Construction device for bridge demolition

Abstract

The utility model relates to the technical field of bridge construction, in particular to a bridge demolition construction device which comprises tower arms, a cantilever cast-in-place beam is poured between the tower arms through cement, brackets are fixedly installed on the side walls of the tower arms by forming embedded box holes, the upper portions of the brackets abut against lower cross beam supports, and the lower cross beam supports abut against the lower cross beam supports. A side frame is welded to the upper end of the lower cross beam support, an inclined supporting frame is welded to one side of the side frame, a top frame is welded to the upper end of the inclined supporting frame and the upper end of the side frame, beret pieces are welded among the top frame, the inclined supporting frame and the side frame, and a main truss connector is fixedly welded to the middle of the top frame. The mechanical cost, the labor cost and the equipment cost are saved, and the method is worthy of popularization.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge construction technical field especially relates to a construction device for bridge demolition. BACKGROUND

[0002] After the upper cross beam concrete pouring is completed and reaches the design strength, the upper cross beam support is removed. The truss upper structure can be removed piece by piece along the bridge by the tower crane, but the overall weight of the main truss structure is large, cannot be removed by the tower crane, the corbel is embedded in the tower body and serves as the load-bearing component of the main truss mechanism, and the removal difficulty is also large. The lower cross beam is located between the truss and the corbel and also cannot be removed alone. The existing main truss structure system cannot be removed alone due to the limitation of hoisting equipment and operation space. SUMMARY

[0003] The utility model discloses a construction device for bridge demolition, which solves the problem of the prior art that the bridge cannot be removed alone.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] The utility model discloses a construction device for bridge demolition, which solves the problem of the prior art that the bridge cannot be removed alone.

[0006] Preferably, the lower cross beam support is welded with a draft pad at the bottom, and the draft pad is arranged above the corbel.

[0007] Preferably, the length direction of the upper cross beam support is parallel to the length direction of the lower cross beam support and is horizontally arranged.

[0008] Preferably, the length direction of the distribution beam is horizontally arranged, and the length direction of the distribution beam is also parallel to the length direction of the upper cross beam support.

[0009] Preferably, the length direction of the continuous jack is vertically arranged.

[0010] The bridge dismantling construction device has the beneficial effects that: in the dismantling process, the continuous jack device can be used to suspend and support the main truss structure, the internal structure of the main truss can be dismantled separately, compared with the prior art which uses large hoisting machinery to dismantle, the device also saves a large amount of mechanical cost, labor cost and equipment cost, and the economic benefit is remarkable. BRIEF DESCRIPTION OF DRAWINGS

[0011] Fig. 1 The utility model provides a kind of bridge dismantling construction device's structural schematic diagram;

[0012] Fig. 2 The utility model provides a kind of bridge dismantling construction device's side view structural schematic diagram;

[0013] Fig. 3 The utility model provides a kind of bridge dismantling construction device's structural schematic diagram in main truss removal state after moving down.

[0014] In the drawing: 1, tower arm;2, distribution beam;3, continuous jack;4, steel strand;5, top frame;6, main truss joint;7, upper cross beam support;8, inclined support frame;9, belay piece;10, side frame;11, lower cross beam support;12, corbel;13, cantilever cast-in-place beam;14, pad. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0016] Embodiment 1: refer to Figs. 1-3 A kind of bridge dismantling construction device, including tower arm 1, cantilever cast-in-place beam 13 is poured by cement between tower arm 1, tower arm 1 side wall is fixedly installed with corbel 12 by setting pre-buried box hole, corbel 12 can be used to support main truss structure, the installation mode between corbel 12 and tower arm 1 is same with prior art, corbel 12 and tower arm 1 can be dismantled. Lower cross beam support 11 is abutted on corbel 12 top, side frame 10 is welded on the upper end of lower cross beam support 11, inclined support frame 8 is welded on the side of side frame 10, top frame 5, inclined support frame 8 and side frame 10 are welded with the upper end of side frame 10, belay piece 9 is welded between top frame 5, inclined support frame 8 and side frame 10, top frame 5, inclined support frame 8, side frame 10 and belay piece 9 jointly constitute main truss structure.

