CN113718653B

CN113718653B - Pushing construction method for curved beam

Info

Publication number: CN113718653B
Application number: CN202110976440.0A
Authority: CN
Inventors: 赵莹
Original assignee: Wuhan Jingjie Heavy Engineering Co ltd
Current assignee: Wuhan Jingjie Heavy Engineering Co ltd
Priority date: 2021-08-24
Filing date: 2021-08-24
Publication date: 2023-03-14
Anticipated expiration: 2041-08-24
Also published as: CN113718653A

Abstract

The invention provides a pushing construction method of a curved beam, which comprises the following steps: two first piers are built in advance, the two first piers are different in orientation and are Y-shaped integrally; building a first walking platform and a second walking platform; the first walking platform and the second walking platform are respectively positioned at two sides of a first pier and spliced to form a pushing walking platform; laying a plurality of self-walking pushing devices; building a curved beam, driving a plurality of self-walking type pushing devices to self-walk along the pushing walking platform, and pushing and moving the curved beam to the upper parts of the two first piers; and unloading Liang Congduo self-walking pushing devices from the curve and respectively supporting the self-walking pushing devices on two first piers. The pushing construction method of the curved beam can realize the technical effects of pushing and unloading the curved Liang Dingqi by matching the cushion layer and the temporary supporting layer through the plurality of self-walking pushing devices, can avoid the obstruction of piers with inconsistent orientation below the curved beam, and can be suitable for pushing construction of curved beams of different types.

Description

Pushing construction method for curved beam

Technical Field

The invention relates to the technical field of bridge construction, in particular to a pushing construction method for a curved beam.

Background

When a main beam spanning an existing highway or railway is constructed, adverse effects on traffic can be caused if hoisting equipment is adopted to hoist a beam structure below a bridge under construction. Under the circumstances, the pushing construction method has been rapidly developed in bridge construction due to its advantage of less influence on existing lines.

However, in the current actual construction, the pushing construction method is generally used for the construction of a straight beam. Due to the limitation of terrain, some beam sections crossing the existing road or railway need to be constructed into curved shapes. When the existing pushing equipment is used for pushing the curved beam, the curved beam is usually blocked by the pier in the pushing direction.

In order to solve the above problems, CN201911379142.2 provides a pushing structure and a pushing method for a curved bridge with a small curvature radius, wherein a sliding rail concentric with an arc-shaped main beam is adopted, and a pushing device is used for pushing the arc-shaped main beam to slide on the sliding rail. The technical scheme can only solve the problem of pushing the arc-shaped main beam and cannot be applied to pushing the gentle curve beam. Meanwhile, in order to match the arc-shaped main beam, the slide rail needs to be specially designed and manufactured; and the specifications of the two rails of the slide rail are not consistent, and the two rails need to be manufactured respectively.

CN202110149225.3 proposes a complex curved beam upward pushing construction device and method, and adopts a scheme that a lifting beam device is matched with a pushing device to realize pushing of a curved beam. However, in the construction process, the technical scheme involves dismounting and mounting the platform for temporarily supporting the curved beam, and the construction process is complex; meanwhile, in the process of pushing the curved beam, the gravity center position of the curved beam deviates from the pushing center axis line, and the deviation rectification adjustment is required to be carried out continuously, so that the construction difficulty is high.

Disclosure of Invention

The invention provides a pushing construction method of a curved beam aiming at the technical problems.

The invention provides the following technical scheme:

the invention provides a pushing construction method of a curved beam, which comprises the following steps:

s0, pre-building two first piers, wherein one first pier is positioned on one side of the existing traffic line, and the other first pier is positioned on the other side of the existing traffic line; the orientation of the two first piers is different; the first bridge pier comprises a pier stud, and two supporting bodies are respectively built on the top surface of the pier stud; the two support bodies are arranged at intervals, so that the first bridge pier is integrally Y-shaped;

s1, building a first walking platform crossing the existing traffic line, and building a second walking platform and a beam construction platform; the beam construction platform comprises a foundation platform and a construction platform constructed above the foundation platform; the first walking platform and the second walking platform are respectively positioned at two sides of a first bridge pier, and the top surface of a pier column of the first bridge pier, the first walking platform, the second walking platform and the top surface of the base platform are spliced to form a pushing walking platform;

s2, distributing a plurality of self-walking pushing devices on the top surface of the basic platform; building a curved beam on the building platform, and then moving the curved beam to be right above the self-walking pushing equipment; then driving the self-walking pushing devices to self-walk along the pushing walking platform, so that the self-walking pushing devices push and move the curved beam to the upper parts of the two first piers;

and S3, unloading Liang Congduo self-walking pushing equipment from the curve and respectively supporting the curve on the supporting bodies of the two first piers.

