CN109440545A - The road structure and construction method of operation high-speed railway are worn under a kind of - Google Patents
The road structure and construction method of operation high-speed railway are worn under a kind of Download PDFInfo
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- CN109440545A CN109440545A CN201811458094.1A CN201811458094A CN109440545A CN 109440545 A CN109440545 A CN 109440545A CN 201811458094 A CN201811458094 A CN 201811458094A CN 109440545 A CN109440545 A CN 109440545A
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- 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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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Abstract
The present invention relates to railway bed technical field of structures, in particular to the road structure and construction method for wearing operation high-speed railway under one kind, the road structure includes the embankment formula U-lag being arranged between two neighboring operation high-speed railway bridge cushion cap, the two sides of the bottom of the U-lag are provided with the isolation curtain pile arranged along its length, multiple rows of drilled pile is provided between isolation curtain pile described in two sides, the bottom plate at the top and U-lag of the isolation curtain pile and drilled pile connects, and the bottom of the isolation curtain pile and drilled pile extends vertically downward to be goed deep into roadbed.The road structure of operation high-speed railway is worn under of the invention, it effectively eliminates the interference effect to existing railway and guarantees to run the safety of high-speed railway, the smooth implementation of road structure is worn under having ensured, Social benefit and economic benefit is obvious, while comparing under-traverse tunnel scheme and more saving expense and reduce difficulty of construction.
Description
Technical field
The present invention relates to the technical fields of railway bed structure, in particular to the roadbed knot for wearing operation high-speed railway under one kind
Structure and construction method.
Background technique
The high low embankment less than 1m is dug and shallow cutting form is logical currently, wearing operation high-speed railway under roadbed and generalling use to fill out
It crosses, but often there are some problems, because of waterlogging drainage requirement, roadbed raising tends not to be less than 1m, when high-grade roadbed passes through
It also needs to carry out consolidation process to roadbed, be limited by the lower space Chuan Chu, these aspects can generate interference shadow to operation high-speed railway
It rings.In addition, wearing operation high-speed railway bridge under high-grade roadbed, limited by bridge pier across arrangement and headroom, raising is more than the road 1m
Base slope, which is banketed, has that intrusion covers operation high-speed rail bridge cushion cap, while use CFG, rotary churning pile or rotary digging stake etc. add
Gu high-grade roadbed foundation construction there is a problem of headroom not enough and disturbance is excessive.
In the prior art, the Chinese invention patent of Publication No. CN107034744A discloses a kind of concurrent operation high-speed iron
Road separate type route road structure and its construction method, the road structure include equally distributed more along width of railway subgrade formation direction
Gang drill hole pouring pile, it further includes setting that cast-in-situ bored pile described in every row, which includes equally distributed multiple along railway bed length direction,
The reinforced concrete U-shaped slot being placed at the top of the cast-in-situ bored pile.In above-mentioned technical proposal, although can reduce increase and decrease route
Sedimentation, but drilled pile construction and reinforced concrete U-shaped slot banket and loads are waited to disturb the presence close to operation high-speed rail bridge basis
It is dynamic to influence, it not can solve the problem for wearing operation high-speed railway under limited space roadbed, not can guarantee the safety of operation high-speed railway
Property.
For this purpose, realizing that high-grade fill subgrade meets there is an urgent need to obtain a kind of new-type embankment structure and wearing operation under safety
The requirement of high-speed railway.
Summary of the invention
The purpose of the present invention is to solve the deficiency of the above background technology, provides the road that operation high-speed railway is worn under one kind
Based structures and construction method effectively solve the problems, such as to wear operation high-speed railway under limited space roadbed, and guarantee to run high-speed iron
The safety on road.
The technical solution of the present invention is as follows: wearing the road structure of operation high-speed railway under one kind, including it is arranged two neighboring
The embankment formula U-lag between high-speed railway bridge cushion cap is runed, the two sides of the bottom of the U-lag are provided with cloth along its length
The isolation curtain pile set is provided with multiple rows of drilled pile, the isolation curtain pile and drilled pile between isolation curtain pile described in two sides
Top and the bottom plate of U-lag connect, the bottom of the isolation curtain pile and drilled pile extends deep in roadbed vertically downward.
