CN110374018B - Method for reinforcing combined steel large cross beam erected multi-span temporary beam line - Google Patents
Method for reinforcing combined steel large cross beam erected multi-span temporary beam line Download PDFInfo
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- CN110374018B CN110374018B CN201910521278.6A CN201910521278A CN110374018B CN 110374018 B CN110374018 B CN 110374018B CN 201910521278 A CN201910521278 A CN 201910521278A CN 110374018 B CN110374018 B CN 110374018B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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Abstract
The invention discloses a method for reinforcing a multi-span temporary beam line erected by a combined large steel beam, which comprises five steps of erecting a transitional D-shaped construction temporary beam, installing the large steel beam, installing a distribution beam, inversely moving the formal D-shaped construction temporary beam and installing a limiting device. The construction in the whole construction process does not influence the normal driving operation of a business line, and meanwhile, the driving safety of the business line (railway) is enhanced; the two or more lines can be simultaneously reinforced by adopting the large steel beams with different lengths, and when the two or more frame box bridges are jacked in two holes, the multi-span D-shaped construction temporary beam can be erected and the multi-hole frame box bridge is jacked in, so that the time and the labor are saved, and the construction efficiency is at least improved by 50%; and the steel large cross beam, the distribution beam and the limiting device are all in a combined connection mode, can be repeatedly used for splitting and splicing, and are repeatedly used, so that the labor and material cost is greatly reduced.
Description
Technical Field
The invention relates to a method for reinforcing a business line, which is suitable for the jacking construction process of a railway box bridge, in particular to a method for reinforcing a combined steel large crossbeam-erected multi-span temporary beam line.
Background
With the rapid development of railways in China in recent years, a four-way and eight-reach railway network is formed nationwide. Therefore, many projects of overpasses between roads and railways appear, and the overpass under the road is the most common overpass way at present. The most common line strengthening methods in overpass construction are D-shaped construction temporary beams, longitudinal and transverse beam lifting methods and the like. The underpass railway overpass is generally of a two-hole or multi-hole structure, during construction, a line is reinforced and then jacked into one hole frame box section, and then a beam is moved and inverted to jack into the other hole, so that the underpass railway overpass has the defects of long construction period, incapability of jacking into the multi-hole frame box section at one time, small application range, easiness in being limited by geological conditions and the like. Therefore, in order to meet the requirements of construction of business lines, it is necessary to develop a line strengthening method which can adapt to various environments.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for reinforcing a combined steel large crossbeam erected multi-span temporary beam line, which has the advantages that the construction in the whole construction process does not influence the normal driving operation of a business line, and the driving safety of the business line (railway) is enhanced; the two or more lines can be simultaneously reinforced by adopting the large steel beams with different lengths, and when the two or more frame box bridges are jacked in two holes, the multi-span D-shaped construction temporary beam can be erected and the multi-hole frame box bridge is jacked in, so that the time and the labor are saved, and the construction efficiency is at least improved by 50%; and big crossbeam of steel, distributive girder, stop device are combination formula connected mode, but reuse separation and concatenation many times, recycle, greatly reduced artifical and materials cost, improved advantages such as efficiency of construction.
In order to achieve the purpose, the invention provides the following technical scheme:
a combined type steel large crossbeam erection multi-span temporary beam line reinforcing method comprises five steps of erection of a transition D-shaped construction temporary beam 1, installation of a steel large crossbeam 2, installation of a distribution beam 3, reverse movement erection of a formal D-shaped construction temporary beam 4 and installation of a limiting device 5:
the first step is as follows: the erection of the transitional D-shaped construction temporary beam 1 specifically comprises the following steps:
the transitional D-shaped construction temporary beam 1 is divided into a front-end D-shaped temporary beam 11, a middle D-shaped temporary beam 12 and a rear-end D-shaped temporary beam 13 according to different installation positions;
pouring temporary buttresses 14 at two ends of the position where the transitional D-shaped construction temporary beam 1 is pre-installed, and erecting a front-end D-shaped temporary beam 11, a middle D-shaped temporary beam 12 and a rear-end D-shaped temporary beam 13 on the temporary buttresses 14;
