Temporary pipe support stable assembly type truss structure bridge and installation method thereof

Abstract

The invention relates to the technical field of bridges, in particular to a temporary pipe support stable assembly type truss structure bridge and a mounting method thereof. Comprising a bridge floor which is transversely arranged on a plurality of bridge pier supports; the trusses are arranged on the two sides of the bridge floor in the width direction, each truss is formed by fixing a plurality of steel truss sections, and each truss comprises a truss upper chord and a truss lower chord; and the bridge portal frames are longitudinally arranged on the two sides of the bridge floor in the length direction and fixed to the two trusses. The truss is formed by fixing a plurality of steel truss sections, and in the process that the steel truss sections are assembled one by one on a construction site, accurate positioning and stable assembly of the Golomery steel truss sections are achieved in a temporary pipe support stable assembly mode; the problems that transportation is inconvenient and construction flexibility is low due to the fact that the whole truss is directly installed and assembled are solved, follow-up multiple times of matching, adjusting and installing are not needed, the construction and installing period is shortened, input cost is reduced, construction safety is improved, and potential safety hazards are avoided.

Description

Technical Field

[0001] This invention relates to the field of bridge technology, and in particular to a temporary tube bracing stabilized prefabricated truss structure bridge and its installation method. Background Technology

[0002] A bridge generally refers to a structure built across rivers, lakes, or seas to allow vehicles and pedestrians to pass smoothly. To adapt to the modern, rapidly developing transportation industry, the term "bridge" has also been extended to refer to a building that crosses mountain streams, adverse geological conditions, or meets other transportation needs to make travel more convenient.

[0003] In existing technologies, when constructing bridges over rivers, the entire bridge span is typically assembled in a factory and then lifted and towed to the bridge site using a floating crane for overall assembly. However, this method presents challenges such as inconvenient transportation, low construction flexibility, and the risk of positioning deviations due to the bridge's own weight or external forces during installation. This necessitates repeated matching and installation, resulting in high construction time and labor costs. Furthermore, the installation process may even lead to overturning, posing significant safety hazards. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an installation method for a temporary pipe bracing stabilized prefabricated truss structure that has low investment cost, high safety and precise installation and construction positioning.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is: a temporary tube-braced stabilized prefabricated truss structure bridge, the innovation of which lies in: including The bridge deck is laterally mounted on multiple pier supports; The bridge deck has a truss on each side of its width. The truss is made up of multiple steel truss segments and includes an upper chord and a lower chord. The bridge gantry is longitudinally arranged on both sides of the length of the bridge deck and fixed to the two trusses.

[0006] Furthermore, it also includes truss wind bracing fixedly installed on the top sides of the two trusses. The truss wind bracing includes K-shaped wind bracing and X-shaped wind bracing, with the X-shaped wind bracing located in the middle of the two trusses and the K-shaped wind bracing located on both sides of the X-shaped wind bracing.

[0007] Furthermore, the upper chord, lower chord, and web members of the truss are all provided with wind-supported web plates.

