CN109653076B - Combined type flood control flood gate first bailey steel bridge and construction method - Google Patents

Combined type flood control flood gate first bailey steel bridge and construction method Download PDF

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Publication number
CN109653076B
CN109653076B CN201811582481.6A CN201811582481A CN109653076B CN 109653076 B CN109653076 B CN 109653076B CN 201811582481 A CN201811582481 A CN 201811582481A CN 109653076 B CN109653076 B CN 109653076B
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bailey
steel bridge
bailey steel
chord
flood
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CN109653076A (en
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蔡贤俊
杨帆
王大华
张岱瑛
徐勇
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Sichuan Ganghang Construction Engineering Co ltd
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Sichuan Ganghang Construction Engineering Co ltd
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D6/00Truss-type bridges
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges
    • E01D21/10Cantilevered erection

Abstract

The invention discloses a combined type flood control flood gate first bailey steel bridge and a construction method thereof, wherein the combined type flood control flood gate first bailey steel bridge comprises the following steps: the brake head bailey steel bridge assembly adopts a reinforcing chord member, an upper reinforcing chord member and a bottom reinforcing diagonal chord member to locally reinforce the connecting part of the bailey pieces; the suspension pushing method erection system adopts an adjustable flat roller and a bowl buckle type limiting frame which are provided with limiting plates to prevent the lateral movement, derailment and overturning of the bailey steel bridge; the combined flood control and flood fighting system adopts embedded bolts and turnbuckles to tighten the bailey steel bridge; the adjustable rock-roll supporting guide beam with the limiting plate is adopted in the suspension-pulling dismantling system, the overall stability of the bailey steel bridge and the safety of the bailey steel bridge to the surrounding environment are improved by the construction method, the shearing strength of the bailey steel bridge node is high, the bearing capacity is high, the anti-overturning performance in the suspension-pushing erecting and suspension-pulling dismantling processes and the anti-scouring performance during flood control are improved, the quality and the safety and the stability of the bailey steel bridge are guaranteed, and the adjustable rock-roll supporting guide beam can obtain better technical and economic benefits when applied to actual engineering.

Description

Combined type flood control flood gate first bailey steel bridge and construction method
Technical Field
The invention relates to the field of bridge construction, in particular to a combined type flood control flood gate first bailey steel bridge and a construction method.
Background
With the development of the hydropower construction cause in China, the hydropower cascade development of most rivers extends to the upstream, the engineering sites are mostly located in mountainous areas with complex terrain and inconvenient traffic, and the approach roads serving for main engineering also cross rivers with torrential water flow. In some ship lock reconstruction and extension projects, in order to facilitate vehicle passing and improve construction efficiency, a bailey bridge needs to be arranged at the head of the lock to connect the left bank and the right bank of the ship lock, so that construction roads can be extended to each construction operation surface.
At present, the conventional Bailey bridge installation technology mainly adopts a suspension pushing method, namely, a nose frame is arranged at the front end of a main bridge and is firstly erected on an opposite-bank pier, and then the main bridge is gradually pulled to a position, and the steps of generally placing rollers, assembling the nose frame, assembling bridge sections, pushing the bridge, removing the nose frame, dropping the bridge, paving a bridge deck and the like are included. In the suspension pushing process, if the stabilizing moment is smaller than the overturning moment, the back of the Bailey bridge truss needs to be balanced. On the contrary, the conventional beret bridge dismantling technology mainly adopts a suspension pulling method, namely, the gradual dismantling is carried out according to the reverse order of the suspension pushing method, and generally comprises the steps of dismantling a bridge deck, lifting a bridge by using a jack, placing a roller, installing a nose frame, withdrawing the bridge, dismantling a bridge section, dismantling the nose frame and the like. However, no matter the installation method is the suspension pushing method or the suspension pulling method is adopted to dismantle the beret bridge, because the dead weight of the beret bridge is large, the potential risk of overturning exists, and therefore further improvement on the prior art is needed to improve the overturning resistance of the beret bridge or reduce the risk level of overturning accidents. In addition, for the bailey bridge construction in the ship lock reconstruction and expansion project, the risk factor of flood scouring needs to be considered, and certain reinforcing measures need to be taken for the bailey bridge during flood control.
