CN106283967A - Medium-and low-speed maglev two-wire embankment location pile foundation joist framing type support rail beam transition section structure - Google Patents

Medium-and low-speed maglev two-wire embankment location pile foundation joist framing type support rail beam transition section structure Download PDF

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Publication number
CN106283967A
CN106283967A CN201610825204.8A CN201610825204A CN106283967A CN 106283967 A CN106283967 A CN 106283967A CN 201610825204 A CN201610825204 A CN 201610825204A CN 106283967 A CN106283967 A CN 106283967A
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China
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support rail
rail beam
base plate
pile foundation
armored concrete
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CN201610825204.8A
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CN106283967B (en
Inventor
郭建湖
李小和
赵新益
姜鹰
姚洪锡
李巍
王勇刚
杨辉建
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China Railway Siyuan Survey and Design Group Co Ltd
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China Railway Siyuan Survey and Design Group Co Ltd
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01BPERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B25/00Tracks for special kinds of railways
    • E01B25/30Tracks for magnetic suspension or levitation vehicles
    • E01B25/305Rails or supporting constructions

Abstract

The invention belongs to that middle low speed magnetic suspension traffic engineering is low puts Line technology field, and disclose medium-and low-speed maglev two-wire embankment location pile foundation joist framing type support rail beam transition section structure, including roadbed filling, support rail beam both sides backfill filler, bridge abutment, trapezoidal filling body and headwall under pile foundation carrying structure, two placing of reinforcement concrete support rail beam base plates, reinforced concrete supporting beam, two placing of reinforcement concrete beam-type structures, support rail beam, pile foundation carrying structure is provided with many;Described reinforced concrete beam type structure is accepted on the top of armored concrete support rail beam base plate;Support rail beam both sides backfill filler is accepted by roadbed filling under described support rail beam.Long-time stability of the present invention are more preferable, both met the deformation of support rail girder construction and the high request of settlement after construction, meet again the requirement of the controllability of bedding long-time stability, durability and construction quality, effectively realize magnetic suspension elevated structure and the low smoothly transition putting line transition section F rail.

Description

Medium-and low-speed maglev two-wire embankment location pile foundation joist framing type support rail beam transition section structure
Technical field
The invention belongs to that middle low speed magnetic suspension traffic engineering is low puts Line technology field, more particularly, to middle low speed magnetic Floating two-wire embankment location support rail beam transition section structure pattern.
Background technology
Middle low speed magnetic suspension track traffic belongs to a kind of novel traffic mode, and achievement in research both domestic and external is less, the whole world Open the circuit minority especially of operation.The middle low speed magnetic suspension railway business fortune that the most only in March, 2005, Japan's construction was opened The middle low speed magnetic suspension railway business operating line that line-the East Hillside Line and in June, 2014, Korea S opened.And the middle low speed of China Magnetic suspension traffic only National University of Defense technology's test wire, Green City Mountain test wire, Tangshan experiment line at present, but do not put into effect Formal circuit, and all based on elevated structure, rarely seen relevant elevated structure and the low research put in terms of line transition segment structure and Application.
In wheel rail high speed railway, there is substantial amounts of bridge changeover portion roadbed, high-speed railway changeover portion roadbed uses mostly Trapezium structure, have employed cement stabilized graded macabam in trapezoidal scope and fills, and have employed than the non-higher compacting of changeover portion roadbed Requirement.During built high-speed railway operation, bridge changeover portion scope, often there is non-fragment orbit protuberance, gap, grout Etc. disease.The reason of this disease, is owing to changeover portion roadbed remains by the earth structure of rock and soil constitution, changeover portion mostly After roadbed is laid a railway track, still can occur necessarily to settle, there is poor (the specification permission settlement after construction of certain settlement after construction with bridge abutment Difference is not more than 5mm), owing to high-speed railway uses seamless track steel rail, in the range of specification allows settlement after construction difference, have no effect on Normal operation, but the diseases such as non-fragment orbit protuberance, gap, grout can be caused, need timely repair and maintenance.
