CN101831873B - Temporary bridge covered excavation method for constructing box culvert below traffic ground line of operating track - Google Patents
Temporary bridge covered excavation method for constructing box culvert below traffic ground line of operating track Download PDFInfo
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- CN101831873B CN101831873B CN2010101817609A CN201010181760A CN101831873B CN 101831873 B CN101831873 B CN 101831873B CN 2010101817609 A CN2010101817609 A CN 2010101817609A CN 201010181760 A CN201010181760 A CN 201010181760A CN 101831873 B CN101831873 B CN 101831873B
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Abstract
The invention discloses a temporary bridge covered excavation method for constructing a box culvert below a traffic ground line of an operating track, which comprises the following steps of: constructing supporting piles and pile top beams at two sides of the existing line, temporarily removing the line, and constructing prestressed concrete box type beams on the top beams to form a temporary bridge supporting system to be used as a temporary supporting structure of the line; and then, recovering the line, excavating soil bodies at the lower part step by step under the protection of the temporary bridge supporting system, and casting the box culvert structure in the field section by section. In the construction process of the box culvert, stress conversion of the supporting piles needs to be carried out, partial supporting piles are removed to enable the box culvert to become the supporting structure of the line, and the top beams and the constructing prestressed concrete box type beams are reserved for the permanent supporting structure of the line, thereby reducing the influence of construction on the operation of the traffic line of the existing track.
Description
Technical field
The present invention relates to the municipal engineering field, relate in particular to a kind of suspension bridge cover and cut construction method of below operation track traffic ground line, building box culvert.
Background technology
Along with the extensive development of urban track traffic and the development construction of urban operating mechanism, when being arranged at present with operation rail line grade separation, many roads need build down the box culvert of wearing, inevitably surrounding soil is produced disturbance during the box culvert construction, and then influence track structure and train running speed on the operating line, even jeopardize the security of operation of train, along with the web development of rail line, build the train speed limit that box culvert may cause or stop transport and all will produce bigger influence.Therefore need research more reasonably job practices and control measure, reduce the influence of construction to greatest extent the existing line operation.
At present, below existing line, build box culvert and adopt the method for the direct jacking of box culvert more, though this technology comparative maturity, but for track traffic, because Train Interval is short, transport power is big, especially requires than higher route the speed limit in the box culvert jack-in process or cut off traffic and all will cause bigger society and economic impact in heavy traffic or to operation.The job practices of the direct jacking of this box culvert can be subjected to passing through regional landform and the restriction of structure on every side inevitably, in addition, track circuit or special track form are strict to the requirement and the restriction ratio of construction, the job practices of the direct jacking of conventional box culvert is not easy to satisfy its requirement, may produce bigger influence to the safety and the stationarity of train operation.Though the cap excavation method of domestic common employing at present has compliance more widely in underground construction, then there is certain problem in the rail line in being applied to run:
1. the cover plate system adopts military beam and prefabricated reinforced concrete cover plate etc. more, though these systems can be reused to a certain extent, its rigidity is little, and globality is poor, is out of shape bigger.And the track structure of track traffic need keep higher ride comfort to satisfy the requirement of traveling security and comfortableness.
2. cover the cover plate system of digging and normally use as temporary pavement, after the underground structure construction is finished, it need be removed and recover original road surface again, cause secondary to disturb to traffic above-ground, this influences concerning rail line greatly.
3. joist support weighs the system complexity in length and breadth, and excavation pit need be provided with multiple tracks horizontal support and interim column sometimes, is unfavorable for building box culvert.
Summary of the invention
Technical problem to be solved by this invention provides a kind of suspension bridge cover and cut construction method of building box culvert below the operation rail line, promptly apply supporting pile and stake apical cap beam in the existing line both sides, the interim circuit of removing, on Guan Liang, set up prestressed concrete box type crossbeam, form the suspension bridge support system, as the temporary support structure of circuit.Recover circuit then, and under the protection of suspension bridge support system, the step excavation bottom soil body, the cast-in-place box culvert structure of segmentation.Need carry out the stressed conversion of supporting pile in the box culvert work progress, remove the part supporting pile and make box culvert become the braced structures of circuit, Guan Liang and prestressed concrete box girder give over to the permanent bearing structure of circuit, reduce the influence of construction to the existing line operation with this.
