CN113463496B - Self-balancing detachable truss bridge structure - Google Patents
Self-balancing detachable truss bridge structure Download PDFInfo
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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
- E01D6/00—Truss-type bridges
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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
- E01D15/00—Movable or portable bridges; Floating bridges
- E01D15/12—Portable or sectional bridges
- E01D15/133—Portable or sectional bridges built-up from readily separable standardised sections or elements, e.g. Bailey bridges
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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
- E01D2101/00—Material constitution of bridges
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Abstract
The invention discloses a self-balancing detachable truss bridge structure, which belongs to the technical field of traffic transportation and comprises a plurality of groups of supports, a plurality of truss units, a bridge floor and a plurality of groups of inhaul cable assemblies. The integral type and size of the invention tend to be unified and standardized, and the invention can carry out industrialized prefabrication production, thus greatly shortening the construction period to a certain extent; the structure module is single, and can be split into separate frameworks, so that the requirement of quick construction and disassembly is met, and the splicing speed is high; the modular design is adopted, so that the number of the modules can be increased and reduced as required, and free span is realized; the stress characteristics of a truss structure and a self-anchored suspension cable structure are combined to form a self-balancing system, a bracket and large machinery are not needed, the engineering quality is easy to control, the occupied field is small, and the influence of seasons is avoided; meanwhile, the equipment is large in storage, suitable for manual assembly and erection, diversified in adaptive span and convenient to transport by general vehicles, and has the advantages of convenience in erection and high withdrawing speed.
Description
Technical Field
The invention relates to the technical field of transportation, in particular to a self-balancing detachable truss bridge structure.
Background
The bridge is generally a structure which is erected on rivers, lakes and seas and allows vehicles, pedestrians and the like to smoothly pass through. In order to adapt to the modern high-speed developed traffic industry, bridges are also extended to be constructed to span mountain stream, unfavorable geology or meet other traffic needs, so that the buildings are convenient to pass. The bridge generally comprises an upper structure, a lower structure, a support and an auxiliary structure, wherein the upper structure is also called a bridge span structure and is a main structure for spanning obstacles; the lower structure comprises a bridge abutment, a bridge pier and a foundation; the support is a force transmission device arranged at the supporting positions of the bridge span structure and the bridge pier or the bridge abutment; the auxiliary structures refer to bridge end butt straps, tapered revetments, diversion works and the like.
When a disaster occurs, how to enable rescue workers and materials to arrive at a disaster-stricken area in time is a problem which needs to be solved urgently, meanwhile, the problem that military needs and materials cannot be supplied to fighters in time due to inconvenient traffic exists in wartime, domestic and foreign emergency bridges are developing towards light weight, large span, modularization, intellectualization and the like, the span of the existing temporary bridge in China is small at present, more temporary piers and large hoisting equipment need to be arranged, the construction period is long, and the economical efficiency is poor. Therefore, a self-balancing detachable truss bridge structure is provided.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: how solve span that current temporary bridge exists less, need set up more interim pier and large-scale hoisting equipment, construction cycle length, economic nature subalternation problem, provide a self-balancing detachable truss bridge structure, this structural span strong adaptability, concatenation speed are fast, construction cycle is short.
The invention solves the technical problems through the following technical scheme, and the bridge comprises a plurality of groups of supports, a plurality of truss units, a bridge deck and a plurality of groups of guy cable assemblies, wherein the truss units are sequentially detachably connected, the number of the supports is the same as that of the guy cable assemblies, the plurality of groups of supports are symmetrically arranged on two truss units on the outermost side, the bridge deck comprises a plurality of steel plates paved at the bottom of each truss unit, one end of each guy cable assembly is connected with the upper end of the truss unit on the outermost side, and the other end of each guy cable assembly is arranged along the supports and is connected with the lower end of the truss unit on the outermost side.
Furthermore, the truss unit comprises a plurality of steel columns, a plurality of steel columns and four cross web members, the steel columns form a square frame, the steel columns are respectively arranged at four corners of the square frame, and the four cross web members are respectively arranged around the square frame.
Furthermore, the channel steel of two adjacent truss units positioned at the outer side is detachably connected.
Furthermore, C-shaped steel is arranged on two channel steels on any side of the two middle truss units, the C-shaped steel and the channel steel on the side are integrally formed, and the channel steel on the other side corresponding to the side is detachably connected with the C-shaped steel.
