CN103485288A - Construction process of double-layer jacking culvert penetrating through existing railway lines - Google Patents

Construction process of double-layer jacking culvert penetrating through existing railway lines Download PDF

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Publication number
CN103485288A
CN103485288A CN201310474056.6A CN201310474056A CN103485288A CN 103485288 A CN103485288 A CN 103485288A CN 201310474056 A CN201310474056 A CN 201310474056A CN 103485288 A CN103485288 A CN 103485288A
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China
Prior art keywords
culverts
bridges
jacking
strata
wired
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CN201310474056.6A
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CN103485288B (en
Inventor
何占忠
孙涛
李小龙
徐开富
刘磊
刘虎臣
李军鹏
马林
杨进瑜
苌建奎
张永胜
谢保良
金奇峰
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China Railway First Engineering Group Co Ltd
Second Construction Co Ltd of China Railway First Engineering Group Co Ltd
Second Engineering Co Ltd of China Railway First Engineering Group Co Ltd
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China Railway First Engineering Group Co Ltd
Second Construction Co Ltd of China Railway First Engineering Group Co Ltd
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Priority to CN201310474056.6A priority Critical patent/CN103485288B/en
Publication of CN103485288A publication Critical patent/CN103485288A/en
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Abstract

The invention discloses a construction process of a double-layer jacking culvert penetrating through existing railway lines. The construction process includes the following steps: (1) precasting of an upper-layer bridge culvert body, (2) construction of a back and a back beam used for jacking of the upper-layer bridge culvert body, (3) reinforcement of the existing railway lines, wherein the existing railway lines are reinforced through a line overhead reinforcing structure, (4) digging of a jacking pit of the upper-layer bridge culvert body, (5) jacking of the upper-layer bridge culvert body, (6) construction of a bottom supporting system of the upper-layer bridge culvert body, (7) detachment of the line overhead reinforcing structure, (8) precasting of a lower-layer bridge culvert body, (9) construction of a back and a back beam used for jacking of the lower-layer bridge culvert body, (10) digging of a jacking pit of the lower-layer bridge culver body, (11) jacking of the lower-layer bridge culvert body, and (12) concrete pouring, wherein after the lower-layer bridge culvert body is jacked properly, concrete is poured between the upper-layer bridge culvert body and the lower-layer bridge culvert body. The method is simple, reasonable in design, low in investment construction cost and good in using effect, the construction process of the double-layer jacking culvert can be easily, conveniently and quickly finished and is high in quality, and the construction process is safe and reliable.

Description

A kind ofly pass through both wired double-deck jackings and contain construction technology
Technical field
The invention belongs to both wired jacking bridge and culvert technical field of construction, especially relate to a kind of both wired double-deck jacking culvert construction technology of passing through.
Background technology
It is, under the prerequisite firm at ground, prefabricated box culvert pushing tow to be put in place that construction is contained in jacking, specifically in the situation that do not cut off traffic, dig a pushing tow well on both wired sides and in well prefabricated box culvert, then by high-power jack group, box culvert is pushed under existing railway line.Both wired jacking bridge and culvert referred to culvert or the graded crossing (Subway Bridge) of passing through existing railway, adopted the bridges and culverts structure, also cried the box culvert jacking.The box culvert jacking can be divided into the jacking of case bridge and small-sized culvert pipe jacking, and wherein the case bridge of institute's jacking is generally single hole or porous box-shaped reinforced concrete frame structure, also claims frame bridge.The jacking of case bridge can be divided into single hole, porous and framework by the form of institute's jacking case bridge and three kinds of forms such as be combined with girder span, wherein the jacking of porous case bridge adopts continuous frame or single hole pin-connected panel, continuous frame is that the porous framework placing becomes overall structure to head into, and the single hole pin-connected panel is three or two adjacent single hole frameworks to be headed into by hole respectively and assembled.
Nowadays, both wired jacking bridge and culvert construction was used widely, mainly comprised following aspect: the first, at the existing bridge and culvert disease of the old line of processing, need to extend or increase and build new bridges and culverts; The second, the level crossing of existing railway and highway need to be reconstructed into grade separation; Three, tunnel need to be set up in the station that the passenger traffic volume is large; Four, field irrigation need to increase the overflow bridge culvert of building railroad crossing; Five, all kinds of roadbeds that fill and embankment.During practice of construction, both wired jacking bridge and culvert construction had following advantage: the first, short interference time to the transportation of existing railway circuit, do not cut off traffic, and can guarantee the normally operation under set speed limit of existing railway circuit; The second, can keep the roadbed of existing railway circuit intact and stable, reduce circuit and recover operation, for other bridges and culverts job practices, needn't build shoofly and meander line; Three, take up an area and remove less, can effectively reduce engineering on a large amount of earthwork and line; Four, box culvert precast construction integral body is good, and rigidity is large, is convenient to jacking construction, and anti-seismic performance is good; Five, base stress is little, substantially is not subject to the restriction of ground geological conditions, and the impact of climate condition is also less.The advantage of above-mentioned bridge pushing is only applicable to geology better and is the jacking construction of individual layer, minor structure thing, can not solve the works jacking construction problem of double-deck jacking and individual layer large-size, thereby when solving firm problem after double-deck jacking construction process finishes with jacking the impact of existing railway during the bridges and culverts jacking at the middle and upper levels and lower floor's bridges and culverts jacking on the problems such as impact of superstructure system, be badly in need of that design is a kind of passes through both wired double-deck jacking culvert construction technology.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned deficiency of the prior art, a kind of both wired double-deck jacking culvert construction technology of passing through is provided, its method step is simple, reasonable in design and the input construction cost is lower, result of use good, can be easy, fast and high-quality complete double-deck jacking and contain work progress, and work progress is safe and reliable.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind ofly pass through both wired double-deck jackings and contain construction technology, it is characterized in that: the double-deck jacking of constructing is contained for passing through both wired double-deck bridges and culverts, described double-deck bridges and culverts comprises the upper strata bridges and culverts and is positioned at the lower floor's bridges and culverts under the bridges and culverts of upper strata, described upper strata bridges and culverts is positioned at both wired belows of pass through, described upper strata bridges and culverts and lower floor's bridges and culverts are between reinforced concrete structure and the two and are integrated by concreting, and the left and right of described upper strata bridges and culverts is greater than the left and right of lower floor's bridges and culverts to length to length; This bilayer jacking is contained construction technology and is comprised the following steps:
Step 1, upper strata bridges and culverts are prefabricated: after having excavated the prefabricated pit one for prefabricated upper strata bridges and culverts, at the interior prefabricated upper strata of described prefabricated pit one bridges and culverts;
Back and the construction of rear back beam for step 2, upper strata bridges and culverts jacking: be used for the back one of jacking upper strata bridges and culverts in the interior construction of described prefabricated pit one, and after back one front side arranges back beam one; Described back one and rear back beam one all are arranged in the dead astern of the prefabricated upper strata bridges and culverts completed of step 1;
Step 3, both wired reinforcings: adopt the built on stilts ruggedized construction of circuit to both wired reinforcings of pass through;
Step 4, upper strata bridges and culverts jacking hole excavation: from front to back the hole of the jacking for jacking upper strata bridges and culverts one is excavated, described jacking hole one is positioned at the dead ahead of prefabricated pit described in step 1 one and itself and described prefabricated pit one and connects as one;
Step 5, upper strata bridges and culverts jacking: adopt jacking device by the prefabricated upper strata bridges and culverts completed in step 1 forward jacking to design attitude;
Step 6, the construction of upper strata bridges and culverts bottom support system: the bridges and culverts bottom, upper strata that jacking puts in place in step 5 arranges the bottom support system; Described bottom support system comprises many permanent support stakes that are supported on below, the bridges and culverts left and right sides, upper strata and is supported on many temporary support piles of below, bridges and culverts middle part, upper strata; Many described permanent support stakes of below, the bridges and culverts left and right sides, described upper strata form the permanent support system of upper strata bridges and culverts, and many described temporary support piles form the temporary supporting system of upper strata bridges and culverts;
Step 7, the built on stilts ruggedized construction of circuit are removed: the built on stilts ruggedized construction of circuit described in step 3 removed, and by both wired being supported in step 5 on the upper strata bridges and culverts that jacking puts in place of pass through;
Step 8, lower floor's bridges and culverts are prefabricated: after having excavated the prefabricated pit two for prefabricated lower floor bridges and culverts, at the interior prefabricated lower floor of described prefabricated pit two bridges and culverts;
Back and the construction of rear back beam for the bridges and culverts jacking of step 9, lower floor: be used for the back two of jacking lower floor bridges and culverts in the interior construction of described prefabricated pit two, and after back two front sides arrange back beam two; Described back two and rear back beam two all are arranged in the dead astern of the prefabricated lower floor's bridges and culverts completed of step 8;
Step 10, lower floor bridges and culverts jacking hole excavation: from front to back the hole of the jacking for jacking lower floor bridges and culverts two is excavated, described jacking hole two is positioned at the dead ahead of prefabricated pit described in step 9 two and itself and described prefabricated pit two and connects as one;
Step 11, lower floor's bridges and culverts jacking: adopt jacking device by the prefabricated lower floor's bridges and culverts completed in step 8 forward jacking to design attitude; Described lower floor bridges and culverts in jack-in process, is removed the system of temporary supporting described in step 6 to front by rear forward;
Step 12, concreting: after the bridges and culverts jacking of lower floor described in step 11 puts in place, concreting between upper strata bridges and culverts and lower floor's bridges and culverts, make upper strata bridges and culverts and lower floor's bridges and culverts be fastenedly connected and be integrated.
