CN115787489A - Method for mounting arch rib cross beam of flying swallow type arch bridge - Google Patents

Abstract

The invention relates to the field of arch bridge construction, in particular to a method for mounting an arch rib beam of a flying swallow type arch bridge; the installation method comprises the following steps: step 1, selecting a unit segment to be hoisted; step 2: hoisting the selected unit segments by adopting hoisting equipment; and step 3: hoisting the corresponding unit sections to the bridge site by using hoisting equipment; and 4, step 4: after the step 3 is finished, adjusting the position of the corresponding unit segment, and after the adjustment is finished, installing and fixing the unit segment; and 5: after step 4, completing the installation of one unit segment; the invention discloses a method for mounting an arch rib crossbeam of a flying swallow type arch bridge; the installation method disclosed by the invention can realize the rapid construction and installation of the arch rib beam, and meanwhile, the accurate adjustment of each unit section in the arch rib beam can be realized through the matched use of the hoisting equipment and the auxiliary adjusting device, so that the accuracy and the rapidness of the installation of the arch rib beam are greatly ensured.

Description

Method for mounting arch rib cross beam of flying swallow type arch bridge

Technical Field

The invention relates to the field of arch bridge construction, in particular to a method for mounting an arch rib cross beam of a flying swallow type arch bridge.

Background

In carrying basket formula steel case arched bridge steel case arch rib crossbeam installation work in-process to the large-span, to the position transfer of arch rib crossbeam, generally exactly use lifting device to realize the hoist and mount transposition of arch rib crossbeam, traditional lifting device can the hoist and mount transposition of arch rib crossbeam, but because traditional hoist and mount mode does not have the uniformity, the deviation can appear in everybody's the operation mode, makes the efficiency of traditional arch rib crossbeam hoist and mount transportation lower then.

Therefore, in order to accelerate the hoisting and transferring efficiency of the arch rib beam, the hoisting and indexing process of the existing arch rib beam needs to be optimized.

Meanwhile, the adjusting mechanism is lacked during hoisting and transporting of the traditional arch rib beam, and the accurate placement of the hoisted arch rib beam is inconvenient to guarantee, so that the installation error is easy to occur during subsequent installation.

In addition; in the installation and construction process of the large-span basket type steel box arch bridge steel box arch rib beam, due to the influence of temperature change and various equipment manufacturing errors, all unit stages of the arch rib beam need to be accurately positioned by adopting necessary and effective measures before installation, the aerial posture of the arch rib beam is adjusted, and then the accuracy of the installation position of each follow-up unit segment is ensured.

Patent document No. CN107338733A discloses a hoisting device and hoisting method for overhead attitude adjustment and positioning of steel box arch ribs in 11/10 in 2017, which perform attitude adjustment on overhead arch rib beams, connect a hoisting device to the arch rib beams sequentially through a hanging strip, an adjusting rod, a hanging frame mechanism, a hanging strip and a hook, and adjust the attitude of the hanging frame mechanism through the adjusting rod, thereby adjusting the attitude of the arch rib beams.

Disclosure of Invention

The invention aims to provide a method for installing an arch rib beam, which has high efficiency and uniform operation.

In order to achieve the purpose, the invention adopts the technical scheme that:

a method for mounting a flying swallow type arch bridge arch rib cross beam; the arch rib beam comprises a plurality of unit sections, and adjacent unit sections are butted;

the installation method comprises the following steps:

step 1, selecting unit segments to be hoisted;

and 2, step: hoisting the selected unit segments by adopting hoisting equipment;

and step 3: after the selected unit sections are hoisted by the hoisting equipment, turning and transferring are carried out, so that the hoisted unit sections are conveyed to the bridge site;

and 4, step 4: after the step 3 is finished, adjusting the position of the corresponding unit segment, and after the adjustment is finished, installing and fixing the unit segment;

and 5: and 4, after the step 4 is finished, the installation of one unit segment is finished, and the arrangement 1-4 is repeated until all the unit segments of the arch rib beam are hoisted and installed at corresponding positions.

In the step 1, after the corresponding unit segment to be hoisted is selected, an auxiliary adjusting device is installed on the unit segment to be hoisted.

Before the step 2 is started, trial hoisting is required, after the hoisting equipment is required to be connected with the corresponding unit sections, the hoisting equipment moves, the hoisted unit sections are suspended and stagnated for 15 minutes, and if the hoisting belts in the hoisting equipment are not abnormal, the corresponding unit sections are continuously hoisted.

The hoisting equipment adjusts the position of the hoisted unit section, and the hoisting system in the hoisting equipment adjusts the position of the hoisted unit section.

And the adjacent unit segments are connected in a welding mode.

Using a hoisting system for adjustment of the unit segment placement position; the auxiliary adjusting device is externally connected with an adjusting jack, and the auxiliary adjusting device and the adjusting jack are used for fine adjustment of the arrangement position of the corresponding unit section.

In the step 1, a lifting lug mechanism is arranged on the selected unit section, the lifting lug mechanism comprises a lifting lug main plate, and a lateral stiffening plate is arranged on the side surface of the lifting lug main plate; the lifting lug mechanism is connected with the hoisting equipment.

Each unit section in the arch rib beam is formed by splicing a plurality of plate units.

And (5) before the step 4 is carried out, arranging a support pile position for supporting the arch rib cross beam at the bridge position.

