Construction method for dismantling double-navigation-hole continuous beam bridge through bridge girder erection machine

Abstract

The invention relates to a construction method for dismantling a double-navigable-hole continuous beam bridge by adopting a bridge erecting machine, and dismantling of a navigable-hole bridge span concrete beam comprises the following steps: S1, supporting legs of the bridge erecting machine on pier top blocks, hanging a beam section of a navigable-hole bridge span by utilizing a crown block, and symmetrically dismantling; s2, a crown block is used for moving the dismantled beam sections of the navigable hole bridge span to the beam face of the non-navigable hole bridge span along the bridge girder erection machine, and the beam sections are transported away from the bridge site through a beam section transport vehicle; s3, the navigation hole closure blocks are firstly dismantled through a bridge girder erection machine, and then the navigation hole middle pier T-structure beam sections and the navigation hole side pier T-structure beam sections are symmetrically dismantled; and S4, after the spanning beam section of the navigation hole bridge is dismantled, the bridge erecting machine moves forwards to the bridge floor position of the approach bridge through the supporting legs. Compared with the prior art, two crown blocks of the bridge girder erection machine are used for symmetrically completing dismantling of two navigation hole concrete beam sections; and the influence of the concrete beam on underbridge navigation in the dismantling process is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of bridge engineering construction, in particular to a construction method for dismantling a double-navigation hole continuous beam bridge by using a bridge erecting machine. Background Art

[0002] Cantilever cast concrete continuous beam bridge is a common bridge structure across inland waterways. When upgrading the waterway, the existing continuous beam bridge needs to be demolished due to limited spanning capacity. In the existing demolition technology, floating cranes are often used to demolish three-span continuous two-structure bridges. During the demolition process, the floating crane needs to occupy the navigable waters, which has a certain impact on normal navigation. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the above-mentioned prior art that the concrete beams affect the navigation under the bridge during the demolition process, and to provide a construction method for demolishing a double-navigation hole continuous beam bridge using a bridge erection machine, which solves the demolition construction difficulties of a double-navigation hole multi-span cantilever cast continuous beam bridge, avoids the impact of construction equipment such as floating cranes on navigation, ensures normal navigation under the bridge during the demolition process, and realizes the symmetrical demolition of a double-navigation hole cantilever cast box beam bridge.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] The present invention provides a construction method for dismantling a double-navigation hole continuous beam bridge by using a bridge erecting machine, wherein the legs of the bridge erecting machine are supported on the pier top blocks on both sides of the double-navigation hole to complete the dismantling of the concrete beam of the navigation hole bridge span, and a temporary support for the non-navigation hole is set up under the non-navigation hole bridge span to complete the dismantling of the non-navigation hole concrete beam; finally, the construction of a double-navigation hole multi-span cast-in-place suspended beam bridge is realized;

[0006] The removal of the concrete beams of the navigation bridge includes the following steps:

[0007] S1: Support the legs of the bridge erecting machine on the pier top block, use the overhead crane to hang the beam section of the navigation span, cut off the navigation span beam section along the construction segment dividing line of each beam section, and perform symmetrical demolition;

[0008] S2: Use an overhead crane to move the dismantled beam section of the navigation span along the bridge erection machine to the beam surface of the non-navigation span, and then use a beam section transport vehicle to transport it away from the bridge site;

[0009] S3: Use a bridge erection machine to first remove the closing block of the navigation hole, and then symmetrically remove the T-beam section of the middle pier of the navigation hole and the T-beam section of the side pier of the navigation hole;

[0010] S4: After the dismantling of the span section of the navigation bridge is completed, the bridge-erecting machine is moved forward to the bridge deck position through the outriggers. The entire construction process has no impact on the navigation under the bridge.

[0011] Furthermore, the overhead crane includes a No. 1 overhead crane for the bridge erecting machine and a No. 2 overhead crane for the bridge erecting machine.

[0012] Furthermore, the navigation hole closing block is close to the first navigation hole side pier.

[0013] Furthermore, the T-beam section of the middle pier of the navigation channel is close to the middle pier of the navigation channel.

[0014] Furthermore, the T-beam section of the navigation hole side pier is close to the second navigation hole side pier.