the second step is that: the installation of the steel large cross beam 2 specifically comprises the following steps:
1) after the erection of the transitional D-shaped construction temporary beam 1 is finished, constructing and building a bored pile buttress 21 at two ends of the position where the steel large cross beam 2 is pre-installed, and then constructing and building a bearing platform 22 on the bored pile buttress 21;
2) respectively excavating roadbed soil at the middle part below the front end D-shaped temporary girder 11, the middle D-shaped temporary girder 12 and the rear end D-shaped temporary girder 13 along the direction vertical to the track to form a steel large crossbeam mounting groove 23, then penetrating the steel large crossbeam 2 into the excavated steel large crossbeam mounting groove 23, and placing two ends of the steel large crossbeam 2 on a bearing platform 22;
the third step: the installation of the distribution beam 3 specifically comprises the following steps:
after two ends of the steel large cross beam 2 are placed on the bearing platform 22, the distributing beams 3 are respectively arranged above the longitudinal beam end points of the steel large cross beam pre-bearing transition D-shaped construction temporary beam 1;
the fourth step: the inverted erection of the formal D-shaped construction temporary beam 4 specifically comprises the following steps:
1) moving the front end D-shaped temporary girder 11 from the temporary buttress 14 to the front of the business line track by using a crane, so that one end of the front end D-shaped temporary girder 11 is lapped on a road surface on one side, and the other end is lapped on the distribution girder 3 positioned below the front end D-shaped temporary girder 11;
2) moving the middle D-shaped temporary beams 12 from the temporary buttress 14 to the front end D-shaped temporary beams 11 by using a crane, so that one end of each middle D-shaped temporary beam 12 is lapped on the distribution beam 3 positioned below the front end D-shaped temporary beam 11, and the other end of each middle D-shaped temporary beam 12 is lapped on the distribution beam 3 positioned below the middle D-shaped temporary beam 12;
3) moving the rear end D-shaped temporary beams 13 from the temporary buttresses 14 to the rear direction of the business line track by using a crane, so that one ends of the rear end D-shaped temporary beams 13 are lapped on the distribution beams 3 positioned below the rear end D-shaped temporary beams 13, and the other ends of the rear end D-shaped temporary beams are lapped on the road surface on the other side;
4) preparing a section of a filling D-shaped temporary beam 16, overlapping one end of the filling D-shaped temporary beam 16 on the distribution beam 3 below the middle D-shaped temporary beam 12 by using a crane, and overlapping the other end of the filling D-shaped temporary beam 16 on the distribution beam 3 below the rear D-shaped temporary beam 13; completing the system conversion from the transitional D-shaped construction temporary beam 1 to the formal D-shaped construction temporary beam 4;
the fifth step: the installation of the limiting device 5 specifically comprises the following steps:
the limiting device 5 comprises at least two channel steels 51, at least two steel plates 52, at least two angle steels 53, L-shaped brackets 54 and bolts 55, wherein the steel plates 52 are fixedly connected above the channel steels 51, the steel plates 52 are connected with the angle steels 53 through the bolts 55, the included angles between the steel plates 52 and the angle steels 53 are 30-60 degrees, bolt holes are formed in two ends of each channel steel 51, and the channel steels 51 are connected with the L-shaped brackets 54 through the bolts 55;
the channel steel 51 is arranged perpendicular to the steel crossbeam 2 and aligned with the side ribs of the steel crossbeam 2, the L-shaped brackets 54 are connected with the steel crossbeam 2 by using bolts 55 at the upper parts of the side ribs at two sides of the steel crossbeam 2, one end of an angle steel 53 is connected to the front end D-shaped temporary beam 11 or the middle D-shaped temporary beam 12 or the rear end D-shaped temporary beam 13 or a longitudinal beam added into the D-shaped temporary beam 16 by a bolt 53, and the other end is connected to the steel plate 52 by a bolt 53.
Further, the distribution beam 3 comprises a spliced steel rail 31, a reinforced steel rail 32, a screw 33 and a nut 34, screw holes are formed in two ends of the reinforced steel rail 32, the length of the reinforced steel rail 32 is greater than that of the spliced steel rail 31, the spliced steel rail 31 is formed by splicing a plurality of steel rails 311 in a buckling rail mode, the reinforced steel rail 32 is spliced on two sides of the spliced steel rail 31 in the buckling rail mode, and the screw 33 is locked by the nut 34 after passing through the screw holes in the reinforced steel rails 32 on two sides of the spliced steel rail 31.
Further, each distribution beam 3 comprises 1 spliced rail 31 assembled by 12-22 rails 311, 2 reinforcing rails 32, 4 screws 33 and 16 nuts 34.
Further, the transition D-shaped temporary beam 1 is a 24m D-shaped temporary beam.
Further, the steel crossbeam 2 comprises 3-10 single beams, the single beams are longitudinal beams of 20m D-type temporary beams, and each single beam is placed on the bearing platform 22 and is in close contact with each other.
