CN111608089A - Large longitudinal slope integral bridge girder erection machine over-span construction method and construction system - Google Patents
Large longitudinal slope integral bridge girder erection machine over-span construction method and construction system Download PDFInfo
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- CN111608089A CN111608089A CN202010516211.6A CN202010516211A CN111608089A CN 111608089 A CN111608089 A CN 111608089A CN 202010516211 A CN202010516211 A CN 202010516211A CN 111608089 A CN111608089 A CN 111608089A
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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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Abstract
The invention discloses a large longitudinal slope integral bridge girder erection machine cross-span construction method and a construction system, wherein a bridge girder erection machine (1) is arranged on a bridge floor, the front half part of the bridge girder erection machine (1) is arranged at a position where a combined beam pier is to be placed, the rear half part of the bridge girder erection machine (1) is arranged on the bridge floor where the combined beam is placed, a far-end pier (01) is to be placed, a near-end pier (02) is to be placed, the center position of the first bridge floor, and the inner side end part of the first bridge floor are respectively provided with a temporary support (2), a front support leg (11), a middle support leg (12) and a tail support leg (13), front, middle and rear counter weights are adjusted in a hole passing process to keep balance, anchoring measures are added, a construction method flow is optimized, and the gravity center. The bridge girder erection machine solves the problems that the bridge girder erection machine is heavy in weight and inclined slippage is easy to occur in the process of erecting the via hole on the large longitudinal slope bridge.
Description
Technical Field
The invention relates to the field of bridge construction, in particular to a construction method and a construction system of a longitudinal slope bridge girder erection machine.
Background
The steel-concrete combined beam bridge is a bridge structure form which connects a steel beam and a concrete bridge deck into a whole through a shear connector and considers common stress. Compared with a pure steel beam which is not designed according to the composite beam, the composite beam bridge can adopt a steel beam with a smaller section. And the section inertia moment of the combined beam is obviously increased compared with that of the steel beam, so that the deflection of the structure under live load can be reduced.
The existing construction mode of the composite beam is generally paved by using a bridge girder erection machine which is heavy and easy to incline and slide in the process of erecting a via hole on a large longitudinal slope bridge.
The patent CN201710764563.1 provides a girder erection method and a bridge girder erection machine for a large longitudinal slope working condition, wherein the bridge girder erection machine completes the uphill erection under the working condition that the maximum longitudinal slope exceeds 6% through continuous steps of front supporting leg lifting, rear supporting leg jacking, rear auxiliary supporting leg heightening, via hole carrier roller hanging, whole machine adjusting movement, overhead crane sliding, whole machine lifting, rear auxiliary supporting leg oil cylinder withdrawing, via hole carrier roller disengaging, rear supporting leg anchoring, T-shaped girder erection and the like. The upper portion of the front supporting leg is provided with the supporting roller box group, power is provided for the through hole of the main beam, the main beam is connected with the square column in a slipknot mode, a flexible structure is formed, and the problem of beam erection under the working condition of a large longitudinal slope is solved.
But it is big for can solving under the big longitudinal slope operating mode bridge girder erection machine is from the weight, easily takes place the problem of slope slip in big longitudinal slope bridge erection via hole process.
A longitudinal slope integral type bridge girder erection machine over-span construction system and a method are needed at present, and are used for solving the problem of inclined sliding of a large longitudinal slope.
Disclosure of Invention
The invention provides a large longitudinal slope integral bridge girder erection machine over-span construction system and method, aiming at solving the problems that in the prior art, a bridge girder erection machine is heavy in weight under the working condition of a large longitudinal slope and inclined slippage is easy to occur in the process of erecting a via hole on a large longitudinal slope bridge.