Above-mentioned a kind of both wired double-deck jacking culvert construction technology of passing through, it is characterized in that: in step 1, the upper strata bridges and culverts is carried out in prefabricated and step 8, lower floor's bridges and culverts being carried out in prefabricated process, prefabricated upper strata bridges and culverts and lower floor's bridges and culverts forming panel used are carried out Zhi Li or while removing, all adopt the formwork hoisting device to be lifted described forming panel; Described forming panel is formed by the polylith template splicing, and described upper strata bridges and culverts and lower floor's bridges and culverts are needs prefabricated bridges and culverts;
Described formwork hoisting device comprises the vertical supporting framework, be arranged on slipway beam on the vertical supporting framework, be arranged on slipway beam and can carry out the sliding component of horizontal shifting and be arranged on the template lifting means of described sliding component below along slipway beam, and described vertical supporting framework is laid in the surrounding outside of the prefabricated bridges and culverts of described need; Described slipway beam is level to laying.
Above-mentioned a kind of both wired double-deck jacking culvert construction technology of passing through, it is characterized in that: described lower floor bridges and culverts is divided into three bridges and culverts sections from left to right, and three described bridges and culverts sections are respectively left side sections, middle part sections and right side sections from left to right; In step 8 during prefabricated lower floor bridges and culverts, to described left side sections, middle part sections and right side sections, carry out respectively prefabricated, prefabricated described left side sections, middle part sections and right side sections are laid on same straight line, and described left side sections and described right side sections lay respectively at the left and right sides of described middle part sections; While carrying out lower floor's bridges and culverts jacking in step 11, first the sections jacking of described middle part is put in place, then the sections jacking of described left side is put in place, finally the sections jacking of described right side is put in place.
Above-mentioned a kind of both wired double-deck jacking culvert construction technology of passing through, it is characterized in that: in step 12 between upper strata bridges and culverts and lower floor's bridges and culverts during concreting, build from the bottom to top layer brick by laying bricks or stones between the lower floor's bridges and culverts first put in place in jacking and the upper strata bridges and culverts of the side of being located thereon, afterwards concreting corresponding formation concrete articulamentum also between upper strata bridges and culverts and lower floor's bridges and culverts again; In step 12, between upper strata bridges and culverts and lower floor's bridges and culverts during concreting, the left and right sides of lower floor's bridges and culverts that also need put in place in jacking is concreting form the concrete side barricade respectively.
Above-mentioned a kind of both wired double-deck jacking culvert construction technology of passing through, it is characterized in that: described upper strata bridges and culverts is lattice girder, described lower floor bridges and culverts is frame bridge.
Above-mentionedly a kind ofly pass through both wired double-deck jackings and contain construction technology, it is characterized in that: the steel pipe scaffold that described vertical supporting framework is the reinforcing cage for the prefabricated bridges and culverts of the described need of colligation set up in advance.
Above-mentioned a kind of both wired double-deck jacking culvert construction technology of passing through, is characterized in that: on described template lifting means, be equipped with for lifting the suspension hook of template; Described template lifting means is electric hoist equipment, and described formwork hoisting device also comprises the on-off controller that described electric hoist equipment is carried out to switch control, and described on-off controller and described electric hoist equipment join; The pulley that described sliding component comprises link and is arranged on link top and can in slipway beam, carries out the front and back slippage, described template lifting means is arranged on described link bottom; Described slipway beam is i iron.
Above-mentioned a kind of both wired double-deck jacking culvert construction technology of passing through, it is characterized in that: both wired quantity of passing through is many, many described both wired acceptances of the bid high minimum both wired be that low level is both wired, high both wired for just the beam reinforcing is both wired than more than the described low level both wired high 50cm of absolute altitude of many described both wired acceptances of the bid;
The built on stilts ruggedized construction of circuit described in step 3 comprises beam stiffening frame in length and breadth and the lower support structure that the described stiffening frame of beam is in length and breadth supported, and described lower support structure comprises a plurality of vertical buttress below the left and right sides that is supported on respectively the described stiffening frame of beam in length and breadth and front side; The described stiffening frame of beam in length and breadth is rectangular frame, and the left and right of described rectangular frame is greater than left and right from the upper strata bridges and culverts to length is greater than the front and back of upper strata bridges and culverts to width to length and its front and back to width; The described stiffening frame of beam in length and breadth comprises that multiple tracks is laid from left to right horizontally lifts beam and multiple tracks is laid in the described horizontal longitudinal reinforcement beam of lifting the beam top of multiple tracks from front to back, multiple tracks is described horizontally lifts that beam is parallel laying and it is laid on same level, and the described longitudinal reinforcement beam of per pass all is fastenedly connected and is integrated with the described horizontal beam of lifting of multiple tracks; The described horizontal beam of lifting of multiple tracks forms many described both wired support platforms that supported; The described longitudinal reinforcement beam of multiple tracks is parallel laying and it is laid on same level, and described longitudinal reinforcement beam is vertical laying with the horizontal beam of lifting; The described horizontal length direction of lifting beam and upper strata bridges and culverts are parallel laying with the jacking direction of lower floor's bridges and culverts;
Be provided with on described support platform described just beam is both reinforced to just beam of wired D type of being reinforced, described just beam reinforce both wired by the D type just beam be supported on described support platform, described D type just beam and longitudinal reinforcement beam be parallel laying and its quantity and many described both wired in just the beam reinforcing both wired quantity was identical; Many except described just beam is reinforced, each both wired is both wired all to be supported on described support platform by insulating pad in described both wired.
Above-mentioned a kind of both wired double-deck jacking culvert construction technology of passing through, it is characterized in that: while adopting the built on stilts ruggedized construction of circuit to wired reinforcing of both pass through in step 3, first adopt the D type just beam described just beam is reinforced to both wired reinforcings, and by described D type just the beam temporary supporting on described lower support structure; Afterwards, wear the horizontal beam of lifting of multiple tracks be positioned at directly over the bridges and culverts design attitude of upper strata on described lower support structure, and the horizontal beam of lifting worn is installed on described lower support structure, to horizontal when lifting beam and installed by the D type just the longeron of beam be fastenedly connected and be integrated with the mounted horizontal beam of lifting; Then, the described longitudinal reinforcement beam of multiple tracks is worn, and the described longitudinal reinforcement beam of multiple tracks and the mounted horizontal beam of lifting are fastenedly connected and are integrated; Finally, the horizontal beam of lifting of residue in the described stiffening frame of beam is in length and breadth worn.
Above-mentioned a kind of both wired double-deck jacking culvert construction technology of passing through, it is characterized in that: described lower support structure also comprises the many vertical supporting stakes that are supported on respectively the described stiffening frame of beam in length and breadth below; From front to back described jacking hole one is carried out in digging process in step 4, the vertical supporting stake that is supported on below, the described stiffening frame of beam in length and breadth middle part is removed to front by rear; It is a plurality of concrete crossties of laying from front to back that described just beam is reinforced both wired sleeper, between adjacent two the described concrete crossties in front and back, is provided with steel sleeper one, and the two ends, left and right of described steel sleeper are the fastening D type that is arranged on just on the twice longeron of beam respectively.
The present invention compared with prior art has the following advantages:
1, method step is simple, reasonable in design and to drop into construction cost lower.
2, fast and construction period of speed of application is easy to guarantee.
3, propose a kind of simple and construction quality and be easy to the double-deck bridges and culverts jacking construction method guaranteed, creatively propose that a whole bridges and culverts is divided into to upper and lower two-layer bridges and culverts and carry out respectively jacking, and jacking completes the new large span bridges and culverts jacking construction method connected as one again.Simultaneously, the present invention utilizes rational Program for structural Transformation to existing works of having constructed, has greatly strengthened safety and the economy of double-deck jacking.
4, safe and reliable, efficient, steady and flexible operation, solved the construction difficult problem of double-deck jacking, for double-deck jacking technology in future field provides the experience platform.When the firm problem after in the time of simultaneously, effectively solving double bridge and contain the upper strata bridges and culverts jacking existed in jacking construction, the impact of existing railway and jacking being finished and lower floor's bridges and culverts jacking on the problems such as impact of superstructure system.
