CN102493367B - Non-blasting construction method for dismantling pier to land bridge - Google Patents
Non-blasting construction method for dismantling pier to land bridge Download PDFInfo
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- CN102493367B CN102493367B CN201110401390XA CN201110401390A CN102493367B CN 102493367 B CN102493367 B CN 102493367B CN 201110401390X A CN201110401390X A CN 201110401390XA CN 201110401390 A CN201110401390 A CN 201110401390A CN 102493367 B CN102493367 B CN 102493367B
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Abstract
The invention discloses a non-blasting construction method for dismantling a pier to land the bridge. The method comprises the following steps of: forming a notch from the top middle of the pier; filling the notch with sandbag temporary supports; dismantling the pier top structures on the two sides of the sandbag temporary supports so that a girder falls on the sandbag temporary supports; placing sandbag temporary supports on the top surfaces on the two sides of the upper end of the pier respectively; and releasing sand in the middle sandbag temporary supports so that the girder falls on the sandbag temporary supports on the two sides until the end part of the bridge falls on the ground. The construction method has good safety, effectively controls the falling speed and amplitude of the bridge, ensures the construction safety, and is economical. The equipment is relatively simple, the construction cost is relatively low, and the operability is high. The dismantled machinery does not need to be placed on the bridge floor, and a bracket below the bridge floor is not required either; and moreover, the working surface is large, the construction is flexible, the operability is high, the construction process is compact, the construction period is short, and the practicability is strong.
Description
Technical field
The invention belongs to bridge Demolishing Technology field, particularly relate to the job practices that a kind of non-demolition blasting bridge pier lands bridge.
Background technology
Cable stayed bridge claims again Cable stayed bridge, is girder directly is pulled in to a kind of bridge on bridge tower with many prestressing force rigid diagonal draw bars, is by the rigid diagonal draw bar of the bridge tower of pressure-bearing, tension and holds a kind of structural system that curved beam body combines.Cable stayed bridge mainly comprises two bridge piers, Ta Dun, bridge tower, girder and Duo Gen diagonal member; Wherein two bridge piers and tower pier are vertically set on respectively two ends and the middle part of cable stayed bridge; Girder is across on the end face at two bridge piers and tower pier, and it consists of end to end each other a plurality of girder sections; Bridge tower is vertically mounted on the girder that is positioned at the tower socle; Many diagonal members divide the both sides that are located at bridge tower, and the upper end of every diagonal member is anchored on bridge tower, and lower end is anchored on girder, and it is to consist of high-strength prestressed steel bundle external wrapping concrete layer.Just needs are removed it when cable stayed bridge can't meet instructions for use.But in the local time that bridge to be torn open is in that city or larger local of the population density and some should not adopt that the explosion means remove, non-blasting procedure is removed bridge and can at first be considered.At present, non-demolition blasting bridge has following job practices: 1. static cutting method comprises: the rope sawing is cut, the cutting of dish formula; 2. breaking method comprises: giant is broken, hydraulic breaking hammer is broken, hydraulic breakup pick is broken; 3. raising method comprises: electronic and Pneumahydraulic jack jacking, continuous jack jacking, large-tonnage jack jacking; 4. hanging method, comprising: the lifting of cable element, bridge floor suspension bracket, large-tonnage mobile crane and crawler crane.
In static cutting disassembling bridge method, no matter be that bridge or butterfly cutting bridge are cut in the rope sawing, all cutting equipment to be placed on the bridge floor of wish cutting, like this can be unfavorable to construction safety, the work plane while cutting bridge main body in addition is little, and efficiency is lower; During with the direct broken bridge of breaking method or bridge pier, the work danger coefficient is high, and the work amount is large, and financial cost is high, and is high to staff's operation construction requirement; While with raising method, removing bridge, need to set up support, workload is large, and financial cost is high; And condition of work is had to requirement while with hanging method, removing bridge, need to consider the occupy-place place of hanging device.
Summary of the invention
In order to address the above problem, the job practices that the object of the present invention is to provide a kind of easy construction, cost is low, safety is good non-demolition blasting bridge pier that bridge is landed.
In order to achieve the above object, non-demolition blasting bridge pier provided by the invention makes the job practices that bridge lands comprise the following step that carries out in order:
1) at first by the staff, with crushing mechanism, from the side top centre position of bridge pier, be formed through a breach;
2) in breach, pile the sandbag temporary support, and make the upper end of sandbag temporary support adjacent on the bottom surface of girder;
3) remove the bridge pier top structure that is positioned at sandbag temporary support both sides, and remove the height of height greater than the sandbag temporary support, both sides will keep the discrepancy in elevation not too big while removing, so that girder drops down onto on the sandbag temporary support;
4) on the end face of both sides, bridge pier upper end, place respectively the sandbag temporary support, and make the overhead height of the overhead height of the new sandbag temporary support of placing lower than the sandbag temporary support of placement middle part, front;
5) discharge the grains of sand of the sandbag temporary support in the middle of being arranged in, girder is dropped down onto on the sandbag temporary support of both sides;
6) repeating step 2)-5), until land the end of girder, can complete the Demolition Construction process thus.
