CN103410096B - Box jacking method for performing correction on deflection end by virtue of jack in oblique crossing jacking process - Google Patents
Box jacking method for performing correction on deflection end by virtue of jack in oblique crossing jacking process Download PDFInfo
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- CN103410096B CN103410096B CN201310357697.3A CN201310357697A CN103410096B CN 103410096 B CN103410096 B CN 103410096B CN 201310357697 A CN201310357697 A CN 201310357697A CN 103410096 B CN103410096 B CN 103410096B
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Abstract
The invention discloses a box jacking method for performing correction on a deflection end by virtue of a jack in an oblique crossing jacking process. The method comprises the following steps: arranging a column of guard piles in foundation soil on each of two sides of a box to be jacked along the jacking path on two sides of an existing railway, wherein each adjacent two guard piles are arranged in a staggered mode; arranging a zigzag crown cantilever on the top of each column of guard piles, and forming multiple jack holes in the inner side face, which is close to the box body, of the crown cantilever; arranging lifting jacks in the jack holes; jacking the box body according to a traditional jacking method; and starting the lifting jacks in the jack holes in the crown cantilever on the deflection side when the center line of the box body deviates from a designed center line, and continuously jacking until the box body is jacked in place. The method has an obvious correction effect, correction can be performed by jacking and adjusting the jacking force of the lifting jacks according to the deflection amount, and the correction effect can be observed after jacking is ended; in addition, the correction precision is high, the jack opening number for correction can be inversely calculated according to the deflection torque calculated according to the box jacking process; moreover, the correction facility is simple in structure and convenient in operation.
Description
Technical field
The invention belongs to construction of railways technical field, particularly relate in a kind of oblique jack-in process and utilize top pick to carry out the box-body jacking method of rectifying a deviation in deflection end.
Background technology
Along with the develop rapidly of urban construction, volume of transport is also in continuous increase.When existing railway and highway grade crossing, common way builds frame bridge under existing railway, alleviates with this traffic congestion phenomenon caused because rail track passes in city.When some frame bridge or because service life is long or when cannot meet the requirement of traffic because inner width is too small, displace old frame bridge with regard to needing with new frame bridge.Method of replacing conventional is at present jacking, and this method is that limit removal of old framework bridge and the soil body lateral dominance jack (also claiming top pick) dug out below this bridge will form joint or the jacking below existing railway from existing railway one or both sides of more piece casing of frame bridge main body.But by the impact of the factor such as earth clearance, existing highway, the angle between box-body jacking design center line and existing railway is more and more less, thus increases jacking construction difficulty, namely in this case jacking time casing very easily there is Midline deviation problem.In order to prevent this problem, the main method for correcting error adopted has at present: box back base plate both sides uneven cloth top set pick; 2, the casing both sides basil is uneven eats soil, and namely casing to which lateral deviation turns and just carries out excavating to the soil body at this side edge angle place more; 3, the uneven excavation of the base plate front end soil body.
But in practice of construction process, between actual top power and theory calculate top power, often there is larger deviation, directly will affect the layout of jack during jacking like this; And underground soil property may be reported inconsistent with geological mapping in jack-in process, therefore arrange that the directive significance of jack will reduce according to theory calculate top power; In addition, arrange jack one-sided at box back base plate in jack-in process, the method utilizing top, this side of lifting power to offset deflection torque easily damages finished tank, increases casing wall Vertical Cracks thus more; In addition, utilize the mode of the basil and the uneven shoveling of base plate effect in work progress directly perceived not, and concrete digging degree is unfavorable for grasping.
Summary of the invention
In order to solve the problem, the object of the present invention is to provide in a kind of oblique jack-in process and utilizing top pick to carry out the box-body jacking method of rectifying a deviation in deflection end.
In order to achieve the above object, the box-body jacking method utilizing top pick to carry out rectifying a deviation in deflection end in oblique jack-in process provided by the invention comprises the following step carried out in order:
The box-body jacking method utilizing top pick to carry out rectifying a deviation in deflection end in oblique jack-in process provided by the invention comprises the following step carried out in order:
1) existing railway treating jacking place is reinforced according to conventional reinforcement means;
2) in the jacking region of existing railway both sides, along jacking route, a row fender pile is set respectively in the foundation soil of casing both sides treating jacking, and adjacent two root guard stake setting interlaced with each other, then the Guan Liang of an indention is set at the top of every row fender pile, on Guan Liang, on the medial surface of casing, be recessed to form multiple pick nest thus, thus all fender piles in these row are linked to be entirety;
3) in each pick nest, at least two correction jack are arranged side by side;
4) multiple stage jacking jack and rear back beam are set in the base plate rear end both sides of casing, then limit removal of old framework bridge and dig out the opposite side jacking casing of top power along jacking direction to existing railway that this jack of soil body lateral dominance below this bridge applies;
5) when the center line off-design center line of casing, open be positioned at deflection side Guan Liang on the jack of pick nest, the front end pick of jack is made to be against on the lateral surface of this side box body, the quantity opening pick is determined according to bias size, to apply reverse deflection torque to casing, thus casing is rectified a deviation;
6) continue jacking, and adjust the top power of jack at any time along with top Cheng Zengchang, until casing puts in place along the jacking of jacking direction.
In described often row fender pile, the staggered distance of adjacent two root guard stakes is the radius of fender pile.
