CN115262426B - Construction method for high-speed intercommunicating small-curve girder erection - Google Patents
Construction method for high-speed intercommunicating small-curve girder erection Download PDFInfo
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- CN115262426B CN115262426B CN202211152149.2A CN202211152149A CN115262426B CN 115262426 B CN115262426 B CN 115262426B CN 202211152149 A CN202211152149 A CN 202211152149A CN 115262426 B CN115262426 B CN 115262426B
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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
- 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
- E01D21/08—Methods or apparatus specially adapted for erecting or assembling bridges by rotational movement of the bridge or bridge sections
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Abstract
The invention discloses a construction method of a high-speed intercommunicating small-curve girder erection, which comprises the following steps: performing hole passing operation on the bridge girder erection machine; the method comprises the steps of supporting a first column to a front abutment and supporting a second column on a bridge deck close to the abutment; feeding and dropping beams; and the front hanging beam crane and the rear hanging beam crane hoist the precast beam, and the whole bridge girder erection machine is controlled to transversely move to the girder erection position and then fall down. The construction method solves the problem that the bridge girder erection machine is difficult to construct due to the small curve radius of the intercommunicating ramp by adjusting the setting position and the construction steps when the bridge girder erection machine falls down, so that the bridge girder erection machine can be suitable for normal construction operation when the curve radius is small, and the safety in the construction operation process can be effectively ensured.
Description
Technical Field
The invention belongs to the technical field of road bridge construction, and particularly relates to a high-speed intercommunicating small-curve girder erection construction method.
Background
The hub is commonly used for traffic conversion with high speed, and a certain high-speed intercommunication project is integrally arranged into a stacked double-ring type half-alfalfa leaf cross-shaped hub intercommunication structure. The intercommunicating main line and the ramp design have a plurality of places to downwards penetrate the high-speed existing bridge, the ramp curve radius is smaller in the construction ramp design, the ramp curve radius is only 125m, the construction is difficult to carry out by adopting the existing bridge construction technology, and the safety of the construction process is difficult to be ensured.
Disclosure of Invention
The invention aims to provide a construction method for a high-speed intercommunicating small-curve girder, which solves the problem that the construction is difficult due to small ramp curve radius in the high-speed intercommunicating construction.
The invention is realized by the following technical scheme:
the construction method of the high-speed intercommunicating small-curve girder erection adopts a single-guide girder bridge girder erection machine to erect precast girders, wherein the single-guide girder bridge girder erection machine comprises a horn, a curved girder, a zero column, a first column, a second column, a third column, a hanging girder crane, a first column transverse moving track and a second column transverse moving track, the curved girder comprises a front curved girder and a rear curved girder, and the hanging girder crane comprises a front hanging girder crane and a rear hanging girder crane;
The girder erection construction method comprises the following steps:
performing hole passing operation on the bridge girder erection machine; the method comprises the steps of supporting a first column to a front abutment and supporting a second column on a bridge deck close to the abutment;
Feeding and dropping beams; the front hanging beam crane and the rear hanging beam crane hoist the precast beam, and the whole bridge girder erection machine is controlled to transversely move to the girder erection position and then fall down;
In the beam falling operation, when the inner side beam is erected, the center points of the first column and the second column on the corresponding transverse moving tracks do not exceed the corresponding abutment cover beam stop blocks and the outermost edges of the bridge deck; in the beam falling process, the transverse moving rails of the first column and the second column are transversely moved in place, the transverse moving rail wheels of the first column and the second column are locked, and then the hoisted precast beam is adjusted to the beam erecting position through an adjusting curved beam transverse moving cylinder;
When the outer side beam is erected, the transverse moving rail wheel of the first column moves to the most edge of the cover beam, then the precast beam at one end of the first column temporarily falls on the support cushion stone corresponding to the abutment, a transverse rail is arranged on the abutment close to the bridge deck, the precast beam at one end of the second column falls on the transverse rail, and then the precast beam is pushed to transversely move to the beam-erecting position and then falls.
On the other hand, in the construction method of the invention, the beam falling operation steps of the outer edge beam comprise:
After the outer beam is transversely pushed to the beam falling position, the prefabricated beam is lifted by a jack, an oil valve of the jack is locked, a transverse rail is pulled out, a support is mounted on a support backing stone, then the jack is slowly depressurized, and the prefabricated beam falls onto a corresponding support.
