CN206157480U - Moderate -low speed magnetic levitation traffic engineering double -line excavation location pile foundation combined type support rail girder construction - Google Patents

Abstract

The utility model belongs to the technical field of the low circuit of putting of well low -speed maglev traffic engineering to moderate -low speed magnetic levitation traffic engineering double -line excavation location pile foundation combined type support rail girder construction is disclosed, backfill including the compound load bearing structure of first pile foundation load bearing structure, supporting beam of pile foundation, the two rows of reinforced concrete support rail breast boards, the two rows of reinforced concrete beam structure and support rail roof beam both sides and pack, first pile foundation load bearing structure is provided with many, every accept on first pile foundation load bearing structure's top reinforced concrete support rail breast board, accept on the top of reinforced concrete support rail breast board reinforced concrete beam structure, the other escape canal that is provided with of packing is backfilled to support rail roof beam both sides, set up draining slope on the escape canal. The utility model discloses low -speed maglev traffic engineering track structure can satisfy the requirement of foundation bed long term stability, durability and construction quality controllability again to support rail roof beam structural distortion and the high requirement of post -construction settlement in can satisfying, and economic nature is better.

Description

Medium-and low-speed maglev traffic engineering two-wire excavation location pile foundation combined type support rail girder construction

Technical field

The utility model belongs to that middle low speed magnetic suspension traffic engineering is low to put Line technology field, low more particularly, in Fast 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 at present is opened is transported The middle low speed magnetic suspension railway business operating line that line-the East Hillside Line and in June, 2014 Korea open.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 based on elevated structure, the rarely seen relevant low research put in terms of circuit support rail girder construction and applies.

The outstanding traffic civil engineering part of middle low speed magnetic suspension 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 affect comfortableness even prestige by bus Side of body traffic safety, so the design of support rail beam is particularly significant.

Existing support rail girder construction is applied and exist on circuit problems with middle low speed magnetic suspension traffic low putting：

(1) existing low circuit support rail girder construction of putting is arranged on roadbed earth structure, roadbed earth structure by Filler fills compacting and forms, and compaction quality is wayward, and the later stage is susceptible to deformation, affects the integral rigidity of structure, and after work Sedimentation is difficult to control to.

(2) low circuit support rail girder construction of putting has high demands to the settlement after construction of roadbed and ground, and is routed through the ground in region Matter condition is typically all complicated and changeable, is controlled using conventional support rail beam structure construction difficult quality.

(3) because the low circuit earth structure of putting that filler fills compacting has vulnerability, and construction quality is difficult 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, the construction period is long to take traditional support rail girder construction pattern to exist, and construction quality is not easily-controllable System, the defect such as whole structural stability is poor and less economical.

Utility model content

For the disadvantages described above or Improvement requirement of prior art, it is double that the utility model provides medium-and low-speed maglev traffic engineering Line excavation location pile foundation combined type support rail girder construction, can avoid the low defect for putting circuit support rail girder construction of tradition, and construction quality is more Be easily controlled, long-time stability more preferably, and during it both meets low speed magnetic suspension traffic engineering track structure to support rail girder construction Deformation and the high requirement of settlement after construction, meet the requirement of bedding long-time stability, durability and construction quality controllability again.

For achieving the above object, according to the utility model, there is provided medium-and low-speed maglev traffic engineering two-wire excavation location stake Base combined type support rail girder construction, it is characterised in that including the first pile foundation bearing structure, pile foundation joist composite bearing structure, two rows Armored concrete support rail beam base 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 base plate；

The first pile foundation bearing structure is provided with many, is vertically arranged per the first pile foundation bearing structure described in root, and And the armored concrete support rail beam base plate is accepted on the top per the first pile foundation bearing structure described in root, first pile foundation is held The top of load structure is embedded in the armored concrete support rail beam base plate and just connects with it；