In above-mentioned technical proposal, the U-lag includes bottom plate and the side wall that floor length direction two sides are arranged in, the bottom
Plate is arranged in the roadbed of below ground, and the side wall includes inner sidewall and lateral wall, and the thickness of the lateral wall is greater than inside
The thickness of wall is provided with several drain holes for running through its interior and exterior on the lateral wall.
In above-mentioned technical proposal, the medial surface of the side wall is provided with loaded filter.
Packing layer under bedding, bottom layer of subgrade and bedding table are equipped in above-mentioned technical proposal, in the U-lag from the bottom to top
The top surface of layer, the bottom layer of subgrade and surface layer of subgrade bed is provided with by the flowing water slope of the outside water conservancy diversion in center.
In above-mentioned technical proposal, the isolation curtain pile is made of multiple rows of root pile, and multiple rows of root pile is in quincunx
Arrangement；Multiple rows of drilled pile is in rectangle or quincuncial arrangement.
In above-mentioned technical proposal, the bottom depth of the root pile is 2~4m bigger than the bottom depth of drilled pile.
The present invention also provides one kind wears the road structure of operation high-speed railway construction methods under above-mentioned, including walk as follows
It is rapid:
1) isolation curtain pile applies: applying brill micro-hole using hole construction method is jumped, micro-hole uses mud off, and merogenesis is hung
Reinforcing bar is put between two parties, carrying out spreading by staggeredly mode using overlap welding in micro-hole, slurry is finally perfused and forms isolation curtain pile；
2) drilled pile applies: applying brill stake holes using full-sleeve follow-up technique, hangs steel reinforcement cage in placed in the middle in stake holes, using taking
It connects the same section of weldering and carries out spreading by half principle, last concrete perfusion forms drilled pile；
3) U-lag applies: first excavating foundation soil to U-lag bottom surface, then is laid with screed-coat in U-lag bottom surface, binds bottom plate
Reinforcing bar, and anchor into drilled pile top rebars in U-lag bottom plate, casting concrete forms the bottom plate of U-lag, in the length of bottom plate
Direction two sides set up inner side template, bind U-lag side wall reinforcing bar, then set up U-lag outboard template, last casting concrete is formed
The side wall of U-lag；
4) roadbed filling: loaded filter is set in the inside sidewalls of U-lag, is laid with bedding from the bottom to top according still further to roadbed standard
Lower packing layer, bottom layer of subgrade and surface layer of subgrade bed.
In above-mentioned technical proposal, in the step 1), micro-hole is in quincuncial arrangement, and the aperture of micro-hole is 0.13~
0.3m, the spacing of two neighboring micro-hole are 0.3~0.5m, 2~4m that the depth of micro-hole is；In the step 2), stake holes
In rectangle or quincuncial arrangement, and the aperture of stake holes is 0.8~1.5m.
In above-mentioned technical proposal, in the step 3), screed-coat is metalling or cement sand bed, with a thickness of 0.05~
0.1m；The side wall of the U-lag is equipped with drain hole every 1~2m more than ground.
In above-mentioned technical proposal, in the step 4), the top surface of bottom layer of subgrade and surface layer of subgrade bed be provided with from center to
The flowing water slope of outer water conservancy diversion, the ratio of slope on the flowing water slope are 4~6%.
Compared with prior art, advantages of the present invention has:
First, wearing the road structure of operation high-speed railway under of the invention, sufficiently integration utilizes the embankment for having closing slope effect
The isolation curtain structure of formula anticollision U-lag combination low clearance full-sleeve follow-up drilled pile and quincunx root pile composition, successfully solves
The roadbed design and construction difficult problem of operation high-speed railway limited space are worn under having determined.
