CN111254837A - Construction method for building bridge by bridge crane fishing method - Google Patents
Construction method for building bridge by bridge crane fishing method Download PDFInfo
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- CN111254837A CN111254837A CN202010143492.5A CN202010143492A CN111254837A CN 111254837 A CN111254837 A CN 111254837A CN 202010143492 A CN202010143492 A CN 202010143492A CN 111254837 A CN111254837 A CN 111254837A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/06—Methods or apparatus specially adapted for erecting or assembling bridges by translational movement of the bridge or bridge sections
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/10—Cantilevered erection
- E01D21/105—Balanced cantilevered erection
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
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- General Engineering & Computer Science (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to a construction method for constructing a bridge by a bridge crane fishing method, which utilizes a bridge girder erection machine by a fishing method, auxiliary equipment and facilities and adopts a fishing method construction process to complete the erection construction of a pile foundation, a bearing platform, a pier and the bridge. The front part of the bridge girder erection machine adopting the fishing method adopts a local double-beam mechanism, and is additionally provided with a front auxiliary supporting leg and three traveling cranes, wherein the two traveling cranes are positioned on a single guide beam and are used for hoisting auxiliary equipment facilities such as a drilling machine, a bearing platform template, a pier body template, reinforcing steel bars and the like and transporting construction wastes; the other travelling crane is positioned on the local double beams and used for transversely moving equipment within the range of the bearing platform and longitudinally moving the equipment at a short distance, and the front auxiliary supporting legs can be supported on the ground and are closely matched with the 3 travelling cranes to finish the construction operation of the fishing method. The invention does not set a construction access, reduces the transplanting amount of green plants to the minimum, only transplants in the projection range of the abutment, can more completely keep the original landform, protects the activity space of the wild small animals as much as possible, and is beneficial to furthest keeping the harmony between human and nature.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a construction method for constructing a bridge by a bridge crane fishing method.
Background
The bridge is generally a structure which is erected on rivers, lakes and seas and allows vehicles, pedestrians and the like to smoothly pass through. In order to adapt to the modern high-speed developed traffic industry, bridges are also extended to be constructed to span mountain stream, unfavorable geology or meet other traffic needs, so that the buildings are convenient to pass. The bridge generally comprises an upper structure, a lower structure, a support and an auxiliary structure, wherein the upper structure is also called a bridge span structure and is a main structure for spanning obstacles; the lower structure comprises a bridge abutment, a bridge pier and a foundation; the support is a force transmission device arranged at the supporting positions of the bridge span structure and the bridge pier or the bridge abutment; the auxiliary structures refer to bridge end butt straps, tapered revetments, diversion works and the like.
The bridge girder erection machine is equipment for placing prefabricated beam pieces on a prefabricated bridge pier. The bridge erecting machine belongs to the field of bridge construction, and has the main function of lifting beam pieces, then conveying the beam pieces to a position and then putting the beam pieces down.
There are three kinds of bridge erecting machines which are commonly used in China: single-beam bridge girder erection machine, double-cantilever type bridge girder erection machine and double-beam type bridge girder erection machine.
Single-beam type bridge girder erection machine
One of the bridge construction machines, the boom of which is a box beam, is cantilevered forward and has a foldable prefabricated pier column (composed of left and right legs) at its front end. The machine can automatically drive into a bridge position under the no-load state, and then straightens the front prefabricated pier upright post to support on the front pier. When the erected beam piece (or the whole-hole box beam) moves along the suspension arm, the suspension arm is close to the state of the simply supported beam. When the bridge is built, the machine can automatically drive into the bridge position under the no-load state, the beam piece is firstly transferred from the railway flat car to the special beam transporting car by using the special gantry crane, then the beam transporting car and the rear end of the bridge building machine are aligned, and the beam piece is hoisted by using two beam hoisting cranes running on the suspension arm of the bridge building machine and moves forward along the suspension arm to reach the bridge position to drop the beam. In order to adapt to the curve bridging, the suspension arm of the machine can swing a small amount in the horizontal plane. The beam piece positioning method is the same as that used by a double-cantilever type bridge girder erection machine (beam moving or track shifting). The machine has the advantages that: the balance weight is cancelled, the locomotive is not required to be pushed, the bridge head and the crossing line are not required for beam feeding, the degree of mechanization is improved, and the safety performance is improved to some extent.
Double-cantilever type bridge girder erection machine
The bridge girder erection machine cannot be driven by the self and needs to be pushed by a locomotive. The front arm is used for hanging the beam, the rear arm is used for hanging the balance weight, and the front arm and the rear arm can not swing in the horizontal plane. When bridging, a specially-made 80-ton small flat car is usually used for transporting the beam piece to the position below a lifting hook (called as a 'feeding beam') of the front arm of the bridge girder erection machine for hoisting; in order to facilitate the shunting operation, a branch line is laid at the bridge head. After the bridge girder is hoisted by the bridge girder erection machine, the axle load is increased, and a newly-built embankment at the bridge head is softer, so that reinforcing measures such as pressing a road by a heavy vehicle and additionally inserting a sleeper and the like must be taken for a bridge girder hoisting section of the bridge girder erection machine.
Double-beam bridge girder erection machine
The suspension arm is composed of a left box beam and a right box beam, and the two beams penetrate through the machine body and extend out to the front end and the rear end. And the two ends of the folding prefabricated pier column are respectively provided with two leg rods. Two trussed vehicles are arranged across the two box girders and can longitudinally run along the suspension arm. The hanging beam trolley is arranged on the truss trolley and can transversely run along the truss trolley. The girder piece (or whole girder) to be erected can be directly sent to the lower part of the rear arm of the bridge girder erection machine by using a railway flat car, and after being lifted by using a girder lifting trolley, the girder lifting trolley moves forwards by using a girder lifting trolley, then the girder lifting trolley moves transversely, and then the girder falls into place. The front end and the rear end of the bridge girder erection machine can be used for hanging and dropping the girder; when the direction of the frame beam is changed, the turning is not needed; in order to adapt to the curved frame beam, the front arm and the rear arm can swing in a horizontal plane; the beams can be in place without moving the beams or shifting the tracks during the split erection; the beam feeding device does not need a bridge head branch line or a special beam transporting vehicle.
At present, when a bridge is constructed, a construction access is usually required to be constructed to construct a pile foundation and a bearing platform, the construction access can cause great damage to the environment, and meanwhile, great influence is caused to wild animals and plants under the bridge.