The F rail of medium-and low-speed maglev traffic line is to be used fishplate bar scene to be spliced by a short rail successively, and leaves between rail Seam, meets the ride comfort of the F rail of magnetic-levitation train even running requirement, and under rail to be leaned on, works ensures.Low put circuit location, Under support rail beam, basis is by the earth structure of rock and soil constitution, is affected by the factor such as landform, geological conditions, and quality is the most easily-controllable System, is easily generated differential settlement under load and various factor of natural environment effect, can occur unavoidably and elevated structure bridge bridge The settlement after construction that platform is inconsistent, produces settlement after construction poor, and low circuit of putting occurs in that differential settlement with bridge abutment position, necessarily affects The ride comfort of F rail, in some instances it may even be possible to cause F rail to produce the problem such as faulting of slab ends, deformation, time serious, will affect the normal fortune of maglev vehicle Battalion.
Summary of the invention
For disadvantages described above or the Improvement requirement of prior art, the invention provides medium-and low-speed maglev two-wire embankment location and divide Width pile foundation joist type support rail beam transition section structure, had both met elevated structure and the low rigidity put between circuit and sedimentation transition, had protected Card magnetic suspension traffic engineering elevated structure and the low ride comfort requirement putting line transition section F rail, meet again magnetic floating traffic engineering low Put the intensity of line transition section sub rail foundation, long-time stability requirement, and construction quality controllability is strong.
For achieving the above object, the invention provides medium-and low-speed maglev two-wire embankment location framing pile foundation joist type support rail beam Transition section structure, it is characterised in that include that pile foundation carries structure, two placing of reinforcement concrete support rail beam base plates, armored concrete torr Roadbed filling under beam, two placing of reinforcement concrete beam-type structures, support rail beam, support rail beam both sides backfill filler, bridge abutment, trapezoidal fill out Building body and headwall, wherein,
Described pile foundation carrying structure is provided with many, and every described pile foundation carrying structure is all vertically arranged, and every institute Described reinforced concrete supporting beam is all accepted on the top stating pile foundation carrying structure;
Reinforced beam described in a corresponding row is accepted at the top often arranging described armored concrete support rail beam base plate respectively Formula structure;
Described reinforced concrete beam type structure is accepted on the top of described armored concrete support rail beam base plate;
The top of described pile foundation carrying structure embeds described reinforced concrete supporting beam and just connects with it, described armored concrete torr Beam has just connect with described armored concrete support rail beam base plate or has overlapped, described armored concrete support rail beam base plate and described reinforced concrete Soil girder structure formed by integrally casting molding thus collectively form armored concrete support rail beam;
Described in two rows, between armored concrete support rail beam base plate, filler between support rail beam is set;
Described reinforced concrete supporting beam both sides are provided with for limiting described armored concrete support rail beam base plate lateral displacement Convex gear platform;
Arranging wired weathering section described in two rows between reinforced concrete beam type structure, between described line, weathering section has Cross fall and head fall, for current are introduced two adjacent sections armored concrete support rail beam base plate internode expansion joint and then Current are discharged;
Under described support rail beam, roadbed filling is arranged between shallow layer reinforcement district and described armored concrete support rail beam base plate, with For providing construction flat for described armored concrete support rail beam base plate, reinforced concrete supporting beam and support rail beam both sides backfill filler Platform, and provide lateral support for described pile foundation carrying structure;Wherein, described shallow layer reinforcement district is arranged on the shallow table of soft stratum Layer, and roadbed filling and the vertical consistency of described reinforced concrete beam type structure under described shallow layer reinforcement district, described support rail beam;
Described support rail beam both sides backfill filler is accepted by roadbed filling under described support rail beam, and described support rail beam both sides Backfill filler props up the both sides of described armored concrete support rail beam base plate, so that described armored concrete support rail beam base plate is risen protection Act on and retrain the transverse shifting of described armored concrete support rail beam base plate, and maintenance passage is provided;
Under described support rail beam roadbed filling and described support rail beam both sides backfill filler collectively form filler filling body, described in fill out Material filling body both sides are provided with the first weathering;
The lower end of every described pile foundation carrying structure sequentially passes through roadbed filling under described support rail beam, described shallow layer reinforcement district Stretching in supporting course with after described soft stratum, with when soft stratum produces sedimentation, described pile foundation carrying structure can be born negative Frictional resistance, thus provide stable bearing capacity to armored concrete support rail beam base plate and reinforced concrete beam type structure, to reduce The adverse effect vertical, the vertical and horizontal rigidity of armored concrete support rail beam produced because of the sedimentation of filler filling body;
One end of described armored concrete support rail beam base plate is overlapped on described bridge abutment, and both are by pin even Connect release longitudinal restraint, and limit lateral displacement;
The both sides of one end that described armored concrete support rail beam base plate is overlapped on described bridge abutment are respectively provided with described end Wall, and the headwall of described every side backfills filler with the support rail beam both sides of respective side respectively and abuts, and protects described support rail for gear Beam both sides backfill filler;
Described trapezoidal filling body is arranged between shallow layer reinforcement district and described armored concrete support rail beam base plate, and it is with described Under support rail beam, roadbed filling abuts near one end of described bridge abutment, for accepting at the bottom of described armored concrete support rail beam Plate, support rail beam both sides backfill filler and headwall;
Described trapezoidal filling body both sides are provided with second weathering consistent with the described first weathering gradient.
