CN106283945B - Medium-and low-speed maglev traffic engineering two-wire excavation location pile foundation combined type support rail girder construction - Google Patents
Medium-and low-speed maglev traffic engineering two-wire excavation location pile foundation combined type support rail girder construction Download PDFInfo
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- CN106283945B CN106283945B CN201610824959.6A CN201610824959A CN106283945B CN 106283945 B CN106283945 B CN 106283945B CN 201610824959 A CN201610824959 A CN 201610824959A CN 106283945 B CN106283945 B CN 106283945B
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- 238000010276 construction Methods 0.000 title claims abstract description 43
- 238000009412 basement excavation Methods 0.000 title claims abstract description 14
- 239000004567 concrete Substances 0.000 claims abstract description 95
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 54
- 239000000945 filler Substances 0.000 claims abstract description 24
- 239000002131 composite material Substances 0.000 claims abstract description 20
- 230000002787 reinforcement Effects 0.000 claims abstract description 14
- 230000003014 reinforcing effect Effects 0.000 claims description 17
- 244000025254 Cannabis sativa Species 0.000 claims description 6
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 claims description 6
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- 239000010935 stainless steel Substances 0.000 claims description 6
- 238000011065 in-situ storage Methods 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- 239000000725 suspension Substances 0.000 abstract description 14
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000013461 design Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 230000006641 stabilisation Effects 0.000 description 4
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- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2/00—General structure of permanent way
- E01B2/006—Deep foundation of tracks
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2204/00—Characteristics of the track and its foundations
- E01B2204/08—Deep or vertical foundation
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- Life Sciences & Earth Sciences (AREA)
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Abstract
Line technology field is put the invention belongs to middle low speed magnetic suspension traffic engineering is low, and disclose medium-and low-speed maglev traffic engineering two-wire excavation location pile foundation combined type support rail girder construction, filler is backfilled including the first pile foundation bearing structure, pile foundation joist composite bearing structure, two placing of reinforcement concrete support rail beam bottom plates, two placing of reinforcement concrete beam-type structures and support rail beam both sides, the first pile foundation bearing structure is provided with more, and the armored concrete support rail beam bottom plate is accepted on the top of the every first pile foundation bearing structure；Accept the reinforced concrete beam type structure in the top of the armored concrete support rail beam bottom plate；Gutter is provided with by the support rail beam both sides backfill filler, weathering is set on the gutter.The requirement that low speed magnetic suspension traffic engineering track structure deforms to support rail girder construction during the present invention can meet and settlement after construction is high, and can meets the requirement of bedding long-time stability, durability and construction quality controllability, and economy is more preferably.
Description
Technical field
Line technology field is put the invention belongs to middle low speed magnetic suspension traffic engineering is low, more particularly, to middle low speed magnetic
Floating traffic engineering two-wire excavation location support rail girder construction 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
The circuit for opening operation is even more minority.The middle low speed magnetic suspension railway business that only in March, 2005, Japan's construction was opened at present is transported
The middle low speed magnetic suspension railway business operating line that line-the East Hillside Line and in June, 2014, South Korea opened.And the middle low speed of China
Magnetic suspension traffic only has 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 based on elevated structure, it is rarely seen about the low research and application put in terms of circuit support rail girder construction.
Middle low speed magnetic suspension hang traffic civil engineering part mainly comprising bridge, it is low put circuit, station and rolling stock section, it is low to put circuit
It is made up of roadbed under the section of track, support rail beam and support rail beam, the support rail beam of supporting track is arranged on the roadbed being made up of earth structure
On, the operation of middle low speed magnetic suspension train includes suspending, be oriented to, drive and braking being required for what is completed on support rail beam.Magnetic
Aerotrain is very high to line construction deformation requirements, because the deformation of structure very little may influence comfortableness even prestige by bus
Traffic safety is coerced, so the design of support rail beam is particularly significant.
