CN108642975B - Method for lifting settlement damaged railway roadbed - Google Patents
Method for lifting settlement damaged railway roadbed Download PDFInfo
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- CN108642975B CN108642975B CN201810191878.6A CN201810191878A CN108642975B CN 108642975 B CN108642975 B CN 108642975B CN 201810191878 A CN201810191878 A CN 201810191878A CN 108642975 B CN108642975 B CN 108642975B
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- pile
- roadbed
- jet grouting
- lifting
- settlement
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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
Abstract
The invention discloses a method for lifting a settlement damaged railway roadbed, which comprises the following steps: s1, drilling and positioning; s2, unlocking a fastener; s3, rotary spraying construction: starting horizontal rotary spraying equipment, drilling horizontally along the forward direction of the drilling position, and stopping rotary spraying until the distance between the drill bit and the opposite slope surface is 1-2 m; then, the drill bit is reversely and gradually withdrawn, and simultaneously, the quick setting material is sprayed in a rotary mode; the rotary jet drill bit retreats to a position 1.5m away from the surface of the side slope, the guniting is stopped, the rotary jet drill bit continues to rotate reversely until the drill bit completely exits from the roadbed body, and the manufacturing of a horizontal rotary jet pile is completed; and S4, moving the jet grouting pile equipment to the next pile position, and repeating the process until the whole lifting work of the settlement super-standard section of the railway roadbed is completed. The method realizes the integral lifting of the foundation bed structure and the track structure above the jet grouting pile under the condition of not influencing the normal operation of the railway, improves the utilization efficiency of the operation space, reduces the online workload, and has controllable lifting effect, high efficiency, energy conservation, environmental protection and high cost performance of the settlement superscript roadbed.
Description
Technical Field
The invention belongs to the technical field of maintenance and repair of railway subgrades, and particularly relates to a method for lifting a settlement damaged railway subgrade.
Background
By the end of 2016, the total mileage of the national railway operation reaches 12 kilometers, wherein the mileage of the high-speed railway operation reaches 1.9 kilometers, which also marks that the railway engineering construction and operation of China reach a brand new stage. Along with the large-scale construction and operation of railways in China, various railway diseases and maintenance problems are always the key puzzling the construction and development of railways in China, wherein the problem of settlement diseases in the railway operation process is particularly prominent. In order to ensure the railway operation safety of China, the requirement on the smoothness of a line track is relatively high, the operation railway has very strict control on subgrade settlement, for example, the speed per hour of China is 300km/h or more, and the total settlement of the subgrade after operation is opened is not more than 15mm in principle. In actual engineering, a large number of railways in China penetrate through unfavorable geological zones such as soft soil, loess and karst, the problem of roadbed deformation exists, particularly, various railways built in a soft soil development area have the physical and mechanical characteristics such as large water content, high compressibility, low strength, small permeability coefficient, long consolidation period and the like, the problems of regional post-construction settlement exceeding standard and the like are still very prominent, and the high-speed safe operation of railways in China is seriously influenced by the exceeding standard of the settlement of the railway roadbed.
At present, aiming at the problem of railway line irregularity caused by post-construction settlement, the following maintenance methods are mainly adopted under the condition of not interrupting the vehicle communication: firstly, the method adopts a mode of adjusting the fastener or increasing the adjustable quantity of the fastener for processing, the method can recover the smoothness of the track structure to a certain extent, but the total adjustable quantity is relatively limited, and the adjustment amplitude of the fastener has a limit value; secondly, for the ballast track, a method for newly adding ballast bed ballasts is adopted, the method is relatively economic and efficient for the ballast track, but large-scale ballast replacement and filling are still insufficient to control subgrade settlement under the condition that the bed packing is relatively poor, so that excessive ballast filling is caused to form ballast bags; thirdly, for the ballastless track, a track plate high polymer grouting mode is adopted, the track plate is lifted through tooling equipment, fast-hardening high polymer is filled between the track plate and the concrete foundation bed, and the smoothness of the ballastless track is recovered.
Disclosure of Invention
The invention aims to provide a rapid repairing method suitable for the lifting of a railway subgrade with settlement diseases, aiming at the practical requirements of rapid repairing and repairing of the railway engineering settlement diseases in China and combining the defects of the current railway subgrade settlement disease repairing method.