Preferably, described pile foundation carrying structure is cast-in-situ bored pile, and joist has just connect with support rail beam base plate or overlapped, with pile foundation Carrying structure just connects.Position joist at support rail beam internode seam uses pin overlap joint with support rail beam base plate, and remaining position uses just Connect.
Preferably, between described line, the cross fall of weathering section is 3%~5%, and head fall is not less than 2 ‰.
Preferably, described support rail beam both sides backfill the height of filler and the height phase of described armored concrete support rail beam base plate Deng.
Preferably, pile foundation carrying structure described in all these is ranks arrangements.
Preferably, described trapezoidal filling body uses graded broken stone to mix cement production systD.
Preferably, described armored concrete support rail beam base plate is overlapped on one end of described bridge abutment and described bridge abutment Between be provided with wear-resisting sliding layer.
Preferably, described pin includes pre-buried connection reinforcing bar, Colophonium hemp cut and rustless steel sleeve pipe, described pre-buried connection reinforcing bar It is positioned at described rustless steel sleeve pipe and described Colophonium hemp cut is set between the two.
In general, by the contemplated above technical scheme of the present invention compared with prior art, it is possible to show under acquirement Benefit effect:
(1) the armored concrete support rail beam base plate of the present invention, reinforced concrete beam type structure all use armored concrete existing Field one-piece casting, the two composition integral reinforced concrete structure is in order to directly take on track load and the magnetic-levitation train of track transmission Load, then deadweight and upper load are passed to pile foundation rigidly connected with it carrying structure, structural reliability is high.
(2) the pile foundation carrying structure of the present invention is goed deep in supporting course, and embankment produces when necessarily settling, and pile foundation carrying structure depends on So can bear negative friction and stronger bearing capacity is provided, it is to avoid that causes because filling compaction quality is wayward is uneven heavy The fall impact on support rail beam vertical and horizontal rigidity, structure vertical cross stiffness is more excellent.
(3) put circuit soft soil zone low, according to embankment stability need the shallow top layer of soft stratum is carried out necessity Reinforcing, its reinforcement depth is by embankment stability control, compared to by settling and stablizing tradition when Two indices controls solely For base reinforcing mode, shallow layer reinforcement district reinforcement depth is little, can effectively control roadbed reclamation and roadbed in conjunction with pile foundation carrying structure Settlement after construction.Non-soft soil zone more can avoid embankment to put the stiffening basic ground of the wide area produced behind slope, and Pile foundation carrying structure construction quality is more easy to control, can effectively control construction quality, investment reduction, reduction of erection time, has significantly Technology and economic advantages.
(4) reinforced concrete supporting beam that pile foundation carrying structure and reinforced concrete floor are arranged, can be greatly reduced pile foundation The stress concentration phenomenon of armored concrete support rail beam base plate at carrying structure;Further, since the lateral connection effect of joist, also increase Add lateral stiffness and the ability of opposing differential settlement deformation of structure, the quantity of transverse pile foundation can have been reduced, reduce investment.
(5) armored concrete support rail beam base plate is overlapped on bridge abutment near one end of elevated bridge, passes through pin Connect, it is to avoid the sedimentation faulting of slab ends that causes because of measures of foundation treatment difference between the two, it is ensured that magnetic float F rail low put circuit with Bridge abutment connected position will not produce faulting of slab ends, effectively realizes magnetic suspension traffic engineering elevated structure and puts line transition section F with low The smoothly transition of rail.