In the construction method of the invention, the transverse track comprises a steel rail, a roller row arranged on the steel rail and a sliding plate arranged on the roller row, and one end of the outer beam is dropped on the sliding plate of the transverse track;
the jack is adopted to transversely push the peripheral beam, in the pushing process, the pushing force is gradually increased according to the required pushing force until the precast beam starts to move, and the pushing force of the jack is reduced after the precast beam starts to move.
On the other hand, in the construction method of the invention, the via hole operation of the bridge girder erection machine comprises the following steps:
a. Connecting a front frame girder crane with a front curved girder, connecting a rear frame girder crane with a rear curved girder, horizontally turning down a third column, and supporting a first column on a pier adjacent to a bridge deck;
b. The third column is collected, the third column is moved forward to a position close to the second column by the driving arm, and the third column is supported;
c. the second column is collected and driven to move forwards for a certain distance, and the second column is supported;
d. The third column is collected, the driving arm moves forwards to the zero column to reach the position of the front abutment, and the lower cross beam of the zero column is ensured to be parallel to the central line of the front abutment before the zero column is supported;
e. a third column is supported, a second column is received, the second column is driven to move forwards to a girder supporting position, the second column is supported, and the second column is rotated before the second column is supported, so that a transverse moving track of the second column is parallel to a front abutment;
f. the first column is collected, the first column is driven to move forward to the position of the front abutment, the first column is supported, and the first column is rotated before the first column is supported, so that a transverse moving track of the first column is parallel to the central line of the abutment;
g. and (3) receiving the third column, driving the arm to move forward, adjusting the first column and the second column to enable the first column and the second column to move transversely along the first column transverse moving track and the second column transverse moving track respectively, and adjusting the bridge girder erection machine arm to enable the bridge girder erection machine arm to be parallel to the prefabricated T beam at the position to be erected.
On the other hand, in the construction method, the levelness of the horn is adjusted in the process of the via hole operation of the bridge girder erection machine, so that the levelness of the horn is not more than 0.5% all the time; when the zero column and the first column are supported, the verticality of the zero column and the first column is adjusted to be always not more than 0.5 percent.
On the other hand, in the construction method, when the first column and the second column are arranged in the via hole operation of the bridge girder erection machine, an included angle of 3-5 degrees is formed between the first column and the second column and the center line of the bent cap of the corresponding pier.
In the construction method of the invention, on the other hand, the bent cap of each bridge pier is arranged to be in a fan-shaped structure, so that an included angle of 3-5 degrees is formed between the center line of the bent cap and the prefabricated Liang Duanmian degrees.
In the construction method of the invention, on the other hand, the girder erection is sequentially an inner girder, a secondary inner girder, an outer girder, a secondary outer girder and a middle girder, and the erection operation of a hole bridge is sequentially completed.
On the other hand, in the construction method, the secondary inner side beam is erected after the inner side beam is erected, and then the diaphragm steel bars between the two prefabricated beams are welded.
On the other hand, in the construction method, the secondary outer beam is erected after the outer beam is erected, and then the diaphragm steel bars between two prefabricated beams are welded.
The construction method solves the problem that the bridge girder erection machine is difficult to construct due to the small curve radius of the intercommunicating ramp by adjusting the setting position and the construction steps when the bridge girder erection machine falls down, so that the bridge girder erection machine can be suitable for normal construction operation when the curve radius is small, and the safety in the construction operation process can be effectively ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly describe the drawings in the embodiments, it being understood that the following drawings only illustrate some embodiments of the present invention and should not be considered as limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a construction structure of a single-nose girder bridge girder erection machine frame bridge in the construction method of the invention.
Fig. 2 is a schematic diagram of a step a in the via operation of the bridge girder erection machine in the construction method of the present invention.
FIG. 3 is a schematic diagram of a step b in the operation of the bridge girder erection machine in the construction method of the invention.
Fig. 4 is a schematic diagram of a step c in the via operation of the bridge girder erection machine in the construction method of the present invention.
Fig. 5 is a schematic diagram of a step d in the via operation of the bridge girder erection machine in the construction method of the present invention.
FIG. 6 is a schematic diagram of step e in the operation of the bridge girder erection machine in the construction method of the present invention.
Fig. 7 is a schematic diagram of step f in the via operation of the bridge girder erection machine in the construction method of the present invention.
