CN107447673B - Method for adjusting frame bridge upper box jacking height difference - Google Patents
Method for adjusting frame bridge upper box jacking height difference Download PDFInfo
- Publication number
- CN107447673B CN107447673B CN201710822647.6A CN201710822647A CN107447673B CN 107447673 B CN107447673 B CN 107447673B CN 201710822647 A CN201710822647 A CN 201710822647A CN 107447673 B CN107447673 B CN 107447673B
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- CN
- China
- Prior art keywords
- babinet
- jacking
- height difference
- soil
- bottom plate
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Classifications
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
Abstract
A method of for adjusting frame bridge upper box jacking height difference.This method uses the integrated construction mode in babinet upper bottom surface lower front end soil digging rear end slip casting, front end new line rear end sinks during solving the problems, such as box-body jacking, effect is clearly, it not only can guarantee that construction continues, the height difference of babinet front and back end can also be eliminated in the range of pushing up journey very little, jacking construction risk is minimized, it is ensured that railway operation safety.This method strong operability, security performance is high, has significant advanced and practicability, while also having very strong dissemination.
Description
Technical field
The invention belongs to undercrossing tunnel Framed underpass bridge technical field of construction, more particularly to one kind for adjusting frame bridge
The method of upper box jacking height difference.
Technical background
With the rapid development of city-building, more and more urban roads wear existing railway circuit under needing, often at present
Method is jacking.This method be first by by the existing railway circuit of jacking influence area using track strengthening system into
Row is reinforced, and then using jack as jacking device, will constitute the babinet of the more piece reinforced concrete structure of frame bridge from both
There is the predetermined position in shoveling below jacking to existing railway circuit in the foundation pit of rail track side.According to previous construction
Experience, when encountering the smaller babinet of slenderness ratio, during jacking construction, the level height difference of babinet front and back end is easy to become
Change.When especially encountering complicated geological, babinet front and back end level height difference is possible to suddenly change occur, and with jack-in process
Carry out level height difference it is increasing, can not continue so as to cause jacking construction, can thus make entire track strengthening body
It is unstability, and circuit trimming can not be completed in the short time, thus may jeopardizes railway operation safety.
When encountering the case where front end new line rear end sinks during box-body jacking, currently used processing method has change
The basil is eaten soil and is carried out above babinet inner bottom plating with the methods of reloading, reduces babinet front and back end level height difference with this.But
This existing method has the following problems：The adjustment range is small for each pick of jack, and the adjustment period is longer, therefore effect is unknown
It is aobvious.
Invention content
To solve the above-mentioned problems, the purpose of the present invention is to provide it is a kind of can be before ensureing track strengthening stable system
Put the method for adjusting frame bridge upper box jacking height difference for solving babinet front end new line rear end subsidence problems.
