permanent piers, and is dismantled section by section until the guide beam 10 is completely dismantled, and then the beam falling link is completed finally.

Claims

1. The construction method for splicing and pushing the cross-high-speed curve steel box girder is characterized by comprising the following steps of:

S1, dividing a steel box girder into a plurality of steel box girder body sections, wherein each steel box girder body section is divided into a left steel box girder body section and a right steel box girder body section for prefabrication, and the prefabrication is completed and transported to a construction site; constructing an assembly jig frame on the pushing starting point, wherein the assembly jig frame comprises a linear slideway and a curve slideway, temporary piers are arranged on the peripheral side and the top surface of the permanent piers, and pushing jack devices are arranged at the design position of the assembly jig frame and the top surface of the temporary piers;

2. The construction method for splicing and pushing the steel box girder crossing the high-speed curve, which is characterized by comprising the following steps of:

the assembly jig frame is arranged in a block assembly area and a beam end welding area, and the block assembly area is arranged at the rear end of the beam end welding area;

3. The construction method for splicing and pushing the steel box girder crossing the high-speed curve, which is characterized by comprising the following steps of:

And transverse links are connected between the first upright posts and the second upright posts and between the second upright posts and the second upright posts which are adjacent to each other in the transverse direction.

4. The construction method for splicing and pushing the steel box girder crossing the high-speed curve according to claim 2 or 3, which is characterized by comprising the following steps of:

the device also comprises a slideway supporting jack which is arranged below the linear slideway positioned outside the curve slideway at intervals; and a concrete expansion foundation is arranged below the slideway supporting jack.

5. The construction method for splicing and pushing the steel box girder crossing the high-speed curve, which is characterized by comprising the following steps of:

The reverse pulling device comprises two groups of reverse pulling mechanisms, each group of reverse pulling mechanism comprises a steel clamping seat, a reaction frame, a horizontal penetrating jack and a supporting seat, wherein: the steel clamping seat is detachably fixed on the tail bottom plate of the girder body section of the steel box girder and is fixedly provided with an anchor; the reaction frame is fixed on the outer side of the curve slideway or the straight slideway and comprises a seal head plate and a reaction frame stiffening plate, wherein the seal head plate is provided with a seal head plate through hole in a penetrating manner, and one side close to the steel clamping seat is transversely fixed with the reaction frame stiffening plate; the support seat is arranged on one side of the reaction frame, which is far away from the steel clamping seat, and the horizontal center-penetrating jack is arranged on the support seat;

6. The construction method for splicing and pushing the steel box girder crossing the high-speed curve, which is characterized by comprising the following steps of:

The jacking jack device comprises a correction jacking jack and an angle adjustment jacking jack, wherein the correction jacking jack comprises a slide box, a jack slideway, a jacking jack unit, a transverse correction unit and a jacking jack unit; one end of the sliding box is connected with a piston rod of the pushing jack unit or the piston rod of the pushing jack unit passes through the sliding box to drive the sliding box to slide back and forth on a jack slideway; the rear end of the cylinder body of the pushing jack unit is connected with the rear end of the slide box; a jacking jack unit is fixed in the slide box; the two sides of the sliding box are provided with transverse deviation rectifying units, and the outer ends of the transverse deviation rectifying units are fixed on the left side wall and the right side wall of the jack slideway;

7. The construction method for assembling and pushing the steel box girder crossing the high-speed curve, which is characterized by comprising the following steps of:

The support device is arranged on the correcting pushing jack and the angle adjusting pushing jack, and the uppermost layer of the support device is a bamboo plywood.

8. The construction method for assembling and pushing the steel box girder crossing the high-speed curve, which is characterized by comprising the following steps of:

The front end and/or the rear end of the jack slide way are/is marked with a marking line, the marking line at least marks the midpoint of the jack slide way, the outer wall of the steel box girder body section is provided with a transmitting device capable of transmitting light spots at intervals, when the transmitting device passes over the jack slide way, the light spots transmitted by the transmitting device are observed to indicate to the midpoint of the jack slide way, if the light spots indicate to the midpoint of the jack slide way or a threshold position near the midpoint of the jack slide way, the steel box girder body section is indicated to not deviate, if the light spots do not indicate to the position beyond the threshold position of the marking line of the jack slide way, the corresponding transverse deviation correcting unit is adjusted to extend or shorten according to the light indication to the left side or the rear side of the midpoint of the jack slide way.

9. The construction method for assembling and pushing the steel box girder crossing the high-speed curve, which is characterized by comprising the following steps of:

the pushing control system is also arranged;

10. The construction method for splicing and pushing the steel box girder crossing the high-speed curve, which is characterized by comprising the following steps of:

the temporary buttress comprises a steel pipe upright post, a buttress tie rod and a jack supporting box girder; at least two steel pipe upright posts are respectively arranged on two sides of the permanent pier; a concrete expansion foundation is poured under the steel pipe upright post, a jack supporting box girder is supported on the steel pipe upright post, or a buttress crossbeam is connected between the tops of the steel pipe upright posts on the same side, and the jack supporting box girder is supported on the buttress crossbeam; the jack supporting box girder is used for supporting the pushing jack device; and a buttress tie bar is transversely connected between the adjacent steel pipe upright posts.