CN103643640B - Jacking-first and line-reinforcement-second jacking construction method for frame bridge - Google Patents

Jacking-first and line-reinforcement-second jacking construction method for frame bridge Download PDF

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Publication number
CN103643640B
CN103643640B CN201310733499.2A CN201310733499A CN103643640B CN 103643640 B CN103643640 B CN 103643640B CN 201310733499 A CN201310733499 A CN 201310733499A CN 103643640 B CN103643640 B CN 103643640B
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jacking
strand
reinforcement
construction
line
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CN103643640A (en
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黄剑
鄢全成
顾玉峰
王继成
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Tianjin Railway Building Co Ltd China Railway Engineering Bureau No 6 Group
China Railway Sixth Group Co Ltd
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Tianjin Railway Building Co Ltd China Railway Engineering Bureau No 6 Group
China Railway Sixth Group Co Ltd
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Abstract

The invention relates to a jacking-first and line-reinforcement-second jacking construction method for a frame bridge. The method comprises the following steps: arranging a movement-resistant ground anchor; temporarily closing a first strand of line; respectively connecting the other end of each of two steel wire ropes in the movement-resistant ground anchor to a position which is one third to two-thirds of the width of the first strand of line and tightening; removing the existing frame bridge below the first strand of line and jacking a large case to the other side of the line until the large case is positioned below the first strand of line; reinforcing the first strand of line; repeating the above steps to jack large cases below the rest of lines until the whole jacking construction process is completed. Under the condition that the conventional reinforcement method can not be used for construction, according to the jacking-first and line-reinforcement-second jacking construction method, the jacking is firstly carried out, the line is tightened by the movement-resistant ground anchor during the jacking so as to prevent the transverse motion of the line, the single line is reinforced to establish small reinforcement systems, and the small reinforcement systems are gradually connected into a whole reinforcement system. Accordingly, the invention has the advantages of reasonability in construction process design, convenience in construction, short construction time limit and low construction cost.

