CN212925728U - Steel truss arch bridge - Google Patents
Steel truss arch bridge Download PDFInfo
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- CN212925728U CN212925728U CN202021083128.6U CN202021083128U CN212925728U CN 212925728 U CN212925728 U CN 212925728U CN 202021083128 U CN202021083128 U CN 202021083128U CN 212925728 U CN212925728 U CN 212925728U
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Abstract
The utility model discloses a steel truss arch bridge, steel truss arch bridge include main mound, tie rod, steel-pipe pile, interim buttress, chord member, jib, support steel pipe, support cat ladder, well style of calligraphy ladder, reinforcing bar string cage, leveling steel pipe, H crossbeam, removal longeron, passageway channel-section steel, take safe green net guardrail, flange plate, steel pipe stand, bed-jig, prevent weighing down the net, rest platform, indulge horizontal bridge to construction path, wooden springboard, guardrail net arch rib, the utility model discloses a sequence that arches after the bridge of elder generation is under construction, carries out the side span earlier and combines the section installation, carries out midspan bridge panel installation again, carries out main arch rib jib, chord member, cross-under, parallel under, web member erection construction at last, utilizes interim buttress system auxiliary construction, and interim support lateral part sets up safety protection cat ladder and well style of calligraphy ladder, takes construction path between the interim support.
Description
Technical Field
The utility model relates to a steel purlin arched bridge engineering system field specifically is a steel purlin arched bridge.
Background
Along with the development of economic society, the urbanization process is accelerated, the living standard of people is also continuously improved, the bridge is no longer a traffic road to people, the practicability of the bridge needs to be met, in addition, people pay more attention to the attractiveness of the bridge, the bridge occupies less space, and the space is saved. Since the early steel bridge is mainly used in railway and highway design and is limited by conditions, the basic installation mode is the installation construction by the arch-first and beam-second method, and a novel construction method, namely the beam-first and arch-second method, is generated later, wherein the domestic famous method is the banyangjiang grand bridge of the deep railway of the building.
In the construction process of the first-bridge and the second-arch large-span steel truss arch bridge, the following problems often exist: (1) the construction line type control difficulty is high, the steel truss arch rod pieces are in a bolt connection mode, and the precision requirement is high; (2) the midspan of the bridge is a large-span river-crossing region, and geological conditions cannot meet the requirement of bearing capacity of a bridge erection support foundation; (3) the main truss structure size is big, and tie rod and crossbeam installation difficulty, workman transform the operation between each part and operate inconveniently, and the security can not guarantee.
In view of this, in order to improve steel purlin arch bar piece installation accuracy, cross the regional bridge support frame and erect and satisfy the bearing capacity requirement of river, improve steel purlin arch bridge efficiency of construction, make things convenient for the workman the operation between each part, increased factor of safety, the utility model relates to a simple effectual steel purlin arch bridge and construction method are urgently waited for.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a steel purlin arched bridge to improve steel purlin arch member installation accuracy and efficiency of construction, make things convenient for the operation of workman between each part, increase factor of safety.
In order to achieve the above purpose, the utility model discloses the technical scheme who adopts is:
the utility model provides a steel truss arch bridge, is close to the main mound on vertical both sides including standing in aqueous, and the aquatic that is located between main mound and the corresponding side bank still respectively erects to being provided with the side span buttress, is located the steel-pipe pile that the aquatic was found to being provided with a plurality of violently indulges ranks and distributes between the side span buttress, is connected with the midspan tie rod between each steel-pipe pile, and main mound is connected its characterized in that through side span lower chord and a steel-pipe pile that is close to corresponding this main mound of side bank next-door neighbour: each steel pipe pile is respectively connected with a temporary buttress, each temporary buttress is in a lattice column form formed by a plurality of vertical support steel pipes, the lower end of each support steel pipe is respectively fixed at the upper end of the corresponding steel pipe pile, the upper end of each support steel pipe in each transverse temporary buttress is jointly supported and fixed with an H-beam pair, the H-beam pair is formed by a pair of H-beams, a plurality of H-beam connecting steels are connected between the two H-beams in each H-beam pair, the H-beam pair transversely spans on water, the top positions of the two H-beams corresponding to each temporary buttress are respectively and fixedly provided with a support structure formed by a leveling steel pipe and a jack, each support structure is jointly supported and fixed with a tie rod by the leveling steel pipe and the jack top, the tops of all the H-beam pairs are also jointly supported and fixed with a plurality of movable longitudinal beams extending along the longitudinal direction, the movable longitudinal beams are correspondingly positioned between the adjacent two longitudinal support structures one, the tops of all the movable longitudinal beams are matched with and supported and fixed with a plurality of cross beams, the cross beams are parallel to H cross beam pairs in a one-to-one correspondence mode, tie bars at the tops of all the H cross beam pairs are supported and fixed to the corresponding cross beams respectively, notches are formed in the tops of the tie bars, the cross beams are clamped and fixed in the notches at the tops of the corresponding tie bars, high-strength bolts are arranged in the notches of the tie bars to fix clamped parts of the cross beams, and bridge decks are laid at the tops of the;
a support crawling ladder is arranged on one side inside each temporary buttress respectively and is fixed on a support steel pipe in the corresponding direction; set up the longitudinal bridge between the adjacent fore-and-aft interim buttress and to the construction passageway, set up the horizontal bridge between the adjacent horizontal interim buttress and to the construction passageway, and the longitudinal bridge all is fixed in the support steel pipe that corresponds the interim buttress of direction to the tip of construction passageway, horizontal bridge.