[0008] Furthermore, the plurality of steel truss segments include a first steel truss segment, a second steel truss segment, a third steel truss segment, a fourth steel truss segment, a fifth steel truss segment, a sixth steel truss segment, a seventh steel truss segment, an eighth steel truss segment, a ninth steel truss segment, a tenth steel truss segment, and an eleventh steel truss segment arranged sequentially, and the truss is a symmetrical structure; Furthermore, the first, second, third, fourth, and fifth steel truss segments are symmetrical to the seventh, eighth, ninth, tenth, and eleventh steel truss segments with respect to the sixth steel truss segment. The sixth steel truss segment includes a sixth upper chord segment, and the lower center of the sixth upper chord segment is provided with a sixth upper connecting protrusion. The other steel truss segments all include an upper chord segment, a lower chord segment, and at least two truss web members. Each truss web member is connected to the upper chord segment through an upper connecting protrusion, and each truss web member is connected to the lower chord segment through a lower connecting protrusion. The sixth upper chord segment and the upper chord segments of the other ten steel truss segments are fixed to form the upper chord of the truss, and the lower chord segments of the other ten steel truss segments are fixed to form the lower chord of the truss, and the web members of the truss are distributed in a sawtooth pattern between the upper chord and the lower chord of the truss. Furthermore, the bridge deck is also equipped with two rows of anti-collision guardrails arranged in opposite directions. Each row of anti-collision guardrails includes multiple anti-collision guardrails and a first crossbeam, a second crossbeam, and a third crossbeam arranged sequentially from bottom to top. The first crossbeam, the second crossbeam, and the third crossbeam are located on opposite sides of the anti-collision guardrails. The first crossbeam, the second crossbeam, and the third crossbeam are all tubular. The wall thickness of the first crossbeam and the second crossbeam are the same, and the wall thickness of the first crossbeam is greater than that of the third crossbeam. The axes of the first crossbeam, the second crossbeam, and the third crossbeam are on the same vertical line. The crash barrier includes a base plate, a post, and multiple brackets disposed on one side of the post, and the post is fixedly installed on the base plate. The multiple brackets have similar structures and are arranged from bottom to top as a first bracket, a second bracket, and a third bracket. The third bracket includes a C-shaped outer frame, a C-shaped inner frame, and bolts and nuts for fastening. The C-shaped outer frame is fixedly installed on the column, and the opening of the C-shaped outer frame faces outward. Both ends of the opening side of the C-shaped inner frame are tangent to and fixed to the third crossbeam. The C-shaped inner frame is fitted inside the C-shaped outer frame through the opening of the C-shaped outer frame and is fastened to the C-shaped outer frame by the bolts and nuts for fastening.

[0009] Furthermore, a C-shaped rubber pad is provided between the C-shaped outer frame and the C-shaped inner frame.

[0010] Furthermore, a method for temporarily bracing and stabilizing prefabricated truss structure bridges specifically includes the following steps: S1. Erect a temporary trestle bridge for construction, construct the substructure pile foundation, abutment and pier supports, and multiple steel truss segments of the parallel operation truss. S2. Drive multiple steel pipe piles between the pier supports, install the pre-assembly platform for the side span steel beams, and simultaneously install temporary piers for jacking construction, as well as pier top slides and limiting devices; then install the first steel truss segment on the platform, and install the corresponding jacking steel guide beams on the temporary piers; S3. Push the first steel truss segment and hoist the second steel truss segment into place on the pre-assembled steel beam. Then weld it to the previous steel truss segment. During the pushing process, the horizontal and vertical displacement of the main beam and guide beam and the top elevation of the slide should be monitored to ensure the safety of the pushing construction. S4. After all the steel truss segments are welded and formed into a complete truss, push the truss into place, remove the guide beam, lift the main beam at the temporary support point of the main beam, remove the slide rail, and install permanent supports. Simultaneously lower the beams at each pier. S5. Dismantle temporary construction piers and side span assembly platforms, install bridge deck crash barriers, and construct bridge deck paving and public structures. S6. Dismantle the temporary construction trestle, conduct a load test on the completed bridge, and prepare for opening to traffic.

[0011] The advantages of this invention are: The truss in this patent is made up of multiple steel truss segments. During the assembly process on the construction site, temporary pipe supports are used to stabilize the assembly, which achieves precise positioning and stable assembly of the steel truss segments. This avoids the inconvenience of transportation and the low flexibility of construction caused by directly installing the pre-assembled truss. It also eliminates the need for multiple matching and adjustment installations, shortens the construction and installation cycle, reduces investment costs, improves construction safety, and avoids safety hazards. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention.

[0013] Figure 2 Installation process of the present invention Figure 1 .

[0014] Figure 3 Installation process of the present invention Figure 2 .

[0015] Figure 4 This is a front view of the truss structure of the present invention.

[0016] Figure 5 This is a top view of the overall structure of the present invention.

[0017] Figure 6 This is a partial structural schematic diagram of the present invention.

[0018] Figure 7 This is a schematic cross-sectional view of the anti-collision guardrail structure of the present invention. Detailed Implementation

[0019] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0020] like Figure 1-7 The bridge shown is a temporary pipe-braced stabilized prefabricated truss structure bridge, which is set on a river channel. The river channel has a first riverbank road 4 and a second riverbank road 5 on both sides of its width, and includes a bridge deck 1, a truss 2, and a bridge portal 3.