Fig. 8 is a schematic diagram of crane lifting of a front hanging beam in beam feeding operation of the construction method of the present invention.
Fig. 9 is a schematic diagram of crane lifting of a rear hanging beam in beam feeding operation of the construction method of the present invention.
Fig. 10 is a schematic view of a beam falling structure of an inner side beam in a beam falling operation of the construction method of the present invention.
Fig. 11 is a schematic view of a girder dropping structure of an outer side girder in girder dropping operation of the construction method of the present invention.
Fig. 12 is a schematic view of a transverse track structure of the construction method of the present invention.
Fig. 13 is a schematic view of a roller row structure in a transverse track in the construction method of the invention.
FIG. 14 is a schematic view of the construction of prefabricated T beams on piers in the construction method of the present invention.
Wherein:
11. The device comprises a horn, 12, a zero column, 13, a first column, 14, a second column, 15, a third column, 16, a front curved beam, 17 and a rear curved beam;
21. Abutment, 22, front Fang Duntai, 23, prefabricated T-beams, 231, inner side beams, 232, secondary inner side beams, 233, middle beams, 234, secondary outer side beams, 235, outer side beams, 24, support, 25, support bolster, 26, capping beam;
31. steel rail, 32, rolling row, 33 and slide plate;
41. Front rail girder transporting vehicle, 42, rear rail girder transporting vehicle.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention.
In the embodiment, the DJ180 bridge girder erection machine is adopted for construction, the bridge girder erection machine is a single-arm simple support type, full-width mechanical transverse girder sheets can be realized, and the girder can be dropped in place once, and the bridge girder erection machine has the characteristics of simple structure and the like.
Referring to fig. 1, the bridge girder erection machine comprises a machine arm assembly, a curved beam and traversing mechanism, a zero column 12, a first column 13, a second column 14, a third column 15, a first column traversing rail, a second column traversing rail, a hanging beam crane, an electro-hydraulic control system for controlling the movement of each component, and the like.
The horn assembly comprises a horn 11 which is a main bearing structural member of the bridge girder erection machine; the cross section of the box type is adopted, and both sides of the cross section are provided with upper and lower ear beams; the lower part is provided with a rack, and the horn is formed by assembling and connecting five sections of unit beams by using a pin shaft.
The curved beam in the curved beam and the traversing mechanism is a main component for supporting and driving the arm, and comprises a front curved beam 16 and a rear curved beam 17, wherein the front curved beam and the rear curved beam are respectively arranged on an upper cross beam of a first column and a second column and are connected with the arm through an equalizing wheel group. One end of the transverse moving mechanism is connected with the upper part of the curved beam through a bolt, and the other end of the transverse moving mechanism is respectively bolted with the upper cross beams of the first column and the second column. The connection directions of the transverse moving mechanisms of the front curved beam and the rear curved beam are the same, the transverse moving amount of the transverse moving mechanisms in the left-right direction can respectively reach 750mm, and the first column and the second column are driven to transversely move on the first column transverse moving track and the second column transverse moving track.
When the curve beam feeding operation is performed, a traversing oil cylinder on the curve beam at the second column is required to be independently adjusted, so that the prefabricated T Liang Liangpian is prevented from colliding with the second column; however, this causes the first column to deflect, and therefore, it is also necessary to adjust the longitudinal adjustment cylinder at the first column to adjust the first column to a vertical state.
The zero column is arranged at the front end of the horn and adopts a two-stage telescopic and narrow door frame structure; the turnover device can realize turnover in the horizontal direction, and can conveniently turn the zero column to the horizontal position during transportation.
The first column is connected with the front curved beam through an upper cross beam of the first column; the column shaft of the first column adopts two telescopic columns with the adjusting height of 3000mm, and the conventional structure is generally provided with two adjusting joints: 3400mm is used for erecting a flat bridge; one is 1100mm, and is used for erecting a downhill bridge. The first column is arranged on the first column transverse moving rail, and the first column is provided with a travelling mechanism, so that the first column can transversely move on the first column transverse moving rail, and the transverse moving speed is 1.6m/min.
The second column is connected with the rear curved beam through an upper cross beam of the second column; the column body of the second column adopts four two-stage telescopic columns, and the height is adjusted to 3000m; the second column is arranged on the second column transverse moving track, and the second column is also provided with a travelling mechanism, so that the second column can transversely move on the second column transverse moving track, the transverse moving speed is 1.6m/min, and the second column transverse moving tracks are two.