(6) i.e. divide two rows to arrange by framing type setting armored concrete support rail beam base plate, can avoid making at train load It is in multi-direction bending deformation and complex stress condition with lower support rail beam base plate, the support rail beam increasingly complex compared to tradition stress, Framing pile foundation joist type support rail beam can reduce buckling deformation to support rail beam base plate and the impact of top girder structure.
Accompanying drawing explanation
Fig. 1 is the schematic longitudinal section of the present invention;
Fig. 2 is the generalized section in Fig. 1 along I-I line;
Fig. 3 is the generalized section in Fig. 1 along II-II line;
Fig. 4 is the generalized section in Fig. 1 along III-III line;
Fig. 5 is that in the present invention, armored concrete support rail beam base plate is overlapped on the floor map on bridge abutment;
Fig. 6 is that pile foundation joist of the present invention has just connect connection diagram with armored concrete support rail beam base plate.
Fig. 7 is that pile foundation joist of the present invention overlaps connection diagram with armored concrete support rail beam base plate.
Fig. 8 is the cross sectional representation of pin in the present invention.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, right The present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, and It is not used in the restriction present invention.If additionally, technical characteristic involved in each embodiment of invention described below The conflict of not constituting each other just can be mutually combined.
With reference to Fig. 1~Fig. 8, medium-and low-speed maglev two-wire embankment location framing pile foundation joist type support rail girder construction, including pile foundation Carrying structure 3, reinforced concrete supporting beam 90, two placing of reinforcement concrete support rail beam base plate 2, two placing of reinforcement concrete beam-type structure 1, Roadbed filling 5, support rail beam both sides backfill filler 4, bridge abutment 12, trapezoidal filling body 14 and headwall 13 under support rail beam, wherein,
Described pile foundation carrying structure 3 is provided with many, and every described pile foundation carrying structure 3 is all vertically arranged, and every Described reinforced concrete supporting beam 90 is all accepted on the top of described pile foundation carrying structure 3;
Described reinforced concrete supporting beam 90 accepts described armored concrete support rail beam base plate 2;
Reinforced beam described in a corresponding row is accepted on the top often arranging described armored concrete support rail beam base plate 2 respectively Formula structure 1;
The top of described pile foundation carrying structure 3 embeds described reinforced concrete supporting beam 90 and just connects with it, described reinforced concrete Soil joist 90 has just connect with described armored concrete support rail beam base plate 2 or has overlapped, and described armored concrete support rail beam base plate 2 is with described Reinforced concrete beam type structure 1 formed by integrally casting molding thus collectively form armored concrete support rail beam 9;
Filler 21 between support rail beam is set between armored concrete support rail beam base plate 2 described in two rows;
Wired weathering section is set between reinforced concrete beam type structure 1 described in two rows, weathering section tool between described line There are cross fall and head fall, for current being introduced two adjacent sections armored concrete support rail beam base plate 2 internode expansion joint And then current are discharged;Between described line, the cross fall of weathering section is 3%~5%, more preferably 4%, and weathering section between line Head fall not less than 2 ‰, in order to draining.