Existing support rail girder construction is applied has problems with middle low speed magnetic suspension traffic low put on circuit：
(1) existing low circuit support rail girder construction of putting is arranged on roadbed earth structure, roadbed earth structure by
Filler fills compacting and formed, and compaction quality is difficult to control, and the later stage easily deforms, and influences the integral rigidity of structure, and after work
Sedimentation is unmanageable.
(2) the low settlement after construction requirement for putting circuit support rail girder construction to roadbed and ground is high, and is routed through the ground in region
Matter condition is typically all complicated and changeable, is difficult to control using the support rail beam structure construction quality of routine.
(3) there is vulnerability because filler fills the low circuit earth structure of putting for being compacted form, and construction quality is not easy
Control, relatively easily produces differential settlement, causes bedding vertical and horizontal bad stability under support rail beam, so that support rail beam
The resistance to overturning of structure is damaged.
The low circuit support rail beam of putting of magnetic suspension is higher to post-construction settlement of subgrade, bedding long-time stability and life requirement, when
When circuit is located at foundation stabilization location, traditional support rail girder construction pattern is taken construction period length to be present, construction quality is not easily-controllable
System, the defects of whole structural stability is poor and less economical.
The content of the invention
For the disadvantages described above or Improvement requirement of prior art, the invention provides the digging of medium-and low-speed maglev traffic engineering two-wire
Square location pile foundation combined type support rail girder construction, traditional low the defects of putting circuit support rail girder construction can be avoided, construction quality is easier
Control, long-time stability are more preferable, and its both meet in low speed magnetic suspension traffic engineering track structure to support rail girder construction deform
The high requirement with settlement after construction, meets the requirement of bedding long-time stability, durability and construction quality controllability again.
To achieve the above object, it is proposed, according to the invention, provide medium-and low-speed maglev traffic engineering two-wire excavation location pile foundation and answer
Box-like support rail girder construction, it is characterised in that including the first pile foundation bearing structure, pile foundation joist composite bearing structure, two placing of reinforcements
Concrete support rail beam bottom plate, two placing of reinforcement concrete beam-type structures and support rail beam both sides backfill filler, wherein,
The first pile foundation bearing structure and the pile foundation joist composite bearing structure accept the armored concrete jointly
Support rail beam bottom plate；
The first pile foundation bearing structure is provided with more, and the every first pile foundation bearing structure is vertically arranged, and
And the armored concrete support rail beam bottom plate is accepted on the top of the every first pile foundation bearing structure, first pile foundation is held
The top for carrying structure is embedded in the armored concrete support rail beam bottom plate and its rigid connection；
Accept the reinforced concrete beam type structure, and the reinforcing bar in the top of the armored concrete support rail beam bottom plate
Concrete support rail beam bottom plate and the reinforced concrete beam type structural integrity pouring molding, hold so as to collectively form armored concrete
Beam-and-rail；
Per in placing of reinforcement concrete support rail beam bottom plate, section is set between adjacent two pieces of armored concrete support rail beam bottom plates
Between expansion joint；
The pile foundation joist composite bearing structure setting has the two multiple and adjacent section armored concrete support rail beams
The pile foundation joist composite bearing structure is respectively provided with the internode expansion joint of bottom plate, for supporting this two adjacent section steel
Reinforced concrete support rail beam bottom plate, each pile foundation joist composite bearing structure include reinforced concrete supporting beam and the second pile foundation
Bearing structure, and the reinforced concrete supporting beam, the reinforcing bar are accepted in the top of the every second pile foundation bearing structure
Concrete joist accepts the armored concrete support rail beam bottom plate；
The top of the second pile foundation bearing structure is embedded in the reinforced concrete supporting beam and its rigid connection, the reinforced concrete
Native joist and the armored concrete support rail beam bottom plate rigid connection or overlap joint；
The reinforced concrete supporting beam both sides are provided with for limiting the armored concrete support rail beam bottom plate lateral displacement
Convex block machine；
Wired weathering section be set between reinforced concrete beam type structure described in two rows, and weathering section has between the line
Cross fall and head fall, enter for current to be introduced to the internode expansion joint of two adjacent sections armored concrete support rail beam bottom plate
And current are discharged；
The support rail beam both sides backfill filler is arranged on soft stratum, and by support rail beam both sides backfill filler
Gutter is provided with, side of the gutter away from support rail beam both sides backfill filler is provided with weathering；
The armored concrete support rail beam bottom plate is located in support rail beam both sides backfill filler；
The lower end of the every first pile foundation bearing structure is stretched into supporting course after passing through the soft stratum, with weakness
When stratum produces sedimentation, the first pile foundation bearing structure can bear negative friction, so as to reinforcing bar armored concrete support rail beam
Stable bearing capacity is provided, the differential settlement to prevent support rail beam both sides backfill filler reduces the perpendicular of armored concrete support rail beam
To, vertical and horizontal rigidity.