Disclosure of Invention
The invention aims to provide a construction method of a combined type flood control flood gate head bailey steel bridge, which has the characteristics of reasonable structure, high joint connection strength, stable suspension and push erection, strong flood resistance flushing capability, convenience and high efficiency in suspension pulling and dismantling, high safety coefficient and the like, and the constructed combined type flood control flood gate head bailey steel bridge.
In order to achieve any one of the above purposes, the invention provides a construction method of a combined type flood control flood gate first bailey steel bridge, which comprises the following steps:
step one, assembling the Bailey steel bridge:
adopt first bailey steel bridge structure of floodgate to assemble bailey steel bridge:
the male head of the first Bailey sheet and the female head of the second Bailey sheet are matched and butted, and the first Bailey sheet and the second Bailey sheet are connected by a lower reinforcing chord and an upper reinforcing chord; after the central screw holes of the lower reinforcing chord and the upper reinforcing chord are aligned with the male head and the female head, and the screw holes at two ends are aligned with the bolt holes of the lower chord and the bolt holes of the upper chord, the central screw holes and the screw holes at two ends are fastened by bolts in sequence; then, obliquely overlapping and fastening a bottom reinforcing oblique chord at the lower chord of the first Bailey piece and the second Bailey piece, crossing the lower chord and the bottom reinforcing oblique chord, and then fastening a cross beam with the first Bailey piece and the second Bailey piece, and repeating the steps until the integral assembly of the Bailey steel bridge is completed;
step two, erecting a Bailey steel bridge by a suspension pushing method:
a bailey steel bridge is erected by adopting a suspension-pushing method erection system in a suspension-pushing manner:
two integral anchor plates are embedded in parallel on one side of the left bank of the gate head, a plurality of adjustable flat rollers are uniformly arranged on the inner sides of the integral anchor plates along the longitudinal direction, after the distance between the flat roller sliding bases is adjusted to be consistent with the width of the Bailey steel bridge, the flat rollers are fastened by bolts, and the flat roller wheels are arranged on the flat roller sliding bases;
erecting a Bailey steel bridge on the flat rolling roller, mounting a bowl buckle type limiting frame, and pushing and erecting the front end of the Bailey steel bridge under the traction of a winch on the right bank of the brake head;
step three, establishing a flood control and flood fighting system:
the method comprises the following steps of establishing a flood control system by utilizing the bailey steel bridge combined type flood control system:
two integral anchor plates are respectively embedded in parallel on two banks of the gate head, embedded bolts are arranged at the upstream positions of the two banks of the gate head,
during flood control, connecting the embedded bolts and the lower chord of the bailey steel bridge through steel wire ropes, and tensioning the steel wire ropes;
before flooding the bridge body with flood, mounting a bowl buckle type limiting frame to be fixedly connected with the integral anchor plate, removing part of the bridge deck, and stopping using the Bailey steel bridge;
step four, dismantling the bailey steel bridge by a suspension method:
dismantling the bailey steel bridge by adopting a bailey steel bridge suspension method:
a plurality of adjustable flat rolls are uniformly arranged on the inner side of the integral anchor plate along the longitudinal direction on one side of the left bank of the gate head; a plurality of adjustable rock rolls are uniformly arranged on the right bank of the brake head along the longitudinal direction, and a guide beam is obliquely connected to the front end of the bailey steel bridge and placed on the adjustable rock rolls;
after the adjustable rock roll distance is adjusted to be consistent with the width of the guide beam, the adjustable rock roll distance is fastened by bolts; dismantling the bridge deck and the base, placing the bailey steel bridge on one side of the left bank of the brake head on the adjustable flat roller, and then installing the bowl buckle type limiting frame; the bailey steel bridge is hung under the traction of a winch on the left bank of the brake head, and the bailey steel bridge is dismantled section by section; and finally, sequentially detaching the bowl buckle type limiting frame, the adjustable flat roller and the adjustable rocking roller.