Furthermore, every group the support all includes to one side draw support, bottom straight-pull support, extension rod, the extension rod is outwards extended by the outside channel-section steel lower extreme of outside truss unit, go up to one side draw the one end of support and the outside channel-section steel upper end of outside truss unit rotate to be connected, the other end with the extension rod outer end rotates to be connected, the one end of bottom straight-pull support rotates with the bottom of outside truss unit to be connected, the other end with the extension rod outer end rotates to be connected.
Furthermore, the upper cable-stayed support comprises a triple pipe, two rotating parts and three straight pipes, wherein the triple pipe comprises three connecting pipes which are connected together, and the three connecting pipes are respectively and rotatably connected with the upper end of the outer side channel steel of the outermost side truss unit, the inner end of the extension rod and the outer end of the extension rod through the three straight pipes; the bottom straight pull support comprises a triple pipe, two rotating parts and three straight pipes, wherein the triple pipe is respectively connected with the lower end of the outermost side truss unit in a rotating mode, the lower end of the outer side channel steel of the outermost side truss unit and the outer end of the extension rod in a rotating mode through the three straight pipes.
Furthermore, the rotation portion comprises a groove arranged on the channel steel and jacks arranged on the straight pipe, through holes matched with the jacks are arranged on the groove in a penetrating mode, and the groove is hinged to the straight pipe through a plug connector penetrating through the through holes and the jacks.
Furthermore, the inhaul cable assembly is a steel strand, the steel strand sequentially penetrates through the two triple pipes, and two ends of the steel strand are respectively connected with the upper end and the lower end of the outermost side truss unit.
Compared with the prior art, the invention has the following advantages: the self-balancing detachable truss bridge structure has the advantages that the integral type and size tend to be unified and standardized, industrial prefabrication production can be carried out, and the construction period is greatly shortened to a certain extent; the structure module is single, and can be split into independent frameworks, so that the requirement of quick construction and disassembly is met, and the splicing speed is high; the modular design is adopted, so that the number of the modules can be increased and reduced as required, and free span is realized; the stress characteristics of the truss structure and the self-anchored suspension cable structure are combined to form a self-balancing system, a support and large machinery are not needed, the engineering quality is easy to control, the occupied field is small, and the self-balancing system is not influenced by seasons; meanwhile, the equipment is large in storage, suitable for manual assembly and erection, diversified in adaptive span and convenient for transportation of general vehicles, has the advantages of convenience in erection and high withdrawing speed, and is worthy of popularization and use.
Drawings
FIG. 1 is a schematic view of an overall structure of a bridge according to a second embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a truss unit according to a second embodiment of the present invention;
fig. 3 is a schematic structural view of channel steel, cross web members and steel columns in a truss unit according to a second embodiment of the present invention;
FIG. 4 is a schematic structural view of a bridge deck according to a second embodiment of the present invention;
FIG. 5 is a schematic structural view of a bridge deck steel plate according to a second embodiment of the present invention;
FIG. 6 is a schematic view of the position of the cable assembly according to the second embodiment of the present invention;
FIG. 7 is a schematic drawing showing the tensile strength of the steel strands in the second embodiment of the present invention;
FIG. 8 is a schematic view of the second embodiment of the present invention showing the self-weight of the bridge;
FIG. 9 is a schematic diagram of the balance between tension and self-weight in the second embodiment of the present invention;
FIG. 10 is a schematic structural view of a bracket according to a second embodiment of the present invention;
FIG. 11a is a schematic structural diagram of a triplet in a stent according to a second embodiment of the present invention;
FIG. 11b is a schematic structural view of a rotating part in the bracket according to the second embodiment of the present invention;
FIG. 12a is a schematic view of a first type of detachable connection between truss units in a second embodiment of the invention;
FIG. 12b is a schematic view of a second type of detachable connection between the truss units in a second embodiment of the invention;
fig. 13 is a schematic diagram of the MIDAS model in the second embodiment of the present invention.
Detailed Description
The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.
Example one
The embodiment provides a technical scheme: the utility model provides a truss bridge structures can be dismantled to self-balancing, includes multiunit support, a plurality of truss unit, bridge floor, multiunit cable subassembly, and is a plurality of the connection can be dismantled in proper order to the truss unit, the support with the quantity of cable subassembly is the same, the multiunit the support symmetry sets up two in the outside on the truss unit, the bridge floor is including laying each the polylith steel sheet of truss unit bottom, the one end of cable subassembly is connected with the upper end of the truss unit in the outside, the other end along the support sets up and is connected with the lower extreme of the truss unit in the outside.