Further, the included angle between the steel plate 52 and the angle iron 53 is 45 °.
Further, when the heights of the front end D-shaped temporary beam 11 and the rear end D-shaped temporary beam 13 are smaller than the height of the middle D-shaped temporary beam 12, a height difference adjusting buttress 15 is arranged below the front end D-shaped temporary beam 11 and the rear end D-shaped temporary beam 13, so that the highest points of the front end D-shaped temporary beam 11, the middle D-shaped temporary beam 12 and the rear end D-shaped temporary beam 13 are kept on the same plane, the top end of the height difference adjusting buttress 15 is in contact connection with the front end D-shaped temporary beam 11 or the rear end D-shaped temporary beam 13, and the bottom end of the height difference adjusting buttress 15 is in contact connection with the distribution beam 3.
Further, when the stopper 5 is mounted, the channel steel 51 is connected to the L-shaped bracket 54 by bolts, the L-shaped bracket is connected to the side rib of the steel girder 3 by bolts 55, and a plurality of single girders are bound together to form a combined steel girder.
After the construction of the business line is completed, the reinforcing system can be dismantled and reused, and the dismantling method comprises the following steps: firstly, removing the limiting device, then moving the formal D-shaped temporary girder reversely into a transition D-shaped temporary girder, unbinding the combined steel large crossbeam, then drawing out the steel large crossbeam, removing the transition D-shaped temporary girder, finishing the construction of the overpass passing through the railway downwards, and recovering the existing business line.
Compared with the prior art, the invention has the following beneficial effects:
1. the method of the invention firstly erects the transitional D-shaped construction temporary beam, then sequentially installs the steel large beam and the distribution beam, then inversely moves and erects the formal D-shaped construction temporary beam, and finally installs the limiting device to form a firm reinforcement system, the construction in the whole construction process does not influence the normal driving operation of the business line, and simultaneously enhances the driving safety of the business line (railway).
2. The invention can simultaneously reinforce two or more lines by adopting large steel beams with different lengths, can erect multi-span D-shaped construction temporary beams when the frame box bridge with two or more holes is jacked, simultaneously jacks the multi-hole frame box bridge, does not need to carry out transitional D-shaped construction temporary beams and formal D-shaped construction temporary beams moving and reversing beams for jacking in a grading way, saves time and labor and improves the construction efficiency by at least 50 percent.
3. According to the invention, the distribution beam is additionally arranged between the D-shaped construction temporary beam and the steel large beam, so that the common stress of the steel large beam is ensured; when a train passes through the structure system, loads are transmitted to the D-shaped construction temporary beam through the steel rail lines, the distribution beam disperses the transmitted loads through the buckling effect between the steel rails and the reinforcing steel rails and uniformly transmits the loads to each single-piece distribution beam of the large steel beam, so that the stress of each single-piece beam is consistent, the phenomenon that a certain single-piece beam is not stressed but the stress of the certain single-piece beam is concentrated is avoided, and the load capacity of the whole reinforcing system is enhanced.
4. The limiting device is in a combined mode and can be used for multiple times, the steel large cross beam, the distribution beam and the D-shaped construction temporary beam are connected into an integral reinforcing system through the limiting device, the integrity and the stability of the integral reinforcing system are enhanced, the driving safety of a business line (railway) is powerfully guaranteed, and the driving safety risk brought to the business line (railway) by construction is reduced.
5. The invention is also provided with a height difference adjusting buttress, and the height difference adjusting buttress can greatly save the material cost on the premise of ensuring the integrity and the stability of the reinforcement system.
6. The invention can adapt to various geological conditions, can simultaneously complete the simultaneous reinforcement of two or more lines, does not need to carry out manual hole digging construction between the two lines, reduces the safety risk of personnel and train operation, has long distance between a drilling support pile and a business line, reduces the potential safety hazard of construction, and simultaneously provides convenience for construction. The invention can safely and reliably overhead the existing line, and achieves the aim of bridge jacking construction or provides an overhead working surface for other offline constructions.
7. The large steel beam, the distribution beam and the limiting device are all in a combined connection mode, and can be repeatedly used for disassembly and splicing and repeated use; when the reinforcement system is dismantled, the limiting device is firstly dismantled, then the formal D-shaped temporary girder is moved backwards to be the transitional D-shaped temporary girder, the combined steel large cross beam is unbound, then the steel large cross beam is drawn out, then the transitional D-shaped temporary girder is dismantled, the construction of the overpass passing through the railway is completed, the existing business line is recovered, the use is very simple and convenient, the labor and material cost is greatly reduced, and the construction efficiency is improved.