Therefore, the technical scheme of the invention is as follows:
a method for lifting a subsidence damaged railroad bed, comprising the steps of:
s1, drilling and positioning: determining an area where the ballastless track of the high-speed railway has settlement diseases, and taking the position with the most serious line settlement as a settlement disease treatment starting position; erecting a fixed support of horizontal jet grouting equipment on one side of a roadbed slope formed by a high-speed railway roadbed, installing the horizontal jet grouting equipment and determining the drilling position of a horizontal jet grouting pile to be manufactured;
s2, unlocking a fastener: in the process of lifting the ballastless track of the high-speed railway, taking the length range of a single track board as a lifting section, and before lifting, loosening all fasteners for fixing the track on the track board along the length direction of the track;
s3, rotary spraying construction: starting horizontal rotary spraying equipment, drilling horizontally along the forward direction of the drilling position, and stopping rotary spraying until the distance between the drill bit and the opposite slope surface is 1-2 m; then, the drill bit is reversely and gradually withdrawn, and simultaneously the quick setting material is sprayed in a rotary mode, wherein the rotary spraying pressure is 10-30 MPa; the rotary jet drill bit retreats to a position 1.5m away from the surface of the side slope, the guniting is stopped, the rotary jet drill bit continues to rotate reversely until the drill bit completely exits from the roadbed bed, and the manufacturing of a horizontal rotary jet pile is completed;
s4, horizontal rotary spraying equipment is shifted: and moving the horizontal jet grouting equipment to the next pile position, repeating the processes, and performing forward drilling and reverse jet grouting operation to finish the manufacture of the next horizontal jet grouting pile until the complete lifting work of the settlement superscripted section of the railway roadbed is finished.
Preferably, in step S1, the drilling position is 1-2 m below the surface of the roadbed.
Preferably, in step S3, the quick setting material is a cement-based quick setting material, the initial setting time is less than 30min, and the final setting time is less than 6 h.
Preferably, in step S3, the pile diameter of the jet grouting piles is 0.2 to 0.4m, the distance between adjacent jet grouting piles is 1.0 to 2.0m, and the horizontal distance between the jet grouting piles and the side slope surfaces of the embankment on the two sides is 1 to 2 m.
Preferably, in step S3, during the drilling process, the drill bit is sprayed with clean water at a pressure of 2-5 MPa.
Preferably, observation piles are further provided on the track slabs on the surface of the roadbed, and in step S3, the observation piles on the surface of the roadbed are continuously monitored by an electronic level during the drilling of the jet grouting piles and the backward grouting to obtain the amount of upward arching of the railway track structure during the jet grouting.
Preferably, after the lifting work is completed in step S4, a location where the railway roadbed is insufficiently lifted is determined based on the monitoring result of the electronic level and pile repairing operation is performed.
When pile repairing is carried out, the pile repairing position can be close to the original pile position, and a local double-row pile structure is formed. When the pile is repaired, the pile repairing position can be positioned between two adjacent piles, so that the density of the local jet grouting pile is increased.
According to the method for lifting the settlement damaged railway roadbed, under the condition that the normal operation of a railway is not influenced, the horizontal rotary spraying equipment is adopted to horizontally drive the rotary spraying piles on the side slope parts on the two sides of the railway roadbed, the rotary spraying pressure and the diameter of the rotary spraying piles are controlled, the rapid hardening and micro-expansion characteristics of rotary spraying materials are utilized, the integral lifting of the foundation bed structure above the rotary spraying piles and the track structure is realized, the utilization efficiency of the operation space is improved, the online operation amount is reduced, the settlement superscript roadbed lifting effect is controllable, efficient, energy-saving, environment-friendly and outstanding in cost performance, and the method has a wide engineering application space in the renovation and restoration engineering of the settlement damaged railway roadbed section of the railway roadbed. The method is mature in technology, small in construction interference, economical and reliable, achieves lifting repair of the railway subgrade with the settlement defects through innovative application on the basis of utilizing the existing jet grouting pile reinforcement technology, and is a novel repair and reinforcement method which is rapid, convenient, efficient and practical. The effects are embodied in the following aspects:
(1) the method has the advantages that the rotary spraying piles are arranged at the positions, 1-2 m away from the top of the slope, of one side or two sides of the side slope of the railway roadbed, main operation areas for repairing and reinforcing the subgrade with the settlement defects are transferred to the two sides of the subgrade from the track plate parts, the operation space of the side slope of the railway roadbed is effectively utilized, the operation of operators on the road is reduced, and the interference to an operation railway is minimized;
(2) the horizontal jet grouting pile is modified from the vertical jet grouting pile, the application range of the jet grouting pile is expanded, the jet grouting material is a quick-setting cement matrix quick-setting material, the strength can be quickly formed, the quick-hardening micro-expansion characteristic of the jet grouting material is fully utilized, and the integral lifting of the upper foundation bed and the track structure is realized.