In this embodiment, the truss unit includes a plurality of channel steels, a plurality of steel columns, and four intersecting web members, and a plurality of the steel columns form a square frame, the channel steels are respectively disposed at four corners of the square frame, and the four intersecting web members are respectively disposed around the square frame.
In this embodiment, the channel steel of two adjacent truss units located at the outer side can be detachably connected.
In this embodiment, be located two in the middle be provided with C shaped steel on any side channel-section steel in the truss unit, C shaped steel and this side channel-section steel integrated into one piece, the opposite side channel-section steel that corresponds with this side with C shaped steel can dismantle the connection.
In this embodiment, every group the support all includes to one side draw support, bottom czochralski support, extension rod, the extension rod is outwards extended by the outside channel-section steel lower extreme of outside truss unit, go up to draw the one end of support and the outside channel-section steel upper end of outside truss unit to one side and rotate and be connected, the other end with the extension rod outer end rotates and is connected, the one end of bottom czochralski support rotates with the bottom of outside truss unit and is connected, the other end with the extension rod outer end rotates and is connected.
In this embodiment, the upper cable-stayed support comprises a triple pipe, two rotating parts and three straight pipes, wherein the triple pipe comprises three connecting pipes which are connected together, and the three connecting pipes are respectively and rotatably connected with the upper end of an outer side channel steel of the outermost side truss unit, the inner end of the extension rod and the outer end of the extension rod through the three straight pipes; the bottom straight pull support comprises a triple pipe, two rotating parts and three straight pipes, wherein the triple pipe is respectively connected with the lower end of the outermost side truss unit in a rotating mode, the lower end of the outer side channel steel of the outermost side truss unit and the outer end of the extension rod in a rotating mode through the three straight pipes.
In this embodiment, the portion of rotating is including setting up recess on the channel-section steel, setting are in jack on the straight tube, run through on the recess be provided with jack assorted through hole, the recess with the straight tube is through the plug connector realization that passes through hole and jack and is articulated.
In this embodiment, the cable assembly is a steel strand, the steel strand sequentially passes through two of the triple pipes, and two ends of the steel strand are respectively connected with the upper end and the lower end of the outermost side truss unit.
Example two
This embodiment provides a truss bridge structures can be dismantled to self-balancing, and concrete content is as follows:
1. basic properties of the bridge:
(1) bridge span and bridge width
A unit: the steel bridge is designed with 6 truss units, and the lengths of the truss units are 5m, 4.5m, 4m, 4.5m and 5m respectively;
the total length of the full bridge is 40m, the length of the steel bridge is 30m, and the bridge piers at two ends are 5m respectively;
the full width of the bridge deck is 7m, the bridge deck is divided into two lanes, and each lane is 3.5m wide.
(2) Bridge main body structure
The main structure of the bridge comprises a plurality of assembled truss units 1, four groups of brackets 3, a bridge floor 2 and four groups of inhaul cable assemblies. The overall structure of the bridge is shown in figure 1.
(3) Bridge material design
Q420 steel is adopted in each unit, and the specific physical properties of the steel are as follows:
TABLE 1 physical Property Table
2. Basic frame of bridge
(1) Fig. 2 is a schematic structural diagram of the fabricated truss unit. The main body comprises two parts of channel steel 11 and a steel column 13, cross web members 12 are used on four sides to support the truss structure, the cross web members 12 are arranged on four surfaces of the upper surface, the lower surface and the two sides of the truss structure, and the structural schematic diagrams of the channel steel 11, the steel column 13 and the cross web members 12 are shown in figure 3.
The cross web members 12 are of two types, the first being bottom cross web members provided on the bottom side of the truss structure, top cross web members provided on the top side of the truss structure, and the second being side cross web members provided on both side surfaces of the truss structure.
It should be noted that, in one fabricated truss unit, the number of the channel steel 11 is four, and the front and rear ends of the frame formed by the steel columns 13 are symmetrically arranged two by two and are used for being connected with the channel steel 11 or the bracket 3 in the adjacent fabricated truss unit.