Second, wearing the road structure of operation high-speed railway under of the invention, the interference effect to existing railway is effectively eliminated
And guarantee to run the safety of high-speed railway, and the smooth implementation of road structure is worn under having ensured, Social benefit and economic benefit is obvious,
Under-traverse tunnel scheme is compared simultaneously more to save expense and reduce difficulty of construction.
Third, the road structure for wearing operation high-speed railway under of the invention makes full use of the closing slope of embankment formula anticollision U-lag
With anticollision effect and low clearance full-sleeve follow-up drilled pile can the construction of small space and perturbation dynamic characteristic, meet the high-grade road Xia Chuan
The Deformation control of base and avoid intrusion operation high-speed rail bridge cushion cap requirement, be effectively reduced to close to operation high-speed rail bridge cushion cap and
The influence on basis.
Fourth, setting two is micro- to multiple rows of quincunx root pile composition isolation curtain structure isolation on the outside of U-lag of the invention
Disturbing influence is further eliminated to banket in drilled pile construction and U-lag and waits loads to the disturbance close to operation high-speed rail bridge basis
It influences, effectively solves the problems, such as to wear operation high-speed railway under limited space roadbed, and guarantee to run the safety of high-speed railway.
Detailed description of the invention
Fig. 1 be it is of the invention under wear operation high-speed railway road structure front sectional view；
Fig. 2 is the overlooking structure diagram of Fig. 1；
Wherein: 1- run high-speed railway bridge cushion cap, 2-U shape slot, 2.1- bottom plate, 2.2- side wall, 2.21- inner sidewall,
Packing layer, 9- under 2.22- lateral wall, 3- isolation curtain pile, 4- drilled pile, 5- roadbed, 6- drain hole, 7- loaded filter, 8- bedding
Bottom layer of subgrade, 10- surface layer of subgrade bed, 11- flowing water slope, 12- root pile, 13- screed-coat.
Specific embodiment
The following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
The road structure of operation high-speed railway is worn under one kind as depicted in figs. 1 and 2, including is arranged in two neighboring operation
Embankment formula U-lag 2 between high-speed railway bridge cushion cap 1, the U-shaped profile shape of the U-lag 2.The bottom of the U-lag 2
Portion two sides are provided with the isolation curtain pile 3 arranged along its length, are provided with multiple rows of brill between isolation curtain pile 3 described in two sides
Hole stake 4, drilled pile 4 is using low clearance full-sleeve follow-up drilling pilework.Top and the U of the isolation curtain pile 3 and drilled pile 4
The bottom plate of shape slot 2 connects, and the bottom of the isolation curtain pile 3 and drilled pile 4 extends vertically downward to be goed deep into roadbed 5.
In above-mentioned technical proposal, the U-lag 2 includes bottom plate 2.1 and the side wall that 2.1 length direction two sides of bottom plate are arranged in
2.2, the bottom plate 2.1 is arranged in the roadbed 5 of below ground, and the side wall 2.2 includes inner sidewall 2.21 and lateral wall 2.22,
The thickness of the lateral wall 2.22 is greater than the thickness of inner sidewall 2.21, several are provided on the lateral wall 2.22 in it
The drain hole 6 of outside.The medial surface of the side wall 2.2 is provided with loaded filter 7.It is equipped with bedding from the bottom to top in the U-lag 2
The top surface of lower packing layer 8, bottom layer of subgrade 9 and surface layer of subgrade bed 10, the bottom layer of subgrade 9 and surface layer of subgrade bed 10 be provided with from center to
The flowing water slope 11 of outer water conservancy diversion.The isolation curtain pile 3 is made of multiple rows of root pile 12, and multiple rows of root pile 12 is in quincunx cloth
It sets；Multiple rows of drilled pile 4 is in rectangle or quincuncial arrangement.The bottom depth of the root pile 12 is deeper than the bottom of drilled pile 4
Spend big 2~4m.