Drawings
FIG. 1 is a schematic view of a transitional D-shaped construction temporary beam;
FIG. 2 is a schematic view of a large beam of mounting steel;
FIG. 3 is a schematic structural view of a steel crossbeam;
FIG. 4 is a schematic plan view of the installation of a distributor beam;
FIG. 5 is a schematic view of a distribution beam mounting perspective;
FIG. 6 is a schematic view of a mounting structure of a height difference adjusting buttress;
FIG. 7 is a schematic perspective view of a distributor beam;
FIG. 8 is a schematic view showing a process of erecting a formal D-shaped construction temporary beam in a reverse direction;
FIG. 9 is a schematic diagram of the completion of the reverse-movement erection of the formal D-shaped construction temporary beam;
FIG. 10 is a schematic diagram of the architecture after installation of the position limiting device
FIG. 11 is a perspective view of the position limiter;
FIG. 12 is an enlarged view of the structure at A in FIG. 10;
fig. 13 is an enlarged schematic view of B in fig. 10.
In the figure: the construction method comprises the following steps of a transitional D-shaped construction temporary beam 1, a front end D-shaped temporary beam 11, a middle D-shaped temporary beam 12, a rear end D-shaped temporary beam 13, a temporary buttress 14, a height difference adjusting buttress 15, a supplement D-shaped temporary beam 16, a steel large beam 2, a bored pile buttress 21, a bearing platform 22, a groove 23, a distribution beam 3, a splicing steel rail 31, a reinforcing steel rail 32, a screw 33, a nut 34, a steel rail 311, a formal D-shaped temporary beam 4, a limiting device 5, a channel steel 51, a steel plate 52, angle steel 53, an L-shaped bracket 54 and a bolt 55.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
A combined steel crossbeam erects the multi-span temporary beam circuit and strengthens the method, as shown in fig. 1-13, include the erection of the temporary beam 1 of transition D-type construction, the installation of the large beam 2 of steel, the installation of the distribution beam 3, the inverted movement erection of the formal D-type construction temporary beam 4 and installation of the stop device 5 five steps;
the first step is as follows: as shown in fig. 1, the erection of the transitional D-shaped construction temporary beam 1 specifically comprises the following steps:
the transitional D-shaped construction temporary beam 1 is divided into a front-end D-shaped temporary beam 11, a middle D-shaped temporary beam 12 and a rear-end D-shaped temporary beam 13 according to different installation positions;
pouring temporary buttresses 14 at two ends of the position where the transitional D-shaped construction temporary beam 1 is pre-installed, and erecting a front-end D-shaped temporary beam 11, a middle D-shaped temporary beam 12 and a rear-end D-shaped temporary beam 13 on the temporary buttresses 14;
the second step is that: as shown in fig. 2 and 3, the installation of the steel crossbeam 2 specifically includes the following steps:
1) after the erection of the transitional D-shaped construction temporary beam 1 is finished, constructing and building a bored pile buttress 21 at two ends of the position where the steel large cross beam 2 is pre-installed, and then constructing and building a bearing platform 22 on the bored pile buttress 21;
2) respectively excavating roadbed soil at the middle part below the front end D-shaped temporary girder 11, the middle D-shaped temporary girder 12 and the rear end D-shaped temporary girder 13 along the direction vertical to the track to form a steel large crossbeam mounting groove 23, then penetrating the steel large crossbeam 2 into the excavated steel large crossbeam mounting groove 23, and placing two ends of the steel large crossbeam 2 on a bearing platform 22;
the third step: as shown in fig. 4 and 5, the installation of the distribution beam 3 specifically includes the following steps:
after two ends of the steel large cross beam 2 are placed on the bearing platform 22, the distributing beams 3 are respectively arranged above the longitudinal beam end points of the steel large cross beam pre-bearing transition D-shaped construction temporary beam 1;
according to the invention, the distribution beam is additionally arranged between the D-shaped construction temporary beam and the steel large beam, so that the common stress of the steel large beam is ensured; when a train passes through the structure system, loads are transmitted to the D-shaped construction temporary beam through the steel rail lines, the distribution beam disperses the transmitted loads through the buckling effect between the steel rails and the reinforcing steel rails and uniformly transmits the loads to each single-piece distribution beam of the large steel beam, so that the stress of each single-piece beam is consistent, the phenomenon that a certain single-piece beam is not stressed but the stress of the certain single-piece beam is concentrated is avoided, and the load capacity of the whole reinforcing system is enhanced.