The third column is arranged at the rear end of the horn and is connected with the horn through a frame-shaped connecting bracket; the column body of the third column adopts two columns which can be stretched and contracted in two stages, the adjusting height is 3150m, an adjusting joint of 400mm is arranged in a conventional structure, and the adjusting joint can be used when a slope bridge is erected. In order to meet the requirement of small-curve beam feeding operation, a turnover connection mode is adopted between the third column and the horn, so that the beam feeding device has a backward turnover function, and an oil cylinder is arranged between the horn and the third column to provide power for the turnover of the third column.
The hanging beam travelling crane can be divided into a front hanging beam travelling crane and a rear hanging beam travelling crane according to the arrangement position on the horn, and the front hanging beam travelling crane and the rear hanging beam travelling crane are hung on the ear beam below the horn through the wheel set. The running speed of the crane beam travelling crane on the arm is 5m/min, the crane beam travelling crane is lifted by adopting electric winches, the lifting speed is 0.6m/min, and each electric winch is provided with a 7.5kw braking motor and an electromagnetic brake to realize bipolar braking.
The overhead construction method for erecting a beam by adopting a single-guide beam bridge girder erection machine generally comprises the following steps: loading, transporting, feeding, dropping and traversing.
In the high-speed hub intercommunication of the project, the radius of the ramp bridge is 125m, the radius of the ramp curve is smaller, and when the outer side beam is erected, the bridge girder erection machine cannot transversely move the prefabricated T beam in place; in the construction scheme, a single-guide beam bridge girder erection machine is adopted to fall beams, when an outer edge beam is erected, in order to ensure the safety of the whole bridge girder erection machine and prevent the bridge girder erection machine from overturning, one end of the outer edge beam is positioned on a pier, the other end of the outer edge beam is positioned on a transverse track sliding plate, then a jack is used for erecting the outer edge beam in a construction mode that the other end of the outer edge beam transversely moves to be positioned, and prefabricated T beams at other positions can be erected and constructed by adopting the single-guide beam bridge girder erection machine according to normal construction operation.
Specifically, in this embodiment, for the construction condition that the radius of the high-speed intercommunication ramp is smaller, the adopted construction scheme is as follows:
1) Curve via and in-place operation of bridge girder erection machine
A. When the whole bridge girder erection machine is ready for passing holes, the connection between the curved beam and the arm is released, the front girder erection crane and the first column curved beam are in pin joint, the rear girder erection crane and the second column curved beam are in pin joint, the third column is turned down horizontally, and the first column is supported on the abutment 21 close to the bridge deck; as shown in fig. 2;
b. the third column is retracted, the arm is driven, the third column moves forwards for 9m, the third column is supported at the position of the second column, and the third column is supported as shown in figure 3;
c. the second column is retracted and driven to move forward for 6.5m, and the second column is supported, as shown in figure 4;
d. The third column is retracted, the arm is driven, the third column is moved forward by 2.3m, the zero column reaches the front abutment 22, and the zero column is supported, as shown in fig. 5; before the zero column is supported, the lower cross beam of the zero column is ensured to be parallel to the central line of the front abutment, so that the space occupied by the zero column is reduced, and the levelness of the horn is regulated to be not more than 0.5% according to the actual height of the zero column of the longitudinal slope fulcrum;
e. A third column is supported, a second column is received, the second column is driven to move forwards for 16.6m to a girder erecting position, the second column is supported, the second column is rotated before the second column is supported, and a transverse moving track of the second column is parallel to a front pier, as shown in fig. 6;
f. the first column is collected, the first column is driven to move forwards for 25m to the position of the pier in front, the first column is supported, the first column is rotated before the first column is supported, and the transverse moving track of the first column is parallel to the central line of the pier, as shown in figure 7;
g. And (3) receiving the third column, driving the arm to move forward, adjusting the first column and the second column to move transversely along the first column transverse moving track and the second column transverse moving track respectively, adjusting the bridge girder erection machine arm to enable the bridge girder erection machine arm to be parallel to the prefabricated T beam at the position to be erected, guaranteeing the perpendicularity of the first column in the adjustment process, and adjusting the first column to be in a perpendicular state until the hole passing operation is completed when the perpendicularity of the first column is more than 0.5%.
