CN111441265A - Method for dismantling concrete bridge on water - Google Patents
Method for dismantling concrete bridge on water Download PDFInfo
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- CN111441265A CN111441265A CN202010265500.3A CN202010265500A CN111441265A CN 111441265 A CN111441265 A CN 111441265A CN 202010265500 A CN202010265500 A CN 202010265500A CN 111441265 A CN111441265 A CN 111441265A
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- floating carrier
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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Abstract
The invention discloses a method for dismantling a concrete bridge on water, which is carried out by adopting a floating crane, wherein the floating crane comprises a floating carrier and a hoisting device, the hoisting device is arranged on the floating carrier, anchor rope winding and unwinding devices are respectively arranged at four corners of the floating carrier, each anchor rope winding and unwinding device is provided with an anchor rope, and the method for dismantling the concrete bridge on water comprises the following steps: s1: anchoring and positioning the floating carrier: stopping the floating carrier at the side direction of the concrete section to be dismantled, and anchoring each anchor rope to finish the positioning of the floating carrier; s2: dismantling the concrete section to be dismantled; s3: moving the floating carrier back: loosening the anchor rope in front of the floating carrier, and synchronously tightening the anchor rope behind the floating carrier to move the floating carrier to a preset position relative to the bridge; s5: transporting floating carriers to land; s6: returning the floating carrier; s7: and circulating the steps from S1 to S6 until the bridge is dismantled. The method for dismantling the concrete bridge on water has the advantages of improving the operation efficiency and the operation safety, reducing the operation cost and the like.
Description
Technical Field
The invention relates to a bridge dismantling method, in particular to a dismantling method of an overwater concrete bridge.
Background
With the rapid development of infrastructure construction in China, bridges constructed in early stage cannot meet the requirements of traffic development due to low design load level, small traffic capacity, aging structure and the like, and must be dismantled and rebuilt. In the bridge dismantling process, a large number of lifting and transportation of dismantling structures are involved, particularly, the water bridge crossing rivers and rivers is a large or super-large bridge, the structure after the bridge is segmented and partitioned is mainly of a vertical long structure, the weight is large, the water lifting and transportation are involved, the safety risk is high, multiple devices are generally required to be put into the water lifting and transportation by means of cooperation of division of labor, after the lifting of the structure is completed by adopting a large floating crane, the structure is transported to a destination by means of a ship on a large transport ship, and then the unloading of the dismantling structure to a stock crushing plant is completed by utilizing a large crane on land. Because the input of many equipment is used under this kind of mode, it is big to the unified coordination management degree of difficulty of equipment, equipment safety risk height, cost input height, simultaneously, because demolish the structure and shift between different equipment at hoist and mount and transportation, transportation and unloading in-process, the consumption time is long, and is inefficient, seriously influences the whole progress that the bridge demolishd.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a method for dismantling an overwater concrete bridge, which can improve the operation efficiency and the operation safety and reduce the operation cost.
In order to solve the technical problems, the invention adopts the following technical scheme:
a method for dismantling a concrete bridge on water is carried out by adopting a floating crane, the floating crane comprises a floating carrier and a hoisting device, the hoisting device is arranged on the floating carrier, anchor rope winding and unwinding devices are respectively arranged at four corners of the floating carrier, an anchor rope is arranged on each anchor rope winding and unwinding device, and the method for dismantling the concrete bridge on water comprises the following steps:
s1: anchoring and positioning the floating carrier: stopping the floating carrier at the side direction of the concrete section to be dismantled, and anchoring each anchor rope to finish the positioning of the floating carrier;
s2: dismantling the concrete section to be dismantled: the hoisting device hoists the concrete section to be dismantled, and the concrete section to be dismantled is cut and dismantled;
s3: moving the floating carrier back: loosening the anchor rope in front of the floating carrier, and synchronously tightening the anchor rope behind the floating carrier to move the floating carrier to a preset position relative to the bridge;
s4: turning the floating carrier: retracting the anchor rope in front of the floating carrier, re-anchoring the floating carrier in the direction of the transportation target, then tightening the anchor rope at the position of the transportation target of the floating carrier, and controlling the tightening amount of each anchor rope by using the traction action of the anchor rope to finish the 90-degree steering of the floating carrier;
s5: floating carrier transportation and landing: transporting anchor ropes at the position of the target direction by using a floating carrier, enabling the floating carrier to move forward towards the target direction, and unloading the disassembled concrete section to a stock yard through a hoisting device after the floating carrier approaches the shore;
s6: returning the floating carrier: moving the floating carrier to the side direction of the next concrete section to be dismantled and realizing positioning by utilizing the matching action of each anchor rope;
s7: and circulating the steps from S1 to S6 until the bridge is dismantled.
