CN217460221U - Prefabricated assembled multi-beam combined steel truss web prestressed concrete beam bridge - Google Patents
Prefabricated assembled multi-beam combined steel truss web prestressed concrete beam bridge Download PDFInfo
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- CN217460221U CN217460221U CN202221620654.0U CN202221620654U CN217460221U CN 217460221 U CN217460221 U CN 217460221U CN 202221620654 U CN202221620654 U CN 202221620654U CN 217460221 U CN217460221 U CN 217460221U
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Abstract
The utility model discloses a prefabricated multi-beam combination formula steel truss web prestressed concrete girder bridge of assembling, including n single-beam, n single-beam transversely connects in parallel and sets up, and two adjacent single-beams pass through coupling assembling fixed connection, and the single-beam includes reinforced concrete bottom plate, reinforced concrete roof and steel truss web subassembly, and the reinforced concrete roof sets up directly over the reinforced concrete bottom plate, and the upper end of steel truss web subassembly is connected with the downside fixed connection of reinforced concrete roof, and the lower extreme of steel truss web subassembly is connected with reinforced concrete bottom plate fixed connection; the utility model discloses a divide into the single beam of a plurality of parallelly connected settings with the bridge to through coupling assembling with a plurality of single beam transverse connection of n, make the single beam share the load less, the matching of component size and structural stress is more high-efficient, therefore the bridge structural design is also nimble more and high-efficient, has that the structure dead weight is lighter, is favorable to the antidetonation, is convenient for transport and hoist and mount, reduces husky, the stone quantity, does benefit to the advantage of environmental protection.
Description
Technical Field
The utility model relates to a bridge technical field, concretely relates to precast multi-beam combination formula steel truss web prestressed concrete girder bridge of assembling.
Background
The prestressed concrete box girder widely used for the prestressed concrete girder bridge has the main advantages of light structure weight and large spanning capacity, is a steel-concrete structure bridge with small steel content, and has good economical efficiency. However, the steel-concrete joint between the bridge-type steel web member and the concrete slab has a complex structure, needs a large number of external prestressed tendons, is complicated in construction process and high in refinement requirement, can be constructed only by a method of cast-in-place of a transverse integral section, is very complex in a support or cantilever hanging basket and template system, is difficult to construct and slow in progress, is difficult to adopt a high-quality rapid construction method of assembly construction, and is not suitable for a modern bridge construction mode.
On the other hand, the conventional bridge with the span of 20-60 m accounts for the vast majority of all bridges. The prefabricated assembled prestressed concrete combined small box girder bridge and T-shaped girder bridge are most widely applied to conventional bridges due to mature technology, economic manufacturing cost and convenient construction, but have the defect of large self weight of the structure, are not beneficial to earthquake resistance on one hand and have poor applicability in high earthquake intensity areas; on the other hand, the spanning capability is limited, the design specifications of the existing highway bridge require that the span of the combined small box girder is not more than 40m, the span of the combined T-shaped girder is not more than 50m, and in fact, the T-shaped girder with the span of 50m is rarely applied because the single girder is too heavy and is easy to bend and destabilize. Therefore, in the common span range of 40-60 m, the small box girder bridge and the T-shaped girder bridge are difficult to be assembled by the prefabricated prestressed concrete which is economical and convenient, and generally steel structures or steel-concrete combined bridges are required, so that the construction cost is obviously increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that conventional prefabricated pin-connected panel prestressed concrete beam bridge is suitable for the span less, weight is great and anti-seismic performance is relatively poor, and conventional steel-concrete composite structure bridge cost is higher and the construction is more inconvenient. The prefabricated assembled multi-beam combined type steel truss web prestressed concrete girder bridge is light in weight, good in anti-seismic performance, large in applicable span and convenient to construct.