(2) As shown in fig. 4, is a partial structural schematic diagram of the bridge deck. 19, 17 and 15 steel plates are respectively paved on the bridge surface in the frame according to the size of the frame, and the structure of the steel plates is shown in figure 5.
In this embodiment, a steel plate of 7.5m × 0.05m as shown in fig. 5 is used for the inner deck of the fabricated truss.
(3) As shown in fig. 6, the dark line on the brackets at both ends indicates the guy cable assembly of the bridge, using high-strength steel strands with a diameter of 80 mm. One end of the inhaul cable assembly is connected with the upper end of the outermost side truss unit, and the other end of the inhaul cable assembly is arranged along the support 3 and is connected with the lower end of the outermost side truss unit.
The structural innovation of the bridge is that the bridge can achieve a self-balancing state. In the inhaul cable assembly, a high-strength steel strand with the diameter of 80mm is adopted. The specific connection is shown by the arrow part in fig. 7. The arrangement of the inhaul cable assembly enables the high-strength steel strand pre-installed in the support at two sides to form a pulling force from top to bottom along the rod piece from the upper chord to the lower chord of the truss; meanwhile, due to the dead weight of the bridge, as shown by an arrow in fig. 8, the dead weight stressed part of the bridge is shown, so that the upper part of the bridge is pressed, the lower part of the bridge is pulled, and the tension generated by the high-strength steel strand in the bridge rod and the gravity generated by the bridge form a balanced state, as shown in fig. 9.
(4) The joint of the truss unit and the bracket, the protruding end of the outer side channel steel 11 of the outermost truss unit 1 is hollow, and the channel steel 11 is fixedly hinged with the straight pipe 33 by using bolts and nuts (namely, a rotating part 32); the three straight tubes 33 are connected by high strength steel strands using the structure shown in fig. node structure 2, as shown in fig. 10.
Each group of supports 3 comprises an upper cable-stayed support, a bottom straight-pull support and extension rods 34, the upper cable-stayed support comprises a triple pipe 31, two rotating parts 32, three straight pipes 33, and two extension rods 34 outwards extend from the lower end of the outer side channel steel 11 of the outermost side truss unit 1, the triple pipe 31 comprises three connecting pipes which are connected together, and the three connecting pipes are respectively in rotating connection with the upper end of the outer side channel steel 11 of the outermost side truss unit 1 through the three straight pipes 33, are connected with the inner ends of the extension rods 34 and are in rotating connection with the outer ends of the extension rods 34; the bottom straight pull support comprises two groups of triple pipes 31, a plurality of rotating parts 32 and a plurality of straight pipes 33, wherein the triple pipes 31 are respectively and rotatably connected with the lower end of the inner side channel steel 11 of the outermost side truss unit 1, the lower end of the outer side channel steel 11 of the outermost side truss unit 1 and the outer end of the extension rod 34 through the three straight pipes 33.
The steel strand penetrates into the steel pipe of the triple pipe 31, members at two ends are connected to form the inhaul cable, wherein the specific structure of the triple pipe 31 is shown in fig. 11a, and the specific structure of the rotating part 32 is shown in fig. 11 b.
(5) Meanwhile, innovation is realized at the truss connection point, the protruding end of the channel steel 11 at the connection position of the truss unit 1 and the support 3 is hollow, and the channel steel 11 is fixedly hinged with the straight pipe 33 through a screw nut, so that the bridge can be disassembled; at the joint of the outer truss unit 11, the channel steel 11 is connected with the channel steel 11 through screws and nuts, as shown in fig. 12 a; the channel steel and the C-shaped steel are connected in a mortise-tenon mode through bolts and nuts at the joint of the middle two truss units 11, and due to the connection design, the bridge can be disassembled, as shown in fig. 12 b.
The embodiment verifies and optimizes the design idea, and the specific contents are as follows:
1. MIDAS model establishment
The design model structure of the embodiment has 266 units and 85 nodes; there are 12 supports and 20 elastic connections in the boundary conditions. The model is shown in fig. 13.
The design of the embodiment gives the bridge a load of 4 tons per square meter, the sizes of the bridge deck units are 5mx5m, 4.5mx4.5m and 4mx4m, and the minimum plate unit can bear the weight of 64 tons. As is known, the weight of the armored vehicle is about 20-30 tons, and the bridge can be completely and quickly established to enable the armored vehicle to pass in the process of combat readiness. Through software analysis, it can be seen that the deformation is dominated by longitudinal vertical bending of the main bridge structure, as shown in table 2.