Each temporary buttress close to the river bank on one side is provided with a # -shaped ladder on one side facing the corresponding river bank on the corresponding side, each # -shaped ladder is composed of a plurality of steel pipe stand columns, a jig frame which is connected between the steel pipe stand columns and bent upwards, pedals and rest platforms which are laid in the jig frame, and a protective net which is arranged between the adjacent steel pipe stand columns, and the steel pipe stand column of each # -shaped ladder is connected with a support steel pipe in the corresponding temporary buttress through a connecting channel steel;
the bridge deck is characterized in that a mid-span lower chord and a mid-span upper chord positioned above the mid-span lower chord are longitudinally spanned above the side edges of the bridge deck, two ends of the mid-span lower chord are respectively fixed to main piers on corresponding sides, two ends of the mid-span upper chord are respectively fixedly connected to side-span buttresses on corresponding sides through side-span tie rods, a plurality of vertical rods are connected between the mid-span upper chord and the mid-span lower chord, a plurality of suspension rods are fixedly connected to a cross beam upwards, the suspension rods are fixedly connected to the connecting positions of the lower ends of the vertical rods on the mid-span lower chord in a one-to-one correspondence manner, diagonal web members are respectively connected between the connecting position of each vertical rod and the mid-span upper chord and the connecting position of the vertical rod and the mid-span lower;
the bottom of the mid-span lower chord between adjacent gusset plates is respectively fixed with an arch rib bottom plate, two sides of the arch rib bottom plate are respectively upwards connected with an arch rib web, an arch rib top plate is connected between the tops of the arch rib webs, the mid-span lower chord at the corresponding position is surrounded by the arch rib bottom plate, the arch rib web and the arch rib top plate, a steel plate is laid and fixed above the arch rib top plate, guardrail reinforcing steel bars are fixed on two sides of the upper part of the steel plate, and guardrail nets are bound on the guardrail reinforcing steel bars.
A steel purlin arched bridge, its characterized in that: each steel pipe pile is composed of a plurality of pile bodies with the quantity consistent with that of support steel pipes in corresponding temporary buttresses, steel pipe pile reinforcing steel is horizontally connected between the pile bodies, the upper ends of the pile bodies in the steel pipe piles are fixedly connected with the lower ends of the support steel pipes in a one-to-one correspondence mode through flange plates, and stiffening plates are welded at the positions of the flange connections.
A steel purlin arched bridge, its characterized in that: the longitudinal bridge is laid by a pair of channel steel separately to construction channel, horizontal bridge to construction channel and is constituted, and channel steel both ends difference fixed connection is in the support steel pipe that corresponds the position, is connected with a plurality of angle irons of strengthening between the two channel steel, lays respectively on a plurality of angle irons of strengthening and is fixed with the plank, and every channel steel top pterygoid lamina still is fixed with the guardrail respectively, sets up safe filter screen in the guardrail.
A steel purlin arched bridge, its characterized in that: the bed-jig in every # -shaped ladder corresponds the footboard both sides position and is fixed with the guardrail respectively, and the rest platform in the # -shaped ladder comprises a plurality of platform crossbeams that weld in the bed-jig.
A steel purlin arched bridge, its characterized in that: and reinforcing steel bar hanging cages are respectively fixed on two sides of the arch rib top plate above the mid-span lower chord between every two adjacent gusset plates, the reinforcing steel bar hanging cages are formed by welding reinforcing steel bars, the upper parts of the reinforcing steel bar hanging cages are fixed on the corresponding sides of the arch rib top plate in an overlapping manner, and wood springboards are arranged between the lower parts of the reinforcing steel bar hanging cages on two sides.
The utility model has the following characteristics and beneficial effect:
(1) the utility model discloses set up interim buttress and assist steel purlin arch member installation, the effectual regional geological conditions of having solved across the river can't satisfy the bridge and erect support foundation bearing capacity scheduling problem.
(2) The utility model discloses a set up leveling steel pipe, remove the longeron and can conveniently adjust the position of tie rod and crossbeam, reduce the downwarping of crossbeam.
(3) The utility model discloses a construction order of "arch after the bridge earlier", advance the limit and stride and combine section decking installation, carry out midspan decking installation again, carry out the installation of upper portion bow member at last, the line type control is easy between the steel purlin arch bar spare, and the bolt structure precision is high.
(4) The utility model discloses a support cat ladder, well word ladder make constructor can climb to support upper portion construction platform by the support bottom and be under construction, prevent the safety when using of weight net has guaranteed the workman from top to bottom.