The invention provides a large longitudinal slope integral bridge girder erection machine over-span construction method, which comprises the following steps:
s1, arranging a bridge girder erection machine on the bridge floor, arranging the front half part of the bridge girder erection machine at the position of the pier of the composite girder to be placed, arranging the rear half part of the bridge girder erection machine on the bridge floor of the placed composite girder, and arranging a temporary support, a front support leg, a middle support leg and a tail support leg at the far-end pier to be placed, the near-end pier to be placed, the center position of the first bridge floor and the inner side end part of the first bridge floor respectively;
s2, anchoring the bridge girder erection machine at the bridge floor position through a chain block, conveying the combined girder into the lower part of the bridge girder erection machine by a trolley, and connecting the front end of the combined girder with a rear overhead crane of the bridge girder erection machine;
s3, disassembling the tail supporting leg cushion block, and arranging a supporting leg in the position where the combined beam pier is to be placed;
s4, removing cushion blocks of the front supporting leg and the middle supporting leg;
s5, moving the front supporting legs forwards to the far-end bridge pier to be placed and supporting the bridge girder erection machine;
s6, transporting the combined beam to the lower part of the bridge girder erection machine through two groups of beam transporting trolleys, and opening the front end of the front beam transporting trolley to the position of the middle support leg;
s7, hoisting the front end of the combined beam by a crown block at the front end of the bridge girder erection machine, and withdrawing the front beam carrying trolley from the construction site;
s8, the rear girder transporting trolley and the crown block at the front end of the bridge girder erection machine move forwards simultaneously, when the rear girder transporting trolley is driven to the position of the middle supporting leg, the crown block at the rear end of the bridge girder erection machine lifts the rear end of the combined girder, and the rear girder transporting trolley exits from the construction site;
s9, moving the front end crown block and the rear end crown block forwards to positions above a far-end pier to be placed and a near-end pier to be placed;
s10, dropping beams of the front end crown block and the rear end crown block;
s11, repeating the steps 1-10 until the installation of the other composite beams to be installed is finished;
and S12, mounting steel transverse supports and end cross beams among the composite beam trusses.
The bridge girder erection machine is arranged on a bridge floor in a way that a temporary support is supported on a far-end pier to be placed, a front support leg is supported on a near-end pier to be placed, a middle support leg is supported in the middle of a first bridge-spanning floor, a tail support leg is supported at the end part of the first bridge-spanning floor, and a main girder of the whole bridge girder is fixed by four groups of five-ton inverted chains. The whole idea is that the height of the whole machine is firstly reduced, after the middle supporting leg is in place, the front supporting leg cylinder is retracted to be emptied and then flatly rolled to the next working position, the screw top at the lower part of the front supporting leg is screwed out, the cylinder is jacked, and the main beam is adjusted to be horizontal. When the girder is erected, in order to prevent the girder of the bridge girder erection machine from moving and ensure safety, the girder of the bridge girder erection machine and the erected bridge face are anchored.
The pier to be placed at the far end and the pier to be placed at the near end respectively refer to the pier at the far position and the pier at the near position of the composite beam to be placed, wherein the composite beam to be placed is a beam component.
The trolley transporting beam enters the lower part of the bridge girder erection machine, and the front end of the combined beam is connected with the rear overhead crane as a balance weight
The invention relates to a large longitudinal slope integral bridge girder erection machine over-span construction method, and as a preferred mode, the step S3 comprises the following steps:
s31, retracting the tail supporting leg jacking oil cylinder;
s32, removing the cushion blocks of the tail supporting legs;
s33, ejecting the tail supporting leg jacking oil cylinder until the middle supporting leg is suspended;
s34, starting the middle support leg to shake and roll, and moving the middle support leg forwards to the position above the cushion block at the front end of the beam;
and S35, retracting the lifting cylinders of the front supporting leg and the tail supporting leg, and supporting the middle supporting leg on the cushion block.
The tail support leg jacking oil cylinder is retracted, and the stress of the rear support leg is converted into that of the middle support leg; and the tail supporting leg jacking oil cylinder is ejected out, and the middle supporting leg is suspended.
The invention relates to a large longitudinal slope integral bridge girder erection machine over-span construction method, and as a preferred mode, the step S4 comprises the following steps:
and S41, retracting the front supporting leg jacking oil cylinder, emptying the front supporting leg, and converting the front supporting leg into the middle supporting leg under the stress.
And S42, removing the front leg cushion block.
And S43, ejecting the front supporting leg jacking oil cylinder, emptying the middle supporting leg, and transferring the stress to the front supporting leg.
And S44, removing the cushion block below the middle support leg.