Disclosure of Invention
The invention aims to provide a construction method for constructing a bridge by a bridge crane fishing method, which utilizes a bridge girder erection machine by the fishing method, auxiliary equipment and facilities, adopts the fishing method construction process to finish the erection construction of a pile foundation, a bearing platform, a pier and the bridge, does not need to be provided with a construction access, and can reduce the damage to the environment and the influence of wild animals and plants under the bridge as far as possible.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the construction method for building the bridge by the bridge crane fishing method comprises the following steps;
s1, constructing the first frame section: firstly, completing construction of at least 3-span bridge pile foundations, bearing platforms and piers, erecting a first frame section box girder, and then completing assembly of a cross-line gantry crane, a bridge girder erection machine by a fishing method, a girder transporting vehicle and a logistics vehicle;
the fishing method bridge girder erection machine comprises a front supporting leg, a middle supporting leg, a rear supporting leg, a front hanging beam crane, a rear hanging beam crane, a single guide beam, a crane No. 1, a crane No. 2, a crane No. 3 and a telescopic front auxiliary supporting leg, wherein the front hanging beam crane and the rear hanging beam crane are positioned on the single guide beam, the front auxiliary supporting leg is positioned at the front end of the single guide beam, two longitudinal short beams are respectively arranged on two sides of the front part of the single guide beam, and the short beams are fixedly connected with the single guide beam through cross beams;
the No. 1 travelling crane is installed on the two short beams, the bridge frame of the No. 1 travelling crane can longitudinally run along the rails laid on the two short beams, the crane trolley of the No. 1 travelling crane can transversely run along the rails laid on the bridge frame, and the No. 2 travelling crane and the No. 3 travelling crane are installed on the single guide beam and can longitudinally run between the two short beams along the single guide beam;
the No. 1 traveling crane is arranged on the two short beams, and the No. 2 traveling crane and the No. 3 traveling crane are arranged on the single guide beam;
s2, passing through holes of the fishing bridge girder erection machine, so that the front support legs are supported on the front pier; the front auxiliary supporting leg reaches the front position of the front abutment and is supported on the cleaned ground;
s3, pile foundation construction;
hoisting the drilling machine to the ground position of the front axle platform by using the No. 2 travelling crane and the No. 3 travelling crane;
adjusting and aligning the platform support by using a No. 1 traveling crane, and then starting pile foundation hole drilling construction;
after the pile foundation is formed into a hole, hoisting the pile foundation reinforcement cage into the hole by a fishing method; then, pile foundation concrete pouring and pile foundation curing are carried out;
s4, constructing a bearing platform;
the bridge crane is transported to a bearing platform construction position from the tail part of the bridge crane through a No. 2 travelling crane and a No. 3 travelling crane and is installed in place;
hoisting the bearing platform template and the binding steel bars from the tail part of the bridge girder erection machine to a bearing platform construction position through a No. 2 travelling crane and a No. 3 travelling crane, completing the installation of the bearing platform template and the binding of all the steel bars, and then performing the pouring of the bearing platform and the maintenance of the bearing platform;
s5, construction of piers:
s6, beam:
the middle supporting leg moves forwards for a certain distance and then is supported; the front support legs move forwards to reach the positions of the front bridge rack beams and are supported;
the front hanging beam crane and the rear hanging beam crane hang the box girder to a span of the girder to be erected, and the girder falls in a contraposition manner, so that the span box girder erection is completed;
and returning to the step 2, and entering the next fishing method for circulating construction operation.
Further, the S1 includes the following steps;
s1.1, completing construction of 3-5-span bridge pile foundations, bearing platforms and piers in advance;
s1.2, assembling the cross-line gantry crane;
s1.3, erecting the 3-5 span box girder by using a span gantry crane;
s1.4, assembling the bridge girder erection machine, the girder transporting vehicle and the logistics vehicle by using the cross-line gantry crane.
Further, the S2 includes the following steps;
s2.1, after the construction of the first frame section is finished, opening the front hanging beam travelling crane and the rear hanging beam travelling crane to the position of the middle support leg, and preparing a via hole by a bridge girder erection machine;
s2.2, suspending the rear supporting leg and the front auxiliary supporting leg in the air, driving the single guide beam and the front auxiliary supporting leg to move forward for a certain distance by using the front supporting leg and the middle supporting leg suspension system, and keeping the front hanging beam travelling crane and the rear hanging beam travelling crane near the middle supporting leg as counter weights;
s2.3, erecting the rear supporting leg, suspending the middle supporting leg in the air, and erecting the middle supporting leg after the middle supporting leg moves forwards for a certain distance;
s2.4, suspending the rear supporting leg in the air, and driving the single guide beam and the front auxiliary supporting leg to move forward for a certain distance by using the front supporting leg and the middle supporting leg suspension system to enable the front auxiliary supporting leg to reach the front position of the front abutment; erecting the front auxiliary supporting leg, and supporting the front auxiliary supporting leg on the cleaned ground and the front auxiliary supporting leg sleeper beam;
and S2.5, erecting the rear supporting leg, suspending the middle supporting leg in the air, and erecting the middle supporting leg after the middle supporting leg moves forwards for a certain distance.
Further, the S3 includes the following steps:
s3.1, hoisting the drilling machine to the ground position of a construction site by utilizing a No. 2 traveling crane and a No. 3 traveling crane of the bridge girder erection machine by a fishing method, and preparing to drill a pile foundation hole;
s3.2, transporting the foundation enclosure to the tail of the bridge crane by using a transport vehicle, hoisting the enclosure from the tail of the bridge crane to a bridge construction area by using a No. 2 traveling crane and a No. 3 traveling crane, and arranging auxiliary equipment such as the enclosure, a mud pit and the like by using a No. 1 traveling crane;
s3.3, the drilling machine moves and adjusts in the vertical and horizontal directions of the drilling machine platform, and after the platform support is adjusted and aligned by a No. 1 traveling crane, drilling construction is started;
s3.4, after the construction of the drilling machine reaches the standard, lifting the drilling machine, lifting the steel casing, and lifting the pile foundation reinforcement cage into the hole by a fishing method;
s3.5, pouring concrete into the pile foundation;
s3.5.1, lifting the truck and the concrete tanker to the bridge floor by a lifter;
s3.5.2, the air pump truck is driven to the tail part of the support leg in the bridge crane, the concrete transporting tank truck is aligned to start the pouring work, and the air pump truck and the concrete transporting tank truck return after the pile foundation pouring is finished;
and finishing the construction of the residual pile foundation according to the same steps, and curing the pile foundation.
Further, the S4 includes the following steps:
s4.1, after the foundation pit of the bearing platform is excavated in place, manually breaking and detaching a pile head, and annularly processing a pile head reinforcing steel bar;
s4.2, tamping a bearing platform foundation;
s4.3, the bearing platform template is transported and lifted to a bearing platform construction station from the tail part of the bridge crane through the No. 2 travelling crane and the No. 3 travelling crane, and is installed and fixed in place;
s4.4, hoisting the bound steel bars to a construction position of a bearing platform from the tail part of the bridge girder erection machine through the No. 2 traveling crane and the No. 3 traveling crane, and completing binding of all the steel bars;
and S4.5, pouring concrete into the bearing platform and curing the concrete of the bearing platform.
