CN102493367A - 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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- CN102493367A CN102493367A CN201110401390XA CN201110401390A CN102493367A CN 102493367 A CN102493367 A CN 102493367A CN 201110401390X A CN201110401390X A CN 201110401390XA CN 201110401390 A CN201110401390 A CN 201110401390A CN 102493367 A CN102493367 A CN 102493367A
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- temporary support
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- girder
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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 and remove technical field of construction, particularly relate to the job practices that a kind of non-demolition blasting bridge pier lands bridge.
Background technology
Cable stayed bridge is claimed Cable stayed bridge again, is girder directly is pulled in a kind of bridge on the bridge tower with many prestressing force rigidity diagonal members, is by bridge tower, the rigidity diagonal member that is drawn of pressure-bearing 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 the two ends and the middle part of cable stayed bridge respectively; Girder is across on the end face of two bridge piers and tower pier, and it is made up 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 member branches are located at the both sides of bridge tower, and the upper end of every diagonal member is anchored on the bridge tower, and the lower end is anchored on the girder, and it is to be made up of high-strength prestressed steel bundle external wrapping concrete layer., it is removed cable stayed bridge when can't satisfying instructions for use with regard to needs.But in the local time that bridge to be torn open is in that bigger local of city or 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 the jacking of Pneumatic hydraulic jack, jack jacking continuously, large-tonnage jack jacking; 4. hanging method comprises: the plain lifting of cable, 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 to cutting equipment be placed on the bridge floor of desire cutting, like this can be unfavorable to construction safety, the work plane when cutting bridge main body in addition is little, and efficient is lower; The work danger coefficient is high during with direct broken bridge of breaking method or bridge pier, and the work amount is big, and financial cost is high, and is high to staff's operation construction requirement; Need set up support when removing bridge with raising method, workload is big, and financial cost is high; And condition of work is had requirement when removing bridge with hanging method, 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 job practices that bridge is landed comprises the following step that carries out in order:
1) at first connects from the side top centre position of bridge pier with crushing mechanism and form a breach by the staff;
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 when 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 the sandbag temporary support respectively, and make the overhead height of the sandbag temporary support of new placement be lower than the overhead height that the sandbag temporary support of middle part is placed in the front;
5) discharge the grains of sand that are arranged in middle sandbag temporary support, girder is dropped down onto on the sandbag temporary support of both sides;
6) repeating step 2)-5), land until the end of girder, can accomplish the dismounting work progress thus.
The exoperidium grains of sand inner with being filled in exoperidium that described sandbag temporary support is processed by canvas constitute.
The job practices that non-demolition blasting bridge pier provided by the invention lands bridge compared with prior art has the following advantages: 1, safety is good.Control speed and decline scope that bridge descends effectively, guaranteed safety of construction.2, economy.Used equipment is simpler and easy, and construction cost is lower.3, operability is good.Remove machinery and need not be placed on the bridge floor, also need not set up support under the bridge floor, work plane is big, and construction is flexible, and operability is high.4, practicality.Working procedure is compact, and the construction period is short, and is practical.
Description of drawings
Work progress sketch map when Fig. 1 makes the job practices that bridge lands for adopting non-demolition blasting bridge pier provided by the invention.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the job practices that non-demolition blasting bridge pier provided by the invention lands bridge is elaborated.
As shown in Figure 1, the job practices that non-demolition blasting bridge pier provided by the invention lands bridge comprises the following step that carries out in order:
1) at first connects from the side top centre position of bridge pier 1 with crushing mechanism and form a breach 2 by the staff;
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 when removing, so that girder 4 drops down onto on the sandbag temporary support 3;
4) on the end face of both sides, bridge pier 1 upper end, place sandbag temporary support 3 respectively, and make the overhead height of the sandbag temporary support 3 of new placement be lower than the overhead height that the sandbag temporary support 3 of middle part is placed in the front;
5) discharge the grains of sand that are arranged in middle sandbag temporary support 3, girder 4 is dropped down onto on the sandbag temporary support 3 of both sides;
6) repeating step 2)-5), land until the end of girder 4, can accomplish the dismounting work progress thus.
The exoperidium grains of sand inner with being filled in exoperidium that described sandbag temporary support 3 is processed by canvas constitute.
The above; It only is most preferred embodiment of the present invention; Be not that the present invention is done any restriction, every technical spirit changes any simple modification, change and the equivalent structure that above embodiment did according to the present invention, all still belongs to the protection domain of technical scheme of the present invention.
Claims (2)
1. job practices that non-demolition blasting bridge pier lands bridge, it is characterized in that: the job practices that described non-demolition blasting bridge pier lands bridge comprises the following step that carries out in order:
1) at first connects from the side top centre position of bridge pier (1) with crushing mechanism and form a breach (2) by the staff;
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, so that girder (4) drops down onto on the sandbag temporary support (3) greater than sandbag temporary support (3);
4) on the end face of both sides, bridge pier (1) upper end, place sandbag temporary support (3) respectively, and make the overhead height of the sandbag temporary support (3) of new placement be lower than the overhead height that the sandbag temporary support (3) of middle part is placed in the front;
5) discharge the grains of sand that are arranged in middle sandbag temporary support (3), girder (4) is dropped down onto on the sandbag temporary support (3) of both sides;
6) repeating step 2)-5), land until the end of girder (4), can accomplish the dismounting work progress thus.
2. the job practices that non-demolition blasting bridge pier according to claim 1 lands bridge is characterized in that: the exoperidium grains of sand inner with being filled in exoperidium that described sandbag temporary support (3) is processed by canvas constitute.
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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
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| CN102493367A true CN102493367A (en) | 2012-06-13 |
| CN102493367B 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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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107587191A (en) * | 2017-07-13 | 2018-01-16 | 晶科能源有限公司 | Fritting polycrystalline cast ingot tailing processing method |
| CN109208493A (en) * | 2018-09-07 | 2019-01-15 | 南昌大学 | A kind of cross-line single-box multi-cell cast-in-situ steel reinforced concrete bridge superstructure Demolition Construction method |
| 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 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11222812A (en) * | 1998-02-04 | 1999-08-17 | East Japan Railway Co | Changing method of height of structure |
| JP2006144282A (en) * | 2004-11-17 | 2006-06-08 | Mitsubishi Heavy Ind Ltd | Bridge removing method |
-
2011
- 2011-12-06 CN CN201110401390XA patent/CN102493367B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11222812A (en) * | 1998-02-04 | 1999-08-17 | East Japan Railway Co | Changing method of height of structure |
| JP2006144282A (en) * | 2004-11-17 | 2006-06-08 | Mitsubishi Heavy Ind Ltd | Bridge removing method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107587191A (en) * | 2017-07-13 | 2018-01-16 | 晶科能源有限公司 | Fritting polycrystalline cast ingot tailing processing method |
| CN109208493A (en) * | 2018-09-07 | 2019-01-15 | 南昌大学 | A kind of cross-line single-box multi-cell cast-in-situ steel reinforced concrete bridge superstructure Demolition Construction method |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102493367B (en) | 2013-11-20 |
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