The fourth step: as shown in fig. 8 and 9, the reverse movement erection of the formal D-shaped construction temporary beam 4 specifically includes the following steps:
1) moving the front end D-shaped temporary girder 11 from the temporary buttress 14 to the front of the business line track by using a crane, so that one end of the front end D-shaped temporary girder 11 is lapped on a road surface on one side, and the other end is lapped on the distribution girder 3 positioned below the front end D-shaped temporary girder 11;
2) moving the middle D-shaped temporary beams 12 from the temporary buttress 14 to the front end D-shaped temporary beams 11 by using a crane, so that one end of each middle D-shaped temporary beam 12 is lapped on the distribution beam 3 positioned below the front end D-shaped temporary beam 11, and the other end of each middle D-shaped temporary beam 12 is lapped on the distribution beam 3 positioned below the middle D-shaped temporary beam 12;
3) moving the rear end D-shaped temporary beams 13 from the temporary buttresses 14 to the rear direction of the business line track by using a crane, so that one ends of the rear end D-shaped temporary beams 13 are lapped on the distribution beams 3 positioned below the rear end D-shaped temporary beams 13, and the other ends of the rear end D-shaped temporary beams are lapped on the road surface on the other side;
4) preparing a section of a filling D-shaped temporary beam 16, overlapping one end of the filling D-shaped temporary beam 16 on the distribution beam 3 below the middle D-shaped temporary beam 12 by using a crane, and overlapping the other end of the filling D-shaped temporary beam 16 on the distribution beam 3 below the rear D-shaped temporary beam 13; completing the system conversion from the transitional D-shaped construction temporary beam 1 to the formal D-shaped construction temporary beam 4;
the fifth step: as shown in fig. 10, 11, 12 and 13, the installation of the limiting device 5 specifically includes the following steps:
the limiting device 5 comprises at least two channel steels 51, at least two steel plates 52, at least two angle steels 53, L-shaped brackets 54 and bolts 55, wherein the steel plates 52 are fixedly connected above the channel steels 51, the steel plates 52 are connected with the angle steels 53 through the bolts 55, the included angles between the steel plates 52 and the angle steels 53 are 30-60 degrees, bolt holes are formed in two ends of each channel steel 51, and the channel steels 51 are connected with the L-shaped brackets 54 through the bolts 55;
the quantity of channel steel 51, steel plate 52, angle steel 53 can be according to the load increase of top business line doubly, and the corresponding increase of quantity of L type bracket 54, bolt 55 simultaneously also.
The channel steel 51 is arranged perpendicular to the steel crossbeam 2 and aligned with the side ribs of the steel crossbeam 2, the L-shaped bracket 54 is connected with the steel crossbeam 2 by using bolts 55 at the upper parts of the side ribs at two sides of the steel crossbeam 2, one end of an angle steel 53 is connected to the front end D-shaped temporary beam 11 or the middle D-shaped temporary beam 12 or the rear end D-shaped temporary beam 13 or a longitudinal beam supplemented into the D-shaped temporary beam 16 by the bolts 55, and the other end of the angle steel 53 is connected to the steel plate 52 by the bolts 55, and during actual construction, the connection of the angle steel 53 and the D-shaped temporary beam can be specifically in the following form: on the distributor beam 3 which is positioned below the front end D-shaped temporary beam 11 and below the middle D-shaped temporary beam 12, one end of one angle steel 53 is connected to the longitudinal beam of the middle D-shaped temporary beam 12 through a bolt 55, the other end of the angle steel is connected to the steel plate 52 through a bolt 53, one end of the other angle steel 53 is connected to the longitudinal beam of the front end D-shaped temporary beam 11 through a bolt 55, and the other end of the other angle steel 53 is connected to the steel plate 52 through a bolt 55; on the distributor beam 3 which is positioned below the middle D-shaped temporary beam 12 and below the complementary D-shaped temporary beam 16, one end of an angle steel 53 is connected to the longitudinal beam of the complementary D-shaped temporary beam 16 through a bolt 55, the other end of the angle steel is connected to the steel plate 52 through a bolt 55, one end of the other angle steel 53 is connected to the longitudinal beam of the middle D-shaped temporary beam 12 through a bolt 55, and the other end of the other angle steel 53 is connected to the steel plate 52 through a bolt 55; on the distributor beam 3 positioned below the longitudinal beam of the filling D-shaped temporary beam 16 and below the rear end D-shaped temporary beam 14, one end of one angle steel 53 is connected to the longitudinal beam of the filling D-shaped temporary beam 16 through a bolt 55, the other end of the angle steel is connected to the steel plate 52 through a bolt 55, one end of the other angle steel 53 is connected to the longitudinal beam of the rear end D-shaped temporary beam 14 through a bolt 55, and the other end of the other angle steel 53 is connected to the steel plate 52 through a bolt 55; the limiting device is in a combined mode and can be used for multiple times, the steel large cross beam, the distribution beam and the D-shaped construction temporary beam are connected into an integral reinforcing system through the limiting device, the integrity and the stability of the integral reinforcing system are enhanced, the driving safety of a business line (railway) is powerfully guaranteed, and the driving safety risk brought to the business line (railway) by construction is reduced.