The present invention proposes that embankment formula anticollision U-lag and low clearance full-sleeve follow-up drilling pilework, U-lag play closing slope and keep away
The effect of intrusion operation high-speed railway bridge cushion cap is opened, and the U-lag side wall upper part (being higher than 1~2m of road bed) plays isolation
And the effect for hitting adjacent operation high-speed rail bridge pier on roadbed after running train derailing is prevented, under embankment formula anticollision U-lag side wall
Portion is to undertake that soil lateral pressure load is larger, top is that undertake the lateral train impact force load that derails slightly smaller, therefore side wall upper part institute
It needs thickness to be less than lower part, is step-like variable thickness side wall, low clearance drilled pile (height is generally less than 6m) is realized under high-speed rail bridge
The foundation stabilization of limited space roadbed, U-lag bottom plate and drilled pile composite structure carry jointly meet it is high-grade under wear roadbed
Deformation control requirement, drilled pile are effectively reduced with full-sleeve follow-up technique to the shadow close to operation high-speed rail bridge cushion cap and basis
It rings, reach micro-disturbance effect；Combine on the outside of the U-lag simultaneously be arranged multiple rows of quincunx root pile (root pile deep compared with drilled pile 2~
4m) composition isolation curtain structure further eliminates the equal loads that banket in drilled pile construction and U-lag to close to operation high-speed rail bridge
The disturbing influence on basis.In addition, make full use of embankment formula anticollision U-lag closing slope and anticollision effect and low clearance full-sleeve follow-up
Drilled pile can the construction of small space and perturbation dynamic characteristic, while quincunx root pile curtain structure isolation micro-disturbance be set influence,
It effectively solves the problems, such as to wear operation high-speed railway under limited space roadbed, and guarantees to run the safety of high-speed railway.
The present invention also provides one kind wears the road structure of operation high-speed railway construction methods under above-mentioned, including walk as follows
It is rapid:
1) isolation curtain pile applies: geological drilling rig, which is applied, bores quincunx micro-hole, is constructed using hole is jumped, and aperture 0.13~
0.3m, spacing are generally 0.3~0.5m, and root pile 2~4m deep compared with drilled pile is effectively isolated curtain structure to be formed, drilling machine pore-forming
Using mud off, main reinforcement by no less than 3 a branch of elongated settings, outside welding spacer bar so as to centering, merogenesis behind clear bottom
Reinforcing bar is hung in placed in the middle in hole, spreading, timely grout injection, cement mortar, microlith are carried out by staggeredly mode using overlap welding
Concrete or other grouting material piles.
2) drilled pile applies: applying brill stake holes, 0.8~1.5m of aperture, rectangle or quincunx cloth using low clearance circulation drilling machine
It sets, stake is long and stake spacing is calculated according to subgrade deformation and requirement for bearing capacity and determined, drilling machine pore-forming is bored with full-sleeve follow-up technique
Into the interference of, it is ensured that Kong Zhouwu collapse hole, assembling reinforcement, merogenesis hangs steel reinforcement cage in placed in the middle in hole behind clear bottom, same using overlap welding
Section carries out spreading, timely concrete perfusion pile, strength grade of concrete C30 or more by half principle.
3) U-lag applies: excavating foundation soil to embankment formula U-lag bottom surface, a road width 0.15m, depth 0.15m soil are respectively dug in two sides
Ditch excludes casual water, and it may be either equal in width form that space layout requirement is worn under embankment formula U-lag sight path, can also be as required
It is set as the different Trapezoidal form of transverse width.The groove bottom of smooth embankment formula U-lag, bottom are laid with 0.05~0.1m thickness
Rubble or cement mortar screeding layer bind baseplate reinforcing bar and drilled pile top and reinforcing bar are made to anchor into U-lag bottom plate, pour U-lag
Underplate concrete, erect the step-like Varying-thickness inner side template of U-lag, binding U-lag side wall reinforcing bar, erect U-lag outboard template,
Every 1~2m installation pvc pipe drain hole, (wherein side wall should be equipped with pvc pipe to U-lag side wall at surface layer of subgrade bed bottom surface more than ground
Drain hole is to drain rainwater), cast in situs U-lag side wall concrete, the foundation pit backbreak after U-lag demoulding is using the low mark such as C15
Number concrete backfill.
