CN105908625B - The construction method that method adds frame bridge is drawn under a kind of existing railway line - Google Patents

The construction method that method adds frame bridge is drawn under a kind of existing railway line Download PDF

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Publication number
CN105908625B
CN105908625B CN201610227511.6A CN201610227511A CN105908625B CN 105908625 B CN105908625 B CN 105908625B CN 201610227511 A CN201610227511 A CN 201610227511A CN 105908625 B CN105908625 B CN 105908625B
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frame bridge
construction
existing railway
main
slide plate
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CN105908625A (en
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刘俊奇
盖青山
尤春颖
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Middle Iron Is Built 4th Engineering Co Ltd Of Group Of Bridge Project Office
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Middle Iron Is Built 4th Engineering Co Ltd Of Group Of Bridge Project Office
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges

Abstract

The construction method that method adds frame bridge is drawn under a kind of existing railway line, it is related to a kind of frame bridge construction method.The present invention solves when existing jacking adds frame bridge that construction cost is higher, and speed of application is slower, and the horizontal level built bridge of jack-in process center and elevation are not easily controlled, and the problem of relatively large deviation often occur.The method of the present invention comprises the following steps:Step 1: excavation of foundation pit;Step 2: slide plate is constructed;Step 3: separation layer is constructed;Step 4: prefabricated frame bridge formation main body;Step 5: waterproof layer and the protective layer construction of frame bridge main body;Step 6: retaining wall or antiskid pile driving construction;Step 7: horizontal orientation drills;Step 8: penetrate more pulling force rod pieces;Step 9: track strengthening;Step 10: dilatory frame bridge main body;Step 11: back filling behind abutment;Step 12: the soil between retaining wall or friction pile and frame bridge main body is scooped away and transported outward.The present invention is used to add frame bridge under existing railway line.

Description

The construction method that method adds frame bridge is drawn under a kind of existing railway line
Technical field
Method, which is drawn, the present invention relates to a kind of frame bridge construction method, under more particularly to a kind of existing railway line adds frame bridge Construction method.
Background technology
When frame bridge is created under existing railway line, existing construction method is to use pipe jacking method.Jacking exists The shortcomings that have:1) force-transmitting pole and distribution beam are in pressured state when in use, since the slenderness ratio of rod piece is larger, easy unstability, The pressure that can be born is smaller, therefore cannot give full play to the mechanical property of material, causes the usage amount of force-transmitting pole and distribution beam non- Chang great, usually up to tens tons, it is higher to have bad luck cost;As soon as 2) needed in jack-in process per the haul distance of jacking jack Crane is used constantly to replace the force-transmitting pole of different length, the need of work for outward transport of during which cutting the earth in frame bridge stops, construction Speed is slower, and cost is higher;3) horizontal level and elevation that jack-in process center is built bridge are not easily controlled, and are often occurred larger Deviation.
The content of the invention
Construction cost is higher in order to solve when existing jacking adds frame bridge by the present invention, and speed of application is slower, Yi Jiding The horizontal level of frame bridge and elevation are not easily controlled during, the problem of relatively large deviation often occur, there is provided a kind of existing The construction method that method adds frame bridge is drawn under railway line.