As a further improvement of the above technical solution:
in step S1, when the positioning of the floating carrier is completed, each anchor line is inclined outward of the floating carrier.
Each anchor rope forms X-shaped opposite pulling for the floating carrier.
In the step S3, the predetermined position is a position where the floating carrier is aligned with the shore stock yard.
In the step S4, the transportation target direction is a direction toward the stock yard, and after the floating carrier is turned, the anchor lines behind the floating carrier are re-anchored, so that each anchor line forms an X-shaped counter pull to the floating carrier.
In step S5, the floating carrier advances forward in cooperation with the tightening action of the front anchor line and the releasing action of the rear anchor line.
The floating carrier is self-powered.
The anchor rope winding and unwinding device is a winch.
Compared with the prior art, the invention has the advantages that:
the method for dismantling the concrete bridge on water adopts a floating crane, the floating crane comprises a floating carrier and a hoisting device, the hoisting device is arranged on the floating carrier, anchor rope winding and unwinding devices are respectively arranged at four corners of the floating carrier, anchor ropes are respectively arranged on the anchor rope winding and unwinding devices, and the method for dismantling the concrete bridge on water comprises the following steps: s1: anchoring and positioning the floating carrier: stopping the floating carrier at the side direction of the concrete section to be dismantled, and anchoring each anchor rope to finish the positioning of the floating carrier; s2: dismantling the concrete section to be dismantled: the hoisting device hoists the concrete section to be dismantled, and the concrete section to be dismantled is cut and dismantled; s3: moving the floating carrier back: loosening the anchor rope in front of the floating carrier, and synchronously tightening the anchor rope behind the floating carrier to move the floating carrier to a preset position relative to the bridge; s4: turning the floating carrier: retracting the anchor rope in front of the floating carrier, re-anchoring the floating carrier in the direction of the transportation target, then tightening the anchor rope at the position of the transportation target direction of the floating carrier, and completing 90-degree steering of the floating carrier by utilizing the traction action of the anchor rope and controlling the tightening amount of each anchor rope; s5: floating carrier transportation and landing: transporting anchor ropes at the position of the target direction by using a floating carrier, enabling the floating carrier to move forward towards the target direction, and unloading the disassembled concrete section to a stock yard through a hoisting device after the floating carrier approaches the shore; s6: returning the floating carrier: moving the floating carrier to the side direction of the next concrete section to be dismantled and realizing positioning by utilizing the matching action of each anchor rope; s7: and circulating the steps from S1 to S6 until the bridge is dismantled. The invention adopts the floating crane with the functions of hoisting and transporting, integrates two different operation contents of hoisting and transporting, greatly improves the operation efficiency, shortens the time consumed by hoisting and transporting the bridge concrete section, and reduces the operation cost. And the floating crane is positioned, steered and moves forward through the cooperation of the four anchor ropes, so that the floating carrier of the floating crane can be more stable on water, the risk of overturning of the floating carrier due to too large water surface waves is avoided, and the safety is improved.
Drawings
Fig. 1 is a diagram of an embodiment of the present invention.
Fig. 2 is a schematic illustration of the anchoring location of the floating crane of the present invention.
Fig. 3 is a schematic drawing of the retraction of the floating crane of the present invention.
Fig. 4 is a schematic turning view of the floating crane of the present invention.
Fig. 5 is a schematic view of the forward travel of the floating crane of the present invention.
Fig. 6 is a schematic return stroke diagram of the floating crane of the present invention.
The reference numerals in the figures denote:
1. floating; 11. a floating carrier; 12. a hoisting device; 13. an anchor line retracting device; 14. an anchor line; 2. a concrete section; 3. a stock ground.
Detailed Description
The invention will be described in further detail below with reference to the drawings and specific examples.