[0015] Furthermore, the legs of the bridge-erecting machine include: leg No. 1 of the bridge-erecting machine, leg No. 2 of the bridge-erecting machine, and leg No. 3 of the bridge-erecting machine; in S1 to S3, leg No. 1 of the bridge-erecting machine is arranged above the side pier of the first navigation hole, leg No. 2 of the bridge-erecting machine is arranged above the middle pier of the navigation hole, and leg No. 3 of the bridge-erecting machine is arranged above the side pier of the second navigation hole.

[0016] Furthermore, the bridge-building machine is composed of a pair of beams that are horizontally arranged and parallel to each other, and the top and bottom of the bridge-building machine are respectively provided with an upper slide rail and a lower slide rail along the length direction.

[0017] Furthermore, the top of the support leg of the bridge-building machine cooperates with the lower sliding rail at the bottom of the bridge-building machine through a separate sliding mechanism, and the support leg can reciprocate along the length direction of the bridge-building machine.

[0018] Furthermore, the legs of the bridge-building machine are connected with a longitudinal travel cylinder, and the longitudinal travel cylinder is arranged parallel to the extension direction of the bridge-building machine.

[0019] Furthermore, the overhead travelling crane is arranged on the top of the bridge erecting machine and cooperates with the upper slide rail of the bridge erecting machine through an upper translation mechanism.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] The present invention aims at the technical difficulty of dismantling a double-navigation hole multi-span continuous beam bridge, and proposes a construction method for dismantling a double-navigation hole continuous beam bridge using a bridge erecting machine. The two overhead cranes of the bridge erecting machine are used to symmetrically complete the dismantling of the two navigation hole concrete beam segments. After the concrete beam segment is cut off, it is moved to the non-navigation hole beam surface by the overhead crane and transported away by a transport vehicle. This construction method avoids the impact of the concrete beam on the navigation under the bridge during the dismantling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the erection of the non-navigable hole bracket and the installation of the bridge erection machine in Example 1;

[0023] Figure 2 This is a schematic diagram of cutting the concrete beam of the closure section of the navigation hole in Example 1;

[0024] Figure 3 This is a schematic diagram of removing the concrete beam of the closure section of the navigation hole in Example 1;

[0025] Figure 4 This is a schematic diagram of the transportation of the concrete beam of the closure section of the navigation hole in Example 1;

[0026] Figure 5 This is a schematic diagram of the symmetrical removal of the T-beam segments of the middle pier of the navigation hole in Example 1;

[0027] Figure 6 This is a schematic diagram of the transport of the T-beam segment of the middle pier of the navigation hole in Example 1;

[0028] Figure 7 This is a schematic diagram of the removal of the T-beam segment of the navigation hole side pier in Example 1;

[0029] Figure 8 This is a schematic diagram showing the completion of dismantling of the double navigation hole segment in Example 1;

[0030] Fig. 9 This is a schematic diagram of the bridge erection machine moving through the hole in Example 1;

[0031] Fig.10 This is a schematic diagram of the bridge erecting machine switching legs in Example 1;

[0032] Fig.11 This is a schematic diagram of the bridge erecting machine continuing to move forward in Example 1;

[0033] Fig.12 This is a schematic diagram of removing the bridge-building machine in Example 1.

[0034] Figure markings: 1. Double-navigable hole multi-span cantilever beam bridge, 2. Navigable hole bridge span, 3. Non-navigable hole bridge span, 4. Segment dividing line, 5. First navigation hole side pier, 6. Navigable hole middle pier, 7. Second navigation hole side pier, 8. Bridge-erecting machine, 9. Non-navigable hole temporary support, 10. Beam section transport vehicle, 11. Approach bridge deck, 1-4. Pier top block, 2-1. Navigable hole closing block, 2-2. Navigable hole middle pier T-beam section, 2-3. Navigable hole side pier T-beam section, 8-1. No. 1 overhead crane of bridge-erecting machine, 8-2. No. 2 overhead crane of bridge-erecting machine, 8-3. No. 1 leg of bridge-erecting machine, 8-4. No. 2 leg of bridge-erecting machine, 8-5. No. 3 leg of bridge-erecting machine. DETAILED DESCRIPTION

[0035] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Component models, material names, connection structures, control methods, algorithms and other features not clearly described in this technical solution are all considered to be common technical features disclosed in the prior art.