The utility model discloses a following technical scheme realizes:
a precast assembled multi-beam combined type steel truss web prestressed concrete girder bridge comprises:
the system comprises n single beams, wherein the n single beams are transversely arranged in parallel, two adjacent single beams are fixedly connected through a connecting assembly, n is more than or equal to 2, and n is a natural number;
the single beam includes:
a reinforced concrete bottom plate horizontally arranged;
a reinforced concrete top plate disposed directly above the reinforced concrete bottom plate;
the steel truss web assembly is arranged between the reinforced concrete bottom plate and the reinforced concrete top plate, the upper end of the steel truss web assembly is fixedly connected with the lower side surface of the reinforced concrete top plate, and the lower end of the steel truss web assembly is fixedly connected with the reinforced concrete bottom plate.
Specifically, the steel truss web assembly comprises:
the beam-end web members are fixedly arranged at two ends of the single beam and are fixedly connected with the reinforced concrete bottom plate and the reinforced concrete top plate;
the steel truss web, two steel truss webs symmetry sets up the both sides of the axis of monospar, just the upper end of steel truss web with reinforced concrete roof fixed connection, the lower extreme of steel truss web with reinforced concrete's bottom plate fixed connection.
Preferably, the reinforced concrete bottom plate has a width smaller than that of the reinforced concrete top plate;
two the steel truss web slope sets up, and two the distance between the steel truss web upper end is greater than the distance between the steel truss web lower extreme.
As a preferred embodiment, the beam-end web member is a box-shaped structure having the same cross section as that of the single beam, and the beam-end web member is a reinforced concrete member, a steel member, or a steel-concrete combined member;
the steel truss web comprises:
the upper chord steel structure is fixedly connected with the lower side surface of the reinforced concrete top plate;
the upper end of the steel web member is fixedly connected with the upper chord steel structure, the lower end of the steel web member is fixedly connected through a lower chord steel node, and the lower chord steel node is poured in the reinforced concrete bottom plate.
Specifically, the connecting point of the upper chord steel structure and the steel web is connected with the reinforced concrete top plate through a PBL shear key;
and a plurality of additional shear keys are arranged between every two adjacent PBL shear keys.
Preferably, the truss type of the steel web member adopts a pralat type, a Hualun type or a Hualun type with a vertical rod.
Further, the single beam also comprises a prestressed steel beam;
two ends of all the prestressed steel bundles are respectively anchored at two ends of the reinforced concrete bottom plate;
if the upper side surface of the reinforced concrete bottom plate is provided with the anchor blocks, two ends of part of the prestressed steel bundles are respectively anchored at two ends of the reinforced concrete bottom plate, and two ends of part of the prestressed steel bundles are respectively anchored at the anchor blocks.
Specifically, 2 of the n single beams are set as edge beams, and n-2 of the single beams are set as middle beams;
the boundary beam with between the center sill, the center sill with between the center sill pass through coupling assembling fixed connection, coupling assembling includes:
the beam end cross connection is fixedly arranged at the end part of the single beam and is fixedly connected with the beam end web member;
a beam-end beam joint fixedly disposed between two beam-end cross-links of two adjacent single beams;
the two ends of the cross-center transverse connection which are arranged at intervals are respectively and fixedly connected with the two adjacent single beams;
and the top plate joint is horizontally arranged between two adjacent reinforced concrete top plates, and the upper side surface of the top plate joint is superposed with the upper side surface of the reinforced concrete top plate.
Specifically, the midspan cross-over comprises:
the midspan horizontal rod is horizontally arranged, and two ends of the midspan horizontal rod are fixedly connected with the two adjacent reinforced concrete bottom plates respectively;
the middle-span inclined rods are obliquely arranged, the upper ends of the two middle-span inclined rods are fixedly connected with the two adjacent reinforced concrete top plates respectively, and the lower ends of the two middle-span inclined rods are fixedly connected with the middle part of the middle-span horizontal rod.