Fig. 1 to 6 show an embodiment of the method for demolishing an overwater concrete bridge, the method for demolishing the overwater concrete bridge is performed by using a floating crane 1, the floating crane 1 comprises a floating carrier 11 and a hoisting device 12, the hoisting device 12 is arranged on the floating carrier 11, anchor rope retracting devices 13 are respectively arranged at four corners of the floating carrier 11, each anchor rope retracting device 13 is provided with an anchor rope 14, and the method for demolishing the overwater concrete bridge comprises the following steps:
s1: as shown in fig. 1 and 2, the floating carrier 11 is anchored: the floating carrier 11 is stopped at the side position of the concrete section 2 to be dismantled, and each anchor rope 14 is anchored, so that the positioning of the floating carrier 11 is completed;
s2: dismantling the concrete section 2 to be dismantled: the hoisting device 12 hoists the concrete section 2 to be dismantled, and the concrete section 2 to be dismantled is cut and dismantled;
s3: as shown in fig. 3, the floating carrier 11 moves backward: releasing the anchor ropes 14 in front of the floating carrier 11, synchronously tightening the anchor ropes 14 behind the floating carrier 11, and moving the floating carrier 11 to a predetermined position relative to the bridge (the moving direction of the floating carrier 11 is indicated as A in figures 2 to 6, and B is indicated as the central line of the bridge in figures 2 to 6);
s4: as shown in fig. 4, the floating carrier 11 turns: retracting the anchor lines 14 in front of the floating carrier 11, re-anchoring the floating carrier 11 in the transportation target direction, then tightening the anchor lines 14 at the transportation target direction position of the floating carrier 11, and controlling the tightening amount of each anchor line 14 by using the traction action of the anchor lines 14 to finish the 90-degree steering of the floating carrier 11;
s5: as shown in fig. 5, the floating carrier 11 is transported ashore: transporting anchor ropes 14 at the target direction position by using the floating carrier 11, enabling the floating carrier 11 to move forwards in the target direction (the forward direction of the floating carrier 11 is indicated as C in figure 5), and unloading the disassembled concrete section 2 to the stock ground 3 through a hoisting device 12 after the floating carrier 11 comes to the shore;
s6: as shown in fig. 6, the return stroke of the floating carrier 11 (D in fig. 6 indicates the return stroke direction of the floating carrier 11): the floating carrier 11 is moved to the side direction of the next concrete segment 2 to be dismantled and positioning is realized by utilizing the matching action of each anchor rope 14;
s7: and circulating the steps from S1 to S6 until the bridge is dismantled.
The invention adopts the floating crane 1 with hoisting and transporting functions to integrate two different operation contents of hoisting and transporting, thereby greatly improving the operation efficiency, shortening the time consumed by hoisting and transporting the bridge concrete section 2 and reducing the operation cost. In addition, the floating crane 1 is positioned, steered and advanced through the cooperation of the four anchor ropes 14 (the tail ends of the anchor ropes 14 are provided with anchors, the front ends of the anchor ropes 14 are arranged on the anchor rope winding and unwinding devices 13, and the anchor rope winding and unwinding devices 13 are used for winding and unwinding), so that the floating carrier 11 of the floating crane 1 can be more stable on water, the risk that the floating carrier 11 falls down due to too large water surface waves is avoided, and the safety is improved.
In this embodiment, in step S1, when the floating carrier 11 is positioned, the anchor lines 14 are respectively inclined to the outside of the floating carrier 11, that is, the anchor lines 14 form an acute angle with the longitudinal direction of the floating carrier 11, so that the stability of the floating carrier 11 is improved, and the influence on the cutting process of the concrete segment 2 due to the floating of the floating carrier 11 is avoided.
In this embodiment, each anchor line 14 forms an X-shaped diagonal to the floating carrier 11, i.e. the two anchor lines 14 at diagonal positions are collinear, so that the floating carrier 11 is located at the intersection of the four anchor lines 14, further improving the stability of the floating carrier 11 when positioning.
In this embodiment, in step S3, the predetermined position is a position where the floating carrier 11 is aligned with the shoreside 3, so that the floating carrier 11 is aligned with the shoreside 3 after turning at 90 °, and the floating crane 1 can travel straight toward the stockyard 3, thereby shortening the transportation distance in the later period, facilitating the selection of the anchoring position of the anchor rope 14 in front of the floating crane 1, facilitating the anchoring operation of the anchor rope 14 in the later period, and quickly completing the accurate shoring of the floating crane 1.
In this embodiment, in step S4, the transportation target direction is the direction toward the stock ground 3, and after the floating carrier 11 is turned, the anchor lines 14 behind the floating carrier 11 are re-anchored, so that the anchor lines 14 form an X-shaped counter pull for the floating carrier 11, and at this time, as long as the anchor lines 14 in front of the floating carrier 11 can be synchronously tightened and the anchor lines 14 behind the floating carrier 11 can be synchronously loosened, the floating carrier 11 can move forward stably.
In this embodiment, in step S5, the floating carrier 11 advances forward by the tightening action of the front anchor lines 14 and the loosening action of the rear anchor lines 14. In the process that the floating carrier 11 moves forward towards the stock ground 3, as long as the tightening amount of the anchor rope 14 in front of the floating carrier 11 is matched with the loosening amount of the anchor rope 14 behind the floating carrier, the floating carrier 11 can move forward stably, and the shaking of the concrete section 2 on the hoisting device 12 is reduced.
In this embodiment, the floating carrier 11 is self-powered, and the ability to adjust the position of the floating carrier 11 is improved. The floating crane 1 can mainly travel on water by using self power, is assisted by traction of each anchor rope 14, and achieves the purpose of high-efficiency operation through mutual matching of the two powers.