Because the radius of the ramp curve is smaller, the bent cap 26 of each bridge pier is arranged to be of a fan-shaped structure, and the included angle between the center line of the bent cap and the prefabricated Liang Duanmian degrees; in the girder erection process, a first column transverse rail and a second column transverse rail of the girder erection machine are kept balanced, and an included angle of 5 degrees is formed between the first column transverse rail, the second column transverse rail and the center line of the bent cap when the first column and the second column are arranged in order to meet the requirements of transverse movement of the inner side girder and the outer side girder.
2) Prefabricated T-beam transportation and beam erecting operation
The inner side beam 231, the secondary inner side beam 232, the outer side beam 235 and the secondary outer side beam 234 are erected sequentially according to the girder erection sequence, and finally the middle beam 233 is erected, so that the erection operation of a hole bridge is completed.
The beam transportation of the prefabricated T beam 23 adopts a four-axis rail beam transportation vehicle, and comprises a front rail beam transportation vehicle 41 and a rear rail beam transportation vehicle 42, wherein two ends of the prefabricated T beam respectively fall on movable trays of the two rail beam transportation vehicles during beam transportation, and the prefabricated T beam can rotate relative to the rail beam transportation vehicle on the rail beam transportation vehicle during beam transportation. Transporting the prefabricated T beam to the front end 100m of the bridge girder erection machine, arranging a double-row girder lifting portal at the front 100m of the bridge girder erection machine, paving a track at the position close to the 50m of the bridge girder erection machine, and arranging a track girder transporting vehicle above the track; the rail beam transporting vehicles also need to meet the requirement of reducing the beam feeding height of the bridge girder erection machine in girder erection construction, and the height of the two rail beam transporting vehicles is 0.65m.
When the precast T beam is transported to the lower part of the beam lifting door frame during beam loading and transporting operation, the precast T beam is lifted to the rail beam transporting vehicle by the beam lifting door frame, the gravity center of the precast T beam is required to fall on the longitudinal center line of the rail beam transporting vehicle, and the deviation is not more than 20mm; when the prefabricated T beam falls on the rail beam transporting vehicle, the front end of the prefabricated T beam does not exceed the supporting cross beam of the rail beam transporting vehicle by 2.5m, and the upper end of the inclined support of the rail beam transporting vehicle is required to be padded with hard miscellaneous wood or rubber belts to be in perfect contact with the beam piece, so that the inclined support is supported and locked tightly to protect the beam piece concrete; before transporting the beam, the steel wire rope of the binding beam piece is tensioned and locked, and the contact point of the steel wire rope and the beam piece is lined with rubber to protect the concrete of the beam body and the binding Liang Gangsi rope to be intact, so that the safe transportation of the prefabricated T-beam is ensured.
The prefabricated T beam adopts a hoisting method of arranging a hoisting hole to penetrate the beam bottom of the beam pocket. The bottom-holding lifting mode is adopted, steel wire ropes penetrate through the prefabricated T beam bottom plate at lifting points at two ends of the beam body, and after the steel wire ropes bypass the prefabricated T beam wing plates, the steel wire ropes are clamped into clamping rings at the top ends of lifting appliances. Because the radius of the ramp curve is smaller, the dimension deviation of the wing plates of the boundary beams at the two sides of the prefabricated T-shaped beam is larger, in order to ensure the hoisting stability of the boundary beams, hoisting holes are reserved at the two sides of the web plate of the boundary beams when the boundary beams are prefabricated, so that the hoisting stability of the boundary beams is ensured.
3) Feeding and dropping beam operation
A. front hanging beam traveling crane hanging beam;
Referring to fig. 8, the third column is horizontally turned to the rear, the track beam transporting vehicle transports the prefabricated T beam to the rear of the second column, the bridge girder erection machine is adjusted to realize the whole machine transverse movement, the front hanging beam travelling crane is positioned right above one end of the prefabricated T beam, and at the moment, the distance between the front hanging beam travelling crane and the transverse movement track of the second column is about 3.5 m;
Lifting beam pieces of the front lifting beam crane, and keeping the inclination angle of the beam pieces not larger than 20 degrees; then the front hanging beam crane and the rear track beam transport vehicle simultaneously advance to match the speed of the track beam transport vehicle; in the advancing process, the track of the horn is moved by the front hanging beam crane, and the track of the prefabricated T beam is moved by the rear track beam crane, so that the transverse movement of the whole machine is adjusted to adjust the position of the prefabricated T beam in the process, and the prefabricated T beam and the column body of the second column are prevented from being scratched. Meanwhile, in the adjustment process, the perpendicularity (not more than 0.5%) of the first column is guaranteed, and the longitudinally moving oil cylinder above the curved beam of the first column is adjusted in time after the first column is inclined, so that the perpendicularity of the first column is adjusted.
