CN108642975A - A method of for being lifted Settlement diseases railway bed - Google Patents
A method of for being lifted Settlement diseases railway bed Download PDFInfo
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- CN108642975A CN108642975A CN201810191878.6A CN201810191878A CN108642975A CN 108642975 A CN108642975 A CN 108642975A CN 201810191878 A CN201810191878 A CN 201810191878A CN 108642975 A CN108642975 A CN 108642975A
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- churning
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- bed
- drill bit
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Classifications
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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
- E01B2/006—Deep foundation of tracks
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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
- E01B2204/00—Characteristics of the track and its foundations
- E01B2204/08—Deep or vertical foundation
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Railway Tracks (AREA)
- Machines For Laying And Maintaining Railways (AREA)
Abstract
The invention discloses a kind of methods for being lifted Settlement diseases railway bed, including：S1. boring positioning；S2. fastener unlocks；S3. rotary-spraying construction：Start horizontal jet grouting equipment, along bore position forward direction horizontal drilling, distance of the churning to drill bit away from opposite side slope surface stops when being 1~2m；Later, drill bit is reversely gradually backed out, while churning quick-set；Drill bit is retreated at away from the side slope surface positions 1.5m, is stopped whitewashing, is continued to invert, until drill bit exits roadbed ontology completely, completes the making of a horizontal jet grouting stake；S4. rotary churning pile equipment is moved into next position, repeated the above process, until completing whole lifting work of exceeded section of this railroad bed settlement.This method realizes the whole lifting of the above foundation bed structure of rotary churning pile and track structure under conditions of not influencing railway normal operation, improve working space utilization ratio, reduce workload of reaching the standard grade, settle exceeded roadbed lifting effect it is controllable, efficiently, energy-saving and environmental protection, it is cost-effective.
Description
Technical field
The invention belongs to railway bed maintenance and repair technology fields, and in particular to one kind is for being lifted Settlement diseases railway road
The method of base.
Background technology
Cut-off to the end of the year 2016, china railway operation total kilometrage reaches 120,000 kilometers, and wherein high-speed railway operating mileage reaches
To 1.9 ten thousand kilometers, this also indicates that RAILWAY ENGINEERING CONSTRUCTION IN CHINA and operation have reached a completely new stage.With China railways
Large scale construction and operation, all kinds of railway diseases and maintenance problem be puzzlement railway construction in China always and develop
It is crucial, wherein the Settlement diseases during railway operation are particularly problematic.To ensure China railways operation safety, circuit
The smooth degree of track requires relatively high, and railway in operation is also very stringent to roadbed settlement Control, such as China speed per hour 300km/h and
The above high ferro requires to open in principle the accumulative settling amount of the roadbed after runing no more than 15mm.In Practical Project, China railways are big
Amount passes through the junior geologic zones such as weak soil, loess, karst, and subgrade deformation problem largely exists, and especially develops region in weak soil
All kinds of railways built, since weak soil body has water content is big, compressibility is high, intensity is low, infiltration coefficient is small, consolidation cycle is grown etc.
The problems such as physics classroom teaching, regional settlement after construction are exceeded is still very prominent, and the sedimentation of railway bed is exceeded seriously
Influence the high-speed secure operation of China railways.
Currently, for rail track irregularity problem caused by settlement after construction, do not interrupt be open to traffic in the case of, mainly have
Following method for maintaining：First, the mode for taking adjustment fastener or increasing the adjustable amount of fastener is handled, the method is to a certain degree
On can restore the ride comfort of track structure, but its overall adjustment amount is relatively limited, and fastener adjusts amplitude, and there are limit values；Second is that right
In Ballast track, using newly-increased railway roadbed railway ballast method, the method is efficient for Ballast track relatively economical, but for bedding filler
Relatively poor situation, large-scale railway ballast, which changes to fill out, is still not enough to control subgrade settlement, causes railway ballast filling is excessive to form railway ballast
Capsule；Third, for non-fragment orbit, using track plates high polymer grouting mode, track plates are lifted by tooling device, in track
Fast gravity die high polymer is filled between plate and concrete bedding, restores the ride comfort of non-fragment orbit, and the method applies high polymer grouting
Work level requirement is higher, and final Uplifting amount is usually no more than 100~200mm, severely exceeds area for settling amount, makees
With can not also embody.