Analysis of the control deformation legend revealed a peak shift of 23.84 m. According to the using deflection value of the bridge, the allowable deflection value of the steel bridge is as follows: 40000x1/1000 is 40mm, which meets the design requirement. According to the analysis and verification, the established basic steel-framed bridge meets the design requirements, but still has the space for optimization processing.
2. Optimization design
In the design and search process of the embodiment, the section sizes of the channel steel 11, the steel column 13, the bottom surface cross web member, the side surface cross web member and the inhaul cable are all searched and designed and optimized. As can be seen by comparing the data in Table 2 and Table 3, the peak value of the displacement of the initial model is 76.83mm, the peak value of the displacement is now 23.84mm, and the peak value of the displacement after optimization is reduced by 68.97%. In the future, continuous optimization is performed on the aspects of deepening design of truss units, re-optimization of member parameters, re-optimization of connection design and the like, and the design of bridges is continuously improved.
TABLE 2 optimization front part node displacement data table
TABLE 3 optimized partial node displacement data sheet
| Node point | Load(s) | DX(mm) | DY(mm) | DZ(mm) | RX(rad]) | RY(rad]) | RZ(rad]) |
| 61 | 1 | -0.000796 | 0.00043 | -23.841486 | -0.000194 | 0.000001 | 0 |
| 19 | 1 | -0.0007971 | 0.000493 | -23.841132 | -0.000194 | 0.000001 | 0 |
| 80 | 1 | 0.000979 | 0.493882 | -23.787384 | -0.000158 | 0.000002 | 0 |
| 32 | 1 | 0.000984 | 0.493915 | -23.786936 | -0.000158 | 0.000002 | 0 |
| 69 | 1 | -0.37452 | 0 | -23.402002 | 0 | 0 | 0 |
| 25 | 1 | 0.374357 | 0 | 23.394015 | 0 | 0 | 0 |
| 79 | 1 | -0.992127 | 0.532963 | -22.718635 | -0.000117 | -0.004571 | -0.000007 |
| 31 | 1 | 0.993529 | 0.534663 | -22.70288 | -0.000115 | 0.0045731 | 0.000007 |
| 16 | 1 | 0.00012 | 0.026286 | -22.447531 | -0.000128 | -0.000001 | 0 |
| 59 | 1 | 0.000122 | 0.026236 | -22.447261 | -0.000128 | -0.000001 | 0 |
| 29 | 1 | -0.000929 | 0.363594 | -22.398411 | -0.000147 | -0.000001 | 0 |
| 78 | 1 | -0.000934 | 0.363548 | -22.39813 | -0.000147 | -0.000001 | 0 |
| 57 | 1 | 0.056587 | 0.01056 | -22.210014 | -0.000148 | -0.001708 | 0.00005 |
| 18 | 1 | -0.058039 | 0.009809 | -22.195324 | -0.000144 | 0.001713 | -0.000051 |
| 22 | 1 | 0.278075 | 0 | -22.050288 | 0 | 0 | 0 |
| 67 | 1 | -0.27877 | 0 | -22.044912 | 0 | 0 | 0 |
| 56 | 1 | 0.483539 | -0.01381 | -21.78306 | -0.000148 | -0.001708 | 0.00005 |
| 14 | 1 | -0.486391 | -0.0134971 | -21.766972 | -0.000144 | 0.001713 | -0.000051 |
| 77 | 1 | -2.13497 | 0.560525 | -21.575796 | -0.000117 | -0.004571 | -0.000007 |
| 37 | 1 | 2.136667 | 0.561763 | -21.559746 | -0.000115 | 0.004573 | 0.000007 |
| 28 | 1 | 1.045523 | 0.290285 | -21.163551 | -0.000152 | 0.003247 | -0.000022 |
| 74 | 1 | 0.046971 | 0.288644 | -21.153255 | -0.000153 | -0.003248 | 0.000022 |
| 15 | 1 | -0.091249 | 0.036307 | -21.053837 | -0.000095 | 0.0015541 | 0.000038 |
| 58 | 1 | 0.091382 | 0.037036 | -21.043706 | -0.000098 | -0.001557 | -0.000039 |
| 11 | 1 | -0.479818 | 0.003001 | -20.665267 | -0.000095 | 0.001554 | 0.000038 |
| 54 | 1 | 0.4806 | 0.002836 | -20.654487 | -0.000098 | -0.001557 | -0.000039 |
| 34 | 1 | 1.857213 | 0.333905 | -20.351866 | -0.000152 | 0.003247 | -0.000022 |
| 73 | 1 | 858928 | 0.332498 | -20.341303 | -0.000153 | -0.003248 | 0.000022 |
In summary, the self-balancing detachable truss bridge structure of the embodiment has the advantages that the overall type and size tend to be unified and standardized, industrial prefabrication production can be performed, and the construction period is greatly shortened to a certain extent; the structure module is single, and can be split into independent frameworks, so that the requirement of quick construction and disassembly is met, and the splicing speed is high; the modular design is adopted, so that the number of the modules can be increased and reduced as required, and free span is realized; the stress characteristics of a truss structure and a self-anchored suspension cable structure are combined to form a self-balancing system, a bracket and large machinery are not needed, the engineering quality is easy to control, the occupied field is small, and the influence of seasons is avoided; meanwhile, the equipment is large in storage, suitable for manual assembly and erection, diversified in adaptive span and convenient for transportation of general vehicles, has the advantages of convenience in erection and high withdrawing speed, and is worthy of popularization and use.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (4)