5, the line frame hollow structure adopted is reasonable in design, easy accessibility and result of use good, can firmly reinforce passed through multiple tracks is both wired, and can meet both wired synchronous reinforcing demands of many different levels.Reinforce both wired employings " the D type is beam and steel sleeper just " for just beam and jointly form independent built on stilts system, then by " the empty method of roof beam structure in length and breadth ", four station tracks are formed to a complete stress system, bear all loads in railway top.Thereby, the firm problem after in the time of effectively solving double bridge and contain the upper strata bridges and culverts jacking existed in jacking construction, the impact of existing railway and jacking being finished.
6, the formwork hoisting apparatus structure adopted is simple, reasonable in design, processing and fabricating and easy accessibility and input cost lower, mainly by vertical supporting framework, slipway beam (being the i iron slideway) and template lifting means, formed, during practice of construction, only the i iron slideway need be installed on the vertical supporting framework of having set up, and the small-sized template lifting means of installation gets final product on the i iron slideway.And, use easy and simple to handlely, after adopting template lifting means lifting template, only need manually sliding component is moved to and wants assembled template position place together with the template lifting means, just can automatically complete afterwards the installation process of template.In addition, be provided with on-off controller the template lifting means is carried out on off control, can be with stopping with use, operation is very easy in use.Simultaneously, this hanging apparatus occupied ground is little, utilizes the reinforcing cage colligation to carry out formwork hoisting with scaffold, can effectively solve the normal difficult problems of using of the large-scale formwork hoisting equipment of restriction such as construction plant, line operated safe construction.In addition, this hanging apparatus result of use is good and practical value is high, can not only reduce construction cost, and easy accessibility, can effectively shorten the prefabricated construction duration of framework bridge, and has greatly strengthened working security, economy and the feature of environmental protection.Utilize small-sized template lifting means to install and stripping, effectively solve construction plant and a Business Line construction restriction difficult problem, overcome existing large-scale formwork hoisting equipment be only applicable to the construction plant scope greatly, near the construction restriction of line operated, thereby this formwork hoisting device goes for the frame bridge culvert construction of limited, the close operation railway line in construction plant and complicated structure, can not only increase construction speed, shorten the construction period, increase working security, can also reduce construction cost, improve Environmental Protection Level.To sum up, this hanging apparatus has the place of saving, reduces costs, increases construction speed, shortens the construction period and have the advantages that to increase considerably working security, economy, applicability, the feature of environmental protection and popularity, can effectively be suitable for to bridges and culverts forming panel dismounting work progress, can also be lifted construction materials such as reinforcing bar, steel pipes.
7, applied widely, be applicable to the jacking of large-span double-layer bridges and culverts or individual layer bridge pushing.Double-deck bridge pushing advantage for large span is more obvious.
In sum, the inventive method step is simple, reasonable in design and drop into that construction cost is lower, result of use good, in the time of effectively solving the upper strata bridges and culverts jacking existed in double-deck jacking construction process during on the firm problem after the impact of existing railway and jacking end and lower floor's bridges and culverts jacking on the problems such as impact of superstructure system.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
The accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention.
Fig. 2 is the present invention's structural representation that double-deck jacking contains of constructing.
The structural representation that Fig. 3 is formwork hoisting device of the present invention.
The jacking view that Fig. 4 is upper strata of the present invention bridges and culverts.
The jacking view that Fig. 5 is lower floor of the present invention bridges and culverts.
Fig. 6 is the structural representation of jacking construction of the present invention by back and rear back beam.
The structural representation that Fig. 7 is the built on stilts ruggedized construction of circuit of the present invention.
The right view that Fig. 8 is Fig. 7.
Fig. 9 be the present invention just beam reinforce the just connection status schematic diagram of beam of both wired steel sleeper and D type.
Figure 10 is the horizontal connection status schematic diagram of lifting between beam and longitudinal reinforcement beam in the built on stilts ruggedized construction of circuit of the present invention.
The left view that Figure 11 is Figure 10.
The structural representation that Figure 12 is concrete articulamentum of the present invention and concrete side barricade.
The structural representation that Figure 13 is bottom support system of the present invention.
Description of reference numerals:
The specific embodiment
As shown in Figure 1 a kind of passes through both wired double-deck jacking contains construction technology, the double-deck jacking of constructing is contained for passing through both wired double-deck bridges and culverts, described double-deck bridges and culverts comprises upper strata bridges and culverts 1 and is positioned at the lower floor's bridges and culverts 2 under upper strata bridges and culverts 1, described upper strata bridges and culverts 1 is positioned at both wired belows of pass through, described upper strata bridges and culverts 1 and lower floor's bridges and culverts 2 are between reinforced concrete structure and the two and are integrated by concreting, Fig. 2, to length, is referred in the left and right that the left and right of described upper strata bridges and culverts 1 is greater than lower floor's bridges and culverts 2 to length; This bilayer jacking is contained construction technology and is comprised the following steps:
Step 1, upper strata bridges and culverts are prefabricated: after having excavated the prefabricated pit one for prefabricated upper strata bridges and culverts 1, at the interior prefabricated upper strata of described prefabricated pit one bridges and culverts 1.
During practice of construction, the center line of the prefabricated upper strata bridges and culverts 1 completed is consistent with the design centre line of upper strata bridges and culverts 1.
In the present embodiment, in step 1, the prefabricated upper strata bridges and culverts 1 completed is positioned at the design attitude dead astern of upper strata bridges and culverts 1.
Back and the construction of rear back beam for step 2, upper strata bridges and culverts jacking: be used for back one 3-1 of jacking upper strata bridges and culverts 1 in the interior construction of described prefabricated pit one, and after back one 3-1 front side arranges back beam one 4-1; Described back one 3-1 and rear back beam one 4-1 all are arranged in the dead astern of the prefabricated upper strata bridges and culverts 1 completed of step 1.
Step 3, both wired reinforcings: adopt the built on stilts ruggedized construction of circuit to both wired reinforcings of pass through.
Step 4, upper strata bridges and culverts jacking hole excavation: from front to back the hole of the jacking for jacking upper strata bridges and culverts 1 one is excavated, described jacking hole one is positioned at the dead ahead of prefabricated pit described in step 1 one and itself and described prefabricated pit one and connects as one.
Step 5, upper strata bridges and culverts jacking: adopt jacking device by the prefabricated upper strata bridges and culverts 1 completed in step 1 forward jacking to design attitude, refer to Fig. 4.
Step 6, the construction of upper strata bridges and culverts bottom support system: upper strata bridges and culverts 1 bottom that jacking puts in place in step 5 arranges the bottom support system; Described bottom support system comprises many permanent support stake 5-1 that are supported on upper strata bridges and culverts 1 below, the left and right sides and many temporary support pile 5-2 that are supported on upper strata bridges and culverts 1 below, middle part; Many described permanent support stake 5-1 of described upper strata bridges and culverts 1 below, the left and right sides form the permanent support system of upper strata bridges and culverts 1, and many described temporary support pile 5-2 form the temporary supporting system of upper strata bridges and culverts 1, refer to Figure 13.
Step 7, the built on stilts ruggedized construction of circuit are removed: the built on stilts ruggedized construction of circuit described in step 3 removed, and by both wired being supported in step 5 on the upper strata bridges and culverts 1 that jacking puts in place of pass through.
Step 8, lower floor's bridges and culverts are prefabricated: after having excavated the prefabricated pit two for prefabricated lower floor bridges and culverts 2, at the interior prefabricated lower floor of described prefabricated pit two bridges and culverts 2.
In the present embodiment, the center line of the prefabricated lower floor's bridges and culverts 2 completed is consistent with the design centre line of lower floor bridges and culverts 2.
Back and the construction of rear back beam for the bridges and culverts jacking of step 9, lower floor: be used for back two 3-2 of jacking lower floor bridges and culverts 2 in the interior construction of described prefabricated pit two, and after back two 3-2 front sides arrange back beam two 4-2; Described back two 3-2 and rear back beam two 4-2 all are arranged in the dead astern of the prefabricated lower floor's bridges and culverts 2 completed of step 8.
Step 10, lower floor bridges and culverts jacking hole excavation: from front to back the hole of the jacking for jacking lower floor bridges and culverts 2 two is excavated, described jacking hole two is positioned at the dead ahead of prefabricated pit described in step 9 two and itself and described prefabricated pit two and connects as one.
Step 11, lower floor's bridges and culverts jacking: adopt jacking device by the prefabricated lower floor's bridges and culverts 2 completed in step 8 forward jacking to design attitude, refer to Fig. 5.Described lower floor bridges and culverts 2 in jack-in process, is removed the system of temporary supporting described in step 6 to front by rear forward.
Step 12, concreting: after bridges and culverts 2 jackings of lower floor described in step 11 put in place, concreting between upper strata bridges and culverts 1 and lower floor's bridges and culverts 2, make upper strata bridges and culverts 1 and lower floor's bridges and culverts 2 be fastenedly connected and be integrated.
As shown in Figure 2, in the present embodiment, described upper strata bridges and culverts 1 is lattice girder, and described lower floor bridges and culverts 2 is frame bridge.