B. A rear hanging beam travelling crane hanging beam;
referring to fig. 9, when the rear rail girder carrier reaches the lifting position of the rear girder carrier, the other end of the prefabricated T-beam is lifted by the rear girder carrier and lifted, so that the prefabricated T-beam is in a horizontal state, at this time, the front girder carrier and the rear girder carrier simultaneously move forward, and the position of the second column is transversely adjusted in the moving process, so that the prefabricated T-beam smoothly passes through the second column.
C. Erecting inner side beams and secondary inner side beams;
Referring to fig. 10, when an inner side beam is erected, in order to ensure the stability of the whole bridge girder erection machine, the bridge girder erection machine is prevented from overturning, the center points of a first column and a second column of the bridge girder erection machine on corresponding transverse moving tracks cannot exceed a stop block of a bent beam and the outermost edge of a bridge deck, and side overturning of the bridge girder erection machine caused by external detection of the bridge girder erection machine is avoided, so that in the girder falling process, the transverse moving tracks of the first column and the second column should be transversely moved in place, and after the transverse moving track wheels of the first column and the second column are locked, the transverse moving cylinders of the bent beam are adjusted to accurately position, so that girder erection safety is ensured.
When the transverse moving rail wheel of the first column reaches the most edge of the capping beam, the distance between the transverse moving rail wheel of the second column and the most edge of the bridge deck is 22cm, the positions of the center line of the curved beam and the center line of the support meet the beam falling requirement, and the inner side beam can be directly transversely moved into position by the bridge girder erection machine.
After the inner side beam is erected, the secondary inner side beam is erected, and then transverse partition plate steel bars between two prefabricated T beams are welded, so that the stability of the beam body is ensured.
D. Erection of outer side beam and secondary outer side beam
Referring to fig. 11, when the outer beam is erected, the transverse rail wheel of the first column of the bridge girder erection machine moves to the most edge of the bent beam at the second column, and the distance between the center line of the bent beam at the second column and the center line of the bent beam support is 49cm, so that the prefabricated T-beam sheet cannot be dropped on the support filler. In order to ensure the safety of the bridge girder erection machine, the prefabricated T beam at one end of the first column is temporarily dropped on the support cushion, the prefabricated T beam at one end of the second column is dropped on the transverse track, and the jack is matched and transversely moved to be in position.
As shown in fig. 12 and 13, the transverse track adopts a No. 43 steel rail 31, a roller row 32 and a sliding plate 33 are sequentially arranged on the steel rail 31, and the roller row is processed by adopting 50cm round steel and 2cm steel plates; one end of a prefabricated T beam to be erected is placed on the sliding plate; and stably fixing the prefabricated T beam on the sliding plate, performing transverse movement operation on the prefabricated T beam by adopting a 15T jack, and synchronously positioning the prefabricated T Liang Xiela to a beam-erecting position by adopting two QYL 32-ton jacks after the transverse movement is in place.
The specific pushing construction operation comprises the following steps: and placing the prefabricated T beam on a sliding plate, in the pushing process, the backing plate needs to follow the backing plug in time, calculating the pivot counter force according to the prefabricated T Liang Zhongliang to predict the horizontal pushing, gradually increasing the pushing force according to the required pushing force until the beam body starts to move forward, and properly reducing the pushing force of the jack after the beam body starts to move so as to enable the beam body to push forward in a balanced manner.
In the pushing process of the beam body, along with the pushing of the beam body, the lateral limit control center line offset is within 10mm, in the pushing process of the T beam, the offset of each abutment and the center line position of the beam body are tracked and measured, the pushing speed is controlled, a limit device is arranged between a slideway of a transverse track and the abutment top, larger movement is prevented from being generated during the pushing, a hard wood block is adopted between the limit device and the abutment top to fill in tightly, and the transverse moving distance is prevented from exceeding the center line position of the abutment support.