According to another invention, the invention provides the composite flood control flood gate bow bailey steel bridge obtained by the construction method.
Compared with the prior art, the invention has the following beneficial effects:
(1) the components of the invention are mainly prefabricated steel trusses, are produced in a factory standard mode, have guaranteed quality, can be quickly installed and disassembled on a construction site at the head of a brake, and meet the requirement of traffic.
(2) The invention adopts the lower reinforcing chord and the upper reinforcing chord to locally reinforce the male and female head connecting part of the Bailey sheet, has high embedding degree, does not influence the whole structure, has high node shear strength and improves the bearing capacity.
(3) According to the invention, the lower chord of the Bailey sheet is lapped by the bottom reinforcing oblique chord, so that the bearing capacity of the Bailey bridge can be enhanced, and the anti-overturning performance in the erection process can be improved.
(4) The suspension-push erection and suspension-pull dismantling system adopts the adjustable flat roll and the adjustable rock roll to support the Bailey steel bridge, has strong applicability, and the limiting plate and the bowl buckle type limiting frame can avoid derailment, overturning and falling of the Bailey steel bridge in the suspension-push process, thereby realizing stable erection.
(5) According to the flood control system, the bailey steel bridge is tensioned in a mode that bolts are embedded in the two banks of the lock head, and the anti-scouring capacity of the bailey steel bridge is improved by changing the stress system of the bridge body.
Drawings
Fig. 1 is a longitudinal sectional view of a unit bailey steel bridge of a steel truss assembled bow bailey steel bridge according to an embodiment of the present invention before assembly.
Fig. 2 is a longitudinal sectional view of a unit bailey steel bridge of a steel truss assembled bow bailey steel bridge according to an embodiment of the present invention after assembly.
Fig. 3 is a longitudinal view of a brake head bailey steel bridge according to an embodiment of the present invention.
Fig. 4 is a longitudinal schematic view of a suspension-pushing erection system of a brake head bailey steel bridge according to an embodiment of the invention.
Fig. 5 is a schematic lateral view of a suspension-pushing erection system of a brake head bailey steel bridge according to an embodiment of the invention.
Fig. 6 is a top view of a composite flood control system of a brake head bailey steel bridge according to an embodiment of the present invention.
Fig. 7 is a transverse schematic view of a combined flood control system of the brake head bailey steel bridge according to an embodiment of the invention.
Fig. 8 is a longitudinal schematic view of a suspension-pull demolition system of a brake bow bailey steel bridge according to an embodiment of the present invention.
Fig. 9 is a partially enlarged schematic view of a suspension-pull demolition system of a brake bow bailey steel bridge according to an embodiment of the present invention.
In the figure: 1-a first beret; 2-a second bailey piece; 3-lower reinforcing chord; 4-upper reinforcing chord; 5-reinforcing oblique chord at the bottom; 6-a cross beam; 7-a bridge deck; 8-male head; 9-female head; 10-lower chord; 11-upper chord; 12-lower chord bolt holes; 13-upper chord bolt hole; 14-a bolt; 15-a base; 16-bailey steel bridges; 17-gate head left bank; 18-adjustable flat roll; 19-bowl buckle type limiting frame; 20-integral anchor plate; 21-gate head right bank; 22-a winch; 23-a flat rolling bottom plate; 24-a flat rolling sliding base; 25-a flat rolling roller; 26-a backing plate; 27-a steel cord; 28-embedding bolts; 29-turnbuckle; 30-a guide beam; 31-adjustable rock; 32-rock floor; 33-rocking the sliding base; 34-rock roller; 36-limiting plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.
It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.