In the incremental launching construction method of the curved beam, in the step S1, the beam construction platform further comprises a plurality of support columns, and the construction platform is supported on the foundation platform through the plurality of support columns; the construction platform is provided with a gap; the self-walking pushing devices are arranged in a collinear way and are divided into a first group and a second group; the self-walking pushing equipment in the first group and the self-walking pushing equipment in the second group are alternately arranged;

the step S2 comprises the following steps:

step Sa2.1, after the curve beam is moved to be right above the self-walking pushing devices and is supported on the building platform across the gap, the self-walking pushing devices in the first group are adopted to pass through the gap to separate the curve beam from the building platform by the curve Liang Dingqi;

step Sa2.2, additionally arranging a cushion layer on the top of the self-walking pushing equipment in the second group; then, the self-walking pushing equipment in the second group is adopted to separate the curve Liang Dingqi from the self-walking pushing equipment in the first group through the gap;

and Sa2.3, self-walking pushing equipment in the first group and the second group is synchronously driven to self-walk, so that the self-walking pushing equipment in the second group pushes and moves the curved beam to the upper parts of the two first piers.

In the pushing construction method of the curved beam, in the step S1, the gap extends along the extending direction of the second walking platform; the building platform is provided with a linear first sliding chute extending along the gap and a curved second sliding chute; the first sliding groove and the second sliding groove have the same starting point; the curved beam comprises a bent part and a flat part;

step S2 further includes:

step Sb2.1, hoisting a bending part onto the building platform, and driving the bending part to slide to a preset position along the second sliding groove and the first sliding groove in sequence;

step Sb2.2, hoisting a straight part onto the construction platform, and driving the straight part to slide along the first sliding groove so as to be in butt joint with the bending part;

and step Sb2.3, fixedly connecting the bent part and the straight part together.

In the incremental launching construction method of the curved beam, in the step Sb2.3, the curved part and the straight part are connected through one or combination of a plurality of connection modes of welding, riveting, threaded connection, bonding, pin connection, lock catch connection and insertion connection.

In the pushing construction method of the curved beam, the curved beam is a moderate curved beam or a circular arc beam.

In the incremental launching construction method of the curved beam, in step sb2.1, the bending part is provided with the first detachable limiting block which can slide in the second sliding groove, and the bending part slides along the second sliding groove under the driving action of power equipment;

then the first detachable limiting block is detached, and then the bending part is driven by power equipment to slide along the first sliding groove by installing a second detachable limiting block which can slide in the first sliding groove on the bending part;

in step sb2.2, the third removable stopper which can slide in the first sliding groove is mounted on the straight portion, and the straight portion slides along the first sliding groove under the driving action of the power equipment.

In the pushing construction method of the curved beam of the present invention, the step S3 further includes:

3.1, when the plurality of self-walking pushing devices push and move the curved beam above the two first piers, respectively building fixed supporting layers on all supporting bodies of the two first piers and the second walking platform, and respectively adding temporary supporting layers on all the fixed supporting layers;

3.2, driving a plurality of self-walking pushing devices to drop the curved beams so that the curved beams are respectively supported on the temporary supporting layers below the curved beams;

3.3, removing the cushion layer on the self-walking pushing equipment in the second group; then, the self-walking pushing equipment in the first group and the self-walking pushing equipment in the second group are synchronously driven to self-walk, so that the self-walking pushing equipment in the first group and the self-walking pushing equipment in the second group leave from the position under the curved beam;

step 3.4, arranging a plurality of jacks on the top surfaces of the pier columns of the two first piers and the second walking platform respectively; synchronously driving a plurality of jacks to lift the curve Liang Dingqi so as to lift the curve beam from the temporary supporting layer;

and 3.5, removing all temporary supporting layers below the curved beam, driving a plurality of jacks to drop the curved beam, and respectively supporting the curved beam on the fixed supporting layer below the curved beam.

The invention provides a pushing construction method of a curved beam, which can realize the technical effects of pushing and unloading the curved Liang Dingqi by a plurality of self-walking pushing equipment in cooperation with a cushion layer and a temporary supporting layer.

Drawings

The invention is further described below with reference to the accompanying drawings:

fig. 1 is a schematic state diagram showing step S0 of the incremental launching construction method for a curved beam according to the embodiment of the present invention;

fig. 2 shows a schematic view in another direction of step S0 of the pushing construction method of the curved beam shown in fig. 1;

fig. 3 shows a schematic view in a further direction of step S0 of the pushing construction method of the curved beam shown in fig. 1;

FIG. 4 shows a schematic structural view of the self-propelled jacking device shown in FIG. 1;

fig. 5 is a partially enlarged view of a portion a in a state of step S0 of the pushing construction method for a curved beam shown in fig. 1;

fig. 6 is a schematic diagram illustrating state changes of steps of pushing and moving a curved beam by a plurality of self-walking pushing devices in the pushing construction method for the curved beam illustrated in fig. 1;

fig. 7 shows a schematic view of the self-walking jacking device in the second group for jacking and moving the curved beam above two first piers;

fig. 8 shows a schematic view of fig. 7 showing the curved beam pushing movement of the self-propelled pushing device in the second group over two first piers in another direction;

FIG. 9 is a schematic view of the self-propelled jacking devices in the second set in FIG. 7 in yet another direction for jacking the curved beam above two first piers;