Accept the reinforced concrete beam type structure, and the reinforcing bar in the top of the armored concrete support rail beam base plate Concrete support rail beam base plate pours shaping with the reinforced concrete beam type structural integrity, holds so as to collectively form armored concrete Beam-and-rail；

In per placing of reinforcement concrete support rail beam base plate, reserve between armored concrete support rail beam base plate described in two adjacent sections and stretch Contracting seam；

The pile foundation joist composite bearing structure setting has multiple, and the adjacent two sections armored concrete support rail beam The pile foundation joist composite bearing structure is respectively provided with the expansion joint of base plate, the two sections reinforcing bar for supporting this adjacent is mixed Solidifying soil support rail beam base plate, each described pile foundation joist composite bearing structure includes that reinforced concrete supporting beam and the second pile foundation are carried Structure, and the reinforced concrete supporting beam, the reinforced concrete are accepted in the top per the second pile foundation bearing structure described in root Native joist accepts the armored concrete support rail beam base plate；

The top of the second pile foundation bearing structure is embedded in the reinforced concrete supporting beam and just connects with it, the reinforced concrete Native joist has just connect or has overlapped with the armored concrete support rail beam base plate；

The reinforced concrete supporting beam both sides are provided with for limiting the armored concrete support rail beam base plate lateral displacement Convex gear platform；

Wired weathering section is set described in two rows between reinforced concrete beam type structure, and weathering section has between the line Cross fall and head fall, for current are introduced into two adjacent sections armored concrete support rail beam base plate internode expansion joint further 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, the gutter is provided with weathering away from the side that the support rail beam both sides backfill filler；

The armored concrete support rail beam base plate is located in support rail beam both sides backfill filler；

Lower end per the first pile foundation bearing structure described in root is stretched in supporting course through after 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, in case the sedimentation of support rail beam both sides backfill filler reduces vertical, the longitudinal direction of armored concrete support rail beam And lateral stiffness.

Preferably, the first pile foundation bearing structure is cast-in-situ bored pile, and joist has just connect or overlapped with support rail beam base plate, with Pile foundation bearing structure just connects.

Preferably, the position joist in support rail beam internode seam is overlapped with support rail beam base plate using pin, and remaining position adopts Just connect or overlap.

Preferably, the first pile foundation bearing structure described in all these is arranged in ranks.

Preferably, roadbed filling under the support rail beam, shallow is sequentially passed through per the lower end of the second pile foundation bearing structure described in root Stretch in supporting course after layer stabilization zone and the soft stratum.

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 utility model compared with prior art, can obtain down Row beneficial effect：

(1) armored concrete support rail beam base plate of the present utility model, reinforced concrete beam type structure adopt reinforced concrete Soil scene one-piece casting, the two composition integral reinforced concrete structure is floated to the magnetic for directly taking on track load and track transmission Train load, then deadweight and upper load are passed to and its rigidly connected first pile foundation bearing structure, structural reliability is high.

(2) the first pile foundation bearing structure of the present utility model is goed deep in supporting course, when roadbed produces certain sedimentation, first Base bearing structure can still bear negative friction and provide stronger bearing capacity, it is to avoid make because foundation stabilization quality is wayward Into sedimentation is vertical to support rail beam, vertical and horizontal rigidity impact, structure vertical cross stiffness is more excellent.

(3) the first pile foundation bearing structure control settlement effect of the present utility model preferably, therefore can reduce cutting bedding and change Fill out thickness, need to only meet the requirement of basic replacement thickness, can investment reduction, it is the reduction of erection time, excellent with obvious technology and economy Gesture.

(4) while two placing of reinforcement concrete beam-type structures of two-wire are combined by reinforced concrete floor, can To be effectively increased the lateral stiffness of reinforced concrete beam type structure, make left and right two save reinforced concrete beam type structure and be placed in rigidity phase On same reinforced concrete floor, the lateral stability of reinforced concrete beam type structure can be effectively increased, control reinforced concrete Relative settlement between native girder structure, also beneficial to operation during maintenance with safeguard, measure is simple, easily construction, cost save, effect It is really good.