In order to solve the above-mentioned technical problem the present invention adopts the technical scheme that:Dragged under a kind of existing railway line of the present invention The construction method that daraf(reciprocal of farad) adds frame bridge comprises the following steps:
Step 1: excavation of foundation pit:In the both sides of existing railway circuit, the mode of slope excavation or supporting excavation is taken to dig base Hole, the substrate absolute altitude to design is dug by foundation pit;
Step 2: slide plate is constructed:
Foundation bearing capacity is detected, after detection is qualified, carries out the construction of slide plate, slide plate is made of armored concrete, first in iron Blotter is laid with the foundation pit substrate of route road wherein side, the binding or welding of slide plate reinforcing bar is then carried out, finally pours Slide plate is made in concrete, and slide plate will strictly control the flatness of slide plate top surface when constructing;
Step 3: separation layer is constructed:
In slide plate top surface coated with paraffin layer, laminated plastics cloth is laid with paraffin layer, talcum is uniformly spilt between every layer of plastic cloth Powder;
Step 4: prefabricated frame bridge formation main body:
The prefabricated frame bridge formation main body above the separation layer of step 3, frame bridge main body are made of armored concrete, frame bridge Main body casting concrete at twice, the bottom plate of first time pouring frame bridge main body, two surface sides of second of pouring frame bridge main body Wall is drawn on wall, top plate and two sides, and multiple first ducts, the multiple first hole are reserved on every Orly tie wall of frame bridge main body Face, the rear side per Orly tie wall set multiple built-in fittings one by one up and down in road, and the position of built-in fitting is corresponded with the first duct, Measures of preventing water is taken between frame bridge main body and existing aileron, at the concrete crack of frame bridge main body according to construction requirement;
Step 5: waterproof layer and the protective layer construction of frame bridge main body:
After the concrete surface of frame bridge main body prefabricated in step 4 is fully dry, frame bridge body outer surface into The construction of row waterproof layer, after the completion of construction of waterproof layer, carries out the construction of protective layer outside waterproof layer;
Step 6: retaining wall or antiskid pile driving construction:
In the foundation pit of rail track opposite side, according to topographic features, concrete gravity type retaining wall or reinforcing bar is set to mix Solidifying soil friction pile, reserves multiple second ducts on retaining wall or friction pile, multiple second ducts are set in two row, more on two row Multiple first ducts on wall face one by one is drawn on a second duct and two sides;
Step 7: horizontal orientation drills:
Multiple 3rd ducts are bored under existing railway circuit using horizontal directional drilling machine, multiple 3rd ducts are set in two row Put, multiple first ducts on wall face one by one is drawn on multiple 3rd ducts and the two sides on two row;
Step 8: penetrate more pulling force rod pieces:
Pulling force rod piece is horizontally disposed with, and more pulling force rod pieces are corresponded with multiple first ducts, and the one of every pulling force rod piece After end passes through corresponding first duct one by one, be anchored at using anchoring piece on corresponding built-in fitting, every pulling force rod piece it is another End sequentially passes through front with behind the 3rd duct and the second duct of corresponding first duct face, penetrating horizontal transmission device;
Step 9: track strengthening:
Using D types, just beam or I-steel lift beam method to existing railway circuit progress track strengthening in length and breadth;
Step 10: dilatory frame bridge main body:
Start horizontal transmission device, more pulling force rod pieces are synchronized continuously elongated, make frame bridge main body in stayed mast It is continuously advanced under the pulling of part to existing railway circuit direction, with the advance of frame bridge main body, excavator or loading machine are from rear Side, which enters, to be cut the earth and transports outward in frame bridge main body, until frame bridge main body is dragged to the design position below existing railway circuit Put;
Step 11: back filling behind abutment:
Back filling behind abutment is carried out using infiltration soil or concrete, it is ensured that the compactness of backfill is qualified;
Step 12: scooping away and transporting outward the soil between retaining wall or friction pile and frame bridge main body, make frame bridge main body Connected with the foundation pit of existing railway circuit both sides.
The beneficial effects of the invention are as follows:
1st, the stayed mast number of packages amount that uses of the present invention is about the quantity of force-transmitting pole that jacking uses and distribution beam 10%~20%, save turnover expense about 50%~70%;
2nd, the frame bridge main body time in place of the invention is about the 20% of jacking, and speed of application is fast, improves at the same time The service efficiency of digging machine, saves expense for using mechanical equipment about 60%~80%;
3rd, the present invention, without using crane, eliminates the usage charges of crane and coordinates the artificial of crane compared with jacking Take;
4th, the present invention sets duct in advance under frame bridge main body, railway line and on retaining wall, and ensures the position in duct It is consistent with elevation, ensure that the accuracy of the horizontal level and elevation of frame bridge;
5th, the invention enables frame bridge to be continuously advanced, and can effectively reduce preceding skylight caused by railway bed caves in and side day Window, reduces the quantity of backfill, is conducive to the stabilization of circuit;
6th, the present invention need not put into special equipment, put into small, strong operability, applied widely, have very big promotion price Value.
Brief description of the drawings
Fig. 1 is the construction schematic diagram of the present invention;
Fig. 2 is the left view of Fig. 1 center bridge formation main bodys;
Fig. 3 is the front view with five corresponding slide plate of embodiment;
Fig. 4 is the enlarged drawing of a-quadrant in Fig. 1.