4) roadbed filling: loaded filter is arranged in U-lag side wall, fills filler according to the following standard of subgrade bed and uses minicomputer
Tool layered rolling is closely knit, and packing layer end face center fills filler simultaneously according to roadbed bottom standard to the flowing water slope of peripheral hardware 4% under bed
With small machine layered rolling is closely knit, bottom layer of subgrade end face center is to the flowing water slope of peripheral hardware 4%, filled according to roadbed surface layer standard
Graded broken stone or filler and, road bed shape closely knit with small machine layered rolling are arranged according to railroad track pattern.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent defines.
Claims (10)
1. wearing the road structure of operation high-speed railway under one kind, it is characterised in that: including being arranged in two neighboring operation high-speed iron
The two sides of the bottom of embankment formula U-lag (2) between road bridge bearing platform (1), the U-lag (2) are provided with cloth along its length
The isolation curtain pile (3) set is provided with multiple rows of drilled pile (4) between isolation curtain pile (3) described in two sides, the isolation curtain pile
(3) it is connect with the top of drilled pile (4) with the bottom plate of U-lag (2), the bottom of isolation curtain pile (3) and drilled pile (4) is hung down
It directly extends downwardly deeply interior to roadbed (5).
2. wearing the road structure of operation high-speed railway under according to claim 1, it is characterised in that: U-lag (2) packet
Bottom plate (2.1) and setting are included in the side wall (2.2) of bottom plate (2.1) length direction two sides, the bottom plate (2.1) setting ground with
Under roadbed (5) in, the side wall (2.2) includes inner sidewall (2.21) and lateral wall (2.22), the lateral wall (2.22)
Thickness is greater than the thickness of inner sidewall (2.21), several drain holes for running through its interior and exterior are provided on the lateral wall (2.22)
(6)。
3. wearing the road structure of operation high-speed railway under according to claim 2, it is characterised in that: the side wall (2.2)
Medial surface be provided with loaded filter (7).
4. wearing the road structure of operation high-speed railway under according to claim 1 or 2 or 3, it is characterised in that: the U-shaped
It is equipped with packing layer under bedding (8), bottom layer of subgrade (9) and surface layer of subgrade bed (10), the bottom layer of subgrade from the bottom to top in slot (2)
(9) and the top surface of surface layer of subgrade bed (10) is provided with the flowing water slope (11) by the outside water conservancy diversion in center.
5. wearing the road structure of operation high-speed railway under according to claim 1 or 2 or 3, it is characterised in that: the isolation
Curtain pile (3) is made of multiple rows of root pile (12), and multiple rows of root pile (12) is in quincuncial arrangement；Multiple rows of drilled pile
It (4) is in rectangle or quincuncial arrangement.
6. wearing the road structure of operation high-speed railway under according to claim 5, it is characterised in that: the root pile (12)
Bottom depth it is 2~4m bigger than the bottom depth of drilled pile (4).
