CN102808381A - High-water-level silty-soil underneath-pass multi-track railway frame bridge jacking and butting construction method - Google Patents
High-water-level silty-soil underneath-pass multi-track railway frame bridge jacking and butting construction method Download PDFInfo
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- CN102808381A CN102808381A CN2012102993594A CN201210299359A CN102808381A CN 102808381 A CN102808381 A CN 102808381A CN 2012102993594 A CN2012102993594 A CN 2012102993594A CN 201210299359 A CN201210299359 A CN 201210299359A CN 102808381 A CN102808381 A CN 102808381A
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Abstract
The invention discloses a high-water-level silty-soil underneath-pass multi-track railway frame bridge jacking and butting construction method. By respectively arranging waterproof curtains at a junction between a newly constructed frame and the existing frame in a direction along lines and in an area of 8 meters beyond the width of the newly constructed frame along a direction perpendicular to the lines, and by arranging a plurality of dewatering wells at intervals between two lines of a newly constructed line along the direction perpendicular to the lines, underground water level is effectively controlled. The lines are reinforced by taking measures of foundation reinforcement by using subgrade support piles, soil body reinforcing piles, existing pier fender piles and temporary beams. During frame jacking construction, jacking accuracy is guaranteed by taking measures such as firstly excavating a groove before earth excavation and then excavating earth from the bottom of the groove to the top of the bottom plate of a frame, jacking a sliding plate for elongation, setting jacking observation points and relieving load at the position of a pier when the sliding plate is jacked to the position of the pier. The high-water-level silty-soil underneath-pass multi-track railway frame bridge jacking and butting construction method has the advantages that the technical problem of great jacking construction difficulty under the situations of high water level, silty soil and multiple underneath-pass tracks is solved, the quantity of tracks of the lines reinforced by temporary beams is decreased and the influence on the lines is reduced.
Description
Technical field
The present invention relates to wear under a kind of multiply railway framework jacking butt joint job practices, wear the job practices of multiply railway framework jacking butt joint under particularly a kind of high water level silt geology.
Background technology
For wearing multiply railway framework jacking butt joint job practices under the high water level silt geology; Traditional sealing, precipitation way are that newly-built framework and existing framework are linked to be an integral body; Water-stop curtain connects all circuits; Just the number of share of stock of beam hardened link is many in whole construction course, and is big to the railways train operation influence, is difficult to guarantee the circuit traffic safety; In rail wear framework jacking butt joint is constructed down; Need carry out track strengthening to railway line, general track strengthening adopts the just method of beam of setting up, for the rail wear station track is many down; Just the beam hardened link is the situation in multiply road; Usually need a large amount of maintenance personnel, and cause circuit to change easily, influence traffic safety; In the construction; Generally existing bridge pier is taked soldier pile, existing pier cap is apart from casing 57cm only in the jack-in process, and cushion cap is easy to generate change in displacement; A lot of units in charge of construction take existing bridge pier is increased observation personnel's method when the framework jacking; Find to change to stop immediately constructing and carry out the bridge pier maintenance, but still have some problems, the one, circuit changes possibly influence traffic safety; The 2nd, send a large amount of maintenance of way personnel, increased construction cost; The 3rd, circuit changes and has stopped construction infection efficiency of construction and duration.
Summary of the invention
To the above-mentioned defective that exists in the prior art; The invention provides and a kind ofly groundwater table can effectively be controlled, reduce the job practices of wearing multiply railway framework jacking butt joint under the high water level silt geology that just beam hardened link, circuit roadbed and bridge pier are stable, the jacking precision is high, maintenance of way personnel are few; Utilize it can improve construction quality greatly, and reduce construction cost.
The present invention realizes through following technical scheme: wear multiply railway frame bridge jacking butt joint job practices under a kind of high water level silt geology; Comprise sealing, dewatering construction; The track strengthening construction; The framework jacking construction; Its special character is that said sealing, dewatering construction comprise: in newly-built framework and existing framework junction along line direction and beyond newly-built frame width 8 meters scope horizontal path directions carry out the water-stop curtain construction respectively, and between two lines of newly-built circuit, several precipitation wells are set at interval and carry out precipitation along the horizontal path direction; Said track strengthening construction comprises: four jiaos of existing frameworks the roadbed soldier pile is set and is used for the roadbed supporting; At newly-built framework and existing framework junction the soil stabilization stake along line direction is set; The bridge pier fender post is set around existing bridge pier; Set up just beam in newly-built frame side, the bar shaped pedestal of said just beam bottom is provided with high-pressure rotary jet grouting pile and reinforces stake as substrate; In the said framework jacking construction: before the framework jacking is cut the earth, the fluting at the shoveling position, and then the earthwork of pushing up to chassis base at the bottom of the box cut earlier; The preceding observation point that is provided for monitoring jacking direction, elevation in the framework front and back end of jacking, jacking slide plate spreading is to jacking rear end in place, when carrying out jacking construction; When framework jacking to existing bridge pier place; Will be to the unloading of cutting the earth of bridge pier place, unloading can continue jacking after accomplishing, and accomplishes until new and old framework butt joint.