The support pile position includes a plurality of stand steel pipes, be equipped with the roof on the stand steel pipe, be equipped with a plurality of stiffening plate spare between roof and the stand steel pipe.

The invention has the advantages that:

the invention discloses a method for mounting an arch rib crossbeam of a flying swallow type arch bridge; the installation method disclosed by the invention can realize the rapid construction and installation of the arch rib beam, and meanwhile, the accurate adjustment of each unit section in the arch rib beam can be realized through the matched use of the hoisting equipment and the auxiliary adjusting device, so that the accuracy and the rapidness of the installation of the arch rib beam are greatly ensured.

Drawings

The contents of the various figures of the present specification and the labels in the figures are briefly described as follows:

fig. 1 is a schematic structural view of the arch rib beam of the present invention.

Fig. 2 is a schematic structural view of the initial connection of the hoisting system and the unit segments of the present invention.

Fig. 3 is a schematic structural diagram of the attitude adjustment in the air after the hoisting system of fig. 2 is connected with the unit segments.

Figure 4 is a schematic view of the electrical components of the hoist system of figure 2.

Fig. 5 is an elevation view of the wedge block of the present invention installed on the pile top of the steel pipe pile.

Fig. 6 isbase:Sub>A cross-sectional view taken alongbase:Sub>A-base:Sub>A of fig. 5.

Fig. 7 is a cross-sectional view taken along 1-1 of fig. 5.

Fig. 8 is a cross-sectional view taken along line 2-2 of fig. 5.

Fig. 9 is a schematic structural view of the auxiliary adjusting device of the present invention in use.

FIG. 10 is a schematic view of a partial structure of a steel column tube according to the present invention.

Fig. 11 is a schematic structural view of the lifting lug mechanism of the present invention.

The labels in the above figures are:

in the drawings: 1-floating crane, 1-1-arch rib beam, 1-11-unit section, 2-lifting hook, 3-connecting lifting belt, 4-first buckle, 5-lifting appliance, 6-first hanging lug, 7-second hanging lug, 8-second buckle, 9-lifting belt, 10-third buckle, 11-lifting lug, 12-weight, 13-containing box, 14-steel rope connecting piece, 15-traction rope and 16-traction end; 17. auxiliary adjusting device, 18, supporting pile position, 17-1 wedge block, 172-arch rib beam and 181-upright steel tube.

Detailed Description

The following description of preferred embodiments of the invention will be made in further detail with reference to the accompanying drawings.

A method for mounting a flying swallow type arch bridge arch rib crossbeam 1-1; the arch rib crossbeam 1-1 comprises a plurality of unit sections 1-11, and adjacent unit sections 1-11 are butted;

the installation method comprises the following steps:

step 1, selecting unit segments 1-11 to be hoisted;

step 2: hoisting the selected unit sections 1-11 by using hoisting equipment;

and step 3: after the hoisting equipment hoists the selected unit sections 1-11, turning and transferring the selected unit sections to enable the hoisted unit sections 1-11 to be conveyed to the bridge site;

and 4, step 4: after the step 3 is finished, adjusting the positions of the corresponding unit sections 1-11, and after the adjustment is finished, installing and fixing the unit sections 1-11;

and 5: and (4) after the step 4 is finished, completing the installation of one unit section 1-11, and repeating the arrangement 1-4 until each unit section 1-11 of the arch rib beam 1-1 is hoisted and installed at a corresponding position.

The mounting method disclosed by the invention is mainly suitable for mounting the arch rib beam 1-1; the arch rib beam 1-1 of the present invention is a multi-sectional structure, that is, as stated above, the arch rib beam 1-1 of the present invention includes a plurality of unit sections 1-11, where the unit sections 1-11 are only a general term, and in practical use, the adjacent unit sections 1-11 may have obvious differences in size and volume, the present invention divides the arch rib beam 1-1 into a plurality of unit sections 1-11, and does not represent that the arch rib beam 1-1 of the present invention is a rectangular beam, and the size of each unit section 1-11 is designed according to practical needs.

The invention discloses a mounting method; after hearing the disclosure of the placing method, the hoisting and installation of each unit segment 1-11 can be realized, and then the hoisting and installation of the beam of the whole arch rib can be realized.

Meanwhile, it should be noted that, in the practical implementation, two ends of each swallow-shaped arch bridge are respectively provided with one arch rib crossbeam 1-1, so that in the practical implementation of the invention; two arch rib cross beams 1-1 of the flying swallow type arch bridge can be synchronously constructed on two banks, and the construction sequence of the two arch rib cross beams refers to the above; in practice, i.e. by the addition of labor and equipment, simultaneous construction operations of the two rib beams 1-1 can be achieved together.

In practical use, the hoisting equipment mainly comprises a floating crane, and the floating crane is arranged, so that the transportation, the transportation and the hoisting of each unit segment 1-11 in the arch rib beam 1-1 on the water surface are facilitated.

Further, in the step 1 of the invention, after selecting the corresponding unit sections 1-11 to be hoisted, the auxiliary adjusting devices 17 are installed on the unit sections 1-11 to be hoisted; the auxiliary adjusting device 17 is arranged, so that the unit sections 1-11 to be constructed can be supported; the stability of placing the unit sections 1-11 on the support pile positions 18 after hoisting is guaranteed, and in addition, the auxiliary adjusting device 17 disclosed by the invention is matched with a jack during subsequent use, so that the positions of the unit sections 1-11 to be constructed after hoisting can be adjusted; the accuracy of the positions of the unit sections 1-11 in the subsequent construction connection process is guaranteed.