(5) The utility model discloses set up between interim buttress and indulge horizontal construction passageway, great having made things convenient for constructor to link up the operation between the support.
(6) The utility model discloses when the bow member is under construction, chord member upper portion sets up arch rib construction passageway under the midspan, sets up reinforcing bar at arch rib member bolt joint position department and hangs cage and wooden springboard, constitutes construction platform and temporary channel and supplies constructor construction and walking, great having made things convenient for the workman to alternate the operation between each member, has improved the efficiency of construction.
Drawings
FIG. 1 is a schematic view of the overall structure of the steel truss arch bridge of the present invention;
FIG. 2 is a structural view of the temporary buttress support steel truss arch bridge of the present invention;
FIG. 3 is a plan view of the connection of the temporary buttress to the H-beam;
FIG. 4 is a side view of FIG. 2;
FIG. 5 is a connecting structure diagram of a support steel pipe and a steel pipe pile;
FIG. 6 is a plan view showing the connection of the steel pipe with the steel pipe pile;
FIG. 7 is a view showing an overall connection structure of the support steel pipe and the steel pipe pile;
FIG. 8 is a plan view of the well ladder;
FIG. 9 is a cross ladder configuration;
FIG. 10 is a structure diagram of a cage arrangement of a cross-shaped ladder;
FIG. 11 is a plan view of a longitudinal and transverse bridge oriented construction pathway;
FIG. 12 is a plan view of a standard sheet body consisting of channel steel and reinforcing angle steel;
FIG. 13 is a cross-sectional view of a longitudinal and transverse bridge construction channel structure;
FIG. 14 is an enlarged partial view of a mid-span lower chord installation channel;
FIG. 15 is a cross-sectional view of a mid-span lower chord construction channel;
FIG. 16 is a schematic view of the connection of a mid-span lower chord with a steel bar cage;
FIG. 17 is a cross-sectional view of a mid-span lower chord attached to a rebar cage;
fig. 18 is a side cross-sectional view of a rebar hanger cage.
Wherein: 1-main pier; 2-side span buttress; 3-mid-span tie bar; 4-side span tie bar; 5-steel pipe pile; 6-temporary branch
Upsetting; 7-side span lower chord; 8-mid-span upper chord; 9-diagonal web members; 10-vertical rod; 11-mid-span lower chord; 12-a boom; 13-support steel tube; 14-supporting channel steel; 15-support angle steel; 16-support ladder climbing; 17-connecting channel steel; 18-a # -shaped ladder; 19-rib floor; 20-hanging a steel bar cage; 21-leveling the steel pipe; 22-jack; 23-a bridge deck; a 24-H beam; 25-a tie bar; 26-a cross beam; 27-moving the longitudinal beam; 28-channel steel; 29-secure green net; 30-H beam connecting steel; 31-high strength bolts; 32-safety green net guard bar; 33-flange plate; 34-a stiffening plate; 35-reinforcing steel for the steel pipe pile; 36-steel tube column; 37-a jig frame; 38-anti-falling net; 39-stepping; 40-a resting platform; 41 a platform beam; 42-a guardrail; 43-transverse bridge construction channel; 44-longitudinal bridge construction channel; 45-wood gangplank; 46-reinforcing angle steel; 47-wood board; 48-gusset plates; 49-guardrail net; 50-guardrail steel bars; 51-steel plate; 52 a rib top plate; 53-rib web.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
As shown in fig. 1-18, a steel truss arch bridge comprises main piers 1 erected in water and close to two longitudinal banks, side-span buttresses 2 respectively vertically arranged in water between the main piers 1 and corresponding side banks, a plurality of steel pipe piles 5 distributed in transverse and longitudinal rows and columns in water and vertically arranged between the side-span buttresses 2, a mid-span tie bar 3 connected between each steel pipe pile 5, the main pier 1 connected with one steel pipe pile close to the main pier 1 through a side-span lower chord 7, each steel pipe pile 5 connected with a temporary buttress 6, each temporary buttress 6 in a lattice column form formed by a plurality of vertical support steel pipes 13, the lower end of each support steel pipe 13 fixed on the upper end of the corresponding steel pipe pile 5, the upper ends of the support steel pipes 13 in each transverse temporary buttress 6 supported and fixed with an H beam pair, the H beam pair is formed by a pair of H beams 24, the H-beam pairs transversely span on water, the top positions of two H-beams 24 corresponding to each temporary buttress 6 are respectively fixed with a support structure consisting of a leveling steel pipe 21 and a jack 22, the top of each leveling steel pipe 21 and the top of the jack 22 in each support structure are jointly supported and fixed with a tie bar 25, the tops of all the H-beam pairs are also jointly supported and fixed with a plurality of movable longitudinal beams 27 extending along the longitudinal direction, the movable longitudinal beams 27 are correspondingly positioned between the adjacent two longitudinal support structures one by one, the tops of all the movable longitudinal beams 27 are jointly matched and supported and fixed with a plurality of cross beams 26, the cross beams 26 are correspondingly parallel to the H-beam pairs one by one, the tie bars at the tops of all the H-beam pairs are respectively supported and fixed with the corresponding cross beams 26, and bridge decks 23 are;