Preferably, the first pile foundation bearing structure is cast-in-situ bored pile, and reinforced concrete supporting beam is held with armored concrete
Beam-and-rail bottom plate rigid connection or overlap joint, with the second pile foundation bearing structure rigid connection.
Preferably, in the position reinforced concrete supporting beam and armored concrete at the internode expansion joint of armored concrete support rail beam
Support rail beam bottom plate is overlapped using pin, and remaining position uses rigid connection or overlap joint.
Preferably, all these described first pile foundation bearing structures are arranged in ranks.
Preferably, the lower end of the every second pile foundation bearing structure sequentially passes through roadbed filling under the support rail beam, shallow
Stretched into after layer stabilization zone and the soft stratum in supporting course.
Preferably, the cross fall of weathering section is 3%~5% between the line, and head fall is not less than 2 ‰.
Preferably, the pin includes pre-buried connection reinforcing bar, pitch hemp cut and stainless steel sleeve pipe, the pre-buried connection reinforcing bar
The pitch hemp cut is set in the stainless steel sleeve pipe and between the two.
In general, by the contemplated above technical scheme of the present invention compared with prior art, it can obtain down and show
Beneficial effect：
(1) armored concrete support rail beam bottom plate of the invention, reinforced concrete beam type structure are showed using armored concrete
Field one-piece casting, the two forms integral reinforced concrete structure to directly take on the magnetic-levitation train of track load and track transmission
Load, then deadweight and upper load are passed to and its rigidly connected first pile foundation bearing structure, structural reliability height.
(2) the first pile foundation bearing structure of the invention is goed deep into supporting course, and when roadbed produces certain sedimentation, the first pile foundation is held
Can still negative friction be born and provide stronger bearing capacity by carrying structure, be avoided caused by foundation stabilization quality is whard to control
Vertical to support rail beam, vertical and horizontal rigidity influence is settled, structure vertical cross stiffness is more excellent.
(3) the first pile foundation bearing structure control settlement effect of the invention is preferable, therefore can reduce cutting bedding and change and fill out thickness
Degree, need to only meet the requirement of basic replacement thickness, can investment reduction, shorten the duration, there are obvious technology and economic advantages.
(4) while by two placing of reinforcement concrete beam-type structures of two-wire by armored concrete support rail beam floor combination one
Rise, the lateral stiffness of reinforced concrete beam type structure can be effectively increased, left and right two is saved reinforced concrete beam type structure and be placed in
On rigidity identical armored concrete support rail beam bottom plate, the lateral stability of reinforced concrete beam type structure can be effectively increased,
The relative settlement between reinforced concrete beam type structure is controlled, is also beneficial to maintenance and maintenance during operation, measure is simple, easily applies
Work, cost save, effect is good.
(5) reinforced concrete supporting beam that pile foundation bearing structure and armored concrete support rail beam bottom plate are set, can subtract significantly
The stress concentration phenomenon of armored concrete support rail beam bottom plate at small pile foundation bearing structure；Further, since the lateral connection of joist is made
With also increasing the lateral stiffness of structure and the ability of resistance differential settlement deformation, the quantity of transverse pile foundation can be reduced, reduced
Investment.