[0021] The bridge deck 1 is horizontally mounted on two pier supports 6, with one pier support 6 installed on the side of the first riverbank road 4 away from the second riverbank road 5, and the other pier support 6 installed on the side of the second riverbank road 5 close to the first riverbank road 4.

[0022] A truss 2 is provided on both sides of the width of the bridge deck 1. The truss 2 is made up of multiple steel truss segments and includes an upper chord 202 and a lower chord 203.

[0023] The bridge gantry 3 is longitudinally positioned on both sides of the length of the bridge deck 1 and is fixed to the two trusses 2.

[0024] It also includes truss wind bracing that is fixedly installed on the top side of the two trusses 2. The truss wind bracing includes K-shaped wind bracing 10 and X-shaped wind bracing 11. The X-shaped wind bracing 11 is installed at the middle position of the two trusses 2, and the K-shaped wind bracing 10 is located on both sides of the X-shaped wind bracing 11.

[0025] Multiple steel truss segments include a first steel truss segment 21, a second steel truss segment 22, a third steel truss segment 23, a fourth steel truss segment 24, a fifth steel truss segment 25, a sixth steel truss segment 26, a seventh steel truss segment 27, an eighth steel truss segment 28, a ninth steel truss segment, a tenth steel truss segment 29, and an eleventh steel truss segment, and the truss 2 is a symmetrical structure.

[0026] Furthermore, the first steel truss segment 21, the second steel truss segment 22, the third steel truss segment 23, the fourth steel truss segment 24, and the fifth steel truss segment 25 are symmetrical with respect to the sixth steel truss segment 26, as are the seventh steel truss segment 27, the eighth steel truss segment 28, the ninth steel truss segment, the tenth steel truss segment 29, and the eleventh steel truss segment.

[0027] The sixth steel truss segment 26 includes a sixth upper chord segment, and the lower center of the sixth upper chord segment is also provided with a sixth upper connecting protrusion. The other steel truss segments all include an upper chord segment, a lower chord segment, and at least two truss web members 201. Each truss web member 201 is connected to the upper chord segment through an upper connecting protrusion, and each truss web member 201 is connected to the lower chord segment through a lower connecting protrusion.

[0028] The sixth upper chord segment and the upper chord segments of the other ten steel truss segments are fixed to form the upper chord 202 of the truss, and the lower chord segments of the other ten steel truss segments are fixed to form the lower chord 203 of the truss, and the web members 201 of the truss are distributed in a sawtooth pattern between the upper chord 202 and the lower chord 203 of the truss.

[0029] The upper chord 202, lower chord 203, and web members 201 of the truss are all equipped with wind-supported web plates.

[0030] A longitudinal connecting rod 12 is fixed at the middle position between the two trusses 2, and inclined fixing heads 112 are fixed on both sides of the longitudinal connecting rod 12 on the truss 2. Four inclined connecting heads 113 are symmetrically provided in the middle of the longitudinal connecting rod 12.

[0031] The X-shaped wind brace 11 includes four diagonal braces 111, which are symmetrically fixed between the longitudinal connecting rod 12 and the two trusses 2. Each diagonal brace 111 is fixed to the inclined fixing head 112 and the inclined connecting head 113 on both sides respectively.

[0032] Two rows of anti-collision guardrail groups 13 are also installed on the bridge deck 1. Each row of anti-collision guardrail group 13 includes multiple anti-collision guardrails 131 and a first crossbeam 132, a second crossbeam, and a third crossbeam 133 arranged sequentially from bottom to top. The first crossbeam 132, the second crossbeam, and the third crossbeam 133 are located on the opposite side of the anti-collision guardrails 131. The first crossbeam 132, the second crossbeam, and the third crossbeam 133 are all tubular. The wall thickness of the first crossbeam 132 and the second crossbeam is equal. The wall thickness of the first crossbeam 132 is greater than that of the third crossbeam 133. The axes of the first crossbeam 132, the second crossbeam, and the third crossbeam 133 are on the same vertical line.