Embodiment
Embodiment one:Illustrate present embodiment, a kind of existing railway line of present embodiment with reference to Fig. 1 to Fig. 3 Dilatory method is added the construction method of frame bridge and is comprised the following steps down:
Step 1: excavation of foundation pit:In the both sides of existing railway circuit 1, the mode of slope excavation or supporting excavation is taken to dig Foundation pit 2, is dug the substrate absolute altitude of design by foundation pit 2;
Step 2: slide plate is constructed:
Foundation bearing capacity is detected, after detection is qualified, carries out the construction of slide plate 4, slide plate 4 is made of armored concrete, first exists Blotter is laid with 2 substrate of foundation pit of rail track wherein side, the binding or welding of slide plate reinforcing bar is then carried out, finally pours Build concrete and slide plate 4 is made, slide plate will strictly control the flatness of 4 top surface of slide plate when constructing;
Step 3: separation layer is constructed:
In the top surface coated with paraffin layer of slide plate 4, laminated plastics cloth is laid with paraffin layer, cunning is uniformly spilt between every layer of plastic cloth Mountain flour;
Step 4: prefabricated frame bridge formation main body 3:
The prefabricated frame bridge formation main body 3 above the separation layer of step 3, frame bridge main body 3 is made of armored concrete, frame The casting concrete at twice of bridge main body 3, the bottom plate 3-1 of first time pouring frame bridge main body 3, second pouring frame bridge main body Draw wall 3-4 for two sides side wall 3-2, top plate 3-3 and two sides, reserved multiple first on every Orly tie wall 3-4 of frame bridge main body 3 Face, the rear side per Orly tie wall 3-4 set multiple built-in fittings one by one up and down by duct 3-5, the multiple first duct 3-5, in advance The position of embedded part and the first duct 3-5 are corresponded, between frame bridge main body 3 and existing aileron, the concrete of frame bridge main body 3 At gap measures of preventing water is taken according to construction requirement;
Step 5: waterproof layer and the protective layer construction of frame bridge main body 3:
After the concrete surface of frame bridge main body 3 prefabricated in step 4 is fully dry, in 3 outer surface of frame bridge main body The construction of waterproof layer is carried out, after the completion of construction of waterproof layer, the construction of protective layer is carried out outside waterproof layer;
Step 6: retaining wall or friction pile 6 are constructed:
In the foundation pit 2 of rail track opposite side, according to topographic features, concrete gravity type retaining wall or reinforcing bar is set to mix Native friction pile is coagulated, multiple second ducts are reserved on retaining wall or friction pile 6, multiple second ducts are arranged in two row settings, two Multiple second ducts are up and down and multiple first duct 3-5 on wall 3-4 face one by one is drawn on two sides;
Step 7: horizontal orientation drills:
Multiple 3rd ducts are bored 1 time in existing railway circuit using horizontal directional drilling machine, multiple 3rd ducts are set in two row Put, multiple first duct 3-5 on wall 3-4 face one by one is drawn on multiple 3rd ducts and the two sides on two row;
Step 8: penetrate more pulling force rod pieces 7:
Pulling force rod piece 7 is horizontally disposed, and more pulling force rod pieces 7 are corresponded with multiple first duct 3-5, every pulling force rod piece After 7 one end passes through corresponding first duct 3-5 one by one, it is anchored at using anchoring piece on corresponding built-in fitting, every stayed mast The other end of part 7 sequentially passes through front with behind the 3rd duct and the second duct of corresponding first duct 3-5 faces, penetrating horizontal biography Dynamic device;
Step 9: track strengthening:
Using D types, just beam or I-steel lift beam method to the progress track strengthening of existing railway circuit 1 in length and breadth;
Step 10: dilatory frame bridge main body 3:
Start horizontal transmission device, more pulling force rod pieces 7 are synchronized continuously elongated, make frame bridge main body 3 at more It is continuously advanced under the pulling of pulling force rod piece 7 to 1 direction of existing railway circuit, with the advance of frame bridge main body 3, excavator or dress Carrier aircraft enters from rear to be cut the earth and transports outward in frame bridge main body 3, until frame bridge main body 3 is dragged under existing railway circuit 1 The design position of side;
Step 11: back filling behind abutment:
Back filling behind abutment is carried out using infiltration soil or concrete, it is ensured that the compactness of backfill is qualified;
Step 12: scooping away and transporting outward the soil between retaining wall or friction pile 6 and frame bridge main body 3, make frame bridge master Body 3 is connected with the foundation pit 2 of 1 both sides of existing railway circuit.