(3) The soil arch effect of embankment filling is fully utilized, the phenomena of disturbance, softening and settlement of a foundation bed before drilling of the jet grouting pile and strength of jet grouting materials are not formed are prevented, and the construction cost is low.
(4) In the pile forming process of the jet grouting pile, the electronic level is adopted to monitor the elevation change condition of the surface layer of the foundation bed in real time, the final lifting amount of the settlement roadbed is freely controlled by pile supplementing and pile driving and arranging double rows of piles, the whole lifting of the railway roadbed structure and the quick repair of settlement diseases are realized, and the lifting effect is flexibly controlled.
(5) The method is suitable for lifting and repairing the filler roadbed in various roadbed forms in the ordinary railway, the high-speed railway and the heavy haul railway after settlement damage occurs, and has a wide application range.
(6) The rotary spraying material is a cement matrix type quick-setting material, the early quality of the rotary spraying pile is controllable, and the economical efficiency and the durability are good.
Drawings
FIG. 1 is a schematic construction structure diagram of the method for lifting a settlement damaged railway roadbed according to the invention;
fig. 2 is a schematic view of a top view of the roadbed after the roadbed is lifted by the method of the present invention;
fig. 3 is a schematic view showing a longitudinal sectional structure of a roadbed after the roadbed is lifted by using the method of the invention.
Wherein:
1. roadbed 2, horizontal rotary spraying equipment 3, horizontal rotary spraying pile 4, surface of roadbed 5, observation pile 6, track slab
7. Rail 8 fastener
Detailed Description
The technical scheme of the invention is further explained by combining specific examples.
Referring to fig. 1-3, a method for lifting a subsidence damaged railroad bed includes the steps of:
s1, drilling and positioning: firstly, determining an area where settlement diseases occur on a ballastless track of a high-speed railway, and taking the position with the most serious line settlement as an initial position for settlement disease treatment; a fixed support of a horizontal jet grouting device 2 is erected on one side of a roadbed slope formed by a roadbed 1 of the high-speed railway, the horizontal jet grouting device 2 is installed, and the drilling position of a horizontal jet grouting pile 3 to be manufactured is determined.
The drilling position is generally 1-2 m below the surface 4 of the roadbed.
S2, unlocking a fastener: in the process of lifting the ballastless track of the high-speed railway, the length range of a single track plate 6 is taken as a lifting section, and all fasteners 8 for fixing the track 7 on the track plate along the length direction of the track are loosened before lifting.
S3, rotary spraying construction: starting the horizontal rotary spraying equipment 2, drilling along the drilling position in a forward horizontal mode, and stopping rotary spraying until the distance between the drill bit and the opposite slope surface is 1-2 m; then, the drill bit is reversely and gradually withdrawn, and simultaneously the quick setting material is sprayed in a rotary mode, wherein the rotary spraying pressure is 10-30 MPa; and (3) retreating the rotary jet drill bit to a position 1.5m away from the surface of the side slope, stopping guniting, and continuing to rotate reversely until the drill bit completely retreats from the roadbed 1 to finish the manufacture of a horizontal rotary jet pile 3. Wherein:
and in the drilling process, the drill bit is sprayed with clean water in a rotary mode, and the rotary spraying pressure is 2-5 MPa.
The quick-setting material is a cement matrix quick-setting material, the initial setting time is less than 30min, and the final setting time is less than 6 h. In one implementation of the invention, the cement matrix rapid-setting material is a three-lion special material-EQC double-rapid cement rush-repair material produced by Zhejiang three-lion group special cement Co. Of course, other suitable cement-based quick setting materials may be used so long as they satisfy the micro-expansive properties and are capable of quick setting.
The diameter of the rotary spraying pile is generally 0.2-0.4 m, the distance between adjacent rotary spraying piles is 1.0-2.0 m, and the horizontal distance between the rotary spraying pile and the surface of the side slope of the embankment on the two sides is 1-2 m.
S4, horizontal rotary spraying equipment is shifted: and moving the horizontal jet grouting equipment 2 to the next pile position, repeating the processes, and performing forward drilling and reverse jet grouting operation to finish the manufacture of the next horizontal jet grouting pile until the complete lifting work of the settlement superscripted section of the railway roadbed is finished.