(6) adjacent armored concrete support rail beam bottom plate shares pile foundation joist composite bearing structure, and in adjacent steel
Internode expansion joint is reserved between reinforced concrete support rail beam bottom plate, impact failure of the section by train load of encorbelmenting can be avoided, and reduce
The influence of temperature stress and shrinkage and creep.
Brief description of the drawings
Fig. 1 is the schematic longitudinal section of the present invention；
Fig. 2 is along the profile of I-I line in Fig. 1；
Fig. 3 is along the profile of II-II line in Fig. 1；
Fig. 4 is the plane distribution schematic diagram of the first pile foundation bearing structure and pile foundation joist composite bearing structure in the present invention；
Fig. 5 is the connection signal of armored concrete support rail beam bottom plate and the first pile foundation bearing structure in the present invention.
Fig. 6 is pile foundation joist of the present invention and armored concrete support rail beam bottom plate rigid connection connection diagram.
Fig. 7 is pile foundation joist of the present invention and armored concrete support rail beam bottom plate overlap joint connection diagram.
Fig. 8 is the cross-sectional view of pin in the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in each embodiment of invention described below
Conflict can is not formed each other to be mutually combined.
1~Fig. 8 of reference picture, medium-and low-speed maglev traffic engineering two-wire excavation ground stage composite support rail girder construction, including first
Pile foundation bearing structure 3, pile foundation joist composite bearing structure 90, two placing of reinforcement concrete support rail beam bottom plates 2, two placing of reinforcement concrete
Girder structure 1 and support rail beam both sides backfill filler 4, wherein,
The first pile foundation bearing structure 3 and the pile foundation joist composite bearing structure 90 accept the reinforced concrete jointly
Native support rail beam bottom plate 2；
The first pile foundation bearing structure 3 is provided with more, and the every first pile foundation bearing structure 3 is vertically arranged,
And the armored concrete support rail beam bottom plate 2 is accepted on the top of the every first pile foundation bearing structure 3, described first
The top of base bearing structure 3 is embedded in the armored concrete support rail beam bottom plate 2 and its rigid connection；
Accept the reinforced concrete beam type structure 1, and the steel in the top of the armored concrete support rail beam bottom plate 2
Reinforced concrete support rail beam bottom plate 2 is molded with the formed by integrally casting of reinforced concrete beam type structure 1, so as to collectively form reinforced concrete
Native support rail beam 9；
Per in placing of reinforcement concrete support rail beam bottom plate 2, set between armored concrete support rail beam bottom plate 2 described in two adjacent sections
Internode expansion joint；
The pile foundation joist composite bearing structure 90 is provided with the two multiple and adjacent section armored concrete support rails
The pile foundation joist composite bearing structure 90 is respectively provided with the internode expansion joint of beam bottom plate 2, for supporting this two adjacent section
The armored concrete support rail beam bottom plate 2, each pile foundation joist composite bearing structure 90 include reinforced concrete supporting beam
901 and the second pile foundation bearing structure 902, and the reinforcing bar is accepted on the top of the every second pile foundation bearing structure 902
Concrete joist 901, the reinforced concrete supporting beam 901 accept the armored concrete support rail beam bottom plate 2；
The top of the second pile foundation bearing structure 3 is embedded in the reinforced concrete supporting beam 901 and its rigid connection, the reinforcing bar
Concrete joist 901 and the rigid connection of armored concrete support rail beam bottom plate 2 or overlap joint；
The both sides of reinforced concrete supporting beam 901 are provided with for limiting the armored concrete support rail beam bottom plate 2 laterally
The convex block machine 91 of displacement；
Wired weathering section be set between reinforced concrete beam type structure 1 described in two rows, and weathering section has between the line
There are cross fall and head fall, for current are introduced into the internode expansion joint of two adjacent sections armored concrete support rail beam bottom plate 2
And then current are discharged；The cross fall of weathering section is 3%~5%, more preferably 4% between the line, weathering section between line
Head fall be not less than 2 ‰, in order to draining.