Suspension bridge cap excavation method of the present invention is different from conventional cap excavation method, its adopts supporting pile, stake apical cap beam to come of age prestressed concrete box type beam on the beam as temporary supporting system, simplified complicated cover plate bearing system of beam in length and breadth and horizontal support system, set up at prestressed concrete box girder and just to recover circuit after finishing, guarantee the stable of bearing structure, reduce the influence of construction as far as possible the existing line operation.Method of the present invention not only can be applied to rail line, the government railway circuit in also can being applied to run.
The technical scheme that technical solution problem of the present invention is taked is a kind of cover and cut construction method that box culvert is built in the rail line below of runing, and may further comprise the steps:
Step 1: direction applies supporting pile on road along the line, rail line both sides, and the length of supporting pile is determined by calculating, and should guarantee to bear the load that superstructure hands down, and makes stake apical cap beam at the supporting pile top application then;
Step 2: remove link after rail line is stopped transport, comprise conductor rail, track structure and other installations and facilities, excavate the earthwork to a stake apical cap top surface of the beam position, the horizontal path direction is set up concrete pre-stress case beam on stake apical cap beam, form the suspension bridge support system,, to be testedly can open circuit after folding lattice as the temporary support structure of circuit.
Step 3: the step excavation bottom soil body under the protection of suspension bridge support system, the cast-in-place circuit of segmentation below box culvert structure.During the excavation soil body, put the middle pilot tunnel soil body of slope excavation earlier, build box culvert, excavate soil at both sides again, apply the two side holes box culvert.Before the excavation soil at both sides, need to reinforce and to plan to build the box culvert soil at both sides, set up temporary steel support building between box culvert and the soil mass consolidation, guarantee stability of slope.When box culvert applies, build the box culvert between the supporting pile earlier, remove to invade the supporting pile in the box culvert range of structures then, the Load Transfer that will be born by supporting pile is finished the interstructural stressed conversion of supporting pile and box culvert on the box culvert structure of having built.Build residue box culvert structure afterwards, the supporting pile outside the box culvert structure, stake apical cap beam and prestressed concrete box girder give over to the permanent bearing structure of circuit.
Preferably, in step 1, adopt proper supporting stake stake long, footpath and pile spacing according to circuit ambient conditions and geological condition, the excavation access site suitably adds timber pile footpath and pile spacing.
Preferably, in step 2, select the prestressed concrete box girder size of being convenient to construct according to top operation rail line characteristics and structural bearing capacity.
Preferably, in step 3, adjust drilling depth, the scope of excavation of foundation pit and put the sloping gradient, the cast-in-place box culvert structure of segmentation according to actual conditions.
The present invention can be widely used in wearing under the constructing road box culvert rail line of runing, can guarantee the safety of existing line effectively and reduce the influence that construction corps's existing line is runed, be particularly useful for runing busier or to the track structure deformation requirements than higher location, favorable economic benefit and social benefit are arranged.
Description of drawings
Fig. 1 is suspension bridge support system figure.
Fig. 2 is the A-A sectional drawing of suspension bridge support system.
Fig. 3 is the figure that builds of box culvert between the supporting pile.
Fig. 4 is the figure that builds of box culvert.
The specific embodiment
Describe below in conjunction with a concrete case history.This case history is to implement under the prerequisite of technical solution of the present invention, provides concrete embodiment and operating process, but protection scope of the present invention is not limited to following example.
Planning to build box culvert is the urban track traffic ground line of wearing operation under the newly-built road, and rail line is a two-wire, and distance between centers of tracks is 3.6 meters, and the train normal running speed is 65～70 kilometers/hour, and is ballast bed.The proposed road box culvert is four hole box culverts, 50.7 meters of beam overalls, and 7.3 meters of height overalls, plate apex distance flange of rail minimum range is 1.273 meters.
Among Fig. 1: set supporting pile 2 and apply an apical cap beam 3 in operation rail line 1 both sides, 10 meters of circuit both sides pile body clear distances, 1.2 meters in stake footpath, stake long 16.4 meters (embedded depth is 10 meters behind the excavation pit), 3.5 meters of pile spacings, excavation passage 6 both sides pilespacings increase to 5.5 meters, and the stake footpath is adopted 1.5 meters.