Further, in the step S5, a cast-in-place method is used for pier construction, including the following steps;
s5.1, measuring the bearing platform surface and marking;
s5.2, hoisting the pier template supports and the working well standard sections to a bearing platform construction station one by one from the tail part of the bridge crane through a No. 2 travelling crane and a No. 3 travelling crane, and splicing and positioning by utilizing a No. 1 travelling crane;
s5.3, binding the sectional pier body reinforcing steel bars; hoisting the pier body reinforcing steel bars to the pier body section one by one from the tail part of the bridge girder erection machine through the No. 2 travelling crane and the No. 3 travelling crane, and binding;
s5.4, pouring the segmented pier body through a concrete pump truck and a concrete tank truck;
s5.5, constructing the bridge piers according to the bridge pier height sections, and completing all pier body construction according to the steps S5.2, S5.3 and S5.4;
and S5.6, curing the bridge pier with concrete.
Or the pier in the S5 is constructed in a prefabricated and assembled mode and comprises the following steps;
s5.1, hoisting the prefabricated pier column and the capping beam to a construction station through a No. 2 travelling crane and a No. 3 travelling crane;
s5.2, assembling the prefabricated pier column and the bearing platform by using the No. 1 traveling crane;
and S5.3, assembling the bent cap and the prefabricated pier column by using the No. 1 traveling crane.
Further, the S6 includes the following steps:
s6.1, after the construction of the bridge pier is completed, suspending the middle supporting leg in the air, moving the middle supporting leg forward to be close to the front supporting leg, and supporting the middle supporting leg;
s6.2, suspending the front supporting leg, driving the front supporting leg to move forward to reach the position of the front bridge abutment frame beam, and supporting the front supporting leg;
s6.3, conveying the section beams to the position of a girder lifting point in sections, and placing the section beams on an assembling platform (21) by using a girder lifting machine to complete assembling and expanding of the box girder; then, lifting the box girder to a bridge deck girder transporting vehicle by using a girder lifting machine;
s6.4, when the girder transporting vehicle approaches the position of the bridge girder erection machine, the rear support legs are turned over, and the No. 2 traveling vehicle and the No. 3 traveling vehicle are driven to the front part of the bridge girder erection machine and exceed the position of the front support legs; the front beam vehicle moves to the lifting beam position of the front lifting beam vehicle and stops;
s6.5, lifting the front part of the box girder by the front hanging girder crane, and synchronously operating the front hanging girder crane and the main girder of the girder transporting vehicle; the main vehicle of the beam transporting vehicle travels to the lifting beam position of the rear lifting beam traveling vehicle, the rear support legs are supported, and the rear lifting beam traveling vehicle lifts the tail part of the box beam;
s6.6, synchronously moving the box girder forwards to the span of the girder to be erected by the front hanging girder crane and the rear hanging girder crane, and aligning and dropping the girder to complete the erection of the box girder;
s6.7, turning over the rear supporting legs, returning the girder transporting vehicle to the girder lifting point to transport the girder, and completing erection of the bridge span.
Furthermore, the No. 2 travelling crane and the No. 3 travelling crane are arranged on the lower ear beam of the single guide beam.
Preferably, when the front auxiliary supporting leg moves forwards, the suspension height of the front auxiliary supporting leg is greater than the height of the front plant.
Furthermore, the front auxiliary supporting leg comprises a telescopic support, a supporting steel sleeper beam arranged at the lower end of the telescopic support and a supporting plate sleeper beam; the top surface of the supporting plate sleeper beam is connected with the bottom surface of the supporting steel sleeper beam, and the bottom surface of the supporting plate sleeper beam is provided with a plurality of ground grabbing nails.
Compared with the prior art, the invention has the following beneficial effects:
the invention utilizes the fishing method bridge girder erection machine, auxiliary equipment and facilities, adopts the fishing method construction process to finish the erection construction of pile foundations, bearing platforms, piers and bridges, does not need to set a construction access any more, reduces the green plant transplanting amount to the minimum, only transplants in the projection range of the abutment, can more completely keep the original landform, protects the activity space of wild small animals as much as possible, and is beneficial to furthest keeping the harmony between human beings and nature.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a front view of a first front structure of the present invention;
FIG. 3 is a top view of a single guide beam and a partial double beam;
FIG. 4 is a cross-sectional view at A in FIG. 2 (No. 1 row cart and front auxiliary leg not shown);
FIG. 5 is a cross-sectional view at B in FIG. 2 (front auxiliary leg not shown);
FIG. 6 is a front view of a second front structure of the present invention;
FIG. 7 is a schematic view of the front auxiliary leg extended to its maximum configuration;
FIG. 8 is a schematic view of the front auxiliary leg being retracted to the minimum;
FIG. 9 is a schematic view of the lower end of the front auxiliary leg;
FIG. 10 is a schematic illustration of a construction preparation frame beam;
FIG. 11 is a schematic illustration of a bridge girder erection machine preparing a via;
FIG. 12 is a schematic view of a bridge girder erection machine during via-drilling;
FIG. 13 is a schematic illustration of a bridge girder erection machine during via drilling;
FIG. 14 is a schematic view of the front auxiliary leg just prior to reaching the front abutment;
FIG. 15 is a schematic view of the bridge girder erection machine after hole passing;
fig. 16 is a preparation view of pile foundation construction;
fig. 17 is a schematic view of the drilling construction in the pile foundation construction;
FIG. 18 is a schematic view of the pile foundation reinforcement cage being hoisted into the hole;
FIG. 19 is a schematic view of pile foundation concrete during pouring;
FIG. 20 is a schematic view of the reinforcement bars being tied in the construction of the bearing platform;
FIG. 21 is a schematic view of the basin during pouring;
FIG. 22 is a schematic view of the working well, enclosure, steel membrane, and reinforcing steel in place;
fig. 23 is a schematic view when pouring pier shaft concrete;
fig. 24 is a schematic view after the construction of a pier is completed;
FIG. 25 is a schematic view of the center leg being moved forward closer to the front leg;
FIG. 26 is a schematic illustration of the forward leg being moved forward to the forward abutment beam position;
FIG. 27 is a schematic view of a sectional box beam;
FIG. 28 is a schematic view of the front suspension beam crane lifting the front portion of the box girder;
FIG. 29 is a schematic view of the front and rear suspension beam cranes lifting the box beam;
FIG. 30 is a schematic view of the completion of erection of the box girder;
FIG. 31 is a side view of a rotary drilling rig for the construction of a fishing method according to the present invention;
FIG. 32 is a front view of a rotary drilling rig for fishing construction according to the present invention;
FIG. 33 is a plan view of a rotary drilling rig for fishing construction according to the present invention;
FIG. 34 is a partial schematic view of the connection of the power head, water permeable casing, drill stem.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings.
The construction method for constructing the bridge by the bridge crane fishing method disclosed by the invention utilizes the fishing bridge girder erection machine, auxiliary equipment and facilities, and adopts the fishing construction process to finish the erection construction of the pile foundation, the bearing platform, the bridge pier and the bridge, no construction access is arranged, and the damage to the environment and the influence of wild animals and plants under the bridge can be reduced as much as possible.