Described sandbag temporary support consists of the canvas exoperidium of making and the grains of sand that are filled in exoperidium inside.
Non-demolition blasting bridge pier provided by the invention compared with prior art has the following advantages the job practices that bridge lands: 1, safety is good.Effectively control the speed of bridge decline and the amplitude of decline, guaranteed the safety of construction.2, economy.Comparison in equipment used is simple and easy, and construction cost is lower.3, operability is good.Remove machinery and need not be placed on bridge floor, under bridge floor, also need not set up support, work plane is large, and flexibly, operability is high in construction.4, practicality.The working procedure compactness, the construction period is short, and is practical.
The accompanying drawing explanation
Fig. 1 is the work progress schematic diagram when adopting non-demolition blasting bridge pier provided by the invention to make job practices that bridge lands.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, to non-demolition blasting bridge pier provided by the invention, the job practices that bridge lands is elaborated.
As shown in Figure 1, non-demolition blasting bridge pier provided by the invention makes the job practices that bridge lands comprise the following step that carries out in order:
1) at first by the staff, with crushing mechanism, from the side top centre position of bridge pier 1, be formed through a breach 2;
2) in breach 2, pile sandbag temporary support 3, and make the upper end of sandbag temporary support 3 adjacent on the bottom surface of girder 4;
3) remove bridge pier 1 top structure that is positioned at sandbag temporary support 3 both sides, and remove the height of height greater than sandbag temporary support 3, both sides will keep the discrepancy in elevation not too big while removing, so that girder 4 drops down onto on sandbag temporary support 3;
4) on bridge pier 1 both sides, upper end end face, place respectively sandbag temporary support 3, and make the overhead height of the overhead height of the new sandbag temporary support 3 of placing lower than the sandbag temporary support 3 of placement middle part, front;
5) discharge the grains of sand of the sandbag temporary support 3 in the middle of being arranged in, girder 4 is dropped down onto on the sandbag temporary support 3 of both sides;
6) repeating step 2)-5), until land the end of girder 4, can complete the Demolition Construction process thus.
Described sandbag temporary support 3 consists of the canvas exoperidium of making and the grains of sand that are filled in exoperidium inside.
The above; it is only most preferred embodiment of the present invention; not the present invention is imposed any restrictions, every any simple modification, change and equivalent structure of above embodiment being done according to the technology of the present invention essence changes, and all still belongs to the protection domain of technical solution of the present invention.
Claims (2)
1. job practices that non-demolition blasting bridge pier lands bridge is characterized in that: comprise the following step that carries out in order:
1) at first by the staff, with crushing mechanism, from the side top centre position of bridge pier (1), be formed through a breach (2);
2) in breach (2), pile sandbag temporary support (3), and make the upper end of sandbag temporary support (3) adjacent on the bottom surface of girder (4);
3) remove bridge pier (1) top structure that is positioned at sandbag temporary support (3) both sides, and remove the height of height greater than sandbag temporary support (3), so that girder (4) drops down onto on sandbag temporary support (3);
4) on the end face of bridge pier (1) both sides, upper end, place respectively new sandbag temporary support (3), and make the overhead height of the overhead height of the new sandbag temporary support (3) of placing lower than the sandbag temporary support (3) of placement middle part, front;
5) discharge the grains of sand of the sandbag temporary support (3) in the middle of being arranged in, girder (4) is dropped down onto on the sandbag temporary support (3) of both sides;
6) repeating step 2)-5), until land the end of girder (4), can complete the Demolition Construction process thus.
2. non-demolition blasting bridge pier according to claim 1 job practices that bridge is landed is characterized in that: the exoperidium that described sandbag temporary support (3) is made by canvas and the grains of sand that are filled in exoperidium inside form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110401390XA CN102493367B (en) | 2011-12-06 | 2011-12-06 | Non-blasting construction method for dismantling pier to land bridge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110401390XA CN102493367B (en) | 2011-12-06 | 2011-12-06 | Non-blasting construction method for dismantling pier to land bridge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102493367A CN102493367A (en) | 2012-06-13 |
| CN102493367B true CN102493367B (en) | 2013-11-20 |
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| CN201110401390XA Active CN102493367B (en) | 2011-12-06 | 2011-12-06 | Non-blasting construction method for dismantling pier to land bridge |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107587191A (en) * | 2017-07-13 | 2018-01-16 | 晶科能源有限公司 | Fritting polycrystalline cast ingot tailing processing method |
| CN109208493B (en) * | 2018-09-07 | 2021-02-09 | 南昌大学 | Construction method for dismantling superstructure of overline single-box multi-chamber cast-in-place reinforced concrete bridge |
| CN109695250A (en) * | 2019-02-21 | 2019-04-30 | 深圳市工勘岩土集团有限公司 | A kind of deep soft soil layer major diameter open caisson construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3472952B2 (en) * | 1998-02-04 | 2003-12-02 | 東日本旅客鉄道株式会社 | How to change the height of the structure |
| JP4339778B2 (en) * | 2004-11-17 | 2009-10-07 | 三菱重工鉄構エンジニアリング株式会社 | How to remove a bridge |
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