Preferably, the distribution beam 3 includes a spliced rail 31, a reinforcing rail 32, a screw 33, and a nut 34, screw holes are provided at both ends of the reinforcing rail 32, the length of the reinforcing rail 32 is greater than that of the spliced rail 31, the spliced rail 31 is formed by splicing a plurality of rails 311 in a fastening rail manner, the reinforcing rail 32 is spliced at both sides of the spliced rail 31 in a fastening rail manner, and the screw 33 is locked by the nut 34 after passing through the screw holes on the reinforcing rail 32 located at both sides of the spliced rail 31.
Preferably, each distribution beam 3 comprises 1 spliced rail 31 assembled from 12-22 rails 311, 2 reinforcing rails 32, 4 screws 33 and 16 nuts 34.
Preferably, the transition D-shaped temporary beam 1 is a 24m D-shaped temporary beam.
Preferably, the steel crossbeam 2 comprises 3-10 single beams, the single beams are longitudinal beams of 20m D-type temporary beams, and each single beam is placed on the bearing platform 22 and is in close contact with each other.
Preferably, the angle between the steel plate 52 and the angle iron 53 is 45 °.
Preferably, as shown in fig. 6 and 10, when the heights of the front end D-shaped toilet beam 11 and the rear end D-shaped toilet beam 13 are smaller than the height of the middle D-shaped toilet beam 12, a height difference adjusting buttress 15 is arranged below the front end D-shaped toilet beam 11 and the rear end D-shaped toilet beam 13, so that the highest points of the front end D-shaped toilet beam 11, the middle D-shaped toilet beam 12 and the rear end D-shaped toilet beam 13 are kept on a plane, the top end of the height difference adjusting buttress 15 is in contact connection with the front end D-shaped toilet beam 11 or the rear end D-shaped toilet beam 13, and the bottom end of the height difference adjusting buttress 15 is in contact connection with the distribution beam 3.
Preferably, when the limiting device 5 is installed, the channel steel 51 is connected with the L-shaped bracket 54 by using bolts, the L-shaped bracket is connected with the side rib of the steel crossbeam 3 by using bolts 55, and a plurality of single beams are bound into a whole to form the combined steel crossbeam.
The large steel beam, the distribution beam and the limiting device are all in a combined connection mode, and can be repeatedly used for disassembly and splicing and repeated use; after the construction of the business line is finished, when the reinforcement system is dismantled, the limiting device is dismantled, the formal D-shaped temporary girder is moved backwards to be the transitional D-shaped temporary girder, the combined steel large cross beam is unbound, the steel large cross beam is pulled out, the transitional D-shaped temporary girder is dismantled, the construction of the overpass passing through the railway is finished, the existing business line is recovered, the use is very simple and convenient, the labor and material cost is greatly reduced, and the construction efficiency is improved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a modular big crossbeam of steel erects multispan just roof beam circuit reinforcing method, includes five steps of the erection of transition D type construction just roof beam (1), the installation of big crossbeam of steel (2), the installation of distribution roof beam (3), the installation of the back-shift of formal D type construction just roof beam (4) erects and stop device (5), its characterized in that:
the first step is as follows: the erection of the transition D-shaped construction temporary beam (1) specifically comprises the following steps:
the transitional D-shaped construction temporary beam (1) is divided into a front-end D-shaped temporary beam (11), a middle D-shaped temporary beam (12) and a rear-end D-shaped temporary beam (13) according to different installation positions;
pouring temporary buttresses (14) at two ends of the position where the transitional D-shaped construction temporary beam (1) is pre-installed, and erecting a front-end D-shaped temporary beam (11), a middle D-shaped temporary beam (12) and a rear-end D-shaped temporary beam (13) on the temporary buttresses (14);
the second step is that: the installation of the steel large cross beam (2) specifically comprises the following steps:
1) after the construction of the transitional D-shaped construction temporary beam (1) is finished, constructing and building bored pile buttresses (21) at two ends of the position where the steel large cross beam (2) is pre-installed, and then constructing and building a bearing platform (22) on the bored pile buttresses (21);
2) excavating roadbed soil bodies at the middle parts below a front end D-shaped temporary beam (11), a middle D-shaped temporary beam (12) and a rear end D-shaped temporary beam (13) along the direction vertical to a track to form a steel large cross beam mounting groove (23), penetrating a steel large cross beam (2) into the excavated steel large cross beam mounting groove (23), and placing two ends of the steel large cross beam (2) on a bearing platform (22);
the third step: the distribution beam (3) mounting method specifically comprises the following steps:
after two ends of the steel large cross beam (2) are placed on the bearing platform (22), respectively installing a distribution beam (3) above the end point of the longitudinal beam of the steel large cross beam pre-bearing transition D-shaped construction temporary beam (1);