The support rail beam both sides backfill filler 4 is arranged on soft stratum 5, and backfills filler in the support rail beam both sides
Gutter 7 is provided with by the of 4, side of the gutter 7 away from support rail beam both sides backfill filler 4 is provided with weathering 8；
The armored concrete support rail beam bottom plate 2 is located in support rail beam both sides backfill filler 4；
The lower end of the every first pile foundation bearing structure 3 pass through the soft stratum 5 after stretch into supporting course 6, with
When soft stratum 5 produces sedimentation, the first pile foundation bearing structure 3 can bear negative friction, so as to reinforcing bar armored concrete
Support rail beam 9 provides stable bearing capacity, and the differential settlement to prevent support rail beam both sides backfill filler 4 reduces armored concrete support rail
Vertical, the vertical and horizontal rigidity of beam 9.
Further, the first pile foundation bearing structure 3 is cast-in-situ bored pile, reinforced concrete supporting beam 901 and reinforced concrete
Native support rail beam bottom plate rigid connection or overlap joint, with the rigid connection of the second pile foundation bearing structure 902.Stretched in the internode of armored concrete support rail beam
The position reinforced concrete supporting beam 901 of seam is overlapped with armored concrete support rail beam bottom plate using pin, and remaining position uses rigid connection
Or overlap joint.
The pin 10 includes pre-buried connection reinforcing bar 10.1, pitch hemp cut 10.2 and stainless steel sleeve pipe 10.3, described pre-buried
Connection reinforcing bar 10.1 is located in the stainless steel sleeve pipe 10.3 and sets the pitch hemp cut 10.2 between the two.
All these described first pile foundation bearing structures 3 are arranged in ranks.
The low circuit of putting of low speed magnetic suspension traffic engineering is tight to post-construction settlement of subgrade requirement during the structural shape can be solved effectively
Lattice, taking traditional cutting to excavate, replacement thickness engineering caused greatly is huge, investment is big, long in time limit, and backfill filler construction
Quality is whard to control, bedding long-time stability and the problem of poor durability, and low the reliable of circuit support rail girder construction is put so as to improve
Degree, reduce engineering risk.
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 will deadweight and upper load passes to and its rigidly connected first pile foundation carries
Structure 3, structural reliability is high, can save the foundation stabilization of cutting bedding and reduce cutting bedding replacement thickness, need to only meet basic
The requirement of replacement thickness, can investment reduction, shorten the duration, there are obvious technology and economic advantages.
First pile foundation bearing structure 3 uses cast-in-situ bored pile, and transverse direction and longitudinal direction, which has, is arranged with more reinforced concrete drills
Hole pouring pile, vertical and horizontal rigidity are big；And first pile foundation bearing structure 3 go deep into supporting course 6, when soft stratum 5 produces sedimentation,
Pile foundation carrying knot can still bear negative friction and provide stronger bearing capacity to armored concrete support rail beam bottom plate 2.
The reinforced concrete supporting beam 901 that pile foundation bearing structure 3 and armored concrete support rail beam bottom plate 2 are set, can be significantly
Reduce the stress concentration phenomenon of armored concrete support rail beam bottom plate 2 at pile foundation bearing structure 3；Further, since armored concrete support
The lateral connection effect of beam 901, the lateral stiffness of structure and the ability of resistance differential settlement deformation are also increased, horizontal stroke can be reduced
To the quantity of pile foundation, investment is reduced.
The internode of adjacent segments armored concrete support rail beam bottom plate 2 shares pile foundation joist composite bearing structure, and adjacent
Internode expansion joint is reserved between armored concrete support rail beam bottom plate, impact failure of the section by train load of encorbelmenting can be avoided, and subtract
The influence of small temperature stress and shrinkage and creep.
Simultaneously by two placing of reinforcement concrete beam-type structures of two-wire by armored concrete support rail beam floor combination together,
The lateral stiffness of reinforced concrete beam type structure can be effectively increased, left and right two is saved reinforced concrete beam type structure and is placed in rigidity
On identical armored concrete support rail beam bottom plate, the lateral stability of reinforced concrete beam type structure can be effectively increased, is controlled
Relative settlement between reinforced concrete beam type structure, is also beneficial to maintenance and maintenance during operation, measure is simple, easily construction,
Cost saves, effect is good.