FIG. 10 is a schematic view showing the state change of the steps of building a curved beam on a building platform and then moving the curved beam directly above a plurality of self-propelled jacking devices;

fig. 11 shows a schematic view of the state of the step 3.1 of the pushing construction method of the curved beam shown in fig. 1;

FIG. 12 is a partial enlarged view of a portion B in the step state shown in FIG. 11;

FIG. 13 is a schematic view showing the state of the step of step 3.2 of the pushing construction method for a curved beam shown in FIG. 1;

FIG. 14 is a partial enlarged view of a portion C in the step state shown in FIG. 13;

FIG. 15 is a schematic diagram showing the state of the step of removing the cushion layer in step 3.3 of the pushing construction method for the curved beam shown in FIG. 1;

fig. 16 shows a schematic view of a first step state of driving the self-propelled jacking device to self-propel away from directly below the curved beam in step 3.3 of the jacking construction method for the curved beam shown in fig. 1;

fig. 17 shows a schematic view of the state of a second step of driving the self-propelled jacking device to move away from the position right below the curved beam in step 3.3 of the jacking construction method for the curved beam shown in fig. 1;

fig. 18 shows a schematic view of the driving self-walking type pushing equipment in step 3.3 of the pushing construction method for the curved beam shown in fig. 1 after the self-walking type pushing equipment leaves from the position right below the curved beam in a self-walking manner;

fig. 19 is a schematic view showing a state where a plurality of jacks are respectively provided on the coping of the pier of two first piers and the second walking platform;

FIG. 20 is a schematic view of the state of the curve Liang Dingqi pushed by a plurality of jacks in step 3.4 of the pushing construction method for the curved beam shown in FIG. 1;

FIG. 21 is a partial enlarged view of the portion D in the step state shown in FIG. 20;

FIG. 22 shows a schematic view of the situation where all temporary support layers under the curved beams are removed;

fig. 23 is a schematic view showing the state of a step of driving a plurality of jacks to drop the curved beam and respectively supporting the curved beam on the fixed supporting layer therebelow in step 3.5 of the pushing construction method for the curved beam shown in fig. 1;

FIG. 24 is a partial enlarged view of section E in the step state shown in FIG. 23;

fig. 25 shows a step state diagram of step 3.6 of the curved beam pushing construction method shown in fig. 1.

Detailed Description

In order to make the technical solutions, technical objects, and technical effects of the present invention clearer so as to enable those skilled in the art to understand and implement the present invention, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Specifically, the incremental launching construction method for the curved beam in the embodiment includes the following steps:

step S0, as shown in fig. 1 to 3, fig. 1 shows a state diagram of step S0 of the incremental launching construction method for a curved beam according to the embodiment of the present invention; fig. 2 shows a schematic view in another direction of step S0 of the pushing construction method of the curved beam shown in fig. 1; fig. 3 shows a schematic view in a further direction of step S0 of the pushing construction method of the curved beam shown in fig. 1; pre-constructing two first piers 100, wherein one first pier 100 is positioned at one side of an existing traffic line, and the other first pier 100 is positioned at the other side of the existing traffic line; the orientations of the two first piers 100 are different; the first pier 100 comprises a pier stud 110, and two supporting bodies 120 are respectively built on the top surface of the pier stud 110; the two supports 120 are arranged at intervals, so that the first pier 100 is in a Y shape as a whole;

in this step, the first pier 100 is a long-term building, and the existing traffic route may be a road, a railway, or a waterway. Two first piers 100 are used to support the curved portion of the curved girder in cooperation.

Step S1, as shown in fig. 1 to 3, building a first walking platform 200 crossing the existing traffic line, and building a second walking platform 300 and a beam construction platform 400; the girder construction platform 400 includes a foundation platform 410 and a construction platform 420 constructed above the foundation platform 410; the first walking platform 200 and the second walking platform 300 are respectively positioned at two sides of a first pier 100, and the top surface of the pier column 110 of the first pier 100, the top surfaces of the first walking platform 200, the second walking platform 300 and the base platform 410 are spliced to form a pushing walking platform;

in this step, the first traveling platform 200 includes a temporary pier 210 and a first support table 220 erected on the temporary pier 210. It is understood that there are a plurality of the temporary piers 210, and the plurality of temporary piers 210 are respectively constructed at both sides of the existing traffic line. The first support table 220 spans an existing traffic line by being supported on the plurality of temporary piers 210, respectively.

The second walking platform 300 includes a temporary walking platform 310, and in this embodiment, the second walking platform 300 further includes a second pier 320; the second pier 320 is the same as the first pier 100 in structural shape, and also has a pier 110 and a support 120 for supporting a main beam, in this embodiment, the second pier 320 adjacent to the first pier 100 is also matched with the first pier 100 to support a curved beam; the temporary walking platform 310 is provided in plurality and is connected between the first pier 100 and the second pier 320, between two adjacent second piers 320 (in the case where there are a plurality of second piers 320), and between the second pier 320 and the girder construction platform 400. In other embodiments, the second walking platform 300 may not include the second pier 320. In this case, the temporary walking platform 310 is connected between the first pier 100 and the girder construction platform 400.