Preferably, the upper end of the midspan inclined rod is fixedly connected with the upper chord steel structure.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
the utility model discloses a divide into the roof beam bridge a plurality of single-beams that set up in parallel, and through coupling assembling with n single-beams transverse connection, make the single-beam share the load less, the matching of component size and structural stress is more high-efficient, therefore the bridge structural design is also more nimble and high-efficient, it is lighter to have the structure dead weight, be favorable to the antidetonation, be convenient for transportation and hoist and mount, reduce sand, the stone quantity, be favorable to the advantage of environmental protection, can have bigger leap ability on the basis of the dead weight is light, it is suitable for and strides the footpath and can reach more than 60 m;
in each single beam, the upper end of the steel truss web is connected with the reinforced concrete top plate, and the lower end of the steel truss web is connected with the reinforced concrete bottom plate, so that the steel-mixed connection structure is greatly simplified, compared with the common steel structure and steel-concrete structure bridges, the steel consumption is much less, the bridge manufacturing cost is obviously reduced, and generally only the prestressed steel beam is arranged in the reinforced concrete, thereby avoiding the external prestress with complex structure and higher price.
The multi-beam combined type steel truss web prestressed concrete girder bridge is built by adopting a prefabricated assembling method, a prefabricated template of a single beam is simple, hoisting construction can be realized by adopting a conventional bridge girder erection machine, and the problems of high construction difficulty and slow progress of the existing steel truss web prestressed concrete box girder are solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the principles of the invention.
Figure 1 is an elevation view of a single beam of a prefabricated assembled multi-beam combined steel truss web prestressed concrete girder bridge according to the present invention.
FIG. 2 is a sectional view taken along line I-I of FIG. 1.
FIG. 3 is a sectional view taken along line II-II of FIG. 1.
FIG. 4 is a sectional view taken along line III-III of FIG. 1.
FIG. 5 is a cross-sectional view of IV-IV of FIG. 1.
Figure 6 is a schematic view of a steel truss web according to the present invention.
Fig. 7 is a beam-ends section view of a prefabricated assembled multi-beam combined type steel truss web prestressed concrete beam bridge according to the utility model discloses.
Figure 8 is a cross section view of a prefabricated assembled multi-girder combined steel truss web prestressed concrete girder bridge.
Reference numerals: the steel beam comprises a 1-reinforced concrete bottom plate, a 2-reinforced concrete top plate, a 3-steel web member, a 4-upper chord steel structure, a 5-beam end web member, a 6-beam end cross joint, a 7-mid-span horizontal rod, an 8-mid-span inclined rod, a 9-anchor block, a 10-prestress steel beam, an 11-PBL shear key, a 12-additional shear key, a 13-lower chord steel node, a 14-top plate joint and a 15-beam end cross beam joint.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the invention.
It should be noted that, for convenience of description, only the parts related to the present invention are shown in the drawings.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.
In the case of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail with reference to the accompanying drawings in conjunction with embodiments.
Example one
A prefabricated assembled multi-beam combined type steel truss web prestressed concrete girder bridge comprises n single beams, 2 of the n single beams are set as boundary beams, n-2 of the n single beams are set as middle beams, n is more than or equal to 2, and n is a natural number;
the n single beams are transversely arranged in parallel, and two adjacent single beams are fixedly connected through the connecting assembly, namely the edge beams and the middle beams are fixedly connected through the connecting assembly, and the middle beams are fixedly connected through the connecting assembly.
As shown in fig. 1, the single girder includes a reinforced concrete bottom plate 1, a concrete top plate, and a steel truss web assembly.
The reinforced concrete bottom plate 1 is horizontally arranged, and the reinforced concrete top plate 2 is arranged right above the reinforced concrete bottom plate 1;
the reinforced concrete top plate 2 and the reinforced concrete bottom plate 1 can be parallel or not parallel, and the state is generally determined by the cross slope of the bridge. When the bridge cross slope is small, the top plate can be parallel to the bottom plate; when the bridge cross slope is large, the top plate can be made into a certain cross slope to adapt to the cross slope of the bridge.