In order to achieve the above object, include pressing provided by the present invention for the method for adjusting frame bridge upper box jacking height difference
The following steps that sequence carries out：
1) when the babinet that will be in normal condition utilizes jacking along the jacking of jacking direction, after there is front end new line
Sinking situation is held, is analyzed determine on current state lower box vertically by height difference according to on-site actual situations by staff first
Transverse center of gravity axis in jacking direction；
2) region being located under the bottom plate of babinet in front of transverse center of gravity axis is determined as soil digging region；
3) jacking front end is modified in the face of slope surface, to ensure the stability of the soil body, face on babinet
Upper Opening length between front boom plate must in design permissible range, between face and babinet upper plate front end under open
Mouth disclosure satisfy that soil digging job requirements；
4) a groove is formed using mechanically or manually the soil body is excavated downwards in above-mentioned lower opening, makes soil digging thereafter
Operation has space；
5) timber is squeezed into as gib, and using steel pipe in above-mentioned timber and case in face descending angular position
Interim cross-brace is formed between the bottom plate of body, to ensure working space safety；
6) soil body in soil digging region is gradually dug out from front to back since groove rear end, is first drawn using machinery
Soil, machinery can not recycle manually use is long spade is carried out soil digging, finally utilize the high pressure sprayed from giant when operation
Water washes away the soil body on rear side of soil digging region, keeps the front end of babinet hanging；It is real-time to the front and back end elevation of babinet during soil digging
It is observed, to prevent the state of babinet from changing, thereby results in safety accident；
7) the bottom plate height difference positioned at transverse center of gravity axis rear is analyzed, bottom rear is determined according to analysis result
Slip casting hole site, quantity and size, the length of Grouting Pipe, the proportioning and grouting pressure of injection slurry, wherein grouting pressure need
Pressure loss caused by considering length of pipe；
8) injected hole is formed according to the scheme that previous step determines in bottom rear, a note is inserted into each injected hole
Injection slurry, is then intermittently injecting by Grouting Pipe in the soil body below bottom rear using grouting equipment, waits for injection slurry by slurry pipe
Slip casting region is formed after solidification, is thus raised the rear portion of babinet, while hanging front end being made to sink；
9) the front and back end elevation of babinet is observed in real time during slip casting, to prevent the state of babinet from changing, by
This causes safety accident；
10) when babinet is restored to normal condition, above-mentioned interim cross-brace, grouting equipment and Grouting Pipe 7 are removed；
11) jacking for continuing babinet waits for comparing and analyzing the front and back end altitude data of babinet after jacking,
Continue subsequent construction if meeting construction and code requirement, is adjusted again according to the method described above if being unsatisfactory for
It is whole, until work progress terminates.
Catch pit is equipped in the groove, for collecting the muddy water after washing away the soil body, and in time by the mud in catch pit
Water discharges.
Before being used below babinet upper bottom surface provided by the present invention for the method for adjusting frame bridge upper box jacking height difference
The integrated construction mode for holding soil digging rear end slip casting, front end new line rear end sinks during solving the problems, such as box-body jacking, effect
Clearly, it not only can guarantee that construction continues, moreover it is possible to the height difference of babinet front and back end is eliminated in the range of pushing up journey very little, it will
Jacking construction risk minimizes, it is ensured that railway operation safety.This method strong operability, security performance is high, has significant
Advanced and practicability, while also there is very strong dissemination.
Description of the drawings
Fig. 1 is the babinet side view that normal condition is in jack-in process.
Fig. 2 is the babinet side view of front end new line rear end subsidence problems occur in jack-in process.
Fig. 3 is babinet when being adjusted using the method provided by the present invention for adjusting frame bridge upper box jacking height difference
Side view.
Specific implementation mode
In the following with reference to the drawings and specific embodiments to provided by the present invention for adjustment frame bridge upper box jacking height difference
Method is described in detail.
Include the following step carried out in order provided by the present invention for the method for adjusting frame bridge upper box jacking height difference
Suddenly：
1) when the babinet 1 shown in FIG. 1 in normal condition is utilized jacking along the jacking of jacking direction, once occur
Front end new line shown in Fig. 2 rear end sinking situation is analyzed by height difference according to on-site actual situations by staff determine first
Perpendicular to the transverse center of gravity axis in jacking direction on current state lower box 1；
2) as shown in figure 3,2 times regions being located in front of transverse center of gravity axis of bottom plate of babinet 1 are determined as soil digging region
6；
3) jacking front end is modified in the face 3 of slope surface, to ensure the stability of the soil body, face 3 and babinet 1
The upper Opening length gone forward between cantilever slab 4 must be in design permissible range, between 2 front end of face 3 and 1 upper plate of babinet
Under shed disclosure satisfy that soil digging job requirements；
4) a groove 5 is formed using mechanically or manually the soil body is excavated downwards in above-mentioned lower opening, makes drawing thereafter