Said roadbed soldier pile is a drilled pile.According to on-the-spot geology, under the prerequisite that satisfies engineering construction technical requirements and quality, select drilled pile for use, economical rationality, easy construction, and adopt drilled pile can guarantee that circuit keeps stable in the process of jacking excavation roadbed.
Said soil stabilization stake is a high-pressure rotary jet grouting pile.Adopt the at first injection stream through high-pressure rotary jet grouting pile machine mouth of high-pressure rotary jet grouting pile, cutting soil also forms whole soil stabilization stake with native mix, and the safe pressure of the line construction that in work progress, can reduce to do business can guarantee subgrade stability in the framework jack-in process.
Said water-stop curtain adopts high-pressure rotary jet grouting pile as water-stop curtain.
Said precipitation well is a large open well.Large open well is applicable to that underground water buries the stratum water intaking that more shallow, aquifer is thin and permeability is stronger, it have gather materials on the spot, the advantage of easy construction.
Said bridge pier fender post is a drilled pile.Under the situation that satisfies standard, quality requirement, adopt drilled pile construction convenient, economical.
For guaranteeing the jacking quality, in the framework jacking construction, when the framework jacking was cut the earth, the length of at every turn cutting the earth was 1.5 meters, and the wide casing 10cm of going out cuts the earth in both sides.
In order to improve the jacking precision, be provided with at least one stopping means in jacking slideway both sides along the jacking direction among the present invention.
Among the present invention; The technical scheme that the track strengthening method in the multiply railway frame bridge jacking butt joint construction of wearing under a kind of high water level silt geology is adopted is: four jiaos of existing frameworks the roadbed soldier pile is set and is used for the roadbed supporting; At newly-built framework and existing framework junction the soil stabilization stake along line direction is set; Around existing bridge pier, the bridge pier fender post is set, sets up just beam in newly-built frame side, the bar shaped pedestal of said just beam bottom is provided with high-pressure rotary jet grouting pile and reinforces stake as substrate.
The invention has the beneficial effects as follows: the present invention has controlled groundwater table effectively through adopting water-stop curtain and the mode that the precipitation well combines, and has guaranteed that groundwater table reduces to following 1 meter of floor, has guaranteed the ground treatment effect.In addition; The present invention is through adopting methods such as roadbed soldier pile, soil stabilization stake, existing bridge pier fender post, just beam underpin, framework jacking to existing bridge pier place's unloading; Guaranteed the stable of circuit roadbed, existing bridge pier, reduced just beam hardened link, thereby reduced maintenance personnel's workload; Improve operating efficiency, guaranteed the safety of driving.The inventive method compared with prior art; Significantly reduced just beam hardened link; Farthest reduced in the work progress influence to rail track operation and operation security; And greatly the reduction of erection time, adopt the inventive method construction can shift to an earlier date about 1 month of duration, greatly reduce construction cost.
Description of drawings
Fig. 1 is the floor map in the specific embodiment of the invention;
Fig. 2 is the enlarged diagram of C part among Fig. 1;
Fig. 3 is the enlarged diagram of D part among Fig. 1;
Fig. 4 is the enlarged diagram of E part among Fig. 1;
Fig. 5 is that A-A among Fig. 1 is to sketch map;
Fig. 6 is that B-B among Fig. 1 is to sketch map;
Fig. 7 is jacking and jacking shoveling kerve front and side schematic view;
Fig. 8 is jacking and bottom land to base top shoveling front and side schematic view;
Fig. 9 is protection of 55# bridge pier and unloading front view;
Figure 10 is protection of 55# bridge pier and unloading side view;
Figure 11 is protection of 56# bridge pier and unloading front view;
Figure 12 is protection of 56# bridge pier and unloading side view;
Among the figure, 1, water-stop curtain, 2, the precipitation well, 3, the bar shaped pier, 4, the roadbed soldier pile; 5, soil stabilization stake, 6, the bridge pier fender post, 7, jacking rear end in place, 8, stopping means, 9, observation point; 10, groove, 11, the earthwork on bottom land to chassis base top, 12, substrate reinforces stake, 13, just beam, 14, the 55# pier cap; 15,56# pier cap, 16, between 55# pier and fender post cubic metre of earth, 17, between 55# pier and framework cubic metre of earth, 18, between 56# pier and fender post cubic metre of earth, 19, between 56# pier and framework cubic metre of earth; 20, foundation pit supporting pile, 21, collecting well, 22, anchoring pile, 23, existing bridge pier.