The steel truss web assembly is arranged between the reinforced concrete bottom plate 1 and the reinforced concrete top plate 2, the upper end of the steel truss web assembly is fixedly connected with the lower side face of the reinforced concrete top plate 2, and the lower end of the steel truss web assembly is fixedly connected with the upper side face of the reinforced concrete bottom plate 1.
As shown in fig. 2 to 5, a reinforced concrete top plate 2, a reinforced concrete bottom plate 1 and a steel truss web assembly together form a beam bridge structure with a box-shaped cross section.
The steel truss web assembly comprises a beam end web member 5 and a steel truss web.
As shown in fig. 1 and 5, the beam-end web members 5 are fixedly disposed at both ends of the single beam and fixedly connected to the reinforced concrete bottom plate 1 and the reinforced concrete top plate 2, the beam-end web members 5 are box-shaped structures having the same cross section as that of the single beam, and the beam-end web members 5 are reinforced concrete members, steel members or steel-concrete combined members, by which the support reaction force can be reliably transmitted and the beam-end transverse rigidity can be enhanced.
As shown in fig. 2-4, two steel truss webs are symmetrically arranged on two sides of the central axis of the single beam, the upper ends of the steel truss webs are fixedly connected with the reinforced concrete top plate 2, and the lower ends of the steel truss webs are fixedly connected with the reinforced concrete bottom plate.
As a preferable structure, the width of the reinforced concrete bottom plate 1 is set to be smaller than that of the reinforced concrete top plate 2, so that two steel truss webs are obliquely arranged and the distance between the upper ends of the two steel truss webs is greater than that between the lower ends of the steel truss webs.
In addition, the single beam also comprises prestressed steel beams 10;
and (4) mounting the prestressed steel bundles 10 according to actual conditions.
In this embodiment, both ends of the prestressed steel strand 10 may be anchored to the ends of the reinforced concrete floor 1, or a part thereof may be anchored to an anchor block on the upper side of the reinforced concrete floor 1.
When the anchor blocks 9 are arranged on the upper side face of the reinforced concrete base plate 1, two ends of a part of the prestressed steel bundles 10 are respectively anchored at two ends of the reinforced concrete base plate 1, and two ends of a part of the prestressed steel bundles 10 are respectively anchored at the anchor blocks 9;
when the anchor block 9 is not arranged on the upper side surface of the reinforced concrete bottom plate 1, two ends of all the prestressed steel bundles 10 are respectively anchored at two ends of the reinforced concrete bottom plate 1.
Example two
The structure of steel truss web is optimized to this embodiment, and the steel truss web includes last string steel construction 4 and steel web member 3, and last string steel construction 4 is steel sheet or girder steel.
The upper chord steel structure 4 is fixedly connected with the lower side surface of the reinforced concrete top plate 2, the upper chord steel structure 4 is fixedly connected with the reinforced concrete top plate 2 through shear keys, and in the embodiment, the shear keys comprise PBL shear keys 11 and additional shear keys 12.
The upper end of the steel web member 3 is fixedly connected with the upper chord steel structure 4 by welding, the junction of the lower end of the steel web member 3 is consolidated through a lower chord steel node 13, and the lower chord steel node 13 is poured in the reinforced concrete bottom plate 1 to be consolidated, so that the connection between the steel truss web and the reinforced concrete bottom plate 1 is realized.
As shown in fig. 6, the connecting point of the upper chord steel structure 4 and the steel web member 3 is connected with the reinforced concrete roof 2 through a PBL shear key 11; a plurality of additional shear keys 12 are arranged between two adjacent PBL shear keys 11.
The pura special type [ Pratt ], goren type [ Warren ] or goren type [ Warren with verticals ] is adopted in the truss type of the steel web member 3, the utility model discloses in give the pura special type [ Pratt ] truss type.
EXAMPLE III
In one embodiment, the connection of the plurality of single beams is achieved by a connection assembly comprising beam end crossbars 6, beam end beam joints 15, midspan crossbars and roof joints 14.