Specific making step of the invention is as follows：
(1) excavating cut slope side slope is changed according to the necessary bedding of design requirement progress and filled out to designing at road bed absolute altitude；
(2) in armored concrete support rail beam bottom plate bottom surface, absolute altitude is in subgrade cross section, vertical section direction construction drill fills
Stake, i.e. the first pile foundation bearing structure 3 are noted, drilled pile construction should use the construction technology small to filling roadbed disturbance；Drilling
After bored concrete pile reaches desired strength, pile crown, assembling reinforcement concrete support rail beam bottom plate and the connection with stake are amputated by code requirement
Reinforcing bar；
(3) according to design attitude to reinforced concrete supporting beam 901, the formwork erection of convex block machine 91, one-time-concreting shaping, before pouring
Carry out all kinds of built-in fittings such as pin 10 and positioning and installation with the connection reinforcing bar of pile foundation, concrete are removed after reaching design strength
Template；
(4) grown according to design section to armored concrete support rail beam bottom plate 2 and the merogenesis formwork erection of reinforced concrete beam type structure 1,
Face is backfilled between reinforced concrete beam type structure to make intilted weathering and carry out top layer waterproof by design requirement, is once poured
Type is built up, the positioning of all kinds of built-in fittings such as pin 10, sleeper pedestal connection reinforcing bar, water conservancy diversion rail bearing built-in fitting etc. is carried out before pouring
With installation；
(5) each part concrete distinguishes form removal after reaching design strength, then by armored concrete support rail beam bottom plate 2
Bedding filler backfills in thickness range, and backfill face makes outward-dipping weathering 8, top layer waterproof is carried out by design requirement, and
Weathering 8 on gutter 7 and gutter 7 is carried out, that is, is formed and a kind of be used for middle low speed magnetic suspension traffic engineering low to put circuit double
Line excavation location pile foundation combined type support rail girder construction.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, all any modification, equivalent and improvement made within the spirit and principles of the invention etc., all should be included
Within protection scope of the present invention.
Claims (7)
1. medium-and low-speed maglev traffic engineering two-wire excavation location pile foundation combined type support rail girder construction, it is characterised in that including first
Pile foundation bearing structure, pile foundation joist composite bearing structure, two placing of reinforcement concrete support rail beam bottom plates, two placing of reinforcement concrete beam-types
Structure and support rail beam both sides backfill filler, wherein,
The first pile foundation bearing structure and the pile foundation joist composite bearing structure accept the armored concrete support rail jointly
Beam bottom plate；
The first pile foundation bearing structure is provided with more, and the every first pile foundation bearing structure is vertically arranged, and often
Accept the armored concrete support rail beam bottom plate, the first pile foundation carrying knot in the top of first pile foundation bearing structure described in root
The top of structure is embedded in the armored concrete support rail beam bottom plate and its rigid connection；
Accept the reinforced concrete beam type structure, and the reinforced concrete in the top of the armored concrete support rail beam bottom plate
Native support rail beam bottom plate and the reinforced concrete beam type structural integrity pouring molding, so as to collectively form armored concrete support rail
Beam；
Per in placing of reinforcement concrete support rail beam bottom plate, internode is set to stretch between adjacent two pieces of armored concrete support rail beam bottom plates
Contracting seam；
The pile foundation joist composite bearing structure setting has the two multiple and adjacent section armored concrete support rail beam bottom plates
Internode expansion joint at be respectively provided with the pile foundation joist composite bearing structure, for supporting this described reinforcing bar of adjacent two section to mix
Native support rail beam bottom plate is coagulated, each pile foundation joist composite bearing structure includes reinforced concrete supporting beam and the second pile foundation carries
Structure, and the reinforced concrete supporting beam, the reinforced concrete are accepted in the top of the every second pile foundation bearing structure
Native joist accepts the armored concrete support rail beam bottom plate；