Described reinforced concrete supporting beam 90 both sides are provided with for limiting the described horizontal position of armored concrete support rail beam base plate 2 The convex gear platform 91 moved;
Under described support rail beam roadbed filling 5 be arranged on shallow layer reinforcement district 6 and described armored concrete support rail beam base plate 2 it Between, carry for for described armored concrete support rail beam base plate 2, reinforced concrete supporting beam 90 and support rail beam both sides backfill filler 4 For operation platform, and provide lateral support for described pile foundation carrying structure 3;Wherein, described shallow layer reinforcement district 6 is arranged on flabbily The shallow top layer of layer 7, and roadbed filling 5 and described reinforced concrete beam type structure under described shallow layer reinforcement district 6, described support rail beam The vertical consistency of 1;
Described support rail beam both sides backfill filler 4 is accepted by roadbed filling 5 under described support rail beam, and described support rail beam two Side backfill filler 4 props up the both sides of described armored concrete support rail beam base plate 2, with to described armored concrete support rail beam base plate 2 Shield and retrain the transverse shifting of described armored concrete support rail beam base plate 2, and maintenance passage is provided;
Under described support rail beam, roadbed filling 5 and described support rail beam both sides backfill filler 4 collectively form filler filling body 10, institute State filler filling body 10 both sides and be provided with weathering 11;
The lower end of every described pile foundation carrying structure 3 sequentially passes through roadbed filling 5, described shallow layer reinforcement under described support rail beam Stretching into behind district 6 and described soft stratum 7 in supporting course 8, with when soft stratum 7 produces sedimentation, described pile foundation carrying structure 3 can Bear negative friction, thus provide stable carrying to armored concrete support rail beam base plate 2 and reinforced concrete beam type structure 1 Power, to reduce because vertical, the vertical and horizontal rigidity of armored concrete support rail beam 9 are produced not by the sedimentation of filler filling body 10 Profit impact;
One end of described armored concrete support rail beam base plate 2 is overlapped on described bridge abutment 12, and both pass through pin Follow closely 15 Connection Release longitudinal restraints, and limit lateral displacement;
The both sides of one end that described armored concrete support rail beam base plate 2 is overlapped on described bridge abutment 12 are respectively provided with described Headwall 13, and the headwall 13 of described every side backfills filler 4 with the support rail beam both sides of respective side respectively and abuts, and protects institute for gear State support rail beam both sides backfill filler 4;
Described trapezoidal filling body 14 is arranged between shallow layer reinforcement district 6 and described armored concrete support rail beam base plate 2, its with Under described support rail beam, roadbed filling 5 abuts near one end of described bridge abutment 12, holds for accepting described armored concrete Beam-and-rail base plate 2, support rail beam both sides backfill filler 4 and headwall 13;
Described trapezoidal filling body 14 both sides are provided with second weathering 17 consistent with described first weathering 11 gradient.
Further, described first pile foundation carrying structure 3 is cast-in-situ bored pile, and joist 90 has just connect with support rail beam 9 base plate 2 or taken Connect, just connect with pile foundation carrying structure 3.Position joist 90 at support rail beam internode seam uses pin 15 to take with support rail beam 9 base plate 2 Connecing, remaining position uses and just connects.
Further, between described line, the cross fall of weathering section is 3%~5%, and head fall is typically no less than 2 ‰.
The height of described support rail beam both sides backfill filler 4 is equal with the height of described armored concrete support rail beam base plate 2, institute These the described first pile foundation carrying structures 3 having are arranged in ranks.
Further, described trapezoidal filling body 14 uses graded broken stone to mix cement production systD, at the bottom of described armored concrete support rail beam Plate 2 is overlapped between one end of described bridge abutment 12 and described bridge abutment 12 and is provided with wear-resisting sliding layer 16, described pin 15 include that pre-buried connection reinforcing bar 15.1, Colophonium hemp cut 15.2 and rustless steel sleeve pipe 15.3, described pre-buried connection reinforcing bar 15.1 are positioned at Described rustless steel sleeve pipe 15.3 is interior and arranges described Colophonium hemp cut 15.2 between the two.
This structural shape can effectively solve in low speed magnetic suspension traffic engineering low to put circuit tight to post-construction settlement of subgrade requirement Lattice, the engineering taking traditional foundation stabilization measure to cause is huge, it is big, long in time limit to invest, and basement process and embankment Construction quality is wayward, bedding long-time stability and the problem of poor durability, thus improves low circuit support rail girder construction of putting Reliability, reduces the engineering risk of traditional structure pattern.
The armored concrete support rail beam 9 of the present invention uses reinforced concrete soil scene one-piece casting, to directly take on track lotus Carry and the magnetic-levitation train load of track transmission, then deadweight and upper load are passed to first pile foundation carrying rigidly connected with it Structure 3, structural reliability is high, can save the large area stiffening basic ground produced after traditional embankment puts slope.
First pile foundation carrying structure 3 uses cast-in-situ bored pile, transverse direction and longitudinal direction to have and is arranged with many reinforced concrete drills Hole pouring pile, vertical and horizontal rigidity is big;And first pile foundation carrying structure 3 go deep into supporting course 8, when soft stratum 7 produces sedimentation, First pile foundation carrying structure 3 still can be born negative friction and be provided stronger bearing capacity to armored concrete support rail beam base plate 2.