The front supporting leg jacking oil cylinder retracts, the front supporting leg is emptied, and the front supporting leg is converted into the middle supporting leg under the stress; the jacking oil cylinder of the front supporting leg is ejected out, the middle supporting leg is emptied, and the stress is transferred to the front supporting leg.
The invention relates to a large longitudinal slope integral bridge girder erection machine over-span construction method, and as a preferred mode, the step S5 comprises the following steps:
s51, retracting the front support leg jacking oil cylinder, and suspending the front support leg;
and S52, starting the front support leg to swing and roll, and moving the front support leg forwards to the position above the far-end pier to be placed.
And S53, ejecting the jacking oil cylinder of the front supporting leg, and supporting the front supporting leg on the pier of the far-end pier to be placed.
The invention provides a large longitudinal slope integral bridge girder erection machine cross-span construction system which comprises a bridge girder erection machine, nylon hanging strips, a chain block, two girder transporting trolleys and temporary supports, wherein the front end of the bridge girder erection machine is arranged above two piers of a composite girder to be placed, the rear end of the bridge girder erection machine is arranged on a first bridge girder erection panel, the foremost position of the bridge girder erection machine is arranged right above a far-end pier of the pier to be placed, the temporary supports are arranged at the upper end of the far-end bridge to be placed and support the bridge girder erection machine, the chain block anchors the bridge girder erection machine on the bridge girder erection panel through the nylon hanging strips, and the two girder transporting trolleys are arranged on the bridge girder erection panel and are positioned below the rear end of the.
The invention relates to a large longitudinal slope integral bridge girder erection machine cross-span construction system, which is characterized in that a beam transporting trolley group comprises a beam transporting trolley and a rear beam transporting trolley, a combination beam to be placed is arranged between the front beam transporting trolley and the rear beam transporting trolley, the front beam transporting trolley is arranged at the front end of a first cross-span bridge deck, and the rear beam transporting trolley is arranged at the rear end of the front beam transporting trolley.
According to the large longitudinal slope integral bridge girder erection machine over-span construction system, as an optimal mode, the front end of the front girder transporting trolley and the front end of the rear girder transporting trolley are provided with the inclined battens for preventing sliding down and sliding down.
When the beam carrying trolley carries the beam to the bridge floor and walks on 4% of longitudinal slopes, inclined battens with the section of 200 x 200 are prepared in advance for ensuring reliable braking, and the inclined battens are used for shoveling at any time in emergency so as to prevent sliding down and sliding.
According to the large longitudinal slope integral bridge girder erection machine over-span construction system, as an optimal mode, main girders on two sides of the bridge girder erection machine are anchored by the chain block and the nylon hanging strip, and four anchoring points are arranged on a bridge deck by the chain block and the nylon hanging strip.
The invention relates to a large longitudinal slope integral type bridge girder erection machine cross-span construction system, which comprises a front support leg, a middle support leg and a tail support leg in a preferable mode, wherein the front support leg is arranged in the middle of the bridge girder erection machine, the middle support leg is arranged in the middle of the rear end of the bridge girder erection machine, the tail support leg is arranged at the tail of the bridge girder erection machine, and the front support leg, the middle support leg and the tail support leg are respectively supported at the center of a first cross-bridge floor and the inner side end of the first cross-bridge floor to be placed.
The invention relates to a large longitudinal slope integral bridge girder erection machine over-span construction system.
The front temporary support comprises a jacking oil cylinder and is temporarily supported on the next pier along with the main beam when the bridge passes through the hole; the front supporting leg comprises an upper cross beam, a jacking oil cylinder, a transverse moving oil cylinder, a longitudinal moving oil cylinder and a lower cross beam (comprising an adjusting screw rod), wherein the jacking oil cylinder is used for adjusting the height, the transverse moving oil cylinder is used for no-load steering of the whole machine, and the longitudinal moving oil cylinder is used for adjusting the position of the lower cross beam of the front supporting leg; the middle supporting leg comprises an upper cross beam, a transverse moving oil cylinder, a universal adjusting device and a lower cross beam (comprising an adjusting screw rod), the transverse moving oil cylinder is used for no-load steering of the whole machine, and the universal adjusting device is used for adjusting the transverse and longitudinal positions; the tail supporting leg comprises a jacking oil cylinder, a lower cross beam and a transverse oil cylinder, the jacking oil cylinder is used for adjusting the height, the tail supporting leg can be freely supported at the position of the lower cross beam, and the transverse oil cylinder is used for adjusting the position of the lower cross beam of the tail supporting leg.
