CN113481891B - Method for dismantling masonry structure continuous arch bridge - Google Patents
Method for dismantling masonry structure continuous arch bridge Download PDFInfo
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- CN113481891B CN113481891B CN202110856940.0A CN202110856940A CN113481891B CN 113481891 B CN113481891 B CN 113481891B CN 202110856940 A CN202110856940 A CN 202110856940A CN 113481891 B CN113481891 B CN 113481891B
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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 masonry structural continuous arch bridge, which comprises a plurality of spans and comprises the following steps: s1, manufacturing a load lifting device, wherein the load lifting device comprises a load container with an accommodating space inside, a power element for pumping water and a pipeline for connecting the load container and the power element; s2, placing at least one empty load container at the midspan position of each span on the masonry structure continuous arch bridge to be removed; the power element is arranged outside the bridge; s3, carrying out traffic blocking on the masonry structure continuous arch bridge needing to be removed; s4, conveying river water into the load container by using the power element; and S5, beginning to dismantle the side span of the masonry structural arch bridge until causing self-collapse of other spans of the masonry structural arch bridge. The load container is arranged on the masonry structure continuous arch bridge, so that the masonry structure continuous arch bridge can be caused to automatically collapse, and the dismantling efficiency is high.
Description
Technical Field
The invention relates to the technical field of masonry arch bridge dismantling, in particular to a dismantling method of a masonry structure continuous arch bridge.
Background
The masonry structure continuous arch bridge is an arch bridge with a plurality of spans, which takes masonry materials such as bricks, stones, concrete and the like as main building materials; the novel high-strength concrete has the advantages of good durability, small maintenance workload, strong shock resistance and small vibration. But also has the disadvantages of heavy weight, low strength, large section size, heavy masonry work, high labor and time consumption. When the masonry structure continuous arch bridge needs to be dismantled due to diseases, the bridge is generally dismantled step by step through personnel and mechanical equipment, the dismantling method is low in efficiency, river navigation needs to be forbidden during the dismantling engineering, and economic loss can be caused by long-time prohibition of navigation; in addition, as the masonry structure continuous arch bridge has disease reasons, the stability and the load capacity of the bridge are in problem, when one span is dismantled, other spans can be collapsed, and casualties can be caused; wherein, because the masonry structure does not contain reinforcing steel bars, the masonry structure has high collapse speed, and personnel are difficult to react, thereby causing serious casualties.
Disclosure of Invention
In view of the above, the present invention provides a method for dismantling a masonry structure continuous arch bridge, which can solve the problem of low dismantling efficiency of the existing masonry structure continuous arch bridge to at least a certain extent.
The technical scheme of the invention is realized as follows:
a method of dismantling a masonry structural continuous arch bridge comprising a plurality of spans, comprising the steps of:
s1, manufacturing a load lifting device, wherein the load lifting device comprises a load container with an accommodating space inside, a power element for pumping water and a pipeline for connecting the load container and the power element;
s2, placing at least one empty load container at the midspan position of each span on the masonry structure continuous arch bridge to be removed; the power element is arranged outside the bridge;
s3, carrying out traffic blockade on the masonry structure continuous arch bridge to be dismantled, evacuating personnel, and stopping river navigation;
s4, conveying river water into the load container by using the power element;
and S5, beginning to dismantle the side span of the masonry structural arch bridge until causing self-collapse of other spans of the masonry structural arch bridge.
As a further alternative to the method of dismantling the masonry structure continuous arch bridge, the load container is a water bag or tank.
As a further alternative to the method of removing the masonry structure continuous arch bridge, the power element is a submersible pump.
As a further alternative to the method of dismantling the masonry structural continuous arch bridge, a load cell is placed empty at the mid-span location of each span, one load cell for each power element; set up the flotation tank on the surface of water in river course, set up power component on the flotation tank, power component passes through the electricity box of inserting of waterproof power supply line connection bank.
As a further alternative to the method for dismantling the masonry structural continuous arch bridge, if the other spans do not collapse by themselves after dismantling the side span of the masonry structural continuous arch bridge, the filling of the load container or the dismantling of the sub-span of the masonry structural continuous arch bridge is continued after that, causing the other spans of the masonry structural continuous arch bridge to collapse by themselves in step S5.
As a further alternative to the method for dismantling the masonry structure continuous arch bridge, masonry blocks falling into a river channel are salvaged after the masonry structure continuous arch bridge collapses by itself.
As a further alternative to the method of dismantling the masonry structure continuous arch bridge, a barge-carrying excavator is used to salvage masonry blocks dropped into a river channel.
As a further alternative to the method of dismantling the masonry structural continuous arch bridge, in step S5, the side span of the masonry structural continuous arch bridge is commenced using a long arm excavator equipped with hydraulic impact hammers.