The box-body jacking method utilizing top pick to carry out rectifying a deviation in deflection end in oblique jack-in process provided by the invention to treat that the fender pile of jacking casing both sides is crisscross arranged, and the Guan Liang of fender pile upper end is made zigzag, the jack pair casing deflection end in the pick nest being arranged on formation on Guan Liang is utilized to increase opposite force, to rectify a deviation fast to casing, experiment proves that not only rectifying effect is obvious, and can rectify a deviation according to the top power of jacking limit, amount of deflection size limit adjustment jack, jacking terminates to observe rectifying effect; In addition, correction precision is higher, and what the deflection torque inverse that can calculate according to casing top journey to rectify a deviation opens pick quantity; In addition, correction facility structure is simple, easy to operate, is convenient to arrange and adjustable length, therefore can increases substantially speed of application.
Accompanying drawing explanation
Fig. 1-Fig. 5 utilizes top pick to carry out the box-body jacking method work progress schematic diagram of rectifying a deviation in deflection end in oblique jack-in process provided by the invention.
Fig. 6 is the fender pile, Guan Liang and the correction jack structure stereogram that arrange when utilizing this construction method to construct.
Fig. 7 is the fender pile, Guan Liang and the correction jack structure top view that arrange when utilizing this construction method to construct.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the box-body jacking method utilizing top pick to rectify a deviation in deflection end in oblique jack-in process provided by the invention is described in detail.
As shown in Fig. 1-Fig. 7, the box-body jacking method utilizing top pick to carry out rectifying a deviation in deflection end in oblique jack-in process provided by the invention comprises the following step carried out in order:
1) existing railway treating jacking place is reinforced according to conventional reinforcement means;
2) in the jacking region of existing railway 6 both sides, along jacking route, a row fender pile 2 is set respectively in the foundation soil of casing 1 both sides treating jacking, and adjacent two root guard stake 2 setting interlaced with each other, then the hat beam 3 of an indention is set at the top of every row fender pile 2, on hat beam 3, on the medial surface of casing 1, be recessed to form multiple pick nest 4 thus, thus all fender piles 2 in these row are linked to be entirety;
3) in each pick nest 4, at least two correction jack 5 are arranged side by side;
4) multiple stage jacking jack and rear back beam are set in the base plate rear end both sides of casing 1, then limit removal of old framework bridge and dig out top power that this jack of soil body lateral dominance below this bridge applies along jacking direction to the opposite side jacking casing 1 of existing railway 6;
5) when the center line off-design center line of casing 1, open be positioned at deflection side hat beam 3 on the jack 5 of pick nest 4, the front end pick of jack 5 is made to be against on the lateral surface of this side box body 1, the quantity opening pick is determined according to bias size, to apply reverse deflection torque to casing 1, thus casing 1 is rectified a deviation;
6) continue jacking, and adjust the top power of jack 5 at any time along with top Cheng Zengchang, until casing 1 puts in place along the jacking of jacking direction.
In described often row fender pile 2, the staggered distance of adjacent two root guard stakes 2 is the radius of fender pile 2.
In addition, can also open the jack 5 in the jack 5 diagonally opposing corner place pick nest 4 opened with above-mentioned deflection side during correction, to increase deflection torque, effect is more obvious simultaneously.
Claims (2)
1. utilize top pick to carry out a box-body jacking method of rectifying a deviation in deflection end in oblique jack-in process, it is characterized in that: described jacking comprises the following step carried out in order:
1) existing railway treating jacking place is reinforced according to conventional reinforcement means;
2) in the jacking region of existing railway (6) both sides, along jacking route, a row fender pile (2) is set respectively in the foundation soil of casing (1) both sides treating jacking, and adjacent two root guard stake (2) settings interlaced with each other, then the Guan Liang (3) of an indention is set at the top of every row fender pile (2), on the medial surface of the upper close casing (1) of Guan Liang (3), be recessed to form multiple pick nest (4) thus, thus all fender piles (2) in these row are linked to be entirety;
3) in each pick nest (4), at least two correction jack (5) are arranged side by side;
4) multiple stage jacking jack and rear back beam are set in the base plate rear end both sides of casing (1), then limit removal of old framework bridge and dig out top power that this jack of soil body lateral dominance below this bridge applies along jacking direction to the opposite side jacking casing (1) of existing railway (6);
5) when the center line off-design center line of casing (1), open the jack (5) of the upper pick nest (4) of the Guan Liang (3) being positioned at deflection side, the front end pick of jack (5) is made to be against on the lateral surface of this side box body (1), to apply reverse deflection torque to casing (1), thus casing (1) is rectified a deviation;
6) continue jacking, and adjust the top power of correction jack (5) at any time along with top Cheng Zengchang, until casing (1) puts in place along the jacking of jacking direction.
2. jacking according to claim 1, is characterized in that: in described often row fender pile (2), the staggered distance of adjacent two root guard stakes (2) is the radius of fender pile (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310357697.3A CN103410096B (en) | 2013-08-15 | 2013-08-15 | Box jacking method for performing correction on deflection end by virtue of jack in oblique crossing jacking process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310357697.3A CN103410096B (en) | 2013-08-15 | 2013-08-15 | Box jacking method for performing correction on deflection end by virtue of jack in oblique crossing jacking process |
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| CN103410096A CN103410096A (en) | 2013-11-27 |
| CN103410096B true CN103410096B (en) | 2015-06-03 |
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| CN115450118B (en) * | 2022-08-14 | 2024-08-27 | 中铁十局集团第八工程有限公司 | Jacking construction device and construction method for underpass high-speed motor train test line diagonal frame bridge |
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