In addition, the volume expansion will occur after the initial setting of the jet grouting material, for this reason, the observation pile 5 is further arranged on the track slab on the roadbed surface 4, in step S3, during the drilling and reverse guniting retreating process of the jet grouting pile, the observation pile 5 on the roadbed surface is monitored in real time by using an electronic level gauge, the lifting amplitude of the roadbed surface layer is monitored in real time, and the arching amount of the railway track structure in the jet grouting process is obtained. And after all lifting work is finished in the step S4, determining the insufficient lifting part of the railway roadbed according to the monitoring result of the electronic level gauge and performing pile repairing operation. When pile repairing is carried out, the pile repairing position can be close to the original pile position, so that a local double-row pile structure is formed; the pile repair position can also be positioned between two adjacent piles. And (4) moving the horizontal rotary spraying equipment 2 to a pile repairing position, and then performing pile repairing operation.
After the roadbed is lifted, all fasteners 8 for fixing the track 7 on the track slab are screwed.
The method is mainly suitable for treating the settlement diseases of the ballastless tracks of the high-speed railway, and can be also applied to ballasted tracks in ordinary railways, heavy haul railways and high-speed railways after proper adjustment treatment.
Claims (6)
1. A method for lifting a railway subgrade with settlement diseases is characterized by comprising the following steps:
s1, drilling and positioning: determining an area where the ballastless track of the high-speed railway has settlement diseases, and taking the position with the most serious line settlement as a settlement disease treatment starting position; erecting a fixed support of horizontal rotary spraying equipment (2) on one side of a roadbed slope formed by a high-speed railway roadbed foundation bed (1), installing the horizontal rotary spraying equipment (2) and determining the drilling position of a horizontal rotary spraying pile (3) to be manufactured;
s2, unlocking a fastener: in the process of lifting the ballastless track of the high-speed railway, taking the length range of a single track plate (6) as a lifting section, and before lifting, loosening all fasteners (8) for fixing the track (7) on the track plate along the length direction of the track;
s3, rotary spraying construction: starting the horizontal rotary spraying equipment (2), drilling horizontally along the forward direction of the drilling position, and stopping the rotary spraying until the distance between the drill bit and the opposite slope surface is 1-2 m; then, the drill bit is reversely and gradually withdrawn, and simultaneously the quick setting material is sprayed in a rotary mode, wherein the rotary spraying pressure is 10-30 MPa; the jet grouting drill bit retreats to a position 1.5m away from the surface of the side slope, grouting is stopped, and the jet grouting drill bit continues to rotate reversely until the drill bit completely retreats from the roadbed (1), so that the manufacturing of a horizontal jet grouting pile is completed, wherein the pile diameter of the horizontal jet grouting pile is 0.2-0.4 m, the distance between adjacent jet grouting piles is 1.0-2.0 m, and the horizontal distance between the jet grouting pile and the surface of the side slope of the embankment on two sides is 1-2 m; an observation pile (5) is also arranged on the track slab on the surface (4) of the roadbed, and the observation pile (5) on the surface of the roadbed is continuously monitored by using an electronic level during the drilling process and the reverse guniting retreating process of the jet grouting pile, so that the upwarp amount of the railway track structure during the jet grouting process is obtained;
s4, horizontal rotary spraying equipment is shifted: moving the horizontal jet grouting equipment (2) to the next pile position, repeating the process, performing forward drilling and reverse jet grouting operation, and completing the manufacture of the next horizontal jet grouting pile until the complete lifting work of the settlement superscripted section of the railway roadbed is completed;
s5, after all lifting work is completed in the step S4, determining the insufficient lifting part of the railway roadbed according to the monitoring result of the electronic level gauge and performing pile supplementing operation.
2. The method of claim 1, wherein: in step S1, the drilling position is 1-2 m below the surface (4) of the roadbed.
3. The method of claim 1, wherein: in step S3, the quick-setting material is a cement-based quick-setting material, the initial setting time is less than 30min, and the final setting time is less than 6 h.
4. The method according to any one of claims 1-3, wherein: in step S3, in the drilling process, the drill bit is sprayed with clean water in a rotary mode, and the rotary spraying pressure is 2-5 MPa.
5. The method of claim 4, wherein: when pile repairing is carried out, the pile repairing position is close to the original pile position, and a local double-row pile structure is formed.
6. The method of claim 4, wherein: when the pile is repaired, the pile repairing position is located between two adjacent piles.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810191878.6A CN108642975B (en) | 2018-03-08 | 2018-03-08 | Method for lifting settlement damaged railway roadbed |
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| CN201810191878.6A CN108642975B (en) | 2018-03-08 | 2018-03-08 | Method for lifting settlement damaged railway roadbed |
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| CN108642975B true CN108642975B (en) | 2020-01-21 |
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| 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 |
| 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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| CN101886382B (en) * | 2010-06-22 | 2012-05-23 | 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 |
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