The fishing method bridge girder erection machine is improved on the basis of the existing single-beam bridge girder erection machine, and is mainly different from the existing single-beam bridge girder erection machine in that a partial double-beam mechanism is adopted at the front part, and in addition, a front auxiliary supporting leg and three working traveling cranes are additionally arranged.
As shown in fig. 1-5, the fishing bridge girder erection machine disclosed by the invention comprises a front support leg 1, a middle support leg 2, a rear support leg 3, a front hanging beam traveling crane 4, a rear hanging beam traveling crane 5, a single guide beam 6, a front auxiliary support leg 7, a traveling crane No. 1, a traveling crane No. 2, and a traveling crane No. 3 13. The front hanging beam travelling crane 4 and the rear hanging beam travelling crane 5 are positioned on the single guide beam 6. The front auxiliary leg 7 is telescopic. The front auxiliary supporting leg 7 has various extension modes, and common extension mechanisms such as an oil cylinder extension mechanism and the like can be adopted.
Since the front, middle and rear legs 1, 2, 3 are supported on the viaduct and the front auxiliary leg 7 is supported on the ground, the length of the front auxiliary leg 7 should be longer than the front, middle and rear legs 1, 2, 3.
To minimize damage to vegetation, it is preferred that the front auxiliary leg 7 be retractable to span over the vegetation. Thus, the telescopic bracket 71 of the front auxiliary leg 7 in this embodiment comprises a winch lifting structure to achieve a wide range of variation of the front auxiliary leg 7.
As shown in fig. 7 and 8, the lower part of the telescopic bracket 71 of the invention adopts an oil cylinder telescopic mechanism, and the upper part adopts a winch lifting structure. When short vegetation is required to pass, the vegetation can pass only by adjusting the retraction of the oil cylinder telescopic mechanism; when vegetation of a certain height needs to pass through, the oil cylinder telescopic mechanism and the winch lifting structure are adjusted simultaneously, so that the lower part of the telescopic support 71 retracts, and the upper part of the telescopic support 71 is folded to shorten the telescopic support 71, so that the vegetation can cross over the vegetation.
As shown in fig. 9, the front auxiliary leg 7 includes a telescopic bracket 71, a support steel bolster 72 mounted to a lower end of the telescopic bracket 71, and a support plate bolster 73. The support plate bolster 73 is larger in area than the support steel bolster 72. The top surface of the support plate sleeper beam 73 is connected with the bottom surface of the support steel sleeper beam 72, and the bottom surface of the support plate sleeper beam 73 is provided with a plurality of ground grabbing nails 74.
The front auxiliary supporting leg 7 is positioned at the front end of the single guide beam 6, and two longitudinal short beams 9 are respectively arranged on two sides of the front part of the single guide beam 6.
The No. 2 travelling crane 12 and the No. 3 travelling crane 13 are arranged on the single guide beam 6 and can move to the space between the two short beams 9 along the longitudinal direction of the single guide beam 6. The running tracks of the No. 2 travelling crane 12 and the No. 3 travelling crane 13 are longitudinally laid on the lower ear beam 61 of the single guide beam 6. The No. 2 traveling crane 12 and the No. 3 traveling crane 13 are mainly used for hoisting of a drilling machine which comprises construction auxiliary equipment such as a drilling machine support platform, a bearing platform template, a pier body template, a support working well, concrete, reinforcing steel bars and the like, and facilities, and transporting and hoisting of construction wastes such as waste residues, waste soil, waste water and the like.
The No. 1 traveling crane 8 is arranged on the two short beams 9, the bridge frame of the No. 1 traveling crane 8 can longitudinally run along the tracks laid on the two short beams 9, and the crane trolley of the No. 1 traveling crane 8 can transversely run along the tracks laid on the bridge frame. The device is mainly used for transverse movement and short-distance longitudinal movement of equipment within the range of a bearing platform, and is closely matched with the No. 2 traveling crane 12 and the No. 3 traveling crane 13 to finish fishing method construction operation.
The short beam 9 is fixedly connected with the single guide beam 6 through a cross beam. As shown in fig. 2-5, the cross beam comprises a front cross beam 10 and a rear cross beam 11, the rear cross beam 11 is higher than the front cross beam 10, one end of the front cross beam 10 is fixedly connected with the side surface of the single guide beam 6, and the other end of the front cross beam 10 is fixedly connected with the side surface of the short beam 9; one end of the rear cross beam 11 is fixedly connected with the side surface of the single guide beam 6, and the other end of the rear cross beam 11 is fixedly connected with the top surface of the short beam 9.
As shown in fig. 2, the front cross member 10 and the rear cross member 11 are provided at the front end of the short beam 9. Of course, as shown in fig. 6, the front cross member 10 and the rear cross member 11 may be provided at the front and rear ends of the short member 9, respectively.
The invention discloses a construction method for constructing a bridge by a bridge crane fishing method, which comprises the following steps,
s1, constructing the first frame section, as shown in figure 10:
s1.1, finding a relatively optimal point position at a linear position allowing construction of a bridge girder erection machine by a fishing method and a position adjacent to a highway, and completing construction of a bridge pile foundation, a bearing platform and a bridge pier with 3-5 spans by adopting the conventional method in advance;
s1.2, assembling the cross-line gantry crane 15;
s1.3, assembling the segmental box girder 20 and erecting the 3-5 span box girder 20 by using the span gantry crane 15;
s1.4, assembling the bridge girder erection machine, the girder transporting vehicle 14 and the logistics vehicle by using the cross-line gantry crane 15.
The fishing method bridge girder erection machine via hole comprises the following steps:
s2.1, as shown in the figure 11, after the 30m beam is erected, opening a front hanging beam travelling crane 4 and a rear hanging beam travelling crane 5 to the position of the middle support leg 2, and preparing a via hole by a bridge girder erection machine;
s2.2, as shown in figure 12, suspending the rear supporting leg 3 and the front auxiliary supporting leg 7 in the air, driving the single guide beam 6 and the front auxiliary supporting leg 7 to move forward by 25m by using the suspension systems of the front supporting leg 1 and the middle supporting leg 2, and keeping the front hanging beam travelling crane 4 and the rear hanging beam travelling crane 5 near the middle supporting leg 2 to be used as a balance weight; the height of the front auxiliary leg 7 is determined according to the height of the front plant, and preferably can completely span from the top of the front plant.
S2.3, as shown in figure 13, erecting the rear support leg 3, suspending the middle support leg 2 in the air, and erecting the middle support leg 2 after the middle support leg 2 moves forwards for 5 m;
s2.4, as shown in figure 14, suspending the rear supporting leg 3, driving the single guide beam 6 and the front auxiliary supporting leg 7 to move forwards for 5m by using the suspension system of the front supporting leg 1 and the middle supporting leg 2, enabling the front auxiliary supporting leg 7 to reach the front position of the front abutment, supporting the front auxiliary supporting leg 7,
the front auxiliary leg 7 is supported on the cleaned ground by the supporting steel sleeper beam 72 and the supporting plate sleeper beam 73 of the front auxiliary leg 7 and the ground grabbing nail 74, so that the front auxiliary leg 7 is stably and firmly supported.