As shown in fig. 7, the beam-end cross-link 6 is fixedly arranged at the end of the single beam and is fixedly connected with the beam-end web member 5; the beam end cross beam joint 15 is fixedly arranged between two beam end cross links 6 of two adjacent single beams; the beam-end web members 5 at the ends of the single beam are fixedly connected into an integral structure by the connection of the beam-end cross-links 6 and the beam-end cross-beam joints 15.
The quantity of cross-connection in striding is a plurality of, and a plurality of cross-connections in striding set up along the axis of girder bridge, and the both ends of cross-connection in striding that the interval set up respectively with two adjacent monospar fixed connection, realize the fixed connection of two adjacent monospar through cross-connection in striding.
The roof joint 14 is horizontally arranged between two adjacent reinforced concrete roof panels 2, the upper side surface of the roof joint 14 is overlapped with the upper side surface of each reinforced concrete roof panel 2, and the upper side surface of the roof joint 14 and the upper side surface of each reinforced concrete roof panel 2 form the upper side surface of the bridge.
As shown in fig. 8, the midspan cross-bar comprises a midspan horizontal bar 7 and a midspan inclined bar 8.
Stride well horizon bar 7 level setting, and stride the both ends of well horizon bar 7 respectively with two adjacent reinforced concrete bottom plates 1 fixed connection, stride well horizon bar 7 promptly and set up with the axis of girder bridge is perpendicular.
The middle-span inclined rods 8 are obliquely arranged, the upper ends of the two middle-span inclined rods 8 are fixedly connected with the two adjacent reinforced concrete top plates 2 respectively, and the lower ends of the two middle-span inclined rods 8 are fixedly connected with the middle parts of the middle-span horizontal rods 7.
In order to ensure that the midspan inclined rod 8 can be stably connected with the reinforced concrete roof 2, the upper end of the midspan inclined rod 8 is fixedly connected with the upper chord steel structure 4.
The one-connection prefabricated assembled multi-beam combined type steel truss web prestressed concrete beam bridge comprises one span or multiple spans, and when the one-connection prefabricated multi-beam combined type steel truss web prestressed concrete beam bridge comprises multiple spans, adjacent spans are connected at the beam ends in a mode of simply supporting first and then structurally continuous or bridge deck continuous.
Compared with the existing steel truss web prestressed concrete girder bridge with a transverse integral cross section, the prefabricated assembled multi-girder combined steel truss web prestressed concrete girder bridge adopts a multi-piece prefabricated single girder combination mode of 'breaking the whole into parts'. The load shared by the steel truss web prestressed concrete single beam is small, the matching of the component size and the structural stress is more efficient, and the design of the bridge structure is more flexible and efficient. In each single beam, the steel truss web is connected with the reinforced concrete top plate 2 by arranging a shear key on the top surface of a steel plate or a steel beam arranged on the upper chord along the longitudinal through length of the bridge, and the lower end of the steel truss web is connected with the reinforced concrete bottom plate 1 by adopting a reinforced concrete joint with smaller structural dimension, so that the steel-mixed connection structure is greatly simplified, and the stress requirement can be met only by arranging prestress in the reinforced concrete, thereby avoiding the external prestress with complicated structure and higher price.
The multi-beam combined type steel truss web prestressed concrete girder bridge is built by adopting a prefabricated assembling method, a prefabricated template of a single beam is simple, hoisting construction can be realized by adopting a conventional bridge girder erection machine, and the problems of high construction difficulty and slow progress of the existing steel truss web prestressed concrete box girder are solved.
Compared with the prior common prefabricated assembled prestressed concrete combined small box girder bridge and T-shaped girder bridge, the prefabricated assembled multi-girder combined steel truss web prestressed concrete girder bridge has the advantages of lighter structural dead weight, contribution to earthquake resistance, convenience in transportation and hoisting, reduction in the using amount of sand and stone, contribution to environmental protection, larger spanning capacity and applicability to the span of more than 60 m. Compared with the common steel structure and steel-concrete structure bridge, the steel consumption is much less, the bridge cost is obviously reduced, and the bridge still has the advantages of convenient construction and rapid progress.