1. The utility model provides a truss bridge structures can be dismantled to self-balancing which characterized in that: the bridge deck comprises a plurality of steel plates paved at the bottom of each truss unit, one end of the cable assembly is connected with the upper end of the truss unit at the outermost side, and the other end of the cable assembly is connected with the lower end of the truss unit at the outermost side along the support;
the truss unit comprises a plurality of channel steel, a plurality of steel columns and four cross web members, the steel columns form a square frame, the channel steel is respectively arranged at four corners of the square frame, and the four cross web members are respectively arranged at the periphery of the square frame;
each group of supports comprises an upper diagonal draw support, a bottom straight draw support and an extension rod, wherein the extension rod extends outwards from the lower end of the outer side channel steel of the outermost side truss unit, one end of the upper diagonal draw support is rotatably connected with the upper end of the outer side channel steel of the outermost side truss unit, the other end of the upper diagonal draw support is rotatably connected with the outer end of the extension rod, one end of the bottom straight draw support is rotatably connected with the bottom of the outermost side truss unit, and the other end of the bottom straight draw support is rotatably connected with the outer end of the extension rod;
the upper diagonal support comprises a triple pipe, two rotating parts and three straight pipes, wherein the triple pipe comprises three connecting pipes which are connected together, and the three connecting pipes are respectively and rotatably connected with the upper end of the outer side channel steel of the outermost side truss unit, the inner end of the extension rod and the outer end of the extension rod through the three straight pipes; the bottom straight pull bracket comprises a triple pipe, two rotating parts and three straight pipes, wherein the triple pipe is respectively and rotatably connected with the lower end of the outermost side truss unit, the lower end of the outer side channel steel of the outermost side truss unit and the outer end of the extension rod through the three straight pipes;
the inhaul cable assembly is a steel strand, the steel strand sequentially penetrates through the two triple pipes, and two ends of the steel strand are connected with the upper end and the lower end of the outermost side truss unit respectively.
2. The self-balancing detachable truss bridge structure of claim 1, wherein: the channel steel of two adjacent truss units positioned on the outer side is detachably connected.
3. The self-balancing detachable truss bridge structure of claim 1, wherein: the truss unit comprises two truss units, wherein C-shaped steel is arranged on two channel steels on any side in the truss units, the C-shaped steel and the side channel steel are integrally formed, and the channel steel on the other side corresponding to the side is detachably connected with the C-shaped steel.
4. The self-balancing detachable truss bridge structure of claim 1, wherein: the rotation portion is in including setting up recess on the channel-section steel, setting are in jack on the straight tube, run through on the recess be provided with jack assorted through hole, the recess with the straight tube is realized articulated through the plug connector that passes through hole and jack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110495556.2A CN113463496B (en) | 2021-05-07 | 2021-05-07 | Self-balancing detachable truss bridge structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110495556.2A CN113463496B (en) | 2021-05-07 | 2021-05-07 | Self-balancing detachable truss bridge structure |
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