When the bridge girder erection machine moves longitudinally, the front supporting leg and the middle supporting leg bear the main load of the bridge girder erection machine, and the front supporting leg and the jacking oil cylinder of the tail supporting leg are matched with the front temporary support, and the whole longitudinal movement is completed by the rolling mechanism. When the bridge girder erection machine is steered in the idle-load transverse moving mode, the front supporting leg and the middle supporting leg bear the main load of the bridge girder erection machine, the front temporary support and the tail supporting leg are in a suspended state, when the current supporting leg is transversely moved, the two crown blocks are opened towards the front supporting leg accessory, the girder truss drives the middle supporting leg to complete steering, when the middle supporting leg is transversely moved, the two crown blocks are opened towards the middle supporting leg accessory, and the girder drives the front supporting leg to complete steering. The front supporting leg and the middle supporting leg are provided with independent running mechanisms, can move forwards, backwards, leftwards and rightwards automatically, and are convenient and quick to operate.
The number of the bridge girder erection machine hoisting crown blocks is 2, and the hoisting capacity of a single crane is designed according to 140 tons. The crane crown block comprises a longitudinal moving flat car and a transverse moving trolley, the longitudinal moving flat car realizes longitudinal moving of the crown block, the transverse moving trolley realizes one-time in-place of a crown block edge beam, and the beam taking mode of the bridge girder erection machine can adopt tail beam taking.
The rocking flat roller consists of a speed reducer, a motor, a rocking roller gear assembly, a flat roller gear assembly, a gap bridge gear assembly, a guide roller assembly, a transmission shaft assembly, a rack and the like. For effecting longitudinal movement.
The invention has the following beneficial effects:
(1) the temporary support is arranged to complete the balance and gravity center transfer of the bridge girder erection machine, so that the problem that the bridge girder erection machine is heavy in weight and easy to incline and slide in the process of erecting a large longitudinal slope bridge through a hole is solved;
(2) the bridge girder erection machine fully considers the influence of the gradient during construction, and the safety factor is ensured;
(3) the beam body and the bridge girder erection machine are used as balance weights, so that the applicability is strong, the requirement on a mechanical structure is low, and the repeatable implementation performance is strong;
(4) when the girder is erected, in order to prevent the girder of the bridge girder erection machine from moving and ensure safety, the girder of the bridge girder erection machine and the bridged surface are anchored through the chain block.
Drawings
FIG. 1 is a flow chart of a large longitudinal slope integral bridge girder erection machine over-span construction method;
FIG. 2 is a flow chart of a step S3 of a large longitudinal slope integral bridge girder erection machine over-span construction method;
FIG. 3 is a flow chart of a step S4 of a large longitudinal slope integral bridge girder erection machine over-span construction method;
FIG. 4 is a flow chart of a step S5 of a large longitudinal slope integral bridge girder erection machine over-span construction method;
FIG. 5 is a schematic view of a large longitudinal slope integral bridge girder erection machine over-span construction system;
FIG. 6 is a schematic view of a girder transporting trolley of a large longitudinal slope integrated bridge girder erection machine over-span construction system;
FIG. 7 is a schematic view of a bridge girder erection machine of a large longitudinal slope integral bridge girder erection machine over-span construction system.
Reference numerals:
1. a bridge girder erection machine; 11. a front leg; 12. a middle support leg; 13. a tail leg; 14. a bridge girder erection machine body; 2. temporary support; 3. a nylon sling; 4. chain rewinding; 5. a beam transporting trolley; 51. a front beam trolley; 52. a rear girder trolley; 01. a far-end pier is to be placed; 02. and placing the near-end pier.