S2.5, as shown in FIG. 15, erecting the rear support leg 3, suspending the middle support leg 2 in the air, moving the middle support leg 2 forward by 10m, and erecting the middle support leg 2;
s3, pile foundation construction, comprising the following steps:
s3.1, hoisting the spiral drilling machine or the percussion drilling machine to the front ground position by using the traveling crane No. 2 and the traveling crane No. 3 of the bridge erecting machine by a fishing method, wherein the spiral drilling machine or the percussion drilling machine is provided with a special platform and is ready;
s3.2, as shown in the figure 16, the transport vehicle 16 transports the foundation enclosure to the tail of the bridge crane, the enclosure is hung to a bridge construction area from the tail of the bridge crane by using the No. 2 traveling crane 12 and the No. 3 traveling crane 13, and auxiliary equipment such as the enclosure, a mud pit and the like are arranged by using the No. 1 traveling crane 8;
s3.3, as shown in figure 17, adjusting the position of a drilling machine according to the position of a pre-drilled hole, starting drilling construction after the drilling machine adjusts alignment, enabling slurry to enter a slurry tank through a special pipeline, and enabling waste residues to be transported back to a slag car 17 at the tail part of the bridge crane through a No. 2 travelling crane 12 and a No. 3 travelling crane 13 to be transported to a specified waste residue field;
s3.4, as shown in the figure 18, after the construction of the drilling machine reaches the standard, lifting the drilling machine, and lifting the pile foundation reinforcement cage into the hole by a fishing method;
s3.5, as shown in figure 19, pouring concrete into the pile foundation;
s3.5.1, the air pump truck 18 and the concrete transporting tank truck 19 are driven to the position of the beam lifting point and lifted to the bridge floor by a large-tonnage lifter;
s3.5.2, the air pump truck 18 is driven to the tail part of the landing leg 2 in the bridge crane, and the width of the beam surface of the support pad fixed in position meets the working surface of the air pump truck 18;
s3.5.3, the concrete transporting and transporting car 19 starts the pouring work in the contraposition,
s3.5.4, after the pile foundation is poured, the air pump truck 18 and the concrete transporting and transporting truck 19 return;
s3.6, finishing the residual pile foundation according to the same steps; in the stage of pile foundation health maintenance, auxiliary appliances such as a drilling machine, a drilling machine support platform, a wastewater tank and the like are hoisted to the tail part of the bridge crane and are retreated.
And the construction of the bearing platform comprises the following steps:
s4.1, after the foundation pit of the bearing platform is excavated in place, manually breaking and detaching a pile head, and annularly processing a pile head reinforcing steel bar;
s4.2, tamping a bearing platform foundation;
s4.3, the bearing platform template is transported and lifted to a bearing platform construction station from the tail part of the bridge crane through a No. 2 travelling crane 12 and a No. 3 travelling crane 13, and is installed, fixed and in place;
s4.4, binding steel bars: hoisting the crane 2 and the crane 3 from the tail of the bridge girder erection machine to a construction site of a bearing platform, and completing the binding of all steel bars, as shown in fig. 20;
s4.5, pouring concrete into the bearing platform; as shown in figure 21 of the drawings,
s4.5.1, the air pump truck 18 and the concrete transporting tank truck 19 are driven to the position of the beam lifting point and lifted to the bridge floor by a large-tonnage lifter;
s4.5.2, the air pump truck 18 is driven to the tail part of the landing leg 2 in the bridge crane, and the width of the beam surface of the support pad fixed in position meets the working surface of the air pump truck 18;
s4.5.3, the concrete transporting and transporting car 19 starts the pouring work in the contraposition,
s4.5.4, after the concrete pouring of the bearing platform is finished, the air pump truck 18 and the concrete transporting and transporting truck 19 return;
4.6, in the stage of maintaining the concrete of the bearing platform, hoisting auxiliary equipment such as a steel mould of the bearing platform, a mud pit box and the like to the tail part of the bridge crane, and withdrawing from the field; chiseling the foundation surface of the pier body of the bearing platform and cleaning the bearing platform.
And (3) bridge pier construction: in the embodiment, the bridge pier is constructed by adopting a cast-in-place method, and the construction method specifically comprises the following steps:
s5.1, measuring the bearing platform surface and marking;
s5.2, as shown in the figure 22, hoisting the pier template support and the working well with the green fence standard section to a bearing platform construction station one by one from the tail part of the bridge crane through a No. 2 travelling crane 12 and a No. 3 travelling crane 13, and assembling, positioning and installing in sections by utilizing a No. 1 travelling crane 8;
s5.3, binding the sectional pier body reinforcing steel bars; hoisting pier body reinforcing steel bars to the pier body section one by one from the tail part of the bridge girder erection machine through a No. 2 traveling crane 12 and a No. 3 traveling crane 13, and binding;
s5.4, as shown in the figure 23, pouring the sectional pier body concrete; pouring the segmented pier body through a concrete pump truck and a concrete tank truck;
s5.5, constructing the bridge piers according to the bridge pier height sections, and completing all pier body construction according to the steps S5.2, S5.3 and S5.4;
s5.6, in the bridge pier concrete curing stage, disassembling the supports, the templates, the working well and the like one by one through a No. 2 traveling crane 12 and a No. 3 traveling crane 13; hoisting the tail part of the bridge returning machine and returning to the field; as shown in fig. 24;
s5.7, after the pier stud construction is finished, strictly cleaning a construction site under each pier, and cleaning all construction sundries to restore the natural ecological original appearance as much as possible;
s6, bridging machine girder: the bridge pier is supported after the strength reaches a certain degree. The method specifically comprises the following steps:
s6.1, as shown in figure 25, after the construction of the pier is completed, the middle support leg 2 of the suspended bridge girder erection machine moves forwards for 15m to be close to the front support leg 1, and then the middle support leg 2 is supported;
s6.2, as shown in the figure 26, the front supporting leg 1 is retracted, the front supporting leg 1 is driven to move forwards for 30m to reach the position of the front bridge abutment beam, and the front bridge abutment beam is accurately and firmly supported in place;
s6.3, as shown in the figure 27, conveying the section beams to the position of a girder lifting point in sections, placing the section beams on an assembling platform 21 by using a girder lifting machine, completing assembling, tensioning and seaming of the box girder 20, and enabling the strength to reach the standard; lifting the box girder 20 to the bridge deck girder transporting vehicle 14 by using a girder lifting machine;
s6.4, as shown in figure 28, when the girder transporting vehicle 14 approaches the position of the bridge girder erection machine, turning over the rear support legs 3, the traveling vehicles 12 and 13 to the front part of the bridge girder erection machine and exceeding the position of the front support leg 1; the front beam carrying vehicle 14 slowly moves to the lifting beam position of the front lifting beam travelling vehicle 4 and stops.