[0033] The crash barrier 131 includes a base plate 1311, a post 1312, and multiple brackets 1313 disposed on one side of the post 1312. The post 1312 is fixedly installed on the base plate 1311 by a flange 1314 and connecting bolts 1315.

[0034] The multiple brackets 1313 have similar structures and are arranged from bottom to top as a first bracket, a second bracket, and a third bracket. The third bracket includes a C-shaped outer frame 13131, a C-shaped inner frame 13132, and bolt and nut fasteners 13133. The C-shaped outer frame 13131 is fixedly installed on the column 1312, and the opening of the C-shaped outer frame 13131 faces outward. Both ends of the opening side of the C-shaped inner frame 13132 are cut outward and fixed to the third crossbeam 133. The C-shaped inner frame 13132 is fitted inside the C-shaped outer frame 13131 through the opening of the C-shaped outer frame 13131, and the C-shaped inner frame 13132 and the C-shaped outer frame 13131 are fastened together by bolt and nut fasteners 13133.

[0035] A C-shaped rubber pad 13134 is also provided between the C-shaped outer frame 13131 and the C-shaped inner frame 13132.

[0036] A method for installing a prefabricated truss structure bridge with temporary pipe bracing, specifically including the following steps: S1. Erect a temporary trestle bridge 9 for construction, construct the substructure pile foundation, abutment and pier supports 6, and multiple steel truss segments of the parallel operation truss 2.

[0037] S2. Drive multiple steel pipe piles between the pier supports 6, install the pre-assembly platform 7 for the side span steel beams, and simultaneously install temporary jacking piers, as well as pier top slides and limiting devices. Then, install the first steel truss segment 21 on the platform 7, and correspondingly install the jacking steel guide beam 8 on the temporary piers.

[0038] S3. Push the first steel truss segment 21 and hoist the second steel truss segment 22 into place on the pre-assembled steel beam. Then weld it to the previous steel truss segment. During the pushing process, the horizontal and vertical displacement of the main beam and guide beam, as well as the top elevation of the slide, should be monitored to ensure the safety of the pushing construction.

[0039] S4. After all the steel truss segments are welded and formed into a complete truss 2, push the truss 2 into place, remove the guide beam, lift the main beam at the temporary support point of the main beam, remove the slide rail, and install permanent supports. Simultaneously lower the beams of each pier.

[0040] S5. Remove the temporary construction piers and side span assembly platform 7, install the bridge deck 1 anti-collision guardrail 131, and construct the bridge deck 1 paving and public structures.

[0041] S6. Dismantle the temporary construction trestle bridge 9, conduct a load test on the completed bridge, and prepare for opening to traffic.

[0042] The truss 2 in this patent is composed of multiple steel truss segments. During the assembly process on the construction site, temporary pipe supports are used to stabilize the assembly, which achieves precise positioning and stable assembly of the steel truss segments. This avoids the inconvenience of transportation and the low flexibility of construction caused by directly installing the pre-assembled truss 2 as a whole. It also eliminates the need for multiple subsequent matching and adjustment installations, shortens the construction and installation cycle, reduces investment costs, improves construction safety, and avoids safety hazards.

[0043] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create similar embodiments without departing from the scope of the present invention. Any simple modifications, similar changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A temporary pipe brace stabilized fabricated truss plate structure bridge, characterized by: The bridge deck is horizontally arranged on a plurality of pier supports; The bridge deck is provided with a truss on both sides of the width of the bridge deck, the truss is fixed by a plurality of steel truss segments, and the truss comprises a truss top chord and a truss bottom chord; The bridge portal is longitudinally arranged on both sides of the length of the bridge deck and is fixed with the two trusses. Further comprising a truss wind brace fixedly installed on the top side of the two trusses, the truss wind brace comprises a K-shaped wind brace and an X-shaped wind brace, and the X-shaped wind brace is located in the middle of the two trusses, and the K-shaped wind brace is located on both sides of the X-shaped wind brace.

2. The temporary pipe support assembly truss bridge according to claim 1, wherein: The truss top chord, the truss bottom chord and the truss web inside the truss web are provided with a wind brace web.