The specific beam falling construction operation comprises the following steps: after the prefabricated T beam is transversely pushed into place, the prefabricated T beam is lifted by a jack, a transverse track is pulled out, after Liang Tiding is lifted in place, a jack oil valve is locked, longitudinal and transverse position deviation of the prefabricated T beam is rechecked, a support 24 is mounted on a support cushion 25, the jack is slowly depressurized, and the prefabricated T Liang Huanman falls onto the support 24. Referring to fig. 14, a schematic diagram of the construction of prefabricated T beams on piers is shown.
After the erection of the outer beam is completed, the secondary outer beam is erected, and two diaphragm plate reinforcing steel bars of the two precast beams are welded, so that the stability of the beam body is ensured.
E. Middle beam frame
The beam falling speed is slowed down in the middle beam erection process, and the beam body overturning caused by collision between the middle beam and other beam sheets is prevented.
After the middle beam is erected, a bridge deck system is timely constructed, and then the erection construction of the next hole beam is carried out.
When the beam is in place, the precast T Liang Duiwei is carried out by aligning the hanging hammer with the filler cross line according to the central line of the support plate led out by the end head of the precast T beam, and when the longitudinal central line alignment and the end line alignment of the precast T beam conflict, the central line of the support is used as the standard, and the rubber support is tightly attached to the steel plate at the bottom of the beam after the beam is in place.
In the description of the present invention, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are used to indicate orientations or positional relationships based on those shown in the drawings, or those that are conventionally put in use in the product of the present invention, they are merely used to facilitate description of the present invention and simplify description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "horizontal," "vertical," and the like in the description of the present invention, if any, do not denote absolute levels or overhangs, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent variation, etc. of the above embodiment according to the technical matter of the present invention fall within the scope of the present invention.
Claims (10)
1. The construction method for the high-speed intercommunicating small-curve girder erection is characterized in that a single-guide girder bridge girder erection machine is adopted to erect a precast girder, and comprises a machine arm, a curved girder, a zero column, a first column, a second column, a third column, a hanging girder crane, a first column transverse moving track and a second column transverse moving track, wherein the curved girder comprises a front curved girder and a rear curved girder, and the hanging girder crane comprises a front hanging girder crane and a rear hanging girder crane;
The girder erection construction method comprises the following steps:
performing hole passing operation on the bridge girder erection machine; the method comprises the steps of supporting a first column to a front abutment and supporting a second column on a bridge deck close to the abutment;
Feeding and dropping beams; the front hanging beam crane and the rear hanging beam crane hoist the precast beam, and the whole bridge girder erection machine is controlled to transversely move to the girder erection position and then fall down;
In the beam falling operation, when the inner side beam is erected, the center points of the first column and the second column on the corresponding first column transverse moving track and the second column transverse moving track are not more than the corresponding pier capping beam stop block and the outermost edge of the bridge deck; in the beam falling process, the transverse moving rails of the first column and the second column are transversely moved in place, the transverse moving rail wheels of the first column and the second column are locked, and then the hoisted precast beam is adjusted to the beam erecting position through an adjusting curved beam transverse moving cylinder;
When an outer side beam is erected, a first column transverse rail wheel is moved to the most edge of a cover beam, then a precast beam at one end of the first column is temporarily dropped on a support cushion stone corresponding to a pier, a transverse rail is arranged on the pier close to a bridge deck, a precast beam at one end of a second column is dropped on the transverse rail, and then the precast beam is pushed and transversely moved to a beam erecting position and then dropped;
In the girder erecting process, when a first column and a second column are arranged, an included angle of 5 degrees is formed between the first column transverse moving rail, the second column transverse moving rail and the center line of the bent cap.
2. The construction method for the high-speed interworking small curve girder erection according to claim 1, wherein the girder dropping operation step of the outer side girder comprises the steps of:
After the outer beam is transversely pushed to the beam falling position, the prefabricated beam is lifted by a jack, an oil valve of the jack is locked, a transverse rail is pulled out, a support is mounted on a support backing stone, then the jack is slowly depressurized, and the prefabricated beam falls onto a corresponding support.