the fourth step: the inverted erection of the formal D-shaped construction temporary beam (4) specifically comprises the following steps:
1) moving the front end D-shaped temporary beam (11) from the temporary buttress (14) to the front of the business line track by using a crane, so that one end of the front end D-shaped temporary beam (11) is lapped on a road surface on one side, and the other end is lapped on a distribution beam (3) positioned below the front end D-shaped temporary beam (11);
2) moving the middle D-shaped temporary beam (12) from the temporary buttress (14) to the direction of the front end D-shaped temporary beam (11) by using a crane, so that one end of the middle D-shaped temporary beam (12) is lapped on the distribution beam (3) positioned below the front end D-shaped temporary beam (11), and the other end is lapped on the distribution beam (3) positioned below the middle D-shaped temporary beam (12);
3) a crane is used for moving the rear end D-shaped temporary beam (13) from the temporary buttress (14) to the rear direction of the business line track, so that one end of the rear end D-shaped temporary beam (13) is lapped on the distribution beam (3) positioned below the rear end D-shaped temporary beam (13), and the other end of the rear end D-shaped temporary beam is lapped on the road surface on the other side;
4) preparing a section of a D-shaped compensating beam (16), overlapping one end of the D-shaped compensating beam (16) on the distribution beam (3) below the middle D-shaped beam (12) by using a crane, and overlapping the other end of the D-shaped compensating beam on the distribution beam (3) below the rear D-shaped beam (13); completing system conversion from the transitional D-shaped construction temporary beam (1) to the formal D-shaped construction temporary beam (4);
the fifth step: the installation of the limiting device (5) specifically comprises the following steps:
the limiting device (5) comprises at least two channel steels (51), at least two steel plates (52), at least two angle steels (53), L-shaped brackets (54) and bolts (55), the steel plates (52) are fixedly connected above the channel steels (51), the steel plates (52) are connected with the angle steels (53) through the bolts (55), the included angle between each steel plate (52) and each angle steel (53) is 30-60 degrees, bolt holes are formed in the two ends of each channel steel (51), and the channel steels (51) are connected with the L-shaped brackets (54) through the bolts (55);
arranging channel steel (51) and a steel crossbeam (2) vertically and aligning with side ribs of the steel crossbeam (2), connecting an L-shaped bracket (54) and the steel crossbeam (2) by using bolts (55) at the upper parts of the side ribs at two sides of the steel crossbeam (2), connecting one end of an angle steel (53) to a front end D-shaped temporary beam (11) or a middle D-shaped temporary beam (12) or a rear end D-shaped temporary beam (13) or a longitudinal beam of a D-shaped temporary beam (16) by using the bolts (55), and connecting the other end of the angle steel (53) to a steel plate (52) by using the bolts (55),
the connection of the angle iron 53 and the D-shaped temporary beam can be embodied in the following form: on the distributor beam 3 which is positioned below the front end D-shaped temporary beam 11 and below the middle D-shaped temporary beam 12, one end of one angle steel 53 is connected to the longitudinal beam of the middle D-shaped temporary beam 12 through a bolt 55, the other end of the angle steel is connected to the steel plate 52 through a bolt 53, one end of the other angle steel 53 is connected to the longitudinal beam of the front end D-shaped temporary beam 11 through a bolt 55, and the other end of the other angle steel 53 is connected to the steel plate 52 through a bolt 55; on the distributor beam 3 which is positioned below the middle D-shaped temporary beam 12 and below the complementary D-shaped temporary beam 16, one end of an angle steel 53 is connected to the longitudinal beam of the complementary D-shaped temporary beam 16 through a bolt 55, the other end of the angle steel is connected to the steel plate 52 through a bolt 55, one end of the other angle steel 53 is connected to the longitudinal beam of the middle D-shaped temporary beam 12 through a bolt 55, and the other end of the other angle steel 53 is connected to the steel plate 52 through a bolt 55; on the distributor beam 3 positioned below the longitudinal beam of the filling D-shaped temporary beam 16 and below the rear end D-shaped temporary beam 14, one end of one angle steel 53 is connected to the longitudinal beam of the filling D-shaped temporary beam 16 through a bolt 55, the other end of the angle steel is connected to the steel plate 52 through a bolt 55, one end of the other angle steel 53 is connected to the longitudinal beam of the rear end D-shaped temporary beam 14 through a bolt 55, and the other end of the other angle steel 53 is connected to the steel plate 52 through a bolt 55; the limiting device is in a combined mode and can be used for multiple times, and the steel large cross beam, the distribution beam and the D-shaped construction temporary beam are connected into an integral reinforcing system through the limiting device.