S6.5, as shown in the figure 28, the front hanging beam travelling crane 4 lifts the front part of the box girder 20, and the front hanging beam travelling crane 4 and the main girder of the girder transporting vehicle run synchronously; as shown in fig. 29, the main body of the girder transporting vehicle travels to the lifting beam position of the rear lifting beam traveling vehicle 5, the supporting oil cylinder and the rear support leg 3 of the girder transporting vehicle are supported, and the rear lifting beam traveling vehicle 5 lifts the tail part of the box girder 20;
s6.6, as shown in the figure 30, the front hanging beam travelling crane 4 and the rear hanging beam travelling crane 5 hoist the box girder 20 to synchronously move forwards to a girder span to be erected, and the girder is aligned and dropped to complete erection of the box girder 20; after the support legs 3 are turned over, the girder transporting vehicle 14 returns to a girder lifting point for transporting the girder; the bridge span is erected;
and (4) passing through a hole on a cantilever of the bridge girder erection machine by the fishing method to prepare for entering the next circular construction operation by the fishing method.
In another embodiment, the pier can be constructed by adopting prefabricated assembly. The assembly construction pier has higher butt joint installation difficulty than a cast-in-place method, but can improve the construction efficiency. The bridge pier prefabricating and assembling construction comprises the following steps;
s5.1, hoisting the prefabricated pier column and the capping beam to a construction station through a No. 2 travelling crane 12 and a No. 3 travelling crane 13;
s5.2, assembling the prefabricated pier column and the bearing platform by utilizing the No. 1 traveling crane 8;
and S5.3, assembling the bent cap and the prefabricated pier column by using the No. 1 traveling crane 8.
The invention also discloses a rotary drilling rig for fishing method construction, which comprises a rotary drilling rig body 200, a support frame and a transverse movement driving mechanism for driving the rotary drilling rig body 200 to horizontally move, as shown in fig. 31, 32 and 33. Be equipped with horizontal slide rail on the support frame, dig soon and bore body 200 and horizontal slide rail sliding connection, drive through sideslip actuating mechanism and dig soon and bore the horizontal rectilinear movement of body 200 and can realize digging soon the sideslip that bores body 200 and shift, and then realize holing fast in different positions.
In this embodiment, the support frame includes a base 100 and a gantry 900, the bottom of the gantry 900 is fixedly connected to the base 100, a lower horizontal slide rail 700 is fixedly mounted on the base 100, an upper horizontal slide rail 400 is fixedly mounted on the gantry 900, the bottom of the rotary drilling rig body 200 is slidably connected to the lower horizontal slide rail 700, the side of the rotary drilling rig body 200 is slidably connected to the upper horizontal slide rail 400, and a traverse driving mechanism is mounted on the base 100.
The rotary drilling rig body 200 in the embodiment comprises a drill rod 210, a power head 220, a drilling tool 230, a mast assembly and a water permeable casing 270. The mast assembly comprises a mast 240, a lifting oil cylinder, a winch 260 and a pulley yoke, the power head 220, the lifting oil cylinder, the winch 260 and the pulley yoke are arranged on the mast 240, and the lifting oil cylinder is used for lifting the power head.
The mast 240 is slidably mounted on the support frame, the bottom of the mast 240 has a lower chute 600 slidably engaged with the lower horizontal rail 700, and the side wall of the mast 240 has an upper chute 300 slidably engaged with the upper horizontal rail 400. The sliding groove and the sliding rail can be quickly assembled and disassembled, the supporting frame and the rotary drilling drill body can be conveniently hoisted in the fishing construction process, and the sliding rail can be correspondingly arranged in the groove after being hoisted in place. For more convenient assembly and disassembly, the notches of the lower chute 600 and the upper chute 300 are downward.
The wire rope 250 of the hoist 260 is connected to the top of the drill pipe 210 after passing around the pulley at the top of the mast 240, and the bottom of the drill pipe 210 is connected to the drilling tool 230.
As shown in fig. 31 and 34, in the present embodiment, a water permeable casing 270 is additionally provided on the drill rod of the rotary drilling rig body, and the water permeable casing 270 is a circular steel casing, and water permeable holes are arranged on the wall of the circular steel casing.
As shown in fig. 34, the water permeable casing 270 is detachably mounted on the lower portion of the power head 220, and the water permeable casing 270 is detached from the power head 220 during drill lifting; during drilling, after the drill bit enters the water permeable casing 270 again, the water permeable casing 270 is connected with the power head 220, and when the drill rod 210 descends, the water permeable casing 270 can be driven to descend. During drilling, the water permeability of the wall of the protective cylinder enables the water pressure inside and outside the cylinder to be balanced, so that stable pore forming is facilitated, and the risk of hole collapse is reduced.
In this embodiment, the water permeable casing 270 is detachably connected to the power head 220 by a fastener 280. The lower part of the power head 220 is provided with a pressure plate 290, one end of a buckle 280 is hinged with the pressure plate 290, and the other end of the buckle 280 can be operated to buckle the water permeable casing 270.
Preferably, the top of the water permeable casing 270 has a flange, and the fastener 280 is a U-shaped fastener. After the drill bit enters the water permeable casing 270, the pressing plate 290 presses the flange of the water permeable casing 270, and then the flange of the water permeable casing 270 and the pressing plate 290 are buckled together by using the U-shaped buckle; when the drill is lifted, the U-shaped buckle is hammered out, so that the permeable pile casing 270 loses restraint.
The transverse moving driving mechanism comprises a transverse moving motor 800 and a transmission mechanism, and the transmission mechanism is used for converting the rotary motion of the transverse moving motor 800 into the horizontal linear motion of the rotary drilling body 200. The transmission mechanism is a chain transmission mechanism, or a synchronous belt transmission mechanism, or a lead screw nut transmission mechanism, or a gear rack mechanism and the like.
For improving the pore-forming efficiency, the rotary drilling body 200 can be provided with two parts, and each rotary drilling body 200 is provided with one transverse moving driving mechanism respectively. The two rotary drilling bodies 200 are arranged in a back-to-back mode, one rotary drilling body is located on the front face of the portal 900, and the other rotary drilling body is located on the back face of the portal 900.
According to the rotary drilling rig, the rotary drilling rig body 200 can be transversely moved on the track of the base 100 under the driving of the transverse moving motor 800, so that drilling at different positions is facilitated, the drilling position can be changed without moving a support frame, and the construction efficiency can be improved. Two rotary drilling rigs are arranged on the support frame, two holes can be drilled simultaneously, and the construction efficiency can be further improved.
The rotary drilling rig body 200 and the support frame can be quickly disassembled and connected, so that the rotary drilling rig can be conveniently hoisted respectively during construction by a fishing method, and can be quickly assembled after being hoisted in place.