Invention content
The actuality needs that the purpose of the present invention is quickly renovate and repair for China railways engineering Settlement diseases, in conjunction with
The defect of current rail subgrade settlement Disease Treatment method is insufficient, provides a kind of suitable for the fast of Settlement diseases railway bed lifting
Speed regulation restorative procedure.
For this purpose, technical scheme is as follows：
A method of for being lifted Settlement diseases railway bed, include the following steps：
S1. boring positioning：Determine that the region of Settlement diseases occurs for ballastless track of high-speed railway, and by Track Settlement most serious
Initial position is renovated in position as Settlement diseases；Horizontal jet grouting is set up in the roadbed side slope side that Subgrade Bed of High-speed Railway is formed
The fixing bracket of equipment installs the bore position of horizontal jet grouting equipment and the determination horizontal jet grouting stake to be made；
S2. fastener unlocks：During ballastless track of high-speed railway is lifted, with the length range of single track plates for one
Lifting section unclamps all fasteners of the track plates upper edge track length direction trapped orbit before lifting；
S3. rotary-spraying construction：Start horizontal jet grouting equipment, along the bore position forward direction horizontal drilling, churning to drill bit away from
The distance of opposite side slope surface stops when being 1~2m；Later, drill bit is reversely gradually backed out, while churning quick-set, churning
Pressure is 10-30MPa；Drill bit is retreated at away from the side slope surface positions 1.5m, is stopped whitewashing, is continued to invert, until drill bit
Roadbed ontology is exited completely, completes the making of a horizontal jet grouting stake；
S4. rotary churning pile equipment shifts：Rotary churning pile equipment is moved into next position, is repeated the above process, positive drilling is carried out
It is operated with reversed churning, completes the making of next horizontal jet grouting stake, until completing whole lifts of exceeded section of this railroad bed settlement
Rise work.
Preferably, in step S1, the bore position is located at 1~2m of subgrade bed surface or less.
Preferably, in step S3, the quick-set is cement matrix rapid-hardening material, and the presetting period is less than 30min,
Final setting time is less than 6h.
Preferably, in step S3, the stake diameter of the rotary churning pile is 0.2~0.4m, the spacing of adjacent rotary churning pile is 1.0~
The horizontal distance on 2.0m, rotary churning pile and both sides side slope of embankment surface is 1~2m.
Preferably, in step s3, in drilling process, drill bit churning clear water, churning pressure is 2~5MPa.
Preferably, it is additionally provided with observation stake on the track plates on subgrade bed surface, in step s3, is bored in rotary churning pile
Into and reversed whitewashing fallback procedures in, the observation stake on subgrade bed surface is continuously monitored using electronic level, obtains rail
Arch amount of road structure during churning.
Preferably, after step S4 completes all lifting work, railway is determined according to the monitoring result of electronic level
Roadbed is lifted short position and carries out piling operation.
When carrying out piling, piling position can be close on former stake position, forming local Double-row-piles Structure.When carrying out piling,
Piling position may be located on adjacent between two, make the increase in density of local rotary churning pile.
The method for being lifted Settlement diseases railway bed of the present invention, under conditions of not influencing railway normal operation,
Rotary churning pile is set in railway bed both sides side slope part of horizontal using horizontal jet grouting stake equipment, controls rotary churning pile churning pressure and rotation
Spray stake diameter, the rapid hardening using churning material and microdilatancy characteristic realize the above foundation bed structure of rotary churning pile and track structure
Whole lifting, improves working space utilization ratio, reduces workload of reaching the standard grade, and it is controllable, high to settle exceeded roadbed lifting effect
Effect, energy-saving and environmental protection, cost performance protrudes, and in the regulation recovery project in railroad bed settlement disease section, has wide engineering
Change application space.Small, economic and reliable is interfered in this method technology maturation, construction, on the basis using existing rotary churning pile reinforcement technique
On, it is applied by novelty, realizes the lifting reparation to Settlement diseases railway bed, be a kind of quick, convenient, efficient, real
Novel restoring and fastening method.Its effect is embodied in following several respects：
(1) by Railway Bed Slope one or both sides away from rotary churning pile is set at the positions 1~2m of top of the slope, by Settlement diseases
The key operation area of roadbed repairing and reinforcement is transferred to roadbed both sides by track plates position, is effectively utilized Railway Bed Slope operation
Space reduces operating personnel's upper track operation, reaches minimum to the interference of railway in operation；
(2) vertical rotary churning pile is adapted as horizontal jet grouting stake, extends the application range of rotary churning pile, churning material is rapid hardening
Property cement matrix rapid-hardening material, can quickly form intensity, and make full use of the fast hard microdilatancy characteristic of churning material, realize
Overlying bedding and the whole of track structure are lifted.