The flatness of 4 top surface concrete of slide plate crosses resistance when senior general increases the startup of frame bridge main body 3, therefore slide plate is constructed When strictly to control the flatness of 4 top surface of slide plate.
Frame bridge main body 3 is the front and rear frame structure connected, and the front opening of frame bridge main body 3 is directed toward existing railway circuit 1, every surface side wall outside vertical of frame bridge main body 3 is connected with the dilatory wall 3-4 of one side, and two sides draws wall 3-4 and is arranged on frame bridge The rear end of main body 3;During prefabricated frame bridge formation main body 3, it should be noted that avoid steel bar end from scratching plastic cloth;The waterproof layer of frame bridge main body 3 When constructing with protective layer, it should be noted that avoid concrete protective layer pad from scratching plastic cloth.
Pvc pipe can be used to reserve multiple second ducts on retaining wall or friction pile 6, for wearing pulling force rod piece 7.
When horizontal orientation drills, the diameter in the 3rd duct, quantity are according to the pulling force of calculating and the specifications and models of pulling force rod piece 7 Calculate and determine;
During track strengthening, D types just beam basis using artificial digging pile or Extended chemotherapy pattern.
The dilatory of frame bridge main body 3 must carry out in the train interval on existing railway circuit 1, and track strengthening is not torn open Before removing, 45km/h is not to be exceeded in same speed limit driving, train F-Zero.
It is ensured that the compactness of backfill is qualified during back filling behind abutment, line sinking is prevented.
When frame bridge main body 3 is stowed to when being overlapped with frame bridge main body 3 shown in dotted lines in Figure 1, i.e. representational framework bridge Main body 3 is in place.
Embodiment two:Excavation of foundation pit in the step of present embodiment one takes excavator operation, digs to being higher than During substrate absolute altitude 0.3m~0.5m of design, use instead and manually continue to be excavated to the substrate absolute altitude of design.So excavate, a rate of advance It hurry up, hand excavation is easy to repair the shape of foundation pit 2.Other steps are identical with embodiment one.
Embodiment three:In the step of present embodiment one before excavation of foundation pit, when detecting that there are underground at foundation pit 2 During water, withdrawal, well-points dewatering or water-stop curtain need to be taken to carry out precipitation.Above dewatering measure will be according to soil property situation and ground Lower water water level, water, foundation pit size are performed.Other steps are identical with embodiment two.
Embodiment four:Illustrate present embodiment with reference to Fig. 1, two the step of present embodiment in, the lower part of slide plate 4 Equipped with multiple rows of ground anchor beam 5, multiple shear reinforcements are often connected with vertically between row's ground anchor beam 5 and slide plate 4.It is arranged such, it is ensured that When frame bridge main body 3 starts, slide plate 4 will not move, and meet design and use requirement.Other steps and embodiment one, Two or three is identical.
Embodiment five:Illustrate present embodiment with reference to Fig. 3, two the step of present embodiment in slide plate 4 to both There is 1 direction of rail track to be equipped with slope than the upward slope for 5 ‰, the front end of slide plate 4 is provided with 2%~4% fore slope, fore slope Length is k, k 1m.Fore slope refers to:The thickness of 4 front end of slide plate is h1, and the slide plate thickness at 4 front end 1m of slide plate is h2, The difference of h2 and h1 is h3, h3/h2=2%~4%.It is so designed that, meets construction requirement.Other steps and embodiment Four is identical.
Embodiment six:The thickness of paraffin layer is 2cm in the step of present embodiment three, and the number of plies of plastic cloth is 2 Layer.It is so designed that, the resistance in 3 moving process of frame bridge main body can be reduced.Other steps are identical with embodiment five.
Embodiment seven:Waterproof layer in the step of present embodiment five is water-repellent paint, and protective layer is concrete. The setting of protective layer can prevent frame bridge main body 3 from being destroyed during advancing be subject to sandstone under railway line.Other steps with it is specific Embodiment five or six is identical.
Embodiment eight:Pulling force rod piece 7 in the step of present embodiment eight is fining twisted steel.It can be achieved to frame The pulling of bridge formation main body 3, while compared with common steel strand wires, fining twisted steel intensity bigger, and even if unexpected fracture, Personal injury will not be caused to construction personnel, ensure that the safe and reliable of work progress.Other steps and embodiment seven It is identical.