Further, in this embodiment, the beam construction platform 400 further includes a plurality of support columns 430, and the construction platform 420 is supported on the foundation platform 410 by the plurality of support columns 430; the construction platform 420 is provided with a gap 421; in this embodiment, the gap 421 extends along the extending direction of the second walking platform 300. The construction platform 420 is provided with a linear first sliding chute 422 extending along the gap 421 and a curved second sliding chute 423; the first and second sliding

grooves

422 and 423 have the same starting point.

Step S2, as shown in FIG. 1-FIG. 3, a plurality of self-propelled thrusting devices 500 are arranged on the top surface of the base platform 410; building the curved beam 600 on the building platform 420, and then moving the curved beam 600 right above the plurality of self-propelled jacking devices 500; driving the self-walking pushing devices 500 to self-walk along the pushing walking platform, so that the self-walking pushing devices 500 push and move the curved beam 600 to the position above the two first piers 100;

in the present embodiment, as shown in fig. 4, fig. 4 shows a schematic structural view of the self-walking jacking device shown in fig. 1. The self-propelled jacking device 500 integrates jacking, jacking and deviation rectifying functions. Specifically, the self-propelled jacking device 500 comprises a sliding rail 510, a sliding table 520 slidably nested and matched with the sliding rail 510, a receiving groove 530 fixedly installed on the sliding table 520, a supporting member 540 slidably received in the receiving groove 530 and used for supporting the curved beam 600, a jacking cylinder 550 respectively connected with the sliding rail 510 and the receiving groove 530 and used for driving the receiving groove 530 to slide along the sliding rail 510, and a deviation-correcting cylinder 560 respectively connected with the receiving groove 530 and the supporting member 540 and used for driving the supporting member 540 to slide relative to the receiving groove 530; a through hole is formed in the sliding table 520; the self-walking type pushing sliding device further comprises a jacking oil cylinder 570 which is arranged at the bottom of the accommodating groove 530 and penetrates through the through hole; when the jacking cylinder 570 is in the retracted state, the bottom surface of the jacking cylinder 570 is positioned above the bottom surface of the sliding rail 510; when the lift cylinder 570 is in the extended state, the bottom surface of the slide rail 510 is positioned above the bottom surface of the lift cylinder 570. With the self-propelled jacking device 500, when the jacking cylinder 570 is in the retracted state, the sliding rail 510 is supported on the reference surface, and the accommodating groove 530 is slidable relative to the sliding rail 510 by the jacking cylinder 550. When the jacking cylinder 570 is in the extended state, the accommodating groove 530 is supported on the reference surface by the jacking cylinder 570, and the sliding rail 510 is slidable relative to the accommodating groove 530 by the jacking cylinder 550. The self-walking function of the self-walking pushing apparatus can be realized by the sliding of the receiving groove 530 relative to the sliding rail 510 and the sliding of the sliding rail 510 relative to the receiving groove 530.

In this step, a plurality of self-propelled jacking devices 500 are arranged in a line, and the plurality of self-propelled jacking devices 500 are divided into a first group and a second group; the self-propelled jacking devices 500 of the first and second sets alternate. As shown in fig. 5, fig. 5 is a partially enlarged view of a portion a in a state of step S0 of the pushing construction method for the curved beam shown in fig. 1. As can be seen in FIG. 5, one or more of the self-propelled jacking devices 500 of the plurality of self-propelled jacking devices 500 are located in the indentation 421, but at a height below the top surface of the building platform 420. In this way, the self-propelled jacking devices 500 do not become an obstacle to movement behind the curved beam 600, and the curved beam 600 can move right above the plurality of self-propelled jacking devices 500.

As shown in fig. 6, fig. 6 is a schematic diagram illustrating a state change of a step of pushing and moving a curved beam 600 by a plurality of self-propelled pushing devices in the pushing construction method for a curved beam shown in fig. 1; to better illustrate the effect of the plurality of self-propelled jacking devices jacking the curved beam 600, the construction platform 420 is omitted from fig. 6. The step S2 comprises the following steps:

step sa2.1, after moving the curved beam 600 to a position directly above the plurality of self-propelled thrusting devices 500 and supporting the curved beam on the construction platform 420 across the gap 421 (as shown in the 1 st state diagram in fig. 6), using the self-propelled thrusting devices 500 in the first group to jack up the curved beam 600 through the gap 421 to separate the curved beam 600 from the construction platform 420 (as shown in the 2 nd state diagram in fig. 6);

in this step, when the curved beam 600 moves to a position directly above the plurality of self-propelled thrusting apparatuses 500 and is supported on the construction platform 420 across the gap 421, there is a distance between the curved beam 600 and the plurality of self-propelled thrusting apparatuses 500 due to the construction platform 420, as shown in the sub-state diagram 1 in fig. 6.