Low when putting circuit by soft soil zone, top layer shallow to ground should be needed to carry out necessity add according to embankment stability Gu, form shallow layer reinforcement district 6.The reinforcement depth in shallow layer reinforcement district 6 is by embankment stability control, and its reinforcement depth should be according to embankment Raising, foundation condition are determined by stability calculation.Compared to by settling and stablizing the single ground of tradition when Two indices controls For reinforcing mode, shallow layer reinforcement district 6 reinforcement depth is little, in conjunction with first pile foundation carrying structure 3 can effectively control roadbed reclamation and Post-construction settlement of subgrade.By contrast, this new structure foundation stabilization quantity is little, invests little, and more conducively after construction quality and work The control of sedimentation, and save cost and reduction of erection time.
Armored concrete support rail beam base plate 2 one end of armored concrete support rail beam 9 is overlapped on bridge abutment 12, and the two leads to Cross pin 15 to connect, the most releasable temperature stress of pin 15, it is achieved support rail beam stretches longitudinal, laterally limits support rail beam Displacement, improves the lateral stability of structure.One end of support rail beam overlaps with bridge abutment 12, makes low to put circuit support rail beam and bridge The sedimentation of abutment 12 lap position is consistent, it is to avoid bridge abutment 12 and low putting produce faulting of slab ends sedimentation between circuit support rail girder construction;Low Putting circuit armored concrete support rail beam base plate 2 other end to be embedded in and stable low put in line construction, its sedimentation puts circuit with low Structure is consistent, due to low put line construction through basement process and after filling compacting sedimentation value be in controlled range, therefore, support rail Sedimentation between beam two ends is at bridge abutment 12 and low puts between line construction, close to linear change, it is achieved thereby that overhead Bridge structure and the low sedimentation transition put between line construction, it also avoid faulting of slab ends, the smooth-going of changeover portion scope F rail be effectively ensured Property.
Wear-resisting sliding layer 16 is arranged between armored concrete support rail beam base plate 2 and bridge abutment 12, by resistance to mill sliding The effect of layer 16, can release the rotation that support rail beam is likely to occur under the load action such as relative settlement, temperature to a certain extent Retrain, and the dynamic stress that magnetic-levitation train is transferred to bridge abutment 12 plays cushioning effect, it also avoid support rail beam and bridge abutment Abrasion and stress between 12 are concentrated and are caused the partial pressing of structure to destroy.
Adjacent armored concrete support rail beam base plate 2 shares pile foundation joist composite bearing structure, and at adjacent reinforcing bar Reserved expansion joint between concrete support rail beam base plate 2, can avoid the section of encorbelmenting by the impact failure of train load, and reduce temperature should Power and the impact of shrinkage and creep.
The reinforced concrete supporting beam 90 that pile foundation carrying structure 3 and reinforced concrete floor 2 are arranged, can be greatly reduced pile foundation The stress concentration phenomenon of armored concrete support rail beam base plate 2 at carrying structure;Further, since the lateral connection effect of joist 90, Too increase lateral stiffness and the ability of opposing differential settlement deformation of structure, the quantity of transverse pile foundation can be reduced, reduce and throw Money.
Being arranged by framing type by armored concrete support rail beam base plate 2 i.e. divides two rows to arrange, and can avoid at High-speed Train Loads Lower support rail beam base plate 2 is in multi-direction bending deformation and complex stress condition, the support rail beam increasingly complex compared to tradition stress, point Width pile foundation joist type support rail beam can reduce buckling deformation to support rail beam base plate 2 and the impact of top girder structure 1.