Specifically, in the present invention, the auxiliary adjusting device 17 includes a wedge block 1, the wedge block 1 includes two side plates 1711 that are distributed in parallel at intervals, an elevating plate 1712 is disposed between the two side plates 1711, and the elevating plate 1712 is perpendicular to the side plates 1711; the vertical sections of the elevated plate 1712 and the two side plates 1711 are H-shaped; the side edge plate 1711 is provided with an attaching inclined plane 111; the auxiliary adjusting device 17 is arranged, so that the unit sections 1-11 to be constructed can be supported; the stability of placing the unit sections 1-11 on the support pile positions 18 after hoisting is guaranteed, and in addition, the auxiliary adjusting device 17 disclosed by the invention is matched with a jack during subsequent use, so that the positions of the unit sections 1-11 to be constructed after hoisting can be adjusted; the accuracy of the positions of the unit sections 1-11 in the subsequent construction connection process is guaranteed.

The auxiliary adjusting device 17 disclosed by the invention is mainly used for assisting the construction operation of the unit sections 1-11, the auxiliary adjusting device 17 disclosed by the invention mainly comprises a wedge-shaped block 1, the wedge-shaped block 1 plays a good supporting role, the unit sections 1-11 are conveniently supported, and the unit sections 1-11 are conveniently supported and placed after being hoisted; in addition, the wedge-shaped block also plays an isolation and protection role, and mainly when the position of the unit section 1-11 is adjusted by a jack in the following process, the jack directly presses against the wedge-shaped block, so that the jack is prevented from directly pressing against the unit section 1-11, and the jack is prevented from damaging the unit section 1-11; in addition, the wedge-shaped block 1 comprises two side plates 1711 which are distributed in parallel at intervals, and the two side plates 1711 are main supporting plate members and are mainly used for supporting the unit segments 1-11 in the subsequent use; the stability of the placement positions of the unit segments 1-11 is ensured, in addition, an elevating plate 1712 is arranged between the two side plates 1711, the elevating plate 1712 is a reinforcing and connecting plate, the connection between the two side plates 1711 is convenient, and the structural strength of the whole wedge-shaped block 1 can be increased, in addition, the arrangement of the elevating plate 1712 facilitates the placement and arrangement of the subsequent middle plates 1713 and other components, and when the wedge-shaped block is used specifically, the elevating plate 1712 is arranged perpendicular to the side plates 1711; the vertical sections of the elevated plate 1712 and the two side plates 1711 are H-shaped; through the arrangement, the discharging inner cavity formed by the side plate 1711 is divided into a feeding cavity 1715 and a discharging cavity 1716; the reinforcing piece and the jack 1717 are conveniently arranged subsequently, the overall structural strength of the wedge block 1 is conveniently guaranteed, and meanwhile the adjustment of the positions of the unit sections 1-11 is conveniently realized by subsequently matching the jack 1717.

In addition, the side edge plate 1711 is provided with an attaching inclined plane 111; the arrangement of the attaching inclined plane 111 facilitates the connection between the wedge block 1 and the unit sections 1-11, and when the wedge block is actually used, the wedge block 1 is attached to the unit sections 1-11 to be hoisted through the attaching inclined plane 111, so that the contact area between the wedge block 1 and the unit sections 1-11 is ensured, and the connection stability between the wedge block 1 and the unit sections 1-11 is ensured; during actual connection, the wedge block 1 and the unit sections 1-11 are fixedly connected in a welding mode generally, and the wedge block 1 is hoisted together with the unit sections 1-11 during hoisting; the linkage of the movement of the unit sections 1-11 and the wedge block 1 is ensured, and the position of the wedge block 1 is conveniently adjusted subsequently through a jack 1717, so that the adjustment of the positions of the unit sections 1-11 is realized.

Further, in the present invention, the wedge block 1 further includes a middle plate 1713 disposed on the elevated plate 1712, and the middle plate 1713 and the side plate 1711 are disposed in parallel to each other; the middle supporting plate structure is arranged by the middle plate 1713, the contact area between the wedge block 1 and the unit sections 1-11 is increased, the structural strength of the wedge block 1 is better guaranteed, and the connection stability between the wedge block 1 and the unit sections 1-11 can be better guaranteed.

In the invention, two side plates are distributed at intervals; the central position is provided with a middle plate, an elevating plate is arranged below the middle plate, and two sides of the elevating plate are respectively connected with a side plate; the shape of the middle plate is the same as that of the upper parts of the side plates, the middle plate and the side plates are distributed in parallel, and an I-shaped beam is arranged between the middle plate and the adjacent side plate.

Furthermore, in the present invention, two side panels 1711 are symmetrically disposed on two sides of the middle panel 1713; the middle plate 1713 and the side plates 1711 are distributed at intervals; by the design, the subsequent arrangement and placement of the supporting I-beam 1714 can be facilitated; meanwhile, by adopting the arrangement, the wedge block 1 can be connected with the unit sections 1-11 at multiple positions; better ensures the connection between the wedge block 1 and the unit sections 1-11.