a support ladder stand 16 is arranged on one side inside each temporary buttress 6, and the support ladder stand 16 is fixed on the support steel pipe 13 in the corresponding direction; a longitudinal direction construction channel 44 is erected between the adjacent longitudinal temporary buttresses 6, a transverse direction construction channel 43 is erected between the adjacent transverse temporary buttresses 6, and the end parts of the longitudinal direction construction channel 44 and the transverse direction construction channel 43 are fixed on the support steel pipes 13 of the temporary buttresses 6 in the corresponding directions;
each temporary buttress 6 close to one of the banks is provided with a cross ladder 18 on one side facing the corresponding bank, each cross ladder 18 is composed of a plurality of steel tube columns 36, a jig frame 37 connected between the steel tube columns 36 and bent upwards, a pedal 39 and a rest platform 40 laid in the jig frame 37 and a protective net 38 arranged between the adjacent steel tube columns, and the steel tube column 36 of each cross ladder 18 is connected with the support steel tube 13 in the corresponding temporary buttress 6 through a connecting channel steel 17;
a mid-span lower chord 11 and a mid-span upper chord 8 positioned above the mid-span lower chord 11 are longitudinally spanned above the side edges of the bridge deck, two ends of the mid-span lower chord 11 are respectively fixed on the main piers 1 at the corresponding sides, two ends of the mid-span upper chord 8 are respectively fixedly connected to the side-span buttresses 2 at the corresponding sides through side-span tie rods 4, a plurality of vertical rods 10 are connected between the mid-span upper chord 8 and the mid-span lower chord 11, a plurality of suspension rods 12 are upwards fixedly connected to a cross beam 26, the suspension rods 12 are fixedly connected to the connecting positions of the lower ends of the vertical rods 10 at the mid-span lower chord 8 in a one-to-one correspondence manner, diagonal web members 9 are respectively connected between the connecting position of each vertical rod 10 and the mid-span upper chord 8 and the connecting position of the vertical rod and the mid-span lower chord 11 at the adjacent side, and node plates 48;
the bottom of the mid-span lower chord 11 between the adjacent gusset plates 48 is respectively fixed with an arch rib bottom plate 19, two sides of the arch rib bottom plate 19 are respectively and upwards connected with an arch rib web 53, an arch rib top plate 52 is connected between the tops of the arch rib webs 53, the mid-span lower chord 11 at the corresponding position is surrounded by the arch rib bottom plate 19, the arch rib web 53 and the arch rib top plate 52, a steel plate 51 is laid and fixed above the arch rib top plate 52, guardrail steel bars 50 are fixed on two sides of the upper part of the steel plate 51, and guardrail nets 49 are bound on the guardrail steel bars 50.
The utility model discloses in, be connected with a plurality of H roof beams even steel 30 between two H crossbeams 24 of every H crossbeam centering.
Each steel pipe pile 5 is composed of a plurality of pile bodies with the quantity consistent with that of the support steel pipes 13 in the corresponding temporary buttress 6, steel pipe pile reinforcing steel 35 is horizontally connected between the pile bodies, the upper ends of the pile bodies in the steel pipe piles 5 are fixedly connected with the lower ends of the support steel pipes 13 in a one-to-one correspondence mode through flange plates 33, and stiffening plates 34 are welded at the flange connection positions.
In each temporary buttress 6, support steel channels 14 are horizontally connected between support steel pipes 13, and support angle steels 15 are obliquely connected to form a three-dimensional lattice column.
Each tie bar 25 is provided at the top with a recess, the cross member 26 is snapped and fixed in the corresponding recess at the top of each tie bar 25, and a high-strength bolt 31 is provided in the recess of the tie bar 25 to fix the snapped portion of the cross member 26.
The utility model discloses in, the longitudinal bridge is all laid by a pair of passageway channel-section steel 28 separately to construction passageway 44, cross bridge to construction passageway 43 and is constituted, and fixed connection is in the support steel pipe 13 that corresponds the position respectively at passageway channel-section steel 28 both ends, is connected with a plurality of enhancement angle steel 46 between two passageway channel-section steel 28, lays respectively on a plurality of enhancement angle steel and is fixed with plank 47, and 28 top pterygoid lamina of every passageway channel-section steel still are fixed with guardrail 32 respectively, set up safety filter screen 29 in the guardrail 32.
And reinforcing steel bar hanging cages 20 are respectively fixed on two sides of the arch rib top plate 52 above the mid-span lower chord 11 between every two adjacent gusset plates 48, each reinforcing steel bar hanging cage 20 is formed by welding reinforcing steel bars, the upper parts of the reinforcing steel bar hanging cages 20 are fixed on the corresponding sides of the arch rib top plate 52 in an overlapping manner, and wood springboards 45 are arranged between the lower parts of the reinforcing steel bar hanging cages 20 on two sides.