The invention provides a composite flood control flood gate Toberet steel bridge and a construction method thereof, wherein the construction method comprises the following steps,
step 1: assembling the Bailey steel bridge:
adopt first bailey steel bridge structure of floodgate to assemble bailey steel bridge:
as shown in fig. 1 to 3, a male head (8) of a first bailey piece (1) and a female head (9) of a second bailey piece (2) are in butt joint in a matching manner, and a lower reinforcing chord (3) and an upper reinforcing chord (4) are sequentially embedded into grooves of a lower chord (10) and an upper chord (11) on the first bailey piece (1) and the second bailey piece (2);
after central screw holes in the lower reinforcing chord (3) and the upper reinforcing chord (4) are ensured to be aligned with the male head (8) and the female head (9) and screw holes at two ends are aligned with the lower chord bolt hole (12) and the upper chord bolt hole (13), the central screw holes and the screw holes at two ends are fastened by bolts (14) in sequence;
and then, obliquely overlapping and fastening the bottom reinforcing oblique chord (5) with the lower chord (10) of the first Bailey piece (1) and the second Bailey piece (2), fastening the cross beam (6) with the Bailey pieces after crossing the lower chord (11) and the bottom reinforcing oblique chord (5), and repeating the steps until the integral assembly of the Bailey steel bridge (16) is completed.
2) Erecting a Bailey steel bridge by a suspension pushing method:
a bailey steel bridge is erected by adopting a suspension-pushing method erection system in a suspension-pushing manner:
as shown in fig. 4-5, two integrated anchor plates (20) are embedded in parallel on one side of a left bank (17) of a brake head, a plurality of adjustable flat rollers (18) are uniformly arranged on the inner side of the integrated anchor plates (20) along the longitudinal direction, after the distance between the left and right flat roller sliding bases (24) is adjusted along a groove (35) to be consistent with the width of a bailey steel bridge (16), the flat roller sliding bases (24) are fastened by bolts (14), and flat roller wheels (25) are arranged on the flat roller sliding bases (24).
The bailey steel bridge is erected (16) and placed on a flat rolling roller (25), a bowl buckling type limiting frame (19) is installed, wherein the bowl buckling type limiting frame (19) stretches across the bailey steel bridge (16) and is fixedly connected with an integral anchor plate (5) pre-buried on the ground surface, the front end of the bailey steel bridge (16) is connected with a winch (22) of a right bank (21) of a brake head through a steel wire rope (27), and the bailey steel bridge is erected under the traction of the winch (22) in a pushing mode.
When the front end of the Bailey steel bridge (16) is close to the right bank (21) of the brake head, if the front end of the Bailey steel bridge (16) is lower than the base (15), the height of a base plate (26) of a winch (22) can be adjusted in a matched mode, after the Bailey steel bridge is accurately landed on the base (15), a bridge deck (7) is laid, and finally a steel wire rope (27), a bowl buckle type limiting frame (19) and an adjustable flat roller (18) are sequentially detached.
It is worth mentioning that the gate head right bank (21) and the gate head left bank (17) are relative concepts and do not mean that the adjustable flat roller (18) has to be arranged on the left side.
3) Establishing a flood control and flood fighting system:
the method comprises the following steps of establishing a flood control system by utilizing the bailey steel bridge combined type flood control system:
as shown in fig. 6 to 7, two integrated anchor plates (20) are embedded in parallel in both banks of the gate head (a gate head left bank (17) and a gate head right bank (21)), and embedded bolts (28) are installed at upstream positions of both banks of the gate head.
During flood control, the embedded bolts (28) and the lower chord (10) of the bailey steel bridge (16) are connected through the steel wire ropes (27), and the steel wire ropes (27) are tightened by using turn buckle screws (29).
Before the bridge body is submerged by flood, the bowl-buckled limiting frame (19) is installed to be fixedly connected with the integral anchor plate (20), and part of the bridge deck (7) is detached, so that on one hand, the scouring stress surface of the bridge body is effectively reduced, on the other hand, the buoyancy of the bridge body is reduced, and meanwhile, the use of the Bailey steel bridge (16) is stopped.