Further, in the present invention, at least one supporting i-beam 1714 is disposed between the middle plate 1713 and the adjacent side plate 1711; the supporting I-beam 1714 plays a role in transverse supporting, so that the middle plate 1713 and the side plate 1711 can be directly connected, and the overall structural strength of the whole wedge-shaped block 1 is better ensured.

Further, in the present invention, the side plate 1711 includes a plate body, and the plate body is provided with an inclined groove, and the inclined groove forms the attachment inclined surface 111 on the plate body; the inclined plane groove is arranged at the corner of the plate body, and the vertical section of the inclined plane groove is in a right-angled triangle shape; the inclined plane groove of the invention is a joint inclined plane 111; the subsequent attaching connection between the side plates 1711 and the unit segments 1 to 11 is facilitated, the length of the right-angle side of the inclined plane groove is smaller than the length or the width of the corresponding side plate 1711, the design mode enables the upper end of the side plate 1711 to form a trapezoidal structure, based on the design, the horizontal projection area below the wedge block 1 can be ensured, the subsequent stability of the wedge block 1 in the arrangement of the pile top of the steel pipe pile 3 is further facilitated, meanwhile, the attaching inclined plane 111 formed by the inclined plane groove is an inclined plane, the longitudinal and transverse supporting force can be provided for the unit segments 1 to 11, and the stability of the abutting connection between the unit segments 1 to 11 and the adjacent arch rib or the bridge floor is better ensured.

Furthermore, in the invention, a connecting beam 1718 is arranged at one end of each of the two side plates 1711, which is far away from the middle plate 1713; the tie-beam 1718 plays a good bridging role, better guarantees the stability of connecting between two side boards 1711.

Furthermore, hoisting holes are formed in the side plates 1711; due to the arrangement of the hoisting holes, the position of the wedge-shaped block 1 can be hoisted by using a hoisting tool as required when the wedge-shaped block is used in practice; which in turn facilitates the displacement operation of the wedge-shaped block 1.

Further, before the step 2 is started, trial hoisting is required, after the hoisting equipment is required to be connected with the corresponding unit sections 1-11, the hoisting equipment moves, so that the hoisted unit sections 1-11 are suspended and stagnated for 15 minutes, and if the slings in the hoisting equipment are not abnormal, the corresponding unit sections 1-11 are continuously hoisted; by the arrangement, the risk of hoisting the unit sections 1-11 can be reduced, and the occurrence of construction accidents is reduced; meanwhile, subsequent observers can conveniently observe whether the hoisting equipment and the unit sections 1-11 are installed in place or not; when the problems of unstable connection or connection errors and the like of the connection part of the hoisting equipment and the unit sections 1-11 are found, based on the steps, the replacement or rework can be facilitated.

Further, in the invention, the hoisting equipment adjusts the positions of the hoisted unit segments 1 to 11, and the hoisting system in the hoisting equipment adjusts the falling positions of the hoisted unit segments 1 to 11; when the device is actually used, coarse adjustment of the positions of the corresponding unit sections 1-11 can be realized through the use of the hoisting equipment, and the actual cost of subsequent fine adjustment is reduced.

As shown in the figure, the hoisting system comprises a floating crane 1, a lifting hook 2 is arranged on the floating crane 1, a lifting sling 5 is connected to the lifting hook 2, and the displacement end of the lifting sling 5 is connected with the unit sections 1-11 through a lifting sling 9; the lifting sling device comprises a lifting sling 5, and is characterized by further comprising an electrical assembly for controlling the working of the lifting sling 5, wherein the electrical assembly is used for controlling the extending length of a displacement end of the lifting sling 5 so as to select a lifting sling 9 with a specific length, the aerial postures of the lifted unit sections 1-11 are controlled through the integral length of the lifting sling 5 and the length of the lifting sling 9, and a user can conveniently realize the posture control of the unit sections 1-11 before lifting, specifically, in the embodiment, the number of lifting hooks 2 is two, two lifting slings 5 are respectively arranged on each lifting hook 2, the lifting hooks 2 are connected with steel ropes on the floating crane 1, the lengths of the four lifting slings 9 in the embodiment are different, and the extending length of the displacement end of each lifting sling 5 during installation is different; the lifting slings 5 are flexible to operate, and 4 lifting slings 5 can be used vertically or obliquely; can be used independently or simultaneously; in addition, the operation can be carried out manually, and the synchronous automatic control can also be carried out; can be controlled individually or simultaneously by 2 or more than one.

When the lifting device is used, the lengths of the displacement ends of four lifting slings 5 are controlled through an electrical component, then the lifting slings are distributed at the four ends of different lifting slings 9 for connection, the two lifting slings 5 are respectively arranged at the two sides of a lifting hook 2, the four lifting slings 9 are respectively connected at the four ends of unit sections 1-11, at the moment, a lifting hook 2 is controlled by a floating crane 1 to move upwards, one side of each unit section 1-11 moves upwards along with the lifting hook 2, the lifting hook 2 stops moving and keeps still, the floating crane 1 works to enable the other lifting hook 2 to move upwards, at the moment, the other side of each unit section 1-11 moves upwards until the heights of the two lifting hooks 2 are the same, at the moment, the posture of each unit section 1-11 in the air is the height required during installation, and if the posture has an error, the displacement ends of the lifting slings 5 are controlled by the electrical component to move, so that fine adjustment is realized; during fine adjustment, the height adjustment of different ends of the unit sections 1-11 is realized through the lifting sling 9 and the extending length of the displacement end, the adjustment is convenient and quick, and the floating crane 1 is convenient to move the unit sections 1-11 to the specified positions for installation and welding; the unit sections 1-11 are high in installation and welding precision requirements, the lengths of the steel wire ropes or the hanging strips are integers, the lengths of the rigging calculated theoretically cannot be matched when rigging matching is conducted, the extending lengths of the displacement ends of the lifting slings 5 are accurately controlled through the electrical assemblies, and the rigging values calculated theoretically can be met through matching with the lifting hanging strips 9, so that the requirement of accurate positioning is met.