The power is transmitted between the traverse motor 800 and the rotary drilling body 200 by a transmission mechanism, and the connection of the parts is different due to different transmission mechanisms, but the connection is conventional in the field and is not described again here.
The method for constructing the fishing pile foundation by using the rotary drilling rig for the fishing construction, namely the step S3, comprises the following steps;
then, hoisting the rotary drilling bodies 200 of the No. 2 travelling crane and the No. 3 travelling crane of the bridge girder erection machine by the fishing method to the front ground position respectively, and correspondingly putting the sliding rails of the support frame into the sliding grooves of the rotary drilling bodies 200 to complete the assembly of the rotary drilling machine for the fishing method construction;
the transverse position of the rotary drilling bodies 200 is adjusted through a transverse moving motor on the support frame, so that the two rotary drilling bodies 200 move to working positions respectively;
The environmental protection measures adopted in the construction process comprise:
(1) if the mud wall protection method is adopted, mud water enters a lower bottom closed mud box through a special pipeline in pile foundation construction and never flows into a polluted river channel;
(2) all the devices generating noise have closed working environments, including the bridge construction working well 㚈 which is surrounded in a closed mode by green woven cloth;
(3) the sand stone material that easily produces the raise dust is picked up with water with the adoption. Raising dust on roads in summer to keep watering vehicles to sprinkle water frequently;
(4) according to design requirements, the concrete is transported to an environment-friendly specified slag disposal site in time, and the construction site does not store a large amount of waste slag.
The invention does not set a construction access, has the least transplanting amount of green plants, only transplants in the projection range of the abutment, completely reserves the original landform, protects the activity space of the wild small animals as much as possible, and has high harmony between human and nature.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it is therefore intended that all such changes and modifications as fall within the true spirit and scope of the invention be considered as within the following claims.
Claims (10)
1. The construction method for constructing the bridge by the bridge crane fishing method is characterized by comprising the following steps: comprises the following steps;
s1, constructing the first frame section: firstly, completing construction of at least 3-span bridge pile foundations, bearing platforms and piers, erecting a first frame section box girder, and then completing assembly of a cross-line gantry crane, a bridge girder erection machine by a fishing method, a girder transporting vehicle and a logistics vehicle;
the fishing method bridge girder erection machine comprises a front supporting leg, a middle supporting leg, a rear supporting leg, a front hanging beam crane, a rear hanging beam crane, a single guide beam, a crane No. 1, a crane No. 2, a crane No. 3 and a telescopic front auxiliary supporting leg, wherein the front hanging beam crane and the rear hanging beam crane are positioned on the single guide beam, the front auxiliary supporting leg is positioned at the front end of the single guide beam, two longitudinal short beams are respectively arranged on two sides of the front part of the single guide beam, and the short beams are fixedly connected with the single guide beam through cross beams;
the No. 1 travelling crane is installed on the two short beams, the bridge frame of the No. 1 travelling crane can longitudinally run along the tracks laid on the two short beams, the crane trolley of the No. 1 travelling crane can transversely run along the tracks laid on the bridge frame, and the No. 2 travelling crane and the No. 3 travelling crane are installed on the single guide beam and can longitudinally run between the two short beams along the single guide beam;
s2, passing through holes of the fishing bridge girder erection machine, so that the front support legs are supported on the front pier; the front auxiliary supporting leg reaches the front position of the front abutment and is supported on the ground;
s3, pile foundation construction;
hoisting the drilling machine to the ground position of the front axle platform by using the No. 2 travelling crane and the No. 3 travelling crane;
after the drilling machine is aligned, pile foundation hole drilling construction is started;
after the pile foundation is formed into a hole, hoisting the pile foundation reinforcement cage into the hole by a fishing method; then, pile foundation concrete pouring and pile foundation curing are carried out;
s4, constructing a bearing platform;
the bridge crane is transported to a bearing platform construction position from the tail part of the bridge crane through a No. 2 travelling crane and a No. 3 travelling crane and is installed in place;
hoisting the bearing platform template and the binding steel bars from the tail part of the bridge girder erection machine to a bearing platform construction position through a No. 2 travelling crane and a No. 3 travelling crane, completing the installation of the bearing platform template and the binding of all the steel bars, and then performing the pouring of the bearing platform and the maintenance of the bearing platform;
s5, construction of piers:
s6, beam:
the middle supporting leg moves forwards for a certain distance and then is supported; the front support legs move forwards to reach the positions of the front bridge rack beams and are supported;
the front hanging beam crane and the rear hanging beam crane hang the box girder to a span of the girder to be erected, and the girder falls in a contraposition manner, so that the span box girder erection is completed;
and returning to the step 2, and preparing to enter the next fishing method circulation construction operation.
2. The construction method according to claim 1, characterized in that: the S1 includes the following steps;
s1.1, completing construction of 3-5-span bridge pile foundations, bearing platforms and piers in advance;
s1.2, assembling the cross-line gantry crane;
s1.3, erecting the 3-5 span box girder by using a span gantry crane;
s1.4, assembling the bridge girder erection machine, the girder transporting vehicle and the logistics vehicle by using the cross-line gantry crane.
3. The construction method according to claim 1, characterized in that: the S2 includes the following steps;
s2.1, after the construction of the first frame section is finished, opening the front hanging beam travelling crane and the rear hanging beam travelling crane to the position of the middle support leg, and preparing a via hole by a bridge girder erection machine;
s2.2, suspending the rear supporting leg and the front auxiliary supporting leg in the air, driving the single guide beam and the front auxiliary supporting leg to move forward for a certain distance by using the front supporting leg and the middle supporting leg suspension system, and keeping the front hanging beam travelling crane and the rear hanging beam travelling crane near the middle supporting leg as counter weights;
s2.3, erecting the rear supporting leg, suspending the middle supporting leg in the air, and erecting the middle supporting leg after the middle supporting leg moves forwards for a certain distance;
s2.4, suspending the rear supporting leg in the air, and driving the single guide beam and the front auxiliary supporting leg to move forward for a certain distance by using the front supporting leg and the middle supporting leg suspension system to enable the front auxiliary supporting leg to reach the front position of the front abutment; erecting the front auxiliary supporting leg, and supporting the front auxiliary supporting leg on the cleaned ground and the front auxiliary supporting leg sleeper beam;
and S2.5, erecting the rear supporting leg, suspending the middle supporting leg in the air, and erecting the middle supporting leg after the middle supporting leg moves forwards for a certain distance.