4) Dismantling the bailey steel bridge by a suspension pulling method:
dismantling the bailey steel bridge by adopting a bailey steel bridge suspension method:
as shown in fig. 8, a plurality of adjustable flat rollers (18) are uniformly arranged on the inner side of an integral anchor plate (20) along the longitudinal direction on one side of the left bank (17) of the gate head; a plurality of adjustable rock rolls (31) are uniformly arranged on the right bank (21) of the gate head along the longitudinal direction, and after the distance between the left sliding base and the right sliding base (24) is adjusted along the groove (35) to be consistent with the width of the guide beam (30), the left sliding base and the right sliding base are fastened by bolts (14); connecting a guide beam (30) to the front end of the Bailey steel bridge (16) in an inclined manner, and placing the guide beam on an adjustable rock roller (31); the bridge deck (7) and the base (15) are removed, the bailey steel bridge (16) on one side of the left bank (17) of the brake head is placed on the adjustable flat roller (18) in a jack mode and the like, and then the bowl buckle type limiting frame (19) is installed.
The bailey steel bridge (16) is connected with the winch (22) through a steel wire rope (27), and the bridge body is suspended under the traction of the winch (22), so that the bailey steel bridge (16) is dismantled section by section.
And finally, the bowl buckle type limiting frame (19), the adjustable flat roller (18) and the adjustable rocking roller (31) are sequentially detached, so that recycling is realized.
It is worth mentioning that combined type flood prevention flood fighting brake head bailey steel bridge through the brake head bailey steel bridge structure, hang that mention above erects system, combined type flood prevention flood fighting system and hang and draw the method and demolish the concatenation that the system accomplished the steel bridge respectively, erect, the flood prevention sets up and demolish, so that combined type flood prevention flood fighting brake head bailey steel bridge has that node joint strength is high, hang and push to erect steady, flood resistance water-washed ability is strong, the characteristics that convenient high efficiency and factor of safety are demolishd to the overhang.
In step 1), the brake head bailey steel bridge structure includes:
first bailey piece (1), second bailey piece (2), lower reinforcing chord (3), upper reinforcing chord (4), bottom reinforcing diagonal chord (5), crossbeam (6), bridge deck (7) and base (15), wherein first bailey piece (1) with second bailey piece (2) are I-shaped-like structure, lower chord (10) and upper chord (11) including parallel interval setting, first bailey piece (1) with the middle part of lower chord (10) of second bailey piece (2) all is equipped with lower chord bolt hole (12) respectively, first bailey piece (1) with the middle part of upper chord (11) of second bailey piece (2) all is equipped with upper chord bolt hole (13) respectively, first bailey piece (1) with the both ends side of second bailey piece (2) is equipped with anastomotic public head (8) and female head (9), wherein the public head (8) of first bailey piece (1) and female head (2) of second bailey piece (2) Are respectively connected through the lower reinforcing chord (3) and the upper reinforcing chord (4) and are fastened through bolts (14).
The bottom is strengthened down chord (5) and is striden lower chord (10) of connecting first bailey piece (1) and second bailey piece (2) to one side, crossbeam (6) span down chord (10) with bottom is strengthened down chord (5), decking (7) are laid on crossbeam (6), wherein bottom diagonal (5) are set up on down chord (10), crossbeam (6) are set up on bottom is strengthened diagonal (5), assemble finally and form complete bailey steel bridge (16).
A male head (8) close to a lower chord (10) of the first Bailey sheet (1) and a female head (9) close to the lower chord (10) of the second Bailey sheet (2) are connected through the lower reinforcing chord (3); correspondingly, a male head (8) close to the upper chord (11) of the first Bailey sheet (1) and a female head (9) close to the upper chord (11) of the second Bailey sheet (2) are connected through the upper reinforcing chord (4).