As a further alternative to the method for dismantling the masonry structure continuous arch bridge, two long-arm excavators equipped with hydraulic impact hammers are arranged on the shore, and the two long-arm excavators are distributed on both sides of the masonry structure continuous arch bridge and perform impact dismantling on the vault part of the side span.
The invention has the following beneficial effects: by arranging the load container capable of lifting the load on the masonry structure continuous arch bridge, after the side span of the masonry structure continuous arch bridge is dismantled, the self-collapse of other spans of the masonry structure continuous arch bridge can be caused, and the dismantling efficiency is high; and only placing the empty load containers on the bridge floor at the beginning to avoid causing the collapse of the damaged masonry structure continuous arch bridge before the side span is dismantled; by lifting the load to the load container, the masonry structure continuous arch bridge is ensured to automatically collapse after the side span is dismantled.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention.
Figure 1 is a schematic view of a masonry structural continuous arch bridge spanning a waterway;
figure 2 is a schematic view of a load container placed on a masonry continuous arch bridge.
In the figure: 1. a load container.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. Based on the embodiments of the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may mean that the first feature is directly above or obliquely above the second feature, or that only the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Referring to figures 1 and 2, the present invention discloses a method of dismantling a masonry structural continuous arch bridge comprising a plurality of spans, comprising the steps of:
s1, manufacturing a load lifting device, wherein the load lifting device comprises a load container 1 with an accommodating space inside, a power element for pumping water and a pipeline for connecting the load container 1 and the power element;
s2, placing at least one empty load container 1 at a mid-span position of each span on the masonry structure continuous arch bridge to be demolished; the power element is arranged outside the bridge;
s3, carrying out traffic blocking on the masonry structure continuous arch bridge to be dismantled, evacuating personnel, and stopping river navigation;
s4, delivering river water into the load container 1 by using the power element;
and S5, beginning to dismantle the side span of the masonry structural arch bridge until causing self-collapse of other spans of the masonry structural arch bridge.
Specifically, the load container 1 capable of lifting the load is arranged on the masonry structure continuous arch bridge, so that after the side span of the masonry structure continuous arch bridge is dismantled, the self-collapse of other spans of the masonry structure continuous arch bridge can be caused, and the dismantling efficiency is high; and only the empty load container 1 is placed on the bridge floor at the beginning, so as to avoid the collapse of the damaged masonry structure continuous arch bridge before the side span is removed; by lifting the load on the load container 1, the masonry structure continuous arch bridge is ensured to automatically collapse after the side span is dismantled.
In the above embodiment, the power element may be a submersible pump; wherein, an empty load container 1 is arranged at the midspan position of each span, and one load container 1 corresponds to one power element; set up the flotation tank on the surface of water in river course, set up power component on the flotation tank, power component passes through the electricity box of inserting of waterproof power supply line connection bank. Therefore, one power element controls the water carrying capacity of one load container 1, the load size caused by the span of the load container 1 is controlled, and the span at different positions can be independently adjusted, so that the water carrying capacity control device is more convenient.
In the above scheme, as the masonry structure continuous arch bridge is damaged, the load capacity of each span on the masonry structure continuous arch bridge may be changed and is different; in order to avoid the collapse of the masonry structure continuous arch bridge caused by placing the load container 1, the load container 1 needs to be kept empty before and just after placing, namely, does not contain water and is light; wherein the load container 1 can be a water bag or a water tank, and the water tank is made of plastics. For some masonry structural continuous arch bridges, which are still stable despite of their disease, water bags or tanks can be placed by workers at mid-span locations on the deck; for some masonry continuous arch bridges that are severely damaged and may collapse at any time, a crane vessel may be used to place the load container 1 in a midspan position on the deck.
In the above embodiment, in step S5, if the span of the masonry structural arch bridge is removed, the other spans do not collapse by themselves, and then the load container 1 is filled with water or the secondary span of the masonry structural arch bridge is removed, which causes the other spans of the masonry structural arch bridge to collapse by themselves. Preferably, water is continuously injected into the load container 1, so that the load of the load container 1 on the bridge is increased; when the bridge is filled with water and the bridge is not collapsed, dismantling the secondary side span of the masonry structure continuous arch bridge; and (4) the masonry structure is gradually removed from the edge of the bridge to the inside until the arch bridge of the masonry structure is collapsed continuously.
Specifically, in step S5, the side span of the masonry continuous arch bridge is removed by a long arm excavator equipped with a hydraulic impact hammer. Specifically, two long-arm excavators with hydraulic impact hammers are arranged on the shore, and the two long-arm excavators are distributed on two sides of the masonry structure continuous arch bridge and used for impacting and dismantling the arch crown part of the side span.