In the utility model, the temporary buttress 6 adopts a lattice column form, and the temporary buttress 6 and the steel pipe pile 5 adopt flanges for reinforced connection; an H beam 24 is welded at the top of the temporary buttress 6, a leveling steel pipe 21 is arranged at the top of the H beam 24, and the leveling steel pipe 21 is welded with an upper flange plate of the H beam 24; the leveling steel pipe 21 is matched with a jack 22 to support a tie rod 25; the movable longitudinal beams 27 are uniformly arranged above the top longitudinal bridge of the H-shaped cross beam 24, the cross beam 26 is supported on the movable longitudinal beams 27, the end part of the cross beam 26 is inserted into the tie rod 25, and a high-strength bolt 31 is arranged for reinforcing connection.
In the utility model, the side part of each group of temporary buttresses 6 is provided with a bracket ladder 16, and the well ladder 18 is only arranged outside the outermost group of temporary buttresses 6 and is connected with a bracket steel pipe 13 through a connecting channel steel 17; the tic-tac-toe ladder 18 comprises steel pipe columns 36, a jig frame 37, anti-falling nets 38, steps 39, a rest platform 40, platform cross beams 41, guardrails 42 and the like, wherein the anti-falling nets are distributed on four sides of the tic-tac-toe ladder 18, so that the up-and-down operation safety of constructors is guaranteed.
In the utility model, a transverse bridge direction construction channel 43 and a longitudinal bridge direction construction channel 44 are erected between the temporary buttresses 6, and safe green nets 29 are arranged on both sides of the channels; a construction channel is arranged at the top of the mid-span lower chord 11, and guardrail nets 49 are arranged on two sides of the construction channel; and the construction platform is formed by arranging a steel bar hanging cage 20 and a wood springboard 45 at the bolting positions of the middle-span lower chord 11, the vertical rods 10, the inclined web members 9 and other members.
In the utility model, the temporary buttress 6 is a single three-dimensional lattice column which is mainly formed by welding a bracket steel pipe 13 through a support channel steel 14 and a support angle steel 15; the top of the steel pipe pile 5 is welded with a flange plate 33, the upper part of the flange plate 33 is welded with a support steel pipe 13, the welding part of the steel pipe pile 5, the support steel pipe 13 and the flange plate 33 is reinforced by a stiffening plate 34, and steel pipe pile reinforcing steel 35 is welded among the steel pipe piles 5 for reinforced connection.
In the utility model, H beam connecting steel 30 is arranged between the transverse direction of the H beam 24 for strengthening connection; the height of the leveling steel pipes 21 is not larger than 500mm, a 32t hydraulic jack 22 is arranged beside each leveling steel pipe 21, and the leveling steel pipes 21 and the jacks 22 together accurately adjust the elevation of the tie rod 25.
In the utility model, the support ladder 16 is formed by welding phi 12 steel bars and a support steel pipe 13; the steel tube upright columns 36, the jig frame 37 and the platform cross beam 41 jointly form a support framework of the T-shaped ladder 18, a pattern plate is welded on the jig frame 37 to serve as a step 39, a steel tube is welded to serve as a guardrail 42, and the platform cross beam 41 is welded at the end part of the jig frame 37; and a steel plate is welded on the platform cross beam 41 to serve as a rest platform 40, and anti-falling nets 38 are arranged around the steel pipe upright posts 36 to protect the safety of workers.
In the utility model, the construction channel adopts channel steel 28 and reinforced angle steel 46 to be welded into a standard sheet body, and the standard sheet body is directly erected between the temporary buttresses 6 on site and is welded and fixed; a wood board 47 is laid above the channel steel 28, and safety green net guardrails 32 are arranged on two sides of the channel steel 28; the bottom of the mid-span lower chord 11 is provided with an arch rib bottom plate 19, two sides of the mid-span lower chord are provided with arch rib webs 53, and the top of the mid-span lower chord is provided with an arch rib top plate 52; and a steel plate 51 is laid on the upper part of the arch rib top plate 52, horizontal guardrail steel bars 50 are arranged on two sides of the upper part of the steel plate 51, and guardrail nets 49 are bound on the guardrail steel bars 50.
The utility model discloses in, cage 20 is hung to the reinforcing bar adopts the preparation of 16 reinforcing bars of phi, and cage 20 upper portion overlap joint in arch rib roof 52 is hung to the reinforcing bar, and cage 20 lower part is hung to the reinforcing bar sets up wooden springboard 45 and connects into the passageway, constitutes construction platform and temporary channel and supplies constructor to be under construction and the walking.