[0036] Example 1

[0037] This embodiment provides a construction method for dismantling a double-navigation hole continuous beam bridge by using a bridge erecting machine. The legs of the bridge erecting machine 8 are supported on the pier top blocks 1-4 on both sides of the double-navigation hole to complete the dismantling of the concrete beam of the navigation hole bridge span 2. A non-navigation hole temporary support 9 is set up under the non-navigation hole bridge span 3 to complete the dismantling of the non-navigation hole concrete beam; finally, the construction of the double-navigation hole multi-span cantilever beam bridge 1 is realized;

[0038] The removal of the concrete beam of span 2 of the navigation bridge includes the following steps:

[0039] S1: Figures 1 to 3 As shown, the legs of the bridge erection machine 8 are supported on the pier top blocks 1-4, and the beam sections of the navigation hole bridge span 2 are suspended by the overhead crane, and the navigation hole beam sections are cut off along the construction segment dividing lines 4 of each beam section for symmetrical demolition;

[0040] S2: Figure 4 As shown, the dismantled beam section of the navigation span 2 is moved to the beam surface of the non-navigation span 3 along the bridge erection machine 8 by using an overhead crane, and then transported away from the bridge position by a beam section transport vehicle 10;

[0041] S3: Figures 5 to 8 As shown, the navigation hole closing block 2-1 is first removed by using the bridge erecting machine 8, and then the navigation hole middle pier T-beam section 2-2 and the navigation hole side pier T-beam section 2-3 are symmetrically removed;

[0042] S4: Figures 9 to 12 As shown, after the removal of the beam section 2 of the navigation channel bridge is completed, the bridge erection machine 8 is moved forward to the bridge deck 11 through the legs, and the whole construction process does not affect the navigation under the bridge. After the construction is completed, the bridge erection machine 8 is removed.

[0043] In a specific implementation, the overhead crane includes a bridge erecting machine No. 1 overhead crane 8-1 and a bridge erecting machine No. 2 overhead crane 8-2.

[0044] In a specific implementation, the navigation hole closing block 2 - 1 is close to the first navigation hole side pier 5 .

[0045] In a specific implementation, the navigation channel middle pier T-beam section 2-2 is close to the navigation channel middle pier 6.

[0046] In a specific implementation, the navigation channel side pier T-beam section 2 - 3 is close to the second navigation channel side pier 7 .

[0047] In a specific implementation, the legs of the bridge-erecting machine 8 include: bridge-erecting machine leg No. 1 8-3, bridge-erecting machine leg No. 2 8-4, and bridge-erecting machine leg No. 3 8-5; in S1 to S3, the bridge-erecting machine leg No. 1 8-3 is arranged above the first navigation hole side pier 5, the bridge-erecting machine leg No. 2 8-4 is arranged above the middle pier 6 of the navigation hole, and the bridge-erecting machine leg No. 3 8-5 is arranged above the second navigation hole side pier 7.

[0048] In a specific implementation, the bridge-building machine 8 is composed of a pair of horizontally arranged and mutually parallel beams, and the top and bottom of the bridge-building machine 8 are respectively provided with an upper slide rail and a lower slide rail along the length direction.

[0049] In a specific embodiment, the top of the support leg of the bridge-building machine 8 cooperates with the lower sliding rail at the bottom of the bridge-building machine 8 through a separate sliding mechanism, and the support leg can reciprocate along the length direction of the bridge-building machine 8.

[0050] In a specific implementation, the legs of the bridge erecting machine 8 are connected with a longitudinal travel cylinder, and the longitudinal travel cylinder is arranged parallel to the extension direction of the bridge erecting machine 8 .

[0051] In a specific implementation, the overhead crane is arranged on the top of the bridge erecting machine 8 and cooperates with the upper slide rail of the bridge erecting machine 8 through an upper translation mechanism.

[0052] Components not described in detail in this embodiment are all existing components that can be purchased through public channels.