In actual use procedure, the purposes of upper strata lattice girder is embodied in following two aspects: 1. for lower floor's frame bridge jacking, create the jacking environment, guarantee the stressed support system of lower floor's frame bridge jacking, the multiple load that the balance railway operation produces; 2. meet local villager current convenient, become local transit passage and contain, guarantee that various tractor-ploughing plant equipment etc. pass through.The purposes of lower floor's frame bridge is embodied in following two aspects: 1. by concreting and upper strata lattice girder, connect to as a whole, the common stressed support system as supporting the multiple load that railway operation produces; 2. cross aquaporin as project of South-to-North water diversion, guarantee the smooth water flowing of project of South-to-North water diversion.
During practice of construction, described upper strata bridges and culverts 1 and lower floor's bridges and culverts 2 can be also the concrete structure bridges and culverts of other type.
In the present embodiment, described lower floor bridges and culverts 2 is divided into three bridges and culverts sections from left to right, and three described bridges and culverts sections are respectively left side sections, middle part sections and right side sections from left to right; In step 8 during prefabricated lower floor bridges and culverts 2, to described left side sections, middle part sections and right side sections, carry out respectively prefabricated, prefabricated described left side sections, middle part sections and right side sections are laid on same straight line, and described left side sections and described right side sections lay respectively at the left and right sides of described middle part sections; While carrying out lower floor's bridges and culverts jacking in step 11, first the sections jacking of described middle part is put in place, then the sections jacking of described left side is put in place, finally the sections jacking of described right side is put in place.
In the present embodiment, described upper strata bridges and culverts 1 is continuous lattice girder, and described continuous lattice girder is 6 hole lattice girders, single hole headroom size 8m * 7.2m, and sidewall thickness is 0.6m, the overall dimensions of described upper strata bridges and culverts 1 is 52.2m * 35m * 8.5m.Described lower floor bridges and culverts 2 is the separate type frame bridge, and lower floor's bridges and culverts 2 is three hole frame bridges, is respectively from left to right left side lateral opening (i.e. left side sections), mesopore (sections) and right side lateral opening (being the right side sections).Described lower floor bridges and culverts 2 is divided into from front to back 5 and builds joint, be respectively the cast-in-place joint of 23.44m, 23m jacking joint, the cast-in-place joint of 2m, 23m jacking joint and the cast-in-place joint of 23.44m, described lower floor bridges and culverts 2 overall dimensions along the jacking direction are 34m * 95m * 11.6m, and the single hole width of described lower floor bridges and culverts 2 is 9m.
That is to say, described lower floor bridges and culverts 2 adopts " relaying top method " divide the hole jacking, first carries out mesopore, after making temporary support pile 5-2 bottom mesopore and described upper strata lattice girder form whole integral framework, carry out jacking to left side is lateral opening again, carry out jacking to right side is lateral opening more subsequently; And the space that keeps maintaining between lower floor's bridges and culverts 2 and upper strata lattice girder 35cm.
During practice of construction, in step 1, upper strata bridges and culverts 1 is carried out in prefabricated and step 8 lower floor's bridges and culverts 2 is carried out when prefabricated, all first base plate being built, reach 75% when above of design strength until described base plate strength, then abutment wall and top board are built.
In the present embodiment, in step 1, upper strata bridges and culverts 1 is carried out when prefabricated, first according to measuring the unwrapping wire result, the baseplate reinforcing bar of colligation upper strata bridges and culverts 1, prop up afterwards the forming panel of the base plate of vertical upper strata bridges and culverts 1, and build underplate concrete, after completing, concreting carries out maintenance and when concrete strength reaches 75%; Then, the abutment wall of colligation upper strata bridges and culverts 1 and top board reinforcing bar, then prop up internal mold and the limit mould that founds upper strata bridges and culverts 1, contain 1 abutment wall and concrete roof with the after-pouring upper layer bridge, last form removal maintenance.
That is to say, the concrete of described upper strata bridges and culverts 1 is pouring construction at twice.Wherein, build for the first time to base plate and the above 30cm of base plate chamfering position, when concrete strength reaches 75%, start successively afterwards to carry out that full hall scaffold is set up, colligation abutment wall reinforcing bar, a stile wall form, build the operations such as abutment wall and concrete roof, adopt a dabbing joint treatment before connecing stubble between new-old concrete.
While building the underplate concrete of upper strata bridges and culverts 1, placing pick place, top pre-embedded steel slab, base plate uniform stressed while guaranteeing jacking; And establish 5%~10% fore slope at the front end of upper strata bridges and culverts 1, and in order to will exceed the upper strata bridges and culverts soil compaction at 1 end during jacking, increase bearing capacity, be convenient in jack-in process adopt other corresponding measure.In the present embodiment, the concrete of building described upper strata bridges and culverts 1 is impervious high-strength concrete, thereby will carry out waterproofing work to abutment wall and the top board of upper strata bridges and culverts 1 by designing requirement before jacking.After the intensity of described upper strata bridges and culverts 1 reaches 100%, remove all templates and scaffold, and carry out top board and the abutment wall waterproofing work of upper layer bridge culvert 1, carry out back simultaneously and apply, until all after prefabricated completing, carrying out jacking construction.
In the present embodiment, when carrying out upper strata bridges and culverts jacking in step 2 and construct with rear back beam with back, abutment wall and the top board of upper strata bridges and culverts 1 carried out to waterproofing work.
In step 8, lower floor's bridges and culverts 2 is carried out when prefabricated, the prefabricated process of described lower floor bridges and culverts 2 is identical with the prefabricated process of upper strata bridges and culverts 1.Lower floor's bridges and culverts 2 is carried out when prefabricated, first according to measuring the unwrapping wire result, the baseplate reinforcing bar of colligation lower floor bridges and culverts 2, prop up the forming panel of the base plate of making layer bridges and culverts 2 afterwards, and build underplate concrete, after completing, concreting carries out maintenance and when concrete strength reaches 75%; Then, the abutment wall of colligation lower floor bridges and culverts 2 and top board reinforcing bar, then prop up internal mold and the limit mould of making layer bridges and culverts 2, and with abutment wall and the concrete roof of after-pouring lower floor bridges and culverts 2, last form removal maintenance.
In the present embodiment, when carrying out lower floor bridges and culverts jacking in step 9 and constructing with rear back beam with back, abutment wall and the top board of lower floor's bridges and culverts 2 carried out to waterproofing work.
In the present embodiment, lower floor's bridges and culverts 2 is carried out when prefabricated, the forming panel adopted is combined steel, and the monolithic steel form is of a size of 1.2m * 1.5m.Described frame bridge face wall directly and the end-blocking model adopts assembled steel form, inboard four inclination corners and end head formwork also all adopt the steel angle mould, will carry out the internal mold piecemeal before construction arranges, the special-shaped template of the corresponding position numbering of need annotating, assembled and built rear concrete presentation quality smoothly to guarantee template.
As shown in Figure 3, in step 1, upper strata bridges and culverts 1 is carried out in prefabricated and step 8, lower floor's bridges and culverts 2 being carried out in prefabricated process, when forming panel used carries out Zhi Li or dismounting to prefabricated upper strata bridges and culverts 1 and lower floor's bridges and culverts 2, all adopt the formwork hoisting device to be lifted described forming panel.Described forming panel is formed by the polylith template splicing, and described upper strata bridges and culverts 1 and lower floor's bridges and culverts 2 are needs prefabricated bridges and culverts.
Described formwork hoisting device comprises vertical supporting framework 9-1, be arranged on slipway beam 9-2 on vertical supporting framework 9-1, to be arranged on slipway beam 9-2 upper and can carry out the sliding component of horizontal shifting and be arranged on the template lifting means 9-3 of described sliding component below along slipway beam 9-2.Described slipway beam 9-2 is level to laying.Described vertical supporting framework 9-1 is laid in the surrounding outside of the prefabricated bridges and culverts of described need.
During practice of construction, described vertical supporting framework 9-1 is formed by connecting by a plurality of vertical plane supports that are laid in respectively the surrounding outside of the prefabricated bridges and culverts of described need.In the present embodiment, described vertical plane support comprises many vertical steel pipe 9-4 that are laid on same vertical plane, and a plurality of described vertical plane supports connect as one by many horizontal steel pipe 9-5.
In the present embodiment, the steel pipe scaffold that described vertical supporting framework 9-1 is the reinforcing cage for the prefabricated bridges and culverts of the described need of colligation set up in advance.
In the present embodiment, the pulley 9-6 that described sliding component comprises link 9-7 and is arranged on link 9-7 top and can in slipway beam 9-2, carries out the front and back slippage, described template lifting means 9-3 is arranged on described link 9-7 bottom.
In the present embodiment, described pulley 9-6 is bearing, and described link 9-7 top correspondence is provided with the installation shaft of installing for described bearing.
During actual the use, described pulley 9-6 also can adopt the slippage wheel of other type.
The quantity of described pulley 9-6 is a plurality of, and a plurality of described pulley 9-6 lay at grade.In the present embodiment, the quantity of described pulley 9-6 is two.During actual the use, can be according to specific needs, the quantity of described pulley 9-6 is adjusted accordingly.