Treat the circuit stoppage in transit, behind the dismounting line facility, on both sides stake apical cap beam 3, set up prestressed concrete box girder 4,1.5 meters of case deck-sidings, high 0.65 meter, 10 meters of net spans are as the main support structure of circuit, form the suspension bridge support system, recover circuit afterwards, open operation.
Among Fig. 1, the soil body 5 of the box culvert both sides that grouting and reinforcing is planned to build.The soil body is to design elevation below step excavation circuit under the protection of suspension bridge support system.Put slope excavation mid portion soil mass of foundation pit earlier, build box culvert 7, excavate soil at both sides 8 again, apply the side opening box culvert.Set up temporary steel support 13 between box culvert and the soil mass consolidation building during excavation, guarantee stability of slope.
9 is the rail line center line among Fig. 2, and 10 is conductor rail, and 11 is rail.
Among Fig. 3, when box culvert applies, build the box culvert 7 between the supporting pile earlier, remove to invade the supporting pile in the box culvert range of structures then, the Load Transfer that will be born by supporting pile 2 is finished the interstructural stressed conversion of supporting pile and box culvert on the box culvert structure of having built.
Among Fig. 4, build residue box culvert structure 7, the supporting pile 2 outside the box culvert structure, stake apical cap beam 3 and prestressed concrete box girder 4 give over to the permanent bearing structure of circuit.Wherein 14 is deformation joint.
Claims (5)
1. run the suspension bridge cap excavation method that box culvert is built in track traffic above-ground route below for one kind, may further comprise the steps:
Step 1: at first apply supporting pile in operation road along the line, track traffic above-ground route both sides direction, the length of supporting pile is determined by calculating, and should guarantee to bear the load that superstructure hands down, and makes stake apical cap beam at the supporting pile top application then;
Step 2: remove conductor rail, track structure and other installations and facilities after the operation rail line is stopped transport, excavate the earthwork of circuit roadbed to stake apical cap top surface of the beam absolute altitude position, the horizontal path direction is abound with on stake apical cap beam and sets up the steel concrete prestress box beam, form the suspension bridge support system, as the current interim suspension bridge of rail line, recover to open the operation rail line after the acceptance(check);
Step 3: the step excavation bottom soil body under the protection of suspension bridge support system; the cast-in-place circuit of segmentation below box culvert structure; put the middle pilot tunnel soil body of slope excavation earlier; build box culvert; excavate soil at both sides again; apply the both sides box culvert; before the excavation soil at both sides; need to reinforce and plan to build the box culvert soil at both sides; set up temporary steel support building between box culvert and the soil mass consolidation, guarantee stability of slope, when box culvert applies; build the box culvert between the supporting pile earlier; remove to invade the supporting pile in the box culvert range of structures then, the Load Transfer that will be born by supporting pile is finished the interstructural stressed conversion of supporting pile and box culvert on the box culvert structure of having built; then build residue box culvert structure, the supporting pile outside the box culvert structure; Guan Liang and prestressed concrete box girder give over to the permanent support structure of circuit.
2. a kind of suspension bridge cap excavation method that box culvert is built in track traffic above-ground route below of runing as claimed in claim 1 is characterized in that in step 1, according to the long and pilespacing of stake of circuit ambient conditions and the stake of geological condition employing proper supporting.
3. a kind of suspension bridge cap excavation method that box culvert is built in track traffic above-ground route below of runing as claimed in claim 1 is characterized in that in step 2, selects the prestressed concrete box girder size of being convenient to construct according to top line feature and structural bearing capacity.
4. a kind of suspension bridge cap excavation method that box culvert is built in track traffic above-ground route below of runing as claimed in claim 1 is characterized in that in step 3, adjusts drilling depth, the scope of excavation of foundation pit and puts the sloping gradient, the cast-in-place box culvert structure of segmentation according to actual conditions.