Specifically, referring to fig. 1, the lifting sling 5 includes a hydraulic cylinder, a first hanging lug 6 is provided on the hydraulic cylinder, a piston is provided at a displacement end of the lifting sling 5, and a second hanging lug 7 is provided on the piston of the hydraulic cylinder.

First hangers 6 are connected with lifting hook 2 through connecting suspender 3, and the pot head of connecting suspender 3 is established on lifting hook 2, and the other end of connecting suspender 3 is equipped with first buckle 4, and first buckle 4 is connected with first hangers 6, realizes being connected of lifting hook 2 and first hangers 6 through connecting suspender 3, and just first buckle 3 is the ring form, and fastening bolt connects through fastening bolt in the both ends of first buckle 3, and fastening bolt overlaps and establishes on first hangers 6.

A second buckle 8 and a third buckle 10 are respectively sleeved at two ends of the lifting sling 9, the second buckle 8 is connected with a second hanging lug 7, the second buckle 8 is in a circular ring shape, two ends of the second buckle 8 are connected through a fastening bolt, and the fastening bolt is sleeved on the second hanging lug 7; the third buckle 10 is connected with the lifting lugs 11 on the unit sections 1-11, the third buckle 10 is circular, two ends of the third buckle 10 are connected through fastening bolts, and the fastening bolts are sleeved on the lifting lugs 11 of the unit sections 1-11.

The electric assembly comprises an intelligent case, a concentrator, a wireless access point and an emergency stop receiving box, wherein the intelligent case is connected with the emergency stop receiving box through a data cable, the wireless access point is electrically connected with the intelligent case, the emergency stop receiving case is connected with the concentrator through the data cable, the concentrator is connected with a lifting hanger 5 through a combined cable, the concentrator is externally connected with a main power supply cable, when the electric assembly is used, the concentrator transmits a control signal to the lifting hanger 5, the lifting hanger 5 controls the extending length of a displacement end of the lifting hanger, and the intelligent case and the wireless access point receive an external wireless signal; the emergency stop receiving box receives the emergency stop signal, so that the emergency stop receiving box receives the emergency stop signal and transmits the emergency stop signal to the concentrator under the emergency condition, and then the signal is transmitted into the lifting sling 5 through the combined cable, so that the lifting sling 5 is controlled to be in emergency stop; the electrical components and the lifting sling 5 are powered through a mains power cable.

Specifically, be equipped with high-pressure hydraulic power unit, oil tank and control electronic box on promoting hoist 5, be equipped with the controller that promotes hoist 5 in the control electronic box, the work of high-pressure hydraulic power unit is controlled to the controller, and then makes the oil in the oil tank flow in the pneumatic cylinder, and then the extension length of control piston, the controller in the control electronic box passes through the combination cable and is connected with the concentrator.

The electric assembly further comprises a remote control device, a scram controller and a handle controller, the remote control device is connected with the wireless access point through Wi-Fi, the remote control device sends out Wi-Fi signals and then receives the Wi-Fi signals through the wireless access point to control the lifting hanger 5, the scram controller is connected with the scram receiving box through the Wi-Fi and sends out scram Wi-Fi signals, the scram controller transmits the signals to the concentrator to enable the lifting hanger 5 to scram, the handle controller is connected with the telescopic assembly through a cable and serves as a standby device, and under the condition that the remote control device fails, the lifting hanger 5 is controlled through the handle controller and the cable; the remote control device is controlled by wireless Wi-Fi, and the effective distance is 100m; meanwhile, the device has real-time visibility, namely the stroke size, the lifting height and the load of each oil cylinder of each lifting sling 5 can be seen through the interface of a remote control device.

Referring to the attached drawings, the electrical assembly is arranged in the containing box 13, the steel wire rope piece 14 is arranged on the containing box 13, the steel wire rope piece 14 is connected with the floating crane 1, the floating crane 1 works to enable the containing box 13 and the steel wire rope piece 14 to move upwards, and the steel wire rope piece 14 move upwards along with the upwards movement of the lifting sling 5 during working, so that the electrical assembly in the containing box 13 is guaranteed to stably control the lifting sling 5.

Referring to the attached drawings, a traction rope 15 is arranged on the containing box 13, a movable traction end 16 is arranged on the traction rope 15, when the unit sections 1-11 are hoisted on a wharf in implementation, the traction end 16 can move a mechanism, the traction end 16 moves at the moment, and the containing box 13 is connected with the traction rope 15 to always not influence the lifting sling 5 and the unit sections 1-11.