In the present embodiment, described template lifting means 9-3 is electric hoist equipment, and described formwork hoisting device also comprises the on-off controller 9-9 that described electric hoist equipment is carried out to switch control, and described on-off controller 9-9 and described electric hoist equipment join.
In the present embodiment, described template lifting means 9-3 is single-phase hoisting machine.And described single-phase hoisting machine is KDJ-400 single-phase multifunctional elevator, its hoisting depth need meet the formwork hoisting demand.
In the present embodiment, described slipway beam 9-2 is i iron.
Actually add man-hour, described slipway beam 9-2 is spliced by a plurality of slipway beam sections.Be fastenedly connected by junction steel plate 9-10 between adjacent two described slipway beam sections, be fastenedly connected by connecting bolt 9-11 between described junction steel plate 9-10 and described slipway beam sections.In the present embodiment, described slipway beam 9-2 is the I12 i iron, and the thickness of slab of described junction steel plate 9-10 is 5mm, and the quantity of described connecting bolt 9-11 is a plurality of, and the shank of bolt diameter of connecting bolt 9-11 is Φ 12mm.
In the present embodiment, described link 9-7 is welded by plurality of steel plates.
In the present embodiment, on described template lifting means 9-3, be equipped with for lifting the suspension hook 9-8 of template.And, described suspension hook 9-8 by wire rope hanging on template lifting means 9-3.
In conjunction with Fig. 4 and Fig. 5, during practice of construction, after has excavated in the hole of jacking described in step 4 one and before carrying out upper strata bridges and culverts jacking in step 5, slide plate system one 10-1 also need mat formation in described jacking hole one; Similarly, after has excavated in the hole of jacking described in step 10 two and before carrying out lower floor's bridges and culverts jacking in step 11, slide plate system two 10-2 also need mat formation in described jacking hole one.In the present embodiment, described slide plate system one 10-1 is identical with the structure of described slide plate system two 10-2.
Described slide plate system one 10-1 and described slide plate system two 10-2 include crushed rock base course, be laid in concrete slide plate on described crushed rock base course, be laid in horizontal mortar levelling layer on described concrete slide plate, the paraffin lubrication oil coating of brushing on described horizontal mortar levelling layer and be laid in the plastic sheeting on described paraffin lubrication oil coating.
After in step 1, upper strata bridges and culverts 1 being carried out in prefabricated and step 8 lower floor's bridges and culverts 2 is carried out to prefabricated completing, according to design jacking direction, Measurement accuracy unwrapping wire on slide plate system one 10-1 and described slide plate system two 10-2 respectively, simultaneously the setting party is to controlling stake and high process control stake, guarantee jack-in process at the middle and upper levels bridges and culverts 1 and center line, slide plate system one 10-1 and described slide plate system two 10-2 of lower floor bridges and culverts 2 center line respectively with and the design centre line of upper strata bridges and culverts 1 and lower floor's bridges and culverts 2 consistent.
In the present embodiment, described in one 3-1 of back described in step 2 and step 9, the structure of back two 3-2 is all identical, and after described in rear back beam one 4-1 described in step 2 and step 9, the structure of back beam two 4-2 is all identical.
As shown in Figure 6, described back one 3-1 and back two 3-2 include by mortar flag stone and build the back 11-1 formed and the back fill stratum 11-2 that is laid in described back 11-1 rear side by laying bricks or stones, the cross section of described back 11-1 is right-angled trapezium, and the front side wall of described back 11-1 is upright side walls.Described rear back beam one 4-1 and rear back beam two 4-2 all serve as reasons and are laid in multiple tracks on back 11-1 front side wall and are the rear back beam 11-3 vertically formed to the i iron of laying, and the described i iron of multiple tracks is laid on same vertical plane.The front portion of described rear back beam 11-3 is provided with steel bar concrete distribution beam 11-4, and described jacking device props up and withstands on described steel bar concrete distribution beam 11-4.
As shown in Figure 7, Figure 8, both wired quantity of passing through is many, many described both wired acceptances of the bid high minimum both wired be that low level is both wired, high both wired for just the beam reinforcing is both wired than more than the described low level both wired high 50cm of absolute altitude of many described both wired acceptances of the bid.
The built on stilts ruggedized construction of circuit described in step 3 comprises beam stiffening frame in length and breadth and the lower support structure that the described stiffening frame of beam is in length and breadth supported, and described lower support structure comprises a plurality of vertical buttress 7-8 below the left and right sides that is supported on respectively the described stiffening frame of beam in length and breadth and front side.The described stiffening frame of beam in length and breadth is rectangular frame, and the left and right of described rectangular frame is greater than left and right from upper strata bridges and culverts 1 to length is greater than the front and back of upper strata bridges and culverts 1 to width to length and its front and back to width.The described stiffening frame of beam in length and breadth comprises that multiple tracks is laid from left to right horizontally lifts beam 7-1 and multiple tracks is laid in the described horizontal longitudinal reinforcement beam 7-2 that lifts beam 7-1 top of multiple tracks from front to back, multiple tracks is described horizontally lifts that beam 7-1 is parallel laying and it is laid on same level, and the described longitudinal reinforcement beam of per pass 7-2 all is fastenedly connected and is integrated with the described horizontal beam 7-1 that lifts of multiple tracks.The described horizontal beam 7-1 that lifts of multiple tracks forms many described both wired support platforms that supported.The described longitudinal reinforcement beam of multiple tracks 7-2 is parallel laying and it is laid on same level, and described longitudinal reinforcement beam 7-2 is vertical laying with the horizontal beam 7-1 that lifts; Described horizontal beam 7-1 and the upper strata bridges and culverts 1 lifted is parallel laying with the jacking direction of lower floor bridges and culverts 2.
Be provided with on described support platform described just beam is both reinforced to just beam 7-4 of wired D type of being reinforced, described just beam reinforce both wired by the D type just beam 7-4 be supported on described support platform, described D type just beam 7-4 and longitudinal reinforcement beam 7-2 be parallel laying and its quantity and many described both wired in just the beam reinforcing both wired quantity was identical; Many except described just beam is reinforced, each both wired is both wired all to be supported on described support platform by insulating pad in described both wired.
In the present embodiment, institute passes through both wired to be four, to be respectively burnt willow uplink, burnt Liuxia's line, shunting neck and coal special line, four a both wired wired 12-1, both wired two 12-2, both wired three 12-3 and both wired four 12-4 of both being denoted as respectively.Wherein, burnt willow uplink, burnt Liuxia's line are state-owned busy trunk railway, speed per hour 120km/h, and four both the relative elevation of wired (i.e. four station tracks) there are differences, the absolute altitude of burnt willow uplink is minimum, and the absolute altitude of burnt willow uplink and burnt Liuxia's line differs 12cm, and the absolute altitude of burnt willow uplink and shunting neck differs 11cm, the absolute altitude of burnt willow uplink and coal special line differs 96cm, and this just requires the empty reinforcing process of line frame need strengthen stringency and safety.
In the present embodiment, the built on stilts ruggedized construction of described circuit adopts " beam reinforcing method in length and breadth ", and the left and right of the described stiffening frame of beam in length and breadth is 86m to total length.
During practice of construction, multiple tracks is described horizontally lifts beam 7-1 and the described longitudinal reinforcement beam of multiple tracks 7-2 is the shaped steel rod member.In the present embodiment, described longitudinal reinforcement beam 7-2 and the horizontal beam 7-1 that lifts are i iron.During actual the use, described longitudinal reinforcement beam 7-2 and horizontally lift the shaped steel rod member that beam 7-1 also can adopt other type.
In the present embodiment, described lower support structure also comprises the many vertical supporting stake 7-3 that are supported on respectively the described stiffening frame of beam in length and breadth below.From front to back described jacking hole one is carried out in digging process in step 4, the vertical supporting stake 7-3 that is supported on below, the described stiffening frame of beam in length and breadth middle part is removed to front by rear.
Many described vertical supporting stake 7-3 divide M row N row to be laid, and wherein M and N are positive integer, M >=3 and N >=3.Also comprise on the described stiffening frame of beam in length and breadth that multiple tracks laterally encrypts beam 7-7, the described horizontal encryption beam 7-7 of multiple tracks all is parallel laying with the horizontal beam 7-1 that lifts, and the described horizontal encryption beam 7-7 of multiple tracks and the described horizontal beam 7-1 that lifts of multiple tracks are laid on same level.The described horizontal encryption beam 7-7 of per pass all is fastenedly connected and is integrated with the described longitudinal reinforcement beam of multiple tracks 7-2.The top of many described vertical supporting stake 7-3 all is fixed on horizontal encryption beam 7-7.
In the present embodiment, described horizontal encryption beam 7-7 is i iron.And, laterally encrypt beam 7-7 and be specially the I56b i iron, it is 5 roads that described longitudinal reinforcement beam 7-2 specifically adopts the quantity of Two bors d's oeuveres I100 i iron and described longitudinal reinforcement beam 7-2, and the length of described I100 i iron is 8m or 10m, between two described I100 i iron, by junction plate, connects as one.The described horizontal beam 7-1 that lifts is specially the I56b i iron.