[0017] The middle part of the top frame 5 is fixedly welded with a main truss joint 6, and the lower surface of the cantilever cast-in-place beam 13 is connected with the main truss joint 6 through a tower cable connection component; in the process of removing the bridge, the tower cable connection component between the cantilever cast-in-place beam 13 and the main truss joint 6 needs to be removed, so that the main truss frame can be lowered; the upper surface of the top frame 5 is fixedly installed with an upper cross beam support 7, the length direction of the upper cross beam support 7 is parallel to the length direction of the lower cross beam support 11 and is horizontally arranged, the upper end of the cantilever cast-in-place beam 13 is fixedly installed with a distribution beam 2, the length direction of the distribution beam 2 is horizontally arranged and is parallel to the length direction of the upper cross beam support 7, the upper end of the distribution beam 2 is fixedly installed with a continuous jack 3, the length direction of the continuous jack 3 is vertically arranged, the continuous jack 3 is installed on the cantilever cast-in-place beam 13 through the distribution beam 2, the end of the continuous jack 3 is connected with the upper cross beam support 7 through a steel strand 4, and the steel strand 4 supports the cross beam support 7, so that the main truss frame can be suspended and supported by the continuous jack 3.

[0018] The bottom of the lower cross beam support 11 is welded with a bearing pad 14, the bearing pad 14 is arranged above the corbel 12, and the bearing pad 14 is located between the lower cross beam support 11 and the corbel 12; the bearing pad 14 can improve the bearing capacity and rigidity of the beam, reduce the possibility of crack generation, and improve the safety performance and service life of the structure.

[0019] Working principle: in the working process of the bridge removing construction device, the distribution beam 2 is first fixed on the upper surface of the cantilever cast-in-place beam 13, and then the continuous jack 3 is installed on the distribution beam 2; the continuous jack 3 supports the upper cross beam support 7 through the steel strand 4; at this time, the weight of the main truss frame including the upper cross beam support 7, the top frame 5, the inclined support frame 8, the belay sheet 9, the side frame 10 and the lower cross beam support 11 is all supported by the continuous jack 3; then the corbel 12 is removed by the external tower crane through a guide chain, the removal mode is the prior art; then the structure connected between the side frame 10, the top frame 5 and the tower arm 1 is all removed, so that the main truss frame is completely disconnected with the side wall of the tower arm 1; at this time, the main truss frame is lowered by the continuous jack 3; when the bottom of the main truss frame is about 1m away from the bridge deck, the lowering is stopped; finally, the main truss frame is removed from outside to inside by the tower crane and the guide chain; compared with the prior art, the device can remove and lower the main truss frame as a whole by using the continuous jack device, and can suspend and support the main truss frame, so that the internal structure can be removed separately.

[0020] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A construction device for bridge demolition, comprising a tower arm (1), characterized in that, The cantilever cast-in-place beam (13) is casted by cement between the tower arms (1), the side walls of the tower arms (1) are fixedly installed with corbels (12) by opening embedded box holes, the upper portions of the corbels (12) abut against lower cross beam supports (11), the upper ends of the lower cross beam supports (11) are welded with side frames (10), the side frames (10) are welded with inclined support frames (8) on one side, the inclined support frames (8) and the upper ends of the side frames (10) are welded with top frames (5), the top frames (5), the inclined support frames (8) and the side frames (10) are welded with bearers (9), the middle portions of the top frames (5) are fixedly welded with main truss joints (6), the lower surfaces of the cantilever cast-in-place beams (13) are connected with the main truss joints (6) through tower cable connecting members, the upper surfaces of the top frames (5) are fixedly installed with upper cross beam supports (7), the upper ends of the cantilever cast-in-place beams (13) are fixedly installed with distribution beams (2), the upper ends of the distribution beams (2) are fixedly installed with continuous jacks (3), the ends of the continuous jacks (3) are connected with the upper cross beam supports (7) through steel strands (4).

2. The construction apparatus for bridge demolition according to claim 1, characterized by The lower cross beam supports (11) are welded with water scoops (14) at the bottom, and the water scoops (14) are arranged above the corbels (12).

3. The construction apparatus for bridge demolition according to claim 1, characterized by The length directions of the upper cross beam supports (7) and the lower cross beam supports (11) are parallel and horizontally arranged.

4. The construction apparatus for bridge demolition according to claim 1, characterized by The length direction of the distribution beams (2) is horizontally arranged, and the length direction is also parallel to the length direction of the upper cross beam supports (7).

5. The construction apparatus for bridge demolition according to claim 1, wherein The length direction of the continuous jacks (3) is vertically arranged.

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