A construction method of a steel truss arch bridge comprises the following steps:
(1) construction preparation: according to a steel truss arch bridge construction design drawing, positions of a main pier 1, a side span buttress 2, a mid-span tie rod 3, a side span tie rod 4, a steel pipe pile 5 and the like are measured and set off in combination with hydrological and geological conditions at a bridge position; completing relevant factory material detection and installation and debugging work of various hoisting equipment;
(2) pier stud and steel pipe pile construction: pouring the side span buttress 2 and the main pier 1 according to the designed size and position, and repeatedly measuring the plane position and pier top elevation of each pier to complete the pier top arrangement of each pier; driving the steel pipe piles 5 into the designated positions by adopting a pile driver according to the design requirements, and retesting whether the top surfaces of the steel pipe piles 5 in the row are at the same elevation by using a total station;
(3) and (3) installing a temporary buttress: welding a flange plate 33 on the top surface of the steel pipe pile 5, hoisting the support steel pipes 13 on the flange plate 33 for welding, arranging stiffening plates 34 for reinforced connection, and welding support channel steel 14 and support angle steel 15 between the support steel pipes 13 to form a single three-dimensional lattice column;
(4) mounting an H beam and a leveling steel pipe: h cross beams 24 with the size of 600 multiplied by 300 multiplied by 11 multiplied by 18 are welded at the tops of the support steel pipes 13, and H beam connecting steel 30 is adopted for connecting the H cross beams 24 in the transverse bridge direction; setting a phi 273mm multiplied by 8mm leveling steel pipe 21 at the top of an H cross beam 24, welding the leveling steel pipe 21 and an upper flange plate of the H cross beam 24, wherein the height of the leveling steel pipe 21 is not more than 500mm, arranging a 32t hydraulic jack 22 beside each leveling steel pipe 21, and accurately adjusting the elevation of a rod piece;
(5) construction of a support ladder and a cross ladder: a phi 12 steel bar is welded with a support steel pipe 13 to form a support ladder 16, a group of cross-shaped ladders 18 are respectively arranged on the north and south sides of a steel truss arch, and a connecting channel steel 17 is welded between each cross-shaped ladder 18 and the support steel pipe 13; the cross ladder 18 adopts a steel tube upright post 36, a jig frame 37 and a platform cross beam 41 to jointly form a support framework, a checkered plate is welded on the jig frame 37 to serve as a step 39, a steel tube is welded to serve as a guardrail 42, the platform cross beam 41 is welded at the end part of the jig frame 37, a steel plate is welded on the platform cross beam 41 to serve as a rest platform 40, and anti-falling nets 38 are arranged around the steel tube upright post 36 to protect the safety of workers;
(6) arranging longitudinal and transverse bridge construction channels: erecting a transverse bridge direction construction channel 43 and a longitudinal bridge direction construction channel 44 between temporary buttresses 6, welding the construction channels into 600 x 9000mm standard sheet bodies by adopting [14a channel steel 28 and angle 75 reinforced angle steel 46, directly erecting and welding and fixing between the temporary buttresses 6 on site, paving a wood plate 47 above the channel steel 28, adopting steel pipes with the specification of phi 30 x 1.5 x 1200mm as guardrail upright columns on two sides of the wood plate 47, and arranging a safety green net on the guardrail upright columns;
(7) hoisting the side span lower chord and the side span tie rod: hoisting a support rod piece on the top of the main pier 1, locking the support in the process, and sequentially hoisting the side span lower chord 7 and the side span tie rod 4 by adopting 2 120-ton truck cranes, wherein the hoisting sequence sequentially advances from the main pier 1 to the side span pier 2;
(8) hoisting the side span beam and the bridge deck unit piece: after the side span lower chord 7 and the side span tie rod 4 are hoisted, 2 120-ton truck cranes are adopted to hoist the side span beam and the bridge deck unit element in sequence, and the hoisting sequence advances from the side span buttress 2 to the main pier 1 in sequence;
(9) hoisting a midspan tie rod, a cross beam and a bridge deck unit piece: after the side-span bridge deck unit element is laid, 2 100-ton truck cranes are adopted to sequentially hoist the mid-span tie bar 3, the hoisting sequence advances from the main pier 1 to the mid-span direction in sequence, and the tie bar 25 is directly hoisted on the leveling steel pipe 21; after the tie bars 25 are hung and installed without errors, the movable longitudinal beams 27 are arranged at the upper parts of the H-shaped cross beams 24; after the movable longitudinal beams 27 are arranged, the truck crane hoisting cross beams 26 are supported on the movable longitudinal beams 27, the end parts of the cross beams 26 are inserted into the tie bars 25, and high-strength bolts 31 are arranged for reinforcing connection; after the beam 26 is installed, the bridge deck 23 is hoisted in sequence;
(10) mid-span tie rod, cross beam, deck slab unit piece closure: the hoisting sequence of the tie bars 25, the cross beams 26 and the bridge deck plates 23 is from two sides to the middle, the tie bars 25 are welded at the closure positions, the sizes and the positions of the bridge deck plates 23 on two sides of the span center line are rechecked, and the connection is strengthened;
(11) hoisting a suspender and a mid-span lower chord: after closure of the bridge deck 23 is finished, 2 50-ton truck cranes are adopted to sequentially hoist the suspender 12 and the mid-span lower chord 11, and the hoisting sequence sequentially advances from the main pier 1 to the mid-span direction;