In the present embodiment, between the described horizontal encryption beam 7-7 of adjacent twice, also be laid with H588 shaped steel one, and the H588 shaped steel of laying is parallel laying with the horizontal beam 7-7 that encrypts.
During practice of construction, by described horizontal lift beam 7-1 horizontal lift pass through both wired rail at the bottom of, describedly horizontally lift beam 7-1 and the pad that passes through between both wired rail is equipped with insulating pad, thereby can effectively avoid in work progress directly contacting with rail, and can effectively prevent from joining electricity and " red band " occur.
In the present embodiment, adjacent two described horizontal spacings of lifting between beam 7-1 are 0.6m.During practice of construction, can according to specific needs, adjacent two described horizontal spacings of lifting between beam 7-1 be adjusted accordingly.
In the present embodiment, a plurality of vertical buttress 7-8 that is supported on below, the described stiffening frame of beam in length and breadth front side moves stake for resisting, and described resisting moved stake for hand excavated pile.Because burnt willow uplink is positioned at front side, thereby burnt willow uplink and anti-moving between stake arrange cross binding, drives circuit while preventing the jacking of case bridge.
In the present embodiment, the described anti-cross section that moves stake is square and its cross sectional dimensions is 1.3m * 1.3m.
In conjunction with Figure 10 and Figure 11, described longitudinal reinforcement beam 7-2 and horizontal lifting between beam 7-1 are fastenedly connected by a plurality of U bolt 7-5.In the present embodiment, described U bolt 7-5 is set with the horizontal beam 7-1 outside of lifting from the bottom to top, described longitudinal reinforcement beam 7-2 top is provided with twice for the installed part of U bolt 7-5 is installed, described installed part is vertical laying with longitudinal reinforcement beam 7-2, has the bolt mounting holes of installing for U bolt 7-5 on described installed part.
In the present embodiment, described installed part is angle steel 7-6.Described angle steel 7-6 is weldingly fixed on longitudinal reinforcement beam 7-2.During practice of construction, described installed part also can adopt the shaped steel rod member of other type.
In the present embodiment, described longitudinal reinforcement beam 7-2 with horizontal lift beam 7-1 and be connected after, the fair line road direction of passing through between both wired rail that also need be adjacent at the described longitudinal reinforcement beam of multiple tracks 7-2 is established wood every 1.5m and is supported together, guarantees line direction.
In the present embodiment, many described vertical supporting stake 7-3 are hand excavated pile.Described vertical buttress 7-8 is concrete buttress.
In the present embodiment, while adopting the built on stilts ruggedized construction of circuit to wired reinforcing of both pass through in step 3, first adopt the D type just beam 7-4 described just beam is reinforced to both wired reinforcings, and by described D type just beam 7-4 temporary supporting on described lower support structure; Afterwards, wear the horizontal beam 7-1 that lifts of multiple tracks be positioned at directly over upper strata bridges and culverts 1 design attitude on described lower support structure, and the horizontal beam 7-1 that lifts worn is installed on described lower support structure, to horizontal when lifting beam 7-1 and installed by the D type just the longeron of beam 7-4 be fastenedly connected and be integrated with the mounted horizontal beam 7-1 that lifts; Then, to the described longitudinal reinforcement beam of multiple tracks, 7-2 is worn, and the described longitudinal reinforcement beam of multiple tracks 7-2 and the mounted horizontal beam 7-1 that lifts are fastenedly connected and are integrated; Finally, the horizontal beam 7-1 that lifts of the residue in the described stiffening frame of beam is in length and breadth worn.
During practice of construction, the described D type just longeron of beam 7-4 is parallel laying with longitudinal reinforcement beam 7-2, and the described horizontal beam 7-1 that lifts of described longeron and multiple tracks is fastenedly connected and is integrated.
Described D type just beam 7-4 is divided into just girder segment of a plurality of D types from left to right.In the present embodiment, described D type just beam 7-4 is divided into just girder segment of 5 D types from left to right, and adjacent two the described D types in left and right just are fastenedly connected by connector between girder segment.Described D type just beam 7-4 comprises that twice are the longeron of parallel laying and are laid between the described longeron of twice and are laid in the multiple tracks crossbeam on same level.
In the present embodiment, described connector is the sleeper buttress 7-9 be laid on described support platform.
As shown in Figure 9, it is a plurality of concrete crossties of laying from front to back that described just beam is reinforced both wired sleeper, before and after be provided with steel sleeper 7-10 one between adjacent two described concrete crossties, the two ends, left and right of described steel sleeper 7-10 are the fastening D type that is arranged on just on the twice longeron of beam 7-4 respectively.
During practice of construction, by the D type just beam 7-4 described just beam is reinforced after both wired (being the coal special line) reinforced, can effectively prevent because of coal special line roadbed too high, wear the horizontal disturbance to coal special line circuit while lifting beam 7-1, and the D type just beam 7-4 establish a place at interval of 5m and hang muscle and be connected with the horizontal beam 7-1 that lifts of below.
In the present embodiment, the jacking direction is by north orientation south, both a wired 12-1, both wired two 12-2, both wired three 12-3 and both wired four 12-4 laid successively from south to north.While to being positioned at upper layer bridge, containing that multiple tracks directly over 1 design attitude is horizontal lifts beam 7-1 and worn, set up job platform (or utilizing prefabricated lattice girder end face completed) in burnt willow uplink southern side, the horizontal beam 7-1 that lifts is worn toward north from south.At first, wear the horizontal beam 7-1 that lifts of (being described lattice girder end face scope) in the empty scope of body frame; Then, wear the horizontal beam 7-1 that lifts of (being described lattice girder end face scope both sides) in the empty scope of attached frame, when worn horizontal while lifting beam 7-1 by the coal special line, in time by horizontal lift beam 7-1 and D type just the longeron of beam 7-4 be connected and fixed.
When reality is worn longitudinal reinforcement beam 7-2, need apply for the skylight point to Railway Bureau, utilize track flat car transportation longitudinal reinforcement beam 7-2, longitudinal reinforcement beam 7-2 sets up and puts in place in time and the horizontal beam 7-1 stable connection of lifting, and prevents that longitudinal reinforcement beam 7-2 from toppling.After longitudinal reinforcement beam 7-2 is in place, wears in time the remaining horizontal beam 7-1 that lifts and also fix in time, and observe at any time line direction and height.
In the practice of construction process, wear horizontally while lifting beam 7-1, need first slotting below the wired circuit rail of both pass through, mobilely adjust impact and wears the horizontal sleeper of lifting beam 7-1, successively penetrate the horizontal beam 7-1 that lifts, and be adjusted to sustained height, and press sleeper pitch, every empty sleeper is worn a horizontal beam 7-1 that lifts, wear the principle of horizontal will be engaged in by work while lifting beam 7-1 " every six, wearing ", excavated and worn one, worn one and reinforce one and utilize the railway maintenance equipment vibration compacting that vibrates, with the good described insulating pad of rail contact surface pad.Arrange special messenger's monitoring in construction, prevent the connection electricity, successively construction so repeatedly, strict level of control, direction and track geometry size, guarantee traffic safety, its two ends and longitudinal reinforcement beam 7-2 connect, and horizontal lifting between beam 7-1 and rail adopts rubber pad (being described insulating pad) effectively to insulate, and prevent the connection electricity.
In sum, the key of upper strata lattice girder jacking construction is the built on stilts reinforcing of circuit, lower floor reinforces without circuit is built on stilts during the frame bridge jacking, and after upper strata lattice girder jacking completes, remove the built on stilts ruggedized construction of described circuit and recover railway and normally move, circuit the is built on stilts speed limit 45km/h that needs to go slowly during reinforcing, the Business Line railway is perfectly safe when guaranteeing upper strata lattice girder jacking construction.
In the present embodiment, the built on stilts ruggedized construction of described circuit adopts " the empty method of roof beam structure in length and breadth ", due to the special absolute altitude of coal special line, for the coal special line, adopt " the D type is beam 7-4 and steel sleeper 7-10 just " jointly to form independent built on stilts system, by " the empty method of roof beam structure in length and breadth ", four station tracks are formed to a complete stress system again, bear all loads in railway top.
In step 4, described jacking hole one excavate and step 10 in described jacking is cheated to two while being excavated, according to each bridges and culverts place soil property and space size, can adopt machinery or hand excavation, generally take disposable whole excavation.Excavation work will be expert in the gap of workshop and be carried out, is unearthed fast, and the leveling compacting.When work plane allows, use as far as possible machinery to dig fortune, but the earthwork of substrate top 30cm must be used the hand excavation, the former foundation soil of not disturbance of trying one's best, in order to avoid affect bearing capacity of foundation soil; As less as the stratum bearing capacity, can adopt concrete cushion or change back-up sand folder cobble and reinforce.