Native operation has space；
5) squeeze into timber as gib in 3 descending angular position of face, and using steel pipe above-mentioned timber with
Interim cross-brace is formed between the bottom plate 2 of babinet 1, to ensure working space safety；
6) soil body in soil digging region 6 is gradually dug out from front to back since 5 rear end of groove, is first drawn using machinery
Soil, machinery can not recycle manually use is long spade is carried out soil digging, finally utilize the high pressure sprayed from giant when operation
Water washes away the soil body positioned at 6 rear side of soil digging region, keeps the front end of babinet 1 hanging；And catch pit is set in groove 5, is used for
The muddy water after the soil body is washed away in collection, and in time discharges the muddy water in catch pit；To the front and back end of babinet 1 height during soil digging
Journey is observed in real time, to prevent the state of babinet 1 from changing, thereby results in safety accident；
7) 2 height difference of bottom plate positioned at transverse center of gravity axis rear is analyzed, 2 rear portion of bottom plate is determined according to analysis result
Slip casting hole site, quantity and size, the length of Grouting Pipe 7, the proportioning and grouting pressure of injection slurry, wherein grouting pressure need
Pressure loss caused by considering length of pipe；
8) injected hole is formed according to the scheme that previous step determines at 2 rear portion of bottom plate, one is inserted into each injected hole
Then injection slurry is intermittently injecting by Grouting Pipe 7 in the soil body of 2 lower rear of bottom plate using grouting equipment, waits noting by Grouting Pipe 7
Slip casting region 8 is formed after grout cures, is thus raised the rear portion of babinet 1, while hanging front end being made to sink；
9) the front and back end elevation of babinet 1 is observed in real time during slip casting, to prevent the state of babinet 1 from changing,
Thereby result in safety accident；
10) when babinet 1 is restored to normal condition shown in FIG. 1, above-mentioned interim cross-brace, grouting equipment and note are removed
Starch pipe 7；
11) jacking for continuing babinet 1 waits for carrying out to score the front and back end altitude data of babinet 1 after jacking
Analysis, if meet construction and code requirement if continue subsequent construction, if being unsatisfactory for according to the method described above again into
Row adjustment, until work progress terminates.
Claims (2)
1. a kind of method for adjusting frame bridge upper box jacking height difference, it is characterised in that：Described is used to adjust frame bridge
The method of upper box jacking height difference includes the following steps carried out in order：
1) when the babinet (1) that will be in normal condition utilizes jacking along the jacking of jacking direction, after there is front end new line
Sinking situation is held, is analyzed determine on current state lower box (1) by height difference according to on-site actual situations by staff first
Transverse center of gravity axis perpendicular to jacking direction；
2) region being located under the bottom plate (2) of babinet (1) in front of transverse center of gravity axis is determined as soil digging region (6)；
3) jacking front end is modified in the face (3) of slope surface, to ensure the stability of the soil body, face (3) and babinet
(1) the upper Opening length gone forward between cantilever slab (4) must be in design permissible range, face (3) and babinet (1) upper plate
(2) under shed between front end disclosure satisfy that soil digging job requirements；
4) a groove (5) is formed using mechanically or manually the soil body is excavated downwards in above-mentioned lower opening, makes soil digging thereafter
Operation has space；
5) timber is squeezed into as gib, and using steel pipe in above-mentioned timber and case in face (3) descending angular position
Interim cross-brace is formed between the bottom plate (2) of body (1), to ensure working space safety；
6) soil body in soil digging region (6) is gradually dug out from front to back since groove (5) rear end, is first drawn using machinery
Soil, machinery can not recycle manually use is long spade is carried out soil digging, finally utilize the high pressure sprayed from giant when operation
Water washes away the soil body on rear side of soil digging region (6), keeps the front end of babinet (1) hanging；To the front and back end of babinet (1) during soil digging
Elevation is observed in real time, to prevent the state of babinet (1) from changing, thereby results in safety accident；
7) bottom plate (2) height difference positioned at transverse center of gravity axis rear is analyzed, bottom plate (2) rear portion is determined according to analysis result
Slip casting hole site, quantity and size, the length of Grouting Pipe (7), the proportioning and grouting pressure of injection slurry；
8) injected hole is formed according to the scheme that previous step determines at bottom plate (2) rear portion, a note is inserted into each injected hole
Injection slurry, is then intermittently injecting by Grouting Pipe (7) in the soil body of bottom plate (2) lower rear using grouting equipment by slurry pipe (7),
Slip casting region (8) are formed after injection slurry solidification, are thus raised the rear portion of babinet (1), while hanging front end being made to sink；
9) the front and back end elevation of babinet (1) is observed in real time during slip casting, to prevent the state of babinet (1) from changing,
Thereby result in safety accident；
10) when babinet (1) is restored to normal condition, above-mentioned interim cross-brace, grouting equipment and Grouting Pipe (7) are removed；
11) jacking for continuing babinet (1) waits for carrying out to score the front and back end altitude data of babinet (1) after jacking
Analysis, if meet construction and code requirement if continue subsequent construction, if being unsatisfactory for according to the method described above again into
Row adjustment, until work progress terminates.