(12) installing a lower chord construction channel: after the mid-span lower chord 11 is installed, an arch rib bottom plate 19 is welded at the bottom of the mid-span lower chord 11, arch rib webs 53 are welded at two sides, an arch rib top plate 52 is welded at the top, a steel plate 51 is laid at the upper part of the arch rib top plate 52, horizontal guardrail steel bars 50 are welded at two sides of the upper part of the steel plate 51, a guardrail net 49 is bound on the guardrail steel bars 50, and a construction channel at the top of the mid-span lower chord 11 is formed for workers to operate related members;
(13) welding a steel bar hanging cage: after the construction channel of the mid-span lower chord is arranged, a phi 16 steel bar is adopted at the bolting position of the member bars such as the mid-span lower chord 11, the vertical bars 10, the diagonal web members 9 and the like to manufacture the steel bar hanging cage 20, the upper part of the steel bar hanging cage 20 is lapped on the arch rib top plate 52, and the lower part of the steel bar hanging cage 20 is provided with a wood springboard 45 to connect into a channel for construction and walking of construction workers;
(14) hoisting the inclined web members and the vertical rods: after the auxiliary construction platforms such as a lower chord construction channel, a steel bar hanging cage and the like are installed, 2 50-ton truck cranes are adopted to sequentially hoist the diagonal web members 9 and the vertical bars 10, the diagonal web members 9 and the vertical bars 10 are constructed by adopting an inverted insertion method, and the node plates 48 are adopted at the bolting positions to be in reinforced connection with the mid-span lower chord 11;
(15) hoisting the mid-span upper chord: sequentially hoisting a mid-span upper chord 8 by adopting 2 50-ton truck cranes, constructing the mid-span upper chord 8 by adopting an inverted insertion method, reinforcing the bolting positions of the mid-span upper chord 8, the vertical rods 10 and the inclined web members 9 by adopting node plates 48, and arranging a plurality of rows of high-strength bolts 31;
(16) closing the arch frame: the suspender 12, the mid-span lower chord 11, the diagonal web members 9, the vertical bar 10 and the mid-span upper chord 8 are sequentially installed from two sides to the mid-span, before the closing of each rod piece, the plane position deviation of the end parts of the mid-span lower chord 11 and the mid-span upper chord 8 is monitored section by section, when the deviation is large, a 10t hoist is adopted for cross-pull, the plane positions of the end parts of the mid-span lower chord 11 and the mid-span upper chord 8 are adjusted in time, and therefore smooth closing of the steel truss arch is guaranteed, and plane dislocation deviation is prevented;
(17) dismantling the temporary buttress: after the installation of a single steel truss arch is finished, parallel connection and transverse connection installation construction between the side steel truss arch and the middle steel truss arch is carried out, after the full-bridge steel truss arch is completely welded and bolted, a jack 22, a leveling steel pipe 21 and an H-shaped cross beam 24 between the temporary buttress 6 and the steel truss arch are sequentially unloaded from the midspan to two sides, the temporary buttress 6 is sequentially lifted off by using a truck crane, finally a crane hooks the supporting channel steel 14 of the temporary buttress 6, the temporary buttress 6 is slowly translated out, and then the temporary buttress 6 is obliquely and slowly placed on the ground.
The embodiments of the present invention are only descriptions of the preferred embodiments of the present invention, not right the present invention is designed and limited, without departing from the design concept of the present invention, the technical personnel in the field should fall into the protection scope of the present invention for various modifications and improvements made by the technical solution of the present invention, and the technical contents of the present invention are all recorded in the claims.
Claims (5)
1. The utility model provides a steel truss arch bridge, is close to the main mound on vertical both sides including standing in aqueous, and the aquatic that is located between main mound and the corresponding side bank still respectively erects to being provided with the side span buttress, is located the steel-pipe pile that the aquatic was found to being provided with a plurality of violently indulges ranks and distributes between the side span buttress, is connected with the midspan tie rod between each steel-pipe pile, and main mound is connected its characterized in that through side span lower chord and a steel-pipe pile that is close to corresponding this main mound of side bank next-door neighbour: each steel pipe pile is respectively connected with a temporary buttress, each temporary buttress is in a lattice column form formed by a plurality of vertical support steel pipes, the lower end of each support steel pipe is respectively fixed at the upper end of the corresponding steel pipe pile, the upper end of each support steel pipe in each transverse temporary buttress is jointly supported and fixed with an H-beam pair, the H-beam pair is formed by a pair of H-beams, a plurality of H-beam connecting steels are connected between the two H-beams in each H-beam pair, the H-beam pair transversely spans on water, the top positions of the two H-beams corresponding to each temporary buttress are respectively and fixedly provided with a support structure formed by a leveling steel pipe and a jack, each support structure is jointly supported and fixed with a tie rod by the leveling steel pipe and the jack top, the tops of all the H-beam pairs are also jointly supported and fixed with a plurality of movable longitudinal beams extending along the longitudinal direction, the movable longitudinal beams are correspondingly positioned between the adjacent two longitudinal support structures one, the tops of all the movable longitudinal beams are matched with and supported and fixed with a plurality of cross beams, the cross beams are parallel to H cross beam pairs in a one-to-one correspondence mode, tie bars at the tops of all the H cross beam pairs are supported and fixed to the corresponding cross beams respectively, notches are formed in the tops of the tie bars, the cross beams are clamped and fixed in the notches at the tops of the corresponding tie bars, high-strength bolts are arranged in the notches of the tie bars to fix clamped parts of the cross beams, and bridge decks are laid at the tops of the;