(5) reinforced concrete supporting beam that pile foundation bearing structure and reinforced concrete floor are arranged, can greatly reduce pile foundation The stress concentration phenomenon of armored concrete support rail beam base plate at bearing structure；Further, since the lateral connection effect of joist, also increases Add the lateral stiffness of structure and the ability of opposing differential settlement deformation, the quantity of transverse pile foundation can have been reduced, reduce investment.

(6) adjacent armored concrete support rail beam base plate shares pile foundation joist composite bearing structure, and in adjacent steel Expansion joint is reserved between reinforced concrete support rail beam base plate, impact failure of the section by train load of encorbelmenting can be avoided, and reduce temperature The impact of stress and shrinkage and creep.

Description of the drawings

Fig. 1 is schematic longitudinal section of the present utility model；

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 that the plane distribution of the first pile foundation bearing structure and pile foundation joist composite bearing structure in the utility model is illustrated Figure；

Fig. 5 is the connection signal of armored concrete support rail beam base plate and the first pile foundation bearing structure in the utility model.

Fig. 6 is that the utility model pile foundation joist has just connect connection diagram with armored concrete support rail beam base plate.

Fig. 7 is that the utility model pile foundation joist overlaps connection diagram with armored concrete support rail beam base plate.

Fig. 8 is the cross-sectional view of pin in the utility model.

Specific embodiment

In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement Example, is further elaborated to the utility model.It should be appreciated that specific embodiment described herein is only to explain The utility model, is not used to limit the utility model.Additionally, institute in the utility model disclosed below each embodiment As long as the technical characteristic being related to does not constitute each other conflict and just can be mutually combined.

Reference Fig. 1～Fig. 8, 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 base 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 base plate 2；

The first pile foundation bearing structure 3 is provided with many, is vertically arranged per the first pile foundation bearing structure 3 described in root, And accept the armored concrete support rail beam base plate 2 per the top of the first pile foundation bearing structure 3 described in root, described first The top of base bearing structure 3 is embedded in the armored concrete support rail beam base plate 2 and just connects with it；

Accept the reinforced concrete beam type structure 1, and the steel in the top of the armored concrete support rail beam base plate 2 Reinforced concrete support rail beam base 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；

In per placing of reinforcement concrete support rail beam base plate 2, arrange between armored concrete support rail beam base plate 2 described in two adjacent sections Expansion joint；

The pile foundation joist composite bearing structure 90 is provided with multiple and adjacent two sections armored concrete support rails The pile foundation joist composite bearing structure 90 is respectively provided with the expansion joint of beam base plate 2, two sections for supporting this adjacent are described Armored concrete support rail beam base plate 2, each described pile foundation joist composite bearing structure 90 includes the He of reinforced concrete supporting beam 901 Second pile foundation bearing structure 902, and the armored concrete is accepted on the top per the second pile foundation bearing structure 902 described in root Joist 901, the reinforced concrete supporting beam 901 accepts the armored concrete support rail beam base plate 2；

The top of the second pile foundation bearing structure 3 is embedded in the reinforced concrete supporting beam 901 and just connects with it, the reinforcing bar Concrete joist 901 has just connect or has overlapped with the armored concrete support rail beam base plate 2；

The both sides of the reinforced concrete supporting beam 901 are provided with horizontal for limiting the armored concrete support rail beam base plate 2 The convex gear platform 91 of displacement；

Wired weathering section is set described in two rows between reinforced concrete beam type structure 1, weathering section tool 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 base plate 2 And then discharge in current；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, the gutter 7 is provided with weathering 8 away from the side that the support rail beam both sides backfill filler 4；

The armored concrete support rail beam base plate 2 is located in support rail beam both sides backfill filler 4；

Lower end per the first pile foundation bearing structure 3 described in root through stretching in supporting course 6 after the soft stratum 5, 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, in case the differential settlement of 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, and joist has just connect or overlapped with support rail beam base plate, Just connect with pile foundation bearing structure.Overlapped using pin with support rail beam base plate in the position joist of support rail beam internode seam, remaining position Using just connecing or overlap.