The lower reinforcing chord (3) is overlapped and embedded in grooves of lower chords (10) of the first Bailey piece (1) and the second Bailey piece (2), and the upper reinforcing chord (4) is overlapped and embedded in grooves of upper chords (11) of the first Bailey piece (1) and the second Bailey piece (2).
The lower reinforcing chord (3) and the upper reinforcing chord (4) are provided with a central screw hole and an end screw hole, wherein the lower reinforcing chord (3) and the end screw hole in the upper reinforcing chord (4) are aligned to a lower chord bolt hole (12) and an upper chord bolt hole (13), the central screw hole in the lower reinforcing chord (3) and the upper reinforcing chord (4) is aligned to a male head (8) and a female head (9), so that the male head (8) of the first Bailey sheet (1), the female head (9) of the second Bailey sheet (2) and the center of the lower reinforcing chord (3) or the center of the upper reinforcing chord (4) are fastened through the same bolt (14).
In step 2), the suspension-pushing erection system comprises:
the bailey steel bridge comprises a bailey steel bridge (16), an adjustable flat roll (18) arranged on a left brake head bank (17), a bowl buckle type limiting frame (19), an integral anchor plate (20) and a winch (22) arranged on a right brake head bank (21), wherein the bailey steel bridge (16) is arranged on the adjustable flat roll (18), and the winch (22) pulls the front end of the bailey steel bridge (16) through a steel wire rope (27) until the bailey steel bridge (16) falls on a base (15) of the right brake head bank (21).
Adjustable flat roll (18) still include flat roll bottom plate (23), flat roll sliding base (24) and flat roll gyro wheel (25), bailey steel bridge (16) are settled on flat roll gyro wheel (25), flat roll bottom plate (23) of adjustable flat roll (18) set up on first left bank (17) of floodgate, and flat roll sliding base (24) set up on flat roll bottom plate (23), and the flat roll sliding base (24) outside all is equipped with the limiting plate.
The winch (22) is anchored with the base plate, and the height of the base plate is adjustable.
In step 3), the composite flood control system comprises:
bailey steel bridge (16), buried bolt (28) and bowl are buckled spacing (19), buried bolt (28) symmetry sets up at lock head left bank (17) and lock head right bank (21), buried bolt (28) are taut through lower chord (10) of turn buckle screw (29) and wire rope (27) and Bailey steel bridge (16), bowl is buckled spacing (19) and is spaned Bailey steel bridge (16), and the symmetry sets up at lock head left bank (17) and lock head right bank (21). The embedded bolts (28) are symmetrically arranged on the left bank (17) and the right bank (21) of the gate head.
The bailey steel bridge (16) is detachably provided with a bridge deck (7), and the bridge deck (7) can be partially disassembled during flood control.
The bowl buckle type limiting frame (19) is arranged on the base (20).
In step 4), the suspension-pull dismantling system comprises:
the device comprises a Bailey steel bridge (16), a guide beam (30), an adjustable flat roller (18) arranged on the left bank (17) of the brake head, a bowl buckle type limiting frame (19), an integral anchor plate (20), a winch (22) and an adjustable rocking roller (31) arranged on the right bank (21) of the brake head.
The integrated anchor plate (20) is embedded in one side of a gate head left bank (17), the adjustable flat roller (18) is arranged in the inner side of the integrated anchor plate (20), the bailey steel bridge (1) located on one side of the gate head left bank (17) is arranged on the adjustable flat roller (4), the bowl buckle type limiting frame (5) spans the bailey steel bridge (1), the foot of the bowl buckle type limiting frame (19) is fixedly connected with the embedded integrated anchor plate (20) on the ground surface, the winch (22) pulls the rear end of the bailey steel bridge (16) through a steel wire rope (27) until the bailey steel bridge (16) falls on the gate head left bank (17), and the guide beam (30) is connected with the bailey steel bridge (16) on one side of the gate head right bank (21) at a certain inclination angle and is arranged on the adjustable swing roller (31).