2. the method according to claim 1 for adjusting frame bridge upper box jacking height difference, it is characterised in that：Described
It is equipped with catch pit in groove (5), for collecting the muddy water after washing away the soil body, and in time discharges the muddy water in catch pit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710822647.6A CN107447673B (en) | 2017-09-13 | 2017-09-13 | Method for adjusting frame bridge upper box jacking height difference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710822647.6A CN107447673B (en) | 2017-09-13 | 2017-09-13 | Method for adjusting frame bridge upper box jacking height difference |
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| Publication Number | Publication Date |
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| CN107447673A CN107447673A (en) | 2017-12-08 |
| CN107447673B true CN107447673B (en) | 2018-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710822647.6A Active CN107447673B (en) | 2017-09-13 | 2017-09-13 | Method for adjusting frame bridge upper box jacking height difference |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111305074B (en) * | 2020-03-23 | 2021-05-14 | 中铁七局集团郑州工程有限公司 | Construction method for integrally dropping jacking box bridge with upward floating exceeding standard |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963061A (en) * | 2010-10-19 | 2011-02-02 | 浙江省建工集团有限责任公司 | Construction method for underground box culvert of existing railway line |
| CN102277880A (en) * | 2011-04-21 | 2011-12-14 | 中铁六局集团有限公司 | Large-sized box jacking control construction method capable of enhancing accuracy |
| CN104652279A (en) * | 2013-11-25 | 2015-05-27 | 北京城建设计发展集团股份有限公司 | Box culvert advancing construction method for building new frame bridge above existing subway structure |
| CN106284112A (en) * | 2016-09-09 | 2017-01-04 | 中铁六局集团有限公司 | Thixotropic slurry construction method is injected in the external follow-up of pipe curtain supporting incremental launching construction raising middle flask |
| JP2017089335A (en) * | 2015-11-17 | 2017-05-25 | 株式会社加藤建設 | Construction method of caisson |
-
2017
- 2017-09-13 CN CN201710822647.6A patent/CN107447673B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963061A (en) * | 2010-10-19 | 2011-02-02 | 浙江省建工集团有限责任公司 | Construction method for underground box culvert of existing railway line |
| CN102277880A (en) * | 2011-04-21 | 2011-12-14 | 中铁六局集团有限公司 | Large-sized box jacking control construction method capable of enhancing accuracy |
| CN104652279A (en) * | 2013-11-25 | 2015-05-27 | 北京城建设计发展集团股份有限公司 | Box culvert advancing construction method for building new frame bridge above existing subway structure |
| JP2017089335A (en) * | 2015-11-17 | 2017-05-25 | 株式会社加藤建設 | Construction method of caisson |
| CN106284112A (en) * | 2016-09-09 | 2017-01-04 | 中铁六局集团有限公司 | Thixotropic slurry construction method is injected in the external follow-up of pipe curtain supporting incremental launching construction raising middle flask |
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| CN107447673A (en) | 2017-12-08 |
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