Detailed Description
The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
Example 1
As shown in figure 1, the large longitudinal slope integral bridge girder erection machine over-span construction method comprises the following steps:
s1, arranging a bridge girder erection machine 1 on a bridge floor, arranging the front half part of the bridge girder erection machine 1 at the position of a composite beam pier to be placed, arranging the rear half part of the bridge girder erection machine 1 on the bridge floor on which the composite beam is placed, and arranging a temporary support 2, a front support leg 11, a middle support leg 12 and a tail support leg 13 at the end part of the far-end pier 01 to be placed, the near-end pier 02 to be placed, the center position of a first bridge floor and the inner side of the first bridge floor respectively;
s2, anchoring the bridge girder erection machine 1 at the bridge floor position through a chain block 4, conveying a combined beam into the lower part of the bridge girder erection machine 1 by a trolley, and connecting the front end of the combined beam with an overhead traveling crane of the bridge girder erection machine 1;
s3, disassembling the cushion block of the tail supporting leg 13, and arranging the supporting leg 12 in the position where the combined beam pier is to be placed;
as shown in fig. 2, step S3 specifically includes:
s31, retracting the jacking oil cylinder of the tail supporting leg 13;
s32, removing the cushion blocks of the tail supporting legs 13;
s33, ejecting the jacking oil cylinder of the tail supporting leg 13 until the middle supporting leg 12 is suspended;
s34, starting the middle supporting leg 12 to shake and roll, and moving the middle supporting leg 12 forwards to the position above a pad at the front end of the beam;
and S35, the oil lifting cylinders of the front supporting leg 11 and the tail supporting leg 13 are retracted, and the middle supporting leg 12 is supported on the cushion block.
S4, removing cushion blocks of the front supporting leg 11 and the middle supporting leg 12;
as shown in fig. 3, step S4 specifically includes:
and S41, retracting the jacking oil cylinder of the front supporting leg 11, emptying the front supporting leg 11 and switching the stress of the front supporting leg 11 to the stress of the middle supporting leg 12.
And S42, removing the cushion block of the front leg support 11.
S43, ejecting the jacking oil cylinder of the front supporting leg 11, and releasing the middle supporting leg 12 to transfer the stress to the front supporting leg 11.
And S44, removing a cushion block below the middle supporting leg 12.
S5, moving the front supporting leg 11 forwards to the position where the far-end pier 01 is to be placed and supporting the bridge crane 1;
as shown in fig. 4, step S5 specifically includes:
s51, retracting the jacking oil cylinder of the front supporting leg 11, and suspending the front supporting leg 11;
and S52, starting the front leg support 11 to roll and move the front leg support 11 forward to the position above the remote pier 01 to be placed.
And S53, ejecting the jacking oil cylinder of the front supporting leg 11, and supporting the front supporting leg 11 on the pier 01 of the far-end pier to be placed.
S6, transporting the combined beam to the lower part of the bridge girder erection machine 1 through the two beam transporting trolley groups 5, and opening the front end of the front beam transporting trolley group 51 to the position of the middle support leg 12;
s7, hoisting the front end of the combined beam by a crown block at the front end of the bridge girder erection machine 1, and withdrawing the front beam trolley group 51 from the construction site;
s8, the rear girder transporting trolley group 52 and a crown block at the front end of the bridge girder erection machine 1 move forwards simultaneously, when the rear girder transporting trolley group 52 is opened to the position of the middle supporting leg 12, the crown block at the rear end of the bridge girder erection machine 1 lifts the rear end of the combined girder, and the rear girder transporting trolley group 52 exits from the construction site;
s9, moving the front end crown block and the rear end crown block forwards to positions above the far-end pier 01 to be placed and the near-end pier 02 to be placed;
s10, dropping beams of the front end crown block and the rear end crown block;
s11, repeating the steps 1-10 until the installation of the other composite beams to be installed is finished;
and S12, mounting steel transverse supports and end cross beams among the composite beam trusses.