In this embodiment, the anchor line retracting device 13 is a winch.
In this embodiment, the anchoring position of each anchor line 14 at each stage is determined according to the specific position of the floating crane 1 and the moving direction of the floating crane 1 at the next stage. The floating crane 1 needs to go backwards, turn, move forwards and the like in the whole hoisting and transportation process, and the anchoring position is favorable for the floating crane 1 to quickly realize the corresponding purpose by means of the traction force of the anchor rope 14.
In the embodiment, the floating crane 1 moves back and forth to a cycle along the water walking route from the loading shore to the side position of the stock yard 3 to the next concrete section 2 to be dismantled, and the dismantling of the water bridge is completed through the continuous cycle operation of the floating crane 1.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (8)
1. A method for dismantling an overwater concrete bridge is carried out by adopting a floating crane (1), and is characterized in that: the floating crane (1) comprises a floating carrier (11) and a hoisting device (12), the hoisting device (12) is arranged on the floating carrier (11), anchor rope winding and unwinding devices (13) are respectively arranged at four corners of the floating carrier (11), an anchor rope (14) is arranged on each anchor rope winding and unwinding device (13), and the method for dismantling the concrete bridge on water comprises the following steps:
s1: anchoring and positioning the floating carrier (11): the floating carrier (11) is parked at the side position of the concrete section (2) to be dismantled, and each anchor rope (14) is anchored to finish the positioning of the floating carrier (11);
s2: dismantling the concrete section (2) to be dismantled: the hoisting device (12) hoists the concrete section (2) to be dismantled, and the concrete section (2) to be dismantled is cut and dismantled;
s3: moving back the floating carrier (11): releasing the anchor rope (14) in front of the floating carrier (11), synchronously tightening the anchor rope (14) behind the floating carrier (11), and moving the floating carrier (11) to a preset position relative to the bridge;
s4: the floating carrier (11) turns: retracting the anchor ropes (14) in front of the floating carrier (11), re-anchoring the floating carrier (11) in the transportation target direction, then tightening the anchor ropes (14) on the transportation target direction of the floating carrier (11), and controlling the tightening amount of each anchor rope (14) by using the traction action of the anchor ropes (14) to complete the 90-degree steering of the floating carrier (11);
s5: the floating carrier (11) is transported to the shore: the anchor rope (14) on the position of the target direction is transported by the floating carrier (11), so that the floating carrier (11) moves forward towards the target direction, and the disassembled concrete section (2) is unloaded to the stock ground (3) through the hoisting device (12) after approaching the shore;
s6: return stroke of the floating carrier (11): the floating carrier (11) is moved to the side position of the next concrete section (2) to be dismantled and positioning is realized by utilizing the matching action of each anchor rope (14);
s7: and circulating the steps from S1 to S6 until the bridge is dismantled.
2. The method for demolishing a concrete bridge on water according to claim 1, wherein: in step S1, when the positioning of the floating carrier (11) is completed, each anchor line (14) is inclined outward of the floating carrier (11).
3. The method for demolishing a concrete bridge on water according to claim 2, wherein: the anchor lines (14) form an X-shaped counter-pull to the floating carrier (11).
4. The method for demolishing a concrete bridge on water according to claim 1, wherein: in step S3, the predetermined position is a position where the floating carrier (11) is aligned with the shore stockyard (3).
5. The method for demolishing a concrete bridge on water according to claim 1, wherein: in the step S4, the transportation target direction is a direction toward the stock yard (3), and after the steering of the floating carrier (11) is completed, the anchor lines (14) behind the floating carrier (11) are re-anchored, so that the anchor lines (14) form an X-shaped counter pull on the floating carrier (11).
6. The method for demolishing a concrete bridge on water according to claim 5, wherein: in the step S5, the floating carrier (11) moves forward under the cooperation of the tightening action of the front anchor rope (14) and the releasing action of the rear anchor rope (14).
7. The method for demolishing a concrete bridge on water according to any one of claims 1 to 6, wherein: the floating carrier (11) is self-powered.
8. The method for demolishing a concrete bridge on water according to any one of claims 1 to 6, wherein: the anchor rope winding and unwinding device (13) is a winch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010265500.3A CN111441265A (en) | 2020-04-07 | 2020-04-07 | Method for dismantling concrete bridge on water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010265500.3A CN111441265A (en) | 2020-04-07 | 2020-04-07 | Method for dismantling concrete bridge on water |
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| CN111441265A true CN111441265A (en) | 2020-07-24 |
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| CN202010265500.3A Pending CN111441265A (en) | 2020-04-07 | 2020-04-07 | Method for dismantling concrete bridge on water |
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Application publication date: 20200724 |
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