(3) soil arching effect for making full use of embankment filled soil, before preventing rotary churning pile drilling and churning material from not forming intensity
Bedding disturbance softens sedimentation phenomenon, low engineering cost.
(4) it in rotary churning pile formation of pile, monitors surface layer of subgrade bed absolute altitude situation of change in real time using electronic level, passes through benefit
Stake and the final Uplifting amount for setting the free control settlement roadbed of double piling method realize the entirety lifting to railway bed structure
With the quick reparation of Settlement diseases, the control of lifting effect is flexibly.
(5) it is suitble in common railway, high-speed railway and heavy haul railway fill subgrade generation sedimentation disease under various railway roadbed forms
Lifting reparation after evil, it is applied widely.
(6) churning material is cement matrix class rapid-hardening material, rotary churning pile early stage quality controllable, economy and durability
It is good.
Description of the drawings
Fig. 1 is the constructing structure schematic diagram for being lifted Settlement diseases railway bed method of the present invention；
Fig. 2 is the overlooking structure diagram of roadbed after the method lifting roadbed using the present invention；
Fig. 3 is the longitudinal profile structure schematic of roadbed after the method lifting roadbed using the present invention.
Wherein：
1. 6. track plates of stake are observed on 2. horizontal jet grouting equipment of subgrade bed, 3. horizontal jet grouting stake, 4. bedding surface 5.
7. 8. fastener of track
Specific implementation mode
The technical solution further illustrated the present invention with reference to specific embodiment.
Referring to Fig. 1-Fig. 3, a method of for being lifted Settlement diseases railway bed, include the following steps：
S1. boring positioning：First, determine that the region of Settlement diseases occurs for ballastless track of high-speed railway, and by Track Settlement
The initial position that the position of most serious is renovated as Settlement diseases；In the roadbed side slope one that the subgrade bed 1 of high-speed railway is formed
Side sets up the brill of the fixing bracket of horizontal jet grouting equipment 2, installation horizontal jet grouting equipment 2 and the determination horizontal jet grouting stake 3 to be made
Hole site.
Above-mentioned bore position is normally at 4 or less 1~2m of subgrade bed surface.
S2. fastener unlocks：During ballastless track of high-speed railway is lifted, with the length range of single track plates 6 for one
A lifting section unclamps all fasteners 8 of the track plates upper edge track length direction trapped orbit 7 before lifting.
S3. rotary-spraying construction：Start horizontal jet grouting equipment 2, along the bore position forward direction horizontal drilling, churning to drill bit away from
The distance of opposite side slope surface stops when being 1~2m；Later, drill bit is reversely gradually backed out, while churning quick-set, churning
Pressure is 10-30MPa；Drill bit is retreated at away from the side slope surface positions 1.5m, is stopped whitewashing, is continued to invert, until drill bit
Roadbed ontology 1 is exited completely, completes the making of a horizontal jet grouting stake 3.Wherein：
In drilling process, drill bit churning clear water, churning pressure is 2~5MPa.
The quick-set is cement matrix rapid-hardening material, and the presetting period is less than 30min, and final setting time is less than 6h.
In the implementation of the present invention, cement matrix rapid-hardening material is using the production of three special cement Co., Ltd of lion group of Zhejiang
Three lion spy's material-EQC double-quick cements repairing material.It is of course also possible to use other suitable cement matrix rapid-hardening materials, as long as its
Meet microdilatancy property and energy rapid hardening.
The stake diameter of above-mentioned rotary churning pile is generally 0.2~0.4m, and the spacing of adjacent rotary churning pile is 1.0~2.0m, rotary churning pile with
The horizontal distance on both sides side slope of embankment surface is 1~2m.
S4. rotary churning pile equipment shifts：Rotary churning pile equipment 2 is moved into next position, is repeated the above process, positive drilling is carried out
It is operated with reversed churning, completes the making of next horizontal jet grouting stake, until completing whole lifts of exceeded section of this railroad bed settlement
Rise work.