Rock with adjustable (31) and roll bottom plate (32), rock sliding base (33) and rock gyro wheel (34) including rocking, rock sliding base (33) movably arrange in rock on the gyro wheel (34), rock gyro wheel (34) and arrange in rock sliding base (33) is last, rock sliding base (33) outside and still be equipped with limiting plate (36).
The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by anyone in the light of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as those of the present application, fall within the protection scope of the present invention.

Claims (10)

1. The construction method of the combined type flood control flood gate first bailey steel bridge is characterized by comprising the following steps of:
step one, assembling the Bailey steel bridge:
adopt first bailey steel bridge structure of floodgate to assemble bailey steel bridge:
a male head (8) of a first Bailey sheet (1) and a female head (9) of a second Bailey sheet (2) are matched and butted, and the first Bailey sheet (1) and the second Bailey sheet (2) are connected by a lower reinforcing chord (3) and an upper reinforcing chord (4);
after the central screw holes of the lower reinforcing chord (3) and the upper reinforcing chord (4) are ensured to be aligned with the male head (8) and the female head (9) and the screw holes at the two ends are aligned with the lower chord bolt hole (12) and the upper chord bolt hole (13), the central screw hole and the screw holes at the two ends are fastened by bolts (14) in sequence;
then, obliquely overlapping and fastening a bottom reinforcing oblique chord (5) with a lower chord (10) of the first Bailey piece (1) and the second Bailey piece (2), fastening a cross beam (6) with the first Bailey piece (1) and the second Bailey piece (2) after crossing the lower chord (11) and the bottom reinforcing oblique chord (5), and repeating the steps until the integral assembly of the Bailey steel bridge (16) is completed;
step two, erecting a Bailey steel bridge by a suspension pushing method:
a bailey steel bridge is erected by adopting a suspension-pushing method erection system in a suspension-pushing manner:
two integral anchor plates (20) are embedded in parallel on one side of a left bank (17) of a gate head, a plurality of adjustable flat rollers (18) are uniformly arranged on the inner side of the integral anchor plates (20) along the longitudinal direction, after the distance between flat roller sliding bases (24) is adjusted to be consistent with the width of a Bailey steel bridge (16), the flat rollers are fastened by bolts (14), and flat roller rollers (25) are arranged on the flat roller sliding bases (24);
erecting a Bailey steel bridge (16) on the flat rolling roller (25), installing a bowl buckle type limiting frame (19), and pulling and pushing the front end of the Bailey steel bridge (16) to erect under the traction of a winch (22) on the right bank (21) of the brake head;
step three, establishing a flood control and flood fighting system:
the method comprises the following steps of establishing a flood control system by utilizing the bailey steel bridge combined type flood control system:
two integrated anchor plates (20) are respectively embedded in parallel at the two banks of the gate head, embedded bolts (28) are installed at the upstream positions of the two banks of the gate head,
during flood control, connecting the embedded bolts (28) with the lower chord (10) of the bailey steel bridge (16) through steel wire ropes (27), and tensioning the steel wire ropes (27);
before flooding the bridge body with flood, mounting a bowl buckle type limiting frame (19) to be fixedly connected with the integral anchor plate (20), removing part of the bridge deck (7), and stopping the use of the Bailey steel bridge (16);
step four, dismantling the bailey steel bridge by a suspension method:
dismantling the bailey steel bridge by adopting a bailey steel bridge suspension method:
a plurality of adjustable flat rollers (18) are uniformly arranged on the inner side of the integral anchor plate (20) along the longitudinal direction on one side of the left bank (17) of the lock head; a plurality of adjustable rock rolls (31) are uniformly arranged on the right bank (21) of the brake head along the longitudinal direction, and a guide beam (30) is obliquely connected to the front end of the bailey steel bridge (16) and is placed on the adjustable rock rolls (31);
after the distance between the adjustable rock rolls (31) is adjusted to be consistent with the width of the guide beam (30), the adjustable rock rolls are fastened by bolts (14); dismantling the bridge deck (7) and the base (15), placing the bailey steel bridge (16) on one side of the left bank (17) of the gate head on the adjustable flat roller (18), and then installing a bowl buckle type limiting frame (19);
the bailey steel bridge (16) is hung under the traction of a winch (22) on the left bank (17) of the brake head, and the bailey steel bridge (16) is dismantled section by section;
and finally, sequentially detaching the bowl buckle type limiting frame (19), the adjustable flat roller (18) and the adjustable rock roller (31).