Description

A kind of Framed underpass bridge construction method of first jacking post-reinforcing circuit
Technical field
The invention belongs to construction of railways technical field, particularly relate to a kind of Framed underpass bridge construction method of first jacking post-reinforcing circuit.
Background technology
Along with the develop rapidly of urban construction, volume of transport is also constantly increasing.Frame bridge has become and has solved railway a kind of new way of intersecting with highway, and bridge places an iron railway, and passes through for vehicle and pedestrian's in bridge opening.But, because some existing frame bridge cannot meet instructions for use, at this moment just need to build new frame bridge in original place.Conventional jacking carries out at present, concrete grammar first reinforces the existing line above old frame bridge before jacking construction, namely first with treat jacking formation frame bridge large-size box opposite face circuit opposite side ground in concreting is anti-moves stake, concreting Guan Liang in stake is moved again anti-, hat beam shape is like chair, be commonly called as chair back, then the crossbeam in track strengthening system is withstood on chair back, play the effect preventing circuit traversing thus, back removal of old framework bridge limit jacking new frame bridge.As everyone knows, the normal operation of existing railway can not be affected in Framed underpass bridge construction, the safety of railway equipment and train travel must be ensured again.Therefore, track strengthening just becomes the key link of jacking construction engineering is also one of difficult point of engineering.But at some in particular cases, such as certain engineering is positioned at railway terminal, therefore circuit is related to more, have 8 strand roads across on existing frame bridge, and be the concrete continuous plate-girder of existing frame bridge below rail, rail is embedded in continuous plate-girder, i.e. continuous tight between plate-girder and rail, therefore cannot carry out track strengthening in a conventional manner before jacking construction.In addition, in order to accelerate speed of application, usually adopting in the case top method, therefore cannot arrange to resist at circuit opposite side and moving stake.
Summary of the invention
In order to solve the problem, the object of the present invention is to provide a kind of Framed underpass bridge construction method of first jacking post-reinforcing circuit.
In order to achieve the above object, the Framed underpass bridge construction method of first jacking post-reinforcing circuit provided by the invention comprises the following step carried out in order:
1) arrange at the foundation ditch back place for placing the large-size box treating jacking and anti-move earth anchor, the described anti-earth anchor that moves comprises many piles, crossbeam and two wire rope; Wherein pile adopts i iron, and many piles vertically arrange in a row in the mode at interval, and middle and lower part is imbedded in foundation soil; Crossbeam also adopts i iron, and it is connected with the top of many piles simultaneously; One end of two wire rope is connected to the position, both sides of crossbeam;
2) the close first strand road for the treatment of the large-size box of jacking of temporary enclosed;
3) the anti-other end moving two wire rope in earth anchor is connected to 1/3rd and 2/3rds places of first strand of line width and strains;
4) the existing frame bridge be positioned at below the first strand road is removed piecemeal from rear end, and utilize the jack that is arranged between large-size box base plate rear end and rear back beam by large-size box below circuit opposite side jacking to the first strand road;
5) conventional reinforcement means is adopted to reinforce the first strand road within the scope of pontic and form the first strand road reinforcement system;
6) the current of the first strand road is recovered;
7) temporary enclosed second strand road;
8) the existing frame bridge be positioned at below the second strand road is removed piecemeal from rear end, and utilize the jack that is arranged between large-size box base plate rear end and rear back beam by large-size box below circuit opposite side jacking to the second strand road;
9) conventional reinforcement means is adopted to reinforce the second strand road within the scope of pontic and form the second strand road reinforcement system, then with steel plate, the respective girders end in the first strand road reinforcement system and the second strand road reinforcement system is coupled together, to form stable reinforcement unitarity;
10) jacking of large-size box under all the other circuits is carried out according to the method for step 6)-step 9), until complete whole jacking construction process.
Many piles in described step 1) are evenly arranged, and the distance between adjacent two piles is 5-10cm.
The Framed underpass bridge construction method of first jacking post-reinforcing circuit provided by the invention is when the reinforcement means of routine cannot be constructed, first carry out jacking, utilize in jacking and anti-move earth anchor circuit is held, to prevent it traversing, and then the reinforcing carrying out single line is to form little reinforcement system, gradually little reinforcement system is connected into integral reinforcing system afterwards, therefore reasonable in design, the easy construction of construction technology, duration are short, and construction cost is low.
Accompanying drawing explanation
Fig. 1 is the Framed underpass bridge construction method work progress schematic diagram of first jacking post-reinforcing circuit provided by the invention.
What use during the construction of Framed underpass bridge construction method that Fig. 2 is employing first jacking post-reinforcing circuit provided by the invention anti-ly moves earth anchor structural representation.
Detailed description of the invention
Be described in detail below in conjunction with the Framed underpass bridge construction method of drawings and the specific embodiments to first jacking post-reinforcing circuit provided by the invention.
As shown in Figure 1 and Figure 2, the Framed underpass bridge construction method of first jacking post-reinforcing circuit provided by the invention comprises the following step carried out in order:
1) arrange at the foundation ditch back place for placing the large-size box 4 treating jacking and anti-move earth anchor 5, the described anti-earth anchor 5 that moves comprises many piles 1, crossbeam 2 and two wire rope 3; Wherein pile 1 adopts i iron, and many piles 1 vertically arrange in a row in the mode at interval, and middle and lower part is imbedded in foundation soil; Crossbeam 2 also adopts i iron, and it is connected with the top of many piles 1, to make all pile 1 uniform force simultaneously; One end of two wire rope 3 is connected to the position, both sides of crossbeam 2; The pile 1 overall length 8m that such as certain engineering adopts, be driven underground 6m, on the ground reserved 2m, and height can regulate according to different engineering from subterranean depth on the ground, and many piles 1 are evenly arranged, and the distance between adjacent two piles 1 is 5-10cm.
2) the close first strand road for the treatment of the large-size box 4 of jacking of temporary enclosed;
3) the anti-other end moving two wire rope 3 in earth anchor 5 is connected to 1/3rd and 2/3rds places of first strand of line width and strains;
4) the existing frame bridge be positioned at below the first strand road is removed piecemeal from rear end, and utilize the jack that is arranged between large-size box 4 base plate rear end and rear back beam by large-size box 4 below circuit opposite side jacking to the first strand road, in jack-in process, the pulling force that wire rope 3 provides in back direction can play the anti-effect moving stake;
5) conventional reinforcement means is adopted to reinforce the first strand road within the scope of pontic and form the first strand road reinforcement system, namely change concrete crosstie, adopt 3-5-3 formula to lay button rail, lay crossbeam and longeron, and between every root crossbeam lower end and large-size box 4 end face, pulley trolley is installed, to reduce lateral resistance to greatest extent in jack-in process thereafter, circuit is kept to stablize;
6) the current of the first strand road is recovered;
7) temporary enclosed second strand road;
8) the existing frame bridge be positioned at below the second strand road is removed piecemeal from rear end, and utilize the jack that is arranged between large-size box 4 base plate rear end and rear back beam by large-size box 4 below circuit opposite side jacking to the second strand road;
9) conventional reinforcement means is adopted to reinforce the second strand road within the scope of pontic and form the second strand road reinforcement system, then with steel plate, the respective girders end in the first strand road reinforcement system and the second strand road reinforcement system is coupled together, to form stable reinforcement unitarity;
10) jacking of large-size box 4 under all the other circuits is carried out according to the method for step 6)-step 9), until complete whole jacking construction process.