3. The temporary pipe support assembly truss bridge according to claim 1, wherein: The plurality of steel truss segments comprises a first steel truss segment, a second steel truss segment, a third steel truss segment, a fourth steel truss segment, a fifth steel truss segment, a sixth steel truss segment, a seventh steel truss segment, an eighth steel truss segment, a ninth steel truss segment, a tenth steel truss segment and an eleventh steel truss segment arranged in sequence, and the truss is a symmetrical structure.

4. The temporary pipe support assembly of claim 1, wherein: The first steel truss segment, the second steel truss segment, the third steel truss segment, the fourth steel truss segment and the fifth steel truss segment are symmetrical with the seventh steel truss segment, the eighth steel truss segment, the ninth steel truss segment, the tenth steel truss segment and the eleventh steel truss segment about the sixth steel truss segment. The sixth steel truss segment comprises a sixth top chord segment, and the low side center of the sixth top chord segment is further provided with a sixth upper butt protrusion, and the other steel truss segments comprise a top chord segment, a bottom chord segment and at least two truss webs, and each truss web is connected with the top chord segment through an upper butt protrusion, and each truss web is connected with the bottom chord segment through a lower butt protrusion. The sixth top chord segment and the top chord segments of the other ten steel truss segments form the truss top chord, the bottom chord segments of the other ten steel truss segments form the truss bottom chord, and the truss webs are distributed in a zigzag shape between the truss top chord and the truss bottom chord. The bridge deck is further provided with two rows of crash barrier groups arranged opposite to each other, each row of crash barrier group comprises a plurality of crash barriers and a first cross beam, a second cross beam and a third cross beam arranged in sequence from bottom to top, and the first cross beam, the second cross beam and the third cross beam are located on the opposite sides of the crash barriers, and the first cross beam, the second cross beam and the third cross beam are tubular, the wall thickness of the first cross beam and the second cross beam is the same, the wall thickness of the first cross beam is greater than that of the third cross beam, and the center axes of the first cross beam, the second cross beam and the third cross beam are on the same vertical line.

5. The temporary pipe support assembly truss bridge according to claim 1, wherein: The crash barrier comprises a base plate, a stand and a plurality of brackets arranged on one side of the stand, and the stand is fixedly installed on the base plate. ​ The plurality of bracket structures are similar, and are sequentially the first bracket, the second bracket and the third bracket from bottom to top, the third bracket comprises a C-shaped outer frame, a C-shaped inner frame and a bolt-nut fastener, the C-shaped outer frame is fixedly installed on the stand column, and the opening of the C-shaped outer frame is outwardly arranged, the two ends of the opening side of the C-shaped inner frame are both externally tangent to and fixed with the third cross beam, and the C-shaped inner frame is sleeved in the C-shaped outer frame through the opening of the C-shaped outer frame, and the C-shaped inner frame and the C-shaped outer frame are fastened and connected through the bolt-nut fastener.

6. A temporary pipe stay stabilized assembly type girder bridge according to any one of claims 5, characterized in that: The C-shaped outer frame and the C-shaped inner frame are further provided with a C-shaped rubber pad.

7. The installation method for a temporary tube-braced stabilized prefabricated truss structure bridge according to any one of claims 1 to 6, characterized in that: Specifically comprising the following steps: S1, erecting a construction temporary trestle, constructing a pile foundation, a pile cap and a pier support of a lower structure, and parallelly working a plurality of steel truss segments of a truss; S2, inserting and driving a plurality of steel pipe piles between the pier supports, installing a side span steel beam pre-piling platform, simultaneously installing a temporary pushing construction pier, and installing a pier top slide, a limiting device; then installing a first steel truss segment on the platform, and correspondingly installing a pushing steel guide beam on the temporary pier; S3, pushing the first steel truss segment, and hoisting a second steel truss segment on the steel beam pre-piling platform to be in place, and then welding and connecting with the previous steel truss segment; S4, when all the steel truss segments are welded to form a complete truss, pushing the truss to be in place, removing the guide beam, removing the slide, and placing a permanent support, each pier and simultaneously lowering the beam; S5, removing the construction temporary pier and the side span piling platform, installing a bridge deck anti-collision guardrail, constructing a bridge deck pavement and a public structure; S6, removing the construction temporary trestle, performing a load test of the completed bridge, and preparing for traffic operation.

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