4. The construction method according to claim 1, characterized in that: the S3 includes the steps of:
s3.1, hoisting the drilling machine to the ground position of a construction site by utilizing a No. 2 traveling crane and a No. 3 traveling crane of the bridge girder erection machine by a fishing method, and preparing to drill a pile foundation hole;
s3.2, transporting the foundation enclosure to the tail of the bridge crane by using a transport vehicle, hoisting the enclosure from the tail of the bridge crane to a bridge construction area by using a No. 2 traveling crane and a No. 3 traveling crane, and arranging auxiliary equipment such as the enclosure, a mud pit and the like by using a No. 1 traveling crane;
s3.3, the drilling machine moves and adjusts in the vertical and horizontal directions of the drilling machine platform, and after the platform support is adjusted and aligned by a No. 1 traveling crane, drilling construction is started;
s3.4, after the construction of the drilling machine reaches the standard, lifting the drilling machine, and lifting the pile foundation reinforcement cage into the hole by a fishing method;
s3.5, pouring concrete into the pile foundation;
s3.5.1, lifting the truck and the concrete tanker to the bridge floor by a lifter;
s3.5.2, the air pump truck is driven to the tail part of the support leg in the bridge crane, the concrete transporting tank truck is aligned to start the pouring work, and the air pump truck and the concrete transporting tank truck return after the pile foundation pouring is finished;
and finishing the construction of the residual pile foundation according to the same steps, and curing the pile foundation.
5. The construction method according to claim 1, characterized in that: the S4 includes the steps of:
s4.1, after the foundation pit of the bearing platform is excavated in place, manually breaking and detaching a pile head, and annularly processing a pile head reinforcing steel bar;
s4.2, tamping a bearing platform foundation;
s4.3, the bearing platform template is transported and lifted to a bearing platform construction station from the tail part of the bridge crane through the No. 2 travelling crane and the No. 3 travelling crane, and is installed and fixed in place;
s4.4, hoisting the bound steel bars to a construction position of a bearing platform from the tail part of the bridge girder erection machine through the No. 2 traveling crane and the No. 3 traveling crane, and completing binding of all the steel bars;
and S4.5, pouring concrete into the bearing platform and curing the concrete of the bearing platform.
6. The construction method according to claim 1, characterized in that: in the step S5, a cast-in-place method is adopted for pier construction, and the method comprises the following steps;
s5.1, measuring the bearing platform surface and marking;
s5.2, hoisting the pier template supports and the working well standard sections to a bearing platform construction station one by one from the tail part of the bridge crane through a No. 2 travelling crane and a No. 3 travelling crane, and splicing and positioning by utilizing a No. 1 travelling crane;
s5.3, binding the sectional pier body reinforcing steel bars; hoisting the pier body reinforcing steel bars to the pier body section one by one from the tail part of the bridge girder erection machine through the No. 2 travelling crane and the No. 3 travelling crane, and binding;
s5.4, pouring the segmented pier body through a concrete pump truck and a concrete tank truck;
s5.5, constructing the bridge piers according to the bridge pier height sections, and completing all pier body construction according to the steps S5.2, S5.3 and S5.4;
and S5.6, curing the bridge pier with concrete.
7. The construction method according to claim 1, characterized in that: the bridge pier in the S5 is constructed in a prefabricated and assembled mode and comprises the following steps;
s5.1, hoisting the prefabricated pier column and the capping beam to a construction station through a No. 2 travelling crane and a No. 3 travelling crane;
s5.2, assembling the prefabricated pier column and the bearing platform by using the No. 1 traveling crane;
and S5.3, assembling the bent cap and the prefabricated pier column by using the No. 1 traveling crane.
8. The construction method according to claim 1, characterized in that: the S6 includes the steps of:
s6.1, after the construction of the bridge pier is completed, suspending the middle supporting leg in the air, moving the middle supporting leg forward to be close to the front supporting leg, and supporting the middle supporting leg;
s6.2, suspending the front supporting leg, driving the front supporting leg to move forward to reach the position of the front bridge abutment frame beam, and supporting the front supporting leg;
s6.3, conveying the section beams to the position of a girder lifting point in sections, and placing the section beams on an assembling platform (21) by using a girder lifting machine to complete assembling and expanding of the box girder; then, lifting the box girder to a bridge deck girder transporting vehicle by using a girder lifting machine;
s6.4, when the girder transporting vehicle approaches the position of the bridge girder erection machine, the rear support legs are turned over, and the No. 2 traveling vehicle and the No. 3 traveling vehicle are driven to the front part of the bridge girder erection machine and exceed the position of the front support legs; the front beam vehicle moves to the lifting beam position of the front lifting beam vehicle and stops;
s6.5, lifting the front part of the box girder by the front hanging girder crane, and synchronously operating the front hanging girder crane and the main girder of the girder transporting vehicle; the main vehicle of the beam transporting vehicle travels to the lifting beam position of the rear lifting beam traveling vehicle, the rear support legs are supported, and the rear lifting beam traveling vehicle lifts the tail part of the box beam;
s6.6, synchronously moving the box girder forwards to the span of the girder to be erected by the front hanging girder crane and the rear hanging girder crane, and aligning and dropping the girder to complete the erection of the box girder;
s6.7, turning over the rear supporting legs, returning the girder transporting vehicle to the girder lifting point to transport the girder, and completing erection of the bridge span.
9. The construction method according to claim 1 or 3, characterized in that: and the No. 2 travelling crane and the No. 3 travelling crane are arranged on the lower ear beam of the single guide beam.
10. The construction method according to claim 1, characterized in that: the front auxiliary supporting leg comprises a telescopic bracket, a supporting steel sleeper beam arranged at the lower end of the telescopic bracket and a supporting plate sleeper beam; the top surface of the supporting plate sleeper beam is connected with the bottom surface of the supporting steel sleeper beam, and the bottom surface of the supporting plate sleeper beam is provided with a plurality of ground grabbing nails.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113718621A (en) * | 2021-08-20 | 2021-11-30 | 中铁十二局集团有限公司 | Intelligent alignment system and method for simply supported box girder |
| CN114215480A (en) * | 2021-11-15 | 2022-03-22 | 张家口路桥建设集团有限公司 | Sand flow geological rotary drill and long pile casing slurry pore-forming method adopting same |
| CN115387240A (en) * | 2022-09-20 | 2022-11-25 | 中国铁建重工集团股份有限公司 | High-efficient pore-forming device of bridge fabrication machine pile foundation construction |
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| CN110685214A (en) * | 2018-07-05 | 2020-01-14 | 中交第二航务工程局有限公司 | Pile-column integrated bridge substructure, construction device and method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113718621A (en) * | 2021-08-20 | 2021-11-30 | 中铁十二局集团有限公司 | Intelligent alignment system and method for simply supported box girder |
| CN114215480A (en) * | 2021-11-15 | 2022-03-22 | 张家口路桥建设集团有限公司 | Sand flow geological rotary drill and long pile casing slurry pore-forming method adopting same |
| CN114215480B (en) * | 2021-11-15 | 2023-09-15 | 张家口路桥建设集团有限公司 | Rotary drilling drill for drift sand geology and long casing slurry pore-forming method adopting rotary drilling drill |
| CN115387240A (en) * | 2022-09-20 | 2022-11-25 | 中国铁建重工集团股份有限公司 | High-efficient pore-forming device of bridge fabrication machine pile foundation construction |
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