As shown in figure 5, the integral bridge girder erection machine of big longitudinal slope strides construction system, including bridge girder erection machine 1, nylon suspender 3, the back chain 4, two fortune roof beam platform truck group 5, support 2 temporarily, the front end of bridge girder erection machine 1 sets up in treating two piers of placing the combination beam top, the rear end of bridge girder erection machine 1 sets up on first bridge deck of striding, bridge girder erection machine 1 foremost position sets up and treats to place far-end pier 01 directly over at the pier, support 2 temporarily and set up in treating to place far-end bridge upper end and support frame bridge girder erection machine 1, the back chain 4 passes through nylon suspender 3 and anchors bridge girder erection machine 1 on the bridge deck, two fortune roof beam platform truck group 5 sets up on the bridge deck and are located bridge girder erection machine 1 rear end below. The main beams at two sides of the bridge girder erection machine 1 are anchored by the chain block 4 and the nylon hanging strip 3, and the chain block 4 and the nylon hanging strip 3 are provided with four anchoring points on a bridge deck.
As shown in fig. 6, the two girder transporting trolley sets 5 include a front girder transporting trolley set 51 and a rear girder transporting trolley set 52, a composite girder to be placed is arranged between the front girder transporting trolley set 51 and the rear girder transporting trolley set 52, the front girder transporting trolley set 51 is arranged at the front end of the first bridge-spanning panel, and the rear girder transporting trolley set 52 is arranged at the rear end of the front girder transporting trolley set 51. The front end of the transportation quantity trolley is also provided with an oblique batten for preventing the sliding down and sliding down.
As shown in fig. 7, the bridge girder erection machine 1 includes a bridge girder erection machine body 14, a front leg 11, a middle leg 12 and a tail leg 13, wherein the front leg 11 is disposed in the middle of the bridge girder erection machine body 14, the middle leg 12 is disposed in the middle of the rear end of the bridge girder erection machine body 14, the tail leg 13 is disposed at the tail of the bridge girder erection machine body 14, and the front leg 11, the middle leg 12 and the tail leg 13 are respectively supported at the end of the inner side of the first bridge girder, where the near-end pier 02 is to be placed, the center of the first bridge girder. The front support leg 11, the middle support leg 12 and the tail support leg 13 are all provided with hydraulic jacks.
The material and the manufacturing precision of the support seat meet the design requirements, and finished product qualification certificates of a manufacturing factory are provided, and a casting flaw detection record, a defect repair welding record and a support adherence inspection record are attached. At the same time, the appearance inspection is carried out on the spot and the contour dimension after the assembly is rechecked. The quality standard and the inspection method of the steel beam support are executed according to the specification of 'temporary standard for checking and accepting construction quality of railway bridges and culverts of passenger special lines' iron construction No. 2005]160 and checking and accepting of the novel support. Before the support is installed, the span of a bridge, the position of the support, the position and the size of a reserved anchor bolt hole, the height and the flatness of the top surface of the supporting cushion stone are checked and all the requirements of design are met. When the support anchor bolt is installed, careful checking must be carried out according to an anchor bolt assembly drawing, and neglected installation is strictly prohibited. The process of checking, assembling and installing the support in the field is required to be checked and visa by a construction site supervisor.
The fixed support installation should be according to design mileage and the fixed support center mileage of each mound span adjustment of girder steel after confirming, when adjusting a allies oneself with the girder steel, should make the fixed support counterpoint at first. The fixed support spherical crown lining plate and the lower support plate have uniform front and rear lateral gaps along the bridge, and the allowable deviation is +/-1 mm.