The specific embodiment
Below in conjunction with accompanying drawing and non-limiting embodiment the present invention is further described:
The present invention be directed to the method for wearing multiply railway framework jacking butt joint construction under the high water level silt geology.Shown in accompanying drawing, newly-built framework docks with existing framework, wears the abundant line of Luo, capital nine uplinks, the up interconnection in Fuyang 3 existing railway lines altogether under the newly-built frame structure, and distance between centers of tracks is respectively 5.35m, 5.21m.The angle of cut is respectively 82.9 °, 83.2 °, 83.2 °.The frame structure adopts 5.4m+12m+12m+5.4m four hole separate type jacking frameworks, and frame structure oblique is tiltedly done, an angle of cut left side 82.46 ° on line (83.02 ° on right line).Directly along connecing, lateral opening frame structure Cross section Design width is 5.4m for newly-built framework and existing framework; Frame construction is built height 8.7m, frame structure design clear height 7.4m, the actual clear height left side line 4.7m (right line 4.9m) that provides; Top plate thickness 0.6m, base plate thickness 0.7m, sidewall thickness 0.6m.Frame structure length left side line 31m (right line 32.5m).Mesopore Cross section Design width is 12m; Frame construction is built height 8.7m, frame structure design clear height 7.0m, the actual clear height left side line 5.9m (right line 5.9m) that provides; Top plate thickness 0.8m, base plate thickness 0.9m, sidewall thickness 0.8m.Frame structure length left side line 45m (right line 46.5m).
The present invention takes sealing, mode jacking that precipitation system+track strengthening system+framework jacking system combines butt joint construction.Its sealing, precipitation system comprise: in newly-built framework and existing framework junction along line direction and beyond newly-built frame width 8 meters scope horizontal path directions carry out water-stop curtain 1 construction respectively; And between two lines of newly-built circuit, several precipitation wells 2 are set at interval and carry out precipitation along the horizontal path direction; Make the synthetic integral body of sealing, precipitation, realized reducing to water level below the floor 1 meter requirement.In the present embodiment, water-stop curtain 1 adopts high-pressure rotary jet grouting pile as water-stop curtain, and the precipitation well adopts large open well.The track strengthening system comprises: pass through drilled pile as roadbed soldier pile 4 four jiaos of existing frameworks; Be used for the roadbed supporting; Carry out the high-pressure rotary-spray pile driving construction as soil stabilization stake 5 at newly-built framework and existing framework junction along line direction, realized reducing the requirement of subgrade stability when just the purpose of beam hardened link satisfies the framework jacking.Simultaneously, around existing bridge pier 23, pass through drilled pile as existing bridge pier fender post 6.Set up just beam 13 in newly-built frame side, bar shaped pier 3 bottoms of said just beam 13 bottoms are provided with high-pressure rotary jet grouting pile and reinforce stake 12 as substrate.During construction, earlier through set up the D type just beam 13 carry out bar shaped pier 3 foundation excavations, after bar shaped pier 3 foundation excavations are accomplished, carry out 3 times high-pressure rotary-spray pile driving constructions of bar shaped pier and 3 constructions of bar shaped pier again.Solved the just requirement of beam base fixed through under just beam, high-pressure rotary jet grouting pile being set.In the framework jacking construction: when the framework jacking is cut the earth, adopt kerve formula excavation; Before the framework jacking is cut the earth, the fluting 10 at the shoveling position, and then the earthwork 11 of pushing up to chassis base at the bottom of the box cut earlier; The both sides wide casing 10cm of going out that cuts the earth, the length of at every turn cutting the earth is 1.5 meters.Before the jacking, be provided for monitoring the observation point 9 of jacking direction, elevation in the framework front and back end, jacking slide plate spreading to jacking rear end 7 in place guarantees that breaking away from slide plate front baffle front end in the framework center of gravity pushed up circuit.In the jacking construction, when the framework jacking when existing bridge pier 23 places, be to the unloading of cutting the earth of bridge pier place; Respectively between between the pier of bridge pier and fender post cubic metre of earth and pier and framework cubic metre of earth is dug out; Unload, unloading can continue jacking after accomplishing, and accomplishes until new and old framework butt joint.Through the bridge pier place is unloaded, realized the requirement that existing bridge pier is stable in the jacking construction.