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 arranges between the two the pitch hemp cut 10.2.

First pile foundation bearing structure 3 described in all these is arranged in ranks.

The structural shape can in effectively solving the low circuit of putting of low speed magnetic suspension traffic engineering it is tight to post-construction settlement of subgrade requirement Lattice, take traditional cutting excavate replacement thickness it is big caused by engineering is huge, invest big, long in time limit, and backfill filler construction Quality is wayward, the problem of bedding long-time stability and poor durability, so as to improve the low reliability for putting circuit support rail girder construction Degree, reduces engineering risk.

Armored concrete support rail beam 9 of the present utility model adopts reinforced concrete soil scene one-piece casting, to directly take on rail Road load and the magnetic-levitation train load of track transmission, then deadweight and upper load are passed to and its rigidly connected first pile foundation Bearing structure 3, structural reliability is high, can save the foundation stabilization of cutting bedding and reduce cutting bedding replacement thickness, only needs to meet The requirement of basic replacement thickness, can investment reduction, the reduction of erection time, with obvious technology and economic advantages.

First pile foundation bearing structure 3 adopts cast-in-situ bored pile, and transverse direction and longitudinal direction has and is arranged with many reinforced concrete drills Hole pouring pile, vertical and horizontal rigidity is big；And first pile foundation bearing structure 3 go deep into supporting course 6, when soft stratum 5 produces sedimentation, Pile foundation carries knot and can still bear negative friction and provide stronger bearing capacity to armored concrete support rail beam base plate 2.

The reinforced concrete supporting beam 90 that pile foundation bearing structure 3 and reinforced concrete floor 2 are arranged, can greatly reduce pile foundation The stress concentration phenomenon of armored concrete support rail beam base plate 2 at bearing structure 3；Further, since the horizontal stroke of reinforced concrete supporting beam 90 To connection function, the lateral stiffness of structure and the ability of opposing differential settlement deformation are also increased, transverse pile foundation can be reduced Quantity, reduces investment.

The internode of adjacent segments armored concrete support rail beam base plate 2 shares pile foundation joist composite bearing structure, and adjacent Expansion joint is reserved between armored concrete support rail beam base plate, impact failure of the section by train load of encorbelmenting can be avoided, and reduce temperature The impact of degree stress and shrinkage and creep.

Two placing of reinforcement concrete beam-type structures of two-wire are combined by reinforced concrete floor simultaneously, Ke Yiyou Effect increases the lateral stiffness of reinforced concrete beam type structure, makes left and right two save reinforced concrete beam type structure and is placed in rigidity identical On reinforced concrete floor, the lateral stability of reinforced concrete beam type structure can be effectively increased, control reinforced beam Relative settlement between formula structure, also beneficial to operation during maintenance with safeguard, measure is simple, easily construction, cost save, effect It is good.

The specific making step of the utility model is as follows：

(1) excavating cut slope side slope carries out necessary bedding and changes to fill out to designing at road bed absolute altitude according to design requirement；

(2) subgrade cross section, vertical section direction construction drill bored concrete pile are in reinforced concrete floor bottom surface absolute altitude, i.e., First pile foundation bearing structure 3, drilled pile construction should adopt the construction technology little to filling roadbed disturbance；Reach in cast-in-situ bored pile To after desired strength, by code requirement pile crown, colligation concrete floor and the connection reinforcing bar with stake are amputated；

(3) formwork erection of platform 91, one-time-concreting shaping, before pouring are kept off to reinforced concrete supporting beam 90, convex according to design attitude Carry out all kinds of built-in fittings such as pin 10 and the positioning with the connection reinforcing bar of pile foundation and install, concrete reaches and removed after design strength Template；