After the fixed support is positioned (namely the steel beam is positioned), the movable support bottom plate is installed according to a design file and combined with an actual measurement beam span to be handled, and the temperature of the steel beam is used as the standard. When the second-stage constant load of the steel beam is not sufficient or the construction temperature is different from the design temperature, the installation position of the bottom plate is determined by calculating according to the data provided by the design drawing. The deviation of the rest parts is determined according to the specification of a design file. The movable support moving part is cleaned in a dustproof way, the collision and pollution are strictly prevented, and the sliding surface is coated with silicone grease. The silicone grease filling is full and air holes are not clamped. After the formal support is installed, a transparent dustproof apron (cover) with a sliding door and good sealing performance is required to be arranged immediately.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A large longitudinal slope integral bridge girder erection machine over-span construction method is characterized in that: the method comprises the following steps:
s1, arranging a bridge girder erection machine (1) on a bridge floor, arranging the front half part of the bridge girder erection machine (1) at a position where a combined beam pier is to be placed, arranging the rear half part of the bridge girder erection machine (1) on the bridge floor where the combined beam is placed, and arranging a temporary support (2), a front support leg (11), a middle support leg (12) and a tail support leg (13) at the far-end pier (01) to be placed, the near-end pier (02) to be placed, the center position of the first bridge-spanning floor and the inner side end part of the first bridge-spanning floor respectively;
s2, anchoring the bridge girder erection machine (1) at the bridge floor position through a chain block (4), conveying a combined beam into the lower part of the bridge girder erection machine (1) by a trolley, and connecting the front end of the combined beam with a rear overhead crane of the bridge girder erection machine (1);
s3, disassembling the cushion block of the tail support leg (13), and moving the middle support leg (12) to the pier position of the combined beam to be placed;
s4, removing cushion blocks of the front supporting leg (11) and the middle supporting leg (12);
s5, moving the front support leg (11) forwards to the remote pier (01) to be placed and supporting the bridge girder erection machine (1);
s6, transporting the combined beam to the lower part of the bridge girder erection machine (1) through two beam transporting trolley groups (5), wherein the front end of the front beam transporting trolley (51) is opened to the position of the middle supporting leg (12);
s7, hoisting the front end of the combined beam by a crown block at the front end of the bridge girder erection machine (1), and withdrawing the front beam conveying trolley (51) from a construction site;
s8, the rear girder transporting trolley (52) and a crown block at the front end of the bridge girder erection machine (1) move forwards simultaneously, when the rear girder transporting trolley (52) is driven to the position of the middle supporting leg (12), the crown block at the rear end of the bridge girder erection machine (1) lifts the rear end of the combined girder, and the rear girder transporting trolley (52) exits from a construction site;
s9, the front end crown block and the rear end crown block move forwards to the positions above the far-end pier (01) to be placed and the near-end pier (02) to be placed;
s10, the front end crown block and the rear end crown block drop beams;
s11, repeating the steps 1-10 until the installation of the other composite beams to be installed is finished;
and S12, mounting steel transverse supports and end cross beams among the composite beam trusses.
2. The large longitudinal slope integral type bridge girder erection machine over-span construction method according to claim 1, characterized in that: the step S3 includes:
s31, retracting the jacking oil cylinder of the tail supporting leg (13);
s32, removing the cushion block of the tail supporting leg (13);
s33, ejecting the jacking oil cylinder of the tail supporting leg (13) until the middle supporting leg (12) is suspended;
s34, starting the middle supporting leg (12) to rock and roll, and moving the middle supporting leg (12) to the position above a pad at the front end of the beam;
and S35, retracting the lifting oil cylinders of the front supporting leg (11) and the tail supporting leg (13), and supporting the middle supporting leg (12) on a cushion block.
3. The large longitudinal slope integral type bridge girder erection machine over-span construction method according to any one of claims 1-2, characterized in that: the step S4 includes:
s41, the jacking oil cylinder of the front supporting leg (11) is retracted, the front supporting leg (11) is emptied, and the front supporting leg (11) is converted into the middle supporting leg (12) under stress;
s42, removing the cushion block of the front leg (11);
s43, ejecting a jacking oil cylinder of the front supporting leg (11), emptying the middle supporting leg (12), and transferring stress to the front supporting leg (11);
s44, removing the cushion block below the middle supporting leg (12).
4. The large longitudinal slope integral type bridge girder erection machine over-span construction method according to any one of claims 1 to 3, characterized in that: the step S5 includes:
s51, retracting the jacking oil cylinder of the front supporting leg (11) and suspending the front supporting leg (11);
s52, starting the front support leg (11) to shake and roll, and moving the front support leg (11) forward to a position above the far-end pier (01) to be placed;
and S53, ejecting the jacking oil cylinder of the front support leg (11), and supporting the front support leg (11) on the pier of the far-end pier (01) to be placed.