When in specific use, the hoisting system is used, and the specific steps are as follows:

step 1, checking a lifting sling 5, placing the lifting sling 5 on a semi-trailer for transportation, and taking the lifting sling 5 off the semi-trailer after transporting to a designated position; specifically, when lifting device 5 is detected, the specific content of the inspection is as follows: checking whether a hydraulic pump of the lifting sling 5 leaks oil, whether an oil tank leaks oil, whether a bolt on the oil tank is screwed, whether a valve and a valve bank on the lifting sling 5 leak oil, whether the bolt on the valve and the valve bank is screwed, whether a bolt on a vent cap on the lifting sling 5 is screwed, and whether a protective shell on the lifting sling 5 is damaged;

step 2, connecting the lifting slings 5 with the electrical assembly, respectively controlling the pistons of the four lifting slings 5 to move through a remote control device, connecting first hangers 6 at one end of the lifting slings 5 with first buckles 4, sleeving connecting slings 3 on the lifting hooks 2, connecting second hangers 7 at the piston end of the lifting slings 5 with second buckles 8, sleeving lifting slings 9 on the second buckles 8, sleeving the lifting slings 9 on third buckles 10, further connecting the third buckles 10 with lifting lugs 11 on the unit sections 1-11, sleeving the connecting slings 3 on the two lifting slings 5 on the lifting hooks 2, respectively connecting the two lifting slings 5 on the two lifting hooks 2 on the floating crane 1, and respectively connecting the four third buckles 10 with the four lifting lugs 11 on the unit sections 1-11;

step 3, the electrical assembly is stored in a storage box 13, the storage box 13 is connected with a steel rope connecting piece 14, the steel rope connecting piece 14 is connected with the floating crane 1, a traction rope 15 is connected to the bottom end of the storage box 13, the traction rope 15 is connected with a traction end 16, and the floating crane 1 works to lift the whole storage box 13 to the air;

step 4, the floating crane 1 works to enable one lifting hook 2 to move upwards, and further enable two lifting slings 5, a connecting hanging strip 3 and a lifting hanging strip 9 on the lifting hook 2 to move upwards, so that one end of each unit section 1-11 moves upwards along with the lifting slings, the lifting slings move upwards to incline the unit sections 1-11, and the lifting hook 2 is kept still;

step 5, the floating crane 1 works to enable the other hook 2 to move upwards, and then the two lifting slings 5, the connecting hanging strip 3 and the lifting hanging strip 9 on the other hook 2 move upwards, so that the other ends of the unit sections 1-11 move upwards along with the other ends, and the other end moves upwards to enable the hook 2 to be consistent with the height of the hook 2 in the step 4;

step 6, the floating crane 1 works to enable the two lifting hooks 2 to move upwards simultaneously, the unit sections 1-11 are integrally moved to the lowest ends of the unit sections 1-11 and 1500mm away from the ground, whether the unit sections 1-11 meet the requirements in the air or not is observed, and if the unit sections meet the requirements, the whole unit sections 1-11 are moved to the designated positions through the floating crane 1 to be installed; if the requirements are not met, the pistons of the four lifting slings 5 are controlled by a remote control device to be finely adjusted until the requirements are met, and after the requirements are met, the whole unit segment 1-11 is moved to a specified position by the floating crane 1 to be installed;

and 7, in the processes of steps 4, 5 and 6, the traction end 16 moves to enable the traction rope 15 to move, so that the whole containing box 13 is inclined, and the containing box 13 is ensured not to influence the work of the lifting sling 5.

Furthermore, the adjacent unit sections 1-11 are connected in a welding mode; the connection mode facilitates the connection between the adjacent unit sections 1-11; when in actual connection, the circular seam welding is required to be adopted between the adjacent unit sections 1-11; in practical implementation, the circular seam welding construction sequence is required to be as follows: top plate interface → bottom plate interface → web interface → stiffener panel (where the stiffener is a reinforcing plate structure on each unit segment); during actual welding, the top plate is required to be welded from the center to two sides; the bottom plate is welded from the center to two sides; welding a web plate from bottom to top; by adopting the welding sequence, the welding stress can be well avoided.

Further, in the present invention, a hoist system is used for the adjustment of the placement positions of the unit segments 1 to 11; primary adjustment of the unit segments 1-11 is achieved; the auxiliary adjusting device 17 is externally connected with an adjusting jack, and the auxiliary adjusting device 17 and the adjusting jack are used for fine adjustment of the arrangement positions of the corresponding unit sections 1-11; in the present invention, the auxiliary adjusting device 17 is matched with a jack 1717; the jack is generally a three-way jack; the two side plates 1711 are distributed at intervals to form a discharging cavity, an elevating plate 1712 is arranged between the two side plates 1711, and the elevating plate 1712 divides the discharging cavity into a feeding cavity 1715 and a discharging cavity 1716; the jacks 1717 are arranged on the support pile positions 18 below, namely on the upright steel pipes 181 in the support pile positions 18; and is arranged in the blanking chamber 1716 of the auxiliary adjusting device 17; the jack 1717 is mainly used for pushing the wedge block 1 to enable the wedge block 1 to drive the unit sections 1-11 to move during subsequent use, so that the positions of the unit sections 1-11 are adjusted, and in addition, the jack 1717 adopts a three-way jack 1717, so that the spatial positions of the unit sections 1-11 can be changed according to requirements during actual use; meanwhile, in order to facilitate the matching use of the jack 1717 and the wedge-shaped block 1, the jack 1717 is arranged below the wedge-shaped block 1 and above the pile top of the corresponding steel pipe pile, the wedge-shaped block 1 is pushed by the operation of the jack 1717, and finally the adjustment of the positions 1-11 of the unit sections is realized; in conclusion, the accurate adjustment of each unit section 1-11 in the arch rib beam 1-1 can be realized through the matching use of the hoisting equipment and the auxiliary adjusting device 17, and the accuracy and the rapidness of the installation of the arch rib beam 1-1 are greatly ensured.