It will be appreciated that the technical effect of jacking the curved beam 600 is achieved by actuating the jacking cylinder 570 of the self-propelled jacking devices 500 of the first group. During the jacking process, the stress condition of the self-walking jacking devices 500 in the first group and the straight condition of the bottom surface of the curved beam 600 can be kept concerned, and the overturning risk of the curved beam can be verified under the condition that the curved beam 600 is ensured not to overturn. In this process, the curved beam 600 is prevented from overturning by the construction platform 420.

Step Sa2.2, adding a cushion layer 580 on the top of the self-propelled jacking device 500 in the second group (as shown in the 3 rd state diagram in FIG. 6); then, the self-walking pushing equipment 500 in the second group is used for jacking the curved beam 600 through the gap 421 so as to separate the curved beam 600 from the self-walking pushing equipment 500 in the first group (as shown in the 4 th state diagram in fig. 6);

in this step, the cushion layer 580 is fixed to the supporting member 540 of the self-propelled pusher apparatus 500. Meanwhile, it can be understood that the self-propelled jacking devices 500 in the second group are still at a distance from the curved beam 600 just after the cushion 580 is added on the top of the self-propelled jacking devices. However, when the self-walking jacking devices 500 of the second group are lifted by the respective jacking cylinders 570 and jack up the curved beam 600 by the mat 580, the bottom surface of the curved beam 600 may be separated from the self-walking jacking devices 500 of the first group due to the height of the mat 580. It can be understood that, in the process of jacking the curved beam 600 by using the self-walking pushing equipment 500 in the second group through the gap 421, the stress condition of the self-walking pushing equipment 500 in the second group and the flatness condition of the bottom surface of the curved beam 600 are kept concerned, and the overturning risk of the curved beam is verified under the condition that the curved beam 600 is ensured not to overturn. In this process, the curved beam 600 is still prevented from overturning by the construction platform 420. In the process that the self-walking thrusting devices 500 of the first group and the second group respectively jack up the curved beam 600 twice, if the curved beam has a risk of overturning, the position of the individual self-walking thrusting device 500 for jacking up the curved beam needs to be adjusted.

And step Sa2.3, synchronously driving the self-walking pushing devices 500 in the first group and the second group to self-walk (as shown in a state diagram from the 5 th to the 8 th in FIG. 6, and sequentially repeating the steps shown in the state diagram from the 5 th to the 8 th in FIG. 6), so that the self-walking pushing devices 500 in the second group push and move the curved beam 600 to the position above the two first piers 100, as shown in FIGS. 7-8. Here, (fig. 7 shows a state diagram when the self-walking pushing apparatus in the second group pushes the curved beam to move over two first piers, fig. 8 shows a state diagram when the self-walking pushing apparatus in the second group pushes the curved beam to move over two first piers in the other direction, and fig. 9 shows a state diagram when the self-walking pushing apparatus in the second group pushes the curved beam to move over two first piers in the other direction).

In this step, under the precondition that the self-propelled pushing devices 500 of the first group and the second group successively jack up the curve beam 600 twice respectively and check the overturning risk of the curve beam, the self-propelled pushing devices 500 of the first group and the second group synchronously move, and in the process that the curve beam moves along with the self-propelled pushing devices 500 self-propelled, the overturning risk of the curve beam can be controlled under the condition that the external environmental conditions are not changed.

Fig. 10 is a schematic view showing a state change of a step of building a curved beam on a building platform and then moving the curved beam to a position directly above a plurality of self-propelled jacking devices; the curved beam 600 is a gently curved beam or a circular arc beam. The curved beam 600 includes a curved portion 610 and a flat portion 620; here, the number of the curved portion 610 and the flat portion 620 is not limited and may be one or more, and when there are a plurality of curved portions 610 and flat portions 620, the plurality of curved portions 610 are sequentially spliced together, the plurality of flat portions 620 are sequentially spliced together, and finally the entirety of the plurality of curved portions 610 and the entirety of the plurality of flat portions 620 are fixedly spliced together. In this process, the straight portion 620 is mainly used for pushing by the self-propelled pushing apparatus 500, and therefore, the assembling between the bending portion 610 and the straight portion 620 is critical, and therefore, the assembling step between the bending portion 610 and the straight portion 620 will be described in detail below, and the assembling step between the plurality of straight portions 620 and the assembling step between the plurality of bending portions 610 may refer to the assembling step between the bending portion 610 and the straight portion 620, and thus, the description thereof is omitted. Specifically, step S2 further includes:

step Sb2.1, hoisting a bending part 610 to the building platform 420 (as shown in a 1 st secondary state diagram or a 3 rd secondary state diagram in fig. 10), and driving the bending part 610 to slide to a preset position along the second sliding groove 423 and the first sliding groove 422 in sequence (as shown in a2 nd secondary state diagram or a 4 th secondary state diagram in fig. 10);

in step sb2.1, the bending portion 610 is made to slide along the second sliding groove 423 by installing a first detachable stopper (not shown) on the bending portion 610, which is slidable in the second sliding groove 423, and by a driving action of a power device;

the first detachable limiting block is detached again, and then the bending part 610 slides along the first sliding groove 422 under the driving action of power equipment by installing a second detachable limiting block (not shown in the figure) which can slide in the first sliding groove 422 on the bending part 610;

here, the first detachable stopper functions to restrict the bent portion 610 from being separated from the second slide groove 423, and the second detachable stopper functions to restrict the bent portion 610 from being separated from the first slide groove 422.