2. The construction method of the combined type flood control flood gate first bailey steel bridge according to claim 1,
in the step 2, the winch (22) is arranged on a base plate (26), the height of the base plate (26) is adjusted, and a bridge deck (7) is laid after the bailey steel bridge (16) falls to the base (15).
3. The construction method of the composite flood control flood gate bow bailey steel bridge according to claim 1, wherein the bowl buckle type limiting frame (19) spans the bailey steel bridge (16) and is fixedly connected with the integral anchor plate (20) pre-buried on the ground, and the bailey steel bridge (16) is connected with the winch (22) through a steel wire rope (27).
4. The construction method of the combined type flood control flood gate first bailey steel bridge according to claim 1, wherein in the step 3, the steel wire rope (27) is tensioned by a turnbuckle (29).
5. The construction method of the composite flood control flood gate bow bailey steel bridge according to claim 1, wherein in the step 1, the lower reinforcing chord (3) and the upper reinforcing chord (4) are sequentially embedded into grooves of the lower chord (10) and the upper chord (11) of the first bailey piece (1) and the second bailey piece (2).
6. The construction method of the combined flood control flood fighting brake head bailey steel bridge according to claim 1, wherein in the step 1, the middle parts of the lower chords (10) of the brake head bailey steel bridge assembled by the bailey steel bridge structure are respectively provided with the lower chord bolt holes (12), the middle parts of the upper chords (11) are respectively provided with the upper chord bolt holes (13), the lower reinforcing chord (3) and the upper reinforcing chord (4) are respectively provided with the central screw hole and the end screw hole, and the male head (8) of the first bailey piece (1) and the female head (9) of the second bailey piece (2) are fastened with the center of the lower reinforcing chord (3) or the center of the upper reinforcing chord (4) through the same bolt (14).
7. The construction method of the combined type flood control flood gate first bailey steel bridge according to claim 1, wherein in the step 2, the suspension pushing method erection system comprises the following steps: adjustable flat roll (18) including flat roll bottom plate (23), flat roll sliding base (24) and flat roll gyro wheel (25), bailey steel bridge (16) are settled on flat roll gyro wheel (25), flat roll bottom plate (23) set up on floodgate head left bank (17), flat roll sliding base (24) set up on flat roll bottom plate (23), and the outside is equipped with the limiting plate.
8. The construction method of the composite flood control flood fighting brake head bailey steel bridge according to claim 1, wherein in the step 3, in the composite flood control flood fighting system, the bowl buckle type limiting frame (19) spans the bailey steel bridge (16), the bowl buckle type limiting frame (19) and the embedded bolts (28) are symmetrically arranged on a brake head left bank (17) and a brake head right bank (21), and the bridge deck (7) is detachably arranged on the bailey steel bridge (16).
9. The construction method of the combined type flood control flood gate Toberley steel bridge according to claim 1, wherein in the suspension pulling method dismantling system, the adjustable rock (31) comprises a rock bottom plate (32), a rock sliding base (33) and a rock roller (34), the rock sliding base (33) is movably arranged on the rock roller (34), the rock roller (34) is arranged on the rock sliding base (33), and a limiting plate (36) is further arranged on the outer side of the rock sliding base (33).
10. The composite flood control flood gate bow bailey steel bridge is characterized by being obtained by construction according to the construction method of the composite flood control flood gate bow bailey steel bridge claimed in claims 1 to 9.
CN201811582481.6A 2018-12-24 2018-12-24 Combined type flood control flood gate first bailey steel bridge and construction method Active CN109653076B (en)

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