Practical implementation process of the present invention is following: carry newspaper go slowly the roof beam structure of a plan → water-stop curtain, precipitation well construction → soil stabilization, the construction of roadbed soldier pile construction → destressing → just establish → construction → vertical shift of bar base just beam → framework try top → jacking shoveling → framework jacking → changeover portion construction → traversing just beam → more renew three type bridge ties recovery circuit.
Other parts among the present invention adopt prior art, repeat no more at this.
The foregoing description is only with the explanation of the present invention of opposing; Be not in order to limit the present invention; Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (10)
1. wear multiply railway frame bridge jacking butt joint job practices under a high water level silt geology; Comprise sealing, dewatering construction; The track strengthening construction; The framework jacking construction; It is characterized in that: said sealing, dewatering construction comprise: in newly-built framework and existing framework junction along line direction and beyond newly-built frame width 8 meters scope horizontal path directions carry out water-stop curtain (1) construction respectively, and between two lines of newly-built circuit, several precipitation wells (2) are set at interval and carry out precipitation along the horizontal path direction; Said track strengthening construction comprises: four jiaos of existing frameworks roadbed soldier pile (4) is set and is used for the roadbed supporting; At newly-built framework and existing framework junction the soil stabilization stake (5) along line direction is set; Bridge pier fender post (6) is set around existing bridge pier; Set up just beam (13) in newly-built frame side, bar shaped pier (3) bottom of said just beam (13) bottom is provided with high-pressure rotary jet grouting pile and reinforces stake (12) as substrate; In the said framework jacking construction: before the framework jacking is cut the earth, should slot (10) at the shoveling position earlier, and then the earthwork (11) of pushing up to chassis base at the bottom of the box cut; The preceding observation point (9) that is provided for monitoring jacking direction, elevation in the framework front and back end of jacking, jacking slide plate spreading is to jacking rear end in place (7), when carrying out jacking construction; When framework jacking to existing bridge pier place; Will be to the unloading of cutting the earth of bridge pier place, unloading can continue jacking after accomplishing, and accomplishes until new and old framework butt joint.
2. wear multiply railway frame bridge jacking butt joint job practices under the high water level silt geology according to claim 1, it is characterized in that: said roadbed soldier pile (4) is a drilled pile.
3. wear multiply railway frame bridge jacking butt joint job practices under the high water level silt geology according to claim 1, it is characterized in that: said soil stabilization stake (5) is high-pressure rotary jet grouting pile.
4. wear multiply railway frame bridge jacking butt joint job practices under the high water level silt geology according to claim 1, it is characterized in that: said water-stop curtain (1) adopts high-pressure rotary jet grouting pile as water-stop curtain.
5. wear multiply railway frame bridge jacking butt joint job practices under the high water level silt geology according to claim 1, it is characterized in that: said precipitation well (2) is a large open well.
6. wear multiply railway frame bridge jacking butt joint job practices under the high water level silt geology according to claim 1, it is characterized in that: said bridge pier fender post (6) is a drilled pile.
7. wear multiply railway frame bridge jacking butt joint job practices under the high water level silt geology according to claim 1, it is characterized in that: in the framework jacking construction, when the framework jacking was cut the earth, the length of at every turn cutting the earth was 1.5 meters, and the wide casing 10cm of going out cuts the earth in both sides.
8. wear multiply railway frame bridge jacking butt joint job practices under the high water level silt geology according to claim 1, it is characterized in that: be provided with at least one stopping means (8) along the jacking direction in jacking slideway both sides.
9. wear the track strengthening method in the multiply railway frame bridge jacking butt joint construction under a high water level silt geology; It is characterized in that: four jiaos of existing frameworks roadbed soldier pile (4) is set and is used for the roadbed supporting; At newly-built framework and existing framework junction the soil stabilization stake (5) along line direction is set; Bridge pier fender post (6) is set around existing bridge pier; Set up just beam (13) in newly-built frame side, bar shaped pier (3) bottom of said just beam (13) bottom is provided with high-pressure rotary jet grouting pile and reinforces stake (12) as substrate.
10. wear the track strengthening method in the multiply railway frame bridge jacking butt joint construction under the high water level silt geology according to claim 9, it is characterized in that: said roadbed soldier pile (4) is a drilled pile; Said soil stabilization stake (5) is a high-pressure rotary jet grouting pile; Said bridge pier fender post (6) is a drilled pile.