Step Sb2.2, hoisting a straight part 620 onto the construction platform 420 (as shown in the 5 th sub-state diagram in FIG. 10), and driving the straight part 620 to slide along the first sliding groove 422 to interface with the bending part 610 (as shown in the 6 th sub-state diagram in FIG. 10 or as shown in the 7 th sub-state diagram in FIG. 10);

in step sb2.2, the straight portion 620 slides along the first sliding groove 422 under the driving action of the power device by installing a third removable stopper (not shown) on the straight portion 620, which is slidable in the first sliding groove 422.

Here, the third removable stopper functions to restrict the flat portion 620 from being separated from the first chute 422.

Step sb2.3, fixedly connecting the curved portion 610 and the flat portion 620 together.

In step sb2.3, the curved portion 610 and the flat portion 620 are connected by one or a combination of welding, riveting, screwing, bonding, pinning, latching, and plugging.

In step S2 of the present embodiment, by using the first and second sliding

grooves

422 and 423 having the same starting point, the sliding distance of the straight portion 620 and the curved portion 610 during the assembly process can be effectively reduced. Meanwhile, the straight part 620 and the bending part 610 can be produced in a factory, transported to a construction site, and hoisted to a construction platform through engineering equipment such as a bridge deck crane for assembly.

It will be appreciated that in other embodiments, the curved beams may be produced and built directly on the building platform.

Further, the curved beam 600 may be moved directly above the plurality of self-propelled jacking devices 500 through the first runner 422.

And S3, detaching the curved beam 600 from the plurality of self-propelled pushing devices 500, and respectively supporting the curved beam on the supporting bodies 120 of the two first piers 100.

Step S3 further includes:

step 3.1, when the plurality of self-walking thrusting devices 500 thrusts and moves the curved beam 600 to the position above the two first piers 100 (as shown in fig. 8), respectively building fixed supporting layers 130 on all supporting bodies 120 of the two first piers 100 and the second walking platform 300, and respectively adding temporary supporting layers 140 on all the fixed supporting layers 130, as shown in fig. 11 and fig. 12;

as shown in fig. 11 and 12, fig. 11 is a schematic view showing a step state of step 3.1 of the pushing construction method for the curved beam shown in fig. 1; fig. 12 is a partially enlarged view of a portion B in the step state shown in fig. 11. It can be seen that the first pier 100 constructed with the fixed support layer 130 and the temporary support layer 140 is still spaced apart from the curved girder 600. Further, in this step, the fixing support layer 130 is preferably a preform, so that the construction efficiency can be accelerated at the time of actual construction.

Step 3.2, the curved beam 600 is dropped by driving the plurality of self-propelled pushing devices 500, so that the curved beam 600 is supported on the temporary supporting layer 140 below the curved beam respectively, as shown in fig. 13 and 14;

as shown in fig. 13 and 14, fig. 13 is a schematic view showing the state of the step of step 3.2 of the pushing construction method for the curved beam shown in fig. 1; fig. 14 is a partially enlarged view of a portion C in the step state shown in fig. 13. In this step, the plurality of self-propelled jacking devices 500 and the curved beam 600 have a certain distance therebetween when the curved beams 600 are supported on the temporary supporting layer 140 therebelow, respectively.

Step 3.3, removing the cushion layer 580 on the self-propelled jacking device 500 in the second group, as shown in fig. 15; driving the self-walking jacking devices 500 in the first and second groups to self-walk synchronously, so that the self-walking jacking devices 500 in the first and second groups exit from right below the curved beam 600, as shown in fig. 16-18;

specifically, as shown in fig. 15, fig. 15 is a schematic view illustrating a state of a step of removing a cushion layer in step 3.3 of the pushing construction method for a curved beam shown in fig. 1; since there is a distance between the plurality of self-walking jacking devices 500 and the curved beam 600 by step 3.2, this provides space for removing the mat in this step.

As shown in fig. 16-18, fig. 16 is a schematic view showing a state of a first step of driving the self-walking pushing apparatus 500 to self-walk away from directly below the curved beam 600 in step 3.3 of the pushing construction method for the curved beam shown in fig. 1; fig. 17 is a schematic view showing a state of a second step of driving the self-propelled jacking equipment 500 to self-propel away from directly below the curved beam 600 in step 3.3 of the jacking construction method for the curved beam shown in fig. 1; fig. 18 is a schematic view showing a state after the self-walking pushing apparatus 500 is driven to self-walk away from a position right below the curved beam 600 in step 3.3 of the pushing construction method for the curved beam shown in fig. 1; it will be appreciated that in step 3.3, the self-propelled jacking devices 500 are spaced from the curved beams 600 in the self-propelled state when the curved beams 600 are supported on the temporary support layer 140 therebelow, respectively. The self-walking jacking device 500 shown in fig. 16-17 is in a reverse self-walking motion to the self-walking jacking device 500 shown in fig. 6.