Example four
The present embodiment provides the prefabrication and installation method of the above embodiment.
The implementation of the prefabricated assembled multi-beam combined steel truss web prestressed concrete girder bridge mainly comprises two parts of design and construction.
The design system is based on the concept of the bridge type, bridge span arrangement and main sizes of all parts are planned according to bridge construction conditions, road grades and technical standards, and design and checking calculation are carried out according to the current bridge design specification regulations in China so as to meet the requirements of structural safety and use functions.
The prefabricated assembled multi-beam combined steel truss web prestressed concrete beam is constructed by adopting a prefabricated hoisting method.
Prefabricating a single-piece beam: prefabricating in a factory or a beam making field, wherein the main prefabricating procedures are as follows: preparing single beam prefabrication equipment, a bed-jig, a pedestal, a support and a template → processing and manufacturing each steel member of the steel truss web → erecting and installing the steel truss web assembly support [ the bed-jig ] above the pedestal in place → hoisting the steel truss web onto the support [ the bed-jig ] in sections to be reliably fixed and assembled to be connected into a whole → installing a bottom template, a top template → installing a top plate, bottom plate steel bars, prestressed steel bundles 10 → pouring a bottom plate, top plate concrete → concrete curing → tensioning the bottom plate prestressed steel bundles 10 after the concrete strength meets the design requirement, completing the prefabrication of the single beam → moving the prefabricated single beam to a beam storage area or transporting the single beam to a bridge site to be installed.
Erection and installation on site: transporting the prefabricated single beams required by each bridge to a bridge construction site → arranging the single beam lifting frames on bridge abutments by using a bridge girder erection machine or a crane according to the designed positions and sequences → carrying out transverse connection between the single beams in each bridge and bridge deck joint construction to form the whole bridge girder in each bridge → carrying out structural continuous construction between the bridge spans in each bridge or continuous construction of the bridge deck → carrying out construction of auxiliary structures of the bridge deck → finishing the construction of the upper structure of the prefabricated assembled multi-beam combined type steel truss web prestressed concrete beam bridge in the designed range.
In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
It will be understood by those skilled in the art that the foregoing embodiments are provided for clarity of description only, and are not intended to limit the scope of the invention. Other variations or modifications to the above described embodiments will be apparent to those skilled in the art and are within the scope of the invention.
Claims (10)
1. The utility model provides a precast assembling multi-beam combination formula steel truss web prestressed concrete girder bridge which characterized in that includes:
the system comprises n single beams, wherein the n single beams are transversely arranged in parallel, two adjacent single beams are fixedly connected through a connecting assembly, n is more than or equal to 2, and n is a natural number;
the single beam includes:
a reinforced concrete bottom plate (1) horizontally arranged;
a reinforced concrete top plate (2) arranged right above the reinforced concrete bottom plate (1);
the steel truss web assembly is arranged between the reinforced concrete bottom plate (1) and the reinforced concrete top plate (2), the upper end of the steel truss web assembly is fixedly connected with the lower side face of the reinforced concrete top plate (2), and the lower end of the steel truss web assembly is fixedly connected with the reinforced concrete bottom plate (1).
2. The precast assembled multi-girder composite steel truss web prestressed concrete girder bridge of claim 1, wherein the steel truss web assembly comprises:
the beam-end web members (5) are fixedly arranged at two ends of the single beam and are fixedly connected with the reinforced concrete bottom plate (1) and the reinforced concrete top plate (2);
the steel truss web, two the steel truss web symmetry sets up the both sides of the axis of monospar, just the upper end of steel truss web with reinforced concrete roof (2) fixed connection, the lower extreme of steel truss web with reinforced concrete's bottom plate fixed connection.
3. The precast assembled multi-girder combined steel truss web prestressed concrete girder bridge according to claim 2, wherein the width of the reinforced concrete bottom plate (1) is smaller than that of the reinforced concrete top plate (2);
two the steel truss web slope sets up, and two the distance between the steel truss web upper end is greater than the distance between the steel truss web lower extreme.