7. wearing the construction method of the road structure of operation high-speed railway under a kind of any one of claim 1~6 is described, feature exists
In including the following steps:
1) isolation curtain pile applies: applying brill micro-hole using hole construction method is jumped, micro-hole uses mud off, and merogenesis hangs steel
Muscle is finally perfused slurry and forms isolation curtain pile (3) between two parties, carrying out spreading by staggeredly mode using overlap welding in micro-hole；
2) drilled pile applies: applying brill stake holes using full-sleeve follow-up technique, hangs steel reinforcement cage in placed in the middle in stake holes, using overlap welding
Same section carries out spreading by half principle, and last concrete perfusion forms drilled pile (4)；
3) U-lag applies: first excavating foundation soil to U-lag bottom surface, then is laid with screed-coat (13) in U-lag bottom surface, binds bottom plate
Reinforcing bar, and anchor into drilled pile top rebars in U-lag bottom plate, casting concrete forms the bottom plate (2.1) of U-lag, in bottom plate
(2.1) length direction two sides set up inner side template, bind U-lag side wall reinforcing bar, then set up U-lag outboard template, finally pour
Build the side wall (2.2) that concrete forms U-lag；
4) roadbed filling: loaded filter (7) are set on the inside of the side wall (2.2) of U-lag (2), from the bottom to top according still further to roadbed standard
It is laid with packing layer (8), bottom layer of subgrade (9) and surface layer of subgrade bed (10) under bedding.
8. wearing the construction method of the road structure of operation high-speed railway under according to claim 7, it is characterised in that: described
In step 1), micro-hole is in quincuncial arrangement, and the aperture of micro-hole is 0.13~0.3m, and the spacing of two neighboring micro-hole is
0.3~0.5m, 2~4m that the depth of micro-hole is；In the step 2), stake holes is in rectangle or quincuncial arrangement, and stake holes
Aperture is 0.8~1.5m.
9. wearing the construction method of the road structure of operation high-speed railway under according to claim 7, it is characterised in that: described
In step 3), screed-coat (13) is metalling or cement sand bed, with a thickness of 0.05~0.1m；The side wall of the U-lag
(2.2) drain hole (6) are installed every 1~2m more than ground.
10. wearing the construction method of the road structure of operation high-speed railway under as claimed in claim 7 according to step, feature exists
In: in the step 4), it is provided in the top surface of bottom layer of subgrade (9) and surface layer of subgrade bed (10) by the flowing water slope of the outside water conservancy diversion in center
(11), the ratio of slope of the flowing water slope (11) is 4~6%.
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| CN110055896A (en) * | 2019-04-22 | 2019-07-26 | 同济大学 | A kind of just beam discharging method when boring across underneath high-speed railway road-bridge transition section |
| CN110107303A (en) * | 2019-04-19 | 2019-08-09 | 同济大学 | The deformation control method of shallow earthing shield boring across underneath high-speed railway |
| CN111041995A (en) * | 2019-12-30 | 2020-04-21 | 中铁六局集团天津铁路建设有限公司 | Construction method for U-shaped frame structure to penetrate high-speed rail bridge obliquely downwards |
| CN111926866A (en) * | 2020-08-20 | 2020-11-13 | 同济大学 | Obstacle encountering implementation method for reinforcing isolation pile in shield construction near high-speed railway |
| CN112267458A (en) * | 2020-10-14 | 2021-01-26 | 中国建筑第八工程局有限公司 | Micro-disturbance construction method for full-casing cast-in-situ bored pile adjacent to subway |
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| CN110107303A (en) * | 2019-04-19 | 2019-08-09 | 同济大学 | The deformation control method of shallow earthing shield boring across underneath high-speed railway |
| CN110055896A (en) * | 2019-04-22 | 2019-07-26 | 同济大学 | A kind of just beam discharging method when boring across underneath high-speed railway road-bridge transition section |
| CN110055896B (en) * | 2019-04-22 | 2021-02-26 | 同济大学 | Temporary beam unloading method during underpass of high-speed railway road and bridge transition section |
| CN111041995A (en) * | 2019-12-30 | 2020-04-21 | 中铁六局集团天津铁路建设有限公司 | Construction method for U-shaped frame structure to penetrate high-speed rail bridge obliquely downwards |
| CN111926866A (en) * | 2020-08-20 | 2020-11-13 | 同济大学 | Obstacle encountering implementation method for reinforcing isolation pile in shield construction near high-speed railway |
| CN112267458A (en) * | 2020-10-14 | 2021-01-26 | 中国建筑第八工程局有限公司 | Micro-disturbance construction method for full-casing cast-in-situ bored pile adjacent to subway |
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