Step 3.4, respectively arranging a plurality of jacks 800 on the top surfaces of the piers 110 of the two first piers 100 and the second walking platform 300, as shown in fig. 19; synchronously driving a plurality of jacks 800 to jack up the curved beam 600 so as to lift the curved beam 600 from the temporary support layer 140, as shown in fig. 20-21;

in this step, since the first pier 100 and the second pier 320 are long-term buildings and have high safety and stability, the plurality of jacks 800 are respectively disposed on the top surfaces of the piers 110 of the first pier 100 and the second pier 320. It is understood that a plurality of jacks 800 may be disposed on the first and

second walking platforms

200 and 300.

As shown in fig. 20 to 21, fig. 20 is a schematic view illustrating a state of a step of jacking the curved beam 600 by a plurality of jacks 800 in step 3.4 of the pushing construction method for the curved beam shown in fig. 1; FIG. 21 is a partial enlarged view of the portion D in the step state shown in FIG. 20; the curved beam 600 is jacked up by a plurality of jacks 800 such that a gap is spaced between the curved beam 600 and the temporary support layer 140.

Step 3.5, removing all the temporary support layers 140 below the curved beams 600, as shown in fig. 22, and driving a plurality of jacks 800 to drop the curved beams 600, so that the curved beams 600 are respectively supported on the fixed support layers 130 below the curved beams 600, as shown in fig. 23-24.

Specifically, in this step, as shown in fig. 23 to 24, fig. 23 is a schematic view showing a state of a step of driving a plurality of jacks to drop the curved beam and respectively supporting the curved beam on the fixed supporting layer therebelow in step 3.5 of the pushing construction method for the curved beam shown in fig. 1; fig. 24 is a partially enlarged view of a portion E in the step state shown in fig. 23. It will be appreciated that, after the plurality of jacks 800 are driven to drop the curved beams 600 so that the curved beams 600 are respectively supported on the fixed support layers 130 therebelow, a gap is formed between the jacks 800 and the curved beams 600.

Step 3.6, the plurality of jacks 800 are removed, and after the curved beam jacking construction is completed, the first walking platform 200 can be detached, as shown in fig. 25.

According to the pushing construction method of the curved beam, the technical effects of pushing and dismounting the curved Liang Dingqi can be achieved by the self-walking pushing equipment in cooperation with the cushion layer and the temporary supporting layer, the technical scheme can avoid the obstruction of piers with inconsistent orientation below the curved beam, and meanwhile, the pushing construction method can be suitable for different types of curved beams.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A pushing construction method of a curved beam is characterized by comprising the following steps:

s0, constructing two first piers (100) in advance, wherein one first pier (100) is positioned on one side of the existing traffic line, and the other first pier (100) is positioned on the other side of the existing traffic line; the orientations of the two first bridge piers (100) are different; the first bridge pier (100) comprises a pier column (110), and two support bodies (120) are respectively built on the top surface of the pier column (110); the two support bodies (120) are arranged at intervals, so that the first pier (100) is integrally Y-shaped;

s1, building a first walking platform (200) crossing the existing traffic line, and building a second walking platform (300) and a beam construction platform (400); the beam construction platform (400) comprises a foundation platform (410) and a construction platform (420) constructed above the foundation platform (410); the first walking platform (200) and the second walking platform (300) are respectively positioned at two sides of a first pier (100), and the top surface of a pier column (110) of the first pier (100), the first walking platform (200), the second walking platform (300) and the top surface of a base platform (410) are spliced to form a pushing walking platform;

s2, distributing a plurality of self-walking pushing devices (500) on the top surface of the basic platform (410); building a curved beam (600) on the building platform (420), and then moving the curved beam (600) to be directly above the plurality of self-propelled jacking devices (500); then driving the self-walking pushing devices (500) to self-walk along the pushing walking platform, so that the self-walking pushing devices (500) push and move the curved beam (600) to the position above the two first piers (100); the self-walking type jacking device (500) comprises a sliding rail (510), a sliding table (520) which can be in relatively sliding nested fit with the sliding rail (510), an accommodating groove (530) fixedly installed on the sliding table (520), a supporting piece (540) which is slidably accommodated in the accommodating groove (530) and used for supporting the curved beam (600), jacking oil cylinders (550) which are respectively connected with the sliding rail (510) and the accommodating groove (530) and used for driving the accommodating groove (530) to slide along the sliding rail (510), and deviation rectifying oil cylinders (560) which are respectively connected with the accommodating groove (530) and the supporting piece (540) and used for driving the supporting piece (540) to slide relative to the accommodating groove (530); the sliding table (520) is provided with a through hole; the self-walking type pushing sliding device also comprises a jacking oil cylinder (570) which is arranged at the bottom of the accommodating groove (530) and penetrates through the through hole; when the jacking oil cylinder (570) is in a retraction state, the bottom surface of the jacking oil cylinder (570) is positioned above the bottom surface of the sliding track (510); when the jacking oil cylinder (570) is in an extending state, the bottom surface of the sliding track (510) is positioned above the bottom surface of the jacking oil cylinder (570);

and S3, unloading the curved beam (600) from the plurality of self-walking pushing devices (500) and respectively supporting the curved beam on the supporting bodies (120) of the two first piers (100).