Further, in the step 1 of the invention, a lifting lug mechanism 1-2 is arranged on the selected unit segment 1-11, the lifting lug mechanism 1-2 comprises lifting lug main boards 1-21, and lateral stiffening plates 1-22 are arranged on the side surfaces of the lifting lug main boards 1-21; the lifting lug mechanism 1-2 is connected with a lifting device; according to the invention, through the arrangement of the lifting lug main plates 1-21 and the lateral stiffening plates 1-22, the strength of the lifting lug mechanisms 1-2 is greatly improved, the connection stability between the lifting lug mechanisms and the hoisting equipment is facilitated, and in actual arrangement, four lifting lug mechanisms 1-2 are generally arranged on one unit section 1-11 and distributed at four corners of the unit section 1-11.

According to the invention, through the arrangement of the lifting lug mechanism, the lifting position of the unit segment in the arch rib beam can be determined, and then the overturning operation during the conveying of the unit segment is reduced.

Further, in the invention, each unit section 1-11 in the arch rib beam 1-1 is formed by splicing a plurality of plate units; due to the arrangement, the assembly of each unit section 1-11 is facilitated, and the actual construction operation of the arch rib beam 1-1 is further facilitated.

Further, before the step 4 is performed, a support pile position 18 for supporting the arch rib beam 1-1 is required to be arranged at the bridge position; according to the invention, through the arrangement of the support pile position 18, the subsequent placement of each unit segment 1-11 is facilitated, the subsequent fine adjustment is facilitated, and the subsequent welding construction is also facilitated; the construction method is equivalent to building a construction platform on water through the arrangement of the support pile position 18, and facilitates the subsequent construction operation of each unit section 1-11.

In the invention, the support pile position comprises a plurality of upright steel pipes 181, and the upright steel pipes 181 are actually steel pipe pile structures; the pile top plate 182 is arranged on the upright steel pipe 181, and the arrangement of the pile top plate 182 increases the transverse area of the upright steel pipe 181, thereby facilitating the placement of the subsequent unit sections 1-11; in addition, a plurality of stiffening plate members 183 are arranged between the pile top plate 182 and the upright steel pipe 181; stiffening plate members 183 provide a stiffening effect to ensure the overall structural strength of pile head plate 182.

Further, in the present invention, the auxiliary adjusting device 17 further includes a pile top steel plate 31; the pile top steel plate 31 is respectively connected with the wedge block 1 and the pile top plate 182; the pile top steel plate 31 is a plate structure for subsequent fixing, and is mainly characterized in that after the subsequent jack 1717 finishes adjusting the positions of the unit sections 1-11, the pile top steel plate 31 is used as a connecting piece to realize the connection between the wedge block 1 and the pile top of the steel pipe pile 3, so that the wedge block 1 is fixed on the pile top, and then the positions of the unit sections 1-11 are fixed, so that the subsequent unit sections 1-11 are conveniently butted with adjacent components, and the accuracy of the butt joint between the unit sections 1-11 and the adjacent components is ensured.

Specifically, the method comprises the following steps:

the installation of the arch rib beam 1-1 adopts a construction method of 'support pile position 18+ floating crane sectional hoisting'.

The support pile position 18 is built by steel pipes and section steel, and the arch rib cross beam 1-1 is hoisted to the support section by the floating crane for welding and assembling.

Steel structure assembling sites are respectively arranged on two banks, feeding arch wharfs are arranged on two sides of a river bank, plate units are transported to the assembling sites to be assembled into sections and then transported to the feeding arch wharfs by a module vehicle, the unit sections 1-11 are hoisted to bridge positions by a floating crane in the wharf, arches are taken out after the floating crane is in place, and arch rib cross beams 1-1 are hoisted.

In actual construction, 2 610t land transportation assembled floating crane installation arch rib crossbeams 1-1,1# are arranged on the south side of a bridge position, and 2# floating crane is arranged on the north side of the bridge position.

The arch rib beam 1-1 segment is assembled into a plate unit by the plate unit in the assembling field of east and west banks, then the plate unit is discharged, and the plate unit is transported to wharfs of west and south banks by a module vehicle.

The west bank south side wharf adopts a steel pipe Bailey beam support structure form, and has the length of 27m and the width of 15.5m; and hardening the northwest side wharf by adopting a sidewalk.

The trestle is marked by paint, so that the transport vehicle can be ensured to run on a specified route.

The lowest water level for hoisting the arch rib beam 1-1 is designed according to +39m, and the sections are hoisted by adopting a 610t floating crane with a 90m boom.

The construction steps are described by taking one unit segment 1-11XL1Z in the arch rib beam 1-1 as an example; the rest of the segment construction is referred to this section.