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| CN201210299359.4A CN102808381B (en) | 2012-08-21 | 2012-08-21 | High-water-level silty-soil underneath-pass multi-track railway frame bridge jacking and butting construction method |
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| CN201210299359.4A CN102808381B (en) | 2012-08-21 | 2012-08-21 | High-water-level silty-soil underneath-pass multi-track railway frame bridge jacking and butting construction method |
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| CN103397600A (en) * | 2013-08-15 | 2013-11-20 | 中铁六局集团天津铁路建设有限公司 | Method for arranging water stops in box body jacking process |
| CN103866694A (en) * | 2014-03-18 | 2014-06-18 | 中铁二十二局集团第一工程有限公司 | Deep water silt layer geological large-span multi-line reinforcing system and jacking culvert construction method |
| CN103967052A (en) * | 2014-05-26 | 2014-08-06 | 沈阳铁道勘察设计院有限公司 | Method for protecting height difference soil bodies of bases of new frame structure bridge and old frame structure bridge |
| CN105908625A (en) * | 2016-04-13 | 2016-08-31 | 中铁建大桥工程局集团第四工程有限公司 | Construction method for adding frame bridge under existing railway line based on dragging method |
| CN106245533A (en) * | 2016-08-30 | 2016-12-21 | 中铁第四勘察设计院集团有限公司 | One the most wired jacking protection construction method |
| CN106544964A (en) * | 2016-11-08 | 2017-03-29 | 中铁六局集团天津铁路建设有限公司 | Road bed and lowering water level construction method during jacking box culvert |
| CN107675628A (en) * | 2017-10-12 | 2018-02-09 | 中铁六局集团有限公司 | Worn on urban road frame bridge and railway in operation jacking construction method is worn under operated subway |
| CN108930226A (en) * | 2018-08-20 | 2018-12-04 | 中铁六局集团天津铁路建设有限公司 | The construction method of jacked frame bridge upper box in the way of spreading slide plate |
| CN110055896A (en) * | 2019-04-22 | 2019-07-26 | 同济大学 | A kind of just beam discharging method when boring across underneath high-speed railway road-bridge transition section |
| CN111041995A (en) * | 2019-12-30 | 2020-04-21 | 中铁六局集团天津铁路建设有限公司 | Construction method for U-shaped frame structure to penetrate high-speed rail bridge obliquely downwards |
| CN112854268A (en) * | 2021-01-06 | 2021-05-28 | 广西大学 | Construction method for jacking and dewatering frame bridge in karst area and geological exploration and treatment method |
| CN113202109A (en) * | 2021-04-11 | 2021-08-03 | 中铁六局集团有限公司 | High-water-level jacking construction method for railway passenger underpass with multiple underpass railways |
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| CN103397600A (en) * | 2013-08-15 | 2013-11-20 | 中铁六局集团天津铁路建设有限公司 | Method for arranging water stops in box body jacking process |
| CN103866694A (en) * | 2014-03-18 | 2014-06-18 | 中铁二十二局集团第一工程有限公司 | Deep water silt layer geological large-span multi-line reinforcing system and jacking culvert construction method |
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| CN106544964A (en) * | 2016-11-08 | 2017-03-29 | 中铁六局集团天津铁路建设有限公司 | Road bed and lowering water level construction method during jacking box culvert |
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| CN110055896A (en) * | 2019-04-22 | 2019-07-26 | 同济大学 | A kind of just beam discharging method when boring across underneath high-speed railway road-bridge transition section |
| CN110055896B (en) * | 2019-04-22 | 2021-02-26 | 同济大学 | Temporary beam unloading method during underpass of high-speed railway road and bridge transition section |
| CN111041995A (en) * | 2019-12-30 | 2020-04-21 | 中铁六局集团天津铁路建设有限公司 | Construction method for U-shaped frame structure to penetrate high-speed rail bridge obliquely downwards |
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| CN112854268A (en) * | 2021-01-06 | 2021-05-28 | 广西大学 | Construction method for jacking and dewatering frame bridge in karst area and geological exploration and treatment method |
| CN112854268B (en) * | 2021-01-06 | 2022-05-24 | 广西大学 | Construction method for jacking and dewatering frame bridge in karst area and geological exploration and treatment method |
| CN113202109A (en) * | 2021-04-11 | 2021-08-03 | 中铁六局集团有限公司 | High-water-level jacking construction method for railway passenger underpass with multiple underpass railways |
| CN113202109B (en) * | 2021-04-11 | 2022-11-15 | 中铁六局集团有限公司 | High-water-level jacking construction method for railway passenger underpass with multiple underpass railways |
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