The top of the second pile foundation bearing structure is embedded in the reinforced concrete supporting beam and its rigid connection, the armored concrete support
Beam and the armored concrete support rail beam bottom plate rigid connection or overlap joint；
The reinforced concrete supporting beam both sides are provided with for limiting the convex of the armored concrete support rail beam bottom plate lateral displacement
Type block machine；
Wired weathering section be set between reinforced concrete beam type structure described in two rows, and weathering section has laterally between the line
The gradient and head fall, for current to be introduced to the internode expansion joint of two adjacent sections armored concrete support rail beam bottom plate and then are incited somebody to action
Current are discharged；
The support rail beam both sides backfill filler is arranged on soft stratum, and is set by support rail beam both sides backfill filler
There is gutter, side of the gutter away from support rail beam both sides backfill filler is provided with weathering；
The armored concrete support rail beam bottom plate is located in support rail beam both sides backfill filler；
The lower end of the every first pile foundation bearing structure is stretched into supporting course after passing through the soft stratum, with soft stratum
When producing sedimentation, the first pile foundation bearing structure can bear negative friction, so as to be provided to reinforcing bar armored concrete support rail beam
Stable bearing capacity, the differential settlement to prevent support rail beam both sides backfill filler reduce the vertical, vertical of armored concrete support rail beam
To and lateral stiffness.
2. pile foundation combined type support rail girder construction in medium-and low-speed maglev traffic engineering two-wire excavation location according to claim 1,
Characterized in that, the first pile foundation bearing structure is cast-in-situ bored pile, reinforced concrete supporting beam and armored concrete support rail beam
Bottom plate rigid connection or overlap joint, with the second pile foundation bearing structure rigid connection.
3. pile foundation combined type support rail girder construction in medium-and low-speed maglev traffic engineering two-wire excavation location according to claim 1,
Characterized in that, position reinforced concrete supporting beam and armored concrete support rail at the internode expansion joint of armored concrete support rail beam
Beam bottom plate is overlapped using pin, and remaining position uses rigid connection or overlap joint.
4. pile foundation combined type support rail girder construction in medium-and low-speed maglev traffic engineering two-wire excavation location according to claim 1,
Characterized in that, all these described first pile foundation bearing structures are arranged in ranks.
5. pile foundation combined type support rail girder construction in medium-and low-speed maglev traffic engineering two-wire excavation location according to claim 1,
Add characterized in that, the lower end of the every second pile foundation bearing structure sequentially passes through roadbed filling, shallow-layer under the support rail beam
Stretched into after Gu Qu and the soft stratum in supporting course.
6. pile foundation combined type support rail girder construction in medium-and low-speed maglev traffic engineering two-wire excavation location according to claim 1,
Characterized in that, the cross fall of weathering section is 3%~5% between the line, head fall is not less than 2 ‰.
7. pile foundation combined type support rail girder construction in medium-and low-speed maglev traffic engineering two-wire excavation location according to claim 3,
Characterized in that, the pin includes pre-buried connection reinforcing bar, pitch hemp cut and stainless steel sleeve pipe, the pre-buried connection reinforcing bar is located at
The pitch hemp cut is set in the stainless steel sleeve pipe and between the two.
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| CN104452483B (en) * | 2014-12-09 | 2016-08-17 | 中铁第四勘察设计院集团有限公司 | Middle low speed magnetic suspension traffic engineering is low puts route curve support rail girder construction |
| CN205474628U (en) * | 2016-01-21 | 2016-08-17 | 中铁第四勘察设计院集团有限公司 | Low circuit and overpass changeover portion structure of putting of well low -speed maglev traffic engineering support rail roof beam |
| CN105821725A (en) * | 2016-04-29 | 2016-08-03 | 中铁第四勘察设计院集团有限公司 | Intra-segment limit structure for bearing-trail beams at double-line section of middle-low speed magnetic levitation traffic engineering low-laying line |
| CN206157480U (en) * | 2016-09-15 | 2017-05-10 | 中铁第四勘察设计院集团有限公司 | Moderate -low speed magnetic levitation traffic engineering double -line excavation location pile foundation combined type support rail girder construction |
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