Embodiment nine:Every pulling force rod piece 7 of present embodiment is detachably connected from beginning to end by multistage fining twisted steel Connect and form, the length of every section of fining twisted steel is 1.5m~2.0m.With dilatory process, pulling force rod piece 7 is constantly passed from level It is drawn out, is so designed that in dynamic device, easy to carry out segmentation dismounting to the pulling force rod piece having been pulled out with dilatory process, so that The tap length of foundation pit 2 can be reduced, use manpower and material resources sparingly financial resources.Other steps are identical with embodiment eight.
Embodiment ten:Illustrate present embodiment with reference to Fig. 4, eight the step of present embodiment in horizontal conveyor dress Multiple centre-hole jacks 8 are set to, face is arranged on jack stand multiple centre-hole jacks one by one about 8, is each worn One end of core type jack 8 is acted against on retaining wall or friction pile 6, and the other end of each centre-hole jack 8 acts against front Abut against on plate 9, abut against plate 9 it is vertical it is affixed on the ground, multiple 8 respective entrances of centre-hole jack and multiple second ducts Face one by one, after every pulling force rod piece 7 is pierced by from corresponding second duct, then sequentially passes through 8 He of centre-hole jack in front Abut against plate 9.Start multiple centre-hole jacks 8 at the same time, you can synchronously continuously stretch more pulling force rod pieces 7 forward, by frame Bridge formation main body 3 is pulled forward to design position.Other steps are identical with embodiment nine.

Claims (10)

1. the construction method that method adds frame bridge is drawn under a kind of existing railway line, it is characterised in that:It comprises the following steps:
Step 1: excavation of foundation pit:In the both sides of existing railway circuit (1), the mode of slope excavation or supporting excavation is taken to dig base Cheat (2), foundation pit (2) is dug into the substrate absolute altitude to design;
Step 2: slide plate is constructed:
Foundation bearing capacity is detected, after detection is qualified, carries out the construction of slide plate (4), slide plate (4) is made of armored concrete, first exists Blotter is laid with foundation pit (2) substrate of rail track wherein side, then carries out the binding or welding of slide plate reinforcing bar, finally Slide plate (4) is made in casting concrete, and slide plate will strictly control the flatness of slide plate (4) top surface when constructing;
Step 3: separation layer is constructed:
In the top surface coated with paraffin layer of slide plate (4), laminated plastics cloth is laid with paraffin layer, talcum is uniformly spilt between every layer of plastic cloth Powder;
Step 4: prefabricated frame bridge formation main body (3):
The prefabricated frame bridge formation main body (3) above the separation layer of step 3, frame bridge main body (3) are made of armored concrete, frame Bridge main body (3) casting concrete at twice, the bottom plate (3-1) of first time pouring frame bridge main body (3), second of pouring frame bridge Wall (3-4), every Orly tie wall (3-4) of frame bridge main body (3) are drawn in two sides side wall (3-2), top plate (3-3) and the two sides of main body On reserve multiple first ducts (3-5), the multiple first duct (3-5) face one by one up and down, per Orly tie wall (3-4) Rear side sets multiple built-in fittings, and the position of built-in fitting is corresponded with the first duct (3-5), frame bridge main body (3) and the existing wing Measures of preventing water is taken between wall, at the concrete crack of frame bridge main body (3) according to construction requirement;
Step 5: waterproof layer and the protective layer construction of frame bridge main body (3):
After the concrete surface of frame bridge main body (3) prefabricated in step 4 is fully dry, in frame bridge main body (3) outer surface The construction of waterproof layer is carried out, after the completion of construction of waterproof layer, the construction of protective layer is carried out outside waterproof layer;
Step 6: retaining wall or friction pile (6) construction:
In the foundation pit (2) of rail track opposite side, according to topographic features, concrete gravity type retaining wall or reinforced concrete are set Multiple second ducts are reserved on native friction pile, retaining wall or friction pile (6), multiple second ducts are set in two row, on two row Multiple first ducts (3-5) on wall (3-4) face one by one is drawn on multiple second ducts and two sides;
Step 7: horizontal orientation drills:
Multiple 3rd ducts are bored under existing railway circuit (1) using horizontal directional drilling machine, multiple 3rd ducts are set in two row, Multiple first ducts (3-5) on wall (3-4) face one by one is drawn on multiple 3rd ducts and two sides on two row;
Step 8: penetrate more pulling force rod pieces (7):
Pulling force rod piece (7) is horizontally disposed, and more pulling force rod pieces (7) correspond with multiple first ducts (3-5), every stayed mast After one end of part (7) passes through corresponding first duct (3-5) one by one, it is anchored at using anchoring piece on corresponding built-in fitting, every After the other end of pulling force rod piece (7) sequentially passes through front and the 3rd duct and the second duct of corresponding first duct (3-5) face, Penetrate horizontal transmission device;
Step 9: track strengthening:
Using D types, just beam or I-steel lift beam method to existing railway circuit (1) progress track strengthening in length and breadth;
Step 10: dilatory frame bridge main body (3):
Start horizontal transmission device, more pulling force rod pieces (7) are synchronized continuously elongated, make frame bridge main body (3) at more It is continuously advanced to existing railway circuit (1) direction under the pulling of pulling force rod piece (7), with the advance of frame bridge main body (3), excavates Machine or loading machine enter from rear to be cut the earth and transports outward in frame bridge main body (3), until frame bridge main body (3) is dragged to existing iron Design position below route road (1);
Step 11: back filling behind abutment:
Back filling behind abutment is carried out using infiltration soil or concrete, it is ensured that the compactness of backfill is qualified;
Step 12: scooping away and transporting outward the soil between retaining wall or friction pile (6) and frame bridge main body (3), make frame bridge master Body (3) is connected with the foundation pit (2) of existing railway circuit (1) both sides.