Before carrying out in step 5 in upper strata bridges and culverts jacking and step 11 carrying out lower floor's bridges and culverts jacking, must endure strict scrutiny and debug jacking device, examination top power is generally needs 4~8 times of jacking bridge and culvert deadweight, top pick starts simultaneously, synchronously slowly supercharging gradually, and carry out detailed inspection, can continue pressurization after determining the stablizing, work well of each parts, start jacking, in order to avoid prefabricated bridges and culverts and equipment are damaged.Generally every pick top journey is 20cm~80cm, wait pushing up after pick pushed up a stroke, jack piston is resetted, and fills out caving iron at the neutral gear place, and then opens the pick jacking, and iterative cycles like this, until the bridges and culverts jacking is in place.Need to set up the top iron of different specification size and quantity according to the top journey, in order to fill up at any time replacing; Top iron direction must be consistent with the bridge direction of principal axis, and in alignment with jack; For guaranteeing that the fore-set power transmission evenly reaches lateral stability, general top iron is established crossbeam one every 3m~4m, and plane of constraint is provided.
In the present embodiment, the diameter of described permanent support stake 5-1 is that Φ 1.8m and length are 24m, the quantity of described permanent support stake 5-1 is that 24 and its are laid in respectively lateral opening below, lattice girder both sides, upper strata, as upper strata lattice girder permanent support system, jointly bears upper strata lattice girder and railway loading; The diameter of described temporary support pile 5-2 is that Φ 1.8m and length are 20m, the quantity of described temporary support pile 5-2 is the below, middle part that 24 and its are laid in respectively the upper strata lattice girder, as the temporary supporting system of upper strata lattice girder, guarantee lower floor's frame bridge jack-in process resistance to overturning of lattice girder at the middle and upper levels.
In the present embodiment, as shown in figure 12, in step 12 between upper strata bridges and culverts 1 and lower floor's bridges and culverts 2 during concreting, build from the bottom to top layer brick by laying bricks or stones between the lower floor's bridges and culverts 2 first put in place in jacking and the upper strata bridges and culverts 1 of the side of being located thereon, afterwards concreting corresponding formation concrete articulamentum 6 also between upper strata bridges and culverts 1 and lower floor's bridges and culverts 2 again.After upper strata bridges and culverts 1 and the equal jacking of lower floor's bridges and culverts 2 put in place, the gap between upper strata bridges and culverts 1 and lower floor's bridges and culverts 2 is 35cm, and upper strata bridges and culverts 1 forms double-layer frame structural system after being integrated by concreting with lower floor's bridges and culverts 2, jointly bears railway loading.
In the present embodiment, in step 12, between upper strata bridges and culverts 1 and lower floor's bridges and culverts 2 during concreting, the left and right sides of lower floor's bridges and culverts 2 that also need put in place in jacking is concreting form concrete side barricade 8 respectively.
In the present embodiment, the concrete of building between upper strata bridges and culverts 1 and lower floor's bridges and culverts 2 in step 12 is self-compacting concrete.
While between the lower floor's bridges and culverts 2 put in place in jacking and the upper strata bridges and culverts 1 of the side of being located thereon, building layer brick by laying bricks or stones from the bottom to top, in position reserved self-compacting concrete is built pumping outlet, adopts the ground pump directly to build.In casting process, send the special messenger to enter in the lattice girder of upper strata and observe grouting port, grouting port overflows for closely knit, makes upper strata bridges and culverts 1 and lower floor's bridges and culverts 2 be connected to become a complete stress system, bears the multiple load of top railway operation generation and the various impact forces that following south water to north water flowing produces.
The above; it is only preferred embodiment of the present invention; not the present invention is imposed any restrictions, every any simple modification of above embodiment being done according to the technology of the present invention essence, change and equivalent structure change, and all still belong in the protection domain of technical solution of the present invention.

Claims (10)

1. one kind is passed through both wired double-deck jacking culvert construction technology, it is characterized in that: the double-deck jacking of constructing is contained for passing through both wired double-deck bridges and culverts, described double-deck bridges and culverts comprises upper strata bridges and culverts (1) and is positioned at the lower floor's bridges and culverts (2) under upper strata bridges and culverts (1), described upper strata bridges and culverts (1) is positioned at both wired belows of pass through, described upper strata bridges and culverts (1) and lower floor's bridges and culverts (2) are between reinforced concrete structure and the two and are integrated by concreting, and the left and right of described upper strata bridges and culverts (1) is greater than the left and right of lower floor's bridges and culverts (2) to length to length; This bilayer jacking is contained construction technology and is comprised the following steps:
Step 1, upper strata bridges and culverts are prefabricated: after having excavated the prefabricated pit one for prefabricated upper strata bridges and culverts (1), at described prefabricated pit one interior prefabricated upper strata bridges and culverts (1);
Step 2, back and the construction of rear back beam for the bridges and culverts jacking of upper strata: the back one (3-1) in the interior construction of described prefabricated pit one for jacking upper strata bridges and culverts (1), and in back one (3-1) front side, rear back beam one (4-1) is set; Described back one (3-1) and rear back beam one (4-1) all are arranged in the dead astern of the prefabricated upper strata bridges and culverts (1) completed of step 1;
Step 3, both wired reinforcings: adopt the built on stilts ruggedized construction of circuit to both wired reinforcings of pass through;
Step 4, upper strata bridges and culverts jacking hole excavation: from front to back the hole of the jacking for jacking upper strata bridges and culverts (1) is excavated, described jacking hole one is positioned at the dead ahead of prefabricated pit described in step 1 one and itself and described prefabricated pit one and connects as one;
Step 5, upper strata bridges and culverts jacking: adopt jacking device by the prefabricated upper strata bridges and culverts (1) completed in step 1 forward jacking to design attitude;
Step 6, the construction of upper strata bridges and culverts bottom support system: upper strata bridges and culverts (1) bottom that jacking puts in place in step 5 arranges the bottom support system; Described bottom support system comprises the many permanent support stakes (5-1) that are supported on below, upper strata bridges and culverts (1) left and right sides and is supported on the many temporary support piles (5-2) of below, upper strata bridges and culverts (1) middle part; The many described permanent support stakes (5-1) of below, described upper strata bridges and culverts (1) left and right sides form the permanent support system of upper strata bridges and culverts (1), and many described temporary support piles (5-2) form the temporary supporting system of upper strata bridges and culverts (1);
Step 7, the built on stilts ruggedized construction of circuit are removed: the built on stilts ruggedized construction of circuit described in step 3 removed, and by both wired being supported in step 5 on the upper strata bridges and culverts (1) that jacking puts in place of pass through;
Step 8, lower floor's bridges and culverts are prefabricated: after having excavated the prefabricated pit two for prefabricated lower floor bridges and culverts (2), at described prefabricated pit two interior prefabricated lower floor bridges and culverts (2);
Step 9, back and the construction of rear back beam for lower floor's bridges and culverts jacking: the back two (3-2) in the interior construction of described prefabricated pit two for jacking lower floor bridges and culverts (2), and in back two (3-2) front side, rear back beam two (4-2) is set; Described back two (3-2) and rear back beam two (4-2) all are arranged in the dead astern of the prefabricated lower floor's bridges and culverts (2) completed of step 8;
Step 10, lower floor bridges and culverts jacking hole excavation: from front to back the hole of the jacking for jacking lower floor bridges and culverts (2) two is excavated, described jacking hole two is positioned at the dead ahead of prefabricated pit described in step 9 two and itself and described prefabricated pit two and connects as one;
Step 11, lower floor's bridges and culverts jacking: adopt jacking device by the prefabricated lower floor's bridges and culverts (2) completed in step 8 forward jacking to design attitude; Described lower floor bridges and culverts (2) in jack-in process, is removed the system of temporary supporting described in step 6 to front by rear forward;
Step 12, concreting: after the bridges and culverts of lower floor described in step 11 (2) jacking puts in place, concreting between upper strata bridges and culverts (1) and lower floor's bridges and culverts (2), make upper strata bridges and culverts (1) and lower floor's bridges and culverts (2) be fastenedly connected and be integrated.
2. according to a kind of both wired double-deck jacking culvert construction technology of passing through claimed in claim 1, it is characterized in that: in step 1, upper strata bridges and culverts (1) is carried out in prefabricated and step 8, lower floor's bridges and culverts (2) being carried out in prefabricated process, when forming panel used carries out Zhi Li or dismounting to prefabricated upper strata bridges and culverts (1) and lower floor's bridges and culverts (2), all adopt the formwork hoisting device to be lifted described forming panel; Described forming panel is formed by the polylith template splicing, and described upper strata bridges and culverts (1) and lower floor's bridges and culverts (2) are needs prefabricated bridges and culverts;
Described formwork hoisting device comprises vertical supporting framework (9-1), be arranged on slipway beam (9-2) on vertical supporting framework (9-1), to be arranged on slipway beam (9-2) upper and can carry out the sliding component of horizontal shifting and be arranged on the template lifting means (9-3) of described sliding component below along slipway beam (9-2), and described vertical supporting framework (9-1) is laid in the surrounding outside of the prefabricated bridges and culverts of described need; Described slipway beam (9-2) is level to laying.