The making step that the present invention is concrete is as follows:
(1) construction overhead bridge structure abutment, pours bridge abutment body concrete, abutment of constructing, and backfills abutment foundation foundation ditch; The location of pin should be performed before abutment concreting and bury work underground;
(2) low after smooth platform put construction site, circuit location, require according to design to carry out at the shallow layer foundation reinforcing of necessity Reason, after basement process completes, low after filling platform by changeover portion design requirement puts under circuit support rail beam geotechnique basis, platform consequence beam-and-rail Lower geotechnique basis filling construction Tong Bu with abutment cone.According to each position wire feeding and compaction requirement, changeover portion when filling Scope is synchronous layered with non-changeover portion district fills, and next layer fills and fills last layer after detection meets the requirements again, until reinforcing bar mixes At the absolute altitude of solidifying soil support rail beam base plate bottom surface;
(3) it is in embankment subgrade cross section, the perfusion of vertical section direction construction drill at reinforced concrete floor bottom surface absolute altitude Stake, the i.e. first pile foundation carrying structure 3, drilled pile construction should use the construction technology little to railway embankment disturbance, exist if desired Steel pile casting is set in embankment altitude range or draws hole;After cast-in-situ bored pile reaches desired strength, amputate by code requirement Pile crown, colligation concrete floor and the connection reinforcing bar with stake;
(4) according to design attitude to reinforced concrete supporting beam 90, convex gear platform 91 formwork erection, one-time-concreting molding, before pouring Carry out all kinds of built-in fitting such as pin 10 and with pile foundation connect the location of reinforcing bar and installation, concrete is removed after reaching design strength Template;
(5) laying high-strength wearable sliding layer it is on abutment at armored concrete support rail beam with abutment overlap joint, according to design Joint is long to armored concrete support rail beam base plate 2 and reinforced concrete beam type structure 1 merogenesis formwork erection, and each parts concrete reaches design Difference form removal after intensity, intilted weathering and longitudinal drainage slope are made in the face that backfills between reinforced concrete beam type structure And it is waterproof to carry out top layer by design requirement, one-time-concreting molding, carry out all kinds of built-in fitting such as pin, the connection of sleeper pedestal before pouring The location of reinforcing bar, water conservancy diversion rail bearing built-in fitting etc. and installation;
(6) constructing and low put both sides, circuit bridge abutment 12 joint headwall 13, headwall 13 uses concrete one-piece casting to execute Work, waits headwall 13 concrete to reach form removal after design strength, then puts circuit graded broken stone top by design requirement construction is low The backfill layer in face, confining bed, associated satellite structures, by design and construction bridge abutment 12 cone end face confining bed etc., limit of constructing Slope protection, drainage system etc..
(7) carry out low circuit and the elevated structure section of track put to lay and the installation of associated satellite engineering and construction, construct complete After.
As it will be easily appreciated by one skilled in the art that and the foregoing is only presently preferred embodiments of the present invention, not in order to Limit the present invention, all any amendment, equivalent and improvement etc. made within the spirit and principles in the present invention, all should comprise Within protection scope of the present invention.

Claims (9)

1. medium-and low-speed maglev two-wire embankment location pile foundation joist framing type support rail beam transition section structure, it is characterised in that include stake Base carries structure, two placing of reinforcement concrete support rail beam base plates, reinforced concrete supporting beam, two placing of reinforcement concrete beam-type structures, holds Roadbed filling, support rail beam both sides backfill filler, bridge abutment, trapezoidal filling body and headwall under beam-and-rail, wherein,
Described pile foundation carrying structure is provided with many, and every described pile foundation carrying structure is all vertically arranged, and every described stake Described reinforced concrete supporting beam is all accepted on the top of base carrying structure;
Reinforced concrete beam type knot described in a corresponding row is accepted at the top often arranging described armored concrete support rail beam base plate respectively Structure;
Described reinforced concrete beam type structure is accepted at the top of described armored concrete support rail beam base plate;
Described pile foundation carrying structure top embed described reinforced concrete supporting beam just connect with it, described reinforced concrete supporting beam and Described armored concrete support rail beam base plate has just connect or has overlapped, described armored concrete support rail beam base plate and described reinforced beam Formula structural integrity pours molding thus collectively forms armored concrete support rail beam;
Described in two rows, between armored concrete support rail beam base plate, filler between support rail beam is set;
Described reinforced concrete supporting beam both sides are provided with for limiting the convex of described armored concrete support rail beam base plate lateral displacement Type gear platform;
Arranging wired weathering section described in two rows between reinforced concrete beam type structure, between described line, weathering section has laterally The gradient and head fall, for current introducing two adjacent sections armored concrete support rail beam base plate internode expansion joint and then by water Stream is discharged;