In addition, volume expansion will occur after churning material initial set, for this purpose, also being set on the track plates on subgrade bed surface 4
It is equipped with observation stake 5, in step s3, in rotary churning pile drilling and reversed whitewashing fallback procedures, is supervised in real time using electronic level
The observation stake 5 on subgrade bed surface is surveyed, monitors the uplift scope of surface layer of subgrade bed in real time, obtains railway track structure in churning process
In arch amount.After step S4 completes all lifting work, determine that railway bed is lifted according to the monitoring result of electronic level
It rises short position and carries out piling operation.When carrying out piling, piling position can be close on former stake position, forming local double-row pile
Structure；Piling position may be located on adjacent between two.After rotary churning pile equipment 2 is moved to piling position, you can carry out piling
Operation.
After roadbed lifting, all fasteners 8 of trapped orbit 7 on track plates are tightened.
The above method is primarily adapted for use in the regulation of ballastless track of high-speed railway Settlement diseases, is handled by suitably adjustment, together
Sample can be applied to the Ballast track in common railway, heavy haul railway and high-speed railway.
Claims (9)
1. a kind of method for being lifted Settlement diseases railway bed, it is characterised in that include the following steps：
S1. boring positioning：Determine that the region of Settlement diseases occurs for ballastless track of high-speed railway, and by Track Settlement most serious position
Initial position is renovated as Settlement diseases；Horizontal jet grouting is set up in the roadbed side slope side that Subgrade Bed of High-speed Railway (1) is formed
The bore position of the fixing bracket of equipment (2), installation horizontal jet grouting equipment (2) and the determination horizontal jet grouting stake (3) to be made；
S2. fastener unlocks：During ballastless track of high-speed railway is lifted, with the length range of single track plates (6) for one
Lifting section unclamps all fasteners (8) of the track plates upper edge track length direction trapped orbit (7) before lifting；
S3. rotary-spraying construction：Start horizontal jet grouting equipment (2), along the bore position forward direction horizontal drilling, churning to drill bit is away from right
To the distance of side slope surface be 1~2m when stop；Later, drill bit is reversely gradually backed out, while churning quick-set, churning pressure
Power is 10-30MPa；Drill bit is retreated at away from the side slope surface positions 1.5m, is stopped whitewashing, is continued to invert, until drill bit is complete
It is complete to exit roadbed ontology (1), complete the making of a horizontal jet grouting stake；
S4. rotary churning pile equipment shifts：Rotary churning pile equipment (2) is moved into next position, is repeated the above process, carry out positive drilling and
Reversed churning operation, completes the making of next horizontal jet grouting stake, until completing whole liftings of exceeded section of this railroad bed settlement
Work.
2. according to the method described in claim 1, it is characterized in that：In step S1, the bore position is located at subgrade bed table
Face (4) is below at 1~2m.
3. according to the method described in claim 1, it is characterized in that：In step S3, the quick-set is cement matrix class speed
Solidifying proximate matter material, presetting period are less than 30min, and final setting time is less than 6h.
4. according to the method described in claim 1, it is characterized in that：In step S3, the stake diameter of the rotary churning pile is 0.2~
0.4m, the spacing of adjacent rotary churning pile are 1.0~2.0m, and the horizontal distance on rotary churning pile and both sides side slope of embankment surface is 1~2m.
5. according to the described method of any one of claim 1-4, it is characterised in that：In step s3, it in drilling process, bores
Head churning clear water, churning pressure are 2~5MPa.
6. according to the method described in claim 5, it is characterized in that：It is additionally provided on the track plates of subgrade bed surface (4)
Stake (5) is observed, in step s3, in rotary churning pile drilling and reversed whitewashing fallback procedures, is continuously monitored using electronic level
The observation stake 5 on subgrade bed surface obtains arch amount of railway track structure during churning.
7. according to the method described in claim 5, it is characterized in that：After step S4 completes all lifting work, according to electronics
The monitoring result of spirit level determines railway bed lifting short position and carries out piling operation.
8. according to the method described in claim 6, it is characterized in that：When carrying out piling, piling is positioned next on former stake position, shape
At local Double-row-piles Structure.