2. The incremental launching construction method of the curved beam as claimed in claim 1, wherein in step S1, the beam construction platform (400) further comprises a plurality of supporting columns (430), and the construction platform (420) is supported on the foundation platform (410) through the plurality of supporting columns (430); a gap (421) is arranged on the construction platform (420); a plurality of self-propelled jacking devices (500) are arranged in a line, and the self-propelled jacking devices (500) are divided into a first group and a second group; the self-walking pushing devices (500) in the first group and the second group are alternately arranged;

the step S2 comprises the following steps:

step Sa2.1, after the curved beam (600) is moved to the position right above the self-walking pushing devices (500) and is supported on the building platform (420) across the gap (421), the self-walking pushing devices (500) in the first group are adopted to jack up the curved beam (600) through the gap (421) so as to separate the curved beam (600) from the building platform (420);

step Sa2.2, adding a cushion layer (580) on the top of the self-walking pushing equipment (500) in the second group; then the self-walking pushing equipment (500) in the second group is adopted to jack the curved beam (600) through the gap (421) so as to separate the curved beam (600) from the self-walking pushing equipment (500) in the first group;

and Sa2.3, synchronously driving the self-walking pushing devices (500) in the first group and the second group to self-walk, so that the self-walking pushing devices (500) in the second group push the curved beam (600) to move above the two first piers (100).

3. The incremental launching construction method of the curved beam as claimed in claim 2, wherein in step S1, the gap (421) extends along the extending direction of the second walking platform (300); the building platform (420) is provided with a linear first sliding chute (422) extending along the gap (421) and a curved second sliding chute (423); the first sliding chute (422) and the second sliding chute (423) have the same starting point; the curved beam (600) comprises a curved portion (610) and a flat portion (620);

step S2 further includes:

step Sb2.1, hoisting a bending part (610) to a building platform (420), and driving the bending part (610) to slide to a preset position along a second sliding groove (423) and a first sliding groove (422) in sequence;

step Sb2.2, hoisting a straight part (620) to a building platform (420), and driving the straight part (620) to slide along a first sliding groove (422) so as to be butted with a bending part (610);

and step Sb2.3, fixedly connecting the bent part (610) and the straight part (620) together.

4. The incremental launching construction method of the curved beam as claimed in claim 3, wherein in step Sb2.3, the curved part (610) and the flat part (620) are connected by one or a combination of welding, riveting, screwing, bonding, pinning, locking and plugging.

5. The incremental launching construction method of a curved beam as claimed in claim 3, wherein the curved beam (600) is a gentle curved beam or a circular arc beam.

6. The incremental launching construction method of the curved beam as claimed in claim 3, wherein in step Sb2.1, the bending part (610) is made to slide along the second sliding groove (423) by installing a first detachable limiting block on the bending part (610) and sliding in the second sliding groove (423) under the driving action of power equipment;

then the first detachable limiting block is detached, and then the bending part (610) slides along the first sliding groove (422) under the driving action of power equipment by installing a second detachable limiting block which can slide in the first sliding groove (422) on the bending part (610);

in step Sb2.2, a third detachable limiting block which can slide in the first sliding groove (422) is arranged on the straight part (620), and the straight part (620) slides along the first sliding groove (422) under the driving action of power equipment.

7. The incremental launching construction method of the curved beam as claimed in claim 1, wherein the step S3 further comprises:

3.1, when the curve beam (600) is pushed and moved to the position above the two first piers (100) by the self-walking pushing devices (500), respectively building fixed supporting layers (130) on all supporting bodies (120) of the two first piers (100) and the second walking platform (300), and respectively adding temporary supporting layers (140) on all the fixed supporting layers (130);

3.2, driving a plurality of self-walking pushing devices (500) to drop the curved beams (600) so that the curved beams (600) are respectively supported on the temporary supporting layers (140) below the curved beams;

3.3, removing the cushion layer (580) on the self-walking pushing equipment (500) in the second group; driving the self-walking thrusting devices (500) in the first group and the second group to self-walk synchronously again, so that the self-walking thrusting devices (500) in the first group and the second group leave from right below the curved beam (600);

3.4, respectively arranging a plurality of jacks (800) on the top surfaces of the piers (110) of the two first piers (100) and the second walking platform (300); synchronously driving a plurality of jacks (800) to jack up the curved beam (600) so as to lift the curved beam (600) from the temporary supporting layer (140);

and 3.5, removing all temporary supporting layers (140) below the curved beam (600), driving a plurality of jacks (800) to drop the curved beam (600), and respectively supporting the curved beam (600) on the fixed supporting layers (130) below the curved beam.