According to the scheme, after the masonry structure continuous arch bridge collapses automatically, the brick and stone building blocks falling into the river channel can be salvaged by utilizing a barge carrying excavator. And after fishing is finished, restoring river navigation.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A method of dismantling a masonry structural continuous arch bridge comprising a plurality of spans, comprising the steps of:
s1, manufacturing a load lifting device, wherein the load lifting device comprises a load container with an accommodating space inside, a power element for pumping water and a pipeline for connecting the load container and the power element;
s2, placing at least one empty load container at the midspan position of each span on the masonry structure continuous arch bridge to be removed; the power element is arranged outside the bridge;
s3, carrying out traffic blocking on the masonry structure continuous arch bridge to be dismantled, evacuating personnel, and stopping river navigation;
s4, conveying river water into the load container by using the power element;
and S5, beginning to dismantle the side span of the masonry structural arch bridge until causing self-collapse of other spans of the masonry structural arch bridge.
2. A masonry continuous arch bridge demolition method as claimed in claim 1, wherein the load container is a water bag or a water tank.
3. A method of demolishing a masonry continuous arch bridge as claimed in claim 1, wherein the power element is a submersible pump.
4. A masonry continuous arch bridge removal method as claimed in claim 3, wherein a load cell is placed empty at the mid-span location of each span, one load cell for each power element; set up the flotation tank on the surface of water in river course, set up power component on the flotation tank, power component passes through the electricity box of inserting of waterproof power supply line connection bank.
5. A method as claimed in claim 1, wherein, in step S5, if the other side span of the masonry structural arch bridge is not self-collapsed after the removal of the side span, the method continues to inject water into the load container or remove the sub-side span of the masonry structural arch bridge, thereby causing the other side span of the masonry structural arch bridge to self-collapse.
6. A method of demolishing a masonry continuous arch bridge according to claim 5, wherein the masonry blocks dropped into the waterway are salvaged after the masonry continuous arch bridge collapses by itself.
7. A method of demolishing a masonry continuous arch bridge as claimed in claim 6, wherein the masonry blocks dropped into the waterway are salvaged by a barge-carrying excavator.
8. A method of demolishing a masonry continuous arch bridge as claimed in claim 1, wherein in step S5, the side span of the masonry continuous arch bridge is started to be demolished by a long arm excavator equipped with hydraulic impact hammers.
9. A method of demolishing a masonry structure continuous arch bridge as claimed in claim 8, wherein two long arm excavators with hydraulic impact hammers are arranged on the shoreside, distributed on both sides of the masonry structure continuous arch bridge and impact demolition is performed on the arch part of the side span.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110856940.0A CN113481891B (en) | 2021-07-28 | 2021-07-28 | Method for dismantling masonry structure continuous arch bridge |
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| CN202110856940.0A CN113481891B (en) | 2021-07-28 | 2021-07-28 | Method for dismantling masonry structure continuous arch bridge |
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| CN113481891A CN113481891A (en) | 2021-10-08 |
| CN113481891B true CN113481891B (en) | 2022-09-27 |
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| CN114941293B (en) * | 2022-06-08 | 2024-05-28 | 广西北投交通养护科技集团有限公司 | Method for removing double arch bridge based on shallow foundation slip damage |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005083186A (en) * | 2003-09-09 | 2005-03-31 | Kokudo:Kk | Demolition and removal method for arch bridge |
| CN102747695A (en) * | 2012-06-29 | 2012-10-24 | 浙江工业大学 | Quick dismantling method for multi-span continuous double arch bridge causing connected arch effect |
| CN111364378A (en) * | 2020-03-12 | 2020-07-03 | 中铁大桥局武汉桥梁特种技术有限公司 | Method for dismantling double-arch bridge |
| CN111778884A (en) * | 2020-07-16 | 2020-10-16 | 保利长大工程有限公司 | Construction method for dismantling over-water suspended arch bridge |
| CN112726434A (en) * | 2020-12-28 | 2021-04-30 | 中铁广州工程局集团桥梁工程有限公司 | Method for dismantling three-span through-type reinforced concrete arch bridge |
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2021
- 2021-07-28 CN CN202110856940.0A patent/CN113481891B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005083186A (en) * | 2003-09-09 | 2005-03-31 | Kokudo:Kk | Demolition and removal method for arch bridge |
| CN102747695A (en) * | 2012-06-29 | 2012-10-24 | 浙江工业大学 | Quick dismantling method for multi-span continuous double arch bridge causing connected arch effect |
| CN111364378A (en) * | 2020-03-12 | 2020-07-03 | 中铁大桥局武汉桥梁特种技术有限公司 | Method for dismantling double-arch bridge |
| CN111778884A (en) * | 2020-07-16 | 2020-10-16 | 保利长大工程有限公司 | Construction method for dismantling over-water suspended arch bridge |
| CN112726434A (en) * | 2020-12-28 | 2021-04-30 | 中铁广州工程局集团桥梁工程有限公司 | Method for dismantling three-span through-type reinforced concrete arch bridge |
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