The construction method comprises the following steps: during hoisting, trial hoisting is carried out, the hoisting is carried out for 10cm, and the conditions of the hoisting belts, the steel wire ropes and the lifting lugs are observed after the hoisting is stopped for 15 min;

and a second construction step: the floating crane is close to the lifting arch wharf; taking the segments after anchoring and fixing;

when the unit sections 1 to 11 are hoisted, the floating crane adopts a boom of 90m, the hoisting height is 81m, the horizontal distance is 34m, the maximum hoisting load is 310t, the arch rib beam 1 to 1 is 180.4t heaviest, the load rate is 58 percent, and the construction requirement is met;

and a third construction step: turning after the floating crane lifts the unit sections 1-11;

the construction step four: floating and lifting to a bridge site;

the construction step five: and the unit sections 1-11 are transported to the bridge site by the floating crane, the unit sections 1-11 are installed, and finally the corresponding arch rib cross beams 1-1 are formed.

When the XL1Z segment is hoisted, a 90m suspender is adopted by the floating crane, the hoisting height is 81m, the horizontal distance is 34m, the maximum hoisting load is 310t, and the heaviest weight of the upper arch rib is 180.4t, so that the construction requirement is met.

The lifting appliance is formed by combining 4 hydraulic cylinders and is designed for leveling load.

The system has 4 hydraulic cylinders, which allows the use load to reach 600 tons, the stroke to reach 1.5m, and the length, width and height to reach 3.11 multiplied by 0.42 multiplied by 0.955m.

The 610t floating crane adopts double lifting hooks to lift corresponding unit sections 1-11, 4 lifting points are arranged on each unit section 1-11, lifting lugs are arranged along the transverse bridge direction and are welded at the position of a transverse partition plate in an upper arch rib in an ear plate pin hole mode; the lifting appliance adopts a customized lifting appliance to adjust the space attitude of the arch rib, 200t of synthetic fiber lifting belt (6 times of safety factor) + clamping ring, and the included angle between the lifting belt and the plane is not less than 60 degrees.

The snap ring model GB/T25854-6-DX200.

In order to prevent the lug plate of the lifting lug from being subjected to lateral bending moment, the lug plate is arranged along the transverse bridge direction of the upper arch rib, the lug plate main plate and the transverse diaphragm plate of the upper arch rib are subjected to full penetration butt welding, the lateral stiffening rib of the lifting lug and the lug plate main plate adopt penetration fillet welding, and the size of a welding leg is 12mm.

It is clear that the specific implementation of the invention is not restricted to the above-described embodiments, but that various insubstantial modifications of the inventive process concept and technical solutions are within the scope of protection of the invention.

Claims (10)

1. A method for mounting a flying swallow type arch bridge arch rib crossbeam is characterized in that,

the arch rib beam comprises a plurality of unit sections, and adjacent unit sections are butted;

the installation method comprises the following steps:

step 1, selecting a unit segment to be hoisted;

step 2: hoisting the selected unit segments by adopting hoisting equipment;

and 3, step 3: after the selected unit sections are hoisted by the hoisting equipment, turning and transferring are carried out, so that the hoisted unit sections are conveyed to the bridge site;

and 4, step 4: after the step 3 is finished, adjusting the position of the corresponding unit segment, and after the adjustment is finished, installing and fixing the unit segment;

and 5: and 4, after the step 4 is finished, the installation of one unit segment is finished, and the arrangement 1-4 is repeated until all the unit segments of the arch rib beam are hoisted and installed at corresponding positions.

2. The method for installing the flying swallow type arch bridge arch rib cross beam as claimed in claim 1, wherein in the step 1, after the corresponding unit segment to be hoisted is selected, an auxiliary adjusting device is installed on the unit segment to be hoisted.

3. The method for installing the flying swallow type arch bridge arch rib cross beam according to claim 1, wherein before the step 2 is started, trial hoisting is required, after the hoisting equipment is required to be connected with the corresponding unit section, the hoisting equipment moves, the hoisted unit section is suspended and stagnated for 15 minutes, and if the hanging strip in the hoisting equipment is not abnormal, the corresponding unit section is hoisted continuously.

4. The method for installing the flying swallow type arch bridge arch rib cross beam as claimed in claim 2, wherein the hoisting equipment adjusts the position of the hoisted unit section, and the hoisting system in the hoisting equipment adjusts the placing position of the hoisted unit section.

5. The method as claimed in claim 1, wherein adjacent said unit segments are connected by welding.

6. A method of installing a flying swallow type arch bridge arch rib crossbeam as claimed in claim 4, wherein a hoisting system is used for adjusting the unit segment placement position; the auxiliary adjusting device is externally connected with an adjusting jack, and the auxiliary adjusting device and the adjusting jack are used for fine adjustment of the arrangement position of the corresponding unit section.

7. The method for installing the flying swallow type arch bridge arch rib cross beam according to claim 1, wherein in the step 1, a lifting lug mechanism is arranged on the selected unit segment, the lifting lug mechanism comprises a lifting lug main plate, and lateral stiffening plates are arranged on the lateral surfaces of the lifting lug main plate; the lifting lug mechanism is connected with the hoisting equipment.

8. The method of installing a flying swallow type arch bridge arch rib crossbeam according to claim 1, wherein each unit section in the arch rib crossbeam is formed by splicing a plurality of plate units.

9. The method of claim 1, wherein step 4 is performed by requiring placement of support posts at the bridge site for supporting the arch rib beam.

10. The method of claim 9, wherein the support pile comprises a plurality of steel upright tubes, and a top pile plate is disposed on the steel upright tubes, and a plurality of stiffening plate members are disposed between the top pile plate and the steel upright tubes.

Images