5. The utility model provides an integral bridging machine of big longitudinal slope strides construction system which characterized in that: comprises a bridge girder erection machine (1), nylon hanging belts (3), a chain block (4), two girder transporting trolley sets (5) and a temporary support (2); the bridge girder erection machine is characterized in that the front end of the bridge girder erection machine (1) is arranged above two piers for placing composite girders, the rear end of the bridge girder erection machine (1) is arranged on a first bridge span panel, the foremost position of the bridge girder erection machine (1) is arranged right above a pier for placing a far-end pier (01) and is temporarily supported (2) by the bridge girder erection machine, the upper end of the far-end bridge is placed and is supported by the bridge girder erection machine (1), a chain fall (4) is anchored on the bridge span panel through a nylon hanging strip (3), and the bridge girder transportation trolley group (5) is arranged on the bridge span panel and is located below the rear end of the bridge girder erection machine (1).
6. The large longitudinal slope integral bridge girder erection machine over-span construction system according to claim 5, characterized in that: the beam transporting trolley set (5) comprises a front beam transporting trolley (51) and a rear beam transporting trolley (52), a combined beam to be placed is arranged between the front beam transporting trolley (51) and the rear beam transporting trolley (52), the front beam transporting trolley (51) is arranged at the front end of the first bridge-spanning panel, and the rear beam transporting trolley (52) is arranged at the rear end of the front beam transporting trolley (51).
7. The large longitudinal slope integral bridge girder erection machine over-span construction system according to claim 6, characterized in that: the front end of the front beam carrying trolley (51) and the front end of the rear beam carrying trolley (52) are also provided with inclined battens for preventing sliding down.
8. The large longitudinal slope integral bridge girder erection machine over-span construction system according to any one of claims 5 to 7, characterized in that: the inverted chain (4) and the nylon hanging strip (3) are anchored to main beams on two sides of the bridge girder erection machine (1), and the inverted chain (4) and the nylon hanging strip (3) are provided with four anchoring points on the bridge deck.
9. The large longitudinal slope integral bridge girder erection machine over-span construction system according to claim 5, characterized in that: bridge girder erection machine (1) is including preceding landing leg (11), well landing leg (12), afterbody landing leg (13) and bridge girder erection machine body (14), preceding landing leg (11) set up in bridge girder erection machine body (14) middle part, well landing leg (12) set up in bridge girder erection machine body (14) rear end middle part, afterbody landing leg (13) set up in bridge girder erection machine body (14) afterbody, preceding landing leg (11) well landing leg (12) afterbody landing leg (13) support respectively in treating to place near-end pier (02), first bridge floor central point of striding puts, first bridge floor medial extremity of striding.
10. The large longitudinal slope integral bridge girder erection machine over-span construction system according to claim 9, characterized in that: the front supporting leg (11), the middle supporting leg (12) and the tail supporting leg (13) are all provided with hydraulic jacks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010516211.6A CN111608089A (en) | 2020-06-09 | 2020-06-09 | Large longitudinal slope integral bridge girder erection machine over-span construction method and construction system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010516211.6A CN111608089A (en) | 2020-06-09 | 2020-06-09 | Large longitudinal slope integral bridge girder erection machine over-span construction method and construction system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112575694A (en) * | 2020-12-10 | 2021-03-30 | 江苏捷达交通工程集团有限公司 | Mounting construction method for long-span T beam |
| CN112921817A (en) * | 2021-02-04 | 2021-06-08 | 中铁五局集团有限公司 | Steel support for equivalent extension bridge girder erection machine stand column and use method thereof |
| CN113802467A (en) * | 2021-10-27 | 2021-12-17 | 重庆城建控股(集团)有限责任公司 | Large-gradient beam erecting method based on bridge girder erection machine |
-
2020
- 2020-06-09 CN CN202010516211.6A patent/CN111608089A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112575694A (en) * | 2020-12-10 | 2021-03-30 | 江苏捷达交通工程集团有限公司 | Mounting construction method for long-span T beam |
| CN112921817A (en) * | 2021-02-04 | 2021-06-08 | 中铁五局集团有限公司 | Steel support for equivalent extension bridge girder erection machine stand column and use method thereof |
| CN113802467A (en) * | 2021-10-27 | 2021-12-17 | 重庆城建控股(集团)有限责任公司 | Large-gradient beam erecting method based on bridge girder erection machine |
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