2. drawing the construction method that method adds frame bridge under a kind of existing railway line according to claim 1, its feature exists In:Excavation of foundation pit in step 1 takes excavator operation, when digging to higher than the substrate absolute altitude 0.3m~0.5m designed, uses people instead Work continues to be excavated to the substrate absolute altitude of design.
3. drawing the construction method that method adds frame bridge under a kind of existing railway line according to claim 2, its feature exists In:In step 1 before excavation of foundation pit, when detect foundation pit (2) place there are during underground water, need to take withdrawal, well-points dewatering or Water-stop curtain carries out precipitation.
4. drawing the construction method that method adds frame bridge under a kind of existing railway line according to claim 1,2 or 3, it is special Sign is:In step 2, the lower part of slide plate (4) is equipped with multiple rows of ground anchor beam (5), often vertical between row's ground anchor beam (5) and slide plate (4) It is connected with multiple shear reinforcements.
5. drawing the construction method that method adds frame bridge under a kind of existing railway line according to claim 4, its feature exists In:Slide plate (4) in step 2 is set to existing railway circuit (1) direction equipped with slope than the upward slope for 5 ‰, the front end of slide plate (4) 2%~4% fore slope is equipped with, the length on fore slope is k, k=1m.
6. drawing the construction method that method adds frame bridge under a kind of existing railway line according to claim 5, its feature exists In:The thickness of paraffin layer is 2cm in step 3, and the number of plies of plastic cloth is 2 layers.
7. the construction method that method adds frame bridge, its feature are drawn under a kind of existing railway line according to claim 5 or 6 It is:Waterproof layer in step 5 is water-repellent paint, and protective layer is concrete.
8. drawing the construction method that method adds frame bridge under a kind of existing railway line according to claim 7, its feature exists In:Pulling force rod piece (7) in step 8 is fining twisted steel.
9. drawing the construction method that method adds frame bridge under a kind of existing railway line according to claim 8, its feature exists In:Every pulling force rod piece (7) is detachably formed by connecting from beginning to end by multistage fining twisted steel, and the length of every section of fining twisted steel is 1.5m~2.0m.
10. drawing the construction method that method adds frame bridge under a kind of existing railway line according to claim 9, its feature exists In:Horizontal transmission device in step 8 is multiple centre-hole jacks (8), and multiple centre-hole jacks (8) are up and down one by one just To being arranged on jack stand, one end of each centre-hole jack (8) is acted against on retaining wall or friction pile (6), each The other end of centre-hole jack (8) acts against the abutting against on plate (9) of front, abut against plate (9) it is vertical it is affixed on the ground, it is multiple Centre-hole jack (8) respective entrance and multiple second ducts face one by one, every pulling force rod piece (7) is from corresponding second hole After road is pierced by, then sequentially passes through the centre-hole jack (8) in front and abut against plate (9).
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111764286A (en) * 2020-06-16 2020-10-13 中铁二十四局集团有限公司 Frame bridge jacking construction method
CN111764286B (en) * 2020-06-16 2021-04-02 中铁二十四局集团有限公司 Frame bridge jacking construction method

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