a support crawling ladder is arranged on one side inside each temporary buttress respectively and is fixed on a support steel pipe in the corresponding direction; a longitudinal direction construction channel is erected between the adjacent longitudinal temporary buttresses, a transverse direction construction channel is erected between the adjacent transverse temporary buttresses, and the end parts of the longitudinal direction construction channel and the transverse direction construction channel are fixed on the support steel pipes of the temporary buttresses in the corresponding directions;
each temporary buttress close to the river bank on one side is provided with a # -shaped ladder on one side facing the corresponding river bank on the corresponding side, each # -shaped ladder is composed of a plurality of steel pipe stand columns, a jig frame which is connected between the steel pipe stand columns and bent upwards, pedals and rest platforms which are laid in the jig frame, and a protective net which is arranged between the adjacent steel pipe stand columns, and the steel pipe stand column of each # -shaped ladder is connected with a support steel pipe in the corresponding temporary buttress through a connecting channel steel;
the bridge deck is characterized in that a mid-span lower chord and a mid-span upper chord positioned above the mid-span lower chord are longitudinally spanned above the side edges of the bridge deck, two ends of the mid-span lower chord are respectively fixed to main piers on corresponding sides, two ends of the mid-span upper chord are respectively fixedly connected to side-span buttresses on corresponding sides through side-span tie rods, a plurality of vertical rods are connected between the mid-span upper chord and the mid-span lower chord, a plurality of suspension rods are fixedly connected to a cross beam upwards, the suspension rods are fixedly connected to the connecting positions of the lower ends of the vertical rods on the mid-span lower chord in a one-to-one correspondence manner, diagonal web members are respectively connected between the connecting position of each vertical rod and the mid-span upper chord and the connecting position of the vertical rod and the mid-span lower;
the bottom of the mid-span lower chord between adjacent gusset plates is respectively fixed with an arch rib bottom plate, two sides of the arch rib bottom plate are respectively upwards connected with an arch rib web, an arch rib top plate is connected between the tops of the arch rib webs, the mid-span lower chord at the corresponding position is surrounded by the arch rib bottom plate, the arch rib web and the arch rib top plate, a steel plate is laid and fixed above the arch rib top plate, guardrail reinforcing steel bars are fixed on two sides of the upper part of the steel plate, and guardrail nets are bound on the guardrail reinforcing steel bars.
2. A steel truss arch bridge as defined in claim 1, wherein: each steel pipe pile is composed of a plurality of pile bodies with the quantity consistent with that of support steel pipes in corresponding temporary buttresses, steel pipe pile reinforcing steel is horizontally connected between the pile bodies, the upper ends of the pile bodies in the steel pipe piles are fixedly connected with the lower ends of the support steel pipes in a one-to-one correspondence mode through flange plates, and stiffening plates are welded at the positions of the flange connections.
3. A steel truss arch bridge as defined in claim 1, wherein: the longitudinal bridge is laid by a pair of channel steel separately to construction channel, horizontal bridge to construction channel and is constituted, and channel steel both ends difference fixed connection is in the support steel pipe that corresponds the position, is connected with a plurality of angle irons of strengthening between the two channel steel, lays respectively on a plurality of angle irons of strengthening and is fixed with the plank, and every channel steel top pterygoid lamina still is fixed with the guardrail respectively, sets up safe filter screen in the guardrail.
4. A steel truss arch bridge as defined in claim 1, wherein: the bed-jig in every # -shaped ladder corresponds the footboard both sides position and is fixed with the guardrail respectively, and the rest platform in the # -shaped ladder comprises a plurality of platform crossbeams that weld in the bed-jig.
5. A steel truss arch bridge as defined in claim 1, wherein: and reinforcing steel bar hanging cages are respectively fixed on two sides of the arch rib top plate above the mid-span lower chord between every two adjacent gusset plates, the reinforcing steel bar hanging cages are formed by welding reinforcing steel bars, the upper parts of the reinforcing steel bar hanging cages are fixed on the corresponding sides of the arch rib top plate in an overlapping manner, and wood springboards are arranged between the lower parts of the reinforcing steel bar hanging cages on two sides.
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| CN202021083128.6U CN212925728U (en) | 2020-06-12 | 2020-06-12 | Steel truss arch bridge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114922045A (en) * | 2022-05-27 | 2022-08-19 | 中铁大桥局第七工程有限公司 | Optimize steel bridge main truss structure of driving comfort level |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114922045A (en) * | 2022-05-27 | 2022-08-19 | 中铁大桥局第七工程有限公司 | Optimize steel bridge main truss structure of driving comfort level |
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