Under described support rail beam, roadbed filling is arranged between shallow layer reinforcement district and described armored concrete support rail beam base plate, for Operation platform is provided for described armored concrete support rail beam base plate, reinforced concrete supporting beam and support rail beam both sides backfill filler, and Lateral support is provided for described pile foundation carrying structure;Wherein, described shallow layer reinforcement district is arranged on the shallow top layer of soft stratum, and Roadbed filling and the vertical consistency of described reinforced concrete beam type structure under described shallow layer reinforcement district, described support rail beam;
Described support rail beam both sides backfill filler is accepted by roadbed filling under described support rail beam, and the backfill of described support rail beam both sides Filler props up the both sides of described armored concrete support rail beam base plate, to shield described armored concrete support rail beam base plate And retrain the transverse shifting of described armored concrete support rail beam base plate, and provide maintenance passage;
Under described support rail beam, roadbed filling and described support rail beam both sides backfill filler collectively form filler filling body, and described filler is filled out The first weathering it is provided with in building body;
The lower end of every described pile foundation carrying structure sequentially passes through roadbed filling under described support rail beam, described shallow layer reinforcement district and institute Stretching into after stating soft stratum in supporting course, with when soft stratum produces sedimentation, described pile foundation carrying structure can bear negative frictional resistance Power, thus provide stable bearing capacity to armored concrete support rail beam base plate and reinforced concrete beam type structure, to reduce because filling out The adverse effect that vertical, the vertical and horizontal rigidity of armored concrete support rail beam are produced by the sedimentation of material filling body;
One end of described armored concrete support rail beam base plate is overlapped on described bridge abutment, and both are released by pin connection Put longitudinal restraint, and limit lateral displacement;
The both sides of one end that described armored concrete support rail beam base plate is overlapped on described bridge abutment are respectively provided with described headwall, and And the headwall of described every side backfills filler with the support rail beam both sides of respective side respectively and abuts, protect described support rail beam both sides for gear Backfill filler;
Described trapezoidal filling body is arranged between shallow layer reinforcement district and described armored concrete support rail beam base plate, itself and described support rail Under beam, roadbed filling abuts near one end of described bridge abutment, for accepting described armored concrete support rail beam base plate, holding Beam-and-rail both sides backfill filler and headwall;
Described trapezoidal filling body both sides are provided with second weathering consistent with the described first weathering gradient.
Medium-and low-speed maglev two-wire embankment location the most according to claim 1 pile foundation joist framing type support rail beam changeover portion knot Structure, it is characterised in that described pile foundation carrying structure is that cast-in-situ bored pile joist has just connect with support rail beam base plate or overlapped, and holds with pile foundation Carry structure just to connect.
Medium-and low-speed maglev two-wire embankment location the most according to claim 1 pile foundation joist framing type support rail beam changeover portion knot Structure, it is characterised in that position joist and support rail beam base plate at support rail beam internode seam use pin overlap joint, and remaining position uses just Connect.
Medium-and low-speed maglev two-wire embankment location the most according to claim 1 pile foundation joist framing type support rail beam changeover portion knot Structure, it is characterised in that the height of described support rail beam both sides backfill filler and the height phase of described armored concrete support rail beam base plate Deng.
Medium-and low-speed maglev two-wire embankment location the most according to claim 1 pile foundation joist framing type support rail beam changeover portion knot Structure, it is characterised in that pile foundation carrying structure described in all these is ranks arrangements.
Torr medium-and low-speed maglev two-wire embankment location the most according to claim 1 pile foundation joist framing type support rail beam changeover portion knot Structure, it is characterised in that between described line, the cross fall of weathering section is 3%~5%, head fall is not less than 2 ‰.
Medium-and low-speed maglev two-wire embankment location the most according to claim 1 pile foundation joist framing type support rail beam changeover portion knot Structure, it is characterised in that described trapezoidal filling body uses graded broken stone to mix cement production systD.
Medium-and low-speed maglev two-wire embankment location the most according to claim 1 pile foundation joist framing type support rail beam changeover portion knot Structure, it is characterised in that described armored concrete support rail beam base plate is overlapped on one end of described bridge abutment and described bridge abutment Between be provided with wear-resisting sliding layer.
Medium-and low-speed maglev two-wire embankment location the most according to claim 1 pile foundation joist framing type support rail beam changeover portion knot Structure, it is characterised in that described pin includes pre-buried connection reinforcing bar, Colophonium hemp cut and rustless steel sleeve pipe, described pre-buried connection reinforcing bar It is positioned at described rustless steel sleeve pipe and described Colophonium hemp cut is set between the two.
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