9. according to the method described in claim 6, it is characterized in that：When carrying out piling, piling position is positioned at adjacent between two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810191878.6A CN108642975B (en) | 2018-03-08 | 2018-03-08 | Method for lifting settlement damaged railway roadbed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810191878.6A CN108642975B (en) | 2018-03-08 | 2018-03-08 | Method for lifting settlement damaged railway roadbed |
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| CN108642975A true CN108642975A (en) | 2018-10-12 |
| CN108642975B CN108642975B (en) | 2020-01-21 |
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| CN201810191878.6A Active CN108642975B (en) | 2018-03-08 | 2018-03-08 | Method for lifting settlement damaged railway roadbed |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110896696A (en) * | 2019-11-19 | 2020-03-24 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Greening method by spraying and seeding fiber granules |
| CN111472221A (en) * | 2020-04-15 | 2020-07-31 | 陕西融创交通科技有限公司 | Subgrade settlement treatment method |
| CN114606803A (en) * | 2021-12-17 | 2022-06-10 | 中铁二院工程集团有限责任公司 | Height-adjustable composite high-speed railway roadbed structure and design method thereof |
| CN115677253A (en) * | 2022-11-10 | 2023-02-03 | 绵阳市安州区荣盛建材有限公司 | Multi-cement composite early strength agent and application thereof in concrete member |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886382A (en) * | 2010-06-22 | 2010-11-17 | 中铁第四勘察设计院集团有限公司 | Soft foundation reinforcing method of existing railway or highway subgrade construction |
| EP2468954A1 (en) * | 2010-12-27 | 2012-06-27 | Sonneville AG | Method for manufacturing a ballastless trackway for rail vehicles with an recue route for street vehicles |
| CN205314083U (en) * | 2015-12-04 | 2016-06-15 | 中铁第四勘察设计院集团有限公司 | Novel ground is consolidated in stake of major diameter composite construction |
| CN206902479U (en) * | 2017-06-27 | 2018-01-19 | 中铁第四勘察设计院集团有限公司 | Ballastless track roadbed Deformation control is worn under a kind of aqueduct with repairing structure |
| CN207210848U (en) * | 2017-04-10 | 2018-04-10 | 中铁第四勘察设计院集团有限公司 | Concurrent operation high-speed railway separate type circuit road structure |
-
2018
- 2018-03-08 CN CN201810191878.6A patent/CN108642975B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886382A (en) * | 2010-06-22 | 2010-11-17 | 中铁第四勘察设计院集团有限公司 | Soft foundation reinforcing method of existing railway or highway subgrade construction |
| EP2468954A1 (en) * | 2010-12-27 | 2012-06-27 | Sonneville AG | Method for manufacturing a ballastless trackway for rail vehicles with an recue route for street vehicles |
| CN205314083U (en) * | 2015-12-04 | 2016-06-15 | 中铁第四勘察设计院集团有限公司 | Novel ground is consolidated in stake of major diameter composite construction |
| CN207210848U (en) * | 2017-04-10 | 2018-04-10 | 中铁第四勘察设计院集团有限公司 | Concurrent operation high-speed railway separate type circuit road structure |
| CN206902479U (en) * | 2017-06-27 | 2018-01-19 | 中铁第四勘察设计院集团有限公司 | Ballastless track roadbed Deformation control is worn under a kind of aqueduct with repairing structure |
Non-Patent Citations (1)
| Title |
|---|
| 李跃鹏: "含软弱夹层重载铁路路基水平旋喷桩加固效果分析", 《运营与维护》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110896696A (en) * | 2019-11-19 | 2020-03-24 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Greening method by spraying and seeding fiber granules |
| CN111472221A (en) * | 2020-04-15 | 2020-07-31 | 陕西融创交通科技有限公司 | Subgrade settlement treatment method |
| CN114606803A (en) * | 2021-12-17 | 2022-06-10 | 中铁二院工程集团有限责任公司 | Height-adjustable composite high-speed railway roadbed structure and design method thereof |
| CN115677253A (en) * | 2022-11-10 | 2023-02-03 | 绵阳市安州区荣盛建材有限公司 | Multi-cement composite early strength agent and application thereof in concrete member |
| CN115677253B (en) * | 2022-11-10 | 2024-02-06 | 绵阳市安州区荣盛建材有限公司 | Multi-cement composite early strength agent and application thereof in concrete member |
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| CN108642975B (en) | 2020-01-21 |
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