Claims (2)

1. a Framed underpass bridge construction method for first jacking post-reinforcing circuit, is characterized in that: this construction method comprises the following step carried out in order:
1) arrange at the foundation ditch back place for placing the large-size box (4) treating jacking and anti-move earth anchor (5), the described anti-earth anchor (5) that moves comprises many piles (1), crossbeam (2) and two wire rope (3); Wherein pile (1) adopts i iron, and many piles (1) vertically arrange in a row in the mode at interval, and middle and lower part is imbedded in foundation soil; Crossbeam (2) also adopts i iron, and it is connected with the top of many piles (1) simultaneously; One end of two wire rope (3) is connected to the position, both sides of crossbeam (2);
2) the close first strand road for the treatment of the large-size box (4) of jacking of temporary enclosed;
3) to move in earth anchor (5) other end of in two wire rope (3) be connected to 1/3rd places of first strand of line width by anti-, the other end of another root is connected to 2/3rds places of first strand of line width and strains;
4) the existing frame bridge be positioned at below the first strand road is removed piecemeal from rear end, and utilize the jack that is arranged between large-size box (4) base plate rear end and rear back beam by large-size box (4) below circuit opposite side jacking to the first strand road;
5) conventional reinforcement means is adopted to reinforce the first strand road within the scope of pontic and form the first strand road reinforcement system;
6) the current of the first strand road is recovered;
7) temporary enclosed second strand road;
8) the existing frame bridge be positioned at below the second strand road is removed piecemeal from rear end, and utilize the jack that is arranged between large-size box (4) base plate rear end and rear back beam by large-size box (4) below circuit opposite side jacking to the second strand road;
9) conventional reinforcement means is adopted to reinforce the second strand road within the scope of pontic and form the second strand road reinforcement system, then with steel plate, the respective girders end in the first strand road reinforcement system and the second strand road reinforcement system is coupled together, to form stable reinforcement unitarity;
10) according to step 6)-step 9) method carry out the jacking of large-size box (4) under all the other circuits, until complete whole jacking construction process.
2. the Framed underpass bridge construction method of first jacking post-reinforcing circuit according to claim 1, it is characterized in that: described step 1) in many piles (1) evenly arrange, the distance between adjacent two piles (1) is 5-10cm.
CN201310733499.2A 2013-12-19 2013-12-19 Jacking-first and line-reinforcement-second jacking construction method for frame bridge Active CN103643640B (en)

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CN104264591B (en) * 2014-10-30 2016-05-11 中铁六局集团有限公司 In the construction method of top, the larger region of circuit discrepancy in elevation bridge
CN104746532A (en) * 2015-04-08 2015-07-01 中铁六局集团天津铁路建设有限公司 Asymmetric constructing method of over-length cabinet with passenger railway lines running underneath
CN105064216B (en) * 2015-07-29 2016-08-24 中铁六局集团天津铁路建设有限公司 Prevent existing line from traversing method occurring during a kind of jacking extra-long frame bridge
CN105113423B (en) * 2015-09-22 2017-06-09 中铁六局集团有限公司 A kind of railway jacked frame bridge bridge tie changes construction method
CN105239475B (en) * 2015-11-04 2017-03-15 中铁六局集团有限公司 Track strengthening structure under complicated existing railway line in culvert jack-in process
CN105908625B (en) * 2016-04-13 2018-04-17 中铁建大桥工程局集团第四工程有限公司 The construction method that method adds frame bridge is drawn under a kind of existing railway line
CN106274556B (en) * 2016-08-05 2018-07-20 中铁六局集团天津铁路建设有限公司 A kind of contact net bar changes shifting method
CN106918412A (en) * 2017-02-14 2017-07-04 北京铁路局天津工程项目管理部 A kind of monitoring method and system of frame core-tube system jacking construction
CN107558375B (en) * 2017-09-12 2018-12-11 中铁六局集团有限公司 The construction method that contact net bar is torn down and reconstructed during a kind of Framed underpass bridge
CN107675628B (en) * 2017-10-12 2018-12-28 中铁六局集团有限公司 It is worn on urban road frame bridge and wears railway in operation jacking construction method under operated subway
CN108166397B (en) * 2017-12-31 2019-08-09 中铁十九局集团第二工程有限公司 Railway Frame Bridge construction method

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