3. The construction method of the high-speed intercommunicating small curve girder according to claim 1, wherein the transverse track comprises steel rails, rolling bars arranged on the steel rails and sliding plates arranged on the rolling bars, and one end of the outer girder is dropped on the sliding plates of the transverse track;
the jack is adopted to transversely push the peripheral beam, in the pushing process, the pushing force is gradually increased according to the required pushing force until the precast beam starts to move, and the pushing force of the jack is reduced after the precast beam starts to move.
4. The method for constructing the high-speed interworking small curve girder erection according to claim 1, wherein the bridge girder erection machine via hole operation comprises the following steps:
a. Connecting a front frame girder crane with a front curved girder, connecting a rear frame girder crane with a rear curved girder, horizontally turning down a third column, and supporting a first column on a pier adjacent to a bridge deck;
b. The third column is collected, the third column is moved forward to a position close to the second column by the driving arm, and the third column is supported;
c. the second column is collected and driven to move forwards for a certain distance, and the second column is supported;
d. The third column is collected, the driving arm moves forwards to the zero column to reach the position of the front abutment, and the lower cross beam of the zero column is ensured to be parallel to the central line of the front abutment before the zero column is supported;
e. a third column is supported, a second column is received, the second column is driven to move forwards to a girder supporting position, the second column is supported, and the second column is rotated before the second column is supported, so that a transverse moving track of the second column is parallel to a front abutment;
f. the first column is collected, the first column is driven to move forward to the position of the front abutment, the first column is supported, and the first column is rotated before the first column is supported, so that a transverse moving track of the first column is parallel to the central line of the abutment;
g. and (3) receiving the third column, driving the arm to move forward, adjusting the first column and the second column to enable the first column and the second column to move transversely along the first column transverse moving track and the second column transverse moving track respectively, and adjusting the bridge girder erection machine arm to enable the bridge girder erection machine arm to be parallel to the prefabricated T beam at the position to be erected.
5. The construction method of the high-speed intercommunication small curve girder erection according to claim 4, wherein the levelness of the horn is adjusted in the process of the via hole operation of the bridge girder erection machine, so that the levelness of the horn is always not more than 0.5%; when the zero column and the first column are supported, the verticality of the zero column and the first column is adjusted to be always not more than 0.5 percent.
6. The construction method of the high-speed intercommunication small curve girder erection according to claim 4, wherein an included angle of 3-5 degrees is formed between the first column and the second column and the center line of the capping girder of the corresponding abutment when the first column and the second column are arranged in the operation of the via hole of the bridge girder erection machine.
7. The construction method of the high-speed intercommunicating small curve girder according to claim 6, wherein the bent cap of each bridge pier is arranged to be a fan-shaped structure, so that an included angle of 3-5 degrees is formed between the center line of the bent cap and the prefabricated Liang Duanmian degrees.
8. The construction method for the high-speed intercommunicating small curve girder erection according to claim 1, wherein the girder erection is sequentially an inner girder, a secondary inner girder, an outer girder, a secondary outer girder and a middle girder, and the erection operation of a hole bridge is sequentially completed.
9. The construction method for the high-speed interworking small curve girder erection according to claim 8, wherein the secondary girder is erected after the girder erection is completed, and then the diaphragm reinforcement between the two prefabricated girders is welded.
10. The construction method for the high-speed intercommunicating small curve girder erection according to claim 8, wherein the secondary outer girder is erected after the outer girder is erected, and then the diaphragm reinforcement between the two prefabricated girders is welded.
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| CN106836000A (en) * | 2017-04-06 | 2017-06-13 | 中铁六局集团有限公司 | Curve via holes Summarized Account of Bridge Erection Construction method based on DJ series Bridge Erectors |
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| CN106480828A (en) * | 2016-12-16 | 2017-03-08 | 四川公路桥梁建设集团有限公司 | Small-radius curve T-shaped beam bridge erecting machine and rotary installation construction method |
| CN107675630A (en) * | 2017-09-09 | 2018-02-09 | 中建八局第三建设有限公司 | A kind of overhead prefabricated box girder erection device of light rail and its construction method |
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| CN106836000A (en) * | 2017-04-06 | 2017-06-13 | 中铁六局集团有限公司 | Curve via holes Summarized Account of Bridge Erection Construction method based on DJ series Bridge Erectors |
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| 单导型架桥机架设120m小半径曲线T梁施工技术;胡宝春;石虎强;;西南公路;20160520(02);第160-166页 * |
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