3. according to the described a kind of both wired double-deck jacking culvert construction technology of passing through of claim 1 or 2, it is characterized in that: described lower floor bridges and culverts (2) is divided into three bridges and culverts sections from left to right, and three described bridges and culverts sections are respectively left side sections, middle part sections and right side sections from left to right; In step 8 during prefabricated lower floor bridges and culverts (2), to described left side sections, middle part sections and right side sections, carry out respectively prefabricated, prefabricated described left side sections, middle part sections and right side sections are laid on same straight line, and described left side sections and described right side sections lay respectively at the left and right sides of described middle part sections; While carrying out lower floor's bridges and culverts jacking in step 11, first the sections jacking of described middle part is put in place, then the sections jacking of described left side is put in place, finally the sections jacking of described right side is put in place.
4. according to the described a kind of both wired double-deck jacking culvert construction technology of passing through of claim 1 or 2, it is characterized in that: in step 12 between upper strata bridges and culverts (1) and lower floor's bridges and culverts (2) during concreting, build from the bottom to top layer brick by laying bricks or stones between the lower floor's bridges and culverts (2) first put in place in jacking and the upper strata bridges and culverts (1) of the side of being located thereon, afterwards concreting corresponding formation concrete articulamentum (6) also between upper strata bridges and culverts (1) and lower floor's bridges and culverts (2) again; In step 12, between upper strata bridges and culverts (1) and lower floor's bridges and culverts (2) during concreting, the left and right sides of lower floor's bridges and culverts (2) that also need put in place in jacking is concreting form concrete side barricade (8) respectively.
5. according to the described a kind of both wired double-deck jacking culvert construction technology of passing through of claim 1 or 2, it is characterized in that: described upper strata bridges and culverts (1) is lattice girder, and described lower floor bridges and culverts (2) is frame bridge.
6. a kind ofly pass through both wired double-deck jackings and contain construction technology according to claimed in claim 2, it is characterized in that: the steel pipe scaffold that described vertical supporting framework (9-1) is the reinforcing cage for the prefabricated bridges and culverts of the described need of colligation set up in advance.
7. according to the described a kind of both wired double-deck jacking culvert construction technology of passing through of claim 1 or 2, it is characterized in that: the suspension hook (9-8) for lifting template is installed on described template lifting means (9-3); Described template lifting means (9-3) is electric hoist equipment, and described formwork hoisting device also comprises the on-off controller (9-9) that described electric hoist equipment is carried out to switch control, and described on-off controller (9-9) joins with described electric hoist equipment; The pulley (9-6) that described sliding component comprises link (9-7) and is arranged on link (9-7) top and can in slipway beam (9-2), carries out the front and back slippage, described template lifting means (9-3) is arranged on described link (9-7) bottom; Described slipway beam (9-2) is i iron.
8. according to the described a kind of both wired double-deck jacking culvert construction technology of passing through of claim 1 or 2, it is characterized in that: both wired quantity of passing through is many, many described both wired acceptances of the bid high minimum both wired be that low level is both wired, high both wired for just the beam reinforcing is both wired than more than the described low level both wired high 50cm of absolute altitude of many described both wired acceptances of the bid;
The built on stilts ruggedized construction of circuit described in step 3 comprises beam stiffening frame in length and breadth and the lower support structure that the described stiffening frame of beam is in length and breadth supported, and described lower support structure comprises a plurality of vertical buttress (7-8) below the left and right sides that is supported on respectively the described stiffening frame of beam in length and breadth and front side; The described stiffening frame of beam in length and breadth is rectangular frame, and the left and right of described rectangular frame is greater than left and right from upper strata bridges and culverts (1) to length is greater than the front and back of upper strata bridges and culverts (1) to width to length and its front and back to width; The described stiffening frame of beam in length and breadth comprises that multiple tracks is laid from left to right horizontally lifts beam (7-1) and multiple tracks is laid in the described horizontal longitudinal reinforcement beam (7-2) of lifting beam (7-1) top of multiple tracks from front to back, multiple tracks is described horizontally lifts that beam (7-1) is parallel laying and it is laid on same level, and the described longitudinal reinforcement beam of per pass (7-2) all is fastenedly connected and is integrated with the described horizontal beam (7-1) of lifting of multiple tracks; The described horizontal beam (7-1) of lifting of multiple tracks forms many described both wired support platforms that supported; The described longitudinal reinforcement beam of multiple tracks (7-2) is parallel laying and it is laid on same level, and described longitudinal reinforcement beam (7-2) is vertical laying with the horizontal beam (7-1) of lifting; The described horizontal length direction of lifting beam (7-1) is parallel laying with upper strata bridges and culverts (1) with the jacking direction of lower floor's bridges and culverts (2);
Be provided with on described support platform described just beam is both reinforced to just beam (7-4) of wired D type of being reinforced, described just beam reinforce both wired by the D type just beam (7-4) be supported on described support platform, described D type just beam (7-4) and longitudinal reinforcement beam (7-2) be parallel laying and its quantity and many described both wired in just the beam reinforcing both wired quantity was identical; Many except described just beam is reinforced, each both wired is both wired all to be supported on described support platform by insulating pad in described both wired.
9. according to a kind of both wired double-deck jacking culvert construction technology of passing through claimed in claim 8, it is characterized in that: while adopting the built on stilts ruggedized construction of circuit to wired reinforcing of both pass through in step 3, first adopt the D type just beam (7-4) described just beam is reinforced to both wired reinforcings, and by described D type just beam (7-4) temporary supporting on described lower support structure; Afterwards, wear the horizontal beam (7-1) of lifting of multiple tracks be positioned at directly over upper strata bridges and culverts (1) design attitude on described lower support structure, and the horizontal beam (7-1) of lifting worn is installed on described lower support structure, to horizontal lift beam (7-1) when being installed by the D type just the longeron of beam (7-4) be fastenedly connected and be integrated with the mounted horizontal beam (7-1) of lifting; Then, the described longitudinal reinforcement beam of multiple tracks (7-2) is worn, and the described longitudinal reinforcement beam of multiple tracks (7-2) and the mounted horizontal beam (7-1) of lifting are fastenedly connected and are integrated; Finally, the horizontal beam (7-1) of lifting of the residue in the described stiffening frame of beam is in length and breadth worn.
10. according to a kind of both wired double-deck jacking culvert construction technology of passing through claimed in claim 8, it is characterized in that: described lower support structure also comprises the many vertical supporting stakes (7-3) that are supported on respectively the described stiffening frame of beam in length and breadth below; From front to back described jacking hole one is carried out in digging process in step 4, the vertical supporting stake (7-3) that is supported on below, the described stiffening frame of beam in length and breadth middle part is removed to front by rear; It is a plurality of concrete crossties of laying from front to back that described just beam is reinforced both wired sleeper, before and after be provided with one steel sleeper (7-10) between adjacent two described concrete crossties, the two ends, left and right of described steel sleeper (7-10) are the fastening D type that is arranged on just on the twice longeron of beam (7-4) respectively.
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CN104695315A (en) * 2015-03-06 2015-06-10 中铁工程设计咨询集团有限公司 Frame structure of deep foundation pit under existing railway and layered jacking method for construction of frame structure
CN104695315B (en) * 2015-03-06 2017-02-01 中铁工程设计咨询集团有限公司 Frame structure of deep foundation pit under existing railway and layered jacking method for construction of frame structure
CN105178190A (en) * 2015-08-05 2015-12-23 中铁六局集团天津铁路建设有限公司 Construction method for leveling line elevation difference by overlapping short-section I-shaped steel on cross beams
CN105178190B (en) * 2015-08-05 2016-08-17 中铁六局集团天津铁路建设有限公司 A kind of construction method of the crossbeam overlay pipe nipple I-steel levelling circuit discrepancy in elevation
CN106246190A (en) * 2016-08-12 2016-12-21 中铁二十局集团第四工程有限公司 A kind of nine base tunnel construction methods of tunnel and Double sidewall
CN106246190B (en) * 2016-08-12 2018-05-15 中铁二十局集团第四工程有限公司 A kind of nine base tunnel construction methods of tunnel and Double side wall
CN106869944A (en) * 2017-02-14 2017-06-20 中国电建集团华东勘测设计研究院有限公司 The extra small clear-distance tunnel construction method in underground interchange intersection under complex environment
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CN109812271A (en) * 2019-01-25 2019-05-28 中铁十一局集团城市轨道工程有限公司 A kind of shield crosses the construction method for invading limit box culvert
CN109812271B (en) * 2019-01-25 2020-08-28 中铁十一局集团城市轨道工程有限公司 Construction method for shield-crossing limited box culvert
CN110130901A (en) * 2019-04-26 2019-08-16 中铁二十三局集团第六工程有限公司 On across both wired Urban Underground mining sectbn construction methods
CN111676819A (en) * 2020-06-08 2020-09-18 中铁六局集团太原铁路建设有限公司 Jacking construction method for combined type temporary beam continuous reinforced line large-span frame structure bridge
CN111764315A (en) * 2020-07-09 2020-10-13 中铁六局集团天津铁路建设有限公司 Method for sleeving top of railway culvert in flood season

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