4. The precast assembled multi-girder combined steel truss web prestressed concrete girder bridge as claimed in claim 2, wherein the girder-end web member (5) is a box-type structure having the same cross-section as that of the single girder, and the girder-end web member (5) is a reinforced concrete member, a steel member or a steel-concrete combined member;
the steel truss web comprises:
the upper chord steel structure (4) is fixedly connected with the lower side surface of the reinforced concrete top plate (2);
the upper end of the steel web member (3) is fixedly connected with the upper chord steel structure (4), the lower end of the steel web member (3) is fixedly connected through a lower chord steel node (13), and the lower chord steel node (13) is poured in the reinforced concrete bottom plate (1).
5. The precast assembled multi-girder combined steel truss web prestressed concrete girder bridge as claimed in claim 4, wherein the connection point of the upper chord steel structure (4) and the steel web member (3) is connected with the reinforced concrete roof slab (2) through a PBL shear key (11);
a plurality of additional shear keys (12) are arranged between two adjacent PBL shear keys (11).
6. The precast assembled multi-girder combined steel truss web prestressed concrete girder bridge according to claim 5, wherein the truss type of the steel web member (3) is a pralat type, a Hualun type or a Hualun type with a vertical bar.
7. The precast assembled multi-girder composite steel truss web prestressed concrete girder bridge according to claim 4, wherein the single girder further comprises prestressed steel strands (10);
two ends of all the prestressed steel bundles (10) are respectively anchored at two ends of the reinforced concrete bottom plate (1);
if the upper side surface of the reinforced concrete bottom plate (1) is provided with the anchor blocks (9), two ends of a part of the prestressed steel bundles (10) are respectively anchored at two ends of the reinforced concrete bottom plate (1), and two ends of a part of the prestressed steel bundles (10) are respectively anchored at the anchor blocks (9).
8. The precast assembled multi-girder combined steel truss web prestressed concrete girder bridge as claimed in any one of claims 4 to 7, wherein 2 of the n single girders are set as boundary girders and n-2 are set as middle girders;
the boundary beam with between the center sill, the center sill with between the center sill pass through coupling assembling fixed connection, coupling assembling includes:
the beam end cross connection (6) is fixedly arranged at the end part of the single beam and is fixedly connected with the beam end web member (5);
a beam-end cross-beam joint (15) fixedly arranged between two beam-end cross-links (6) of two adjacent single beams;
the two ends of the midspan transverse links which are arranged at intervals are respectively and fixedly connected with the two adjacent single beams;
a roof seam (14) which is horizontally arranged between two adjacent reinforced concrete roofs (2), and the upper side surface of the roof seam (14) is superposed with the upper side surface of the reinforced concrete roof (2).
9. The precast assembled multi-girder composite steel truss web prestressed concrete girder bridge of claim 8, wherein the midspan cross-link comprises:
the midspan horizontal rod (7) is horizontally arranged, and two ends of the midspan horizontal rod (7) are respectively and fixedly connected with the two adjacent reinforced concrete bottom plates (1);
the middle-span inclined rods (8) are obliquely arranged, the upper ends of the two middle-span inclined rods (8) are respectively and fixedly connected with the two adjacent reinforced concrete top plates (2), and the lower ends of the two middle-span inclined rods (8) are fixedly connected with the middle parts of the middle-span horizontal rods (7).
10. The precast split multi-girder combined steel truss web prestressed concrete girder bridge as claimed in claim 9, wherein the upper ends of the mid-span inclined bars (8) are fixedly connected with the upper chord steel structure (4).
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| CN202221620654.0U CN217460221U (en) | 2022-06-27 | 2022-06-27 | Prefabricated assembled multi-beam combined steel truss web prestressed concrete beam bridge |
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| CN202221620654.0U CN217460221U (en) | 2022-06-27 | 2022-06-27 | Prefabricated assembled multi-beam combined steel truss web prestressed concrete beam bridge |
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2022
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