5. a kind of suspension bridge cap excavation method that box culvert is built in rail line above-ground route below of runing as claimed in claim 1, it is characterized in that in step 3, elder generation's step excavation soil body design elevation at the bottom of the case beam, supporting pile buries certain depth as foundation pile planning to build box culvert bottom, adopt cap excavation method to build box culvert structure between the stake of circuit supported underneath then, the above supporting pile in foundation ditch bottom surface is removed in last segmentation, builds residue box culvert structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010101817609A CN101831873B (en) | 2010-05-25 | 2010-05-25 | Temporary bridge covered excavation method for constructing box culvert below traffic ground line of operating track |
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| CN2010101817609A CN101831873B (en) | 2010-05-25 | 2010-05-25 | Temporary bridge covered excavation method for constructing box culvert below traffic ground line of operating track |
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| CN101831873A CN101831873A (en) | 2010-09-15 |
| CN101831873B true CN101831873B (en) | 2011-11-09 |
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| CN102312400A (en) * | 2011-07-13 | 2012-01-11 | 中铁六局集团石家庄铁路建设有限公司 | Lifting supporting device |
| CN102425098B (en) * | 2011-08-22 | 2014-11-26 | 同济大学建筑设计研究院(集团)有限公司 | Makeshift railway bridge for ensuring normal operation of existing line and design method thereof |
| CN102505626A (en) * | 2011-11-10 | 2012-06-20 | 中铁十七局集团有限公司 | Temporary bridge for trunk railway |
| CN103485287B (en) * | 2012-06-15 | 2016-05-04 | 北京交通大学 | Prestressing applying method in the construction of concrete frame box culvert |
| CN103590404B (en) * | 2012-08-13 | 2016-04-27 | 上海市政工程设计研究总院（集团）有限公司 | A kind of foundation ditch method for supporting being close to built underground structure |
| CN102776844A (en) * | 2012-08-14 | 2012-11-14 | 中铁六局集团天津铁路建设有限公司 | Protection culvert for pile or plate type structure |
| CN102943487B (en) * | 2012-11-14 | 2014-11-26 | 宁波中科盛博建设有限公司 | Construction method of prestress common pipe ditch |
| CN106274556B (en) * | 2016-08-05 | 2018-07-20 | 中铁六局集团天津铁路建设有限公司 | A kind of contact net bar changes shifting method |
| CN106759473B (en) * | 2016-11-11 | 2019-01-22 | 中国建筑第八工程局有限公司 | The constructing structure and its construction method of underground pipe gallery and road |
| CN107090851B (en) * | 2017-04-24 | 2019-06-11 | 北京城建道桥建设集团有限公司 | The inverted side-wall construction method of downtown area open cut groove |
| CN107190630A (en) * | 2017-07-04 | 2017-09-22 | 重庆大学 | Road changes the new cap excavation method of stealthy bridge type |
| CN108867664B (en) * | 2018-09-04 | 2023-09-15 | 临沂大学 | Road-to-bridge Duan Jikeng supporting structure based on reverse construction method and construction method thereof |
| CN111305074B (en) * | 2020-03-23 | 2021-05-14 | 中铁七局集团郑州工程有限公司 | Construction method for integrally dropping jacking box bridge with upward floating exceeding standard |
| CN111926710A (en) * | 2020-07-29 | 2020-11-13 | 中铁二十局集团第六工程有限公司 | Overhead fixing device for multi-track railway |
| CN112663405A (en) * | 2020-11-30 | 2021-04-16 | 中国十七冶集团有限公司 | Railway underpass box culvert jacking track reinforcing method |
| CN112695656B (en) * | 2020-12-29 | 2022-07-12 | 广州地铁设计研究院股份有限公司 | Box culvert construction method for road widening and box culvert |
| CN113789734A (en) * | 2021-09-16 | 2021-12-14 | 广州机施建设集团有限公司 | Oil pipeline group protection box culvert structure |
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Inventor after: Liu Yunliang Inventor after: Li Ling Inventor after: Li Niannian Inventor after: Ran Hongling Inventor after: Fan Xin Inventor after: Yin Xiao Inventor after: Li Hong Inventor after: Bai Haiwei Inventor before: Liu Yunliang Inventor before: Li Ling Inventor before: Li Niannian Inventor before: Ran Hongling Inventor before: Fan Xin Inventor before: Yin Xiao |
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Address after: 100037 No. 5 North Main Street, Beijing, Xicheng District, Fuchengmen Patentee after: BEIJING URBAN CONSTRUCTION DESIGN & DEVELOPMENT GROUP CO., LIMITED Address before: 100037 No. 5 North Main Street, Beijing, Xicheng District, Fuchengmen Patentee before: Beijing Urban Establishing Design & Research Institute Co., Ltd. |