It is (4) long to armored concrete support rail beam base plate 2 and the merogenesis formwork erection of reinforced concrete beam type structure 1 according to design section, 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 reaches and distinguish after design strength form removal, then by armored concrete support rail beam base plate 2 Bedding filler backfill in thickness range, backfill face is made outward-dipping weathering 8, by design requirement top layer waterproof is carried out, and Weathering 8 on gutter 7 and gutter 7 is carried out, that is, is formed one kind for middle low speed magnetic suspension traffic engineering to be low and is put circuit pair Line excavation location pile foundation combined type support rail girder construction.

As it will be easily appreciated by one skilled in the art that preferred embodiment of the present utility model is the foregoing is only, not To limit the utility model, all any modifications made within spirit of the present utility model and principle, equivalent and change Enter, should be included within protection domain of the present utility model.

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 base 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 base plate；

The first pile foundation bearing structure is provided with many, is vertically arranged per the first pile foundation bearing structure described in root, and often The armored concrete support rail beam base plate is accepted on the top of the first pile foundation bearing structure described in root, and first pile foundation carries knot The top of structure is embedded in the armored concrete support rail beam base plate and just connects with it；

Accept the reinforced concrete beam type structure, and the reinforced concrete in the top of the armored concrete support rail beam base plate Native support rail beam base plate pours shaping with the reinforced concrete beam type structural integrity, so as to collectively form armored concrete support rail Beam；

In per placing of reinforcement concrete support rail beam base plate, arrange between adjacent two pieces of armored concrete support rail beam base plates flexible Seam；

The pile foundation joist composite bearing structure setting has multiple, and the adjacent two sections armored concrete support rail beam base plate Expansion joint at be respectively provided with the pile foundation joist composite bearing structure, for the two section armored concrete for supporting this adjacent Support rail beam base plate, each described pile foundation joist composite bearing structure includes that reinforced concrete supporting beam and the second pile foundation carry knot Structure, and the reinforced concrete supporting beam, the armored concrete are accepted in the top per the second pile foundation bearing structure described in root Joist accepts the armored concrete support rail beam base plate；

The top of the second pile foundation bearing structure is embedded in the reinforced concrete supporting beam and just connects with it, the armored concrete support Beam has just connect or has overlapped with the armored concrete support rail beam base plate；

The reinforced concrete supporting beam both sides are provided with for limiting the convex of the armored concrete support rail beam base plate lateral displacement Type keeps off platform；

Wired weathering section is set described in two rows between reinforced concrete beam type structure, and weathering section has horizontal between the line The gradient and head fall, for current are introduced into two adjacent sections armored concrete support rail beam base plate internode expansion joint further by water Stream is discharged；

The support rail beam both sides backfill filler is arranged on soft stratum, and is arranged by support rail beam both sides backfill filler There is gutter, the gutter is provided with weathering away from the side that the support rail beam both sides backfill filler；

The armored concrete support rail beam base plate is located in support rail beam both sides backfill filler；

Lower end per the first pile foundation bearing structure described in root is stretched in supporting course through after the soft stratum, with soft stratum When producing sedimentation, the first pile foundation bearing structure can bear negative friction, so as to provide to reinforcing bar armored concrete support rail beam Stable bearing capacity, in case the differential settlement of support rail beam both sides backfill filler reduces 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, joist has just connect or has overlapped with support rail beam base plate, with pile foundation Bearing structure just connects.

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, the position joist in support rail beam internode seam is overlapped with support rail beam base plate using pin, remaining position adopts and just connects 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, the first pile foundation bearing structure described in all these is 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, Characterized in that, roadbed filling, shallow-layer under the support rail beam are sequentially passed through per the lower end of the second pile foundation bearing structure described in root adding Stretch in supporting course after Gu Qu and the soft stratum.

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.