[0053] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A construction method for dismantling a double-navigation continuous beam bridge using a bridge erection machine, characterized in that: The legs of the bridge erection machine (8) are supported on the pier top blocks (1-4) on both sides of the double navigation holes to complete the removal of the concrete beam of the navigation hole bridge span (2), and a temporary support (9) for the non-navigation hole is set up under the non-navigation hole bridge span (3) to complete the removal of the concrete beam of the non-navigation hole; finally, the construction of the double navigation hole multi-span cast-in-place suspended beam bridge (1) is realized; The removal of the concrete beam of the navigation span (2) includes the following steps: S1: Support the legs of the bridge erection machine (8) on the pier top blocks (1-4), use the overhead crane to hang the beam section of the navigation hole bridge span (2), cut off the navigation hole beam section along the construction segment dividing line (4) of each beam section, and perform symmetrical demolition; S2: Using an overhead crane, the dismantled beam section of the navigation span (2) is moved along the bridge erection machine (8) to the beam surface of the non-navigation span (3), and then transported away from the bridge site by a beam section transport vehicle (10); S3: using a bridge erecting machine (8) to first dismantle the navigation hole closing block (2-1), and then symmetrically dismantle the navigation hole middle pier T-beam section (2-2) and the navigation hole side pier T-beam section (2-3); S4: After the dismantling of the beam section of the navigation span (2) is completed, the bridge erection machine (8) is moved forward to the bridge deck (11) of the approach bridge through the outriggers. The entire construction process does not affect the navigation under the bridge.

2. The method for dismantling a double-navigation continuous beam bridge using a bridge erection machine according to claim 1, characterized in that: The overhead crane comprises a first overhead crane (8-1) for a bridge erecting machine and a second overhead crane (8-2) for a bridge erecting machine.

3. The construction method for dismantling a double-navigation continuous beam bridge using a bridge erection machine according to claim 1, characterized in that: The navigation hole closing block (2-1) is close to the first navigation hole side pier (5).

4. The method for dismantling a double-navigation continuous beam bridge using a bridge erection machine according to claim 1, characterized in that: The T-beam section (2-2) of the middle pier of the navigation channel is close to the middle pier (6) of the navigation channel.

5. The method for dismantling a double-navigation continuous beam bridge using a bridge erection machine according to claim 1, characterized in that: The navigation hole side pier T-beam section (2-3) is close to the second navigation hole side pier (7).

6. The method for dismantling a double-navigation continuous beam bridge using a bridge erection machine according to claim 1, characterized in that: The legs of the bridge erecting machine (8) include: a bridge erecting machine leg No. 1 (8-3), a bridge erecting machine leg No. 2 (8-4), and a bridge erecting machine leg No. 3 (8-5); in S1 to S3, the bridge erecting machine leg No. 1 (8-3) is arranged above the side pier (5) of the first navigation hole, the bridge erecting machine leg No. 2 (8-4) is arranged above the middle pier (6) of the navigation hole, and the bridge erecting machine leg No. 3 (8-5) is arranged above the side pier (7) of the second navigation hole.

7. The method for dismantling a double-navigation continuous beam bridge using a bridge erection machine according to claim 1, characterized in that: The bridge erecting machine (8) is composed of a pair of beams that are horizontally arranged and parallel to each other. The top and bottom of the bridge erecting machine (8) are respectively provided with an upper slide rail and a lower slide rail along the length direction.

8. The method for dismantling a double-navigation continuous beam bridge using a bridge erection machine according to claim 1, characterized in that: The top of the supporting leg of the bridge-building machine (8) cooperates with the lower sliding rail at the bottom of the bridge-building machine (8) through a separation sliding mechanism, and the supporting leg can reciprocate along the length direction of the bridge-building machine (8).

9. The method for dismantling a double-navigation continuous beam bridge using a bridge erection machine according to claim 1, characterized in that: The legs of the bridge erecting machine (8) are connected to a longitudinal travel cylinder, and the longitudinal travel cylinder is arranged parallel to the extension direction of the bridge erecting machine (8).

10. The method for dismantling a double-navigation continuous beam bridge using a bridge erection machine according to claim 1, characterized in that: The overhead crane is arranged on the top of the bridge erecting machine (8) and cooperates with the upper slide rail of the bridge erecting machine (8) through an upper translation mechanism.

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