2. The method for reinforcing the line of the combined steel large cross beam erected multi-span temporary beam according to claim 1, wherein:
distribution beam (3) are including concatenation rail (31), enhancement rail (32), screw rod (33), nut (34), it is equipped with the screw to strengthen rail (32) both ends, the length of strengthening rail (32) is greater than the length of concatenation rail (31), concatenation rail (31) are formed through detaining the rail form concatenation by a plurality of rail (311), strengthen rail (32) through detaining the both sides of rail form concatenation at concatenation rail (31), screw rod (33) pass behind the screw hole that is located the enhancement rail (32) of concatenation rail (31) both sides, lock with nut (34).
3. The method for reinforcing the line of the combined steel large cross beam erected multi-span temporary beam according to claim 2, wherein: each distribution beam (3) comprises 1 spliced steel rail (31) assembled by 12-22 steel rails (311), 2 reinforced steel rails (32), 4 screw rods (33) and 16 nuts (34).
4. The method for reinforcing the line of the combined steel large cross beam erected multi-span temporary beam according to claim 1, wherein: the transition D-shaped temporary beam (1) is a 24m D-shaped temporary beam.
5. The method for reinforcing the line of the combined steel large cross beam erected multi-span temporary beam according to claim 1, wherein: the steel crossbeam (2) comprises 3-10 single beams, the single beams are longitudinal beams of 20m D-type temporary beams, and each single beam is placed on the bearing platform (22) and is in close contact with the bearing platform.
6. The method for reinforcing the line of the combined steel large cross beam erected multi-span temporary beam according to claim 1, wherein: the included angle between the steel plate (52) and the angle steel (53) is 45 degrees.
7. The method for reinforcing the line of the combined steel large cross beam erected multi-span temporary beam according to claim 1, wherein: when the height of the front end D-shaped temporary beam (11) and the rear end D-shaped temporary beam (13) is smaller than that of the middle D-shaped temporary beam (12), height difference adjusting buttresses (15) are arranged below the front end D-shaped temporary beam (11) and the rear end D-shaped temporary beam (13), the highest points of the front end D-shaped temporary beam (11), the middle D-shaped temporary beam (12) and the rear end D-shaped temporary beam (13) are kept on the same plane, the top end of each height difference adjusting buttress (15) is in contact connection with the front end D-shaped temporary beam (11) or the rear end D-shaped temporary beam (13), and the bottom end of each height difference adjusting buttress (15) is in contact connection with the distribution beam (3).
8. The method for reinforcing the line of the combined steel large cross beam erected multi-span temporary beam according to claim 1, wherein: when the limiting device (5) is installed, the channel steel (51) is connected with the L-shaped bracket (54) through bolts, the L-shaped bracket is connected with the side rib of the steel large beam (2) through bolts (55), and the plurality of single beams are bound into a whole to form the combined steel large beam.
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| CN110965482B (en) * | 2019-12-03 | 2024-07-12 | 中交特种工程有限公司 | Beam bridge system reinforcing device and method for suspender arch bridge |
| CN114032784B (en) * | 2021-12-13 | 2024-02-20 | 山东济铁工程建设集团有限公司 | Transverse lifting light convenient beam structure for jacking railway frame bridge and construction method |
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